@import"https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap";:root{--bg: #f0f4ff;--surface: #ffffff;--surface-hover: #f1f5f9;--surface-glass: rgba(255, 255, 255, .75);--text: #0f172a;--text-muted: #64748b;--border: #e2e8f0;--border-subtle: rgba(0, 0, 0, .06);--primary: #6366f1;--primary-hover: #4f46e5;--primary-text: #ffffff;--primary-glow: rgba(99, 102, 241, .25);--x-color: #e11d48;--x-glow: rgba(225, 29, 72, .2);--o-color: #2563eb;--o-glow: rgba(37, 99, 235, .2);--win-bg: #fef9c3;--win-border: #f59e0b;--win-glow: rgba(245, 158, 11, .25);--shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);--shadow-md: 0 4px 16px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.05);--shadow-lg: 0 8px 32px rgba(0,0,0,.1), 0 4px 12px rgba(0,0,0,.06);--radius: 14px;--radius-sm: 8px;--radius-xs: 6px;--transition: .22s cubic-bezier(.4, 0, .2, 1);--blob1: rgba(99, 102, 241, .12);--blob2: rgba(168, 85, 247, .09);--blob3: rgba( 14, 165, 233, .08)}[data-theme=dark]{--bg: #080b18;--surface: #111827;--surface-hover: #1a2436;--surface-glass: rgba(255, 255, 255, .04);--text: #e2e8f0;--text-muted: #64748b;--border: rgba(255, 255, 255, .09);--border-subtle: rgba(255, 255, 255, .05);--primary: #818cf8;--primary-hover: #6366f1;--primary-text: #ffffff;--primary-glow: rgba(129, 140, 248, .3);--x-color: #f472b6;--x-glow: rgba(244, 114, 182, .3);--o-color: #38bdf8;--o-glow: rgba(56, 189, 248, .3);--win-bg: rgba(251, 191, 36, .1);--win-border: #fbbf24;--win-glow: rgba(251, 191, 36, .4);--shadow-sm: 0 1px 3px rgba(0,0,0,.4);--shadow-md: 0 4px 16px rgba(0,0,0,.5);--shadow-lg: 0 8px 32px rgba(0,0,0,.6);--blob1: rgba(99, 102, 241, .22);--blob2: rgba(168, 85, 247, .18);--blob3: rgba( 14, 165, 233, .14)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Space Grotesk,-apple-system,BlinkMacSystemFont,Segoe 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var(--transition)}.header-brand{display:flex;align-items:center;gap:.5rem;flex:1;min-width:0}.header-logo{font-size:1.2rem;font-weight:700;letter-spacing:3px;background:linear-gradient(135deg,var(--x-color),var(--o-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;flex-shrink:0}.header-title{font-weight:700;font-size:1.1rem;letter-spacing:-.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.header-nav{display:flex;gap:2px;background:var(--surface-hover);padding:3px;border-radius:var(--radius-sm);border:1px solid var(--border);flex-shrink:0}.nav-btn{padding:.35rem .875rem;border:none;border-radius:var(--radius-xs);background:transparent;color:var(--text-muted);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition);white-space:nowrap}.nav-btn:hover{color:var(--text);background:var(--surface)}.nav-btn.active{background:var(--surface);color:var(--primary);box-shadow:var(--shadow-sm)}[data-theme=dark] 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768px){.game-main{margin:0;max-width:none}}.controls-row{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;justify-content:center;width:100%}.seg-control{display:flex;gap:2px;background:var(--surface);padding:3px;border-radius:var(--radius-sm);border:1px solid var(--border);box-shadow:var(--shadow-sm)}.seg-btn{padding:.35rem .75rem;border:none;border-radius:var(--radius-xs);background:transparent;color:var(--text-muted);font-size:.8125rem;font-weight:500;cursor:pointer;transition:all var(--transition);white-space:nowrap}.seg-btn:hover{color:var(--text)}.seg-btn.active{background:var(--primary);color:#fff;box-shadow:0 2px 8px var(--primary-glow)}.icon-btn{width:34px;height:34px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:all 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solid var(--border);background:var(--surface);font-weight:600;font-size:.9375rem;text-align:center;width:100%;transition:all var(--transition);box-shadow:var(--shadow-sm);letter-spacing:-.01em}.status-x{color:var(--x-color);border-color:var(--x-color);box-shadow:0 0 0 1px var(--x-color),0 4px 16px var(--x-glow)}.status-o{color:var(--o-color);border-color:var(--o-color);box-shadow:0 