*{box-sizing:border-box;margin:0;padding:0}body{color:#3d2b1f;-webkit-font-smoothing:antialiased;background:linear-gradient(135deg,#f5e6d3 0%,#e8d5b7 50%,#d4b896 100%);min-height:100vh;font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,sans-serif}#root{flex-direction:column;min-height:100vh;display:flex}.loading-screen{color:#8b6914;flex-direction:column;justify-content:center;align-items:center;gap:16px;min-height:100vh;display:flex}.loading-spinner{border:3px solid #e8d5b7;border-top-color:#c0392b;border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.login-page{justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.login-card{background:#fffdf7;border-radius:20px;width:100%;max-width:400px;padding:48px 40px;box-shadow:0 8px 32px #0000001f}.login-header{text-align:center;margin-bottom:32px}.login-icon{margin-bottom:12px;font-size:64px}.login-header h1{color:#3d2b1f;margin-bottom:8px;font-size:28px;font-weight:700}.login-header p{color:#8b7355;font-size:14px}.login-form{flex-direction:column;gap:16px;display:flex}.input-group{flex-direction:column;gap:6px;display:flex}.input-group label{color:#5c3a1e;font-size:13px;font-weight:600}.input-group input{color:#3d2b1f;background:#faf8f2;border:2px solid #e0d0bc;border-radius:12px;outline:none;padding:14px 16px;font-size:16px;transition:border-color .2s}.input-group input:focus{border-color:#c0392b}.error-msg{color:#dc2626;text-align:center;background:#fef2f2;border-radius:10px;padding:10px 14px;font-size:13px}.btn{cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:14px 24px;font-family:inherit;font-size:15px;font-weight:600;transition:all .2s;display:inline-flex}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{color:#fff;background:#c0392b}.btn-primary:hover:not(:disabled){background:#a33022}.btn-secondary{color:#5c3a1e;background:#e8d5b7}.btn-secondary:hover:not(:disabled){background:#dcc4a0}.btn-link{color:#8b6914;background:0 0;padding:8px;font-size:13px;text-decoration:underline}.btn-text{color:#8b7355;background:0 0;padding:8px 12px;font-size:14px}.btn-text:hover{background:#0000000d}.btn-share{color:#fff;background:linear-gradient(135deg,#8b6914,#a08418);width:100%;max-width:320px;padding:10px 24px;font-size:14px}.btn-share:hover:not(:disabled){background:linear-gradient(135deg,#735a10,#8b7314)}.home-page{flex-direction:column;min-height:100vh;display:flex}.home-header{background:#fffdf7;border-bottom:1px solid #e8d5b7;justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.user-info{align-items:center;gap:10px;display:flex}.user-avatar{color:#fff;background:#c0392b;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:14px;font-weight:700;display:flex}.user-name{color:#3d2b1f;font-size:14px;font-weight:600}.home-content{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:24px;padding:40px 20px;display:flex}.home-title{text-align:center}.logo-icon{margin-bottom:12px;font-size:72px;line-height:1}.home-title h1{color:#3d2b1f;margin-bottom:8px;font-size:32px;font-weight:700}.home-title p{color:#8b7355;font-size:15px}.action-cards{gap:16px;width:100%;max-width:460px;display:flex}.action-card{cursor:pointer;background:#fffdf7;border:2px solid #e0d0bc;border-radius:16px;flex-direction:column;flex:1;align-items:center;gap:12px;padding:32px 20px;transition:all .2s;display:flex}.action-card:hover{border-color:#c0392b;transform:translateY(-2px);box-shadow:0 4px 16px #c0392b26}.action-card:disabled{opacity:.6;cursor:not-allowed;transform:none}.action-icon{font-size:40px;line-height:1}.action-label{color:#3d2b1f;font-size:16px;font-weight:700}.action-desc{color:#8b7355;text-align:center;font-size:12px}.share-card{text-align:center;background:#fffdf7;border:2px solid #e0d0bc;border-radius:16px;width:100%;max-width:400px;padding:32px}.share-card