/* ==========================================================================
   Card Component - ITCSS Layer 4 (Components)
   ========================================================================== */

/* Base card styles */
.card {
    background-color: var(--sys-color-background-surface);
    border: var(--border-width-sm) solid var(--sys-color-border-subtle);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-speed-normal) var(--transition-easing);
    position: relative;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* Card variants */
.card-elevated {
    background-color: var(--sys-color-background-elevated);
    box-shadow: var(--shadow-lg);
}

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

.card-flat {
    box-shadow: none;
    border: var(--border-width-md) solid var(--sys-color-border-default);
}

.card-flat:hover {
    border-color: var(--sys-color-border-default);
    box-shadow: var(--shadow-xs);
    transform: none;
}

/* Interactive card */
.card-interactive {
    cursor: pointer;
    user-select: none;
}

.card-interactive:focus-visible {
    outline: 2px solid var(--sys-color-interactive);
    outline-offset: 2px;
}

.card-interactive:active {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
}

/* Card header */
.card-header {
    padding: var(--spacing-lg);
    border-bottom: var(--border-width-sm) solid var(--sys-color-divider-default);
    background-color: var(--sys-color-background-surface);
}

.card-header:last-child {
    border-bottom: none;
}

.card-header-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--sys-color-heading);
    margin: 0;
    line-height: var(--line-height-tight);
}

.card-header-subtitle {
    font-size: var(--font-size-sm);
    color: var(--sys-color-text-secondary);
    margin: var(--spacing-xs) 0 0 0;
    line-height: var(--line-height-normal);
}

.card-header-actions {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
    margin-left: auto;
}

.card-header-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

/* Card body */
.card-body {
    padding: var(--spacing-lg);
    color: var(--sys-color-text-primary);
    line-height: var(--line-height-normal);
}

.card-body p:last-child {
    margin-bottom: 0;
}

/* Card footer */
.card-footer {
    padding: var(--spacing-lg);
    border-top: var(--border-width-sm) solid var(--sys-color-divider-default);
    background-color: var(--sys-color-background-surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.card-footer:first-child {
    border-top: none;
}

/* Card media */
.card-media {
    width: 100%;
    height: auto;
    display: block;
}

.card-media-container {
    position: relative;
    overflow: hidden;
}

.card-media-16-9 {
    aspect-ratio: 16 / 9;
}

.card-media-4-3 {
    aspect-ratio: 4 / 3;
}

.card-media-1-1 {
    aspect-ratio: 1 / 1;
}

.card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Card sizes */
.card-sm {
    border-radius: var(--border-radius-md);
}

.card-sm .card-header,
.card-sm .card-body,
.card-sm .card-footer {
    padding: var(--spacing-md);
}

.card-lg .card-header,
.card-lg .card-body,
.card-lg .card-footer {
    padding: var(--spacing-xl);
}

/* Card layouts */
.card-horizontal {
    display: flex;
    align-items: stretch;
}

.card-horizontal .card-media-container {
    flex: 0 0 200px;
}

.card-horizontal .card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-horizontal .card-body {
    flex: 1;
}

/* Card grid */
.card-grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.card-grid-sm {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.card-grid-lg {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

/* Status cards */
.card-success {
    border-left: var(--border-width-lg) solid var(--sys-color-status-success);
}

.card-error {
    border-left: var(--border-width-lg) solid var(--sys-color-status-error);
}

.card-warning {
    border-left: var(--border-width-lg) solid var(--sys-color-status-warning);
}

.card-info {
    border-left: var(--border-width-lg) solid var(--sys-color-status-info);
}

/* Loading state */
.card-loading {
    position: relative;
    overflow: hidden;
}

.card-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        color-mix(in srgb, var(--sys-color-background-surface) 50%, var(--sys-color-border-subtle)),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .card-horizontal {
        flex-direction: column;
    }
    
    .card-horizontal .card-media-container {
        flex: none;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .card-header,
    .card-body,
    .card-footer {
        padding: var(--spacing-md);
    }
    
    .card-lg .card-header,
    .card-lg .card-body,
    .card-lg .card-footer {
        padding: var(--spacing-lg);
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    .card,
    .card-elevated,
    .card-interactive {
        transition: none;
    }
    
    .card:hover,
    .card-elevated:hover {
        transform: none;
    }
    
    .card-loading::after {
        animation: none;
    }
}