/* Wedding2 - Mobile-First Styles */

/* CSS Variables - Design System */
:root {
    /* Primary Colors */
    --primary-color: #6366f1;
    --primary-light: #e0e7ff;
    --primary-dark: #4338ca;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    /* Secondary Colors */
    --secondary-color: #ec4899;
    --secondary-light: #fce7f3;
    --secondary-dark: #be185d;
    --secondary-gradient: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
    
    /* Wedding Theme Colors */
    --wedding-primary: #f7e7e6;
    --wedding-secondary: #d4af37;
    --wedding-accent: #9caf88;
    --wedding-neutral: #f8fafc;
    --wedding-dark: #1e293b;
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-light: #f8fafc;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    
    /* Border Colors */
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --border-dark: #94a3b8;
    
    /* Semantic Colors */
    --success-color: #10b981;
    --success-light: #d1fae5;
    --success-dark: #047857;
    
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --warning-dark: #b45309;
    
    --error-color: #ef4444;
    --error-light: #fee2e2;
    --error-dark: #b91c1c;
    
    --info-color: #3b82f6;
    --info-light: #dbeafe;
    --info-dark: #1d4ed8;
    
    /* Gallery Colors */
    --gallery-bg: #ffffff;
    --gallery-card: #f8fafc;
    --gallery-overlay: rgba(0, 0, 0, 0.6);
    --gallery-hover: rgba(99, 102, 241, 0.9);
    --gallery-text: #ffffff;
    --gallery-meta: rgba(255, 255, 255, 0.9);
    
    /* iOS Colors */
    --ios-blue: #007aff;
    --ios-gray: #8e8e93;
    --ios-separator: #c6c6c8;
    --ios-background: #f2f2f7;
    
    /* Material Colors */
    --material-primary: #6200ee;
    --material-secondary: #03dac6;
    --material-background: #ffffff;
    --material-surface: #f5f5f5;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    
    /* Typography */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 1.875rem;
    --font-4xl: 2.25rem;
    --font-5xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #1c1c1e;
        --bg-tertiary: #2c2c2e;
        --text-primary: #ffffff;
        --text-secondary: #ebebf5;
        --text-muted: #98989d;
        --border-light: #38383a;
        --border-medium: #48484a;
        --gallery-bg: #1c1c1e;
        --gallery-card: #2c2c2e;
    }
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: var(--font-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Mobile Header */
.mobile-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--ios-separator);
    padding: 12px 16px;
    padding-top: max(12px, env(safe-area-inset-top));
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.header-left .logo {
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo-text {
    color: var(--text-primary);
}

.logo-accent {
    color: var(--secondary-color);
}

.header-right {
    display: flex;
    gap: 8px;
}

.header-action {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.header-action:active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.header-action.btn-primary {
    background: var(--primary-gradient);
    color: white;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 56px - 60px); /* Header + Bottom Nav */
    padding-bottom: 60px; /* Space for bottom nav */
}

/* Sections */
.section {
    padding: var(--space-6) 0;
}

.section-header {
    text-align: center;
    padding: var(--space-8) var(--space-4);
}

.page-title {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.page-subtitle {
    font-size: var(--font-base);
    color: var(--text-secondary);
}

.section-title {
    font-size: var(--font-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    text-align: center;
}

/* Hero Section */
.hero-section {
    background: var(--primary-gradient);
    color: white;
    padding: var(--space-12) var(--space-4);
    text-align: center;
}

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

.hero-title {
    font-size: var(--font-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: var(--font-lg);
    opacity: 0.9;
    margin-bottom: var(--space-6);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.75rem 1.5rem;
    font-size: var(--font-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.95);
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--secondary-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(236, 72, 153, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(236, 72, 153, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-light);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-lg);
}

.btn-block {
    width: 100%;
}

/* Photo Grid */
.photo-grid-mobile {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    padding: 2px;
}

.photo-grid-item {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
}

.photo-card {
    display: block;
    text-decoration: none;
    color: inherit;
}

.photo-card-image {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.photo-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.photo-card:active .photo-card-image img {
    transform: scale(0.95);
}

.photo-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: var(--gallery-text);
}

.photo-card-title {
    font-size: var(--font-sm);
    font-weight: 600;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.photo-card-meta {
    font-size: var(--font-xs);
    color: var(--gallery-meta);
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Features Section */
.section-features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.feature-card {
    text-align: center;
    padding: var(--space-6);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--space-3);
}

.feature-card h3 {
    font-size: var(--font-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

/* CTA Section */
.section-cta {
    background: var(--wedding-primary);
    text-align: center;
    padding: var(--space-12) var(--space-4);
}

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

.cta-content h2 {
    font-size: var(--font-3xl);
    font-weight: 700;
    margin-bottom: var(--space-3);
    color: var(--wedding-dark);
}

.cta-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

/* Empty State */
.section-empty {
    padding: var(--space-12) var(--space-4);
}

.empty-state {
    text-align: center;
    padding: var(--space-8) var(--space-4);
}

