:root{--board-light: #ecd5b0;--board-dark: #a97a56;--board-light-selected: #f6f682cc;--board-dark-selected: #bbca2bcc;--highlight: rgba(0, 0, 0, .15);--bg-start: #0f0c29;--bg-mid: #1a1a3e;--bg-end: #24243e;--surface: rgba(255, 255, 255, .06);--surface-hover: rgba(255, 255, 255, .12);--surface-card: rgba(255, 255, 255, .07);--border: rgba(255, 255, 255, .08);--text: #f0f0f5;--text-muted: #9ca3af;--green: #10b981;--green-glow: rgba(16, 185, 129, .35);--blue: #3b82f6;--blue-glow: rgba(59, 130, 246, .35);--orange: #f59e0b;--orange-glow: rgba(245, 158, 11, .3);--red: #ef4444;--red-glow: rgba(239, 68, 68, .3);--purple: #8b5cf6;--purple-glow: rgba(139, 92, 246, .3);--sq: 68px;--radius: 16px;--radius-sm: 10px}*{box-sizing:border-box}body{margin:0;display:flex;justify-content:center;align-items:center;min-height:100vh;background:linear-gradient(135deg,var(--bg-start) 0%,var(--bg-mid) 50%,var(--bg-end) 100%);font-family:Inter,system-ui,-apple-system,sans-serif;color:var(--text);-webkit-font-smoothing:antialiased}#root{width:100%;display:flex;flex-direction:column;align-items:center;padding:30px 20px}.app-shell{width:100%;display:flex;flex-direction:column;align-items:center;gap:18px}.app-logo{width:auto;align-self:flex-start;display:inline-flex;align-items:center;gap:10px;padding:10px 16px;background:#ffffff14;border:1px solid rgba(255,255,255,.14);border-radius:999px;box-shadow:0 12px 30px #00000040}.app-logo:hover{transform:translateY(-1px);background:#ffffff1f}.app-logo-mark{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,#2563eb,#8b5cf6);box-shadow:0 8px 24px #3b82f659}.app-logo-text{font-size:14px;font-weight:800;letter-spacing:.4px}.chess-container{display:flex;flex-direction:column;gap:20px;align-items:center;padding:45px;background:var(--surface);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-radius:var(--radius);box-shadow:0 25px 60px #0006,inset 0 1px #ffffff0f;border:1px solid var(--border);text-align:center;animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}h1{font-weight:800;font-size:42px;letter-spacing:-1px;margin:0;background:linear-gradient(135deg,#fff,#d4d4e8);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}h1 .icon{-webkit-text-fill-color:initial;margin-right:12px}.subtitle{color:var(--text-muted);font-size:15px;margin-top:4px;font-weight:400}button{padding:13px 24px;font-size:15px;font-weight:600;font-family:inherit;color:#fff;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all .25s ease;width:100%;letter-spacing:.3px}.btn-green{background:linear-gradient(135deg,#059669,#10b981);box-shadow:0 4px 20px var(--green-glow)}.btn-green:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--green-glow)}.btn-blue,.primary-btn{background:linear-gradient(135deg,#2563eb,#3b82f6);box-shadow:0 4px 20px var(--blue-glow)}.btn-blue:hover,.primary-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--blue-glow)}.btn-orange,.secondary-btn{background:linear-gradient(135deg,#d97706,#f59e0b);box-shadow:0 4px 20px var(--orange-glow)}.btn-orange:hover,.secondary-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--orange-glow)}.btn-red{background:linear-gradient(135deg,#dc2626,#ef4444);box-shadow:0 4px 20px var(--red-glow)}.btn-red:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--red-glow)}.btn-ghost{background:var(--surface-hover);box-shadow:none;border:1px solid var(--border)}.btn-ghost:hover{background:#ffffff2e;transform:translateY(-1px)}input{padding:13px;font-size:22px;font-family:JetBrains Mono,monospace;text-align:center;border-radius:var(--radius-sm);border:2px solid var(--border);background:#00000040;color:#fff;text-transform:uppercase;letter-spacing:8px;outline:none;transition:border-color .2s}input:focus{border-color:var(--blue)}input::placeholder{color:var(--text-muted);letter-spacing:2px;font-size:14px}input[type=range],.range-input{-webkit-appearance:auto;appearance:auto;padding:0;border:none;background:transparent;letter-spacing:normal;font-size:inherit;text-transform:none;cursor:pointer;width:100%}.range-input.purple{accent-color:#8b5cf6}.mode-toggle{display:flex;width:100%;background:#0000004d;border-radius:8px;overflow:hidden;margin-bottom:16px;border:1px solid var(--border)}.toggle-btn{flex:1;padding:8px;font-size:13px;font-weight:600;background:transparent;color:var(--text-muted);border:none;border-radius:0;cursor:pointer;transition:all .2s;width:auto}.toggle-btn.active{background:#8b5cf640;color:#c4b5fd}.toggle-btn:hover:not(.active){background:#ffffff0d}.slider-label{font-size:13px;color:var(--text-muted);display:flex;justify-content:space-between;margin-bottom:6px}.slider-value{color:#fff;font-weight:700;font-family:JetBrains Mono,monospace}.slider-ticks{display:flex;justify-content:space-between;font-size:11px;color:#6b7280;margin-top:2px}.engine-stats{font-size:10px;color:var(--text-muted);font-family:JetBrains Mono,monospace;opacity:.7;margin-left:6px;white-space:nowrap}.history-item.active .engine-stats{color:#ffffffb3}.analysis-panel{margin-top:12px;background:#0000004d;border-radius:8px;padding:10px;border:1px solid var(--border);max-height:180px;overflow-y:auto}.analysis-panel h4{margin:0 0 8px;font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);display:flex;align-items:center;gap:6px}.analysis-summary{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;padding:8px 10px;border-radius:6px;background:#4ade8014;border:1px solid rgba(74,222,128,.16);font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px}.analysis-summary strong{color:var(--green);font-size:13px;letter-spacing:0}.analysis-line{display:flex;align-items:center;gap:8px;padding:5px 6px;border-radius:4px;font-size:11px;font-family:JetBrains Mono,monospace;transition:background .15s}.analysis-line:hover{background:#ffffff0d}.analysis-rank{min-width:24px;color:#ffffff59}.analysis-score{min-width:42px;text-align:right;font-weight:700;color:var(--green)}.analysis-moves{flex:1;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.analysis-depth{color:#ffffff4d;font-size:10px}.analysis-empty{padding:10px 6px 4px;font-size:11px;color:var(--text-muted)}.analysis-progress-bar{height:4px;background:var(--green);transition:width .2s}@keyframes analysis-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.analysis-loading-view{max-width:640px}.analysis-loading-card{width:100%;padding:28px 24px;border-radius:16px;border:1px solid var(--border);background:radial-gradient(circle at top,rgba(34,197,94,.18),transparent 55%),#0000004d;display:flex;flex-direction:column;align-items:center;gap:14px}.analysis-loading-spinner{width:54px;height:54px;border-radius:50%;border:3px solid rgba(255,255,255,.12);border-top-color:var(--green);animation:analysis-spin 1s linear infinite}.analysis-loading-progress{width:100%;background:#ffffff0f;border-radius:999px;overflow:hidden}.analysis-loading-meta{width:100%;display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--text-muted);font-family:JetBrains Mono,monospace}.analysis-loading-note{margin:0;max-width:420px;text-align:center;font-size:12px;color:var(--text-muted)}@keyframes blink-dot{0%,to{opacity:.3}50%{opacity:1}}.loading-dot{animation:blink-dot 1s ease-in-out infinite;color:var(--green)}.join-form{display:flex;flex-direction:column;gap:12px;width:100%}.error{color:var(--red);background:var(--red-glow);padding:12px;border-radius:var(--radius-sm);width:100%;margin-top:15px;font-weight:500;font-size:14px}.lobby-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;width:100%}.card{background:var(--surface-card);border-radius:var(--radius);padding:28px 24px;display:flex;flex-direction:column;align-items:center;border:1px solid var(--border);box-shadow:0 8px 24px #00000026;transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px #00000040;border-color:#ffffff26}.card-icon{font-size:36px;margin-bottom:12px;display:block}.card h2{margin:0 0 6px;font-size:20px;font-weight:700}.card p{color:var(--text-muted);margin:0 0 20px;font-size:13px;line-height:1.5}.list-card{min-height:280px}.item-list{width:100%;flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px;background:#0003;border-radius:var(--radius-sm);padding:10px}.list-item{background:#ffffff0a;padding:11px 14px;border-radius:8px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;transition:background .2s,transform .15s;font-weight:600;font-size:14px}.list-item:hover{background:#ffffff1f;transform:translate(4px)}.past-game-item{align-items:flex-start}.past-game-main{display:flex;flex-direction:column;gap:3px;min-width:0}.past-game-title{font-size:14px;color:var(--text)}.past-game-players,.past-game-outcome{font-size:11px;color:var(--text-muted);font-weight:500}.past-games-list{max-height:560px}.badge{background:var(--blue);color:#fff;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600}.empty-msg{margin:auto;color:var(--text-muted);font-size:13px}.item-list::-webkit-scrollbar{width:5px}.item-list::-webkit-scrollbar-track{background:transparent}.item-list::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:4px}.room-code-display{font-family:JetBrains