:root {
    --primary-blue: #0056b3;
    --bg-light: #f4f7fa;
    --text-main: #1e293b;
}

body {
    font-family: 'Be Vietnam Pro', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-main);
}

/* Header gọn gàng */
.page-header {
    background: #fff;
    padding: 20px 0;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

/* Thanh công cụ lọc */
.filter-bar {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
    margin-bottom: 20px;
}

.form-label {
    font-weight: 600;
    font-size: 0.85rem;
    color: #64748b;
}

.form-select, .form-control {
    border-radius: 8px;
    border-color: #e2e8f0;
    font-size: 0.95rem;
}

    .form-select:focus, .form-control:focus {
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
    }

/* Bảng dữ liệu */
.ranking-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.table thead th {
    background-color: #f8fafc;
    color: #475569;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    border-bottom: 2px solid #e2e8f0;
    padding: 15px;
}

.table tbody td {
    padding: 15px;
    vertical-align: middle;
    font-size: 0.95rem;
}

.rank-badge {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin: 0 auto;
    font-size: 0.9rem;
    background: #f1f5f9;
    color: #64748b;
}

.rank-1 {
    background: #FFD700;
    color: #fff;
    box-shadow: 0 2px 5px rgba(255, 215, 0, 0.4);
}

.rank-2 {
    background: #C0C0C0;
    color: #fff;
}

.rank-3 {
    background: #CD7F32;
    color: #fff;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}

.bg-success-soft {
    background-color: #dcfce7;
    color: #166534;
}

.bg-primary-soft {
    background-color: #e0f2fe;
    color: #075985;
}