:root{color-scheme:dark;--bg: #101419;--panel: rgba(17, 24, 31, .86);--text: #edf4f1;--muted: #9dacaa;--line: rgba(255, 255, 255, .14);--cyan: #66d9d0;--mint: #9ceb8f}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input{font:inherit}.gate-shell{min-height:100vh;display:grid;place-items:center;padding:22px;background:radial-gradient(circle at 22% 18%,rgba(102,217,208,.16),transparent 28%),radial-gradient(circle at 78% 82%,rgba(246,198,91,.14),transparent 32%),linear-gradient(145deg,#101419,#17212a 52%,#101419)}.gate-panel{width:min(100%,420px);display:grid;gap:16px;border:1px solid var(--line);border-radius:8px;padding:22px;background:#11181feb;box-shadow:0 24px 80px #00000059}.gate-panel h1{margin:0;font-size:30px;line-height:1.08;letter-spacing:0}.gate-panel p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}.gate-form{display:grid;gap:10px}.gate-form label{color:var(--text);font-size:13px;font-weight:700}.gate-form input{width:100%;border:1px solid var(--line);border-radius:6px;color:var(--text);background:#ffffff0f;padding:11px 12px;outline:none}.gate-form input:focus{border-color:var(--cyan)}.gate-error{color:#f28c8c;font-size:13px;line-height:1.4}.app-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr) 360px;background:radial-gradient(circle at 20% 20%,rgba(102,217,208,.18),transparent 28%),radial-gradient(circle at 70% 10%,rgba(246,198,91,.15),transparent 30%),linear-gradient(145deg,#101419,#17212a 48%,#101419)}.stage{position:relative;min-height:100vh;overflow:hidden}.stage>div:first-child{width:100%;height:100%}.stage canvas{display:block;width:100%;height:100%}.hud{position:absolute;left:24px;right:24px;top:20px;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;pointer-events:none}.brand h1{margin:0;font-size:32px;line-height:1.05;letter-spacing:0}.eyebrow{display:block;margin-bottom:8px;color:var(--cyan);font-size:12px;font-weight:700;letter-spacing:0;text-transform:uppercase}.brand p,.status-pill{margin:8px 0 0;color:var(--muted);font-size:14px;max-width:560px}.status-pill{padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:#0b1015b3;white-space:nowrap}.stage-explainer{position:absolute;left:24px;right:24px;bottom:150px;display:grid;gap:7px;max-width:480px;padding:12px;border:1px solid var(--line);border-radius:8px;background:#0b1015bd;pointer-events:none}.stage-explainer strong{color:var(--text);font-size:13px}.stage-explainer span{color:var(--muted);font-size:13px;line-height:1.4}.stage-explainer p{margin:0;color:var(--text);font-size:13px;line-height:1.4}.stage-progress{height:7px;overflow:hidden;border-radius:999px;background:#ffffff1a}.stage-progress span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--cyan),var(--mint));transition:width .18s ease}.stage-progress.team span{background:linear-gradient(90deg,#f6c65b,#f28c8c)}.concept-legend{position:absolute;left:24px;bottom:22px;display:grid;gap:8px;padding:10px;border:1px solid var(--line);border-radius:8px;background:#0b1015b8;pointer-events:none}.legend-item{display:flex;align-items:center;gap:8px;color:var(--text);font-size:12px}.legend-item span{width:10px;height:10px;border-radius:999px;box-shadow:0 0 12px currentColor}.sidebar{min-height:100vh;border-left:1px solid var(--line);background:var(--panel);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:22px;display:flex;flex-direction:column;gap:18px}.section{border-bottom:1px solid var(--line);padding-bottom:18px}.section:last-child{border-bottom:0;padding-bottom:0}.section h2{margin:0 0 10px;font-size:15px;letter-spacing:0}.section p,.hint,.marker-meta{color:var(--muted);font-size:13px;line-height:1.5}.concept-card{display:grid;gap:12px}.concept-card p{margin:0;color:var(--text)}.concept-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px}.concept-tab{border:1px solid var(--line);border-radius:6px;color:var(--muted);background:#ffffff0d;min-height:38px;padding:8px;cursor:pointer}.concept-tab.active{border-color:#f6c65b80;color:var(--text);background:#f6c65b21}.region-list{display:grid;gap:8px}.interaction-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px}.tab{border:1px