/* ========================================
   十八在海外 - Global Lifestyle Research
   Nordic Minimalist Design System
   ======================================== */

/* CSS Variables */
:root {
    /* Colors - Nordic Minimalist */
    --color-bg: #FAF9F7;
    --color-bg-alt: #F5F4F0;
    --color-text: #2C2C2C;
    --color-text-light: #6B6B6B;
    --color-text-muted: #9B9B9B;
    --color-primary: #2C5282;
    --color-primary-light: #4A7FB5;
    --color-accent: #C4956A;
    --color-accent-light: #D4B08A;
    --color-border: #E8E6E1;
    --color-white: #FFFFFF;
    --color-success: #48BB78;
    --color-error: #E53E3E;
    
    /* Typography */
    --font-serif: 'Noto Serif SC', Georgia, serif;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

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

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

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: background var(--transition-base), box-shadow var(--transition-base);
    padding: 1.25rem 0;
}

.navbar.scrolled {
    background: rgba(250, 249, 247, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 0.875rem 0;
}

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

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

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

.nav-cta {
    background: var(--color-text);
    color: var(--color-white) !important;
    padding: 0.625rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--color-primary);
    transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--color-text);
    transition: all var(--transition-base);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1.5px solid transparent;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--space-xl)) 0 var(--space-2xl);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-eyebrow {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.hero-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 400;
    color: var(--color-text-light);
    line-height: 1.5;
    margin-bottom: var(--space-md);
    font-family: var(--font-serif);
}

.hero-description {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    max-width: 480px;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image-placeholder {
    aspect-ratio: 4/5;
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #E8E4DE 100%);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    gap: var(--space-xs);
}

.hero-image-placeholder small {
    font-size: 0.75rem;
    opacity: 0.7;
}

/* ========================================
   Philosophy Section
   ======================================== */
.philosophy {
    padding: var(--space-3xl) 0;
    background: var(--color-white);
}

.philosophy-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.philosophy-text {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-primary);
    font-family: var(--font-serif);
    margin-bottom: var(--space-md);
}

.philosophy-body {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========================================
   Countries Preview
   ======================================== */
.countries-preview {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    margin-top: -var(--space-sm);
    margin-bottom: var(--space-xl);
}

.countries-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.country-card {
    background: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.country-card.featured {
    grid-column: span 1;
}

.country-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #E8E4DE 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.country-info {
    padding: var(--space-md);
}

.country-status {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(44, 82, 130, 0.08);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    margin-bottom: var(--space-xs);
}

.country-info h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.country-info p {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
    line-height: 1.6;
}

.link-arrow {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.link-arrow::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.link-arrow:hover::after {
    transform: translateX(4px);
}

/* ========================================
   Content Categories
   ======================================== */
.content-categories {
    padding: var(--space-3xl) 0;
    background: var(--color-white);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.category-card {
    background: var(--color-bg);
    border-radius: 8px;
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid var(--color-border);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    display: block;
}

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.category-card p {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-alt);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta-content h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    margin-bottom: var(--space-md);
}

.cta-content p {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
    padding: calc(80px + var(--space-2xl)) 0 var(--space-xl);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    text-align: center;
}

.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-sm);
}

.page-header p {
    font-size: 1.125rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Content Section
   ======================================== */
.content-section {
    padding: var(--space-2xl) 0;
    background: var(--color-white);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.content-card {
    background: var(--color-bg);
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid var(--color-border);
}

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

.content-card .content-image {
    aspect-ratio: 16/9;
}

.content-body {
    padding: var(--space-md);
}

.content-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(44, 82, 130, 0.08);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    margin-bottom: var(--space-xs);
}

.content-body h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.content-body p {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

/* ========================================
   Countries Detail
   ======================================== */
.countries-detail {
    padding: var(--space-2xl) 0;
    background: var(--color-white);
}

.country-detail {
    margin-bottom: var(--space-3xl);
}

.country-detail:last-child {
    margin-bottom: 0;
}

.country-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.country-header h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.375rem 1rem;
    border-radius: 100px;
}

