:root{--bg: #0d1117;--bg-elev: #161b22;--bg-elev2: #1c2230;--border: #2a3140;--text: #e6edf3;--text-muted: #8b949e;--accent: #2dd4bf;--accent-dim: #14b8a6;--danger: #f85149;--radius: 10px;--shadow: 0 4px 18px rgba(0, 0, 0, .4)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:15px}a{color:var(--accent)}button{font-family:inherit;cursor:pointer;border:1px solid var(--border);background:var(--bg-elev);color:var(--text);border-radius:var(--radius);padding:8px 14px;transition:background .15s,border-color .15s}button:hover{background:var(--bg-elev2);border-color:var(--accent-dim)}button.primary{background:var(--accent);color:#04201d;border-color:var(--accent);font-weight:600}button.primary:hover{background:var(--accent-dim)}.app{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;align-items:center;gap:16px;padding:14px 24px;border-bottom:1px solid var(--border);background:var(--bg-elev)}.header-left{display:flex;align-items:baseline;gap:16px}.header-right{margin-left:auto;display:flex;align-items:center;gap:12px}.header-link{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:13px;padding:4px 8px;border-radius:6px;transition:all .15s}.header-link:hover{color:var(--accent);background:var(--accent-dim)}.app-header h1{margin:0;font-size:22px;letter-spacing:.5px;color:var(--accent)}.app-header .tagline{margin:0;color:var(--text-muted);font-size:13px}.difficulty-badge-header{background:var(--accent);color:#000;padding:3px 10px;border-radius:12px;font-size:12px;font-weight:600}.streak-badge{font-size:13px;font-weight:600}.back-btn{margin-left:auto}.app-main{flex:1;padding:20px;max-width:1600px;width:100%;margin:0 auto}.error-banner{background:#f851491f;border:1px solid var(--danger);color:var(--danger);padding:8px 16px;border-radius:var(--radius);margin:12px 24px}.muted{color:var(--text-muted)}.home{display:flex;flex-direction:column;gap:24px;max-width:900px;margin:0 auto}.hero-section{text-align:center;padding:48px 24px 32px}.hero-title{font-size:2rem;margin:0 0 8px;color:var(--text)}.hero-subtitle{font-size:15px;color:var(--text-muted);max-width:500px;margin:0 auto 24px}.play-btn{background:var(--accent);color:var(--bg);border:none;border-radius:12px;padding:14px 48px;font-size:18px;font-weight:700;cursor:pointer;transition:all .15s;letter-spacing:1px;display:inline-flex;align-items:center;gap:10px}.play-btn:hover{filter:brightness(1.1);transform:translateY(-1px)}.play-btn__icon{font-size:20px;line-height:1}.play-btn--heartbeat{animation:heartbeat 6s ease-in-out infinite}.play-btn--heartbeat:hover{animation:none}@keyframes heartbeat{0%{transform:scale(1)}4%{transform:scale(1.03)}8%{transform:scale(1)}16%{transform:scale(1.04)}28%{transform:scale(1)}to{transform:scale(1)}}@media(prefers-reduced-motion:reduce){.play-btn--heartbeat{animation:none}}.difficulty-page{max-width:700px;margin:0 auto;padding:24px}.difficulty-page h2{margin:0 0 4px;font-size:1.5rem}.difficulty-subtitle{color:var(--text-muted);font-size:14px;margin:0 0 24px}.difficulty-actions{display:flex;justify-content:space-between;align-items:center;margin-top:24px;gap:24px}.difficulty-actions .back-btn{margin-left:0}.difficulty-slider-wrap{margin:24px 0}.difficulty-slider{position:relative;height:48px;margin:0 24px;cursor:pointer;touch-action:none;outline:none}.difficulty-slider:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:4px}.difficulty-track{position:absolute;top:50%;left:0;right:0;height:6px;background:var(--bg-elev2);border-radius:3px;transform:translateY(-50%)}.difficulty-fill{position:absolute;top:50%;left:0;height:6px;background:var(--accent);border-radius:3px;transform:translateY(-50%);transition:width .1s ease-out}.difficulty-tick{position:absolute;top:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;pointer-events:none}.difficulty-tick-dot{width:12px;height:12px;border-radius:50%;background:var(--bg-elev2);border:2px solid var(--border);transition:all .15s}.difficulty-tick.active .difficulty-tick-dot{background:var(--accent);border-color:var(--accent)}.difficulty-tick-num{position:absolute;top:20px;font-size:11px;color:var(--text-muted);font-weight:600}.difficulty-tick.active .difficulty-tick-num{color:var(--accent)}.difficulty-thumb{position:absolute;top:50%;transform:translate(-50%,-50%);transition:left .1s ease-out;pointer-events:none;z-index:2}.difficulty-thumb-circle{width:22px;height:22px;border-radius:50%;background:var(--accent);border:3px solid var(--bg);box-shadow:0 2px 8px #0000004d}.difficulty-preview{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-top:24px}.difficulty-preview-header{display:flex;align-items:center;gap:12px;margin-bottom:12px}.difficulty-preview-level{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.difficulty-preview-name{font-size:1.3rem;font-weight:700;color:var(--text)}.difficulty-preview-meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}.difficulty-badge{background:var(--bg-elev2);border:1px solid var(--border);border-radius:12px;padding:3px 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8px;font-size:14px;color:var(--text)}.level-up-btn{background:var(--accent);color:var(--bg);border:none;border-radius:8px;padding:8px 20px;font-size:14px;font-weight:600;cursor:pointer}.level-up-btn:hover{filter:brightness(1.1)}.preview-box{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.preview-box h3{margin:0 0 12px;font-size:1rem;color:var(--text-muted)}.preview-box .model-viewer{height:400px;border-radius:var(--radius);overflow:hidden}.mode-selector h2,.region-picker h3,.stats-panel h3,.guess-history h3,.description-card h3{margin:0 0 12px;font-size:16px}.mode-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.mode-card{display:flex;flex-direction:column;gap:6px;text-align:left;padding:16px}.mode-label{font-size:16px;font-weight:600;color:var(--accent)}.mode-desc{font-size:13px;color:var(--text-muted)}.region-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}.region-picker-subtitle{margin:0 0 16px;font-size:14px;color:var(--text-muted)}.region-card{padding:16px 12px;text-align:center;font-size:15px;font-weight:500;display:flex;flex-direction:column;gap:4px}.region-card-name{color:var(--text)}.region-card-count{font-size:12px;color:var(--text-muted);font-weight:400}.region-picker-header{margin-bottom:16px}.region-picker-header h3{margin:8px 0 4px}.system-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}.system-card{background:var(--bg-elev2);border:1px solid var(--border);border-radius:var(--radius);padding:16px 14px;cursor:pointer;transition:all .15s;display:flex;flex-direction:column;gap:4px;text-align:left}.system-card:hover{border-color:var(--accent);transform:translateY(-1px)}.system-card-icon{font-size:24px;line-height:1}.system-card-name{font-size:16px;font-weight:600;color:var(--accent)}.system-card-desc{font-size:13px;color:var(--text-muted);line-height:1.4}.system-card-count{font-size:12px;color:var(--text-muted);margin-top:4px}.stats-panel{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:12px}.stat{display:flex;flex-direction:column;align-items:center;background:var(--bg-elev2);border-radius:8px;padding:10px}.stat-num{font-size:22px;font-weight:700;color:var(--accent)}.stat-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.game-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;height:calc(100vh - 140px);min-height:500px}@media(max-width:900px){.game-layout{grid-template-columns:1fr;height:auto}}.viewer-pane{position:relative;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;min-height:400px}.model-viewer{position:absolute;top:0;right:0;bottom:0;left:0}.model-viewer-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:var(--text-muted);pointer-events:none}.model-viewer-loading{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;pointer-events:none}.model-viewer-loading .spinner{width:48px;height:48px;border:4px solid var(--bg-elev2);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.viewer-pane .color-legend{position:absolute;bottom:12px;left:12px;background:#0d1117b3;padding:6px 10px;border-radius:8px}.side-pane{display:flex;flex-direction:column;gap:14px;overflow-y:auto;padding-right:4px}.mode-info{display:flex;align-items:center;gap:12px}.mode-badge{text-transform:capitalize;background:var(--accent);color:#04201d;font-weight:600;font-size:12px;padding:4px 10px;border-radius:999px}.region-badge{background:#6366f126;color:#a5b4fc;font-weight:500;font-size:11px;padding:3px 