:root{--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-surface:#fff;--bg-panel:#fff;--bg-subtle:#f1f5f9;--bg-hover:#e2e8f0;--border-color:#e2e8f0;--border-hover:#cbd5e1;--primary:#dc2626;--primary-hover:#b91c1c;--primary-light:#fef2f2;--primary-glow:#dc262633;--text-primary:#0f172a;--text-secondary:#475569;--text-dim:#94a3b8;--accent-cyan:#dc2626;--accent-violet:#991b1b;--accent-neon:#16a34a;--board-light:#eeeed2;--board-dark:#769656;--board-frame:#cbd5e1;--square-last-move:#f59e0b59;--square-check:#ef444473;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -2px #0000000a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000000d;--font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-header:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}[data-board-theme=emerald],:root:not([data-board-theme]){--board-light:#eeeed2;--board-dark:#769656}[data-board-theme=wood]{--board-light:#f0d9b5;--board-dark:#b58863}[data-board-theme=slate]{--board-light:#dee3e6;--board-dark:#8ca2ad}[data-board-theme=midnight]{--board-light:#eae9d2;--board-dark:#4b7399}[data-board-theme=ruby]{--board-light:#f5e6e8;--board-dark:#a8434d}[data-board-theme=cyberpunk]{--board-light:#78909c;--board-dark:#263238}[data-board-theme=amber]{--board-light:#f7e1d7;--board-dark:#c08552}[data-board-theme=pixel]{--board-light:#cadc9f;--board-dark:#6b8c42}html{scrollbar-gutter:stable}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:var(--font-family);-webkit-font-smoothing:antialiased;margin:0;padding:0;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-header);letter-spacing:-.02em;color:var(--text-primary);font-weight:600}#root{box-sizing:border-box;flex-direction:column;min-height:100vh;display:flex}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-dim)}.chess-container{box-sizing:border-box;grid-template-columns:1fr 340px;align-items:center;gap:8px;width:100%;max-width:100vw;height:100dvh;max-height:100dvh;margin:0;padding:0 6px;display:grid;overflow:hidden}.chess-container.zen-mode{grid-template-columns:1fr;max-width:100vw;padding:0}:-webkit-any(:fullscreen .chess-container,:-webkit-full-screen .chess-container,.chess-container.fullscreen-active){gap:6px;width:100vw;max-width:100vw;height:100vh;max-height:100vh;padding:0 4px}:is(:fullscreen .chess-container,:fullscreen .chess-container,.chess-container.fullscreen-active){gap:6px;width:100vw;max-width:100vw;height:100vh;max-height:100vh;padding:0 4px}@media (width<=960px){.chess-container{grid-template-columns:1fr;align-items:center;height:auto;min-height:100dvh;padding:0;overflow-y:auto}.board-container-scaler{--board-size:min(100vw, 100dvh, 750px)}}.board-wrapper{flex-direction:row;justify-content:center;align-items:center;gap:6px;width:100%;height:100%;max-height:100dvh;margin:0;padding:0;display:flex;overflow:hidden}.board-container-scaler{--board-size:min(100dvh, calc(100vw - 354px), 1600px);width:var(--board-size);height:var(--board-size);aspect-ratio:1;flex-shrink:0;max-width:100%;max-height:100%;position:relative}.zen-mode .board-container-scaler{--board-size:min(100dvh, 100vw, 1920px)}:-webkit-any(:fullscreen .board-container-scaler,:-webkit-full-screen .board-container-scaler,.fullscreen-active .board-container-scaler){--board-size:min(100vh, calc(100vw - 348px), 1800px)}:is(:fullscreen .board-container-scaler,:fullscreen .board-container-scaler,.fullscreen-active .board-container-scaler){--board-size:min(100vh, calc(100vw - 348px), 1800px)}.fullscreen-active.zen-mode .board-container-scaler{--board-size:min(100vh, 100vw, 2160px)}:fullscreen .chess-container.zen-mode .board-container-scaler{--board-size:min(100vh, 100vw, 2160px)}:-webkit-full-screen .chess-container.zen-mode .board-container-scaler{--board-size:min(100vh, 100vw, 2160px)}.zen-floating-clock{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);color:#fff;z-index:50;background:#0f172ae0;border:1px solid #ffffff26;border-radius:8px;align-items:center;gap:12px;padding:6px 12px;font-size:13px;font-weight:600;display:flex;position:absolute;top:8px;right:8px;box-shadow:0 4px 12px #00000040}.board-grid{width:100%;height:100%;box-shadow:var(--shadow-md);box-sizing:border-box;border:none;border-radius:0;grid-template-rows:repeat(8,1fr);grid-template-columns:repeat(8,1fr);display:grid;overflow:hidden}.square{cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:center;align-items:center;display:flex;position:relative}.square.light{background-color:var(--board-light)}.square.dark{background-color:var(--board-dark)}.square.last-move{background-color:var(--square-last-move)!important}.square.checked{background-color:var(--square-check)!important}.square.selected-piece{box-shadow:inset 0 0 10px #2563eb99;background-color:#2563eb66!important}.square.selected-destination:after{content:"";pointer-events:none;z-index:7;background-color:#10b981d9;border-radius:50%;width:26%;height:26%;position:absolute;box-shadow:0 0 10px #10b981b3}.square.selected-destination.has-piece:after{background-color:#0000;border:3.5px solid #10b981e6;border-radius:50%;width:82%;height:82%;box-shadow:inset 0 0 8px #10b98180}.square.my-hover-destination:after{content:"";pointer-events:none;z-index:7;background-color:#06b6d4d9;border-radius:50%;width:26%;height:26%;position:absolute;box-shadow:0 0 10px #06b6d4b3}.square.my-hover-destination.has-piece:after{background-color:#0000;border:3.5px solid #06b6d4e6;border-radius:50%;width:82%;height:82%;box-shadow:inset 0 0 8px #06b6d480}.square.opponent-hover-destination:after{content:"";pointer-events:none;z-index:7;background-color:#a855f7d9;border-radius:50%;width:26%;height:26%;position:absolute;box-shadow:0 0 10px #a855f7b3}.square.opponent-hover-destination.has-piece:after{background-color:#0000;border:3.5px solid #ef4444e6;border-radius:50%;width:82%;height:82%;box-shadow:inset 0 0 8px #ef444480}.chess-piece{object-fit:contain;z-index:10;width:85%;height:85%;transition:transform .1s,filter .2s}.chess-piece.pawn{width:60%;height:60%}.chess-piece:hover{transform:scale(1.05)}[data-board-theme=emerald] .chess-piece{filter:drop-shadow(0 1.5px 3px #00000047)}[data-board-theme=wood] .chess-piece{filter:drop-shadow(0 2px 4px #4a280f73)}[data-board-theme=slate] .chess-piece{filter:drop-shadow(0 2px 3.5px #1e293b59)}[data-board-theme=midnight] .chess-piece{filter:drop-shadow(0 2px 6px #0009)}[data-board-theme=ruby] .chess-piece{filter:drop-shadow(0 2px 5px #a8434d66)}[data-board-theme=cyberpunk] .chess-piece{filter:drop-shadow(0 0 4px #00e5ff40)drop-shadow(0 2px 5px #000000b3)}[data-board-theme=amber] .chess-piece{filter:drop-shadow(0 2px 4px #c0855266)}[data-board-theme=pixel] .chess-piece{image-rendering:pixelated;image-rendering:crisp-edges;filter:drop-shadow(0 2px #00000073)}.board-grid.inactive{opacity:.95;cursor:not-allowed}.board-grid.inactive .square{cursor:not-allowed}.board-grid.inactive .chess-piece{cursor:not-allowed;pointer-events:none}.board-grid.inactive .chess-piece:hover{transform:none}@keyframes check-pulse{0%{background-color:#ef444466;box-shadow:inset 0 0 10px 2px #ef444499}50%{background-color:#ef444499;box-shadow:inset 0 0 18px 6px #ef4444d9}to{background-color:#ef444466;box-shadow:inset 0 0 10px 2px #ef444499}}.square.checked{z-index:9;animation:1.6s ease-in-out infinite check-pulse}@keyframes board-shake{0%{transform:translate(0)}10%{transform:translate(-2px,-1px)}20%{transform:translate(-3px)}30%{transform:translateY(2px)}40%{transform:translate(2px,-1px)}50%{transform:translate(-1px,2px)}60%{transform:translate(3px,1px)}70%{transform:translate(-2px,-1px)}80%{transform:translate(-1px,-2px)}90%{transform:translate(2px,2px)}to{transform:translate(0)}}.shake{animation:.4s ease-in-out board-shake}.game-sidebar{flex-direction:column;gap:6px;height:100%;max-height:calc(100dvh - 8px);display:flex;overflow:hidden}.game-sidebar .player-card{width:100%;max-width:100%}.moves-history-panel{flex-direction:column;flex:1;min-height:0;display:flex;overflow:hidden}.move-row-zebra{border-radius:4px;grid-template-columns:36px 1fr 1fr;align-items:center;padding:2px 4px;display:grid}.move-row-zebra:nth-child(2n){background-color:#00000006}[data-theme=dark] .move-row-zebra:nth-child(2n){background-color:#ffffff08}.playback-toolbar{border-top:1px solid