:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;color:#edf4fb;background:#070d16;font-synthesis:none;--muted:#98a9bd;--line:#253247;--accent:#65d9ce}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,input,select,summary{-webkit-tap-highlight-color:transparent}button{min-height:44px;border:1px solid var(--line);border-radius:10px;background:#172335;color:inherit;padding:10px 14px;cursor:pointer}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button[aria-pressed=true],button.selected{color:#061a1b;background:var(--accent);border-color:var(--accent)}.primary{background:var(--accent);color:#061a1b;border-color:var(--accent);font-weight:650}.quiet{background:transparent;border-color:transparent;color:var(--muted)}[hidden]{display:none!important}label{display:flex;flex-direction:column;gap:9px;margin:18px 0;font-size:14px;color:#bac8d8}input:not([type=checkbox]):not([type=range]),select{width:100%;min-height:46px;border-radius:9px;border:1px solid #33435a;background:#101b2b;color:#edf4fb;padding:10px 12px;font-size:16px}input[type=checkbox]{accent-color:var(--accent);width:19px;height:19px}.check{flex-direction:row;align-items:center;gap:10px}input[type=range]{accent-color:var(--accent);width:100%;min-height:34px}.login-shell{min-height:100svh;display:grid;place-items:center;padding:28px;background:radial-gradient(ellipse at 50% 15%,#142e40,#070d16 65%)}.login-card{width:min(100%,360px)}.brand-mark{display:grid;place-items:center;width:48px;height:48px;border:1px solid #548e99;border-radius:14px;color:var(--accent);font-size:28px;font-weight:700}.eyebrow{letter-spacing:.18em;font-size:11px;color:var(--muted);margin:25px 0 8px}h1{font-size:28px;margin:0 0 30px}h2{font-size:20px;margin:0}.login-card .primary{width:100%;margin-top:8px}#login-message{color:#f9a7a7;min-height:24px;font-size:14px}#workspace{height:100svh;display:flex;flex-direction:column;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);overflow:hidden}.topbar{display:flex;align-items:center;gap:10px;padding:10px 12px;border-bottom:1px solid var(--line);flex-shrink:0;background:#0c1421}.topbar>button{padding:9px 10px;flex-shrink:0}.case-heading{min-width:0;display:flex;flex-direction:column;gap:4px;flex:1}.case-heading strong{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.case-heading span{font-size:11px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.stage{flex:1;min-height:145px;position:relative;overflow:hidden;background:#03070d}#three-host,#slice-canvas{position:absolute;width:100%;height:100%;inset:0}#three-host canvas{display:block;width:100%;height:100%;touch-action:none}#slice-canvas{touch-action:none}.stage-top{position:absolute;top:13px;left:14px;display:flex;gap:9px;pointer-events:none;font-size:12px;align-items:center}#sim-badge{background:#294643;color:#9df0dd;padding:5px 10px;border-radius:6px}#stage-status{color:#a9bed2;text-shadow:0 1px 5px #000}.floating{position:absolute;right:12px;top:12px;background:#101e2ad9;min-width:44px;font-size:23px;padding:4px 8px}#gesture-hint{position:absolute;bottom:12px;width:100%;text-align:center;pointer-events:none;font-size:11px;color:#9bb0c2}.view-tabs{display:flex;gap:6px;padding:10px;background:#0c1421;border-top:1px solid var(--line);flex-shrink:0}.view-tabs button{flex:1;padding:8px 5px;font-size:13px;white-space:nowrap}.drawer{color:inherit;background:#101b2a;border:1px solid var(--line);border-radius:18px 18px 0 0;width:min(100%,480px);max-width:100%;max-height:90svh;margin:auto auto 0;padding:20px 20px calc(20px + env(safe-area-inset-bottom));box-shadow:0 -10px 70px #0007}.drawer::backdrop{background:#0009}.drawer-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.drawer-heading