.menu-page{display:flex;flex-direction:column;align-items:center;padding:32px 16px 24px;gap:28px;min-height:100dvh}.menu-header{display:flex;flex-direction:column;align-items:center;gap:8px}.menu-logo{display:flex;gap:4px;margin-bottom:4px}.logo-x{font-size:36px;font-weight:900;color:var(--color-x);text-shadow:0 0 20px rgba(239,68,68,.3)}.logo-o{font-size:36px;font-weight:900;color:var(--color-o);text-shadow:0 0 20px rgba(6,182,212,.3)}.menu-title{font-size:28px;font-weight:800;letter-spacing:-.5px;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.menu-subtitle{font-size:15px;color:var(--text-secondary)}.mode-list{display:flex;flex-direction:column;gap:14px;width:100%;max-width:400px}.mode-card{padding:18px;position:relative;overflow:hidden;transition:transform .2s var(--ease-smooth),box-shadow .2s}.mode-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.mode-gradient-classic:before,.mode-gradient-match:before,.mode-gradient-gomoku:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius-lg) var(--radius-lg) 0 0}.mode-gradient-classic:before{background:linear-gradient(90deg,var(--color-x),var(--color-o))}.mode-gradient-match:before{background:linear-gradient(90deg,#f59e0b,#ef4444)}.mode-gradient-gomoku:before{background:linear-gradient(90deg,#8b5cf6,#06b6d4)}.mode-card-header{display:flex;align-items:center;gap:14px;margin-bottom:14px}.mode-icon{width:48px;height:48px;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;border-radius:var(--radius-sm);background:var(--color-accent-light);color:var(--color-accent);flex-shrink:0;letter-spacing:-1px}.mode-info{display:flex;flex-direction:column;gap:2px;min-width:0}.mode-name{font-size:17px;font-weight:700;color:var(--text-primary);margin:0}.mode-desc{font-size:13px;color:var(--text-secondary);margin:0}.mode-actions{display:flex;gap:8px}.mode-btn{flex:1;padding:10px 16px;font-size:14px;min-height:42px}.menu-nav{display:flex;gap:12px;margin-top:auto;padding-top:8px}.nav-item{display:flex;align-items:center;gap:8px;padding:10px 20px;border:1px solid var(--border-color);border-radius:var(--radius-full);background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);color:var(--text-primary);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;font-family:var(--font-family)}.nav-item:hover{border-color:var(--color-accent);background:var(--color-accent-light)}.nav-icon{font-size:16px}.nav-label{font-size:14px}.setup-page{display:flex;flex-direction:column;align-items:center;padding:16px 16px 32px;gap:24px;min-height:100dvh}.setup-header{display:flex;align-items:center;gap:12px;width:100%;max-width:400px}.setup-back{width:40px;height:40px;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-primary);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;font-family:var(--font-family)}.setup-back:hover{border-color:var(--color-accent)}.setup-title{font-size:22px;font-weight:700;color:var(--text-primary)}.setup-section{width:100%;max-width:400px;padding:20px}.section-label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:14px}.setup-options{display:flex;gap:10px}.option-pill{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:16px 12px;border:2px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-primary);cursor:pointer;transition:all .2s var(--ease-smooth);font-family:var(--font-family)}.option-pill:hover{border-color:var(--color-accent)}.option-pill.active{border-color:var(--color-accent);background:var(--color-accent-light);box-shadow:0 0 0 3px var(--color-accent-glow)}.pill-number{font-size:28px;font-weight:800;color:var(--text-primary)}.option-pill.active .pill-number{color:var(--color-accent)}.pill-label{font-size:13px;font-weight:600;color:var(--text-secondary)}.difficulty-grid{display:flex;gap:10px}.difficulty-card{flex:1;display:flex;flex-direction:column;align-items:center;gap:8px;padding:18px 12px 14px;border:2px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-primary);cursor:pointer;transition:all .2s var(--ease-smooth);position:relative;font-family:var(--font-family)}.difficulty-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.difficulty-card.active{box-shadow:0 0 0 3px var(--color-accent-glow)}.diff-easy.active{border-color:#10b981;background:#10b98114}.diff-medium.active{border-color:#f59e0b;background:#f59e0b14}.diff-hard.active{border-color:#ef4444;background:#ef444414}.diff-emoji{font-size:32px;line-height:1}.diff-name{font-size:14px;font-weight:700;color:var(--text-primary)}.diff-check{position:absolute;top:8px;right:8px;font-size:14px;font-weight:700;color:var(--color-accent);width:20px;height:20px;display:flex;align-items:center;justify-content:center}.setup-start{width:100%;max-width:400px;margin-top:auto;padding-top:16px}.board-container{display:flex;flex-direction:column;align-items:center;gap:16px;width:100%}.turn-indicator{font-size:15px;font-weight:700;padding:8px 