var(--border-color);justify-content:center;align-items:center;gap:6px;padding-top:6px;display:flex}.playback-btn{background:var(--bg-subtle);border:1px solid var(--border-color);color:var(--text-primary);cursor:pointer;border-radius:6px;justify-content:center;align-items:center;padding:4px 10px;font-size:13px;transition:background-color .15s,transform .1s;display:flex}.playback-btn:hover:not(:disabled){background:var(--primary-light);color:var(--primary);border-color:var(--primary)}.playback-btn:disabled{opacity:.35;cursor:not-allowed}.material-badge{color:#16a34a;background:#16a34a1f;border-radius:4px;align-items:center;padding:1px 5px;font-size:11px;font-weight:700;line-height:1;display:inline-flex}.captured-pieces-list{letter-spacing:-2px;align-items:center;gap:2px;font-size:14px;display:inline-flex}.move-action-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;padding:4px;transition:color .15s,background-color .15s;display:inline-flex}.move-action-btn:hover{color:var(--primary);background-color:var(--bg-subtle)}.player-card{width:100%;max-width:var(--board-size,min(800px, 76vh, 80vw));background-color:var(--bg-secondary);border:1px solid var(--border-color);box-sizing:border-box;border-radius:6px;flex-shrink:0;justify-content:space-between;align-items:center;height:34px;padding:4px 12px;transition:all .15s;display:flex}.player-card.active-turn{border-color:var(--primary);background-color:var(--primary-light);box-shadow:0 0 0 1px var(--primary)}@keyframes pulse-blue{0%{transform:scale(.95);box-shadow:0 0 #2563ebb3}70%{transform:scale(1);box-shadow:0 0 0 6px #2563eb00}to{transform:scale(.95);box-shadow:0 0 #2563eb00}}.turn-pulse-indicator{background-color:var(--primary);border-radius:50%;width:8px;height:8px;animation:2s ease-in-out infinite pulse-blue;display:inline-block}.match-menu-container{display:inline-flex;position:relative}.match-menu-trigger{background:var(--bg-surface);border:1px solid var(--border-color);width:32px;height:32px;color:var(--text-secondary);cursor:pointer;border-radius:8px;justify-content:center;align-items:center;transition:all .15s;display:flex}.match-menu-trigger:hover,.match-menu-trigger.active{background:var(--bg-subtle);color:var(--text-primary);border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.match-menu-dropdown{background:var(--bg-surface);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-color);z-index:1000;transform-origin:100% 0;border-radius:12px;flex-direction:column;gap:2px;width:264px;padding:6px;animation:.15s cubic-bezier(.16,1,.3,1) matchMenuSlideDown;display:flex;position:absolute;top:calc(100% + 6px);right:0;box-shadow:0 16px 36px -4px #0000004d,0 0 0 1px #ffffff0d}@keyframes matchMenuSlideDown{0%{opacity:0;transform:scale(.96)translateY(-6px)}to{opacity:1;transform:scale(1)translateY(0)}}.match-menu-header{background:var(--bg-subtle);color:var(--text-primary);border-radius:8px;align-items:center;gap:8px;margin-bottom:2px;padding:8px 10px;font-size:12.5px;font-weight:600;display:flex}.match-menu-header-icon{background:var(--primary-light);width:22px;height:22px;color:var(--primary);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.match-menu-item{width:100%;color:var(--text-primary);cursor:pointer;-webkit-user-select:none;user-select:none;box-sizing:border-box;background:0 0;border:none;border-radius:8px;justify-content:space-between;align-items:center;padding:7px 10px;font-size:13px;font-weight:500;transition:all .12s;display:flex}.match-menu-item:hover{background:var(--bg-subtle)}.match-menu-item-left{color:var(--text-primary);align-items:center;gap:9px;display:flex}.match-menu-item-icon{color:var(--text-secondary);align-items:center;display:flex}.match-menu-item:hover .match-menu-item-icon{color:var(--primary)}.match-menu-item-right{align-items:center;gap:6px;display:flex}.match-menu-key-pill{background:var(--bg-subtle);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:4px;padding:1px 5px;font-family:inherit;font-size:10px;font-weight:600;line-height:1.2}.match-menu-switch{background:var(--border-color);border-radius:10px;flex-shrink:0;width:32px;height:18px;transition:background-color .2s