Mono,monospace;font-size:72px;font-weight:700;letter-spacing:14px;background:linear-gradient(135deg,var(--orange),#fbbf24);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin:20px 0;filter:drop-shadow(0 4px 12px var(--orange-glow))}@keyframes pulse{0%,to{opacity:.4;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}.loading-pulse{animation:pulse 2s ease-in-out infinite;font-size:18px;color:var(--text-muted);margin-top:10px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.search-icon{font-size:48px;margin:20px 0;display:inline-block;animation:spin 3s linear infinite}.game-layout{display:flex;flex-direction:row;align-items:flex-start;gap:24px;padding:35px;max-width:900px}.game-wrapper{display:flex;flex-direction:column;align-items:center}.game-header{display:flex;justify-content:space-between;width:100%;align-items:center;margin-bottom:14px}.room-badge{background:#ffffff1a;padding:6px 16px;border-radius:20px;font-weight:600;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;border:1px solid var(--border)}.status-bar{font-size:15px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--green)}.status-bar.opponent-turn{color:var(--orange)}.status-bar.analyzing{color:var(--purple)}.controls{margin-top:14px;text-align:center}.controls p{margin:0 0 12px;font-size:14px;color:var(--text-muted)}.controls b{color:var(--text)}.control-actions{display:flex;flex-wrap:wrap;gap:10px}.control-actions button{width:auto;min-width:140px}.precision-grid{width:100%;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:12px}.precision-card{display:flex;flex-direction:column;gap:4px;padding:12px;border-radius:10px;background:#ffffff0d;border:1px solid var(--border)}.precision-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px}.precision-card strong{font-size:22px;color:var(--text)}.precision-meta{font-size:11px;color:var(--text-muted)}.evaluation-chart-card{margin-bottom:12px;padding:12px;border-radius:12px;background:linear-gradient(180deg,#38bdf814,#0f172a29),#00000040;border:1px solid var(--border)}.evaluation-chart-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:8px}.evaluation-chart-head h4{margin:0;font-size:11px;letter-spacing:1.4px;text-transform:uppercase;color:var(--text-muted)}.evaluation-subtitle{display:block;margin-top:4px;font-size:11px;color:var(--text-muted)}.evaluation-pill{padding:5px 10px;border-radius:999px;background:#38bdf824;color:#bae6fd;font-size:11px;font-weight:700;white-space:nowrap}.evaluation-chart-scale{display:flex;justify-content:space-between;margin-bottom:6px;font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted)}.evaluation-chart{height:140px}.evaluation-tooltip{display:flex;flex-direction:column;gap:4px;padding:10px 12px;border-radius:10px;background:#0f172af5;border:1px solid rgba(148,163,184,.25);font-size:11px;color:#e2e8f0;box-shadow:0 16px 32px #02061759}.evaluation-tooltip strong{color:#f8fafc}.board-wrapper{position:relative}.board{display:grid;grid-template-columns:repeat(8,var(--sq));grid-template-rows:repeat(8,var(--sq));border-radius:6px;overflow:hidden;box-shadow:0 12px 40px #00000080,0 0 0 3px #ffffff0f}.square{width:var(--sq);height:var(--sq);display:flex;justify-content:center;align-items:center;position:relative;cursor:pointer;transition:background-color .15s}.square.light{background-color:var(--board-light)}.square.dark{background-color:var(--board-dark)}.square.light.selected{background-color:var(--board-light-selected)}.square.dark.selected{background-color:var(--board-dark-selected)}.coord-label{position:absolute;font-size:10px;font-weight:700;font-family:Inter,sans-serif;pointer-events:none;-webkit-user-select:none;user-select:none;opacity:.65}.coord-label.file{bottom:2px;right:4px}.coord-label.rank{top:2px;left:4px}.square.light .coord-label{color:var(--board-dark)}.square.dark .coord-label{color:var(--board-light)}.legal-move-hint{width:18px;height:18px;background-color:#0000002e;border-radius:50%;pointer-events:none;z-index:1}.square.legal-capture .legal-move-hint{position:absolute;top:0;left:0;width:100%;height:100%;background:none;border:4px solid