/* ===========================================
   按国籍分类棋手页面专业样式
   =========================================== */

/* ===========================================
   1. 页面标题样式
   =========================================== */
.nationality-page-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.nationality-page-title {
    position: relative;
    display: inline-block;
    margin-bottom: 10px;
}

.nationality-page-title i {
    color: #0d6efd;
    margin-right: 10px;
    text-shadow: 0 2px 4px rgba(13, 110, 253, 0.3);
}

.nationality-page-subtitle {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 10px;
}

/* ===========================================
   2. 国家/地区卡片容器
   =========================================== */
.nationality-section {
    margin-bottom: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: all 0.3s ease;
}

.nationality-section:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

/* ===========================================
   3. 国家/地区头部
   =========================================== */
.nationality-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 25px 30px;
    border-bottom: 2px solid #e9ecef;
    display: flex;
    align-items: center;
    gap: 15px;
}

.nationality-flag {
    width: 50px;
    height: 38px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.nationality-section:hover .nationality-flag {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.nationality-title-info {
    flex: 1;
}

.nationality-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: #212529;
    margin-bottom: 5px;
}

.nationality-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 0.9rem;
    color: #6c757d;
}

.nationality-stat-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nationality-stat-badge {
    background: linear-gradient(135deg, #e9ecef 0%, #f8f9fa 100%);
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 600;
    color: #495057;
}

/* ===========================================
   4. 棋手网格布局
   =========================================== */
.nationality-player-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 15px;
    padding: 25px;
}

/* ===========================================
   5. 棋手卡片样式
   =========================================== */
.nationality-player-card {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: flex-start;
    gap: 14px;
    position: relative;
    overflow: hidden;
    min-height: 90px;
}

.nationality-player-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #0d6efd 0%, #0dcaf0 100%);
    transition: width 0.3s ease;
}

.nationality-player-card:hover {
    transform: translateY(-3px);
    border-color: #0d6efd;
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.15);
}

.nationality-player-card:hover::before {
    width: 6px;
}

/* 棋手头像 */
.nationality-player-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 3px solid #e9ecef;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
    cursor: pointer;
    object-fit: cover;
}

.nationality-player-card:hover .nationality-player-avatar {
    border-color: #0d6efd;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

/* 棋手信息 */
.nationality-player-info {
    flex: 1;
    min-width: 0;
}

.nationality-player-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: #212529;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nationality-player-name:hover {
    color: #0d6efd;
}

/* 排名badge hover效果（Bootstrap badge默认没有hover） */
.badge.bg-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.4) !important;
}

/* ===========================================
   6. 空状态占位
   =========================================== */
.nationality-player-placeholder {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e9ecef 0%, #f8f9fa 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 3px solid #dee2e6;
}

.nationality-player-placeholder i {
    font-size: 1.5rem;
    color: #adb5bd;
}

/* ===========================================
   7. 响应式设计
   =========================================== */
@media (max-width: 1200px) {
    .nationality-player-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 12px;
        padding: 20px;
    }

    .nationality-header {
        padding: 20px 25px;
    }
}

@media (max-width: 992px) {
    .nationality-player-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 10px;
        padding: 15px;
    }

    .nationality-header {
        padding: 18px 20px;
    }

    .nationality-name {
        font-size: 1.2rem;
    }

    .nationality-stats {
        font-size: 0.85rem;
    }
}

@media (max-width: 768px) {
    .nationality-page-header {
        padding: 20px;
        margin-bottom: 20px;
    }

    .nationality-player-grid {
        grid-template-columns: 1fr;
        gap: 10px;
        padding: 15px;
    }

    .nationality-header {
        padding: 15px;
        flex-wrap: wrap;
    }

    .nationality-flag {
        width: 45px;
        height: 34px;
    }

    .nationality-name {
        font-size: 1.1rem;
    }

    .nationality-stats {
        font-size: 0.8rem;
        gap: 10px;
    }

    .nationality-player-card {
        padding: 12px;
        min-height: 80px;
    }

    .nationality-player-avatar,
    .nationality-player-placeholder {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 576px) {
    .nationality-page-title {
        font-size: 1.3rem;
    }

    .nationality-page-subtitle {
        font-size: 0.8rem;
    }

    .nationality-section {
        margin-bottom: 25px;
    }

    .nationality-header {
        padding: 12px;
    }

    .nationality-flag {
        width: 40px;
        height: 30px;
    }

    .nationality-name {
        font-size: 1rem;
    }

    .nationality-stats {
        font-size: 0.75rem;
    }

    .nationality-player-card {
        padding: 10px;
        min-height: 75px;
    }

    .nationality-player-avatar,
    .nationality-player-placeholder {
        width: 42px;
        height: 42px;
    }

    .nationality-player-name {
        font-size: 0.9rem;
    }

    .nationality-player-meta {
        font-size: 0.75rem;
        gap: 6px;
    }

    .nationality-rank-link {
        font-size: 0.75rem;
        padding: 4px 8px;
    }

