/* Apple-Inspired Photo Gallery Styles */

/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Apple Color Palette */
    --color-primary: #FFFFFF;
    --color-secondary: #F5F5F7;
    --color-accent: #007AFF;
    --color-text-primary: #1D1D1F;
    --color-text-secondary: #86868B;
    --color-border: #E5E5E7;
    --color-success: #30D158;
    --color-error: #FF3B30;
    --color-warning: #FF9500;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.25s ease-out;
    --transition-slow: 0.35s ease-out;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text-primary);
}

.nav-logo {
    font-size: 24px;
}

.nav-logo-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.nav-title {
    font-size: 20px;
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.02em;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-accent);
}

/* Main Layout */
.main-section {
    min-height: calc(100vh - 60px);
}

.main-section.hidden {
    display: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #F5F5F7 0%, #FFFFFF 100%);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-regular);
    margin-bottom: var(--spacing-xl);
}

/* Sections */
.section {
    padding: var(--spacing-3xl) 0;
}

.collections-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-secondary);
}

.section-title {
    font-size: 32px;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

/* Collections Grid */
.collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.collection-card {
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid var(--color-border);
}

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

.collection-preview {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

.collection-placeholder {
    font-size: 48px;
    color: var(--color-text-secondary);
}

.collection-info {
    padding: var(--spacing-lg);
}

.collection-name {
    font-size: 20px;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.collection-count {
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: var(--font-weight-medium);
}

/* Photos Grid */
.photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.photo-item {
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid var(--color-border);
}

.photo-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.photo-item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.photo-item:hover img {
    transform: scale(1.02);
}

.photo-info {
    padding: var(--spacing-md);
}

.photo-name {
    font-size: 14px;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Collection Header */
.collection-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
}

.back-btn {
    background: var(--color-secondary);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.back-btn:hover {
    background: var(--color-border);
    transform: translateX(-2px);
}

.collection-title {
    font-size: 36px;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
}

.modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(0, 0, 0, 0.5);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: white;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.7);
    transform: scale(1.1);
}

.modal img {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
}

.modal-actions {
    padding: var(--spacing-lg);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    background: var(--color-secondary);
}

.modal-btn {
    background: var(--color-accent);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-btn:hover {
    background: #0056CC;
    transform: translateY(-1px);
}

/* Admin Styles */
.admin-section {
    background: var(--color-primary);
    min-height: calc(100vh - 60px);
}

.admin-header {
    background: var(--color-secondary);
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.admin-title {
    font-size: 36px;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    text-align: center;
}

.admin-content {
    padding: var(--spacing-xl) 0;
}

.admin-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.btn {
    background: var(--color-accent);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn:hover {
    background: #0056CC;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--color-secondary);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background: var(--color-border);
}

.btn-danger {
    background: var(--color-error);
}

.btn-danger:hover {
    background: #CC0000;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3xl);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    transition: all var(--transition-normal);
    background: var(--color-secondary);
}

.upload-area.dragover {
    border-color: var(--color-accent);
    background: rgba(0, 122, 255, 0.05);
}

.upload-icon {
    font-size: 48px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.upload-text {
    font-size: 18px;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-sm);
}

.upload-subtext {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.file-input {
    display: none;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-xs);
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 16px;
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 16px;
    background: white;
    cursor: pointer;
}

/* Login Form */
.login-container {
    max-width: 400px;
    margin: var(--spacing-3xl) auto;
    padding: var(--spacing-xl);
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.login-title {
    font-size: 24px;
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* Alerts */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-medium);
}

.alert-success {
    background: rgba(48, 209, 88, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(48, 209, 88, 0.2);
}

.alert-error {
    background: rgba(255, 59, 48, 0.1);
    color: var(--color-error);
    border: 1px solid rgba(255, 59, 48, 0.2);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--color-text-secondary);
}

.empty-state h3 {
    font-size: 24px;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.empty-state p {
    font-size: 16px;
    max-width: 400px;
    margin: 0 auto;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

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

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .collections-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .photos-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
    
    .collection-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .collection-title {
        font-size: 28px;
    }
    
    .modal-content {
        max-width: 95vw;
        max-height: 95vh;
    }
    
    .admin-actions {
        flex-direction: column;
    }
    
    .upload-area {
        padding: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .photos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}