:root{color-scheme:dark;--bg:#08182b;--surface:#11263c;--panel:#0e2035;--stroke:#2c4760;--muted:#a3b6c9;--ink:#eaf3ff;--blue:#66b8ed}
*{box-sizing:border-box}body{margin:0;background:transparent;color:var(--ink);font-family:Inter,system-ui,-apple-system,Segoe UI,Arial,sans-serif;line-height:1.45}.engine-app{padding:4px 2px 18px;max-width:1440px;margin:auto}.eyebrow{font-size:10px;letter-spacing:.13em;font-weight:800;color:#7dbadf}.hero{display:flex;gap:12px;align-items:flex-start;justify-content:space-between;margin-bottom:15px}.hero h1{font-size:clamp(24px,4.5vw,31px);line-height:1.1;margin:6px 0}.hero p,.aside-head p{color:var(--muted);margin:0;font-size:12px;max-width:700px}.demo-tag{white-space:nowrap;border:1px solid #335d7f;border-radius:100px;color:#a7d6f7;font-weight:800;letter-spacing:.05em;font-size:10px;padding:7px 10px;margin-top:2px}
.viewer-layout{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(240px,.85fr);gap:14px}.view-column{min-width:0}.viewport{background:radial-gradient(ellipse at 52% 45%,#274563 0%,#0a1c31 53%,#071525 100%);position:relative;overflow:hidden;border:1px solid var(--stroke);border-radius:18px;min-height:350px;height:min(46vw,530px);touch-action:none;user-select:none}.viewport canvas{display:block;width:100%;height:100%;cursor:grab;touch-action:none}.viewport canvas:active{cursor:grabbing}.view-top,.view-bot{position:absolute;pointer-events:none;left:13px;right:13px;display:flex;gap:8px;justify-content:space-between;align-items:center}.view-top{top:13px}.view-bot{bottom:12px;color:#a8c5df;font-size:10px;letter-spacing:.01em}.view-live{font-size:10px;font-weight:800;color:#cde8ff;background:#10293cbf;padding:8px 10px;border:1px solid #395879;border-radius:30px}.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#3be7af;margin-right:6px}.view-reset{pointer-events:auto;border-radius:9px;border:1px solid #426989;background:#17354dcc;color:#e3f1ff;font-size:11px;font-weight:700;padding:8px 9px;cursor:pointer}.view-reset:focus-visible,.control-buttons button:focus-visible,.part-item:focus-visible{outline:2px solid #8cdbff;outline-offset:3px}.fallback{position:absolute;inset:15%;background:#10263fea;border:1px solid #517a9d;border-radius:16px;padding:20px;display:flex;flex-direction:column;justify-content:center;text-align:center}.fallback[hidden]{display:none}.fallback p{color:var(--muted);font-size:12px}.engine-controls{background:var(--surface);border:1px solid var(--stroke);border-radius:16px;padding:17px;margin-top:12px}.control-head{display:flex;justify-content:space-between;font-size:12px;font-weight:800}.control-head output{color:#8bc7f0;font-variant-numeric:tabular-nums}input[type=range]{width:100%;accent-color:#64b7e7;margin:15px 0}.control-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.control-buttons button{cursor:pointer;background:#152e48;border:1px solid #345371;color:#c9d9eb;font-weight:750;border-radius:11px;padding:10px 5px;font-size:11px}.control-buttons button.active{background:#2a6495;border-color:#7bc7fe;color:#fff}.toggle-row{display:flex;gap:18px;flex-wrap:wrap;margin-top:13px;color:#c9daeb;font-size:11px}.toggle-row label{display:flex;align-items:center;gap:7px;cursor:pointer}.toggle-row input{accent-color:#56afe2}.engine-aside{background:var(--panel);border:1px solid var(--stroke);border-radius:17px;padding:16px;min-width:0}.aside-head h2{font-size:17px;margin:4px 0 4px}.part-list{display:grid;gap:7px;margin:16px 0}.part-item{text-align:left;cursor:pointer;display:flex;gap:11px;align-items:center;border:1px solid #2a445c;border-radius:11px;background:#142b40;color:var(--ink);padding:9px 10px;width:100%;font:inherit}.part-item.active{background:#204b71;border-color:#67b6ed;box-shadow:inset 3px 0 0 #8fd9ff}.part-index{color:#8bbddd;font-size:11px;font-weight:800;min-width:22px}.part-text{min-width:0;display:grid}.part-text strong{font-size:12px;line-height:1.25}.part-text small{color:var(--muted);font-size:10px}.part-detail{border-top:1px solid #33526c;padding-top:12px}.part-detail h3{margin:4px 0;font-size:16px}.part-detail p{margin:4px 0 10px;color:#cfdeef;font-size:12px}.part-detail .goal{background:#0b3148;border-radius:10px;padding:10px;font-size:11px;color:#afdaee;line-height:1.5}.engine-note{margin-top:14px;border:1px solid #3d5169;background:#102338;padding:12px 14px;border-radius:12px;color:#a9c1d9;font-size:11px}.engine-note strong{color:#e4f2ff}.outro{margin-top:10px;color:#87adc9;font-size:11px}.engine-aside .part-detail .accuracy{display:inline-block;border:1px solid #3a6880;border-radius:8px;color:#81cde8;padding:4px 6px;font-size:10px;font-weight:700;margin-bottom:7px}
@media(max-width:790px){.viewer-layout{grid-template-columns:1fr}.viewport{height:55vh;min-height:320px;max-height:470px}.engine-aside{padding:14px}.part-list{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{flex-wrap:wrap}.demo-tag{font-size:9px}}
@media(max-width:480px){.viewport{height:320px;min-height:320px}.view-bot span:first-child{max-width:190px}.part-list{grid-template-columns:1fr 1fr;gap:6px}.part-item{padding:8px 7px;gap:4px}.part-index{min-width:17px}.part-text strong{font-size:11px}.part-text small{font-size:9px}.control-buttons button{font-size:10px}.engine-app{padding:2px 0 14px}.hero{gap:9px}.hero h1{font-size:23px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Respaldo en un lienzo independiente, válido incluso si el contexto WebGL falló a mitad de la inicialización. */
.viewport .engine-canvas-2d{position:absolute;inset:0;z-index:1;display:block;width:100%;height:100%;pointer-events:none;}
.view-top,.view-bot{z-index:3;}
.fallback{z-index:4;}
.render-note{border:1px solid #396487;background:#112f47;color:#b6dff7;border-radius:10px;margin-top:9px;padding:10px 12px;font-size:11px;}
.render-note[hidden]{display:none;}