rgba(0,0,0,.2);border-radius:0;box-sizing:border-box}.square.pre-move-start:after,.square.pre-move-end:after{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:#dc262666;pointer-events:none}.piece{width:100%;height:100%;object-fit:contain;cursor:grab;position:relative;z-index:2;-webkit-user-select:none;user-select:none;-webkit-user-drag:none;filter:drop-shadow(0 2px 3px rgba(0,0,0,.35));transition:transform .12s ease}.piece[draggable=true]{-webkit-user-drag:element}.piece:active{cursor:grabbing}.square.dragging .piece{opacity:.4}.history-panel{width:220px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;height:calc(8 * var(--sq) + 2px);display:flex;flex-direction:column;box-shadow:0 8px 24px #0003}.history-panel h3{margin:0 0 12px;text-transform:uppercase;font-size:12px;font-weight:700;letter-spacing:2px;text-align:center;color:var(--text-muted);border-bottom:1px solid var(--border);padding-bottom:12px}.history-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:4px}.history-item{padding:7px 10px;background:#ffffff0a;border-radius:6px;cursor:pointer;transition:all .15s;font-family:JetBrains Mono,monospace;font-size:13px;color:var(--text-muted);display:flex;justify-content:space-between;align-items:center}.history-item:hover{background:#ffffff1f;color:var(--text)}.history-item.active{background:var(--blue);color:#fff;font-weight:600}.history-list::-webkit-scrollbar{width:5px}.history-list::-webkit-scrollbar-track{background:transparent}.history-list::-webkit-scrollbar-thumb{background:#ffffff26;border-radius:4px}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.card{animation:slideUp .4s ease backwards}.card:nth-child(1){animation-delay:0s}.card:nth-child(2){animation-delay:.08s}.card:nth-child(3){animation-delay:.16s}.card:nth-child(4){animation-delay:.24s}@media(max-width:720px){.lobby-grid{grid-template-columns:1fr}.game-layout{flex-direction:column;align-items:center}.history-panel{width:100%;height:200px}:root{--sq: 50px}}.identity-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#0a0a14e6;backdrop-filter:blur(25px);-webkit-backdrop-filter:blur(25px);z-index:10000;display:flex;justify-content:center;align-items:center;animation:fadeIn .4s ease-out}.identity-modal{width:90%;max-width:450px;background:#1a1a2ed9;border:1px solid rgba(0,242,255,.2);border-radius:24px;padding:45px;text-align:center;box-shadow:0 0 60px #0009,0 0 30px #00f2ff14,inset 0 0 20px #ffffff05;position:relative;overflow:hidden}.identity-modal:before{content:"";position:absolute;top:0;left:0;width:100%;height:2px;background:linear-gradient(90deg,transparent,#00f2ff,transparent);animation:scanning 4s linear infinite}@keyframes scanning{0%{transform:translate(-100%)}to{transform:translate(100%)}}.identity-modal h2{font-size:30px;margin-bottom:12px;text-transform:uppercase;letter-spacing:3px;color:#00f2ff;text-shadow:0 0 15px rgba(0,242,255,.5);font-weight:800}.identity-modal p{color:#94a3b8;font-size:14px;margin-bottom:35px;line-height:1.6}.identity-form{display:flex;flex-direction:column;gap:25px}.input-block{text-align:left}.input-block label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:2px;color:#64748b;margin-bottom:10px;margin-left:4px;font-weight:700}.cyber-input{width:100%;background:#00000080!important;border:1px solid rgba(255,255,255,.1)!important;padding:16px 20px!important;font-size:16px!important;font-family:JetBrains Mono,monospace!important;text-align:left!important;letter-spacing:1px!important;text-transform:none!important;border-radius:14px!important;transition:all .3s ease!important;color:#fff!important;outline:none!important}.cyber-input:focus{border-color:#00f2ff!important;box-shadow:0 0 20px #00f2ff40;background:#000000b3!important}.btn-cyber{margin-top:15px;background:linear-gradient(135deg,#00d2ff,#3a7bd5)!important;color:#fff!important;padding:18px!important;font-size:16px!important;font-weight:800!important;text-transform:uppercase!important;letter-spacing:3px!important;border-radius:14px!important;box-shadow:0 6px 25px #3a7bd573!important;cursor:pointer!important;transition:all .3s cubic-bezier(.175,.885,.32,1.275)!important;border:none!important}.btn-cyber:hover{transform:translateY(-3px);box-shadow:0 10px 35px #3a7bd5a6!important;filter:brightness(1.15)}.btn-cyber:active{transform:translateY(0)}.cyber-status{font-size:10px;color:#ef4444;margin-top:8px;font-family:JetBrains Mono,monospace;text-transform:uppercase;opacity:.8;letter-spacing:1px}