:root{color-scheme:light;--ink:#152541;--muted:#61728a;--blue:#335cff;--line:#dce4ef;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 80% 0,#dceeea88,transparent 35%),#f5f7fb;color:var(--ink);min-width:320px}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #527bff;outline-offset:4px}p{line-height:1.65}h1,h2,p{margin-top:0}h2{font-size:22px;letter-spacing:-.025em;line-height:1.25}button{min-height:44px;border:1px solid var(--line);border-radius:12px;padding:10px 16px;background:white;color:var(--ink);font-weight:650;font-size:13px;transition:background .2s,border-color .2s}button:hover{border-color:#91a9ed;background:#f0f4ff}
.mechanics-header,main,footer{width:min(1240px,calc(100% - 48px));margin:auto}.mechanics-header{display:flex;align-items:center;gap:24px;min-height:84px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.025em}.brand img{border-radius:10px}.home-link{margin-left:auto;font-size:13px;color:var(--muted)}.language-switch{display:flex;border:1px solid var(--line);padding:3px;border-radius:100px;background:#fff}.language-switch button{border:0;min-height:36px;border-radius:100px;padding:7px 12px;font-size:11px}.language-switch .active{background:var(--blue);color:white}
.intro{display:grid;grid-template-columns:1.5fr 1fr;align-items:end;gap:50px;padding:48px 0 28px}.eyebrow{color:#3c65b2;font-size:10px;letter-spacing:.14em;font-weight:800;margin-bottom:12px}h1{font-size:clamp(32px,4vw,52px);line-height:1.06;letter-spacing:-.055em;max-width:660px;margin:0}.intro>p{color:var(--muted);font-size:15px;margin:0;max-width:390px}.demo-nav{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:4px 0 24px}.demo-nav button{text-align:left;display:grid;grid-template-columns:30px 1fr;gap:5px 9px;padding:16px}.demo-nav span{grid-row:span 2;font-size:11px;color:#8ba0b9;align-self:center}.demo-nav b{font-size:14px}.demo-nav small{font-size:11px;font-weight:400;color:var(--muted)}.demo-nav [aria-pressed=true]{background:#172d4b;color:white;border-color:#172d4b;box-shadow:0 8px 20px #17365920}.demo-nav [aria-pressed=true] small,.demo-nav [aria-pressed=true] span{color:#9cdccd}
.workspace{display:grid;grid-template-columns:minmax(0,1.9fr) minmax(285px,1fr);gap:20px;align-items:stretch}.scene{overflow:hidden;background:#101f34;color:#eef6ff;border-radius:24px;box-shadow:0 16px 38px #1c355c16}.scene-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:22px 26px 0}.scene-heading h2{margin:0;font-size:23px}.scene-heading .eyebrow{color:#77dbc4;margin-bottom:8px}.time{font:12px ui-monospace,monospace;color:#a9bbd1;white-space:nowrap}canvas{display:block;width:100%;height:auto;aspect-ratio:1000/540}.scene-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px;padding:0 24px}.scene-actions button{background:#23384f;border-color:#405572;color:#e7f0ff}.scene-actions .primary{background:#8fe5cb;color:#122c30;border-color:#8fe5cb;min-width:140px}.scene-actions .primary:hover{background:#b1f1de}.slow{display:flex;gap:6px;align-items:center;font-size:11px;color:#bdcde2;cursor:pointer}.slow input{accent-color:#8fe5cb;width:17px;height:17px}.scene-status{color:#c0d2e7;margin:14px 24px 20px;font-size:12px;min-height:20px}
.controls{padding:26px;background:#fff;border:1px solid var(--line);border-radius:24px}.controls>p:not(.eyebrow){color:var(--muted);font-size:12px}.slider-field{margin:24px 0}.slider-field label{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;font-weight:650}.slider-field output{font:12px ui-monospace,monospace;padding:6px 9px;color:#22509d;background:#edf3fd;border-radius:8px;white-space:nowrap}.slider-field input{width:100%;margin:15px 0 0;accent-color:var(--blue);height:20px;cursor:pointer}.select-field{display:block;font-size:13px;font-weight:650;margin-top:24px}.select-field select{display:block;width:100%;padding:11px;border:1px solid var(--line);border-radius:10px;background:#f8faff;margin-top:10px;font-size:12px;color:var(--ink)}.preset{width:100%;color:#315daf;background:#f2f6ff;font-size:12px;margin-top:8px}.controls .reset-note{font-size:10px;line-height:1.5;margin:12px 0 0}
