/* ============================================================
 * 在线五子棋 - 紫色渐变 UI
 * ============================================================ */
.gmk-wrap {
    --gmk-purple-1: #667eea;
    --gmk-purple-2: #764ba2;
    --gmk-radius: 14px;
    --gmk-shadow: 0 6px 24px rgba(118, 75, 162, 0.15);
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: #333;
    box-sizing: border-box;
}
.gmk-wrap *,
.gmk-wrap *::before,
.gmk-wrap *::after {
    box-sizing: border-box;
}

.gmk-wrap a {
    text-decoration: none;
}

/* 顶部 */
.gmk-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    margin-bottom: 20px;
    border-radius: var(--gmk-radius);
    background: linear-gradient(135deg, var(--gmk-purple-1) 0%, var(--gmk-purple-2) 100%);
    color: #fff;
    box-shadow: var(--gmk-shadow);
}
.gmk-header-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 1px;
}
.gmk-logo {
    font-size: 26px;
    line-height: 1;
}
.gmk-user-badge {
    background: rgba(255, 255, 255, 0.22);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

/* 主体两栏 */
.gmk-body {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    align-items: start;
}
@media (max-width: 860px) {
    .gmk-body {
        grid-template-columns: 1fr;
    }
}

/* 面板 */
.gmk-panel {
    background: #fff;
    border-radius: var(--gmk-radius);
    padding: 18px;
    box-shadow: var(--gmk-shadow);
    margin-bottom: 18px;
}
.gmk-panel:last-child {
    margin-bottom: 0;
}
.gmk-panel-title {
    font-size: 15px;
    font-weight: 700;
    color: #4a3a6b;
    margin: 0 0 14px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid;
    border-image: linear-gradient(90deg, var(--gmk-purple-1), var(--gmk-purple-2)) 1;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* 列表 */
.gmk-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 320px;
    overflow-y: auto;
}
.gmk-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 10px;
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border: 1px solid #ece7ff;
    transition: all 0.2s ease;
}
.gmk-list-item:hover {
    border-color: var(--gmk-purple-1);
    transform: translateX(2px);
}
.gmk-user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.gmk-user-name {
    font-weight: 600;
    font-size: 14px;
    color: #2d2440;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.gmk-user-ago {
    font-size: 11px;
    color: #9a8fb5;
}
.gmk-empty {
    text-align: center;
    color: #b3a9c9;
    font-size: 13px;
    padding: 18px 0;
}

/* 邀请卡片 */
.gmk-invite-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    border-radius: 10px;
    background: linear-gradient(135deg, #fff4f8 0%, #f5f3ff 100%);
    border: 1px solid #f0e6ff;
}
.gmk-invite-card .gmk-invite-text {
    font-size: 13px;
    color: #4a3a6b;
}
.gmk-invite-card .gmk-invite-text b {
    color: var(--gmk-purple-2);
}
.gmk-invite-actions {
    display: flex;
    gap: 8px;
}
.gmk-invite-actions .gmk-btn {
    flex: 1;
    padding: 6px 10px;
    font-size: 13px;
}

/* 按钮 */
.gmk-btn {
    cursor: pointer;
    border: none;
    border-radius: 10px;
    padding: 9px 18px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--gmk-purple-1) 0%, var(--gmk-purple-2) 100%);
    transition: all 0.25s ease;
    box-shadow: 0 4px 12px rgba(118, 75, 162, 0.3);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    line-height: 1.2;
}
.gmk-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(118, 75, 162, 0.42);
}
.gmk-btn:active:not(:disabled) {
    transform: translateY(0);
}
.gmk-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    box-shadow: none;
}
.gmk-btn-ghost {
    background: #fff;
    color: var(--gmk-purple-2);
    border: 1px solid #e4d9f7;
    box-shadow: none;
}
.gmk-btn-ghost:hover:not(:disabled) {
    background: #f5f3ff;
}
.gmk-btn-sm {
    padding: 5px 12px;
    font-size: 12px;
    border-radius: 8px;
}
.gmk-btn-danger {
    background: linear-gradient(135deg, #ff6b6b 0%, #c0392b 100%);
    box-shadow: 0 4px 12px rgba(192, 57, 43, 0.3);
}

/* 棋盘区 */
.gmk-main {
    min-width: 0;
}
.gmk-board-panel {
    padding: 20px;
}
.gmk-game-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    gap: 12px;
}
.gmk-player {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 24px;
    background: #f5f3ff;
    border: 1px solid #ece7ff;
    flex: 1;
    min-width: 0;
}
.gmk-player.active {
    border-color: var(--gmk-purple-2);
    background: linear-gradient(135deg, #ede9fe 0%, #ddd6fe 100%);
    box-shadow: 0 0 0 3px rgba(118, 75, 162, 0.18);
}
.gmk-player-name {
    font-weight: 600;
    font-size: 13px;
    color: #4a3a6b;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.gmk-stone-mini {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    flex-shrink: 0;
}
.gmk-stone-black {
    background: radial-gradient(circle at 35% 30%, #555 0%, #111 70%);
    box-shadow: inset -2px -2px 4px rgba(0, 0, 0, 0.5);
}
.gmk-stone-white {
    background: radial-gradient(circle at 35% 30%, #fff 0%, #d8d8e0 80%);
    box-shadow: inset -2px -2px 4px rgba(120, 120, 140, 0.4);
    border: 1px solid #cfc8dc;
}
.gmk-turn-box {
    text-align: center;
    font-weight: 700;
    font-size: 14px;
    color: var(--gmk-purple-2);
    padding: 8px 14px;
    background: rgba(118, 75, 162, 0.08);
    border-radius: 20px;
    white-space: nowrap;
}

.gmk-board-wrap {
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #2d2150 0%, #4b2e83 100%);
    border-radius: var(--gmk-radius);
    padding: 14px;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.2);
}
#gmk-board {
    display: block;
    max-width: 100%;
    height: auto;
    cursor: pointer;
    border-radius: 8px;
    touch-action: none;
}

.gmk-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 16px;
}
.gmk-msg {
    text-align: center;
    margin-top: 12px;
    min-height: 22px;
    font-size: 14px;
    font-weight: 600;
}
.gmk-msg.info { color: #667eea; }
.gmk-msg.success { color: #2e8b57; }
.gmk-msg.error { color: #e74c3c; }
.gmk-msg.win {
    color: #fff;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 10px;
    border-radius: 10px;
}

/* 登录提示 */
.gmk-login-required {
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}
.gmk-login-card {
    text-align: center;
    background: #fff;
    border-radius: var(--gmk-radius);
    padding: 40px 36px;
    box-shadow: var(--gmk-shadow);
    max-width: 380px;
}
.gmk-login-icon {
    font-size: 56px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--gmk-purple-1), var(--gmk-purple-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.gmk-login-card h2 {
    color: #4a3a6b;
    margin: 0 0 10px 0;
    font-size: 22px;
}
.gmk-login-card p {
    color: #8a7fa5;
    margin: 0 0 22px 0;
    font-size: 14px;
}

/* 滚动条 */
.gmk-list::-webkit-scrollbar {
    width: 6px;
}
.gmk-list::-webkit-scrollbar-thumb {
    background: var(--gmk-purple-1);
    border-radius: 4px;
}
.gmk-list::-webkit-scrollbar-track {
    background: transparent;
}