0 0 1px var(--o-color),0 4px 16px var(--o-glow)}.status-draw{color:var(--text-muted)}.status-win{background:#dcfce7;color:#166534;border-color:#86efac;box-shadow:0 0 0 1px #86efac,0 4px 16px #86efac4d}[data-theme=dark] .status-win{background:#34d3991a;color:#34d399;border-color:#34d39966;box-shadow:0 0 0 1px #34d39966,0 4px 20px #34d39933}.status-thinking{color:var(--text-muted);border-style:dashed;animation:thinking 1.6s ease-in-out infinite}@keyframes thinking{0%,to{opacity:1}50%{opacity:.45}}.board{display:grid;grid-template-columns:repeat(var(--board-size),1fr);gap:8px;padding:1rem;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);width:100%;aspect-ratio:1 / 1;transition:background var(--transition),border-color var(--transition),opacity var(--transition)}[data-theme=dark] .board{background:var(--surface-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-color:var(--border)}.board-thinking{opacity:.65;pointer-events:none}.cell{aspect-ratio:1 / 1;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);font-size:clamp(1.2rem,5vw,2.25rem);font-weight:800;cursor:pointer;transition:all var(--transition);display:flex;align-items:center;justify-content:center;line-height:1;color:var(--text);position:relative;overflow:hidden}.cell-x-mark,.cell-o-mark{display:block;line-height:1;animation:cellAppear .2s 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2rem;background:var(--primary);color:var(--primary-text);border:none;border-radius:var(--radius-sm);font-size:.9375rem;font-weight:600;cursor:pointer;transition:all var(--transition);box-shadow:0 4px 14px var(--primary-glow);letter-spacing:-.01em}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 6px 20px var(--primary-glow)}.btn-primary:active{transform:translateY(0)}.btn-danger{padding:.625rem 1.5rem;background:transparent;color:#ef4444;border:1.5px solid #ef4444;border-radius:var(--radius-sm);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition)}.btn-danger:hover{background:#ef4444;color:#fff;box-shadow:0 4px 14px #ef44444d}.game-sidebar{display:flex;flex-direction:column;gap:1rem}.stats-compact{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.875rem 1rem;box-shadow:var(--shadow-sm);transition:background var(--transition),border-color var(--transition)}[data-theme=dark] .stats-compact{background:var(--surface-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.stats-compact-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:.75rem}.stats-compact-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:var(--text-muted)}.btn-reset-stats{font-size:.6875rem;font-weight:600;padding:2px 8px;background:transparent;color:var(--text-muted);border:1px solid var(--border);border-radius:4px;cursor:pointer;transition:all var(--transition);text-transform:uppercase;letter-spacing:.05em}.btn-reset-stats:hover{color:#ef4444;border-color:#ef4444}.stats-compact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.375rem}.stat-mini{display:flex;flex-direction:column;align-items:center;gap:2px;padding:.5rem .25rem;background:var(--bg);border-radius:var(--radius-xs);border:1px solid var(--border-subtle)}.stat-mini-val{font-size:1.375rem;font-weight:700;line-height:1;color:var(--text)}.stat-mini-label{font-size:.625rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em}.history-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.875rem 1rem;box-shadow:var(--shadow-sm);transition:background var(--transition),border-color var(--transition)}[data-theme=dark] .history-panel{background:var(--surface-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.history-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:var(--text-muted);margin-bottom:.625rem}.history-empty{font-size:.8125rem;color:var(--text-muted);text-align:center;padding:.5rem 0}.history-list{list-style:none;display:flex;flex-direction:column;gap:2px;max-height:260px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.history-list::-webkit-scrollbar{width:4px}.history-list::-webkit-scrollbar-track{background:transparent}.history-list::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.history-item{display:flex;align-items:center;gap:.5rem;padding:.3rem .5rem;border-radius:var(--radius-xs);font-size:.8125rem;background:var(--surface-hover);transition:background var(--transition);animation:historySlide .2s ease}@keyframes historySlide{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}.history-num{font-size:.625rem;color:var(--text-muted);width:16px;text-align:right;flex-shrink:0}.history-player{font-weight:700;font-size:.875rem;width:16px;flex-shrink:0}.history-pos{color:var(--text-muted);font-size:.75rem;font-weight:500;letter-spacing:.04em}@media (max-width: 767px){.history-list{max-height:180px}}.profile-page{display:flex;flex-direction:column;align-items:center;gap:1.25rem;width:100%;max-width:460px}.profile-header{display:flex;align-items:center;gap:1rem;background:var(--surface);padding:1.25rem 1.5rem;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow-sm);width:100%;transition:background var(--transition),border-color var(--transition)}[data-theme=dark] .profile-header{background:var(--surface-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.profile-avatar{font-size:2.25rem;width:56px;height:56px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary-glow),transparent);border-radius:50%;border:2px solid var(--border);flex-shrink:0}.profile-name{font-size:1.25rem;font-weight:700;letter-spacing:-.02em}.profile-sub{color:var(--text-muted);font-size:.875rem;margin-top:.125rem}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;width:100%}.stat-card{background:var(--surface);border:1px solid var(--border);border-top:3px solid var(--accent, var(--primary));border-radius:var(--radius);padding:1.25rem 1rem;text-align:center;box-shadow:var(--shadow-sm);transition:transform var(--transition),background var(--transition),box-shadow var(--transition)}[data-theme=dark] .stat-card{background:var(--surface-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}.stat-value{font-size:2.25rem;font-weight:700;color:var(--accent, var(--primary));line-height:1;letter-spacing:-.03em}.stat-label{font-size:.6875rem;font-weight:600;color:var(--text-muted);margin-top:.375rem;text-transform:uppercase;letter-spacing:.07em}.streak-section{display:flex;gap:.75rem;width:100%;flex-wrap:wrap}.streak-item{flex:1;min-width:120px;padding:.75rem 1rem;border-radius:var(--radius-sm);font-size:.875rem;font-weight:600;text-align:center;border:1.5px solid transparent}.streak-x{background:#e11d4814;border-color:var(--x-color);color:var(--x-color)}.streak-o{background:#2563eb14;border-color:var(--o-color);color:var(--o-color)}[data-theme=dark] .streak-x{background:#f472b61a}[data-theme=dark] .streak-o{background:#38bdf81a}.winrate-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.125rem 1.5rem;width:100%;box-shadow:var(--shadow-sm);transition:background var(--transition),border-color var(--transition)}[data-theme=dark] .winrate-section{background:var(--surface-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.winrate-label{font-size:.8125rem;color:var(--text-muted);margin-bottom:.625rem}.winrate-bar{height:8px;background:var(--border);border-radius:4px;overflow:hidden}.winrate-fill{height:100%;background:linear-gradient(90deg,var(--x-color),var(--o-color));border-radius:4px;transition:width .6s cubic-bezier(.4,0,.2,1)}.winrate-value{font-size:1.125rem;font-weight:700;color:var(--primary);margin-top:.375rem;text-align:right}.empty-state{color:var(--text-muted);font-size:.9375rem;text-align:center;padding:1rem}@media (max-width: 480px){.header{padding:0 .875rem;gap:.5rem}.header-title{display:none}.main{padding:1rem .625rem 2rem}.board{gap:5px;padding:.625rem}.controls-row{gap:.375rem}.seg-btn{padding:.3rem .55rem;font-size:.75rem}.size-btn{padding:.3rem .7rem}.stats-compact-grid{gap:.25rem}.stat-mini-val{font-size:1.125rem}}@media (max-width: 360px){.player-card{padding:.5rem;gap:.35rem}.player-name{display:none}}