:root{--bg: #F5F7FA;--card: #FFFFFF;--ink: #22283A;--ink-soft: #5B6770;--line: #D8DEE6;--navy: #1B2A4A;--navy-dark: #10203C;--steel: #2E74B5;--steel-dark: #205081;--crimson: #B23A48;--crimson-dark: #8A2C38;--gold: #C9A227;--gold-dark: #9C7E1E;--green: #2F7D4F;--green-soft: #E3F1E8;--amber-soft: #FBF1D9;--red-soft: #F8E3E5;--gray: #8A97A3;--ne: #2E74B5;--mid: #2F7D4F;--south: #B23A48;--radius: 12px}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);background-image:radial-gradient(ellipse at top,#EAF0F7 0%,var(--bg) 62%);color:var(--ink);font-size:16px;line-height:1.5}.app{max-width:1000px;margin:0 auto;padding:16px 14px 40px}h1{color:var(--navy);font-size:1.6rem;line-height:1.2}h2{color:var(--navy);font-size:1.2rem;margin-bottom:8px}h3{color:var(--navy);font-size:1.05rem;margin:14px 0 6px}p{margin:6px 0}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:14px 0;box-shadow:0 1px 4px #1b2a4a1a}.btn{font-family:inherit;font-size:1rem;font-weight:600;background:var(--navy);color:#fff;border:none;border-radius:10px;padding:12px 20px;cursor:pointer;margin:4px 6px 4px 0;min-height:44px}.btn:hover,.btn:focus-visible{background:var(--navy-dark)}.btn:focus-visible{outline:3px solid var(--gold);outline-offset:2px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.big{font-size:1.15rem;padding:14px 26px;width:100%}.btn.secondary{background:#fff;color:var(--steel);border:2px solid var(--steel)}.btn.secondary:hover{background:#eaf3fb}.btn.ghost{background:transparent;color:var(--steel);text-decoration:underline}.btn.danger{background:var(--crimson)}.btn.danger:hover{background:var(--crimson-dark)}.btn.small{font-size:.85rem;padding:7px 12px;min-height:34px}.btn-col{display:flex;flex-direction:column;gap:6px;margin-top:14px}.btn-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.btn-row.right{justify-content:flex-end}input[type=text],input[type=password],input:not([type]){font-family:inherit;font-size:1.1rem;padding:12px;width:100%;border:1.5px solid var(--line);border-radius:10px;margin:4px 0 14px;background:#fff}input:focus{outline:3px solid var(--gold);border-color:var(--steel)}label{font-weight:600;color:var(--ink-soft);font-size:.92rem}.err{color:var(--crimson);font-weight:600;min-height:1.3em;margin:6px 0}.muted{color:var(--ink-soft);font-size:.92rem}.note{background:#eaf3fb;border:1px solid #BBD6EC;border-radius:10px;padding:12px 14px;font-size:.95rem;margin:12px 0}.app-footer{text-align:center;color:var(--ink-soft);font-size:.8rem;margin-top:26px}.title-screen,.how-screen,.join-screen,.wait-card,.result-screen{max-width:640px;margin:20px auto}.title-screen{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-dark) 100%);border-color:var(--navy-dark);color:#fff}.title-screen .game-title{color:#fff}.title-screen .tagline{color:var(--gold)}.title-screen .title-blurb{color:#dce4f0}.game-title{font-size:2.1rem;letter-spacing:.01em;margin-top:12px;color:var(--navy)}.tagline{font-size:1.12rem;color:var(--steel);font-weight:700}.title-blurb{margin:10px 0 6px}.hero-art{width:100%;aspect-ratio:16/7;object-fit:cover;border-radius:10px;border:1px solid rgba(255,255,255,.25)}.art{display:block}.art-missing{width:100%;aspect-ratio:16/7;border-radius:10px;background:radial-gradient(circle at 25% 35%,rgba(46,116,181,.3),transparent 55%),radial-gradient(circle at 78% 68%,rgba(201,162,39,.25),transparent 55%),linear-gradient(160deg,#223559,#10203c);border:1px solid var(--line)}.how-list{margin:8px 0 8px 22px}.how-list li{margin:5px 0}.wait-card{text-align:center}.pulse-dot{width:18px;height:18px;border-radius:50%;background:var(--navy);margin:8px auto 14px;animation:pulse 1.4s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(.8);opacity:.5}50%{transform:scale(1.15);opacity:1}}.sort-match{max-width:640px;margin:0 auto}.sort-header{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:8px}.round-chip{background:#edf1f6;border:1px solid var(--line);padding:5px 12px;border-radius:999px;font-weight:700;color:var(--navy);font-size:.9rem}.progress-chip{background:#eaf3fb;border:1px solid var(--steel);color:var(--navy);padding:5px 