/**
 * ============================================================================
 * CARDS COMPONENT
 * ============================================================================
 * 
 * Card component styling and variations
 */

/* === BASE CARD STYLES === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* === CARD HEADER === */
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.card-header h1,
.card-header h2,
.card-header h3,
.card-header h4,
.card-header h5,
.card-header h6 {
    margin-bottom: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* === CARD BODY === */
.card-body {
    padding: var(--spacing-xl);
    color: var(--text-primary);
}

/* === CARD FOOTER === */
.card-footer {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-xl);
    color: var(--text-secondary);
}

/* === CARD VARIATIONS === */

/* Elevated Card */
.card-elevated {
    box-shadow: var(--shadow-xl);
    border: none;
}

.card-elevated:hover {
    box-shadow: var(--shadow-2xl);
    transform: translateY(-4px);
}

/* Bordered Card */
.card-bordered {
    border: 2px solid var(--primary-color);
    box-shadow: none;
}

/* Flat Card */
.card-flat {
    box-shadow: none;
    border: 1px solid var(--border-color);
}

/* Success Card */
.card-success {
    border-left: 4px solid var(--success-color);
}

.card-success .card-header {
    color: var(--success-color);
}

/* Warning Card */
.card-warning {
    border-left: 4px solid var(--warning-color);
}

.card-warning .card-header {
    color: var(--warning-color);
}

/* Danger Card */
.card-danger {
    border-left: 4px solid var(--danger-color);
}

.card-danger .card-header {
    color: var(--danger-color);
}

/* Info Card */
.card-info {
    border-left: 4px solid var(--info-color);
}

.card-info .card-header {
    color: var(--info-color);
}

/* === STAT CARDS === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: var(--font-weight-medium);
}

/* === STATUS PANEL === */
.status-panel {
    position: sticky;
    top: calc(var(--navbar-height) + var(--spacing-lg));
    z-index: 100;
}

.status-panel .card-header {
    background: var(--primary-color);
    color: var(--text-white);
    border-bottom: none;
}

.status-panel .card-body {
    background: rgba(102, 126, 234, 0.05);
}

/* === RESPONSIVE CARDS === */
@media (max-width: 768px) {
    .card-header,
    .card-body,
    .card-footer {
        padding: var(--spacing-lg);
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-value {
        font-size: var(--font-size-2xl);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
}

@media (max-width: 576px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* === THEME SPECIFIC STYLES === */
[data-theme="dark"] .card {
    background: rgba(17, 24, 39, 0.95);
    border-color: rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .card-header {
    border-bottom-color: rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .card-footer {
    background: rgba(31, 41, 55, 0.8);
    border-top-color: rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .stat-card {
    background: rgba(17, 24, 39, 0.95);
    border-color: rgba(75, 85, 99, 0.3);
}

/* === ACCESSIBILITY === */
.card:focus-within {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .card,
    .stat-card {
        transition: none;
        transform: none !important;
    }
    
    .card:hover,
    .stat-card:hover {
        transform: none;
    }
}