cubic-bezier(.4,0,.2,1);display:inline-block;position:relative}.match-menu-switch.active{background:var(--primary)}.match-menu-switch-thumb{background:#fff;border-radius:50%;width:14px;height:14px;transition:transform .2s cubic-bezier(.4,0,.2,1);position:absolute;top:2px;left:2px;box-shadow:0 1px 3px #0003}.match-menu-switch.active .match-menu-switch-thumb{transform:translate(14px)}.match-menu-divider{background:var(--border-color);height:1px;margin:4px 0}.match-theme-preview-strip{gap:3px;display:flex}.match-theme-swatch{border-radius:50%;width:8px;height:8px}.match-theme-grid{background:var(--bg-subtle);border-radius:8px;grid-template-columns:repeat(2,1fr);gap:6px;max-height:230px;margin:4px 0;padding:8px;display:grid;overflow-y:auto}.match-theme-card{border:1px solid var(--border-color);background:var(--bg-surface);cursor:pointer;color:var(--text-primary);border-radius:6px;align-items:center;gap:7px;padding:6px 8px;font-size:12px;font-weight:500;transition:all .12s;display:flex}.match-theme-card:hover{border-color:var(--primary)}.match-theme-card.active{border-color:var(--primary);background:var(--primary-light);color:var(--primary);font-weight:600}.match-theme-duo-badge{border:1px solid #00000026;border-radius:4px;flex-shrink:0;width:16px;height:16px;display:flex;overflow:hidden}.match-theme-duo-badge .half{width:50%;height:100%}.match-resign-card{background:#ef444414;border:1px solid #ef444440;border-radius:8px;margin:4px 0;padding:10px}.match-resign-prompt{color:#ef4444;align-items:center;gap:6px;margin-bottom:8px;font-size:12px;font-weight:600;display:flex}.match-resign-actions{gap:6px;display:flex}.match-resign-confirm-btn{color:#fff;cursor:pointer;background:#ef4444;border:none;border-radius:6px;flex:1;padding:6px 10px;font-size:11.5px;font-weight:600;transition:background .12s}.match-resign-confirm-btn:hover{background:#dc2626}.match-resign-cancel-btn{background:var(--bg-surface);border:1px solid var(--border-color);color:var(--text-primary);cursor:pointer;border-radius:6px;padding:6px 10px;font-size:11.5px;font-weight:500;transition:background .12s}.match-resign-cancel-btn:hover{background:var(--bg-subtle)}.match-menu-danger-item{color:#ef4444!important}.match-menu-danger-item:hover{background:#ef44441a!important}.match-menu-danger-item .match-menu-item-icon{color:#ef4444!important}.glass-panel{background:var(--bg-secondary);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);border-radius:12px}.navbar{border-bottom:1px solid var(--border-color);background:var(--bg-secondary);z-index:100;box-shadow:var(--shadow-sm);justify-content:space-between;align-items:center;padding:12px 24px;display:flex;position:sticky;top:0}.navbar-brand{color:var(--text-primary);align-items:center;gap:8px;font-size:20px;font-weight:700;text-decoration:none;display:flex}.navbar-links{gap:8px;display:flex}.nav-link{color:var(--text-secondary);border-radius:6px;padding:6px 14px;font-size:14px;font-weight:600;text-decoration:none;transition:background-color .15s,color .15s}.nav-link:hover{color:var(--text-primary);background:var(--bg-subtle)}.nav-link.active{color:var(--primary);background:var(--primary-light)}.nav-user{align-items:center;gap:12px;display:flex}.btn-primary{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:8px 16px;font-size:14px;font-weight:600;transition:background-color .15s}.btn-primary:hover{background:var(--primary-hover)}.btn-primary:disabled{color:#fff;cursor:not-allowed;background:#94a3b8}.btn-secondary{color:var(--text-primary);border:1px solid var(--border-color);cursor:pointer;background:#fff;border-radius:8px;padding:8px 16px;font-size:14px;font-weight:500;transition:all .15s}.btn-secondary:hover{background:var(--bg-subtle);border-color:var(--border-hover)}.btn-secondary:disabled{opacity:.5;cursor:not-allowed}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.animate-spin{animation:1s linear infinite spin}.modal-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:1000;background:#0f172a59;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-secondary);flex-direction:column;gap:16px;width:90%;max-width:420px;padding:24px;display:flex}