button{background:transparent;border:0;font-size:18px}.case-item{display:flex;flex-direction:column;text-align:left;gap:8px;width:100%;margin:10px 0;padding:15px}.case-item small{color:var(--muted)}.case-item.selected small{color:#184345}.muted{color:var(--muted);font-size:13px;line-height:1.6}.structure-row{display:flex;gap:10px;align-items:center;margin:14px 0}.swatch{width:9px;height:9px;border-radius:50%;flex-shrink:0}details{border-top:1px solid var(--line);margin-top:22px;padding-top:16px}summary{cursor:pointer;min-height:35px}#notice{padding:10px 14px;font-size:13px;background:#422d20;color:#ffe0bb;flex-shrink:0}#slice-controls{position:absolute;bottom:8px;left:12px;right:12px;background:#0a1523de;border:1px solid var(--line);border-radius:12px;padding:8px 12px}.axis-picker{display:flex;gap:5px}.axis-picker button{flex:1;min-height:36px;padding:6px;font-size:12px}.slice-range{flex-direction:row;align-items:center;margin:4px 0;gap:12px}.slice-range span{min-width:62px;font-size:12px}#simulation-panel{padding:12px 14px;background:#101a28;border-top:1px solid var(--line);max-height:44svh;overflow:auto;flex-shrink:0}.sim-line{display:flex;gap:12px;align-items:center;font-size:12px}.sim-line strong{color:#88e9da}.sim-line span{color:#c2d2df}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin:14px 0}.metrics div{display:flex;flex-direction:column;gap:6px}.metrics span{font-size:10px;color:var(--muted)}.metrics strong{font-size:14px;font-variant-numeric:tabular-nums}.sim-actions,.sim-events{display:flex;gap:7px}.sim-actions button{flex:1}.sim-events{margin-top:8px;flex-wrap:wrap}.sim-events button{flex:1;white-space:nowrap;font-size:11px;padding:7px 8px;min-height:38px}@media(min-width:700px){.drawer{margin:auto 0 auto auto;height:100svh;max-height:100svh;border-radius:18px 0 0 18px;width:380px}.topbar{padding:12px 22px}.case-heading strong{font-size:16px}.view-tabs{justify-content:center}.view-tabs button{max-width:180px}#simulation-panel{padding:14px 24px}.metrics{max-width:700px}.sim-actions,.sim-events{max-width:700px}}@media(orientation:landscape) and (max-height:550px){#workspace{display:grid;grid-template-columns:1fr 265px;grid-template-rows:auto 1fr auto}.topbar{grid-column:1 / -1;padding:5px 10px}.stage{grid-column:1;grid-row:2 / 4}.view-tabs{grid-column:2;grid-row:3;flex-wrap:wrap}.view-tabs button{flex-basis:40%}#simulation-panel{grid-column:2;grid-row:2;max-height:none;padding:10px}.metrics{grid-template-columns:repeat(2,1fr);margin:10px 0}#notice{grid-column:1 / -1}.topbar button{min-height:36px}.sim-events button{flex-basis:40%}#workspace:not(.simulation-view){grid-template-columns:1fr;grid-template-rows:auto 1fr auto}#workspace:not(.simulation-view) .stage{grid-row:2}#workspace:not(.simulation-view) .view-tabs{grid-column:1;grid-row:3;flex-wrap:nowrap}#workspace:not(.simulation-view) .view-tabs button{flex-basis:auto}}

.load-error{position:absolute;z-index:3;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:#03070dee;text-align:center;padding:25px}.load-error p{font-size:15px;color:#bdcad8;max-width:290px;line-height:1.6}.load-error>div{display:flex;gap:10px}

.metrics-frame{grid-column:1/-1;color:#88e9da;font-size:11px;margin-bottom:3px}
#connection-diagnostics{position:fixed;z-index:30;bottom:8px;right:8px;width:min(94vw,620px);max-height:48svh;overflow:auto;margin:0;padding:10px;background:#101b2a;border:1px solid #33435a;border-radius:10px}#connection-diagnostics pre{font-size:10px;line-height:1.5;white-space:pre-wrap;overflow-wrap:anywhere;color:#b9cadb}#connection-diagnostics summary{font-size:12px;min-height:24px}

.teaching-link{color:#85e4d3;font-size:.8rem;text-decoration:none;white-space:nowrap;padding:.5rem}.teaching-link:focus-visible{outline:2px solid #85e4d3;outline-offset:2px}