8px;border-radius:999px;border:1px solid rgba(99,102,241,.3)}.category-badge{background:#22c55e1f;color:#86efac;font-weight:500;font-size:11px;padding:3px 8px;border-radius:999px;border:1px solid rgba(34,197,94,.25)}.speed-score-badge{background:#fbbf2426;color:#fbbf24;font-weight:600;font-size:13px;padding:4px 10px;border-radius:999px;border:1px solid rgba(251,191,36,.3)}.speed-prompt{background:#fbbf241a;color:#fde68a;font-weight:600;font-size:14px;padding:10px 14px;border-radius:8px;border:1px solid rgba(251,191,36,.25);text-align:center;margin-bottom:12px;animation:pulse-highlight 2s ease-in-out infinite}.speed-done{background:#6366f11f;color:#a5b4fc;font-weight:600;font-size:15px;padding:14px;border-radius:8px;border:1px solid rgba(99,102,241,.25);text-align:center;margin-bottom:12px}@keyframes pulse-highlight{0%,to{opacity:1}50%{opacity:.7}}.guess-bar{position:relative}.pass-btn{display:block;width:100%;margin-top:8px;padding:7px 12px;font-size:13px;font-weight:500;color:var(--text-muted);background:transparent;border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:all .15s ease}.pass-btn:hover{color:var(--accent);border-color:var(--accent-dim);background:#2dd4bf0d}.guess-bar-header{display:flex;justify-content:flex-end;margin-bottom:4px}.guess-autocorrect-toggle{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none}.guess-autocorrect-toggle input{position:absolute;opacity:0;width:0;height:0;margin:0}.guess-autocorrect-track{position:relative;width:28px;height:16px;border-radius:8px;background:var(--border);transition:background .2s ease;flex-shrink:0}.guess-autocorrect-track:after{content:"";position:absolute;top:2px;left:2px;width:12px;height:12px;border-radius:50%;background:#b8a8a0;transition:transform .2s ease,background .2s ease}.guess-autocorrect-toggle input:checked+.guess-autocorrect-track{background:var(--accent-dim)}.guess-autocorrect-toggle input:checked+.guess-autocorrect-track:after{transform:translate(12px);background:var(--accent)}.guess-autocorrect-toggle input:focus-visible+.guess-autocorrect-track{outline:2px solid var(--accent);outline-offset:2px}.guess-input-wrap{position:relative}.guess-input-wrap input{width:100%;padding:12px 14px;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:15px;transition:border-color .2s}.guess-input-wrap input:focus{outline:none;border-color:var(--accent)}.guess-input-wrap.error input{border-color:var(--danger);animation:shake .4s ease}.guess-input-wrap.error input:focus{border-color:var(--danger)}.guess-error-icon{position:absolute;right:10px;top:50%;transform:translateY(-50%);color:var(--danger);font-size:18px;cursor:help;line-height:1}.guess-error-msg{margin:6px 2px 0;font-size:13px;color:var(--danger);animation:fade-in .2s ease}.guess-suggestions{position:absolute;top:100%;left:0;right:0;background:var(--bg-elev);border:1px solid var(--border);border-top:none;border-radius:0 0 var(--radius) var(--radius);max-height:280px;overflow-y:auto;z-index:50;box-shadow:0 4px 12px #0003}.guess-suggestion{display:block;width:100%;padding:10px 14px;background:none;border:none;border-bottom:1px solid var(--border);color:var(--text);font-size:14px;text-align:left;cursor:pointer;transition:background .1s}.guess-suggestion:last-child{border-bottom:none}.guess-suggestion:hover{background:var(--accent-dim)}.guess-suggestion-region{font-size:11px;color:var(--text-muted);white-space:nowrap;margin-left:12px}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.suggestions{position:absolute;top:100%;left:0;right:0;background:var(--bg-elev2);border:1px solid var(--border);border-radius:0 0 var(--radius) var(--radius);list-style:none;margin:4px 0 0;padding:0;max-height:280px;overflow-y:auto;z-index:10;box-shadow:var(--shadow)}.suggestions li{display:flex;justify-content:space-between;padding:10px 14px;cursor:pointer}.suggestions li.active,.suggestions li:hover{background:#2dd4bf1f}.sugg-region{color:var(--text-muted);font-size:12px}.guess-history{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:14px;flex:1;min-height:120px}.guess-history ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.guess-row{display:flex;align-items:center;gap:10px;padding:8px 