/* ================================================
   Admin Images - Modern Design System
   ================================================ */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --success-color: #10b981;
    --success-hover: #059669;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --warning-color: #f59e0b;
    --warning-hover: #d97706;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --white: #ffffff;
    --black: #000000;
    
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Typography */
body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
}

/* Main Content Layout */
.admin-main-content {
    min-height: 100vh;
    background: var(--gray-50);
    padding-top: 80px;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--white);
    padding: 3rem 0;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>') repeat;
    opacity: 0.3;
    pointer-events: none;
}

.page-header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.back-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.back-link svg {
    transition: var(--transition);
}

.back-link:hover svg {
    transform: translateX(-2px);
}

.page-title-section {
    text-align: center;
    margin-top: 1rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.page-description {
    font-size: 1.125rem;
    opacity: 0.9;
    margin: 0;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Content Container */
.content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Images Section */
.images-section {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-title svg {
    color: var(--primary-color);
    width: 24px;
    height: 24px;
}

.section-title h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

.section-stats {
    display: flex;
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.stat-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-500);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 2rem;
}

/* Images Grid Container */
.images-grid-container {
    padding: 2rem;
}

.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    min-height: 200px;
}

/* Loading State */
.loading-placeholder {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-placeholder p {
    color: var(--gray-500);
    font-size: 1.125rem;
    margin: 0;
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    color: var(--gray-300);
}

.empty-state h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-700);
    margin: 0 0 0.5rem 0;
}

.empty-state p {
    color: var(--gray-500);
    font-size: 1rem;
    margin: 0;
}

/* Image Cards */
.image-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
    cursor: pointer;
}

.image-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--gray-300);
}

.image-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    opacity: 0;
    transition: var(--transition);
}

.image-card:hover::before {
    opacity: 1;
}

.image-preview {
    position: relative;
    height: 200px;
    background: var(--gray-50);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.image-card:hover .image-preview img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 1rem;
}

.image-card:hover .image-overlay {
    opacity: 1;
}

.image-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.image-card:hover .image-actions {
    opacity: 1;
    transform: translateY(0);
}

.image-info {
    padding: 1.5rem;
}

.image-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
    word-break: break-word;
}

.image-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.image-meta svg {
    width: 16px;
    height: 16px;
}

.image-size {
    color: var(--gray-400);
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-width: 100px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-danger {
    background: var(--danger-color);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.btn-danger:hover:not(:disabled) {
    background: var(--danger-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-danger:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.delete-btn {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.delete-btn:hover:not(:disabled) {
    background: var(--danger-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.delete-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

.image-card {
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-card.removing {
    animation: fadeOut 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-header {
        padding: 2rem 0;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .page-description {
        font-size: 1rem;
    }
    
    .content-container {
        padding: 1rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1.5rem;
    }
    
    .section-stats {
        align-self: stretch;
        justify-content: space-around;
    }
    
    .images-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .images-grid-container {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .images-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header-content {
        padding: 0 1rem;
    }
    
    .back-link {
        margin-bottom: 1rem;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .image-card {
        border-width: 2px;
    }
    
    .btn {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}