solid var(--line);border-radius:6px;color:var(--muted);background:#ffffff0d;min-height:38px;padding:8px;cursor:pointer}.tab.active{border-color:#66d9d08c;color:var(--text);background:#66d9d024}.progress-card{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;padding:10px;background:#ffffff0a}.progress-card div{display:grid;gap:4px}.progress-card strong{color:var(--mint);font-size:13px}.progress-card span{color:var(--muted);font-size:12px;line-height:1.4}.team-card{display:grid;gap:8px}.teammate{display:grid;gap:3px;border:1px solid var(--line);border-radius:8px;padding:8px 10px;background:#ffffff0a;opacity:.58}.teammate.active{border-color:#f6c65b73;background:#f6c65b1c;opacity:1}.teammate strong{color:#f6c65b;font-size:12px}.teammate span{color:var(--muted);font-size:12px;line-height:1.35}.lesson-panel{display:grid;gap:8px;border:1px solid rgba(102,217,208,.26);border-radius:8px;padding:12px;background:#66d9d014}.lesson-kicker{color:var(--cyan);font-size:11px;font-weight:700;text-transform:uppercase}.lesson-panel h3{margin:0;color:var(--text);font-size:15px;line-height:1.25}.lesson-panel p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}.lesson-panel strong{color:var(--mint);font-size:12px;line-height:1.4}.region-item{display:grid;gap:4px;border:1px solid var(--line);border-radius:8px;padding:10px;background:#ffffff0a}.region-item.complete{border-color:#9ceb8f57;background:#9ceb8f14}.region-item strong{color:var(--region-color, #f6c65b);font-size:12px}.region-item span{color:var(--muted);font-size:12px;line-height:1.4}.identity{display:grid;gap:8px}.identity input{width:100%;border:1px solid var(--line);border-radius:6px;color:var(--text);background:#ffffff0f;padding:10px 12px;outline:none}.identity input:focus{border-color:var(--cyan)}.identity-code{border:1px solid var(--line);border-radius:6px;background:#ffffff0d;padding:8px 10px;color:var(--cyan);font-family:ui-monospace,SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:12px;overflow-wrap:anywhere}.marker-form{display:grid;gap:10px}.marker-form input{width:100%;border:1px solid var(--line);border-radius:6px;color:var(--text);background:#ffffff0f;padding:10px 12px;outline:none}.marker-form input:focus{border-color:var(--cyan)}.marker-status{border:1px solid rgba(102,217,208,.22);border-radius:6px;color:var(--cyan);background:#66d9d014;padding:8px 10px;font-size:12px;line-height:1.35}.marker-status.error{border-color:#f28c8c52;color:#f28c8c;background:#f28c8c17}.quick-notes{display:grid;gap:8px}.quick-note{width:100%;border:1px solid rgba(102,217,208,.2);border-radius:6px;color:var(--text);background:#66d9d014;padding:8px 10px;cursor:pointer;text-align:left;font-size:12px;line-height:1.35}.quick-note:hover{border-color:#66d9d08c}.button-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.button{border:1px solid var(--line);border-radius:6px;color:var(--text);background:#ffffff14;min-height:38px;padding:8px 10px;cursor:pointer}.button.primary{color:#08120f;border-color:transparent;background:var(--mint);font-weight:700}.button.demo{border-color:#f6c65b66;color:#f8ddb0;background:#f6c65b1f}.button:disabled{cursor:not-allowed;opacity:.45}.marker-list{display:grid;gap:10px;max-height:38vh;overflow:auto;padding-right:2px}.marker-item{border:1px solid var(--line);border-radius:8px;padding:10px;background:#ffffff0d}.marker-text{margin:0 0 8px;font-size:14px;line-height:1.4}.empty{border:1px dashed var(--line);border-radius:8px;padding:16px;color:var(--muted);font-size:13px}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.stage{min-height:58vh}.sidebar{min-height:auto;border-left:0;border-top:1px solid var(--line)}.hud{left:16px;right:16px;top:16px;display:grid}.brand h1{font-size:26px}.status-pill{justify-self:start;white-space:normal}.concept-legend{left:16px;bottom:16px}.stage-explainer{left:16px;right:16px;bottom:132px}}