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:18px 0 24px}.metric{padding:17px 22px;border:1px solid var(--line);border-radius:18px;background:#ffffffbb}.metric span{display:block;font-size:11px;color:var(--muted);margin-bottom:8px}.metric strong{font:600 19px ui-monospace,monospace;letter-spacing:-.04em}.learning-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}.learning-grid article{padding:26px;border-radius:22px;border:1px solid var(--line);background:white}.learning-grid h2{font-size:20px}.answers{display:flex;gap:8px;flex-wrap:wrap}.answers button{flex:1;min-width:100px;font-size:12px}.answers [aria-pressed=true]{background:#edf3ff;border-color:#335cff;color:#244fc4}#feedback{min-height:44px;font-size:13px;color:#496479;margin:18px 0 0}.formula{font-family:Georgia,serif;font-size:26px;color:#28518e;letter-spacing:.02em;margin:6px 0 18px}.explanation>p{color:#526b81;font-size:13px}.explanation .assumptions{font-size:11px;border-top:1px solid var(--line);padding-top:12px;color:#768397}.ai-link{display:inline-block;margin-top:6px;font-size:13px;color:#335cff;font-weight:650}.classroom{display:flex;gap:24px;align-items:center;margin:24px 0;background:#e7f1ed;border:1px solid #d2e6dc;border-radius:22px;padding:26px}.classroom-icon{display:grid;place-items:center;flex-shrink:0;width:48px;height:48px;border-radius:15px;background:#237c66;color:#fff;font-size:26px}.classroom .eyebrow{color:#367c69}.classroom h2{font-size:19px;margin-bottom:8px}.classroom p:last-child{font-size:12px;color:#52766b;margin:0}.continue{display:flex;gap:24px;flex-wrap:wrap;font-size:13px;margin:28px 0 45px;color:#4b6287}.continue a{text-decoration:underline;text-underline-offset:4px}footer{border-top:1px solid var(--line);padding:25px 0;display:flex;justify-content:space-between;gap:20px;font-size:11px;color:var(--muted)}
@media(max-width:960px){.workspace{grid-template-columns:1fr}.controls{display:block}#controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px}.preset{width:auto}.intro{gap:24px}.demo-nav button{padding:12px;grid-template-columns:1fr}.demo-nav span{display:none}.scene-actions{padding-top:6px}.learning-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.mechanics-header,main,footer{width:calc(100% - 28px)}.mechanics-header{gap:10px;flex-wrap:wrap;padding:14px 0;min-height:0}.brand{font-size:15px}.language-switch{margin-left:auto}.home-link{order:3;flex-basis:100%;margin:0;font-size:12px}.intro{grid-template-columns:1fr;padding:30px 0 24px;gap:18px}.intro>p{font-size:14px}.demo-nav{grid-template-columns:1fr 1fr;gap:8px}.demo-nav button{padding:13px}.workspace{gap:14px}.scene-heading{padding:20px 16px 0;align-items:start}.scene-heading h2{font-size:19px}.scene-heading .eyebrow{font-size:9px;letter-spacing:.07em}.time{font-size:10px;margin-top:4px}.scene-actions{padding:0 16px;gap:8px}.scene-actions button{font-size:12px;padding:10px}.slow{flex-basis:100%;min-height:36px}.scene-status{margin:10px 16px 18px}.controls{padding:22px}#controls{grid-template-columns:1fr;gap:0}.slider-field{margin:18px 0}.metrics{gap:8px}.metric{padding:13px 10px;border-radius:13px}.metric strong{font-size:14px}.metric span{font-size:10px;min-height:24px}.learning-grid{grid-template-columns:1fr;gap:14px}.learning-grid article{padding:22px}.classroom{padding:22px;align-items:start;gap:14px}.classroom-icon{width:32px;height:32px;font-size:18px}.classroom h2{font-size:17px}footer{flex-direction:column;gap:8px}.continue{gap:16px;font-size:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}