10px;background:var(--bg-elev2);border-radius:8px;animation:slide-in .25s ease}@keyframes slide-in{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.swatch{width:16px;height:16px;border-radius:4px;border:1px solid rgba(255,255,255,.15);flex-shrink:0}.guess-name{flex:1}.guess-prox{color:var(--text-muted);font-size:12px}.description-card{background:var(--bg-elev);border:1px solid var(--accent-dim);border-radius:var(--radius);padding:14px}.description-card p{margin:0;line-height:1.5}.speed-setup{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:24px;max-width:420px}.speed-setup h3{margin:0 0 8px}.speed-setup .muted{color:var(--text-muted);font-size:14px;margin:0 0 16px}.speed-presets{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.speed-preset{padding:10px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-elev2);color:var(--text);font-size:15px;cursor:pointer;transition:border-color .15s}.speed-preset:hover{border-color:var(--accent)}.speed-preset.active{border-color:var(--accent);background:var(--accent-dim);color:#000;font-weight:600}.speed-custom{margin-bottom:20px}.speed-custom label{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-muted)}.speed-custom input{width:70px;padding:6px 10px;background:var(--bg-elev2);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:15px}.speed-custom input:focus{outline:none;border-color:var(--accent)}.speed-actions{display:flex;justify-content:space-between;align-items:stretch;gap:12px}.speed-actions button{flex:1;display:flex;align-items:center;justify-content:center;padding:10px 24px;border-radius:var(--radius);font-weight:600;font-size:15px;cursor:pointer;text-align:center;margin:0;line-height:1.4;box-sizing:border-box;border:1px solid var(--border);min-height:42px}.speed-actions .back-btn{background:var(--bg-elev2);color:var(--text)}.speed-actions .back-btn:hover{border-color:var(--accent)}.speed-actions .primary{background:var(--accent);color:#04201d;border-color:var(--accent)}.speed-actions .primary:hover{opacity:.9}.timer-bar{position:relative;background:var(--bg-elev2);border-radius:999px;height:28px;overflow:hidden;flex:1;display:flex;align-items:center;border:1px solid var(--border)}.timer-fill{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,var(--accent),#f55c2d);transition:width .1s linear}.timer-text{position:relative;z-index:1;padding:0 12px;font-size:13px;font-weight:600;color:#fff;text-shadow:0 1px 2px rgba(0,0,0,.5)}.timer-done{margin-left:auto;padding-right:12px;color:var(--text)}.color-legend{display:flex;gap:4px;align-items:center}.legend-step{display:flex;align-items:center;gap:4px}.legend-swatch{width:18px;height:18px;border-radius:4px;border:1px solid rgba(255,255,255,.1)}.legend-label{font-size:11px;color:var(--text-muted)}.how-to-play{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px}.how-to-play h2{margin:0 0 12px;font-size:1.1rem}.how-to-play ol{margin:0;padding-left:20px;line-height:1.7;color:var(--text)}.how-to-play ul{margin:4px 0;padding-left:18px;list-style:disc}.how-to-play li{margin-bottom:6px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100;animation:fade-in .2s ease}.modal-card{background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;padding:28px 32px;max-width:720px;width:90vw;max-height:85vh;overflow-y:auto;box-shadow:0 8px 32px #0006}.modal-card .back-btn{margin-top:16px}.learn-modal{max-width:900px;max-height:90vh;position:relative}.learn-close{position:absolute;top:12px;right:16px;background:none;border:none;font-size:22px;color:var(--text-muted);cursor:pointer;padding:4px 8px;border-radius:6px;z-index:1}.learn-close:hover{color:var(--text);background:var(--bg-elev2)}.learn-modal .info-page-wrap{max-width:none;margin:0}.win-modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100;animation:fade-in .2s ease}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.win-modal{background:var(--bg-elev);border:1px solid var(--accent-dim);border-radius:16px;padding:28px 32px;text-align:center;max-width:420px;box-shadow:var(--shadow);animation:pop-in .25s ease}@keyframes pop-in{0%{transform:scale(.92);opacity:0}to{transform:scale(1);opacity:1}}.win-modal 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