/* ============================================
   GigaRouen - Styles Principaux
   Thème Clair Professionnel
   ============================================ */

/* Variables CSS */
:root {
    /* Couleurs */
    --color-white: #FFFFFF;
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F8F9FA;
    --color-bg-tertiary: #E9ECEF;
    --color-text-primary: #212529;
    --color-text-secondary: #6C757D;
    --color-text-light: #ADB5BD;
    --color-accent-primary: #2C3E50;
    --color-accent-secondary: #3498DB;
    --color-accent-hover: #1A252F;
    --color-border: #DEE2E6;
    --color-overlay: rgba(0, 0, 0, 0.7);

    /* Typographie */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    /* Autres */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

/* Logo */
.logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

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

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

/* Social Links in Header */
.social-links {
    display: flex;
    gap: var(--spacing-xs);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-accent-secondary);
}

/* Navigation Desktop */
.nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent-secondary);
    transition: var(--transition);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-accent-primary);
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    z-index: 999;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.mobile-nav.active {
    display: flex;
}

.mobile-nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-primary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
    background-color: var(--color-bg-secondary);
    color: var(--color-accent-secondary);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #2C3E50 0%, #3498DB 50%, #2C3E50 100%);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
}

.hero-background::after {
    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="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: var(--spacing-lg);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -2px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-white);
    color: var(--color-accent-primary);
}

.btn-primary:hover {
    background-color: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--color-white);
}

.btn-secondary:hover {
    background-color: var(--color-white);
    border-color: var(--color-white);
    color: var(--color-accent-primary);
    transform: translateY(-2px);
}

.btn-dark {
    background-color: var(--color-accent-primary);
    color: var(--color-white);
    border-color: var(--color-accent-primary);
}

.btn-dark:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* Hero Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background-color: rgba(255, 255, 255, 0.6);
    border-radius: 2px;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(12px); opacity: 0.3; }
}

/* ============================================
   Page Header (for inner pages)
   ============================================ */
.page-header {
    padding-top: calc(var(--header-height) + var(--spacing-xxl));
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, #2C3E50 0%, #3498DB 100%);
    text-align: center;
}

.page-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
}

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

.section-alt {
    background-color: var(--color-bg-secondary);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 600;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ============================================
   About Section (Homepage)
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: var(--spacing-md);
}

.about-text {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-features {
    display: grid;
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

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

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--color-accent-primary);
    color: var(--color-white);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-xs);
}

.feature-text {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

/* ============================================
   Preview Grid (Homepage)
   ============================================ */
.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--spacing-lg);
}

.preview-card {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    aspect-ratio: 16/10;
    cursor: pointer;
}

.preview-card-large {
    grid-row: span 2;
    aspect-ratio: auto;
}

.preview-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    transition: var(--transition);
}

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

.preview-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--color-white);
}

.preview-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-accent-secondary);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.preview-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 500;
}

/* ============================================
   Gallery Tabs
   ============================================ */
.gallery-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--color-accent-primary);
    border-color: var(--color-border);
}

.tab-btn.active {
    color: var(--color-white);
    background-color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

.gallery-content {
    display: none;
}

.gallery-content.active {
    display: block;
}

.gallery-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.gallery-intro h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-sm);
}

.gallery-intro p {
    color: var(--color-text-secondary);
}

/* ============================================
   Gallery
   ============================================ */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

/* Gallery single column (1 photo par ligne) */
.gallery.gallery-single-column {
    grid-template-columns: 1fr;
    max-width: 900px;
    margin: 0 auto;
}

.gallery-item-wide {
    width: 100%;
}

.gallery-item-wide .gallery-item-image {
    aspect-ratio: 21/9;
}

/* Empty gallery state */
.empty-gallery {
    text-align: center;
    padding: 4rem 2rem;
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius-lg);
    color: var(--color-text-secondary);
}

.gallery-item {
    background-color: var(--color-bg-primary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: var(--transition);
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.gallery-item-image {
    position: relative;
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
    background-color: var(--color-bg-tertiary);
}

.gallery-item-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

.gallery-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background-color: var(--color-white);
    border-radius: 50%;
    color: var(--color-accent-primary);
    transform: scale(0.8);
    transition: var(--transition);
}

.gallery-item:hover .gallery-item-icon {
    transform: scale(1);
}

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

.gallery-item-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.gallery-item-meta {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ============================================
   Contact Page
   ============================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
}

.contact-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-md);
}

.contact-text {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    color: var(--color-accent-secondary);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.contact-item p,
.contact-item a {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.contact-item a:hover {
    color: var(--color-accent-secondary);
}

.contact-social h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.social-links-large {
    display: flex;
    gap: var(--spacing-md);
}

.social-link-large {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.25rem;
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.social-link-large:hover {
    background-color: var(--color-accent-primary);
    color: var(--color-white);
}

/* Contact Form */
.contact-form-wrapper {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: var(--font-body);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-white);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-secondary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============================================
   Modal
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    flex-direction: column;
}

.modal.active {
    display: flex;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-white);
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: var(--color-white);
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.modal-content {
    flex: 1;
    position: relative;
    overflow: hidden;
}

#modalContent .viewer {
    width: 100%;
    height: 100%;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-accent-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-giga,
.footer-brand .logo-rouen {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
}

.footer-brand .logo-giga {
    color: var(--color-white);
}

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

.footer-tagline {
    margin-top: var(--spacing-xs);
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.footer-social .social-link {
    color: rgba(255, 255, 255, 0.7);
}

.footer-social .social-link:hover {
    color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.1);
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-nav-title {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.footer-nav a {
    font-size: 0.95rem;
    opacity: 0.7;
    transition: var(--transition);
}

.footer-nav a:hover {
    opacity: 1;
    color: var(--color-accent-secondary);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.875rem;
    opacity: 0.6;
}

.admin-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
    transition: var(--transition);
}

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

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .about-content .section-title {
        text-align: center;
    }

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

    .preview-grid {
        grid-template-columns: 1fr;
    }

    .preview-card-large {
        grid-row: auto;
        aspect-ratio: 16/10;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .social-links {
        display: none;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .gallery-tabs {
        flex-direction: column;
        align-items: stretch;
    }

    .tab-btn {
        justify-content: center;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .footer-social {
        justify-content: center;
    }

    .modal-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .modal-title {
        font-size: 1rem;
    }

    .social-links-large {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .gallery {
        grid-template-columns: 1fr;
    }

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

    .contact-form-wrapper {
        padding: var(--spacing-md);
    }
}

/* ============================================
   Utilities
   ============================================ */
.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;
}

/* Loading state for gallery items */
.gallery-item-image.loading {
    background: linear-gradient(90deg,
        var(--color-bg-tertiary) 25%,
        var(--color-bg-secondary) 50%,
        var(--color-bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}