:root{--primary: #6366f1;--primary-hover: #4f46e5;--bg-main: #f8fafc;--bg-card: #ffffff;--text-main: #1e293b;--text-muted: #64748b;--border-color: #e2e8f0;--wood-board: #fbc531}*{box-sizing:border-box;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}body{background-color:var(--bg-main);color:var(--text-main);overflow-x:hidden}.app-container{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background-color:var(--bg-card);border-bottom:1px solid var(--border-color)}.header-left{display:flex;align-items:center;gap:.75rem;cursor:pointer}.logo-icon{font-size:1.8rem}.header-left h1{font-size:1.25rem;font-weight:700;color:var(--text-main)}.sync-badge{font-size:.8rem;color:var(--text-muted);background-color:#f1f5f9;padding:.25rem .75rem;border-radius:999px;transition:all .3s ease}.sync-badge.syncing{background-color:#e0e7ff;color:var(--primary)}.app-main{flex:1;padding:2rem;max-width:1200px;width:100%;margin:0 auto}.lobby-container{display:flex;flex-direction:column;gap:2rem}.stats-dashboard{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.stat-card{background:var(--bg-card);padding:1.5rem;border-radius:12px;border:1px solid var(--border-color);display:flex;align-items:center;gap:1rem;box-shadow:0 1px 3px #00000005}.stat-icon{width:2.5rem;height:2.5rem}.text-indigo{color:#6366f1}.text-amber{color:#f59e0b}.text-emerald{color:#10b981}.stat-info{display:flex;flex-direction:column}.stat-label{font-size:.85rem;color:var(--text-muted)}.stat-value{font-size:1.5rem;font-weight:700}.section-title{font-size:1.2rem;font-weight:600;color:var(--text-main)}.game-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem}.game-card{background:var(--bg-card);border-radius:16px;border:1px solid var(--border-color);overflow:hidden;cursor:pointer;position:relative;transition:transform .2s,box-shadow .2s}.game-card:hover{transform:translateY(-4px);box-shadow:0 10px 20px #0000000d}.game-badge{position:absolute;top:1rem;left:1rem;padding:.25rem .75rem;border-radius:999px;font-size:.75rem;font-weight:600;color:#fff;z-index:10}.gomoku-badge{background-color:#6366f1}.xiangqi-badge{background-color:#e11d48}.chess-badge{background-color:#475569}.game-cover{height:160px;display:flex;align-items:center;justify-content:center;position:relative}.gomoku-cover{background:radial-gradient(circle,#fef08a,#facc15)}.gomoku-art{display:flex;gap:1rem}.stone{width:40px;height:40px;border-radius:50%;box-shadow:0 4px 6px #00000026}.black-stone{background-color:#1e293b}.white-stone{background-color:#fff}.xiangqi-cover{background:radial-gradient(circle,#ffedd5,#fed7aa);font-weight:700;color:#c2410c;font-size:1.5rem;letter-spacing:.5rem}.chess-cover{background:radial-gradient(circle,#f1f5f9,#cbd5e1);font-size:2.5rem}.game-details{padding:1.5rem}.game-details h3{font-size:1.1rem;margin-bottom:.5rem}.game-details p{font-size:.85rem;color:var(--text-muted);line-height:1.5;margin-bottom:1.5rem;height:3rem}.game-footer{display:flex;justify-content:space-between;align-items:center}.game-stat{font-size:.8rem;color:var(--text-muted)}.play-btn{background-color:var(--primary);color:#fff;border:none;padding:.5rem 1.25rem;border-radius:8px;font-size:.85rem;cursor:pointer;transition:background-color .2s}.game-card:hover .play-btn{background-color:var(--primary-hover)}.game-room{display:grid;grid-template-columns:1fr 340px;gap:2rem;align-items:start}.board-area{background:var(--bg-card);border-radius:16px;border:1px solid var(--border-color);padding:1.5rem;display:flex;flex-direction:column;align-items:center;position:relative}.board-header{width:100%;display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.back-btn{display:flex;align-items:center;gap:.25rem;background:none;border:none;color:var(--text-muted);font-size:.9rem;cursor:pointer}.back-btn:hover{color:var(--primary)}.control-panel{display:flex;flex-direction:column;gap:1.5rem}.timer-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.timer-box{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:1rem;display:flex;flex-direction:column;align-items:center;transition:all .3s ease}.timer-box.active{border-color:var(--primary);box-shadow:0 0 12px #6366f126;background-color:#f5f3ff}.player-label{font-size:.8rem;color:var(--text-muted);margin-bottom:.25rem}.time-digits{font-size:1.5rem;font-weight:700;font-family:monospace}.action-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem}.action-btn{display:flex;align-items:center;justify-content:center;gap:.25rem;padding:.6rem;border-radius:8px;border:1px solid var(--border-color);background:var(--bg-card);font-size:.85rem;cursor:pointer;transition:all .2s}.action-btn:hover{background-color:#f8fafc}.action-btn.resign{color:#ef4444}.action-btn.resign:hover{background-color:#fef2f2}.ai-coach-section{background:linear-gradient(135deg,#f5f3ff,#ede9fe);border:1px