.empty-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--space-4);
}

.empty-state h2 {
    font-size: var(--font-2xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--bg-primary);
    border-top: 1px solid var(--ios-separator);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0 1rem;
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    color: var(--ios-gray);
    text-decoration: none;
    font-size: 0.75rem;
    transition: color var(--transition-fast);
}

.bottom-nav-item.active {
    color: var(--primary-color);
}

.bottom-nav-icon {
    font-size: 1.25rem;
    margin-bottom: 2px;
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 80px;
    right: 16px;
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: 1001;
}

.fab:active {
    transform: scale(0.95);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 16px;
    font-size: 1rem;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    -webkit-appearance: none;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Auth Forms */
.section-auth {
    padding: var(--space-8) var(--space-4);
    min-height: calc(100vh - 56px);
    display: flex;
    align-items: center;
}

.auth-container {
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
    padding: 0 var(--space-4);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.auth-title {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.auth-subtitle {
    font-size: var(--font-base);
    color: var(--text-secondary);
}

.auth-form {
    margin-top: var(--space-6);
}

.form-group-checkbox {
    margin-bottom: var(--space-4);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
}

.form-actions {
    margin-top: var(--space-6);
}

.auth-footer {
    margin-top: var(--space-6);
    text-align: center;
    font-size: var(--font-sm);
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Upload Section */
.section-upload {
    padding: var(--space-6) var(--space-4);
}

.upload-form {
    max-width: 600px;
    margin: 0 auto;
}

.upload-area {
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    text-align: center;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.upload-content {
    pointer-events: none;
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--space-4);
}

.upload-info {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin: var(--space-1) 0;
}

.upload-input {
    display: none;
}

.upload-preview {
    margin-top: var(--space-6);
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--space-2);
}

.preview-item {
    position: relative;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-actions {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.upload-guidelines {
    margin-top: var(--space-8);
    padding: var(--space-6);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.upload-guidelines h3 {
    font-size: var(--font-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
}

.upload-guidelines ul {
    list-style: none;
    padding-left: 0;
}

.upload-guidelines li {
    padding: var(--space-2) 0;
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

.upload-guidelines li::before {
    content: "•";
    color: var(--primary-color);
    margin-right: 8px;
}

/* Photo Detail */
.back-nav {
    padding: var(--space-4) var(--space-4);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-sm);
}

.section-photo-detail {
    padding: var(--space-6) var(--space-4);
}

.photo-display {
    margin-bottom: var(--space-6);
}

.photo-main {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-secondary);
}

.photo-image {
    width: 100%;
    height: auto;
    display: block;
}

.photo-actions {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
    margin-top: var(--space-4);
}

.action-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 1px solid var(--border-medium);
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.action-btn:active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.photo-info {
    padding: var(--space-6) 0;
}

.photo-title {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.photo-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.photo-rating {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.rating-stars {
    display: flex;
    gap: 2px;
}

.rating-stars i {
    color: var(--border-medium);
}

.rating-stars i.active {
    color: #fbbf24;
}

.rating-count {
    color: var(--text-muted);
    font-size: var(--font-sm);
}

/* Comments Section */
.section-comments {
    padding: var(--space-6) var(--space-4);
}

.comment-form {
    margin-bottom: var(--space-6);
}

.comment-form textarea {
    min-height: 100px;
    resize: vertical;
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.comment-item {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.comment-avatar {
    flex-shrink: 0;
}

.comment-avatar img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-lg);
}

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-date {
    font-size: var(--font-xs);
    color: var(--text-muted);
}

.comment-text {
    color: var(--text-primary);
    line-height: 1.6;
}

.no-comments {
    text-align: center;
    padding: var(--space-4);
    color: var(--text-secondary);
}

/* Filter Bar */
.section-filters {
    padding: var(--space-4) var(--space-4);
    background: var(--bg-secondary);
}

.filter-bar {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.filter-select {
    width: 100%;
    padding: 12px;
    font-size: 1rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-6);
}

.pagination-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-medium);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.pagination-link:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.pagination-item {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-weight: 600;
}

.pagination-item.active {
    background: var(--primary-color);
    color: white;
}

.gallery-info {
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-sm);
    margin-top: var(--space-4);
}

/* Flash Messages */
.flash-message {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 2000;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.flash-success {
    background: var(--success-color);
    color: white;
}

.flash-error {
    background: var(--error-color);
    color: white;
}

.flash-info {
    background: var(--info-color);
    color: white;
}

.flash-close {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.8;
}

.flash-close:hover {
    opacity: 1;
}

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.alert-error {
    background: var(--error-light);
    color: var(--error-dark);
    border: 1px solid var(--error-color);
}

.alert-success {
    background: var(--success-light);
    color: var(--success-dark);
    border: 1px solid var(--success-color);
}

/* Auth Required */
.auth-required {
    text-align: center;
    padding: var(--space-4);
    color: var(--text-secondary);
}

