@font-face{font-family:Space Grotesk Variable;font-style:normal;font-display:swap;font-weight:300 700;src:url(/assets/space-grotesk-vietnamese-wght-normal-D0rl6rjA.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Space Grotesk Variable;font-style:normal;font-display:swap;font-weight:300 700;src:url(/assets/space-grotesk-latin-ext-wght-normal-D9tNdqV9.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Space Grotesk Variable;font-style:normal;font-display:swap;font-weight:300 700;src:url(/assets/space-grotesk-latin-wght-normal-BhU9QXUp.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-ext-wght-normal-BOeWTOD4.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-wght-normal-DqGufNeO.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-ext-wght-normal-DlzME5K_.woff2)format("woff2-variations");unicode-range:U+1F??}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-wght-normal-CkhJZR-_.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-vietnamese-wght-normal-CBcvBZtf.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-ext-wght-normal-DO1Apj_S.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-wght-normal-Dx4kXJAl.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-cyrillic-ext-wght-normal-EocZY2iu.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-cyrillic-wght-normal-D73BlboJ.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-greek-wght-normal-Bw9x6K1M.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-vietnamese-wght-normal-Bt-aOZkq.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-latin-ext-wght-normal-DBQx-q_a.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:JetBrains Mono Variable;font-style:normal;font-display:swap;font-weight:100 800;src:url(/assets/jetbrains-mono-latin-wght-normal-B9CIFXIH.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root,[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#03070d;--bg-elev:#060c16;--surface:#09111e;--surface-2:#0d1828;--surface-3:#132137;--line:#80aceb1c;--line-2:#80aceb30;--line-3:#80aceb52;--text:#e9f2fd;--text-2:#aebed6;--muted:#7587a3;--faint:#4b5b75;--accent:#38e1ff;--accent-ink:#00161d;--accent-soft:#38e1ff1f;--accent-line:#38e1ff61;--accent-2:#3d8bff;--violet:#9d8aff;--violet-soft:#9d8aff24;--mint:#4cf2b0;--mint-soft:#4cf2b01f;--amber:#ffc95c;--amber-soft:#ffc95c21;--coral:#ff6e86;--coral-soft:#ff6e8621;--grid:#78aaff0e;--glass:#09111eb8;--shadow-sm:0 1px 2px #0006;--shadow:0 1px 0 #ffffff09 inset, 0 24px 60px -24px #000000bf;--shadow-lg:0 1px 0 #ffffff0d inset, 0 40px 120px -30px #000000e6;--glow:0 0 0 1px #38e1ff66, 0 0 48px -8px #38e1ff73}[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f3f6fb;--bg-elev:#edf2f9;--surface:#fff;--surface-2:#f2f6fc;--surface-3:#e7eef8;--line:#0e264e1a;--line-2:#0e264e2b;--line-3:#0e264e47;--text:#07132a;--text-2:#36486a;--muted:#5f6f8a;--faint:#97a5ba;--accent:#0087b6;--accent-ink:#fff;--accent-soft:#0087b61a;--accent-line:#0087b666;--accent-2:#2468dc;--violet:#6a4fe3;--violet-soft:#6a4fe31a;--mint:#0a9a68;--mint-soft:#0a9a681a;--amber:#b77400;--amber-soft:#b774001a;--coral:#d23656;--coral-soft:#d2365617;--grid:#143c780f;--glass:#ffffffc7;--shadow-sm:0 1px 2px #0a1e3c14;--shadow:0 1px 0 #ffffffe6 inset, 0 18px 48px -24px #0a1e4647;--shadow-lg:0 30px 80px -30px #0a1e4659;--glow:0 0 0 1px #0087b659, 0 0 36px -10px #0087b666}:root{--font-display:"Space Grotesk Variable", "Space Grotesk", ui-sans-serif, system-ui, sans-serif;--font-sans:"Inter Variable", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono:"JetBrains Mono Variable", "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;--r-xs:6px;--r-sm:9px;--r:13px;--r-lg:18px;--r-xl:26px;--container:1220px;--gutter:clamp(16px, 4vw, 40px);--nav-h:68px;--ease:cubic-bezier(.2, .7, .2, 1);--ease-out:cubic-bezier(.16, 1, .3, 1)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scrollbar-color:var(--line-3) transparent}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}[data-motion=reduced] *,[data-motion=reduced] :before,[data-motion=reduced] :after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}body{background:var(--bg);min-height:100dvh;color:var(--text);font-family:var(--font-sans);font-feature-settings:"cv11", "ss01";-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;margin:0;font-size:16px;line-height:1.6;overflow-x:hidden}#root{flex-direction:column;min-height:100dvh;display:flex}h1,h2,h3,h4,h5{font-family:var(--font-display);letter-spacing:-.02em;text-wrap:balance;margin:0;font-weight:600;line-height:1.12}p{text-wrap:pretty;margin:0}a{color:inherit;text-decoration:none}img,svg,canvas,video{max-width:100%;display:block}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer;background:0 0;border:0;padding:0}button:disabled{cursor:not-allowed}ul,ol{margin:0;padding:0}::selection{background:var(--accent);color:var(--accent-ink)}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--line-2);background-clip:padding-box;border:2px solid #0000;border-radius:10px}::-webkit-scrollbar-track{background:0 0}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{z-index:1000;background:var(--accent);color:var(--accent-ink);border-radius:var(--r-sm);transition:transform .2s var(--ease);padding:10px 16px;font-weight:600;position:fixed;top:10px;left:10px;transform:translateY(-160%)}.skip-link:focus{transform:none}.container{width:100%;max-width:var(--container);padding-inline:var(--gutter);margin-inline:auto}.mono{font-family:var(--font-mono);font-feature-settings:"zero", "ss02"}.eyebrow{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent);align-items:center;gap:10px;font-size:12px;font-weight:500;display:inline-flex}.eyebrow:before{content:"";opacity:.8;background:currentColor;width:18px;height:1px}.muted{color:var(--muted)}.text-2{color:var(--text-2)}.grid-bg{background-image:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);background-size:40px 40px}.tabular{font-variant-numeric:tabular-nums}@keyframes fade-up{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse-ring{0%{box-shadow:0 0 0 0 var(--accent-line)}to{box-shadow:0 0 0 14px #0000}}@keyframes blink{50%{opacity:0}}.reveal{opacity:0;transition:opacity .8s var(--ease-out), transform .8s var(--ease-out);transform:translateY(18px)}.reveal.is-in{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}.btn{--btn-h:42px;height:var(--btn-h);border-radius:var(--r-sm);font-family:var(--font-sans);letter-spacing:-.005em;white-space:nowrap;transition:background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease), box-shadow .25s var(--ease), transform .18s var(--ease);-webkit-user-select:none;user-select:none;border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:0 18px;font-size:14.5px;font-weight:600;display:inline-flex}.btn svg{flex:none}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.45}.btn--sm{--btn-h:34px;border-radius:var(--r-xs);gap:6px;padding:0 12px;font-size:13px}.btn--lg{--btn-h:52px;border-radius:var(--r);padding:0 24px;font-size:16px}.btn--block{width:100%}.btn--icon{width:var(--btn-h);padding:0}.btn--primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 0 0 1px #ffffff26 inset, 0 8px 28px -10px var(--accent)}.btn--primary:hover:not(:disabled){box-shadow:0 0 0 1px #ffffff40 inset, 0 10px 36px -8px var(--accent);filter:brightness(1.06)}.btn--secondary{background:var(--surface-2);border-color:var(--line-2);color:var(--text)}.btn--secondary:hover:not(:disabled){border-color:var(--line-3);background:var(--surface-3)}.btn--ghost{color:var(--text-2)}.btn--ghost:hover:not(:disabled){color:var(--text);background:var(--surface-2)}.btn--outline{border-color:var(--accent-line);color:var(--accent);background:var(--accent-soft)}.btn--outline:hover:not(:disabled){background:color-mix(in srgb, var(--accent) 20%, transparent)}.btn--danger{color:var(--coral);border-color:color-mix(in srgb, var(--coral) 40%, transparent);background:var(--coral-soft)}.icon-btn{border-radius:var(--r-sm);width:36px;height:36px;color:var(--text-2);place-items:center;transition:background .15s,color .15s;display:inline-grid}.icon-btn:hover{background:var(--surface-2);color:var(--text)}.chip{border:1px solid var(--line-2);background:var(--surface-2);height:26px;color:var(--text-2);white-space:nowrap;border-radius:999px;align-items:center;gap:6px;padding:0 10px;font-size:12.5px;font-weight:500;display:inline-flex}.chip--accent{border-color:var(--accent-line);background:var(--accent-soft);color:var(--accent)}.chip--violet{border-color:color-mix(in srgb, var(--violet) 40%, transparent);background:var(--violet-soft);color:var(--violet)}.chip--mint{border-color:color-mix(in srgb, var(--mint) 40%, transparent);background:var(--mint-soft);color:var(--mint)}.chip--amber{border-color:color-mix(in srgb, var(--amber) 40%, transparent);background:var(--amber-soft);color:var(--amber)}.chip--coral{border-color:color-mix(in srgb, var(--coral) 40%, transparent);background:var(--coral-soft);color:var(--coral)}button.chip{cursor:pointer;transition:border-color .15s,color .15s,background .15s}button.chip:hover{border-color:var(--line-3);color:var(--text)}button.chip.is-active{border-color:var(--accent-line);background:var(--accent-soft);color:var(--accent)}.tag{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-size:11px}.kbd{min-width:22px;height:22px;font-family:var(--font-mono);color:var(--text-2);border:1px solid var(--line-2);background:var(--surface-2);border-bottom-width:2px;border-radius:6px;place-items:center;padding:0 6px;font-size:11px;display:inline-grid}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);position:relative}.card--pad{padding:22px}.card--hover{transition:border-color .2s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease)}.card--hover:hover{border-color:var(--line-3);transform:translateY(-2px)}.card__title{font-size:17px;font-weight:600}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg)}.hud{position:relative}.hud:before,.hud:after{content:"";border-color:var(--accent);opacity:.7;pointer-events:none;border-style:solid;width:12px;height:12px;position:absolute}.hud:before{border-width:1px 0 0 1px;border-top-left-radius:4px;top:-1px;left:-1px}.hud:after{border-width:0 1px 1px 0;border-bottom-right-radius:4px;bottom:-1px;right:-1px}.field{gap:7px;display:grid}.field__label{color:var(--text-2);font-size:13px;font-weight:600}.field__hint{color:var(--muted);font-size:12.5px}.input,.textarea,.select{border-radius:var(--r-sm);border:1px solid var(--line-2);background:var(--bg-elev);width:100%;min-height:44px;color:var(--text);padding:10px 14px;font-size:15px;transition:border-color .15s,box-shadow .15s}.textarea{resize:vertical;min-height:120px;line-height:1.55}.input::placeholder,.textarea::placeholder{color:var(--faint)}.input:focus,.textarea:focus,.select:focus{border-color:var(--accent-line);box-shadow:0 0 0 3px var(--accent-soft);outline:none}.progress{background:var(--surface-3);border-radius:99px;height:6px;position:relative;overflow:hidden}.progress>i{width:var(--p,0%);border-radius:inherit;background:linear-gradient(90deg, var(--accent-2), var(--accent));transition:width .6s var(--ease-out);position:absolute;inset:0 auto 0 0}.progress--thin{height:4px}.progress--violet>i{background:linear-gradient(90deg, var(--violet), var(--accent))}.avatar{--size:34px;width:var(--size);height:var(--size);font-family:var(--font-display);font-weight:700;font-size:calc(var(--size) * .4);color:#fff;background:linear-gradient(140deg, hsl(var(--h,190) 90% 58%), hsl(calc(var(--h,190) + 60) 80% 45%));box-shadow:0 0 0 2px var(--bg), 0 0 0 3px var(--line-2);border-radius:50%;flex:none;place-items:center;display:inline-grid}.dialog-backdrop{z-index:300;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);animation:fade-in .2s var(--ease);background:#01040aa8;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.dialog{background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r-xl);width:min(560px,100%);max-height:calc(100dvh - 40px);box-shadow:var(--shadow-lg);animation:fade-up .28s var(--ease-out);overflow:auto}.dialog__head{justify-content:space-between;align-items:start;gap:16px;padding:22px 22px 0;display:flex}.dialog__title{font-size:21px}.dialog__body{padding:16px 22px 22px}.dialog__foot{justify-content:flex-end;gap:10px;padding:0 22px 22px;display:flex}.toasts{z-index:400;pointer-events:none;justify-items:end;gap:10px;display:grid;position:fixed;bottom:18px;right:18px}.toast{pointer-events:auto;border-radius:var(--r);background:var(--glass);-webkit-backdrop-filter:blur(14px)saturate(1.4);backdrop-filter:blur(14px)saturate(1.4);border:1px solid var(--line-2);min-width:220px;max-width:340px;box-shadow:var(--shadow-lg);animation:toast-in .35s var(--ease-out);align-items:center;gap:12px;padding:12px 14px;display:flex}.toast__icon{background:var(--accent-soft);width:34px;height:34px;color:var(--accent);border-radius:10px;flex:none;place-items:center;display:grid}.toast--xp .toast__icon{background:var(--amber-soft);color:var(--amber)}.toast--badge .toast__icon{background:var(--violet-soft);color:var(--violet)}.toast--success .toast__icon{background:var(--mint-soft);color:var(--mint)}.toast--error .toast__icon{background:var(--coral-soft);color:var(--coral)}.toast__title{font-size:14px;font-weight:650;line-height:1.3}.toast__body{color:var(--text-2);font-size:12.5px;line-height:1.4}.toast--xp .toast__title{font-family:var(--font-mono);color:var(--amber)}@keyframes toast-in{0%{opacity:0;transform:translateY(10px)scale(.98)}to{opacity:1;transform:none}}.md{color:var(--text-2);font-size:16.5px;line-height:1.72}.md>*+*{margin-top:1em}.md h3{color:var(--text);margin-top:1.6em;font-size:21px}.md h4{color:var(--text);margin-top:1.4em;font-size:17px}.md strong{color:var(--text);font-weight:650}.md em{color:var(--text)}.md a{color:var(--accent);text-underline-offset:3px;text-decoration:underline;-webkit-text-decoration-color:var(--accent-line);text-decoration-color:var(--accent-line)}.md mark{background:linear-gradient(transparent 55%, color-mix(in srgb, var(--accent) 30%, transparent) 55%);color:var(--text);padding:0 2px}.md