/* 五子棋样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2A2D43;
    --secondary-color: #4ECDC4;
    --board-bg: #DEB887;
    --line-color: #5D4E37;
    --black-stone: #1a1a1a;
    --white-stone: #f5f5f5;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    --radius: 8px;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #2A2D43;
}

.gomoku-container {
    max-width: 520px;
    margin: 0 auto;
    background: #F7F9FC;
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    padding: 20px;
}

.gomoku-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.back-link {
    color: #666;
    text-decoration: none;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.back-link:hover {
    color: var(--primary-color);
}

.gomoku-header h1 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 设置面板 */
.setup-panel .mode-group,
.setup-panel .difficulty-group,
.setup-panel .color-group {
    margin-bottom: 16px;
}

.mode-label,
.difficulty-label,
.color-label {
    display: block;
    font-size: 0.9rem;
    color: #555;
    margin-bottom: 8px;
}

.mode-btns,
.difficulty-btns,
.color-btns {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.mode-btn,
.difficulty-btn,
.color-btn {
    padding: 10px 18px;
    border: 2px solid #DEE2E6;
    border-radius: 50px;
    background: white;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.mode-btn:hover,
.difficulty-btn:hover,
.color-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.mode-btn.active,
.difficulty-btn.active,
.color-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.online-setup .room-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.room-list-wrap {
    margin-bottom: 12px;
}

.room-list-section {
    margin-bottom: 16px;
}

.room-list-section:last-child {
    margin-bottom: 0;
}

.room-section-title {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.room-list-label {
    display: block;
    font-size: 0.9rem;
    color: #555;
    margin-bottom: 8px;
}

.connection-status {
    font-size: 0.8rem;
    color: #27ae60;
}

.connection-status:empty {
    display: none;
}

.room-list {
    list-style: none;
    max-height: 200px;
    overflow-y: auto;
    border: 2px solid #DEE2E6;
    border-radius: 8px;
    padding: 8px;
}

.room-list-empty {
    padding: 16px;
    text-align: center;
    color: #888;
    font-size: 0.95rem;
}

.room-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    margin-bottom: 6px;
    background: #f8f9fa;
    border-radius: 8px;
    gap: 10px;
}

.room-item:last-child {
    margin-bottom: 0;
}

.room-item-info {
    flex: 1;
    min-width: 0;
}

.room-item-id {
    font-weight: 700;
    font-family: monospace;
}

.room-item-status {
    font-size: 0.85rem;
    color: #666;
}

.room-item-status.waiting {
    color: #27ae60;
}

.room-item-status.playing {
    color: #e67e22;
}

.room-item-btns {
    display: flex;
    gap: 6px;
}

.room-item-btns .btn {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.spectator-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px;
    background: #e8f4f8;
    border-radius: var(--radius);
    margin-top: 12px;
    font-size: 0.95rem;
    color: #555;
}

.spectator-notice .btn-sm {
    padding: 6px 14px;
    font-size: 0.85rem;
}

.room-info {
    padding: 12px;
    background: #e8f4f8;
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.room-info p {
    margin-bottom: 4px;
    font-size: 0.95rem;
}

.btn-start {
    margin-top: 16px;
    width: 100%;
    padding: 14px;
}

/* 按钮通用 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 50px;
    font-size: 0.95rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid #DEE2E6;
}

.btn-secondary:hover {
    border-color: var(--primary-color);
}

.btn-danger {
    background: #EF476F;
    color: white;
}

.btn-danger:hover {
    background: #d63557;
}

/* 游戏面板 */
.game-panel {
    padding-top: 8px;
}

.game-room-info {
    text-align: center;
    padding: 8px 12px;
    margin-bottom: 8px;
    background: #e8f4f8;
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: #555;
}

.game-room-info strong {
    font-family: monospace;
    color: var(--primary-color);
}

.status-bar {
    text-align: center;
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.game-status {
    font-weight: 700;
}

.turn-indicator {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    margin-left: 8px;
    vertical-align: middle;
}

.turn-indicator.black { background: var(--black-stone); }
.turn-indicator.white { background: var(--white-stone); border: 1px solid #ccc; }

.board-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
    background: var(--board-bg);
    padding: 15px;
    border-radius: 8px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.1);
}

#gomoku-board {
    display: block;
    cursor: pointer;
}

.action-btns {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* 弹窗 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    max-width: 90%;
    overflow: hidden;
}

.modal-sm {
    width: 320px;
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid #eee;
}

.modal-header h2 {
    font-size: 1.2rem;
}

.modal-body {
    padding: 20px;
}

.modal-body p {
    margin: 0;
    font-size: 1rem;
}

.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid #eee;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}