.badge-active {
    color: var(--color-success);
    background: rgba(72, 187, 120, 0.1);
}

.badge-research {
    color: var(--color-primary);
    background: rgba(44, 82, 130, 0.08);
}

.country-intro {
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-bg);
    border-radius: 8px;
    border-left: 3px solid var(--color-primary);
}

.lead {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.8;
    font-family: var(--font-serif);
}

.dimensions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.dimension-card {
    padding: var(--space-md);
    background: var(--color-bg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-fast);
}

.dimension-card:hover {
    border-color: var(--color-primary);
}

.dimension-card h4 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
}

.dimension-card p {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

.dimension-card a {
    font-size: 0.875rem;
    color: var(--color-primary);
    font-weight: 500;
}

/* ========================================
   Philosophy Box
   ======================================== */
.philosophy-box {
    background: var(--color-bg);
    border-radius: 8px;
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    text-align: center;
    border: 1px solid var(--color-border);
}

.philosophy-box h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.philosophy-box p {
    color: var(--color-text-light);
    margin-bottom: var(--space-xs);
}

/* ========================================
   About Section
   ======================================== */
.about-section {
    padding: var(--space-2xl) 0;
    background: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-image .image-placeholder {
    aspect-ratio: 3/4;
    border-radius: 8px;
}

.about-content h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--space-lg);
}

.about-text {
    margin-bottom: var(--space-xl);
}

.about-text p {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
}

.about-story {
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--color-bg);
    border-radius: 8px;
}

.about-story h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.about-story p {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
}

.about-values {
    margin-bottom: var(--space-xl);
}

.about-values h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
}

.about-values ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.about-values li {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    padding-left: 1.5rem;
    position: relative;
}

.about-values li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 600;
}

/* ========================================
   Contact Section
   ======================================== */
.contact-section {
    padding: var(--space-2xl) 0;
    background: var(--color-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact-info h2 {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    margin-bottom: var(--space-xl);
    line-height: 1.5;
}

.contact-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.feature {
    display: flex;
    gap: var(--space-md);
}

.feature-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.feature p {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-bg);
    border-radius: 8px;
    padding: var(--space-xl);
    border: 1px solid var(--color-border);
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    border: 1.5px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-white);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B6B6B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

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

/* Form Messages */
.form-message {
    padding: var(--space-sm) var(--space-md);
    border-radius: 6px;
    margin-bottom: var(--space-md);
    font-size: 0.9375rem;
}

.form-message-success {
    background: rgba(72, 187, 120, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(72, 187, 120, 0.2);
}

.form-message-error {
    background: rgba(229, 62, 62, 0.1);
    color: var(--color-error);
    border: 1px solid rgba(229, 62, 62, 0.2);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-text);
    color: var(--color-white);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-brand h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
    color: var(--color-white);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    color: rgba(255, 255, 255, 0.8);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.625rem;
}

.footer-links a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-contact p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-sm);
}

.footer-cta {
    display: inline-block;
    padding: 0.625rem 1.5rem;
    background: var(--color-white);
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.footer-cta:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   Animations
   ======================================== */
.fade-in-ready {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .hero-container {
        gap: var(--space-xl);
    }
    
    .countries-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .country-card.featured {
        grid-column: span 2;
    }
    
    .dimensions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --space-3xl: 4rem;
        --space-2xl: 3rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        padding: calc(80px + var(--space-lg)) var(--space-lg) var(--space-lg);
        gap: var(--space-md);
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-base);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 1.125rem;
        padding: 0.5rem 0;
    }
    
    .nav-cta {
        margin-top: var(--space-sm);
        text-align: center;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .countries-grid,
    .categories-grid,
    .content-grid,
    .dimensions-grid {
        grid-template-columns: 1fr;
    }
    
    .country-card.featured {
        grid-column: span 1;
    }
    
    .about-values ul {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        text-align: center;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info h2 {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.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;
}