code{font-family:var(--font-mono);background:var(--surface-3);border:1px solid var(--line);color:var(--text);border-radius:6px;padding:2px 6px;font-size:.86em}.md ul,.md ol{padding-left:1.3em}.md li+li{margin-top:.4em}.md li::marker{color:var(--accent)}.md blockquote{border-left:2px solid var(--accent);color:var(--text);margin:1.2em 0;padding:4px 0 4px 18px;font-size:1.05em}.md-math{font-family:var(--font-mono);color:var(--text);white-space:nowrap;font-size:.92em}.md-formula{border-radius:var(--r);background:var(--surface-2);border:1px solid var(--line);font-family:var(--font-mono);text-align:center;color:var(--text);margin:1.3em 0;padding:18px 20px;font-size:17px;overflow-x:auto}.md-code{border-radius:var(--r);background:var(--bg-elev);border:1px solid var(--line);margin:1.2em 0;padding:16px 18px;font-size:14px;line-height:1.6;overflow-x:auto}.md-code code{font-size:inherit;background:0 0;border:0;padding:0}.md-callout{border-radius:var(--r);border:1px solid var(--accent-line);background:var(--accent-soft);color:var(--text);margin:1.4em 0;padding:16px 18px}.md-callout p{margin-top:6px;font-size:15.5px}.md-callout__label{align-items:baseline;gap:10px;font-size:15px;display:flex}.md-callout__label span{font-family:var(--font-mono);letter-spacing:.12em;color:var(--accent);font-size:11px}.md-callout--note{border-color:color-mix(in srgb, var(--violet) 40%, transparent);background:var(--violet-soft)}.md-callout--note .md-callout__label span{color:var(--violet)}.md-callout--warn{border-color:color-mix(in srgb, var(--amber) 40%, transparent);background:var(--amber-soft)}.md-callout--warn .md-callout__label span{color:var(--amber)}.md-callout--fact{border-color:color-mix(in srgb, var(--mint) 40%, transparent);background:var(--mint-soft)}.md-callout--fact .md-callout__label span{color:var(--mint)}.md-table-wrap{overflow-x:auto}.md-table{border-collapse:collapse;min-width:260px;font-size:14.5px}.md-table th,.md-table td{border:1px solid var(--line-2);text-align:center;padding:8px 14px}.md-table th{background:var(--surface-2);color:var(--text);font-family:var(--font-mono);font-size:12.5px;font-weight:600}.md-table td{font-family:var(--font-mono);color:var(--text)}.divider{background:var(--line);border:0;height:1px;margin:0}.empty{text-align:center;color:var(--muted);place-items:center;gap:10px;padding:48px 20px;display:grid}.spinner{border:2px solid var(--line-2);border-top-color:var(--accent);border-radius:50%;width:22px;height:22px;animation:.8s linear infinite spin}.loading-block{place-items:center;min-height:240px;display:grid}.stat-num{font-family:var(--font-display);letter-spacing:-.03em;font-variant-numeric:tabular-nums;font-weight:600}.tooltip{position:relative}.tooltip[data-tip]:hover:after{content:attr(data-tip);white-space:nowrap;background:var(--text);color:var(--bg);z-index:50;pointer-events:none;border-radius:7px;padding:6px 9px;font-size:12px;font-weight:500;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%)}.lab{grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:16px;display:grid}.lab__stage{gap:12px;min-width:0;display:grid}.lab__panel{border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);gap:14px;padding:16px;display:grid}@media (max-width:900px){.lab{grid-template-columns:1fr}}.stage{border-radius:var(--r-lg);border:1px solid var(--line-2);background-color:var(--bg-elev);background-image:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);isolation:isolate;background-position:-1px -1px;background-size:28px 28px;width:100%;position:relative;overflow:hidden}.stage>canvas,.stage>svg{touch-action:none;width:100%;height:100%;position:absolute;inset:0}.stage__label{z-index:2;font-family:var(--font-mono);letter-spacing:.12em;color:var(--muted);pointer-events:none;font-size:10.5px;position:absolute;top:10px;left:12px}.stage__corner{z-index:2;border:1px solid var(--accent);opacity:.55;pointer-events:none;width:10px;height:10px;position:absolute}.stage__corner--tl{border-width:1px 0 0 1px;top:6px;left:6px}.stage__corner--tr{border-width:1px 1px 0 0;top:6px;right:6px}.stage__corner--bl{border-width:0 0 1px 1px;bottom:6px;left:6px}.stage__corner--br{border-width:0 1px 1px 0;bottom:6px;right:6px}.panel-section{gap:12px;display:grid}.panel-section+.panel-section{border-top:1px solid var(--line);padding-top:14px}.panel-section__title{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-size:11px;font-weight:500}.lab-hint{color:var(--muted);font-size:13px;line-height:1.5}.lab-legend{color:var(--text-2);flex-wrap:wrap;gap:6px 14px;font-size:12.5px;list-style:none;display:flex}.lab-legend li{align-items:center;gap:6px;display:inline-flex}.lab-legend i{border-radius:3px;width:10px;height:10px}.lab-btn-row{flex-wrap:wrap;gap:8px;display:flex}.slider{gap:8px;display:grid}.slider__head{justify-content:space-between;align-items:baseline;gap:10px;font-size:13px;display:flex}.slider__head label{color:var(--text-2);font-weight:500}.slider__head output{font-family:var(--font-mono);color:var(--text);font-variant-numeric:tabular-nums;font-size:13px}.slider__head output small{color:var(--muted);font-size:11px}.slider input[type=range]{appearance:none;cursor:pointer;background:0 0;width:100%;height:22px;margin:0}.slider input[type=range]::-webkit-slider-runnable-track{background:linear-gradient(90deg, var(--accent) var(--pct), var(--surface-3) var(--pct));border-radius:4px;height:4px}.slider input[type=range]::-moz-range-track{background:var(--surface-3);border-radius:4px;height:4px}.slider input[type=range]::-moz-range-progress{background:var(--accent);border-radius:4px;height:4px}.slider input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;background:var(--text);border:3px solid var(--accent);width:16px;height:16px;box-shadow:0 0 0 4px var(--accent-soft);border-radius:50%;margin-top:-6px;transition:transform .15s}.slider input[type=range]::-moz-range-thumb{background:var(--text);border:3px solid var(--accent);border-radius:50%;width:12px;height:12px}.slider input[type=range]:active::-webkit-slider-thumb{transform:scale(1.2)}.slider input[type=range]:focus-visible{outline:none}.slider input[type=range]:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 6px var(--accent-line)}.slider.is-disabled{opacity:.5}.seg-field{gap:8px;display:grid}.seg-field__label{color:var(--text-2);font-size:13px;font-weight:500}.seg{border-radius:var(--r-sm);background:var(--bg-elev);border:1px solid var(--line);flex-wrap:wrap;gap:4px;padding:4px;display:flex}.seg__opt{min-height:32px;color:var(--text-2);border-radius:6px;flex:auto;padding:0 10px;font-size:13px;font-weight:550;transition:background .15s,color .15s}.seg__opt:hover{color:var(--text)}.seg__opt.is-active{background:var(--surface-3);color:var(--text);box-shadow:0 0 0 1px var(--line-2) inset}.seg--sm .seg__opt{min-height:26px;padding:0 8px;font-size:12px}.toggle{cursor:pointer;color:var(--text-2);align-items:center;gap:10px;font-size:13.5px;display:inline-flex}.toggle input{opacity:0;pointer-events:none;position:absolute}.toggle__track{background:var(--surface-3);border:1px solid var(--line-2);border-radius:20px;width:36px;height:20px;transition:background .2s;position:relative}.toggle__thumb{background:var(--text-2);width:14px;height:14px;transition:transform .2s var(--ease), background .2s;border-radius:50%;position:absolute;top:2px;left:2px}.toggle input:checked+.toggle__track{background:var(--accent-soft);border-color:var(--accent-line)}.toggle input:checked+.toggle__track .toggle__thumb{background:var(--accent);transform:translate(16px)}.toggle input:focus-visible+.toggle__track{outline:2px solid var(--accent);outline-offset:2px}.readout-grid{gap:8px;display:grid}.readout-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}.readout-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}.readout-grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}@media (max-width:520px){.readout-grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}}.readout{border-radius:var(--r-sm);background:var(--bg-elev);border:1px solid var(--line);gap:2px;min-width:0;padding:10px 12px;display:grid}.readout__label{font-family:var(--font-mono);letter-spacing:.08em;color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:10.5px;overflow:hidden}.readout__value{font-family:var(--font-mono);color:var(--text);font-variant-numeric:tabular-nums;white-space:nowrap;text-overflow:ellipsis;font-size:18px;font-weight:600;overflow:hidden}.readout__sub{color:var(--muted);font-size:11.5px}.readout--accent .readout__value{color:var(--accent)}.readout--good .readout__value{color:var(--mint)}.readout--bad .readout__value{color:var(--coral)}.readout--warn .readout__value{color:var(--amber)}.readout--violet .readout__value{color:var(--violet)}.readout--muted .readout__value{color:var(--text-2)}.goal-pill{border:1px dashed var(--line-3);color:var(--text-2);border-radius:999px;align-items:center;gap:8px;padding:7px 12px;font-size:13px;font-weight:500;line-height:1.3;display:inline-flex}.goal-pill svg{color:var(--accent);flex:none}.goal-pill.is-done{border-style:solid;border-color:color-mix(in srgb, var(--mint) 45%, transparent);background:var(--mint-soft);color:var(--mint)}.goal-pill.is-done svg{color:var(--mint)}.lab-host{gap:14px;display:grid}.lab-host__bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.lab-host__title{font-family:var(--font-mono);letter-spacing:.08em;color:var(--muted);align-items:center;gap:10px;font-size:12px;display:flex}.lab-host__title b{color:var(--accent);font-weight:500}.lab-host__dot{background:var(--mint);width:7px;height:7px;box-shadow:0 0 10px var(--mint);border-radius:50%}.lab-error{border-radius:var(--r-lg);border:1px solid var(--coral);background:var(--coral-soft);color:var(--text);padding:24px}.code-editor{border-radius:var(--r);border:1px solid var(--line-2);background:var(--bg-elev);font-family:var(--font-mono);grid-template-columns:auto 1fr;font-size:13.5px;line-height:1.65;display:grid;position:relative;overflow:hidden}.code-editor__gutter{text-align:right;color:var(--faint);-webkit-user-select:none;user-select:none;border-right:1px solid var(--line);white-space:pre;padding:14px 10px 14px 14px}.code-editor__area{grid-template-columns:minmax(100%,max-content);min-width:0;display:grid;overflow-x:auto}.code-editor__pre,.code-editor__input{font:inherit;line-height:inherit;white-space:pre;tab-size:2;letter-spacing:0;word-spacing:0;grid-area:1/1;margin:0;padding:14px 16px}.code-editor__pre{pointer-events:none;color:var(--text);min-height:100%}.code-editor__input{resize:none;color:#0000;width:100%;min-width:0;height:100%;caret-color:var(--accent);background:0 0;border:0;outline:none;overflow:hidden}.code-editor__input::selection{background:color-mix(in srgb, var(--accent) 30%, transparent);color:#0000}.tok-kw{color:var(--violet)}.tok-str{color:var(--mint)}.tok-num{color:var(--amber)}.tok-com{color:var(--faint);font-style:italic}.tok-fn{color:var(--accent)}.logo{align-items:center;gap:9px;display:inline-flex}.logo__word{font-family:var(--font-display);letter-spacing:-.03em;color:var(--text);font-size:20px;font-weight:700}.logo__word span{color:var(--text-2);font-weight:400}.beta-pill{border:1px solid var(--accent-line);height:19px;color:var(--accent);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;border-radius:99px;align-items:center;padding:0 7px;font-size:10px;display:inline-flex}.site{flex-direction:column;min-height:100dvh;display:flex}.site-main{padding-top:var(--nav-h);flex:1}.site--landing .site-main{padding-top:0}.site-nav{z-index:100;height:var(--nav-h);transition:background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s;background:color-mix(in srgb, var(--bg) 82%, transparent);-webkit-backdrop-filter:blur(14px)saturate(1.3);backdrop-filter:blur(14px)saturate(1.3);border-bottom:1px solid #0000;border-bottom-color:var(--line);position:fixed;inset:0 0 auto}.site-nav.is-landing:not(.is-scrolled):not(.is-open){-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border-bottom-color:#0000}.site-nav__inner{align-items:center;gap:20px;height:100%;display:flex}.site-nav__brand{flex:none;align-items:center;gap:10px;display:inline-flex}.site-nav__links{align-items:center;gap:2px;margin-left:18px;display:flex}.site-nav__link{white-space:nowrap;color:var(--text-2);border-radius:8px;padding:8px 12px;font-size:14.5px;font-weight:500;transition:color .15s,background .15s;position:relative}.site-nav__link:hover{color:var(--text);background:var(--surface-2)}.site-nav__link.is-active{color:var(--text)}.site-nav__link.is-active:after{content:"";background:var(--accent);border-radius:2px;height:2px;position:absolute;bottom:2px;left:12px;right:12px}.site-nav__actions{align-items:center;gap:8px;margin-left:auto;display:flex}.site-nav__burger{display:none}.search-trigger{border-radius:var(--r-sm);border:1px solid var(--line-2);background:var(--surface);height:34px;color:var(--muted);align-items:center;gap:8px;padding:0 8px 0 12px;font-size:13.5px;transition:border-color .15s;display:inline-flex}.search-trigger:hover{border-color:var(--line-3);color:var(--text-2)}.search-trigger span{text-align:left;min-width:70px}.lang-toggle{border:1px solid var(--line-2);background:var(--surface);border-radius:9px;padding:3px;display:inline-flex}.lang-toggle button{min-width:32px;height:26px;font-family:var(--font-mono);color:var(--muted);border-radius:6px;padding:0 6px;font-size:11.5px;font-weight:600;transition:background .15s,color .15s}.lang-toggle button:hover{color:var(--text)}.lang-toggle button.is-active{background:var(--accent-soft);color:var(--accent)}.mobile-menu{inset:var(--nav-h) 0 0 0;z-index:99;background:var(--bg);border-top:1px solid var(--line);animation:fade-in .2s var(--ease);position:fixed;overflow-y:auto}.mobile-menu[hidden]{display:none}.mobile-menu nav{gap:4px;padding-top:20px;padding-bottom:40px;display:grid}.mobile-menu__link{border-bottom:1px solid var(--line);font-family:var(--font-display);letter-spacing:-.02em;justify-content:space-between;align-items:center;padding:16px 4px;font-size:24px;font-weight:600;display:flex}.mobile-menu__link