:root{--bg:#121212;--fg:#f2f2f2;--muted:#9a9a9a;--accent:#ff2a2a;--panel:#1e1e1e;--border:#333;--ok:#3fb950;--warn:#d29922;--err:#f85149;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--fg);-webkit-text-size-adjust:100%;margin:0;font:16px/1.4 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}main{max-width:560px;margin:0 auto;padding:16px}h1{margin:.5rem 0 .25rem;font-size:1.5rem}p.lead{color:var(--muted);margin-top:0}.hidden{display:none!important}label{margin:12px 0 4px;font-weight:600;display:block}label small{color:var(--muted);font-weight:400}input,select{border:1px solid var(--border);background:var(--panel);width:100%;color:var(--fg);border-radius:8px;padding:10px 12px;font-size:1rem}.row2{grid-template-columns:1fr 1fr;gap:12px;display:grid}button{border:1px solid var(--border);background:var(--panel);color:var(--fg);cursor:pointer;border-radius:10px;padding:14px 18px;font-size:1.1rem;font-weight:600}button.primary{background:var(--accent);border-color:var(--accent);color:#fff;width:100%;margin-top:20px}button:disabled{opacity:.5}.note{background:var(--panel);border:1px solid var(--border);border-radius:10px;margin:16px 0;padding:12px;font-size:.95rem}.note ul{margin:.25rem 0 0;padding-left:1.2rem}ol.steps{padding:0;list-style:none}ol.steps li{background:var(--panel);border-left:4px solid var(--border);border-radius:8px;margin:6px 0;padding:10px 12px}ol.steps li.active{border-left-color:var(--warn)}ol.steps li.done{border-left-color:var(--ok)}ol.steps li.fail{border-left-color:var(--err)}ol.steps li .detail{color:var(--muted);font-size:.9rem;display:block}#run{flex-direction:column;justify-content:space-between;display:flex;position:fixed;inset:0}#cell{background:var(--bg);position:absolute;inset:0}#hud{color:#ddd;text-shadow:0 1px 2px #000;white-space:pre-wrap;padding:12px 16px;font:13px/1.35 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;position:relative}#controls{padding:16px;padding-bottom:max(16px, env(safe-area-inset-bottom));gap:10px;display:flex;position:relative}#controls button{background:#1e1e1ed9;flex:1}#fireBtn{font-size:1.4rem;border-color:var(--accent)!important;background:#ff2a2a40!important;flex:2!important}.walk-big{text-align:center;font-variant-numeric:tabular-nums;margin:16px 0 0;font-size:4.5rem;font-weight:700}.walk-sub{text-align:center;color:var(--muted);min-height:1.5em;font-size:1.1rem}.walk-info{color:var(--muted);white-space:pre-wrap;margin:16px 0;font:13px/1.4 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}table.stats{border-collapse:collapse;margin-top:6px}table.stats td,table.stats th{text-align:left;padding:2px 10px 2px 0}.instructor main{max-width:1100px}.instructor .grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;display:grid}@media (width<=800px){.instructor .grid{grid-template-columns:1fr}}#qr{background:#fff;border-radius:12px;width:100%;max-width:480px;height:auto;padding:16px}#joinUrl{word-break:break-all;color:var(--muted);font-size:.9rem}#syncStatus{white-space:pre-wrap;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9rem}