20px;border-radius:var(--radius-full);background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-color);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:var(--shadow-sm)}.turn-you{border-color:var(--color-accent);background:var(--color-accent-light);color:var(--color-accent)}.board{display:grid;gap:6px;width:min(88vw,340px);height:min(88vw,340px);padding:10px;background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.board-5{width:min(94vw,380px);height:min(94vw,380px);gap:4px;padding:8px}.cell{display:flex;align-items:center;justify-content:center;background:var(--bg-primary);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);cursor:default;min-width:44px;min-height:44px;transition:all .15s var(--ease-smooth);-webkit-tap-highlight-color:transparent;position:relative}.cell-clickable{cursor:pointer}.cell-clickable:hover{background:var(--bg-hover);border-color:var(--color-accent);transform:scale(1.03)}.cell-clickable:active{transform:scale(.97)}.cell-x{background:var(--color-x-bg);border-color:transparent}.cell-o{background:var(--color-o-bg);border-color:transparent}.cell-win{background:var(--color-win)!important;border-color:var(--color-win-glow)!important;animation:winPulse .6s ease-in-out infinite alternate}.symbol{font-size:2rem;font-weight:800;animation:symbolAppear .2s var(--ease-spring)}.board-5 .symbol{font-size:1.4rem}.symbol-x{color:var(--color-x);text-shadow:0 0 12px rgba(239,68,68,.3)}.symbol-o{color:var(--color-o);text-shadow:0 0 12px rgba(6,182,212,.3)}@keyframes symbolAppear{0%{transform:scale(0) rotate(-15deg);opacity:0}to{transform:scale(1) rotate(0);opacity:1}}@keyframes winPulse{0%{box-shadow:0 0 0 0 var(--color-win-glow)}to{box-shadow:0 0 12px 2px var(--color-win-glow)}}.timer{width:100%;max-width:340px;display:flex;flex-direction:column;align-items:center;gap:6px}.timer-bar{width:100%;height:6px;background:var(--bg-secondary);border-radius:var(--radius-full);overflow:hidden;border:1px solid var(--border-subtle)}.timer-fill{height:100%;background:var(--gradient-primary);border-radius:var(--radius-full);transition:width 1s linear}.timer-urgent .timer-fill{background:linear-gradient(90deg,#f59e0b,#ef4444)}.timer-text{font-size:13px;font-weight:600;color:var(--text-muted);font-variant-numeric:tabular-nums}.timer-urgent .timer-text{color:var(--color-danger);animation:timerPulse .5s ease-in-out infinite alternate}@keyframes timerPulse{0%{opacity:1}to{opacity:.5}}.score-bar{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 24px;background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-full);box-shadow:var(--shadow-sm)}.score-round{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted)}.score-values{display:flex;align-items:center;gap:14px;font-size:22px;font-weight:800;font-variant-numeric:tabular-nums}.score-player{color:var(--text-primary)}.score-you{color:var(--color-accent)}.score-separator{color:var(--text-muted);font-size:16px}.game-page{display:flex;flex-direction:column;align-items:center;padding:16px;gap:16px;min-height:100dvh}.game-page .btn-danger{margin-top:auto;margin-bottom:24px;border-radius:var(--radius-full);padding:10px 32px;font-size:14px;min-height:40px}.result-page{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 16px;gap:20px;min-height:100dvh}.result-circle{width:120px;height:120px;border-radius:50%;display:flex;align-items:center;justify-content:center;animation:resultPop .5s var(--ease-spring)}.circle-win{background:linear-gradient(135deg,#facc1533,#f59e0b33);box-shadow:0 0 40px #facc1540}.circle-draw{background:var(--color-accent-light);box-shadow:0 0 40px var(--color-accent-glow)}.circle-lose{background:var(--color-danger-bg);box-shadow:0 0 40px #ef444426}.result-emoji{font-size:56px;line-height:1}.result-text{font-size:30px;font-weight:800;text-align:center;letter-spacing:-.5px}.circle-win+.result-text{background:linear-gradient(135deg,#f59e0b,#ef4444);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.result-sub{font-size:15px;color:var(--text-secondary)}.result-actions{display:flex;flex-direction:column;gap:12px;width:100%;max-width:320px;margin-top:16px}@keyframes