/* Responsive Design */
@media (min-width: 576px) {
    .photo-grid-mobile {
        grid-template-columns: repeat(3, 1fr);
        gap: 4px;
        padding: 4px;
    }
    
    .hero-title {
        font-size: var(--font-5xl);
    }
    
    .section {
        padding: var(--space-8) 0;
    }
}

@media (min-width: 768px) {
    .photo-grid-mobile {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
        padding: 8px;
    }
    
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .auth-container {
        max-width: 500px;
    }
}

@media (min-width: 992px) {
    .photo-grid-mobile {
        grid-template-columns: repeat(5, 1fr);
        gap: 12px;
        padding: 12px;
    }
    
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .main-content {
        padding-bottom: 0; /* No bottom nav on desktop */
    }
    
    .bottom-nav {
        display: none; /* Hide bottom nav on desktop */
    }
    
    .fab {
        bottom: 24px;
        right: 24px;
    }
}

@media (min-width: 1200px) {
    .photo-grid-mobile {
        grid-template-columns: repeat(6, 1fr);
        gap: 16px;
        padding: 16px;
    }
}

/* Accessibility */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High Contrast */
@media (prefers-contrast: high) {
    :root {
        --border-light: #000000;
        --border-medium: #000000;
        --text-secondary: #000000;
    }
}

/* Print Styles */
@media print {
    .bottom-nav,
    .fab,
    .header-actions {
        display: none;
    }

    .main-content {
        padding-bottom: 0;
    }
}

/* How It Works Section */
.section-how-it-works {
    padding: var(--space-12) var(--space-4);
    background: var(--bg-secondary);
}

.section-how-it-works .section-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    font-size: var(--font-lg);
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.step-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    text-align: center;
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.step-number {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-lg);
}

.step-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--space-4);
}

.step-card h3 {
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.step-card p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
    line-height: 1.6;
}

.privacy-notice {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--success-light);
    border-radius: var(--border-radius-md);
    color: var(--success-dark);
    font-size: var(--font-sm);
}

.privacy-notice i {
    font-size: 1.25rem;
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.desktop-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.nav-left .logo {
    font-size: var(--font-2xl);
    font-weight: 700;
    text-decoration: none;
}

.nav-center {
    display: flex;
    gap: var(--space-6);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-sm);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--border-radius-sm);
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

.nav-link.active {
    color: var(--primary-color);
    background: var(--primary-light);
}

.nav-link.nav-action {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-link.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-light);
}

.nav-link.btn-primary:hover {
    background: var(--primary-dark);
    color: var(--text-light);
}

.nav-right {
    display: flex;
    gap: var(--space-3);
}

/* About Section */
.section-about {
    padding: var(--space-12) var(--space-4);
}

.about-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.page-title {
    font-size: var(--font-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.page-subtitle {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.about-content > div {
    margin-bottom: var(--space-12);
}

.about-content h2 {
    font-size: var(--font-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.about-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-3);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.value-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    text-align: center;
}

.value-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--space-4);
}

.value-card h3 {
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.value-card p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

.features-list {
    list-style: none;
    padding: 0;
}

.features-list li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    color: var(--text-secondary);
}

.features-list i {
    color: var(--success-color);
    font-size: 1.25rem;
}

.about-cta {
    text-align: center;
    padding: var(--space-8);
    background: var(--primary-light);
    border-radius: var(--border-radius-lg);
}

.about-cta h2 {
    margin-bottom: var(--space-3);
}

.about-cta p {
    margin-bottom: var(--space-6);
}

/* Help Section */
.section-help {
    padding: var(--space-12) var(--space-4);
}

.help-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.help-section {
    margin-bottom: var(--space-12);
}

.help-section h2 {
    font-size: var(--font-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.faq-item {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
}

.faq-question {
    font-size: var(--font-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    cursor: pointer;
}

.faq-answer {
    color: var(--text-secondary);
    line-height: 1.8;
}

.steps-guide {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.step-guide-item {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
}

.step-guide-number {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    color: var(--text-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-lg);
    flex-shrink: 0;
}

.step-guide-content h3 {
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.step-guide-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.contact-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.contact-option {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    text-align: center;
}

.contact-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--space-4);
}

.contact-option h3 {
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.contact-option p {
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.contact-note {
    font-size: var(--font-sm);
    color: var(--text-muted);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.tip-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    text-align: center;
}

.tip-icon {
    font-size: 2rem;
    color: var(--warning-color);
    margin-bottom: var(--space-4);
}

.tip-card h3 {
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.tip-card p {
    color: var(--text-secondary);
    font-size: var(--font-sm);
    line-height: 1.6;
}

/* Desktop Responsive */
@media (min-width: 768px) {
    .desktop-nav {
        display: block;
    }

    .mobile-header {
        display: none;
    }

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

    .section-how-it-works,
    .section-about,
    .section-help {
        padding: var(--space-16) var(--space-8);
    }

    .page-title {
        font-size: var(--font-5xl);
    }

    .faq-list {
        gap: var(--space-6);
    }

    .steps-guide {
        gap: var(--space-8);
    }
}