svg{color:var(--accent)}.mobile-menu__row{align-items:center;gap:10px;margin:20px 0;display:flex}@media (max-width:1120px){.search-trigger span,.search-trigger .kbd{display:none}.search-trigger{justify-content:center;width:36px;padding:0}}@media (max-width:1060px){.site-nav__links{display:none}.site-nav__burger{display:inline-grid}}@media (max-width:640px){.site-nav__actions .lang-toggle,.site-nav__actions>.icon-btn:not(.site-nav__burger),.site-nav__actions .search-trigger{display:none}.site-nav__cta{padding:0 10px}.beta-pill{display:none}}.site-footer{border-top:1px solid var(--line);background:var(--bg);padding:64px 0 28px;position:relative}.site-footer__grid{grid-template-columns:1.6fr repeat(3,1fr);gap:40px;display:grid}.site-footer__brand{align-content:start;gap:14px;max-width:380px;display:grid}.site-footer__brand p{color:var(--text-2);font-size:15px}.site-footer__brand .site-footer__note{color:var(--muted);font-size:13px}.site-footer__h{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:14px;font-size:11.5px;font-weight:500}.site-footer ul{gap:10px;list-style:none;display:grid}.site-footer li a{color:var(--text-2);font-size:14.5px;transition:color .15s}.site-footer li a:hover{color:var(--accent)}.site-footer__bottom{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:16px;margin-top:48px;padding-top:20px;font-size:12px;display:flex}.site-footer__depth{color:var(--accent)}@media (max-width:860px){.site-footer__grid{grid-template-columns:1fr 1fr}.site-footer__brand{grid-column:1/-1}}.page{padding-top:48px;padding-bottom:96px}.page-head{gap:14px;max-width:760px;margin-bottom:36px;display:grid}.page-head h1{font-size:clamp(34px,5vw,54px)}.page-head p{color:var(--text-2);font-size:18px}.back-link{color:var(--muted);align-items:center;gap:6px;font-size:14px;transition:color .15s;display:inline-flex}.back-link:hover{color:var(--accent)}.section-head{gap:14px;max-width:720px;display:grid}.section-head h2{font-size:clamp(32px,4.4vw,52px)}.section-head p{color:var(--text-2);font-size:18px}.section-head--center{text-align:center;justify-items:center;margin-inline:auto}.zone-overlay{z-index:500;background:radial-gradient(circle at 50% 45%, color-mix(in srgb, var(--zc) 22%, #02050b) 0%, #02050b 70%);animation:fade-in .4s var(--ease);color:#e9f2fd;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.zone-overlay__rings{pointer-events:none;place-items:center;display:grid;position:absolute;inset:0}.zone-overlay__rings i{border:1px solid var(--zc);opacity:0;width:240px;height:240px;animation:zone-ring 3.6s var(--ease-out) infinite;border-radius:50%;position:absolute}.zone-overlay__rings i:nth-child(2){animation-delay:1.2s}.zone-overlay__rings i:nth-child(3){animation-delay:2.4s}@keyframes zone-ring{0%{opacity:.8;transform:scale(.4)}to{opacity:0;transform:scale(3.4)}}.zone-overlay__card{text-align:center;animation:fade-up .6s var(--ease-out);justify-items:center;gap:10px;display:grid;position:relative}.zone-overlay__card .eyebrow{color:var(--zc)}.zone-overlay__depth{color:var(--zc);font-size:18px}.zone-overlay__card h2{letter-spacing:-.04em;font-size:clamp(44px,8vw,84px)}.zone-overlay__sci{letter-spacing:.2em;text-transform:uppercase;color:#e9f2fd8c;font-size:13px}.zone-overlay__blurb{color:#e9f2fdcc;max-width:420px;margin:8px 0 18px;font-size:18px}.kai{flex:none;overflow:visible}.kai__body{transform-origin:50% 90%;animation:3.4s ease-in-out infinite kai-bob}.kai__eye{transform-box:fill-box;transform-origin:50%;animation:5s infinite kai-blink}.kai--thinking .kai__body{animation:1.2s ease-in-out infinite kai-think}@keyframes kai-bob{0%,to{transform:translateY(0)scale(1)}50%{transform:translateY(-2.5px)scale(.985,1.015)}}@keyframes kai-think{0%,to{transform:rotate(-3deg)}50%{transform:rotate(3deg)}}@keyframes kai-blink{0%,94%,to{transform:scaleY(1)}97%{transform:scaleY(.1)}}.medal{flex:none;place-items:center;display:inline-grid;position:relative}.medal>svg{position:absolute;inset:0}.medal__hex{fill:hsl(var(--h) 80% 55% / .16);stroke:hsl(var(--h) 85% 62%);stroke-width:1.5px}.medal__inner{fill:hsl(var(--h) 70% 50% / .12);stroke:hsl(var(--h) 85% 62% / .4);stroke-width:1px}.medal__icon{color:hsl(var(--h) 90% 66%);place-items:center;display:grid;position:relative}[data-theme=light] .medal__icon{color:hsl(var(--h) 75% 38%)}[data-theme=light] .medal__hex{stroke:hsl(var(--h) 70% 45%)}.medal.is-locked{filter:grayscale();opacity:.35}@media (max-width:1200px){html[lang=vi] .site-nav__links{display:none}html[lang=vi] .site-nav__burger{display:inline-grid}}.site--landing{background:#03070d}.site--landing .site-footer{z-index:2;position:relative}.landing{isolation:isolate;position:relative;overflow-x:clip}.landing>:not(.ocean-backdrop){z-index:1;position:relative}.ocean-backdrop{pointer-events:none;background:linear-gradient(#06263b 0%,#04101f 30%,#02060c 70%);width:100vw;height:100vh;inset:0;z-index:0!important;position:fixed!important}.glass{-webkit-backdrop-filter:blur(16px)saturate(1.2);backdrop-filter:blur(16px)saturate(1.2);border:1px solid var(--line-2);background:#070d189e}.depth-gauge{right:22px;top:calc(var(--nav-h) + 6vh);pointer-events:none;width:140px;bottom:8vh;z-index:20!important;position:fixed!important}.depth-gauge__track{background:linear-gradient(#5fe3ff80,#c58bff66 70%,#ff8fd04d);width:1px;position:absolute;top:0;bottom:0;right:0}.depth-gauge__tick{position:absolute;right:0}.depth-gauge__tick i{background:#e9f2fd73;width:9px;height:1px;position:absolute;right:-4px}.depth-gauge__marker{background:var(--zc);width:11px;height:11px;box-shadow:0 0 0 4px color-mix(in srgb, var(--zc) 25%, transparent), 0 0 18px var(--zc);transition:top .25s var(--ease-out), background .4s;border-radius:50%;margin-top:-5px;position:absolute;right:-5px}.depth-gauge__read{text-align:right;transition:top .25s var(--ease-out);justify-items:end;gap:1px;margin-top:-18px;display:grid;position:absolute;right:16px}.depth-gauge__read b{color:#e9f2fd;font-variant-numeric:tabular-nums;font-size:13px;font-weight:600}.depth-gauge__read span{color:#e9f2fd8c;white-space:nowrap;font-size:11px}@media (max-width:1240px){.depth-gauge{display:none}}.depth-tag{letter-spacing:.12em;text-transform:uppercase;color:var(--accent);flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;display:inline-flex}.depth-tag i{opacity:.6;background:currentColor;width:16px;height:1px}.depth-tag__zone{color:var(--text-2)}.hero{min-height:100svh;padding:calc(var(--nav-h) + 48px) 0 96px;align-items:center;display:flex;position:relative}.hero__grid{grid-template-columns:minmax(0,1.02fr) minmax(0,1fr);align-items:center;gap:clamp(32px,5vw,72px);display:grid}.hero__eyebrow{border:1px solid var(--accent-line);color:var(--accent);letter-spacing:.06em;background:#38e1ff14;border-radius:99px;align-items:center;gap:10px;margin-bottom:26px;padding:6px 12px 6px 10px;font-size:12px;display:inline-flex}.hero__pulse{background:var(--accent);border-radius:50%;width:7px;height:7px;animation:1.8s infinite pulse-ring}.hero__title{letter-spacing:-.045em;font-size:clamp(44px,6.4vw,90px);font-weight:650;line-height:.98}html[lang=vi] .hero__title{font-size:clamp(40px,5.3vw,76px);line-height:1.04}.hero__grad{background:linear-gradient(100deg,#6ff0ff 0%,#38e1ff 30%,#8a9bff 70%,#c58bff 100%);color:#0000;-webkit-background-clip:text;background-clip:text}.hero__lede{max-width:580px;color:var(--text-2);margin-top:26px;font-size:clamp(17px,1.5vw,19.5px);line-height:1.6}.hero__ctas{flex-wrap:wrap;gap:12px;margin-top:34px;display:flex}.hero__facts{color:var(--muted);flex-wrap:wrap;gap:8px 22px;margin-top:36px;font-size:12.5px;list-style:none;display:flex}.hero__facts b{color:var(--text);margin-right:4px;font-weight:600}.hero__visual{position:relative}.hero__caption{color:var(--muted);text-align:center;margin-top:14px;font-size:13px}.hero__kai{z-index:2;pointer-events:none;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);max-width:270px;box-shadow:var(--shadow-lg);background:#0a1222db;border:1px solid #9d8aff59;border-radius:16px;align-items:center;gap:10px;padding:10px 14px 10px 10px;animation:6s ease-in-out infinite float;display:flex;position:absolute;top:-66px;left:-30px}.hero__kai p{color:var(--text);font-size:13px;line-height:1.4}.hero__kai.hud:before,.hero__kai.hud:after{border-color:var(--violet)}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.hero__scroll{letter-spacing:.18em;text-transform:uppercase;color:#e9f2fd80;justify-items:center;gap:8px;font-size:11px;display:grid;position:absolute;bottom:22px;left:50%;transform:translate(-50%)}.hero__scroll i{background:linear-gradient(var(--accent), transparent);transform-origin:top;width:1px;height:36px;animation:2.2s ease-in-out infinite drip}@keyframes drip{0%{opacity:1;transform:scaleY(0)}60%{opacity:1;transform:scaleY(1)}to{opacity:0;transform:scaleY(1)}}.hero-lab{border-radius:var(--r-xl);-webkit-backdrop-filter:blur(18px)saturate(1.25);backdrop-filter:blur(18px)saturate(1.25);border:1px solid var(--line-2);background:#060c16b8;overflow:hidden;box-shadow:0 40px 120px -30px #000000e6,0 0 80px -30px #38e1ff59}.hero-lab__bar{border-bottom:1px solid var(--line);align-items:center;gap:14px;height:42px;padding:0 14px;font-size:12px;display:flex}.hero-lab__dots{gap:6px;display:flex}.hero-lab__dots i{background:var(--surface-3);border-radius:50%;width:9px;height:9px}.hero-lab__url{color:var(--muted)}.hero-lab__url b{color:var(--accent);font-weight:500}.hero-lab__live{color:var(--mint);text-transform:uppercase;letter-spacing:.1em;align-items:center;gap:7px;margin-left:auto;font-size:11px;display:inline-flex}.hero-lab__live i{background:var(--mint);width:7px;height:7px;box-shadow:0 0 10px var(--mint);border-radius:50%;animation:1.6s infinite blink}.hero-lab__stage{aspect-ratio:1.3;position:relative}.hero-lab__stage canvas{cursor:crosshair;touch-action:manipulation;width:100%;height:100%;position:absolute;inset:0}.hero-lab__hud{color:#e9f2fd99;pointer-events:none;gap:16px;font-size:11px;display:flex;position:absolute;top:12px;left:14px}.hero-lab__hud b{color:#fff;font-weight:600}.hero-lab__foot{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:12px 18px;padding:14px 16px 16px;display:grid}.hero-lab__metric{grid-template-columns:auto 1fr;align-items:baseline;gap:2px 10px;display:grid}.hero-lab__metric span{text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-size:11px}.hero-lab__metric b{color:var(--text);font-variant-numeric:tabular-nums;justify-self:end;font-size:15px}.hero-lab__metric svg,.hero-lab__metric .progress{grid-column:1/-1;width:100%;height:26px}.hero-lab__metric .progress{height:4px;margin-top:11px}.hero-lab__metric path{fill:none;stroke:var(--amber);stroke-width:1.6px;vector-effect:non-scaling-stroke}.hero-lab__controls{grid-column:1/-1;align-items:center;gap:10px;display:flex}.hero-lab__controls .seg{flex:1}.hero-lab__brush{border-radius:var(--r-sm);border:1px solid var(--line);background:var(--bg-elev);gap:4px;padding:4px;display:flex}.hero-lab__brush button{border-radius:6px;place-items:center;width:26px;height:26px;display:grid}.hero-lab__brush button.is-active{background:var(--surface-3);box-shadow:0 0 0 1px var(--line-2) inset}.hero-lab__brush i{border-radius:50%;width:11px;height:11px}@media (max-width:980px){.hero__grid{grid-template-columns:1fr}.hero{padding-top:calc(var(--nav-h) + 32px)}.hero__visual{margin-top:56px}.hero__kai{top:-60px;left:8px}.hero__scroll{display:none}}@media (max-width:520px){.hero__kai{display:none}.hero-lab__foot{grid-template-columns:1fr}}.marquee{border-block:1px solid var(--line);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#03070d59;padding:18px 0;overflow:hidden;-webkit-mask-image:linear-gradient(90deg,#0000,#000 10% 90%,#0000);mask-image:linear-gradient(90deg,#0000,#000 10% 90%,#0000)}.marquee__track{width:max-content;animation:48s linear infinite marquee;display:flex}.marquee__item{font-family:var(--font-display);color:var(--text-2);white-space:nowrap;align-items:center;gap:26px;padding-right:26px;font-size:20px;font-weight:500;display:inline-flex}.marquee__item i{color:var(--accent);font-size:9px;font-style:normal}@keyframes marquee{to{transform:translate(-50%)}}.l-section{padding:clamp(80px,11vw,140px) 0}.l-section .section-head{margin-bottom:52px}.ticks{gap:10px;margin:6px 0 10px;list-style:none;display:grid}.ticks li{color:var(--text);align-items:center;gap:10px;font-size:15.5px;display:flex}.ticks svg{color:var(--accent);flex:none}.center-row{justify-content:center;margin-top:40px;display:flex}.loop{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:clamp(28px,5vw,72px);display:grid}.loop__ring{aspect-ratio:1;width:min(100%,440px);margin-inline:auto;position:relative}.loop__ring>svg{width:100%;height:100%;position:absolute;inset:0;transform:rotate(-90deg)}.loop__track{fill:none;stroke:var(--line-2);stroke-width:1.5px;stroke-dasharray:3 7}.loop__progress{fill:none;stroke-width:3px;stroke-linecap:round;stroke-dasharray:942.5;stroke-dashoffset:calc(942.5 - 942.5 * (var(--a) + 1) / 4);transition:stroke-dashoffset .8s var(--ease-out);filter:drop-shadow(0 0 6px #38e1ff99)}.loop__inner{fill:#070d188c;stroke:var(--line)}.loop__center{place-content:center;justify-items:center;gap:8px;display:grid;position:absolute;inset:0}.loop__center span{letter-spacing:.16em;text-transform:uppercase;color:var(--muted);font-size:11px}.loop__node{border:1px solid var(--line-2);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);width:104px;color:var(--text-2);font-family:var(--font-display);transition:border-color .25s, color .25s, box-shadow .25s, transform .25s var(--ease-out);background:#070d18d9;border-radius:18px;justify-items:center;gap:6px;padding:12px 8px;font-size:15px;font-weight:600;display:grid;position:absolute;transform:translate(-50%,-50%)}.loop__node:hover{color:var(--text);border-color:var(--line-3)}.loop__node.is-active{color:var(--accent);border-color:var(--accent-line);box-shadow:var(--glow);transform:translate(-50%,-50%)scale(1.06)}.loop__node--0{top:15.9%;left:50%}.loop__node--1{top:50%;left:84.1%}.loop__node--2{top:84.1%;left:50%}.loop__node--3{top:50%;left:15.9%}.loop__panel{border-radius:var(--r-xl);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--line-2);animation:fade-up .45s var(--ease-out);background:#070d18a8;gap:14px;padding:28px;display:grid}.loop__step{letter-spacing:.1em;text-transform:uppercase;color:var(--accent);font-size:12px}.loop__panel h3{font-size:clamp(24px,2.6vw,32px)}.loop__body{color:var(--text-2);font-size:16.5px}.loop__cite{color:var(--muted);align-items:center;gap:8px;font-size:12px;display:flex}.loop__cite svg{color:var(--violet)}.mock{border-radius:var(--r);border:1px solid var(--line);background:#03070d8c;padding:16px}.mock__row{color:var(--text-2);justify-content:space-between;font-size:13px;display:flex}.mock__slider{background:var(--surface-3);border-radius:4px;height:4px;margin:12px 0 14px;position:relative}.mock__slider i{border-radius:inherit;background:var(--accent);position:absolute;inset:0 auto 0 0}.mock__slider i:after{content:"";border:3px solid var(--accent);background:#fff;border-radius:50%;width:16px;height:16px;position:absolute;top:-6px;right:-7px}.mock__chips{flex-wrap:wrap;gap:6px;display:flex}.mock--teach{gap:10px;display:grid}.mock--teach .bubble{max-width:100%;animation:none}.mock--teach .bubble__text{font-size:13.5px}.mock--quiz{gap:8px;display:grid}.mock--quiz p{font-size:14.5px;font-weight:600}.mock__opt{border:1px solid var(--line-2);border-radius:10px;align-items:center;gap:10px;padding:9px 12px;font-size:14px;display:flex}.mock__opt span{color:var(--muted);font-size:12px}.mock__opt.is-right{border-color:color-mix(in srgb, var(--mint) 55%, transparent);background:var(--mint-soft)}.mock__opt.is-right svg{color:var(--mint);margin-left:auto}.mock--tide{align-items:flex-end;gap:8px;height:116px;display:flex}.mock__card{height:calc(30% + var(--i) * 17%);border:1px solid var(--accent-line);color:var(--text);animation:fade-up .5s var(--ease-out) backwards;animation-delay:calc(var(--i) * 80ms);background:linear-gradient(#38e1ff38,#9d8aff14);border-radius:10px;flex:1;place-items:end center;padding-bottom:8px;font-size:12px;display:grid}@media (max-width:900px){.loop{grid-template-columns:1fr}}.teach-section{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:center;gap:clamp(28px,5vw,64px);display:grid}.teach-section .section-head{margin-bottom:0}.teach-demo{gap:14px;display:grid}.teach-demo__chat{border-radius:var(--r-xl);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border:1px solid var(--line-2);box-shadow:var(--shadow-lg);background:#070d18b8;display:grid}.teach-demo__chat.hud:before,.teach-demo__chat.hud:after{border-color:var(--violet)}.teach-demo__head{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:16px 18px;display:flex}.teach-demo__name{font-family:var(--font-display);font-size:17px;font-weight:600}.teach-demo__role{color:var(--violet);letter-spacing:.06em;font-size:11px}.teach-demo__meter{gap:5px;margin-left:auto;display:flex}.teach-demo__meter i{background:var(--surface-3);border-radius:6px;width:18px;height:6px;transition:background .4s}.teach-demo__meter i.is-on{background:var(--violet);box-shadow:0 0 10px var(--violet)}.teach-demo__log{flex-direction:column;gap:12px;height:300px;padding:18px;display:flex;overflow-y:auto}.teach-demo__log .bubble__text{font-size:14.5px}.teach-demo__score{background:var(--violet-soft);border:1px solid color-mix(in srgb, var(--violet) 40%, transparent);color:var(--text);border-radius:12px;flex-wrap:wrap;align-items:center;gap:8px;padding:10px 14px;font-size:14px;display:flex}.teach-demo__score svg{color:var(--violet)}.teach-demo__form{gap:10px;padding:0 18px 18px;display:grid}.teach-demo__form .textarea{background:#03070d99;min-height:84px}.teach-demo__actions{justify-content:space-between;gap:8px;display:flex}.teach-demo__rubric{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;list-style:none;display:grid}.teach-demo__rubric li{border:1px dashed var(--line-2);color:var(--faint);background:#070d1880;border-radius:12px;align-items:center;gap:10px;padding:10px 12px;font-size:13.5px;transition:border-color .3s,color .3s,background .3s;display:flex}.teach-demo__rubric li span{color:var(--muted);font-size:11px}.teach-demo__rubric li.is-on{border-style:solid;border-color:color-mix(in srgb, var(--violet) 50%, transparent);background:var(--violet-soft);color:var(--text)}.teach-demo__rubric li.is-on svg{color:var(--violet);margin-left:auto}@media (max-width:980px){.teach-section{grid-template-columns:1fr}}.zones__grid{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);align-items:start;gap:28px;display:grid}.zones__column{border-left:1px solid var(--line-2);list-style:none;display:grid}.zones__column li{border-bottom:1px solid var(--line);grid-template-columns:110px 1fr;gap:16px;padding:18px 0 18px 22px;display:grid;position:relative}.zones__column li:before{content:"";background:var(--zc);width:9px;height:9px;box-shadow:0 0 14px var(--zc);border-radius:50%;position:absolute;top:26px;left:-5px}.zones__depth{color:var(--zc);padding-top:4px;font-size:13px}.zones__column h3{font-size:21px}.zones__sci{letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:2px 0 6px;font-size:11px}.zones__column p:last-child{color:var(--text-2);font-size:15px}.zones__ladder{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-color:var(--line-2);background:#070d18b3;gap:16px;padding:24px;display:grid}.ladder__row{grid-template-columns:48px 1fr;align-items:center;gap:14px;display:grid}.ladder__bar{flex-direction:column-reverse;gap:3px;display:flex}.ladder__bar i{background:var(--surface-3);border-radius:3px;height:6px}.ladder__bar i.is-on{background:linear-gradient(90deg, var(--accent), var(--violet))}.ladder__row b{font-family:var(--font-display);font-size:16px}.ladder__row p{color:var(--text-2);font-size:14px}.zones__note{border-top:1px solid var(--line);color:var(--muted);padding-top:14px;font-size:14px}@media (max-width:900px){.zones__grid{grid-template-columns:1fr}.zones__column li{grid-template-columns:1fr;gap:4px}}.bento{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.bento__tile{border-radius:var(--r-xl);border:1px solid var(--line-2);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:border-color .25s, transform .3s var(--ease-out), box-shadow .3s;background:#070d18a8;grid-template-rows:auto 1fr;display:grid;position:relative;overflow:hidden}.bento__tile:hover{border-color:var(--accent-line);transform:translateY(-3px);box-shadow:0 30px 80px -40px #38e1ff73}.bento__tile--wide{grid-column:span 2}.bento__viz{border-bottom:1px solid var(--line);background-image:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);background-size:24px 24px;height:190px;position:relative}.mini-viz{width:100%;height:100%;position:absolute;inset:0}.bento__meta{align-content:start;gap:6px;padding:18px 20px 20px;display:grid}.bento__id{color:var(--accent);font-size:11px}.bento__meta h3{font-size:19px}.bento__meta p{color:var(--text-2);font-size:14.5px}.bento__arrow{color:var(--text-2);transition:color .2s,transform .2s;position:absolute;top:14px;right:14px}.bento__tile:hover .bento__arrow{color:var(--accent);transform:translate(2px,-2px)}@media (max-width:960px){.bento{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:620px){.bento{grid-template-columns:1fr}.bento__tile--wide{grid-column:auto}}.course-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;display:grid}.course-card{border-radius:var(--r-xl);border:1px solid var(--line-2);background:var(--surface);transition:border-color .25s, transform .3s var(--ease-out);grid-template-rows:auto 1fr;display:grid;overflow:hidden}.landing .course-card{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#070d18b3}.course-card:hover{border-color:var(--accent-line);transform:translateY(-3px)}.course-card__cover{aspect-ratio:5/3;position:relative;overflow:hidden}.course-card__cover .cover{width:100%;height:100%;transition:transform .6s var(--ease-out)}.course-card:hover .cover{transform:scale(1.04)}.course-card__level{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:absolute;top:12px;left:12px}.course-card__body{align-content:start;gap:8px;padding:18px;display:grid}.course-card__body h3{font-size:19px}.course-card__body p{color:var(--text-2);font-size:14.5px}.course-card__meta{color:var(--muted);flex-wrap:wrap;gap:6px;margin-top:6px;font-size:11.5px;display:flex}@media (max-width:1100px){.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:600px){.course-grid{grid-template-columns:1fr}}.soon-row{flex-wrap:wrap;align-items:center;gap:12px 18px;margin-top:28px;display:flex}.soon-row__list{flex-wrap:wrap;gap:8px;display:flex}.soon-pill{border:1px dashed var(--line-3);height:34px;color:var(--text-2);border-radius:99px;align-items:center;gap:7px;padding:0 14px;font-size:13.5px;transition:border-color .2s,color .2s;display:inline-flex}.soon-pill:hover{color:var(--text);border-color:var(--accent-line)}.science-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.science-card{border-radius:var(--r-xl);border:1px solid var(--line-2);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#070d18b3;align-content:start;gap:10px;padding:24px;display:grid}.science-card__n{color:var(--violet);font-size:12px}.science-card h3{font-size:20px}.science-card p{color:var(--text-2);font-size:14.5px}.science-card__src{border-top:1px solid var(--line);padding-top:10px;color:var(--muted)!important;font-size:11.5px!important}.science-card__use{font-weight:600;color:var(--accent)!important}@media (max-width:1000px){.science-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:620px){.science-grid{grid-template-columns:1fr}}.schools-teaser{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:clamp(28px,5vw,64px);display:grid}.schools-teaser .section-head{margin-bottom:0}.schools-teaser .btn{justify-self:start;margin-top:10px}.class-mock{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-color:var(--line-2);background:#070d18bf;gap:16px;padding:22px;display:grid}.class-mock__head{justify-content:space-between;align-items:start;gap:10px;display:flex}.class-mock__head h3{margin-top:4px;font-size:18px}.class-mock__table{border-collapse:separate;border-spacing:5px;width:100%;font-size:13.5px}.class-mock__table th{color:var(--text-2);text-align:left;font-weight:500}.class-mock__table thead th{color:var(--muted);text-align:center;font-size:11px}.class-mock__table td{padding:0}.lv{background:var(--surface-3);border-radius:6px;height:22px;display:block}.lv--1{background:#38e1ff2e}.lv--2{background:#38e1ff61}.lv--3{background:#38e1ffa6}.lv--4{background:linear-gradient(90deg,#38e1ff,#9d8aff)}.class-mock__insight{background:var(--amber-soft);border:1px solid color-mix(in srgb, var(--amber) 35%, transparent);border-radius:12px;align-items:center;gap:10px;padding:12px;font-size:13.5px;display:flex}@media (max-width:960px){.schools-teaser{grid-template-columns:1fr}}.mini-plans{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;max-width:1040px;margin-inline:auto;display:grid}.mini-plan{border-radius:var(--r-xl);border:1px solid var(--line-2);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#070d18b3;align-content:start;gap:12px;padding:26px;display:grid}.mini-plan.is-featured{border-color:var(--accent-line);box-shadow:var(--glow)}.mini-plan__name{letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-size:12px}.mini-plan__price .stat-num{font-size:34px}.mini-plan__price small{color:var(--muted);font-size:12.5px;display:block}.mini-plan ul{border-top:1px solid var(--line);gap:8px;padding-top:12px;list-style:none;display:grid}.mini-plan li{color:var(--text-2);gap:8px;font-size:14.5px;display:flex}.mini-plan li svg{color:var(--mint);flex:none;margin-top:4px}@media (max-width:860px){.mini-plans{grid-template-columns:1fr}}.faq{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-items:start;gap:40px;display:grid}.faq__list{gap:10px;display:grid}.faq__item{border-radius:var(--r-lg);border:1px solid var(--line-2);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#070d18b3;transition:border-color .2s}.faq__item[open]{border-color:var(--accent-line)}.faq__item summary{cursor:pointer;justify-content:space-between;align-items:center;gap:16px;padding:18px 20px;font-size:16px;font-weight:600;list-style:none;display:flex}.faq__item summary::-webkit-details-marker{display:none}.faq__item summary svg{color:var(--accent);transition:transform .25s var(--ease);flex:none}.faq__item[open] summary svg{transform:rotate(45deg)}.faq__item p{color:var(--text-2);padding:0 20px 20px;font-size:15px}@media (max-width:900px){.faq{grid-template-columns:1fr}}.final-cta{text-align:center;padding:clamp(100px,14vw,180px) 0}.final-cta__inner{justify-items:center;gap:16px;display:grid}.final-cta__depth{letter-spacing:.14em;color:#ff8fd0;font-size:12.5px}.final-cta h2{max-width:820px;font-size:clamp(34px,5vw,64px)}.final-cta__q{font-family:var(--font-display);background:linear-gradient(100deg,#38e1ff,#c58bff);color:#0000;-webkit-background-clip:text;background-clip:text;font-size:clamp(24px,3vw,36px);font-weight:600}.final-cta .hero__ctas{justify-content:center}.final-cta__perks{color:var(--muted);flex-wrap:wrap;justify-content:center;gap:18px;margin-top:18px;font-size:12px;list-style:none;display:flex}.final-cta__perks li{align-items:center;gap:6px;display:inline-flex}.sandbox{gap:24px;padding-top:32px;padding-bottom:96px;display:grid}.sandbox__head{gap:18px;display:grid}.sandbox__title{gap:10px;display:grid}.sandbox__title h1{font-size:clamp(32px,4.4vw,48px)}.sandbox__title p{max-width:720px;font-size:17px}.sandbox__foot{grid-template-columns:1.3fr 1fr .8fr;gap:14px;display:grid}.sandbox__challenges ul{gap:8px;margin-top:12px;list-style:none;display:grid}.sandbox__challenges li{color:var(--text-2);align-items:center;gap:10px;font-size:14.5px;display:flex}.sandbox__challenges li svg{color:var(--accent);flex:none}.sandbox__challenges li.is-done svg{color:var(--mint)}.sandbox__challenges li .chip{margin-left:auto}.sandbox__lesson{align-content:start;gap:8px;display:grid}.sandbox__lesson .btn{justify-self:start;margin-top:6px}.sandbox__next{align-content:start;gap:6px;display:grid}.sandbox__next