resultPop{0%{transform:scale(0);opacity:0}60%{transform:scale(1.15)}to{transform:scale(1);opacity:1}}.waiting-page{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;min-height:100dvh;padding:32px}.waiting-animation{width:100px;height:100px;display:flex;align-items:center;justify-content:center;position:relative}.waiting-spinner{width:64px;height:64px;border:3px solid var(--border-color);border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite;position:relative}.waiting-spinner:after{content:"";position:absolute;top:4px;right:4px;bottom:4px;left:4px;border:3px solid transparent;border-bottom-color:var(--color-accent);border-radius:50%;animation:spin 1.2s linear infinite reverse}.waiting-text{font-size:18px;font-weight:600;color:var(--text-primary);text-align:center}.waiting-hint{font-size:14px;color:var(--text-muted);text-align:center;max-width:260px}.waiting-page .btn{min-width:200px}@keyframes spin{to{transform:rotate(360deg)}}.leaderboard-page{display:flex;flex-direction:column;padding:16px;gap:16px;min-height:100dvh}.leaderboard-page .page-top-bar h2{text-align:left;font-size:22px;font-weight:700}.lb-tabs{display:flex;gap:0;background:var(--bg-secondary);border-radius:var(--radius-sm);padding:3px;border:1px solid var(--border-color)}.tab-btn{flex:1;padding:10px 16px;border:none;border-radius:8px;background:transparent;color:var(--text-muted);font-weight:600;font-size:14px;cursor:pointer;min-height:40px;transition:all .2s;font-family:var(--font-family)}.tab-btn.active{background:var(--bg-card);color:var(--text-primary);box-shadow:var(--shadow-sm)}.lb-modes{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}.mode-chip{padding:6px 14px;border:1px solid var(--border-color);border-radius:var(--radius-full);background:var(--bg-card);color:var(--text-muted);font-size:13px;font-weight:600;white-space:nowrap;cursor:pointer;min-height:32px;transition:all .15s;font-family:var(--font-family)}.mode-chip.active{border-color:var(--color-accent);background:var(--color-accent-light);color:var(--color-accent)}.lb-list{display:flex;flex-direction:column;gap:8px}.lb-entry{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-md);transition:transform .15s}.lb-entry:first-child{background:linear-gradient(135deg,#facc1514,#f59e0b14);border-color:#facc1533}.lb-rank{font-weight:800;font-size:15px;min-width:32px;color:var(--text-muted);font-variant-numeric:tabular-nums}.lb-entry:first-child .lb-rank{color:#ca8a04}.lb-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;border:2px solid var(--border-color)}.lb-info{display:flex;flex-direction:column;flex:1;min-width:0}.lb-name{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.lb-stats{font-size:12px;color:var(--text-muted)}.lb-score{font-weight:800;font-size:18px;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.lb-loading{text-align:center;padding:48px;color:var(--text-muted)}.lb-my-position{position:sticky;bottom:12px;display:flex;justify-content:space-between;padding:14px 20px;background:var(--gradient-primary);color:#fff;border-radius:var(--radius-md);font-weight:600;font-size:14px;box-shadow:var(--shadow-lg),var(--shadow-glow)}.profile-page{display:flex;flex-direction:column;padding:24px 16px;gap:24px;max-width:440px;margin:0 auto}.profile-header{display:flex;flex-direction:column;align-items:center;gap:10px}.profile-avatar{width:80px;height:80px;border-radius:50%;object-fit:cover;border:3px solid var(--border-color);box-shadow:var(--shadow-md)}.profile-no-avatar{width:80px;height:80px;border-radius:50%;background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:800;color:#fff}.profile-name{font-size:22px;font-weight:800;margin:0;letter-spacing:-.3px}.profile-username{font-size:14px;color:var(--text-muted)}.profile-stats h3{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:12px}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stat-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 8px;background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-md)}.stat-value{font-size:24px;font-weight:800;color:var(--text-primary);font-variant-numeric:tabular-nums}.stat-label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.3px;color:var(--text-muted)}.profile-scores{display:flex;flex-direction:column;gap:8px}.score-item{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-md);font-weight:600}.score-total{background:var(--color-accent-light);border-color:#6366f126}.score-value{font-weight:800;font-size:18px;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.profile-loading{display:flex;justify-content:center;align-items:center;min-height:100dvh;color:var(--text-muted)}:root{--bg-primary: #fafbfc;--bg-secondary: rgba(255, 255, 255, .72);--bg-card: rgba(255, 255, 255, .85);--bg-hover: rgba(0, 0, 0, .04);--bg-glass: rgba(255, 255, 255, .6);--text-primary: #0f172a;--text-secondary: #64748b;--text-muted: #94a3b8;--border-color: rgba(0, 0, 0, .08);--border-subtle: rgba(0, 0, 0, .04);--gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);--gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);--gradient-cool: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);--gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);--color-accent: #6366f1;--color-accent-hover: #4f46e5;--color-accent-light: rgba(99, 102, 241, .1);--color-accent-glow: rgba(99, 102, 241, .25);--color-x: #ef4444;--color-x-bg: rgba(239, 68, 68, .1);--color-o: #06b6d4;--color-o-bg: rgba(6, 182, 212, .1);--color-win: rgba(250, 204, 21, .2);--color-win-glow: rgba(250, 204, 21, .4);--color-win-text: #ca8a04;--color-danger: #ef4444;--color-danger-bg: rgba(239, 68, 68, .1);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .08);--shadow-glow: 0 0 24px var(--color-accent-glow);--radius-sm: 10px;--radius-md: 16px;--radius-lg: 24px;--radius-full: 9999px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "SF Mono", monospace;--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--ease-smooth: cubic-bezier(.4, 0, .2, 1)}@media (prefers-color-scheme: dark){:root{--bg-primary: #0f172a;--bg-secondary: rgba(30, 41, 59, .72);--bg-card: rgba(30, 41, 59, .85);--bg-hover: rgba(255, 255, 255, .06);--bg-glass: rgba(30, 41, 59, .6);--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--border-color: rgba(255, 255, 255, .08);--border-subtle: rgba(255, 255, 255, .04);--color-accent-light: rgba(99, 102, 241, .15);--color-accent-glow: rgba(99, 102, 241, .3);--color-x-bg: rgba(239, 68, 68, .15);--color-o-bg: rgba(6, 182, 212, .15);--color-win: rgba(250, 204, 21, .15);--color-danger-bg: rgba(239, 68, 68, .15);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .2);--shadow-md: 0 4px 12px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4)}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font-family);background:var(--bg-primary);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overscroll-behavior:none;user-select:none;-webkit-user-select:none;min-height:100dvh}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse 60% 50% at 20% 10%,rgba(99,102,241,.08),transparent),radial-gradient(ellipse 50% 60% at 80% 90%,rgba(168,85,247,.06),transparent);pointer-events:none;z-index:-1}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:var(--radius-md);font-size:15px;font-weight:600;font-family:var(--font-family);cursor:pointer;transition:all .2s var(--ease-smooth);min-height:48px;min-width:48px;-webkit-tap-highlight-color:transparent;position:relative;overflow:hidden}.btn:active{transform:scale(.97)}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-md),0 0 0 0 var(--color-accent-glow)}.btn-primary:hover{box-shadow:var(--shadow-lg),var(--shadow-glow);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0) scale(.98)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-color);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.btn-secondary:hover{background:var(--bg-hover);border-color:var(--color-accent)}.btn-ghost{background:transparent;color:var(--color-accent);font-weight:600}.btn-ghost:hover{background:var(--color-accent-light)}.btn-success{background:var(--gradient-success);color:#fff;box-shadow:var(--shadow-md)}.btn-danger{background:var(--color-danger-bg);color:var(--color-danger);border:1px solid transparent;font-weight:600}.btn-danger:hover{border-color:var(--color-danger)}.btn-large{width:100%;max-width:400px;padding:16px 24px;font-size:17px;border-radius:var(--radius-md)}.glass-card{background:var(--bg-card);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.page-enter{animation:pageIn .3s var(--ease-smooth)}@keyframes pageIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.page-top-bar{display:flex;align-items:center;gap:12px;width:100%;max-width:400px;padding:16px 16px 0}.page-top-bar h2{font-size:22px;font-weight:700;color:var(--text-primary)}.back-btn{width:40px;height:40px;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-primary);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;font-family:var(--font-family);flex-shrink:0}.back-btn:hover{border-color:var(--color-accent)}::-webkit-scrollbar{width:0;height:0}#root{padding-bottom:env(safe-area-inset-bottom)}