h3{color:#3d2b1f;margin-bottom:16px;font-size:18px}.room-code-display{letter-spacing:8px;color:#c0392b;background:#faf8f2;border-radius:12px;margin-bottom:12px;padding:16px;font-family:Courier New,monospace;font-size:48px;font-weight:800}.share-hint{color:#8b7355;margin-bottom:16px;font-size:14px}.share-actions{justify-content:center;gap:12px;margin-bottom:16px;display:flex}.waiting-hint{color:#8b6914;font-size:13px;animation:1.5s ease-in-out infinite pulse}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.join-card{background:#fffdf7;border:2px solid #e0d0bc;border-radius:16px;width:100%;max-width:400px;padding:32px}.join-card h3{color:#3d2b1f;text-align:center;margin-bottom:20px;font-size:18px}.room-input{text-align:center;letter-spacing:6px;text-transform:uppercase;font-family:Courier New,monospace;font-weight:700;font-size:24px!important}.join-actions{gap:12px;margin-top:16px;display:flex}.join-actions .btn{flex:1}.game-page{flex-direction:column;align-items:center;min-height:100vh;padding:0 16px 24px;display:flex}.game-header{border-bottom:1px solid #e0d0bc;justify-content:space-between;align-items:center;width:100%;max-width:720px;padding:12px 0;display:flex}.game-status{font-size:15px;font-weight:600}.turn-indicator.red{color:#c0392b}.turn-indicator.black{color:#2d2d2d}.game-over-text{color:#c0392b;font-size:18px}.game-players{justify-content:center;align-items:center;gap:16px;width:100%;max-width:720px;padding:12px 0;display:flex}.player-info{background:#fffdf7;border:2px solid #e0d0bc;border-radius:10px;align-items:center;gap:8px;padding:8px 16px;display:flex}.player-info.me{background:#fff5f2;border-color:#c0392b}.player-tag{color:#fff;border-radius:4px;padding:2px 8px;font-size:11px;font-weight:700}.player-tag.red{background:#c0392b}.player-tag.black{background:#2d2d2d}.player-name{color:#3d2b1f;font-size:14px;font-weight:600}.player-badge{color:#c0392b;background:#fef2f2;border-radius:4px;padding:1px 6px;font-size:11px}.vs{color:#8b7355;font-size:14px;font-weight:700}.chess-board-container{justify-content:center;padding:16px 0;display:flex}.board{background:#f0d9a0;border:3px solid #5c3a1e;border-radius:4px;width:720px;height:800px;position:relative;overflow:hidden}.board-lines{pointer-events:none;width:100%;height:100%;position:absolute;top:0;left:0}.cell{cursor:pointer;z-index:1;justify-content:center;align-items:center;display:flex}.move-indicator{pointer-events:none;background:#0003;border-radius:50%;width:16px;height:16px}.piece{cursor:pointer;-webkit-user-select:none;user-select:none;border:2px solid;border-radius:50%;justify-content:center;align-items:center;width:52px;height:52px;font-family:KaiTi,STKaiti,SimSun,serif;font-size:20px;font-weight:700;transition:transform .15s;display:flex;box-shadow:1px 2px 6px #00000040}.piece.red{color:#c0392b;background:radial-gradient(circle at 35% 35%,#fff5f0,#f0c0b0);border-color:#c0392b}.piece.black{color:#1a1a1a;background:radial-gradient(circle at 35% 35%,#f0f0f0,#d0d0d0);border-color:#333}.piece.selected{transform:scale(1.1);box-shadow:0 0 0 3px #f1c40f,0 0 16px #f1c40f80}.piece.capture-target{box-shadow:0 0 0 3px #e74c3c,0 0 16px #e74c3c66}.piece:hover{transform:scale(1.05)}.game-footer{flex-direction:column;align-items:center;gap:8px;width:100%;max-width:720px;padding:12px;display:flex}.room-code-hint{color:#8b7355;font-size:13px}.waiting-opponent{color:#8b6914;font-size:14px;animation:1.5s ease-in-out infinite pulse}.turn-message{color:#5c3a1e;font-size:14px}@media (width<=760px){.board{width:360px;height:400px}.board-lines{transform-origin:0 0;transform:scale(.5)}.piece{width:32px;height:32px;font-size:13px}.cell{transform-origin:50%;transform:scale(.65)}.action-cards{flex-direction:column}.game-players{flex-wrap:wrap}}