/**
 * The Canadian Scottish Regimental Heritage Foundation
 * Main Stylesheet
 */

/* ===== CSS Custom Properties (Design Tokens) ===== */
:root {
    /* Primary Colors */
    --color-navy: #1a2744;
    --color-navy-dark: #0f1825;
    --color-navy-light: #2a3a5c;
    --color-gold: #c9a227;
    --color-gold-light: #dbb94a;
    --color-gold-dark: #a88620;
    
    /* Accent Colors (Scottish Tartan) */
    --color-tartan-green: #2d5016;
    --color-tartan-red: #8b2332;
    --color-tartan-blue: #1a4480;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-light-gray: #e9ecef;
    --color-medium-gray: #6c757d;
    --color-dark-gray: #343a40;
    --color-black: #212529;
    
    /* Gradients */
    --gradient-navy: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%);
    --gradient-gold: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-light) 100%);
    --gradient-hero: linear-gradient(180deg, rgba(26, 39, 68, 0.85) 0%, rgba(15, 24, 37, 0.95) 100%);
    
    /* Typography */
    --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1400px;
    
    /* Header Height */
    --header-height: 80px;
    --header-height-scrolled: 70px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-dark-gray);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.menu-open {
    overflow: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-navy);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--spacing-md);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: var(--spacing-md);
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--gradient-gold);
    border-radius: var(--radius-full);
}

.section-title p {
    color: var(--color-medium-gray);
    font-size: var(--text-lg);
    max-width: 600px;
    margin: var(--spacing-md) auto 0;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--color-navy-dark);
    box-shadow: var(--shadow-md);
}

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

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

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

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

.btn-outline:hover {
    background: var(--color-navy);
    color: var(--color-white);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--text-lg);
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-white);
    height: var(--header-height);
    transition: all var(--transition-base);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

.site-header.hidden {
    transform: translateY(-100%);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-icon {
    width: 50px;
    height: 50px;
    color: var(--color-gold);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-navy);
    line-height: 1.1;
}

.logo-subtitle {
    font-size: var(--text-sm);
    color: var(--color-medium-gray);
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

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

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-dark-gray);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.nav-link.active {
    color: var(--color-gold-dark);
}

.nav-link-donate {
    background: var(--gradient-gold);
    color: var(--color-navy-dark) !important;
    margin-left: var(--spacing-sm);
}

.nav-link-donate:hover {
    background: var(--color-gold-light);
    transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 30px;
    height: 30px;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background: var(--color-navy);
    transition: all var(--transition-fast);
}

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

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

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

/* ===== Main Content ===== */
.main-content {
    padding-top: var(--header-height);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--color-white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: var(--spacing-2xl);
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(201, 162, 39, 0.2);
    border: 1px solid var(--color-gold);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gold);
    margin-bottom: var(--spacing-xl);
}

.hero h1 {
    color: var(--color-white);
    font-size: var(--text-6xl);
    margin-bottom: var(--spacing-lg);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: var(--text-xl);
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
}

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

/* ===== Page Header (Inner Pages) ===== */
.page-header {
    background: var(--gradient-navy);
    padding: var(--spacing-4xl) 0;
    text-align: center;
    color: var(--color-white);
}

.page-header h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.page-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-lg);
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    font-size: var(--text-sm);
}

.breadcrumb a {
    color: var(--color-gold);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Sections ===== */
.section {
    padding: var(--spacing-4xl) 0;
}

.section-light {
    background: var(--color-off-white);
}

.section-dark {
    background: var(--gradient-navy);
    color: var(--color-white);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
    color: var(--color-white);
}

.section-dark .section-title h2::after {
    background: var(--color-gold);
}

/* ===== Cards ===== */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

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

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

.card-body {
    padding: var(--spacing-xl);
}

.card-title {
    font-size: var(--text-xl);
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-md);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-gold-dark);
    font-weight: 600;
}

.card-link:hover {
    color: var(--color-gold);
}

/* ===== Grid Layouts ===== */
.grid {
    display: grid;
    gap: var(--spacing-2xl);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

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

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ===== Stats Section ===== */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-xl);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: var(--text-5xl);
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--text-base);
    color: var(--color-medium-gray);
}

.section-dark .stat-label {
    color: rgba(255, 255, 255, 0.8);
}

/* ===== Timeline ===== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--color-gold);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: 45%;
    padding: var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.timeline-year {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-gold);
    color: var(--color-navy-dark);
    font-weight: 700;
    font-size: var(--text-sm);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--color-gold);
    border: 4px solid var(--color-white);
    border-radius: 50%;
    z-index: 1;
}

