:root{color-scheme:dark;--bg: #080b14;--bg-raise: #101728;--bg-raise-2: #17203a;--line: #24304f;--line-strong: #3a4a75;--text: #e8eefc;--text-dim: #9aabc9;--text-faint: #64748b;--accent: #60a5fa;--accent-strong: #3b82f6;--good: #4ade80;--warn: #fbbf24;--bad: #fb7185;--gold: #fde047;--radius: 12px;--radius-sm: 8px;--gap: 12px;--font: system-ui, -apple-system, "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-text-size-adjust:100%;overscroll-behavior:none}button,input,select,textarea{font:inherit;color:inherit}h1,h2,h3{margin:0 0 8px;line-height:1.25}h1{font-size:1.5rem}h2{font-size:1.15rem}h3{font-size:1rem}p{margin:0 0 8px}.app{min-height:100%;display:flex;flex-direction:column}.page{flex:1;width:100%;max-width:1600px;margin:0 auto;padding:16px;display:flex;flex-direction:column;gap:var(--gap)}.page--narrow{max-width:560px}.page--app{height:100dvh;overflow:hidden}.page--app>*{min-height:0}.topbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:10px 16px;background:var(--bg-raise);border-bottom:1px solid var(--line)}.topbar__title{font-weight:700;letter-spacing:-.01em}.topbar__spacer{flex:1}.card{background:var(--bg-raise);border:1px solid var(--line);border-radius:var(--radius);padding:14px}.card--tight{padding:10px}.stack{display:flex;flex-direction:column;gap:var(--gap)}.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.grow{flex:1}.muted{color:var(--text-dim);font-size:.9rem}.faint{color:var(--text-faint);font-size:.85rem}.btn{appearance:none;border:1px solid var(--line-strong);background:var(--bg-raise-2);color:var(--text);border-radius:var(--radius-sm);padding:10px 14px;min-height:44px;cursor:pointer;font-weight:600;transition:background .12s,border-color .12s}.btn:hover:not(:disabled){background:#1e2a48}.btn:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.btn:disabled{opacity:.45;cursor:not-allowed}.btn--primary{background:var(--accent-strong);border-color:var(--accent-strong);color:#04102a}.btn--primary:hover:not(:disabled){background:#5b9bf8}.btn--danger{border-color:#7f2d3d;color:var(--bad)}.btn--ghost{background:transparent;border-color:var(--line)}.btn--sm{min-height:34px;padding:5px 10px;font-size:.86rem;font-weight:500}.btn--big{min-height:56px;font-size:1.1rem;padding:12px 22px}.btn-group{display:inline-flex;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line-strong)}.btn-group .btn{border:0;border-radius:0;border-right:1px solid var(--line-strong)}.btn-group .btn:last-child{border-right:0}.btn-group .btn[aria-pressed=true]{background:var(--accent-strong);color:#04102a}.field{display:flex;flex-direction:column;gap:4px}.field>label{font-size:.85rem;color:var(--text-dim);font-weight:600}.input,.select,.textarea{background:var(--bg);border:1px solid var(--line-strong);border-radius:var(--radius-sm);padding:10px 12px;min-height:44px;width:100%}.input:focus-visible,.select:focus-visible,.textarea:focus-visible{outline:3px solid var(--accent);outline-offset:1px}.textarea{min-height:110px;resize:vertical;font-family:var(--font)}.input--code{font-size:1.8rem;letter-spacing:.35em;text-align:center;text-transform:uppercase;font-weight:700;padding:14px 12px;min-height:64px}.checkbox{display:flex;align-items:center;gap:8px;min-height:40px;cursor:pointer}.checkbox input{width:20px;height:20px;accent-color:var(--accent)}.notice{border-radius:var(--radius-sm);padding:10px 12px;border:1px solid var(--line-strong);background:var(--bg-raise-2);display:flex;gap:8px;align-items:flex-start}.notice--warn{border-color:#7a5b12;background:#2a2008;color:#fde68a}.notice--bad{border-color:#7f2d3d;background:#2c0f18;color:#fecdd3}.notice--good{border-color:#1d6b3f;background:#082418;color:#bbf7d0}.notice__icon{font-weight:700}.badge{display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:3px 10px;font-size:.8rem;font-weight:600;border:1px solid var(--line-strong);background:var(--bg-raise-2);white-space:nowrap}.badge--good{border-color:#1d6b3f;color:var(--good)}.badge--warn{border-color:#7a5b12;color:var(--warn)}.badge--bad{border-color:#7f2d3d;color:var(--bad)}.dot{width:8px;height:8px;border-radius:50%;background:currentColor;flex:none}.joincode{font-size:clamp(2rem,7vw,3.4rem);font-weight:800;letter-spacing:.22em;font-variant-numeric:tabular-nums;color:var(--gold);text-align:center;line-height:1.1}.joinbox{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.joinbox__qr{background:#fff;padding:8px;border-radius:var(--radius-sm);flex:none;line-height:0}.joinbox__qr