solid #ddd6fe;border-radius:12px;padding:1rem}.ai-coach-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:.5rem;background-color:var(--primary);color:#fff;border:none;padding:.75rem;border-radius:8px;font-weight:600;font-size:.9rem;cursor:pointer;box-shadow:0 4px 6px #6366f126}.ai-coach-btn:hover{background-color:var(--primary-hover)}.ai-advice-bubble{margin-top:.75rem;background:#fff;border-radius:8px;padding:.75rem;border:1px solid #e9d5ff}.bubble-header{display:flex;align-items:center;gap:.5rem;font-size:.8rem;margin-bottom:.25rem}.bubble-content{font-size:.85rem;line-height:1.5;color:#475569}.history-log{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:1rem;display:flex;flex-direction:column;height:250px}.log-header{display:flex;align-items:center;gap:.5rem;font-weight:600;font-size:.85rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.log-list{flex:1;overflow-y:auto;margin-top:.5rem;display:flex;flex-direction:column;gap:.4rem}.empty-log{text-align:center;color:var(--text-muted);font-size:.8rem;margin-top:2rem}.log-item{display:flex;align-items:center;gap:.5rem;font-size:.8rem;padding:.25rem .5rem;border-radius:4px;background-color:#f8fafc}.log-step{color:var(--text-muted);font-weight:700}.log-player{padding:.1rem .4rem;border-radius:4px;font-size:.75rem;font-weight:600}.log-player.black{background-color:#1e293b;color:#fff}.log-player.white{background-color:#e2e8f0;color:#1e293b}.log-player.red{background-color:#ef4444;color:#fff}.log-desc{color:var(--text-main);flex:1}.gomoku-board-wrapper{background-color:#f5d6a7;padding:12px;border-radius:8px;box-shadow:inset 0 0 10px #00000026,0 4px 12px #0000001a}.gomoku-board{display:flex;flex-direction:column;border:1px solid #855e42}.gomoku-row{display:flex}.gomoku-cell{width:32px;height:32px;border:1px solid #855e42;position:relative;cursor:pointer;display:flex;align-items:center;justify-content:center}.star-point{width:6px;height:6px;background-color:#855e42;border-radius:50%;position:absolute}.gomoku-stone{width:26px;height:26px;border-radius:50%;position:relative;z-index:5;box-shadow:0 2px 4px #0000004d}.gomoku-stone.black{background:radial-gradient(circle at 30% 30%,#4b5563,#111827)}.gomoku-stone.white{background:radial-gradient(circle at 30% 30%,#fff,#d1d5db)}.stone-shine{position:absolute;top:15%;left:15%;width:6px;height:6px;background:#fff6;border-radius:50%}.xiangqi-board-wrapper{background-color:#fed7aa;padding:16px;border-radius:12px;box-shadow:inset 0 0 12px #0003,0 4px 12px #0000001a}.xiangqi-board{display:flex;flex-direction:column;border:2px solid #854d0e;background-color:#ffedd5;position:relative}.xiangqi-row{display:flex}.xiangqi-cell{width:50px;height:50px;border:1px solid #b45309;display:flex;align-items:center;justify-content:center;position:relative;cursor:pointer}.river-text{font-size:1.2rem;font-weight:800;color:#b4530966;pointer-events:none}.xiangqi-piece{width:42px;height:42px;border-radius:50%;background-color:#fef3c7;border:2px solid #78350f;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;cursor:pointer;box-shadow:0 3px 6px #0003;-webkit-user-select:none;user-select:none;transition:transform .1s}.xiangqi-piece.red{color:#dc2626;border-color:#991b1b}.xiangqi-piece.black{color:#1e293b;border-color:#0f172a}.xiangqi-piece.selected{transform:scale(1.15);box-shadow:0 0 12px #6366f1;border-color:#6366f1}.chess-board-wrapper{background-color:#e2e8f0;padding:10px;border-radius:8px;box-shadow:0 4px 12px #0000001a}.chess-board{display:flex;flex-direction:column;border:4px solid #475569}.chess-row{display:flex}.chess-cell{width:55px;height:55px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background-color .2s}.chess-cell.light{background-color:#f1f5f9}.chess-cell.dark{background-color:#64748b}.chess-cell.selected{background-color:#c7d2fe!important}.chess-piece{font-size:2.5rem;-webkit-user-select:none;user-select:none;filter:drop-shadow(0 2px 3px rgba(0,0,0,.2))}.chess-piece.white{color:#fff;-webkit-text-stroke:1px #000}.chess-piece.black{color:#1e293b}.winner-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#0f172abf;display:flex;align-items:center;justify-content:center;border-radius:16px;z-index:100}.winner-card{background:#fff;padding:2.5rem;border-radius:16px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:1rem;box-shadow:0 20px 25px -5px #0000001a}.winner-icon{animation:bounce 1s infinite}.restart-btn{background-color:var(--primary);color:#fff;border:none;padding:.75rem 2rem;border-radius:8px;font-weight:600;cursor:pointer;transition:background-color .2s}.restart-btn:hover{background-color:var(--primary-hover)}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}