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

.gallery-item {
    position: relative;
    height: 250px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover .gallery-image {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--color-white);
    transform: translateY(100%);
    transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

/* ===== Feature List ===== */
.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
}

.feature-item {
    display: flex;
    gap: var(--spacing-lg);
}

.feature-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-light) 100%);
    border-radius: var(--radius-lg);
    color: var(--color-navy-dark);
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-content h4 {
    margin-bottom: var(--spacing-sm);
}

.feature-content p {
    color: var(--color-medium-gray);
    margin: 0;
}

/* ===== Contact Form ===== */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-dark-gray);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: var(--text-base);
    transition: border-color var(--transition-fast);
}

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

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-field.error .form-input,
.form-field.error .form-textarea {
    border-color: var(--color-tartan-red);
}

.error-message {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-tartan-red);
    font-size: var(--text-sm);
}

.form-success {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--color-off-white);
    border-radius: var(--radius-lg);
    color: var(--color-tartan-green);
}

/* ===== Accordion ===== */
.accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: var(--color-white);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition-fast);
}

.accordion-header:hover {
    background: var(--color-off-white);
}

.accordion-icon {
    width: 24px;
    height: 24px;
    position: relative;
    transition: transform var(--transition-fast);
}

.accordion-icon::before,
.accordion-icon::after {
    content: '';
    position: absolute;
    background: var(--color-gold);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.accordion-icon::before {
    width: 14px;
    height: 2px;
}

.accordion-icon::after {
    width: 2px;
    height: 14px;
}

.accordion-item.active .accordion-icon::after {
    display: none;
}

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.accordion-item.active .accordion-body {
    max-height: 500px;
}

.accordion-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-medium-gray);
}

/* ===== Lightbox ===== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-image {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
}

.lightbox-caption {
    text-align: center;
    color: var(--color-white);
    padding: var(--spacing-md);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    font-size: 30px;
    color: var(--color-white);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.lightbox-close:hover {
    color: var(--color-gold);
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-navy-dark);
    color: var(--color-white);
}

.footer-container {
    max-width: var(--container-xl);
    margin: 0 auto;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-3xl);
    padding: var(--spacing-4xl) var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.footer-logo .logo-icon {
    width: 40px;
    height: 40px;
    color: var(--color-gold);
}

.footer-logo span {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    line-height: 1.2;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.footer-motto {
    color: var(--color-gold);
    font-size: var(--text-sm);
}

.footer-heading {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.contact-list li {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.7);
}

.contact-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--color-gold);
}

.contact-list a {
    color: rgba(255, 255, 255, 0.7);
    word-break: break-word;
}

.contact-list a:hover {
    color: var(--color-gold);
}

.museum-location {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.museum-location h4 {
    color: var(--color-gold);
    font-size: var(--text-base);
    margin-bottom: var(--spacing-sm);
}

.museum-location p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-sm);
    margin: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) var(--spacing-xl);
}

.footer-bottom-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.copyright {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

.registry-id {
    font-size: var(--text-sm);
    color: var(--color-gold);
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-sm);
    font-size: var(--text-sm);
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.6);
}

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

.footer-bottom-links .separator {
    color: rgba(255, 255, 255, 0.3);
}

/* ===== Animation Classes ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-gold { color: var(--color-gold); }
.text-navy { color: var(--color-navy); }
.text-white { color: var(--color-white); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }

/* ===== Responsive Styles ===== */
@media (max-width: 1200px) {
    .footer-top {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 1024px) {
    :root {
        --text-5xl: 2.5rem;
        --text-6xl: 3rem;
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
        padding-left: 60px;
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .timeline-dot {
        left: 20px;
    }
}

@media (max-width: 768px) {
    :root {
        --text-4xl: 2rem;
        --text-5xl: 2.25rem;
        --text-6xl: 2.5rem;
        --spacing-4xl: 4rem;
    }
    
    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        padding: calc(var(--header-height) + var(--spacing-xl)) var(--spacing-xl);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-md);
        font-size: var(--text-base);
    }
    
    .nav-link-donate {
        margin-left: 0;
        margin-top: var(--spacing-md);
    }
    
    /* Logo */
    .logo-subtitle {
        display: none;
    }
    
    .logo-title {
        font-size: var(--text-base);
    }
    
    /* Hero */
    .hero {
        min-height: 70vh;
    }
    
    .hero-content {
        padding: var(--spacing-xl);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    /* Grids */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .stats {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Footer */
    .footer-top {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --text-3xl: 1.5rem;
        --text-4xl: 1.75rem;
        --text-5xl: 2rem;
        --text-6xl: 2.25rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: var(--text-4xl);
    }
    
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--text-base);
    }
}