/* Layout CSS - Grid system, header, footer, and responsive layout */

/* Container */
.container {
    max-width: 1920px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    width: 100%;
}

/* Header */
header {
    margin-bottom: var(--spacing-2xl);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.header-text {
    text-align: left;
}

.header-text h1 {
    font-size: var(--font-4xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-text p {
    font-size: var(--font-lg);
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-status {
    color: var(--color-success);
    font-weight: var(--font-semibold);
    font-size: 0.9rem;
    display: inline; /* Always visible when not on login screen */
}

#logoutBtn {
    display: inline-block; /* Always visible when not on login screen */
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
}

/* Sessions View */
.sessions-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.sessions-header h2 {
    font-size: var(--font-3xl);
    color: var(--text-primary);
    margin: 0;
}

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

/* Session Detail View */
.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.session-header h2 {
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.session-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.session-stats {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.stat-item {
    text-align: center;
}

.stat-item .value {
    font-size: var(--font-3xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    display: block;
}

.stat-item .label {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-top: var(--spacing-xs);
}

/* Images Grid - Optimized for large screens only */
.images-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Footer */
footer {
    text-align: center;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-primary);
}

footer p {
    color: var(--text-muted);
    font-size: var(--font-sm);
}

/* Status Display */
#status {
    color: var(--color-success);
    font-weight: var(--font-semibold);
}

/* Responsive Grid System */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

.grid-cols-5 {
    grid-template-columns: repeat(5, 1fr);
}

.grid-cols-6 {
    grid-template-columns: repeat(6, 1fr);
}

/* Large screen optimized - no mobile breakpoints needed */

/* Large screen optimized - 5 columns always */

/* Print styles */
@media print {
    .container {
        max-width: none;
        padding: 0;
    }
    
    .btn, .session-actions, .upload-zone, .modal {
        display: none !important;
    }
    
    .images-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .session-card, .image-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    header h1 {
        -webkit-text-fill-color: initial;
        color: var(--text-primary);
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .result-image {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .images-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .session-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Portrait orientation on mobile */
@media (max-width: 768px) and (orientation: portrait) {
    .images-grid {
        grid-template-columns: 1fr;
    }
    
    .session-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Focus management for accessibility */
.focus-trap {
    position: relative;
}

.focus-trap::before,
.focus-trap::after {
    content: '';
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

/* Skip links for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: var(--text-primary);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Screen reader only content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}