12px;border-radius:999px;font-weight:700;font-size:.9rem}.streak-flame{margin-left:auto;font-weight:800;color:var(--gold-dark);background:var(--amber-soft);border:1px solid var(--gold);padding:4px 12px;border-radius:999px;font-size:.95rem}.streak-flame.mid{font-size:1.05rem}.streak-flame.big{font-size:1.2rem;animation:flamePulse .9s ease-in-out infinite}@keyframes flamePulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.sort-stage{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;min-height:280px;display:flex;align-items:center;justify-content:center}.progress-total{text-align:center;margin-top:10px}.round-intro-card{text-align:center;padding:10px 4px;max-width:480px}.event-kicker{font-size:.85rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--steel)}.round-intro-card h2{font-size:1.5rem;margin:4px 0 12px}.round-vocab{font-size:1.05rem;background:#eaf3fb;border:1px solid #BBD6EC;border-radius:10px;padding:12px 16px;margin:6px 0 18px}.sort-card-wrap{display:flex;flex-direction:column;align-items:center;gap:8px}.countdown-ring{width:56px;height:56px;margin-bottom:4px}.ring-track{fill:none;stroke:var(--line);stroke-width:5}.ring-fill{fill:none;stroke:var(--gold);stroke-width:5;stroke-linecap:round;transform-origin:30px 30px;transform:rotate(-90deg);stroke-dasharray:var(--circ);stroke-dashoffset:0;animation-name:ringCountdown;animation-timing-function:linear;animation-fill-mode:forwards}@keyframes ringCountdown{to{stroke-dashoffset:var(--circ)}}.sort-card{touch-action:none;cursor:grab;-webkit-user-select:none;user-select:none;background:#fff;border:2px solid var(--line);border-radius:16px;padding:26px 22px;max-width:420px;width:100%;min-height:130px;display:flex;align-items:center;justify-content:center;text-align:center;box-shadow:0 6px 18px #1b2a4a1f;transition:transform .22s ease}.sort-card.dragging{cursor:grabbing;transition:none;box-shadow:0 14px 30px #1b2a4a40;z-index:5}.sort-card.returning{transition:transform .24s ease}.sort-card.serious{border-color:var(--ink-soft)}.sort-card-text{font-size:1.15rem;font-weight:700;color:var(--navy);line-height:1.4}.sort-card-hint{font-size:.85rem;margin-top:2px;text-align:center}.buckets-row{display:flex;gap:10px;margin-top:16px}.bucket{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 10px;border-radius:12px;border:2px solid var(--line);background:#fff;cursor:pointer;min-height:88px;position:relative;font-family:inherit}.bucket:disabled{cursor:not-allowed;opacity:.6}.bucket:focus-visible{outline:3px solid var(--gold);outline-offset:2px}.bucket.ne{color:var(--ne)}.bucket.mid{color:var(--mid)}.bucket.south{color:var(--south)}.bucket:hover:not(:disabled){background:#f7f9fb;border-color:currentColor}.bucket-icon{font-size:1.8rem}.bucket-label{font-weight:800;font-size:.92rem;color:var(--ink)}.bucket-key{position:absolute;top:6px;right:8px;font-size:.7rem;font-weight:700;background:#edf1f6;border-radius:6px;padding:1px 6px;color:var(--ink-soft)}.bucket.glow-correct{border-color:var(--green);background:var(--green-soft);box-shadow:0 0 0 4px #2f7d4f40;animation:bucketGlow .5s ease-out}.bucket.glow-wrong{border-color:var(--crimson);box-shadow:0 0 0 3px #b23a4833}@keyframes bucketGlow{0%{transform:scale(.95)}60%{transform:scale(1.05)}to{transform:scale(1)}}.feedback-strip{text-align:center;padding:20px 14px;border-radius:12px;max-width:480px}.feedback-strip.right{background:var(--green-soft)}.feedback-strip.wrong{background:var(--red-soft)}.feedback-strip.serious{background:#edf1f6}.verdict-tag{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:1.1rem;padding:8px 16px;border-radius:999px;margin-bottom:10px;border:2px solid transparent;background:#fff}.verdict-tag.right{color:var(--green);border-color:var(--green)}.verdict-tag.wrong{color:var(--crimson);border-color:var(--crimson)}.verdict-tag.flash{animation:verdictFlash .5s ease-out}@keyframes verdictFlash{0%{transform:scale(.9)}40%{transform:scale(1.06)}to{transform:scale(1)}}.why-text{font-size:1.05rem;color:var(--ink)}.waiting-panel{text-align:center;padding:30px 10px}.result-headline{font-size:1.8rem;margin:4px 0 