    .nationality-rank-link i {
        font-size: 0.8rem;
    }
}

/* ===========================================
   8. 暗黑主题适配
   =========================================== */
[data-bs-theme="dark"],
[data-bs-theme="dark-small"] {
    --nationality-bg: #212529;
    --nationality-card-bg: #343a40;
    --nationality-card-hover-bg: #495057;
    --nationality-border: rgba(255, 255, 255, 0.1);
    --nationality-text-primary: #f8f9fa;
    --nationality-text-secondary: #adb5bd;
    --nationality-header-bg-start: #2d3238;
    --nationality-header-bg-end: #343a40;
}

[data-bs-theme="dark"] .nationality-page-header,
[data-bs-theme="dark-small"] .nationality-page-header {
    background: linear-gradient(135deg, var(--nationality-header-bg-start) 0%, var(--nationality-header-bg-end) 100%);
    border-color: var(--nationality-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .nationality-page-title,
[data-bs-theme="dark-small"] .nationality-page-title {
    color: var(--nationality-text-primary);
}

[data-bs-theme="dark"] .nationality-page-title i,
[data-bs-theme="dark-small"] .nationality-page-title i {
    color: #0dcaf0;
}

[data-bs-theme="dark"] .nationality-page-subtitle,
[data-bs-theme="dark-small"] .nationality-page-subtitle {
    color: var(--nationality-text-secondary);
}

[data-bs-theme="dark"] .nationality-section,
[data-bs-theme="dark-small"] .nationality-section {
    background: var(--nationality-card-bg);
    border-color: var(--nationality-border);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .nationality-section:hover,
[data-bs-theme="dark-small"] .nationality-section:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

[data-bs-theme="dark"] .nationality-header,
[data-bs-theme="dark-small"] .nationality-header {
    background: linear-gradient(135deg, #2d3238 0%, var(--nationality-card-bg) 100%);
    border-bottom-color: var(--nationality-border);
}

[data-bs-theme="dark"] .nationality-flag,
[data-bs-theme="dark-small"] .nationality-flag {
    border-color: var(--nationality-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

[data-bs-theme="dark"] .nationality-name,
[data-bs-theme="dark-small"] .nationality-name {
    color: var(--nationality-text-primary);
}

[data-bs-theme="dark"] .nationality-stats,
[data-bs-theme="dark-small"] .nationality-stats {
    color: var(--nationality-text-secondary);
}

[data-bs-theme="dark"] .nationality-stat-badge,
[data-bs-theme="dark-small"] .nationality-stat-badge {
    background: linear-gradient(135deg, #495057 0%, #343a40 100%);
    color: var(--nationality-text-primary);
}

[data-bs-theme="dark"] .nationality-player-card,
[data-bs-theme="dark-small"] .nationality-player-card {
    background: var(--nationality-card-bg);
    border-color: var(--nationality-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .nationality-player-card:hover,
[data-bs-theme="dark-small"] .nationality-player-card:hover {
    background: var(--nationality-card-hover-bg);
    border-color: #0dcaf0;
    box-shadow: 0 6px 20px rgba(13, 202, 240, 0.3);
}

[data-bs-theme="dark"] .nationality-player-card::before,
[data-bs-theme="dark-small"] .nationality-player-card::before {
    background: linear-gradient(135deg, #0dcaf0 0%, #20c997 100%);
}

[data-bs-theme="dark"] .nationality-player-avatar,
[data-bs-theme="dark-small"] .nationality-player-avatar {
    border-color: var(--nationality-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .nationality-player-card:hover .nationality-player-avatar,
[data-bs-theme="dark-small"] .nationality-player-card:hover .nationality-player-avatar {
    border-color: #0dcaf0;
    box-shadow: 0 4px 12px rgba(13, 202, 240, 0.4);
}

[data-bs-theme="dark"] .nationality-player-name,
[data-bs-theme="dark-small"] .nationality-player-name {
    color: var(--nationality-text-primary);
}

[data-bs-theme="dark"] .nationality-player-name:hover,
[data-bs-theme="dark-small"] .nationality-player-name:hover {
    color: #0dcaf0;
}

/* 暗黑主题下的排名badge */
[data-bs-theme="dark"] .badge.bg-gradient,
[data-bs-theme="dark-small"] .badge.bg-gradient {
    background: linear-gradient(135deg, #0dcaf0 0%, #20c997 100%) !important;
}

[data-bs-theme="dark"] .badge.bg-gradient:hover,
[data-bs-theme="dark-small"] .badge.bg-gradient:hover {
    box-shadow: 0 4px 12px rgba(13, 202, 240, 0.5) !important;
}

[data-bs-theme="dark"] .nationality-player-placeholder,
[data-bs-theme="dark-small"] .nationality-player-placeholder {
    background: linear-gradient(135deg, #495057 0%, #343a40 100%);
}

[data-bs-theme="dark"] .nationality-player-placeholder i,
[data-bs-theme="dark-small"] .nationality-player-placeholder i {
    color: #6c757d;
}