svg{color:var(--accent)}@media (max-width:900px){.sandbox__foot{grid-template-columns:1fr}}.page-head--center{text-align:center;justify-items:center;margin-inline:auto}.catalog__bar{flex-wrap:wrap;gap:10px;margin-bottom:14px;display:flex}.catalog__search{flex:320px;align-items:center;display:flex;position:relative}.catalog__search>svg{color:var(--muted);pointer-events:none;position:absolute;left:14px}.catalog__search .input{padding-left:42px;padding-right:40px}.catalog__search .icon-btn{position:absolute;right:4px}.catalog__select{width:auto;min-width:170px}.select{appearance:none;background-image:linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);cursor:pointer;background-position:calc(100% - 18px) 52%,calc(100% - 13px) 52%;background-repeat:no-repeat;background-size:5px 5px;padding-right:36px}.catalog__chips{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px;display:flex}.catalog__live{color:var(--text-2);cursor:pointer;align-items:center;gap:8px;margin-left:auto;font-size:14px;display:inline-flex}.catalog__live input{accent-color:var(--accent);width:16px;height:16px}.catalog__count{color:var(--muted);margin-bottom:12px;font-size:12px}.course-grid--catalog,.course-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}@media (max-width:1000px){.course-grid--catalog,.course-grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:620px){.course-grid--catalog,.course-grid--3{grid-template-columns:1fr}}.course-card__soon{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#e9f2fd;background:#03070d99;border-color:#fff3;position:absolute;top:12px;right:12px}.course-card__meta span{align-items:center;gap:4px;display:inline-flex}.course-card__progress{align-items:center;gap:10px;margin-top:6px;display:flex}.course-card__progress .progress{flex:1}.course-card__progress span{color:var(--accent);font-size:11px}.course-hero{border-bottom:1px solid var(--line);padding:34px 0 54px;position:relative;overflow:hidden}.course-hero__art{opacity:.55;position:absolute;inset:0;-webkit-mask-image:linear-gradient(90deg,#0000 0%,#000 55%);mask-image:linear-gradient(90deg,#0000 0%,#000 55%)}.course-hero__art svg{width:100%;height:100%}[data-theme=light] .course-hero{color:#e9f2fd;--text:#e9f2fd;--text-2:#aebed6;--muted:#8597b3;background:#061424}.course-hero:after{content:"";background:linear-gradient(90deg, var(--bg) 18%, color-mix(in srgb, var(--bg) 70%, transparent) 50%, transparent 100%);pointer-events:none;position:absolute;inset:0}[data-theme=light] .course-hero:after{background:linear-gradient(90deg,#061424 18%,#061424b3 50%,#0000 100%)}.course-hero__inner{z-index:1;justify-items:start;gap:16px;display:grid;position:relative}.course-hero__chips{flex-wrap:wrap;gap:8px;margin-top:18px;display:flex}.course-hero h1{max-width:800px;font-size:clamp(36px,5.4vw,64px)}.course-hero__tagline{max-width:640px;color:var(--text-2);font-size:19px}.course-hero__meta{color:var(--text-2);flex-wrap:wrap;gap:8px 20px;font-size:13px;list-style:none;display:flex}.course-hero__meta li{align-items:center;gap:6px;display:inline-flex}.course-hero__ctas{flex-wrap:wrap;gap:10px;margin-top:8px;display:flex}.course-body{grid-template-columns:minmax(0,1fr) 340px;align-items:start;gap:32px;padding-top:40px;padding-bottom:96px;display:grid}.course-main{gap:40px;min-width:0;display:grid}.course-h2{margin-bottom:16px;font-size:24px}.outcomes{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;list-style:none;display:grid}.outcomes li{border-radius:var(--r);border:1px solid var(--line);background:var(--surface);gap:10px;padding:14px;font-size:15px;display:flex}.outcomes svg{color:var(--mint);flex:none;margin-top:4px}.syllabus{gap:10px;list-style:none;display:grid}.syllabus__row{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);transition:border-color .2s, transform .2s var(--ease-out);grid-template-columns:44px 1fr auto;align-items:start;gap:16px;padding:18px;display:grid}a.syllabus__row:hover{border-color:var(--accent-line);transform:translate(3px)}.syllabus__row.is-locked{opacity:.75}.syllabus__n{border:1px solid var(--line-2);width:42px;height:42px;color:var(--muted);border-radius:12px;place-items:center;font-size:13px;display:grid}.syllabus__n.lv-1{border-color:var(--accent-line);color:var(--accent)}.syllabus__n.lv-2{background:var(--mint-soft);border-color:color-mix(in srgb, var(--mint) 45%, transparent);color:var(--mint)}.syllabus__n.lv-3,.syllabus__n.lv-4{background:var(--violet-soft);border-color:color-mix(in srgb, var(--violet) 45%, transparent);color:var(--violet)}.syllabus__text h3{font-size:18px}.syllabus__text p{color:var(--text-2);margin-top:4px;font-size:14.5px}.syllabus__steps{flex-wrap:wrap;gap:6px;margin-top:10px;display:flex}.syllabus__step{border:1px solid var(--line);height:24px;color:var(--muted);border-radius:7px;align-items:center;gap:5px;padding:0 8px;font-size:12px;display:inline-flex}.syllabus__step.is-lab{color:var(--accent);border-color:var(--accent-line)}.syllabus__step.is-teach{color:var(--violet)}.syllabus__step.is-code{color:var(--mint)}.syllabus__side{color:var(--muted);justify-items:end;gap:6px;font-size:12px;display:grid}.syllabus__pct{color:var(--accent)}.glossary-chips{flex-wrap:wrap;gap:8px;display:flex}.course-side{top:calc(var(--nav-h) + 20px);gap:14px;display:grid;position:sticky}.course-side__progress{align-items:center;gap:16px;display:flex}.course-side__big{font-family:var(--font-display);font-size:22px;font-weight:600}.course-side__progress .muted{font-size:13px}.side-labs{gap:4px;margin-top:10px;list-style:none;display:grid}.side-labs a{color:var(--text-2);border-radius:9px;align-items:center;gap:8px;padding:8px 10px;font-size:14px;display:flex}.side-labs a:hover{background:var(--surface-2);color:var(--text)}.side-labs a>svg:first-child{color:var(--accent)}.side-labs__ok{color:var(--mint);margin-left:auto}.course-side__how ul{color:var(--text-2);gap:8px;margin-top:10px;font-size:14px;list-style:none;display:grid}.course-side__how li{align-items:center;gap:8px;display:flex}.course-side__how svg{color:var(--accent)}@media (max-width:960px){.course-body{grid-template-columns:1fr}.course-side{position:static}.outcomes{grid-template-columns:1fr}}.ring{flex:none;position:relative}.ring svg{transform:rotate(-90deg)}.ring__track{fill:none;stroke:var(--surface-3);stroke-width:7px}.ring__value{fill:none;stroke:var(--accent);stroke-width:7px;stroke-linecap:round;transition:stroke-dashoffset .8s var(--ease-out)}.ring__label{text-align:center;place-content:center;display:grid;position:absolute;inset:0}.ring__label b{font-size:20px}.ring__label small{color:var(--muted);font-size:10.5px}.lab-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.lab-card{border-radius:var(--r-xl);border:1px solid var(--line-2);background:var(--surface);transition:border-color .2s, transform .25s var(--ease-out);grid-template-rows:auto 1fr;display:grid;position:relative;overflow:hidden}.lab-card:hover{border-color:var(--accent-line);transform:translateY(-3px)}.lab-card__art{aspect-ratio:16/7;position:relative}.lab-card__art svg{width:100%;height:100%}.lab-card__id{color:#e9f2fd;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#03070d8c;border-radius:6px;padding:3px 8px;font-size:11px;position:absolute;bottom:10px;left:14px}.lab-card__seen{color:#e9f2fd;background:#03070d8c;border-color:#fff3;position:absolute;top:12px;right:12px}.lab-card__body{align-content:start;gap:8px;padding:18px;display:grid}.lab-card__body h2{font-size:19px}.lab-card__body p{color:var(--text-2);font-size:14.5px}.lab-card__foot{justify-content:space-between;align-items:center;gap:10px;margin-top:6px;font-size:12.5px;display:flex}.lab-card__arrow{color:#e9f2fd;opacity:0;transition:opacity .2s;position:absolute;top:14px;right:14px}.lab-card:hover .lab-card__arrow{opacity:1}@media (max-width:1000px){.lab-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:620px){.lab-grid{grid-template-columns:1fr}}.start{min-height:calc(100dvh - var(--nav-h));padding:40px var(--gutter) 80px;background:radial-gradient(800px 400px at 50% 0%, var(--accent-soft), transparent 70%), var(--bg);place-items:center;display:grid}.start__card{width:min(640px,100%);padding:28px}.start__top{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.start__steps{gap:6px;display:flex}.start__steps i{background:var(--surface-3);border-radius:5px;width:38px;height:5px}.start__steps i.is-on{background:var(--accent)}.start__body{text-align:center;justify-items:center;gap:14px;padding:16px 0 6px;display:grid}.start__body h1{font-size:clamp(26px,4vw,34px)}.start__body>p{max-width:460px}.start__input{text-align:center;max-width:380px;font-size:18px}.start__or{text-align:center;width:100%;color:var(--muted);font-size:12px;position:relative}.start__or:before{content:"";background:var(--line);height:1px;position:absolute;top:50%;left:0;right:0}.start__or span{background:var(--surface);padding:0 12px;position:relative}.start__existing{border-radius:var(--r);background:var(--accent-soft);border:1px solid var(--accent-line);align-items:center;gap:12px;padding:12px 14px;display:flex}.start__existing p{flex:1;font-size:14.5px}.start__interests{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;width:100%;display:grid}.start__interest{border-radius:var(--r);border:1px solid var(--line-2);background:var(--bg-elev);text-align:left;align-items:center;gap:12px;padding:16px;font-weight:550;transition:border-color .15s,background .15s;display:flex;position:relative}.start__interest svg{color:var(--accent);flex:none}.start__interest.is-on{border-color:var(--accent-line);background:var(--accent-soft)}.start__tick{margin-left:auto}.start__goals{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;width:100%;display:grid}.start__goal{border-radius:var(--r);border:1px solid var(--line-2);background:var(--bg-elev);gap:4px;padding:16px 10px;display:grid}.start__goal b{font-family:var(--font-display);font-size:17px}.start__goal span{color:var(--accent);font-size:12px}.start__goal small{color:var(--muted)}.start__goal.is-on{border-color:var(--accent-line);background:var(--accent-soft);box-shadow:var(--glow)}.start__nav{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;width:100%;margin-top:8px;display:flex}@media (max-width:560px){.start__interests,.start__goals{grid-template-columns:1fr}}.app{grid-template-columns:248px minmax(0,1fr);min-height:100dvh;display:grid}.app-side{border-right:1px solid var(--line);background:var(--bg-elev);flex-direction:column;gap:18px;height:100dvh;padding:18px 14px;display:flex;position:sticky;top:0}.app-side__brand{padding:4px 8px 10px}.app-side__nav{gap:2px;display:grid}.app-side__link{color:var(--text-2);border-radius:10px;align-items:center;gap:12px;padding:10px 12px;font-size:14.5px;font-weight:500;transition:background .15s,color .15s;display:flex}.app-side__link:hover{background:var(--surface-2);color:var(--text)}.app-side__link.is-active{background:var(--accent-soft);color:var(--accent)}.app-side__badge{background:var(--amber);color:#1a1000;border-radius:10px;place-items:center;min-width:22px;height:20px;margin-left:auto;padding:0 6px;font-size:11px;display:grid}.app-side__depth{border-radius:var(--r);border:1px solid var(--line-2);background:linear-gradient(160deg, color-mix(in srgb, var(--zc) 14%, transparent), transparent 70%), var(--surface);gap:4px;margin-top:auto;padding:14px;display:grid}.app-side__depth b{color:var(--text);font-size:20px}.app-side__zone{color:var(--zc);margin-bottom:6px;font-size:13px}.app-main{flex-direction:column;min-width:0;display:flex}.app-top{z-index:30;border-bottom:1px solid var(--line);background:color-mix(in srgb, var(--bg) 85%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);align-items:center;gap:14px;height:64px;padding:0 clamp(16px,3vw,32px);display:flex;position:sticky;top:0}.app-top__search{flex:0 380px}.app-top__search span{flex:1}.app-top__right{align-items:center;gap:10px;margin-left:auto;display:flex}.streak{border:1px solid var(--line-2);height:34px;color:var(--muted);border-radius:99px;align-items:center;gap:5px;padding:0 11px;display:inline-flex}.streak.is-lit{color:var(--amber);border-color:color-mix(in srgb, var(--amber) 40%, transparent);background:var(--amber-soft)}.goal-mini{align-items:center;gap:6px;font-size:12.5px;display:inline-flex}.goal-mini svg{width:30px;height:30px;transform:rotate(-90deg)}.goal-mini__track{fill:none;stroke:var(--surface-3);stroke-width:4px}.goal-mini__val{fill:none;stroke:var(--mint);stroke-width:4px;stroke-linecap:round;transition:stroke-dashoffset .6s var(--ease-out)}.goal-mini small{color:var(--muted)}.demo-banner{color:var(--text);background:var(--violet-soft);border-bottom:1px solid color-mix(in srgb, var(--violet) 30%, transparent);padding:9px clamp(16px,3vw,32px);font-size:13px}.demo-banner a{color:var(--violet);text-decoration:underline}.app-content{flex:1;width:100%;max-width:1320px;padding:clamp(20px,3vw,36px) clamp(16px,3vw,36px) 96px}.app-content .page-head{margin-bottom:24px}.app-content .page-head h1{font-size:clamp(30px,4vw,44px)}.app-tabs{display:none}@media (max-width:1100px){.goal-mini small,.app-top .lang-toggle{display:none}}@media (max-width:900px){.app{grid-template-columns:1fr}.app-side{display:none}.app-tabs{z-index:60;padding:6px 6px calc(6px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:color-mix(in srgb, var(--bg) 92%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);grid-template-columns:repeat(5,1fr);display:grid;position:fixed;inset:auto 0 0}.app-tabs__link{color:var(--muted);border-radius:10px;justify-items:center;gap:3px;padding:6px 0;font-size:10.5px;display:grid;position:relative}.app-tabs__link.is-active{color:var(--accent)}.app-tabs__dot{background:var(--amber);border-radius:50%;width:7px;height:7px;position:absolute;top:4px;left:calc(50% + 8px)}.app-top__search span,.app-top__search .kbd{display:none}.app-top__search{flex:none;justify-content:center;width:36px;padding:0}.toasts{bottom:80px}}.panel{border-radius:var(--r-lg);padding:20px}.panel__head{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px;display:flex}.panel__title{align-items:center;gap:8px;font-size:17px;display:flex}.panel__head .muted{font-size:13px}.tile{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);color:var(--text);align-content:start;gap:6px;padding:20px;display:grid}a.tile{transition:border-color .2s}a.tile:hover{border-color:var(--accent-line)}.tile__label{color:var(--text-2);font-size:13px;font-weight:600}.tile__hero{align-items:center;gap:8px;font-size:40px;line-height:1.05;display:flex}.tile__sub{color:var(--text-2);font-size:14px}.tile__foot{font-size:12.5px}.tile__link{color:var(--accent);align-items:center;gap:6px;margin-top:4px;font-size:13px;font-weight:600;display:inline-flex}.tile--depth{background:linear-gradient(160deg, color-mix(in srgb, var(--zc) 16%, transparent), transparent 65%), var(--surface)}.tile--depth .tile__sub{color:var(--zc)}.tile--tide .tile__hero{color:var(--amber)}.streak-icon{color:var(--muted)}.streak-icon.is-lit{color:var(--amber)}.goal-bar{gap:6px;margin-top:6px;display:grid}.goal-bar__head{color:var(--text-2);justify-content:space-between;font-size:12.5px;display:flex}.goal-bar__head span:first-child{align-items:center;gap:5px;display:inline-flex}.dash{gap:28px;display:grid}.dash__head h1{margin:8px 0;font-size:clamp(30px,4vw,44px)}.dash__head .text-2{max-width:640px}.dash__grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;display:grid}.dash-continue{border-radius:var(--r-xl);border:1px solid var(--line-2);background:var(--surface);grid-area:span 2/span 2;grid-template-rows:150px 1fr;transition:border-color .2s;display:grid;overflow:hidden}.dash-continue:hover{border-color:var(--accent-line)}.dash-continue__art svg{width:100%;height:100%}.dash-continue__body{align-content:start;gap:8px;padding:20px;display:grid}.dash-continue__body h2{font-size:26px}.dash-continue__progress{align-items:center;gap:10px;margin:6px 0 8px;display:flex}.dash-continue__progress .progress{flex:1}.dash-continue__progress span{color:var(--muted);font-size:12px}.dash-continue__btn{justify-self:start}.dash-continue--done{grid-template-rows:auto;align-content:center}.dash__chart,.dash__heat{grid-column:span 2}.dash__kai{background:linear-gradient(120deg, var(--violet-soft), transparent 60%), var(--surface);grid-column:span 2;align-items:center;gap:16px;display:flex}.dash__kai-q{font-family:var(--font-display);margin-top:4px;font-size:18px;font-weight:500}.dash__badges{grid-column:span 2}.badge-row{flex-wrap:wrap;gap:18px;list-style:none;display:flex}.badge-row li{text-align:center;width:84px;color:var(--text-2);justify-items:center;gap:6px;font-size:12px;display:grid}.dash__section{gap:14px;display:grid}.dash__h2{font-size:22px}.dash__fine{font-size:12.5px}@media (max-width:1180px){.dash__grid{grid-template-columns:repeat(2,minmax(0,1fr))}.dash-continue{grid-row:auto}}@media (max-width:640px){.dash__grid{grid-template-columns:1fr}.dash-continue,.dash__chart,.dash__heat,.dash__kai,.dash__badges{grid-column:auto}}.colchart{padding:0 0 22px 34px;position:relative}.colchart__grid{pointer-events:none;position:absolute;inset:0 0 22px 34px}.colchart__gridline{background:var(--line);height:1px;position:absolute;left:0;right:0}.colchart__gridline span{color:var(--muted);font-size:10.5px;position:absolute;top:-7px;right:calc(100% + 8px)}.colchart__plot{align-items:flex-end;height:100%;display:flex;position:relative}.colchart__slot{cursor:default;outline:none;justify-content:center;align-items:flex-end;height:100%;display:flex;position:relative}.colchart__bar{background:color-mix(in srgb, var(--accent) 55%, var(--surface));width:min(24px,60%);transition:height .6s var(--ease-out), background .15s;border-radius:4px 4px 0 0}.colchart__slot.is-active .colchart__bar{background:var(--accent)}.colchart__slot:focus-visible .colchart__bar{outline:2px solid var(--accent);outline-offset:2px}.colchart__label{color:var(--muted);font-size:10.5px;position:absolute;bottom:-20px}.colchart__tip{z-index:2;background:var(--text);color:var(--bg);white-space:nowrap;pointer-events:none;border-radius:8px;justify-items:center;padding:5px 9px;font-size:11px;display:grid;position:absolute}.colchart__tip b{font-size:13px}.heatmap{gap:10px;display:grid}.heatmap__grid{gap:3px;display:flex}.heatmap__col{flex:1;gap:3px;display:grid}.heatmap__cell{aspect-ratio:1;border-radius:3px;min-width:8px;display:block}.hm-0{background:var(--surface-3)}.hm-1{background:color-mix(in srgb, var(--accent) 25%, var(--surface-3))}.hm-2{background:color-mix(in srgb, var(--accent) 48%, var(--surface-3))}.hm-3{background:color-mix(in srgb, var(--accent) 72%, var(--surface-3))}.hm-4{background:var(--accent)}.heatmap__foot{justify-content:space-between;align-items:center;gap:10px;font-size:12px;display:flex}.heatmap__scale{gap:3px;display:flex}.heatmap__scale i{width:11px}.tide{justify-items:center;gap:18px;max-width:720px;margin:0 auto;display:grid}.tide__session-head{align-items:center;gap:14px;width:100%;display:flex}.tide__progress{flex:1}.flash{border-radius:var(--r-xl);border:1px solid var(--line-2);background:radial-gradient(600px 200px at 50% 0%, var(--accent-soft), transparent 70%), var(--surface);width:100%;min-height:300px;box-shadow:var(--shadow);text-align:center;animation:fade-up .35s var(--ease-out);align-content:center;gap:18px;padding:34px;display:grid}.flash__meta{color:var(--muted);flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;font-size:11.5px;display:flex}.flash__front{font-family:var(--font-display);font-size:clamp(22px,3vw,30px);font-weight:550;line-height:1.3}.flash__back{border-top:1px dashed var(--line-3);animation:fade-up .3s var(--ease-out);gap:8px;padding-top:18px;display:grid}.flash__back p{color:var(--text);font-size:18px}.flash__hint{font-size:14px}.tide__reveal .kbd{margin-left:6px}.tide__grades{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;width:100%;display:grid}.grade{border-radius:var(--r);border:1px solid var(--line-2);background:var(--surface);gap:2px;padding:14px 8px;transition:transform .15s,border-color .15s;display:grid;position:relative}.grade:hover{transform:translateY(-2px)}.grade b{font-size:16px}.grade span{color:var(--muted);font-size:12px}.grade .kbd{position:absolute;top:6px;right:6px}.grade--again b{color:var(--coral)}.grade--again:hover{border-color:var(--coral)}.grade--hard b{color:var(--amber)}.grade--hard:hover{border-color:var(--amber)}.grade--good b{color:var(--accent)}.grade--good:hover{border-color:var(--accent)}.grade--easy b{color:var(--mint)}.grade--easy:hover{border-color:var(--mint)}.tide__keys{align-items:center;gap:6px;font-size:12.5px;display:inline-flex}.tide--done{text-align:center;padding-top:40px}.tide--done h1{font-size:clamp(30px,4vw,44px)}.tide-grid{grid-template-columns:2fr 1fr 1fr;gap:14px;display:grid}.tide-hero{background:radial-gradient(500px 200px at 0% 0%, var(--amber-soft), transparent 70%), var(--surface);flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;padding:24px;display:flex}.tide-hero__num{color:var(--amber);margin:6px 0;font-size:64px;line-height:1}.tide-hero__ctas{flex-wrap:wrap;gap:10px;display:flex}.tide-split{color:var(--text-2);gap:4px;font-size:12.5px;list-style:none;display:grid}.tide-split li{align-items:center;gap:8px;display:flex}.dot{border-radius:50%;width:9px;height:9px;display:inline-block}.dot--new{background:var(--surface-3);box-shadow:0 0 0 1px var(--line-3) inset}.dot--young{background:color-mix(in srgb, var(--accent) 50%, var(--surface-3))}.dot--mature{background:var(--accent)}.dot--up{background:var(--mint)}.dot--down{background:var(--coral)}.tide-forecast{grid-column:span 2}.tide-how ol{color:var(--text-2);gap:10px;margin-top:12px;font-size:14px;list-style:none;display:grid}.tide-how li{gap:8px;display:flex}.tide-how svg{color:var(--mint);flex:none;margin-top:4px}@media (max-width:980px){.tide-grid{grid-template-columns:1fr 1fr}.tide-hero,.tide-forecast{grid-column:1/-1}}@media (max-width:560px){.tide-grid{grid-template-columns:1fr}.tide__grades{grid-template-columns:repeat(2,minmax(0,1fr))}}.depthmap__layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:18px;display:grid}.depthmap__scroll{border:1px solid var(--line-2);border-radius:22px;overflow-x:auto}.depthmap__svg{width:100%;min-width:760px;height:auto;display:block}.dm-zone{font-family:var(--font-mono);letter-spacing:.06em;font-size:12px}.dm-zone-sci{font-family:var(--font-mono);fill:#e9f2fd59;letter-spacing:.1em;text-transform:uppercase;font-size:10px}.dm-course{font-family:var(--font-display);fill:#e9f2fd;font-size:15px;font-weight:600}.dm-node{cursor:pointer;outline:none}.dm-node__ring{fill:none;stroke:hsl(var(--h) 80% 62% / .35);stroke-width:2px;stroke-dasharray:3 4}.dm-node__fill{fill:#050c18e6;stroke:none}.dm-node__n{font-family:var(--font-mono);fill:#e9f2fd80;font-size:13px;font-weight:600}.dm-node__label{font-family:var(--font-sans);fill:#e9f2fdbf;font-size:12px}.dm-lv-1 .dm-node__ring{stroke:hsl(var(--h) 90% 62%);stroke-dasharray:none}.dm-lv-1 .dm-node__n{fill:hsl(var(--h) 90% 70%)}.dm-lv-2 .dm-node__fill,.dm-lv-3 .dm-node__fill,.dm-lv-4 .dm-node__fill{fill:hsl(var(--h) 85% 55%)}.dm-lv-2 .dm-node__ring,.dm-lv-3 .dm-node__ring,.dm-lv-4 .dm-node__ring{stroke:hsl(var(--h) 90% 70%);stroke-dasharray:none}.dm-lv-2 .dm-node__n,.dm-lv-3 .dm-node__n{fill:#02101c}.dm-lv-3 .dm-node__fill{fill:#9d8aff}.dm-lv-4 .dm-node__fill{fill:#ffc95c}.dm-node__glow{fill:#9d8aff;opacity:.6}.dm-lv-4 .dm-node__glow{fill:#ffc95c}.dm-node__anchor{fill:none;stroke:#2a1a00;stroke-width:2.2px;stroke-linecap:round}.dm-node.is-selected .dm-node__ring,.dm-node:focus-visible .dm-node__ring{stroke:#fff;stroke-width:3px;stroke-dasharray:none}.dm-node:hover .dm-node__label,.dm-node.is-selected .dm-node__label{fill:#fff}.dm-diver circle{fill:#ffc95c;stroke:#02050b;stroke-width:2px}.dm-diver text{fill:#02050b;font-size:9px}.depthmap__side{gap:14px;display:grid;position:sticky;top:84px}.depthmap__detail{gap:10px;display:grid}.depthmap__detail h2{font-size:22px}.depthmap__lv{align-items:center;gap:10px;font-size:12px;display:flex}.depthmap__blurb{font-size:13.5px}.depthmap__steps{color:var(--muted);gap:6px;font-size:13.5px;list-style:none;display:grid}.depthmap__steps li{align-items:center;gap:8px;display:flex}.depthmap__steps li svg{opacity:.25}.depthmap__steps li.is-done{color:var(--text)}.depthmap__steps li.is-done svg{opacity:1;color:var(--mint)}.depthmap__cards{color:var(--accent);font-size:12px}.depthmap__legend ul{gap:8px;margin:10px 0;list-style:none;display:grid}.depthmap__legend li{align-items:center;gap:10px;font-size:14px;display:flex}.depthmap__legend li b{margin-left:auto}.depthmap__legend .muted{font-size:12.5px}.legend-node{border:2px dashed #38e1ff66;border-radius:50%;width:16px;height:16px}.legend-node.dm-lv-1{border-style:solid;border-color:var(--accent)}.legend-node.dm-lv-2{background:var(--accent);border:0}.legend-node.dm-lv-3{background:#9d8aff;border:0;box-shadow:0 0 10px #9d8aff}.legend-node.dm-lv-4{background:#ffc95c;border:0;box-shadow:0 0 10px #ffc95c}@media (max-width:1500px){.depthmap__layout{grid-template-columns:1fr}.depthmap__side{grid-template-columns:1fr 1fr;position:static}}@media (max-width:640px){.depthmap__side{grid-template-columns:1fr}}.kai-page{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:18px;display:grid}.kai-page__chat{flex-direction:column;height:calc(100dvh - 144px);min-height:520px;padding:0;display:flex;overflow:hidden}.kai-page__side{gap:14px;display:grid}.kai-page__list{color:var(--text-2);gap:12px;margin-top:12px;font-size:14px;list-style:none;display:grid}.kai-page__list li{gap:10px;display:flex}.kai-page__list svg{color:var(--violet);flex:none;margin-top:3px}.kai-page__list b{color:var(--text)}.kai-page__privacy{color:var(--text-2);gap:12px;font-size:13.5px;display:flex}.kai-page__privacy svg{color:var(--mint);flex:none}@media (max-width:1000px){.kai-page{grid-template-columns:1fr}.kai-page__chat{height:70dvh}}.pods__notice{border-radius:var(--r);background:var(--violet-soft);align-items:center;gap:10px;margin-bottom:16px;padding:10px 14px;font-size:13.5px;display:flex}.pods__notice svg{color:var(--violet);flex:none}.pods__grid{grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:18px;display:grid}.board{gap:4px;list-style:none;display:grid}.board__row{border-left:3px solid #0000;border-radius:10px;grid-template-columns:28px 30px 1fr 20px 90px 90px;align-items:center;gap:12px;padding:9px 12px;font-size:14.5px;display:grid}.board__row:nth-child(odd){background:var(--surface-2)}.board__row.is-up{border-left-color:var(--mint)}.board__row.is-down{border-left-color:var(--coral)}.board__row.is-me{background:var(--accent-soft);box-shadow:0 0 0 1px var(--accent-line) inset}.board__rank{color:var(--muted);font-size:13px}.board__name{align-items:center;gap:8px;min-width:0;font-weight:550;display:flex}.board__trend{color:var(--muted)}.board__xp{text-align:right;font-size:13px}.board__m{text-align:right;color:var(--muted);font-size:12px}.board__legend{flex-wrap:wrap;gap:16px;margin-top:14px;font-size:12.5px;display:flex}.board__legend span{align-items:center;gap:6px;display:inline-flex}.pods__side{gap:14px;display:grid}.leagues{gap:8px;margin-top:10px;list-style:none;display:grid}.leagues li{color:var(--text-2);border-radius:9px;align-items:center;gap:10px;padding:8px 10px;font-size:14px;display:flex}.leagues li i{background:var(--zc);border-radius:50%;width:10px;height:10px}.leagues li.is-current{background:var(--surface-2);color:var(--text);font-weight:600}@media (max-width:900px){.pods__grid{grid-template-columns:1fr}.board__row{grid-template-columns:24px 30px 1fr 80px}.board__trend,.board__m{display:none}}.profile{gap:18px;display:grid}.profile__hero{background:radial-gradient(600px 220px at 0% 0%, color-mix(in srgb, var(--zc) 18%, transparent), transparent 70%), var(--surface);grid-template-columns:auto 1fr auto;align-items:center;gap:22px;padding:26px;display:grid}.profile__who h1{align-items:center;gap:8px;font-size:clamp(26px,3.4vw,36px);display:flex}.profile__edit{gap:8px;max-width:360px;display:flex}.profile__stats{grid-template-columns:repeat(4,auto);gap:24px;margin:0;display:grid}.profile__stats