10px}.result-headline.tier-gold{color:var(--gold-dark)}.result-headline.tier-silver{color:var(--steel)}.result-headline.tier-bronze{color:var(--gold-dark);opacity:.85}.result-headline.tier-none{color:var(--ink-soft)}.medal-block{text-align:center;margin:10px 0 16px}.medal-art{width:130px;height:130px;object-fit:contain;margin:0 auto;display:block}.medal-icon-fallback{font-size:4rem;line-height:1}.medal-label{font-weight:800;color:var(--navy);margin-top:6px}.fall-note{font-size:1.02rem;color:var(--ink-soft);border-left:4px solid var(--gold);padding:4px 0 4px 12px;margin:10px 0}.accuracy-block{display:flex;gap:16px;align-items:center;background:var(--card);border:2px solid var(--steel);border-radius:12px;padding:14px 18px;margin:14px 0}.accuracy-number{font-size:2.6rem;font-weight:900;color:var(--navy)}.round-bars{margin:16px 0;display:flex;flex-direction:column;gap:8px}.round-bar-row{display:grid;grid-template-columns:1fr 2fr auto;gap:10px;align-items:center}.round-bar-label{font-size:.9rem;font-weight:700;color:var(--ink-soft)}.round-bar-track{height:12px;background:#e7ecf2;border-radius:999px;overflow:hidden;border:1px solid var(--line)}.round-bar-fill{display:block;height:100%;background:var(--steel);border-radius:999px}.round-bar-num{font-weight:800;font-size:.9rem;text-align:right}.miss-review{margin-top:18px}.miss-list{list-style:none;display:flex;flex-direction:column;gap:10px;margin-top:10px}.miss-item{border-left:6px solid var(--crimson);background:var(--red-soft);border-radius:8px;padding:10px 14px}.miss-item.serious{border-left-color:var(--ink-soft);background:#edf1f6}.miss-text{font-weight:700;color:var(--navy)}.miss-answer{display:flex;flex-wrap:wrap;gap:10px;margin-top:4px;align-items:baseline}.miss-region-tag{font-weight:800;font-size:.85rem;padding:2px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}.miss-why{color:var(--ink-soft);font-size:.92rem}.teacher-app .row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}.gate-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.code-card{gap:16px}.code-display{font-family:Consolas,monospace;font-size:2.6rem;font-weight:800;letter-spacing:.14em;color:var(--navy);background:#eaf3fb;border:2px dashed var(--steel);border-radius:var(--radius);padding:10px 22px;display:inline-block;margin-top:4px}.switch{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--ink-soft);cursor:pointer}.switch input{width:20px;height:20px;accent-color:var(--navy)}.approval-row{border-bottom:1px solid var(--line);padding:8px 0}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;margin-top:8px}th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);font-size:.95rem}th{color:var(--ink-soft);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}td.num{font-weight:800}.row-actions{white-space:nowrap}.badge{display:inline-block;font-size:.76rem;font-weight:700;padding:3px 10px;border-radius:12px;color:#fff;white-space:nowrap;margin-left:4px}.badge.not_started{background:var(--gray)}.badge.in_progress{background:var(--gold-dark)}.badge.completed{background:var(--green)}.badge.pending{background:var(--crimson)}.conn-dot{display:inline-block;width:9px;height:9px;border-radius:50%}.conn-dot.on{background:var(--green)}.conn-dot.off{background:var(--gray)}.class-summary{display:flex;justify-content:center;margin-bottom:10px}.class-summary.single .summary-stat{min-width:220px}.summary-stat{border:1px solid var(--line);border-left:8px solid var(--navy);border-radius:10px;padding:14px 22px;background:#fff;text-align:center}.big-number{font-size:2rem;font-weight:900;color:var(--ink)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#10203c99;display:flex;align-items:center;justify-content:center;padding:16px;z-index:50}.dialog{max-width:440px}@media (max-width: 760px){.gate-grid{grid-template-columns:1fr}.game-title{font-size:1.8rem}.code-display{font-size:1.7rem}.accuracy-number{font-size:2rem}}@media (max-width: 420px){.app{padding:10px 8px 30px}.card{padding:14px}.buckets-row{gap:6px}.bucket{padding:10px 4px;min-height:76px}.bucket-icon{font-size:1.4rem}.bucket-label{font-size:.78rem}.sort-card{padding:18px 14px}.sort-card-text{font-size:1.02rem}.round-bar-row{grid-template-columns:1fr 1.4fr auto;gap:6px}.round-bar-label{font-size:.8rem}}