:root{--ink:#173047;--muted:#667d8c;--blue:#2e84ef;--coral:#ff675e;--line:#d7e9f0;--shadow:0 22px 60px #1a4a681f}*{box-sizing:border-box}html,body{min-height:100%;color:var(--ink);background:radial-gradient(circle at 10% 5%,#effeff 0,#f6fcff 31%,#fffaf4 76%,#fff 100%);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{overflow-x:hidden}button,input{font:inherit}.app-shell{max-width:1440px;margin:auto;padding:20px 22px 30px}.topbar,.canvas-head,.panel-head,.head-actions,.top-actions{align-items:center;display:flex}.topbar{justify-content:space-between;padding:6px 3px 16px}.brand{align-items:center;gap:10px;display:flex}.brand-mark{color:#fff;background:linear-gradient(135deg,#176fcf,#3bcbd8);border-radius:14px;place-items:center;width:43px;height:43px;font-size:26px;font-weight:950;display:grid;box-shadow:0 11px 28px #2e84ef3b}.brand-name{letter-spacing:.18em;font-size:14px;font-weight:950}.brand-sub{color:var(--muted);margin-top:2px;font-size:11px}.top-actions{color:var(--muted);gap:8px;font-size:12px}.status-dot,.pulse-dot{background:#62d67b;border-radius:50%;width:9px;height:9px;box-shadow:0 0 0 5px #62d67b1c}.hero{justify-content:space-between;align-items:center;gap:30px;padding:30px 9px 34px;display:flex}.eyebrow,.mini-label{letter-spacing:.18em;color:#5e8ca1;font-size:10px;font-weight:950}.hero h1{letter-spacing:-.06em;margin:9px 0 15px;font-size:clamp(42px,6vw,72px);line-height:.94}.hero h1 span{color:var(--coral)}.hero p{max-width:760px;color:var(--muted);margin:0;font-size:15px;line-height:1.65}.hero-orbit{border:1px dashed #a8d7e2;border-radius:50%;flex:0 0 145px;width:145px;height:145px;position:relative}.orbit-ring{border:1px solid #c4e3eb;border-radius:50%;position:absolute;inset:18px}.ring-b{border-color:#d4eaf0;inset:42px}.orbit-core{color:#fff;background:#173047;border-radius:50%;place-items:center;font-size:19px;font-weight:950;display:grid;position:absolute;inset:51px}.orbit-dot{background:var(--coral);border-radius:50%;width:11px;height:11px;animation:2.8s ease-in-out infinite float;position:absolute;top:11px;left:67px}.dot-b{background:var(--blue);animation-delay:.45s;top:68px;left:122px}.dot-c{background:#70c566;animation-delay:.9s;top:119px;left:34px}@keyframes float{50%{transform:translate(4px,7px)scale(1.12)}}.lab-grid{grid-template-columns:245px minmax(0,1fr);gap:18px;display:grid}.glass{box-shadow:var(--shadow);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffffd6;border:1px solid #cae4edf2}.sidebar{border-radius:24px;padding:15px}.side-title{letter-spacing:.09em;margin:5px 4px 12px;font-size:12px;font-weight:950}.experiment{text-align:left;width:100%;color:var(--ink);cursor:pointer;background:0 0;border:0;border-radius:16px;grid-template-columns:38px minmax(0,1fr) 16px;align-items:center;gap:10px;padding:12px;display:grid}.experiment.active{background:#eefaff;outline:1px solid #c7e7f1}.experiment.disabled{opacity:.48;cursor:default}.exp-icon{background:#f4fbfd;border-radius:12px;place-items:center;width:36px;height:36px;font-size:19px;display:grid}.experiment b,.experiment small{display:block}.experiment b{font-size:13px}.experiment small{color:var(--muted);margin-top:3px;font-size:11px}.side-note{background:linear-gradient(135deg,#fff9dd,#efffe8);border:1px solid #e8e6c5;border-radius:18px;margin-top:13px;padding:13px}.side-note b{font-size:12px}.side-note p{color:#6d7c84;margin:4px 0 0;font-size:10px;line-height:1.55}.canvas-card,.panel{border-radius:26px}.canvas-card{padding:18px}.canvas-head{justify-content:space-between;gap:12px}.canvas-head h2,.panel h3{letter-spacing:-.025em;margin:4px 0 0;font-size:19px}.head-actions{gap:8px}.speed-chip,.play-btn{border:1px solid var(--line);color:var(--ink);cursor:pointer;background:#fff;border-radius:14px;padding:9px 13px}.play-btn.on{color:#fff;background:#173047;border-color:#173047}.stage-wrap{margin-top:16px;position:relative}.stage-wrap canvas{border-radius:24px;width:100%;display:block}.scale-pill{z-index:2;color:#527382;letter-spacing:.04em;background:#ffffffe0;border:1px solid #d7e9f0;border-radius:999px;padding:7px 10px;font-size:9px;font-weight:900;position:absolute;top:12px;right:14px;box-shadow:0 6px 18px #19516914}.motion-pill{white-space:nowrap;background:#ffffffeb;border:1px solid #d7e9f0;border-radius:999px;align-items:center;gap:12px;padding:9px 14px;font-size:11px;display:flex;position:absolute;bottom:13px;left:50%;transform:translate(-50%);box-shadow:0 10px 30px #19516921}.below-grid{grid-template-columns:minmax(315px,.92fr) minmax(350px,1.08fr);gap:18px;margin-top:18px;display:grid}.panel{padding:18px}.panel-head{justify-content:space-between;gap:12px}.tiny-badge{letter-spacing:.12em;color:#4f7f2b;background:#ebf8dd;border-radius:999px;padding:6px 