dt{color:var(--muted);font-size:12px}.profile__stats dd{margin:0;font-size:26px}.mastery-bar{border-radius:7px;gap:2px;height:14px;margin:8px 0 12px;display:flex;overflow:hidden}.mastery-bar__seg{min-width:4px}.ms-0{background:var(--surface-3)}.ms-1{background:color-mix(in srgb, var(--accent) 40%, var(--surface-3))}.ms-2{background:var(--accent)}.ms-3{background:var(--violet)}.ms-4{background:var(--amber)}.mastery-legend{color:var(--text-2);flex-wrap:wrap;gap:8px 18px;font-size:13px;list-style:none;display:flex}.mastery-legend li{align-items:center;gap:6px;display:inline-flex}.mastery-legend i{border-radius:4px;width:12px;height:12px}.mastery-legend .lv{width:16px;height:12px;display:inline-block}.cert-list{gap:8px;list-style:none;display:grid}.cert-list li{border-radius:var(--r);border:1px solid color-mix(in srgb, var(--amber) 35%, transparent);background:var(--amber-soft);align-items:center;gap:14px;padding:12px 14px;display:flex}.cert-list li>svg{color:var(--amber)}.cert-list li div{flex:1;display:grid}.cert-list li .mono{font-size:12px}.badge-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;list-style:none;display:grid}.badge-grid li{border-radius:var(--r);border:1px solid var(--line);background:var(--surface-2);text-align:center;justify-items:center;gap:6px;padding:18px 10px;display:grid}.badge-grid li b{font-size:14px}.badge-grid li .muted{font-size:12px;line-height:1.4}.badge-grid li.is-locked b{color:var(--muted)}.badge-grid__date{color:var(--accent);font-size:11px}@media (max-width:900px){.profile__hero{grid-template-columns:auto 1fr}.profile__stats{grid-column:1/-1;grid-template-columns:repeat(4,1fr)}}.settings{gap:16px;max-width:860px;display:grid}.settings__group{gap:4px;display:grid}.settings__row{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;padding:14px 0;display:flex}.settings__row:first-of-type{border-top:0}.settings__row p{font-size:13.5px}.settings__row .seg{min-width:260px}.settings__actions{flex-wrap:wrap;align-items:center;gap:10px;margin-top:10px;display:flex}.settings__danger{border-color:color-mix(in srgb, var(--coral) 30%, transparent)}.cert-page{gap:18px;max-width:1100px;display:grid}.cert-page__verify{border-radius:var(--r);border:1px solid color-mix(in srgb, var(--mint) 40%, transparent);background:var(--mint-soft);gap:12px;padding:14px 16px;display:flex}.cert-page__verify>svg{color:var(--mint);flex:none}.cert-page__verify p{font-size:13.5px}.cert-page__frame{border-radius:var(--r-lg);box-shadow:var(--shadow-lg);border:1px solid var(--line-2);overflow:hidden}.cert-canvas{width:100%;height:auto}.cert-page__actions{flex-wrap:wrap;gap:10px;display:flex}.cert-page--bad{justify-items:start}.cert-page--bad>svg{color:var(--coral)}@media print{.site-nav,.site-footer,.cert-page__actions,.cert-page__verify{display:none!important}.cert-page__frame{box-shadow:none;border:0}}.pricing .page-head{max-width:760px}.plans{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:20px 0 28px;display:grid}.plan{border-radius:var(--r-xl);border:1px solid var(--line-2);background:var(--surface);align-content:start;gap:14px;padding:28px;display:grid;position:relative}.plan.is-featured{border-color:var(--accent-line);box-shadow:var(--glow);background:radial-gradient(400px 200px at 50% 0%, var(--accent-soft), transparent 70%), var(--surface)}.plan__ribbon{background:var(--accent);color:var(--accent-ink);border-radius:99px;padding:3px 10px;font-size:11px;position:absolute;top:-11px;left:24px}.plan__name{letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-size:12.5px}.plan__price .stat-num{font-size:44px}.plan__price small{color:var(--muted);font-size:13px;display:block}.plan__desc{color:var(--text-2);min-height:48px;font-size:15px}.plan__current{justify-self:center}.compare{overflow-x:auto}.compare table{border-collapse:collapse;width:100%;min-width:620px}.compare th,.compare td{border-bottom:1px solid var(--line);text-align:center;padding:13px 14px;font-size:14.5px}.compare thead th{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-size:12px;font-weight:500}.compare tbody th{text-align:left;color:var(--text-2);font-weight:500}.compare tbody tr:last-child th,.compare tbody tr:last-child td{border-bottom:0}.compare .yes{color:var(--mint)}.compare .no{color:var(--faint)}.pricing__note{align-items:center;gap:8px;margin-top:14px;font-size:13px;display:flex}@media (max-width:900px){.plans{grid-template-columns:1fr}}.schools__hero{gap:28px;padding-bottom:40px;display:grid}.schools__pillars{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;list-style:none;display:grid}.schools__pillars li{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);gap:6px;padding:18px;display:grid}.schools__pillars svg{color:var(--accent)}.schools__pillars span{color:var(--text-2);font-size:14px}.schools__demo{gap:16px;padding-bottom:56px;display:grid}.schools__demo-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:14px;display:flex}.schools__demo-head h2{font-size:28px}.schools__demo-head .muted{align-items:center;gap:6px;margin-top:4px;font-size:13px;display:flex}.schools__toolbar{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.schools__toolbar .select{width:auto;min-height:36px;padding-top:6px;padding-bottom:6px;font-size:14px}.teacher{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:16px;display:grid}.teacher__heat{overflow-x:auto}.teacher__table{border-collapse:separate;border-spacing:4px;width:100%;min-width:560px;font-size:14px}.teacher__table thead th{text-align:center;vertical-align:bottom;font-weight:500}.teacher__table thead th span{color:var(--accent);font-size:12px;display:block}.teacher__table thead th small{max-width:120px;color:var(--muted);margin:0 auto;font-size:11px;line-height:1.3;display:block}.teacher__table thead th:first-child{text-align:left}.teacher__table tbody th{text-align:left;font-weight:500}.teacher__table td{text-align:center;min-width:70px}.teacher__table tbody tr{cursor:pointer}.teacher__table tbody tr:hover th,.teacher__table tbody tr.is-selected th{color:var(--accent)}.teacher__table tfoot th,.teacher__table tfoot td{color:var(--muted);text-align:left;padding-top:8px;font-size:12.5px}.teacher__table tfoot td{text-align:center}.teacher__name{font:inherit;color:inherit}.lv--0{background:var(--surface-3)}[data-theme=light] .lv--1{background:#0087b62e}[data-theme=light] .lv--2{background:#0087b666}[data-theme=light] .lv--3{background:#0087b6b3}.teacher__side{gap:14px;display:grid}.teacher__student h3{font-size:20px}.teacher__student .muted{font-size:13px}.teacher__lessons{gap:8px;margin-top:12px;list-style:none;display:grid}.teacher__lessons li{grid-template-columns:22px 1fr auto;align-items:center;gap:10px;font-size:13.5px;display:grid}.teacher__lessons .lv{height:14px}.teacher__lessons b{color:var(--text-2);font-size:12px}.teacher__radar .tag{align-items:center;gap:6px;display:flex}.teacher__radar ul{gap:12px;margin-top:12px;list-style:none;display:grid}.teacher__radar li{gap:10px;font-size:13.5px;display:flex}.teacher__radar li p{color:var(--text)}.teacher__radar li span{font-size:11.5px}.teacher__assigned{gap:6px;margin-top:8px;font-size:13.5px;list-style:none;display:grid}.teacher__assigned li{align-items:center;gap:8px;display:flex}.teacher__assigned svg{color:var(--mint)}.schools__pilot{padding-bottom:96px}.schools__form-card{grid-template-columns:1fr 1.2fr;gap:28px;padding:30px;display:grid}.schools__form-card>div>svg{color:var(--accent);margin-bottom:10px}.schools__form-card h2{margin-bottom:8px;font-size:28px}.schools__form{grid-template-columns:1fr 1fr;gap:14px;display:grid}.schools__form .btn{grid-column:1/-1;justify-self:start}.schools__form-note{grid-column:1/-1;font-size:12.5px}.schools__sent{border-radius:var(--r);background:var(--mint-soft);align-items:flex-start;gap:12px;padding:16px;display:flex}.schools__sent svg{color:var(--mint);flex:none}@media (max-width:1000px){.schools__pillars{grid-template-columns:1fr 1fr}.teacher,.schools__form-card{grid-template-columns:1fr}}@media (max-width:560px){.schools__pillars,.schools__form{grid-template-columns:1fr}}.palette-backdrop{align-items:start;padding-top:12vh}.palette{border-radius:var(--r-xl);border:1px solid var(--line-2);background:var(--surface);width:min(640px,100%);max-height:70vh;box-shadow:var(--shadow-lg);animation:fade-up .2s var(--ease-out);flex-direction:column;display:flex;overflow:hidden}.palette__search{border-bottom:1px solid var(--line);color:var(--muted);align-items:center;gap:12px;padding:16px 18px;display:flex}.palette__search input{color:var(--text);background:0 0;border:0;outline:none;flex:1;font-size:17px}.palette__list{padding:8px;list-style:none;overflow-y:auto}.palette__item{cursor:pointer;border-radius:10px;grid-template-columns:32px 1fr auto 16px;align-items:center;gap:12px;padding:10px;display:grid}.palette__item.is-active{background:var(--surface-2)}.palette__icon{background:var(--surface-3);width:32px;height:32px;color:var(--text-2);border-radius:9px;place-items:center;display:grid}.palette__icon.is-lab{color:var(--accent)}.palette__icon.is-lesson{color:var(--mint)}.palette__icon.is-term{color:var(--violet)}.palette__icon.is-course{color:var(--amber)}.palette__text{min-width:0;display:grid}.palette__text b{font-size:14.5px;font-weight:550}.palette__text span{color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:12.5px;overflow:hidden}.palette__kind{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:10.5px}.palette__enter{color:var(--muted)}.palette__empty{text-align:center;padding:24px}.not-found{text-align:center;justify-items:center;gap:14px;padding-top:100px;display:grid}.not-found__code{color:var(--accent);font-size:14px}.not-found h1{max-width:640px;font-size:clamp(30px,4vw,46px)}.player{background:var(--bg);flex-direction:column;min-height:100dvh;display:flex}.player__bar{z-index:50;background:color-mix(in srgb, var(--bg) 85%, transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:16px;height:60px;padding:0 14px;display:grid;position:sticky;top:0}.player__bar-left{align-items:center;gap:8px;min-width:0;display:flex}.player__logo{place-items:center;margin:0 4px;display:inline-grid}.player__outline-toggle{display:none}.player__titles{min-width:0;line-height:1.25;display:grid}.player__course{font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);white-space:nowrap;text-overflow:ellipsis;font-size:11px;overflow:hidden}.player__lesson{white-space:nowrap;text-overflow:ellipsis;font-size:14.5px;font-weight:600;overflow:hidden}.player__steps{align-items:center;gap:6px;display:flex}.player__seg{border:1px solid var(--line-2);background:var(--surface);width:34px;height:28px;color:var(--muted);border-radius:8px;place-items:center;transition:border-color .15s,color .15s,background .15s;display:grid;position:relative}.player__seg+.player__seg:before{content:"";background:var(--line-2);width:6px;height:1px;position:absolute;right:100%}.player__seg:hover{color:var(--text);border-color:var(--line-3)}.player__seg.is-done{color:var(--mint);border-color:color-mix(in srgb, var(--mint) 40%, transparent);background:var(--mint-soft)}.player__seg.is-current{color:var(--accent-ink);background:var(--accent);border-color:var(--accent);box-shadow:0 0 18px -4px var(--accent)}.player__bar-right{justify-content:flex-end;align-items:center;gap:6px;display:flex}.player__body{flex:1;grid-template-columns:290px minmax(0,1fr);align-items:start;display:grid}.player__body.has-drawer{grid-template-columns:290px minmax(0,1fr) 380px}.player__outline{border-right:1px solid var(--line);align-content:start;gap:12px;height:calc(100dvh - 60px);padding:22px 16px 40px;display:grid;position:sticky;top:60px;overflow-y:auto}.outline{gap:4px;list-style:none;display:grid}.outline__link{color:var(--text-2);border-radius:10px;grid-template-columns:28px 1fr auto;align-items:center;gap:8px;padding:9px 10px;font-size:14px;transition:background .15s;display:grid}.outline__link:hover{background:var(--surface-2)}.outline__lesson.is-current>.outline__link{color:var(--text);background:var(--surface-2);font-weight:600}.outline__n{border:1px solid var(--line-2);width:26px;height:26px;color:var(--muted);border-radius:8px;place-items:center;font-size:11px;display:grid}.outline__lesson.is-done .outline__n{color:var(--mint);border-color:color-mix(in srgb, var(--mint) 45%, transparent);background:var(--mint-soft)}.outline__lesson.is-current .outline__n{border-color:var(--accent-line);color:var(--accent)}.outline__pct{color:var(--muted);font-size:11px}.outline__steps{border-left:1px solid var(--line-2);gap:2px;margin:4px 0 10px 22px;padding-left:12px;list-style:none;display:grid}.outline__step{text-align:left;width:100%;color:var(--muted);border-radius:8px;grid-template-columns:16px 1fr auto;align-items:center;gap:8px;padding:7px 8px;font-size:13px;display:grid}.outline__step:hover{color:var(--text);background:var(--surface-2)}.outline__step.is-current{color:var(--accent);background:var(--accent-soft)}.outline__step.is-done{color:var(--text-2)}.outline__tick{color:var(--mint)}.player__main{min-width:0;padding:36px clamp(16px,4vw,56px) 80px}.player__drawer{border-left:1px solid var(--line);background:var(--surface);height:calc(100dvh - 60px);animation:drawer-in .25s var(--ease-out);flex-direction:column;display:flex;position:sticky;top:60px}@keyframes drawer-in{0%{opacity:0;transform:translate(16px)}}.player__drawer-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:14px 16px;display:flex}.player__drawer-head h2{font-size:16px}.player__scrim{z-index:40;background:#00000073;position:fixed;inset:60px 0 0}@media (max-width:1180px){.player__body,.player__body.has-drawer{grid-template-columns:minmax(0,1fr)}.player__outline-toggle{display:inline-grid}.player__outline{z-index:45;background:var(--bg);width:min(320px,86vw);transition:transform .28s var(--ease-out);box-shadow:var(--shadow-lg);position:fixed;top:60px;left:0;transform:translate(-102%)}.player__outline.is-open{transform:none}.player__drawer{z-index:45;width:min(420px,100vw);box-shadow:var(--shadow-lg);position:fixed;top:60px;right:0}}@media (max-width:760px){.player__bar{grid-template-columns:minmax(0,1fr) auto;row-gap:8px;height:auto;min-height:60px;padding:8px 10px}.player__steps{grid-area:2/1/auto/-1;justify-content:center}.player__logo,.hide-sm{display:none}.player__outline,.player__drawer{height:calc(100dvh - 100px);top:100px}.player__main{padding-top:24px}}.step{max-width:820px;animation:fade-up .4s var(--ease-out);margin:0 auto}.step--lab,.step--code{max-width:1240px}.step--teach{max-width:1040px}.step__head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.step__kind{height:28px;font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--accent-line);color:var(--accent);background:var(--accent-soft);border-radius:99px;align-items:center;gap:7px;padding:0 11px;font-size:11.5px;display:inline-flex}.step__kind--quiz{color:var(--amber);border-color:color-mix(in srgb, var(--amber) 40%, transparent);background:var(--amber-soft)}.step__kind--teach{color:var(--violet);border-color:color-mix(in srgb, var(--violet) 40%, transparent);background:var(--violet-soft)}.step__kind--code{color:var(--mint);border-color:color-mix(in srgb, var(--mint) 40%, transparent);background:var(--mint-soft)}.step__count{color:var(--muted);font-size:12px}.step__title{margin-bottom:26px;font-size:clamp(28px,3.6vw,40px)}.step__prose{font-size:17.5px}.step__brief{max-width:820px;margin-bottom:20px}.step__lab{gap:4px;display:grid}.step__success{border-radius:var(--r);border:1px solid color-mix(in srgb, var(--mint) 45%, transparent);background:var(--mint-soft);color:var(--text);animation:fade-up .4s var(--ease-out);align-items:center;gap:12px;margin-top:16px;padding:14px 16px;display:flex}.step__success svg{color:var(--mint);flex:none}.step__success span{color:var(--text-2)}.step__skip-note{margin-top:14px;font-size:13.5px}.step__done-note{color:var(--mint);align-items:center;gap:8px;margin-bottom:16px;font-size:14px;display:flex}.link-btn{color:var(--accent);text-underline-offset:3px;font-size:inherit;text-decoration:underline}.step__nav{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;margin-top:40px;padding-top:20px;display:flex}.step__nav-right{align-items:center;gap:8px;display:flex}.quiz{gap:18px;display:grid}.quiz__dots{gap:6px;display:flex}.quiz__dots i{background:var(--surface-3);border-radius:4px;width:28px;height:4px}.quiz__dots i.is-current{background:var(--accent)}.quiz__dots i.is-good{background:var(--mint)}.quiz__dots i.is-meh{background:var(--amber)}.quiz__next{justify-self:start}.quiz-q{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);gap:16px;padding:24px;display:grid}.quiz-q__count{color:var(--muted);font-size:12px}.quiz-q__count span{margin-left:6px}.quiz-q__prompt{font-size:21px;line-height:1.35}.quiz-q__prompt code{background:var(--surface-3);border-radius:6px;padding:1px 6px;font-size:.85em}.quiz-options{gap:10px;display:grid}.quiz-option{border-radius:var(--r);border:1px solid var(--line-2);background:var(--bg-elev);text-align:left;width:100%;color:var(--text);grid-template-columns:30px 1fr 22px;align-items:center;gap:12px;padding:13px 14px;font-size:15.5px;transition:border-color .15s,background .15s,transform .15s;display:grid}.quiz-option:hover:not(:disabled){border-color:var(--line-3)}.quiz-option__key{border:1px solid var(--line-2);width:28px;height:28px;color:var(--muted);border-radius:8px;place-items:center;font-size:12px;display:grid}.quiz-option__mark{border:1.5px solid var(--line-3);border-radius:50%;place-items:center;width:20px;height:20px;display:grid}.quiz-option__mark.is-box{border-radius:6px}.quiz-option.is-selected{border-color:var(--accent-line);background:var(--accent-soft)}.quiz-option.is-selected .quiz-option__mark{border-color:var(--accent);background:var(--accent);color:var(--accent-ink)}.quiz-option.is-selected .quiz-option__key{border-color:var(--accent-line);color:var(--accent)}.quiz-option.is-wrong{border-color:color-mix(in srgb, var(--coral) 55%, transparent);background:var(--coral-soft);animation:.35s shake}.quiz-option.is-correct{border-color:color-mix(in srgb, var(--mint) 55%, transparent);background:var(--mint-soft)}.quiz-option.is-correct .quiz-option__mark{background:var(--mint);border-color:var(--mint);color:var(--bg)}.quiz-option:disabled{cursor:default}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.quiz-order{gap:8px;list-style:none;display:grid}.quiz-order__item{border-radius:var(--r);border:1px solid var(--line-2);background:var(--bg-elev);grid-template-columns:30px 1fr auto;align-items:center;gap:12px;padding:10px 10px 10px 14px;display:grid}.quiz-order__n{color:var(--accent);font-size:13px}.quiz-order__btns{gap:2px;display:flex}.quiz-order__item.is-locked{border-color:color-mix(in srgb, var(--mint) 45%, transparent)}.quiz-numeric{align-items:center;gap:10px;max-width:280px;display:flex}.quiz-numeric .input{font-size:18px}.quiz-numeric__unit{color:var(--text-2)}.quiz-q__actions{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.quiz-feedback{color:var(--text-2);align-items:center;gap:6px;font-size:14.5px;font-weight:600;display:inline-flex}.quiz-feedback--good{color:var(--mint)}.quiz-feedback--bad{color:var(--coral)}.quiz-explain{border-radius:var(--r);background:var(--surface-2);border-left:3px solid var(--accent);color:var(--text-2);animation:fade-up .3s var(--ease-out);padding:14px 16px;font-size:15px}.quiz-summary{border-radius:var(--r-lg);border:1px solid var(--accent-line);background:linear-gradient(120deg, var(--accent-soft), transparent);align-items:center;gap:20px;padding:20px 22px;display:flex}.quiz-summary__score{color:var(--accent);font-size:48px}.quiz-summary__title{font-size:17px;font-weight:650}.bubble{max-width:88%;animation:fade-up .3s var(--ease-out);align-items:flex-end;gap:10px;display:flex}.bubble--you{flex-direction:row-reverse;margin-left:auto}.bubble__text{background:var(--surface-2);border:1px solid var(--line);color:var(--text);white-space:pre-wrap;border-radius:16px;padding:11px 15px;font-size:15px;line-height:1.55}.bubble__text p+p{margin-top:8px}.bubble--kai .bubble__text{background:linear-gradient(140deg, color-mix(in srgb, var(--violet) 12%, var(--surface-2)), var(--surface-2));border-bottom-left-radius:5px}.bubble--you .bubble__text{background:var(--accent-soft);border-color:var(--accent-line);border-bottom-right-radius:5px}.bubble__links{flex-wrap:wrap;gap:8px;margin-top:10px;display:flex}.bubble__typing{gap:5px;padding:15px 16px;display:inline-flex}.bubble__typing i{background:var(--violet);border-radius:50%;width:7px;height:7px;animation:1.1s ease-in-out infinite typing}.bubble__typing i:nth-child(2){animation-delay:.15s}.bubble__typing i:nth-child(3){animation-delay:.3s}@keyframes typing{0%,60%,to{opacity:.4;transform:translateY(0)}30%{opacity:1;transform:translateY(-5px)}}.teach{grid-template-columns:minmax(0,1fr) 270px;align-items:start;gap:18px;display:grid}.teach__main{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);gap:14px;padding:18px;display:grid}.teach__log{align-content:start;gap:14px;min-height:160px;max-height:460px;padding:4px 2px;display:grid;overflow-y:auto}.teach__compose{gap:10px;display:grid}.teach__compose-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.teach__tip{align-items:center;gap:6px;font-size:13px;display:inline-flex}.teach__tip svg{color:var(--amber)}.teach__result{border-radius:var(--r);border:1px solid color-mix(in srgb, var(--violet) 40%, transparent);background:var(--violet-soft);animation:fade-up .4s var(--ease-out);grid-template-columns:auto 1fr;gap:18px;padding:16px;display:grid}.teach__score{align-items:baseline;gap:2px;display:flex}.teach__score .stat-num{color:var(--violet);font-size:48px}.teach__score small{color:var(--muted)}.teach__result-title{margin-bottom:10px;font-weight:650}.teach__model-label{margin-bottom:4px}.teach__model{color:var(--text-2);font-size:15px}.teach__rubric{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);gap:12px;padding:16px;display:grid;position:sticky;top:84px}.teach__meter{align-items:center;gap:10px;display:flex}.teach__meter .progress{flex:1}.teach__meter span{color:var(--text-2);font-size:12.5px}.teach__concepts{gap:8px;list-style:none;display:grid}.teach__concepts li{color:var(--text);align-items:center;gap:10px;font-size:14px;display:flex}.teach__check{border:1.5px dashed var(--line-3);border-radius:50%;flex:none;place-items:center;width:20px;height:20px;display:grid}.teach__concepts li.is-ok .teach__check{background:var(--violet);color:#fff;animation:pop .35s var(--ease-out);border:0}.teach__hidden{color:var(--faint);font-size:13px;font-style:italic}.teach__note{color:var(--muted);font-size:12px;line-height:1.45}@keyframes pop{0%{transform:scale(.4)}70%{transform:scale(1.2)}to{transform:scale(1)}}.teach--compact{grid-template-columns:1fr}@media (max-width:860px){.teach{grid-template-columns:1fr}.teach__rubric{order:-1;position:static}}.code-step{gap:20px;display:grid}.code-step__brief{max-width:820px}.code-step__grid{grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);align-items:start;gap:16px;display:grid}.code-step__editor{gap:10px;min-width:0;display:grid}.code-step__bar{justify-content:space-between;align-items:center;display:flex}.code-step__bar .tag{align-items:center;gap:6px;display:inline-flex}.code-step__kbd{font-size:12.5px}.code-step__side{gap:14px;display:grid}.code-tests{border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface);gap:10px;padding:14px;display:grid}.code-tests__head{justify-content:space-between;align-items:center;display:flex}.code-tests__list{gap:6px;list-style:none;display:grid}.code-tests__list li{background:var(--bg-elev);border:1px solid var(--line);border-radius:10px;grid-template-columns:20px 1fr;gap:10px;padding:9px 10px;font-size:13px;display:grid}.code-tests__list li.is-pass{border-color:color-mix(in srgb, var(--mint) 40%, transparent)}.code-tests__list li.is-fail{border-color:color-mix(in srgb, var(--coral) 45%, transparent)}.code-tests__icon{background:var(--surface-3);border-radius:50%;place-items:center;width:20px;height:20px;display:grid}.is-pass .code-tests__icon{background:var(--mint);color:var(--bg)}.is-fail .code-tests__icon{background:var(--coral);color:#fff}.code-tests__dot{background:var(--faint);border-radius:50%;width:6px;height:6px}.code-tests__body{overflow-wrap:anywhere;min-width:0}.code-tests__body code{color:var(--text);font-size:12.5px}.code-tests__exp{color:var(--muted);margin-top:2px;font-size:12px}.code-tests__got{color:var(--coral)}.code-console{background:var(--bg-elev);border:1px dashed var(--line-2);max-height:160px;color:var(--text-2);white-space:pre-wrap;border-radius:10px;margin:0;padding:10px 12px;font-size:12px;overflow:auto}.code-msg{border-radius:10px;padding:10px 12px;font-size:13.5px}.code-msg--bad{color:var(--coral);background:var(--coral-soft)}.code-help{gap:10px;display:grid}.code-hint{background:var(--amber-soft);color:var(--text);animation:fade-up .3s var(--ease-out);border-radius:10px;gap:8px;padding:10px 12px;font-size:14px;display:flex}.code-hint svg{color:var(--amber);flex:none;margin-top:3px}.code-success{border-radius:var(--r);background:var(--mint-soft);border:1px solid color-mix(in srgb, var(--mint) 45%, transparent);color:var(--text);align-items:center;gap:10px;padding:14px;font-weight:550;display:flex}.code-success svg{color:var(--mint)}@media (max-width:960px){.code-step__grid{grid-template-columns:1fr}}.notes{flex:1;grid-template-rows:1fr auto;gap:8px;min-height:0;padding:14px;display:grid}.notes__area{resize:none;height:100%;min-height:300px}.notes__hint{font-size:12px}.complete{text-align:center;max-width:760px;animation:fade-up .5s var(--ease-out);justify-items:center;gap:14px;margin:24px auto 0;padding:40px 20px;display:grid;position:relative}.complete__title{font-size:clamp(32px,5vw,52px)}.complete__stats{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;width:100%;margin-top:12px;display:grid}.complete__stats>div{border-radius:var(--r);border:1px solid var(--line);background:var(--surface);gap:2px;padding:16px 10px;display:grid}.complete__stats .stat-num{color:var(--accent);font-size:24px}.complete__stats small{color:var(--muted);font-size:12px}.complete__mastery{max-width:520px}.complete__cert{border:1px solid color-mix(in srgb, var(--amber) 50%, transparent);background:var(--amber-soft);color:var(--amber);border-radius:99px;align-items:center;gap:10px;padding:12px 18px;font-weight:600;display:inline-flex}.complete__actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:16px;display:flex}.complete__remaining{gap:8px;list-style:none;display:grid}.complete__burst{pointer-events:none;position:absolute;top:70px;left:50%}.complete__burst i{background:var(--accent);opacity:0;width:6px;height:6px;animation:burst 1.4s var(--ease-out) forwards;animation-delay:calc(var(--i) * 25ms);transform:rotate(calc(var(--i) * 25.7deg)) translateY(0);border-radius:50%;position:absolute}.complete__burst i:nth-child(3n){background:var(--violet)}.complete__burst i:nth-child(3n+1){background:var(--amber)}@keyframes burst{0%{opacity:1;transform:rotate(calc(var(--i) * 25.7deg)) translateY(0) scale(1)}to{opacity:0;transform:rotate(calc(var(--i) * 25.7deg)) translateY(-110px) scale(.4)}}@media (max-width:640px){.complete__stats{grid-template-columns:repeat(2,minmax(0,1fr))}}.kai-chat{flex-direction:column;flex:1;min-height:0;display:flex}.kai-chat__log{flex-direction:column;flex:1;gap:14px;min-height:0;padding:18px 16px;display:flex;overflow-y:auto}.kai-chat__intro{text-align:center;justify-items:center;gap:10px;margin:auto 0;padding:20px 10px;display:grid}.kai-chat__intro h3{font-size:22px}.kai-chat__intro p{max-width:440px;font-size:14.5px}.kai-chat__offline{letter-spacing:.1em;text-transform:uppercase;font-size:11px;color:var(--violet)!important}.kai-chat__chips{scrollbar-width:none;gap:6px;padding:10px 16px 4px;display:flex;overflow-x:auto}.kai-chat__chips .chip{flex:none}.kai-chat__form{gap:8px;padding:10px 16px 16px;display:flex}.kai-chat--compact .bubble{max-width:100%}