canvas{display:block;width:168px;height:168px}.race{position:relative;flex:1;min-height:320px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#060812}.race__canvas{display:block;width:100%;height:100%}.race__overlay{position:absolute;inset:0;pointer-events:none}.race__overlay>*{pointer-events:auto}.race__minimap{position:absolute;right:10px;top:10px;width:96px;height:190px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);overflow:hidden;background:#060a16db}.race__minimap canvas{display:block;width:100%;height:100%}.race__controls{position:absolute;left:10px;bottom:10px;display:flex;gap:6px;flex-wrap:wrap;max-width:calc(100% - 20px)}.race__hud{position:absolute;left:10px;top:10px;display:flex;flex-direction:column;gap:6px;max-width:min(60%,460px)}.hud-card{background:#080c18d1;border:1px solid var(--line);border-radius:var(--radius-sm);padding:7px 11px;font-size:.9rem;backdrop-filter:blur(4px)}.hud-card strong{color:var(--gold)}.countdown{position:absolute;inset:0;display:grid;place-items:center;background:#04071099;font-size:clamp(4rem,18vw,12rem);font-weight:800;color:var(--gold);text-shadow:0 0 40px rgba(253,224,71,.4)}.countdown small{display:block;font-size:1rem;font-weight:600;color:var(--text);text-align:center;text-shadow:none}.leaderboard{display:flex;flex-direction:column;gap:2px;max-height:100%;overflow:auto}.lb-row{display:grid;grid-template-columns:2.4em 1fr auto;gap:8px;align-items:center;padding:4px 8px;border-radius:6px;font-size:.92rem}.lb-row--mine{background:#fde0471f;outline:1px solid rgba(253,224,71,.45)}.lb-row--done{color:var(--text-dim)}.lb-rank{font-variant-numeric:tabular-nums;color:var(--text-dim);text-align:right;font-weight:700}.lb-name{display:flex;align-items:center;gap:6px;min-width:0}.lb-name span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.swatch{width:12px;height:12px;border-radius:50%;flex:none;border:1px solid rgba(255,255,255,.35)}.map-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px}.map-card{background:var(--bg-raise-2);border:2px solid var(--line);border-radius:var(--radius);padding:8px;cursor:pointer;text-align:left;display:flex;flex-direction:column;gap:6px;color:inherit}.map-card:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.map-card[aria-pressed=true]{border-color:var(--accent);background:#16243f}.map-card__canvas{width:100%;height:132px;border-radius:var(--radius-sm);background:#060812;display:block}.map-card__title{display:flex;align-items:center;gap:6px;font-weight:700}.map-card__tags{display:flex;flex-wrap:wrap;gap:4px}.tag{font-size:.72rem;border:1px solid var(--line-strong);border-radius:999px;padding:1px 7px;color:var(--text-dim)}.table{width:100%;border-collapse:collapse;font-size:.92rem}.table th,.table td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--line)}.table th{color:var(--text-dim);font-size:.82rem;font-weight:600}.table tbody tr:last-child td{border-bottom:0}.winner-list{display:flex;flex-direction:column;gap:8px}.winner{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-sm);background:linear-gradient(90deg,#fde04729,#fde04708);border:1px solid rgba(253,224,71,.35)}.winner__rank{font-size:1.1rem;font-weight:800;color:var(--gold);min-width:2.6em}.winner__name{font-size:1.25rem;font-weight:700}.winner__award{margin-left:auto;font-weight:600;color:var(--accent)}.teacher-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:var(--gap);flex:1;min-height:0}.teacher-layout>main{min-height:0;overflow:auto}.teacher-side{display:flex;flex-direction:column;gap:var(--gap);min-height:0;overflow:auto}@media(max-width:960px){.teacher-layout{grid-template-columns:1fr}}.play-layout{display:flex;flex-direction:column;gap:10px;flex:1;min-height:0}.play-layout .race{flex:1;min-height:46vh}@media(max-width:400px){.page{padding:10px}.race__minimap{width:68px;height:132px}.map-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;left:-9999px;top:0;z-index:100;background:var(--accent-strong);color:#04102a;padding:10px 14px;border-radius:0 0 var(--radius-sm) 0}.skip-link:focus{left:0}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}