8px;font-size:9px;font-weight:950}.formula-chip{border:1px solid var(--line);color:#55778b;background:#f2f8fc;border-radius:10px;padding:6px 9px;font-size:11px}.presets{grid-template-columns:repeat(3,1fr);gap:8px;margin:16px 0 17px;display:grid}.presets button{text-align:left;border:1px solid var(--line);color:var(--ink);cursor:pointer;background:#fbfeff;border-radius:14px;grid-template-columns:24px 1fr;align-items:center;gap:5px;padding:10px;display:grid}.presets button.selected{background:#eef9ff;border-color:#8ed7e8;box-shadow:inset 0 0 0 1px #8ed7e8}.presets span{grid-row:span 2;font-size:17px}.presets b{font-size:12px}.presets small{color:var(--muted);font-size:10px}.control{border-bottom:1px solid #e7f0f4;padding:11px 0}.control-head{justify-content:space-between;align-items:center;gap:12px;font-size:12px;display:flex}.control-head span{color:var(--muted)}.control-head b{font-size:12px}.control input{width:100%;accent-color:var(--blue);touch-action:pan-y;margin:9px 0 4px}.range-scale{color:#91a5af;justify-content:space-between;font-size:9px;display:flex}.switch-row{justify-content:space-between;align-items:center;gap:15px;padding:14px 0;display:flex}.switch-row b,.switch-row small{display:block}.switch-row b{font-size:12px}.switch-row small{color:var(--muted);margin-top:3px;font-size:10px}.switch{cursor:pointer;background:#c8d5db;border:0;border-radius:99px;flex:none;width:47px;height:27px;padding:3px}.switch span{background:#fff;border-radius:50%;width:21px;height:21px;transition:transform .18s;display:block;box-shadow:0 2px 5px #14374633}.switch.on{background:var(--blue)}.switch.on span{transform:translate(20px)}.drag-controls{grid-template-columns:1fr 1fr;gap:0 12px;display:grid}.drag-controls .control:last-child{grid-column:1/-1}.metrics{grid-template-columns:repeat(2,1fr);gap:9px;margin:16px 0 12px;display:grid}.metrics div{background:#f5fbfd;border:1px solid #e3eef3;border-radius:17px;padding:14px}.metrics span{color:var(--muted);font-size:10px;display:block}.metrics b{letter-spacing:-.03em;margin-top:5px;font-size:24px;display:block}.metrics i{color:var(--muted);font-size:12px;font-style:normal}.equation-strip{color:#6b8290;background:#f4f8fb;border:1px solid #e1ecf1;border-radius:15px;flex-wrap:wrap;align-items:center;gap:8px;padding:12px 13px;font-size:11px;display:flex}.equation-strip b{color:var(--ink);margin-right:5px;font-size:12px}.explain{background:linear-gradient(135deg,#fff8e3,#f1ffea);border:1px solid #e6e5ca;border-radius:16px;gap:10px;margin-top:12px;padding:13px;display:flex}.explain-dot{color:#fff;background:#173047;border-radius:50%;flex:0 0 24px;place-items:center;width:24px;height:24px;font-weight:900;display:grid}.explain b{font-size:11px}.explain p{color:#697c84;margin:4px 0 0;font-size:10px;line-height:1.55}.footer{color:#7b909b;justify-content:space-between;align-items:center;gap:15px;padding:17px 4px 0;font-size:10px;display:flex}.maintainer{align-items:center;gap:7px;display:flex}.maintainer-mark{color:#fff;letter-spacing:.03em;background:linear-gradient(135deg,#173047,#2e84ef);border-radius:9px;place-items:center;width:27px;height:27px;font-size:9px;font-weight:950;display:grid;box-shadow:0 5px 13px #2e84ef33}.maintainer b{color:#4a6674}@media (max-width:980px){.lab-grid{grid-template-columns:1fr}.sidebar{align-items:center;gap:8px;padding:11px;display:flex;overflow:auto}.side-title{display:none}.experiment{min-width:205px}.side-note{display:none}.below-grid{grid-template-columns:1fr}.hero-orbit{display:none}}@media (max-width:680px){.scale-pill{text-align:center;max-width:62%;font-size:8px;line-height:1.2;top:9px;right:9px}.app-shell{padding:14px 12px 24px}.topbar{padding-bottom:8px}.top-actions{font-size:0}.top-actions .status-dot{margin-right:2px}.desktop-only{display:none}.hero{padding:23px 3px 24px}.hero h1{font-size:clamp(41px,14vw,62px)}.hero p{font-size:14px}.canvas-card,.panel{border-radius:21px;padding:13px}.canvas-head h2{font-size:17px}.play-btn,.speed-chip{padding:8px 10px}.play-btn span{display:none}.motion-pill{gap:8px;max-width:calc(100% - 16px);padding:8px 10px;font-size:9px;bottom:8px;overflow:hidden}.motion-pill span{flex:none}.drag-controls{grid-template-columns:1fr}.drag-controls .control:last-child{grid-column:auto}.metrics b{font-size:21px}.presets button{padding:8px}.footer{flex-wrap:wrap;font-size:9px}.maintainer{order:3;justify-content:center;width:100%}}@media (max-width:390px){.motion-pill span:nth-of-type(3),.motion-pill span:nth-of-type(4){display:none}.presets{gap:6px}.presets button{grid-template-columns:19px 1fr}.presets span{font-size:14px}}