/* ================================================
   Formation Digitale France - Main Stylesheet
   ================================================ */

/* ------------------------------------------------
   CSS Variables / Design System
   ------------------------------------------------ */
:root {
    /* Colors */
    --color-primary: #1E3A5F;
    --color-secondary: #4A6FA5;
    --color-accent: #7BA3C9;
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F8F9FA;
    --color-bg-tertiary: #EEF2F6;
    --color-text-primary: #2D3748;
    --color-text-secondary: #5A6978;
    --color-text-muted: #8896A6;
    --color-border: #E2E8F0;
    --color-success: #48BB78;
    --color-white: #FFFFFF;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Font Sizes */
    --fs-h1: 48px;
    --fs-h2: 36px;
    --fs-h3: 24px;
    --fs-h4: 20px;
    --fs-body: 16px;
    --fs-small: 14px;
    --fs-caption: 12px;

    /* Spacing */
    --section-padding: 100px;
    --container-max: 1140px;
    --grid-gap: 32px;
    --card-padding: 32px;
    --element-spacing: 24px;

    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 12px;
    --transition: 0.3s ease;
}

/* ------------------------------------------------
   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-family);
    font-size: var(--fs-body);
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}

ul, ol {
    list-style: none;
}

/* ------------------------------------------------
   Skip Link (Accessibility)
   ------------------------------------------------ */
.skip-link {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-white);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    z-index: 10000;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 20px;
    text-decoration: none;
}

/* ------------------------------------------------
   Typography
   ------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-bottom: var(--element-spacing);
}

h1 {
    font-size: var(--fs-h1);
    font-weight: 700;
}

h2 {
    font-size: var(--fs-h2);
}

h3 {
    font-size: var(--fs-h3);
}

h4 {
    font-size: var(--fs-h4);
}

p {
    margin-bottom: 1rem;
}

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

.subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-top: -16px;
    margin-bottom: var(--grid-gap);
}

/* ------------------------------------------------
   Layout
   ------------------------------------------------ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

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

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

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

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

.section-dark p {
    color: rgba(255, 255, 255, 0.9);
}

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

/* Grid System */
.grid {
    display: grid;
    gap: var(--grid-gap);
}

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

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

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

.grid-60-40 {
    grid-template-columns: 60% 40%;
    gap: 60px;
    align-items: center;
}

.grid-40-60 {
    grid-template-columns: 40% 60%;
    gap: 60px;
    align-items: center;
}

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

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

.main-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links a {
    font-size: var(--fs-small);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    position: relative;
    padding: 8px 0;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--color-text-primary);
}

/* Mobile Navigation Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-primary);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 24px;
}

.mobile-nav-close {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--color-text-primary);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.mobile-nav-links a {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.mobile-nav-links a.active {
    color: var(--color-primary);
}

/* ------------------------------------------------
   Buttons
   ------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--font-family);
    font-size: var(--fs-body);
    font-weight: 500;
    letter-spacing: 0.3px;
    text-decoration: none;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}

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

.btn-primary:hover {
    background: var(--color-secondary);
    color: var(--color-white);
    text-decoration: none;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-bg-secondary);
    text-decoration: none;
}

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

.btn-white:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
    text-decoration: none;
}

.btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* ------------------------------------------------
   Hero Section
   ------------------------------------------------ */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 55% 45%;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    margin-bottom: var(--element-spacing);
    animation: fadeInUp 0.6s ease forwards;
}

.hero-text .lead {
    margin-bottom: var(--grid-gap);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.hero-text .btn-group {
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-image {
    position: relative;
    animation: fadeIn 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.hero-decoration {
    position: absolute;
    top: -40px;
    right: -40px;
    width: 200px;
    height: 200px;
    background: var(--color-bg-tertiary);
    border-radius: 50%;
    z-index: -1;
}

/* ------------------------------------------------
   Cards
   ------------------------------------------------ */
.card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

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

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--color-secondary);
    margin-bottom: var(--element-spacing);
}

.card-icon svg {
    width: 24px;
    height: 24px;
}

.card h3, .card h4 {
    margin-bottom: 12px;
}

.card p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.card-alt {
    background: var(--color-bg-secondary);
    border: none;
}

/* ------------------------------------------------
   Feature List
   ------------------------------------------------ */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.feature-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-secondary);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature-item span {
    color: var(--color-text-secondary);
}

/* ------------------------------------------------
   Section Headers
   ------------------------------------------------ */
.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--section-padding);
}

.section-header h2 {
    margin-bottom: 16px;
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

/* ------------------------------------------------
   Tabs
   ------------------------------------------------ */
.tabs {
    margin-top: var(--grid-gap);
}

.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    padding: 16px 24px;
    font-family: var(--font-family);
    font-size: var(--fs-body);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
}

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

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-content {
    display: none;
    padding: var(--grid-gap) 0;
    animation: fadeIn 0.3s ease;
}

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

.tab-content h3 {
    margin-bottom: 16px;
}

.content-list {
    margin-top: 24px;
}

.content-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

.content-list li:last-child {
    border-bottom: none;
}

.content-list li svg {
    width: 18px;
    height: 18px;
    color: var(--color-success);
}

/* ------------------------------------------------
   Accordion / FAQ
   ------------------------------------------------ */
.accordion {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.accordion-item {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 20px 24px;
    font-family: var(--font-family);
    font-size: var(--fs-body);
    font-weight: 500;
    color: var(--color-text-primary);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background var(--transition);
}

.accordion-header:hover {
    background: var(--color-bg-secondary);
}

.accordion-header svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    transition: transform var(--transition);
}

.accordion-item.active .accordion-header svg {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-content-inner {
    padding: 0 24px 24px;
    color: var(--color-text-secondary);
}

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

/* ------------------------------------------------
   Alternating Content Blocks
   ------------------------------------------------ */
.content-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.content-block:last-child {
    margin-bottom: 0;
}

.content-block.reverse {
    direction: rtl;
}

.content-block.reverse > * {
    direction: ltr;
}

.content-block-text h3 {
    margin-bottom: 16px;
}

.content-block-text p {
    color: var(--color-text-secondary);
}

.content-block-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

/* ------------------------------------------------
   Info Box / Notice
   ------------------------------------------------ */
.info-box {
    background: var(--color-bg-tertiary);
    border-left: 4px solid var(--color-primary);
    padding: var(--card-padding);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.info-box h3, .info-box h4 {
    margin-bottom: 12px;
}

.info-box p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* ------------------------------------------------
   CTA Section
   ------------------------------------------------ */
.cta-section {
    background: var(--color-primary);
    color: var(--color-white);
    text-align: center;
    padding: 80px 0;
}

.cta-section h2 {
    color: var(--color-white);
    margin-bottom: 16px;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: var(--element-spacing);
}

.cta-section .secondary-text {
    margin-top: 16px;
    font-size: var(--fs-small);
    color: rgba(255, 255, 255, 0.7);
}

/* ------------------------------------------------
   Page Header / Breadcrumb
   ------------------------------------------------ */
.page-header {
    padding-top: 140px;
    padding-bottom: 60px;
    background: var(--color-bg-secondary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

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

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

.breadcrumb span {
    color: var(--color-text-secondary);
}

.page-header h1 {
    margin-bottom: 16px;
}

.page-header .lead {
    max-width: 720px;
}

/* ------------------------------------------------
   Forms
   ------------------------------------------------ */
.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: var(--fs-small);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-family);
    font-size: var(--fs-body);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

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

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.form-checkbox input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--color-primary);
}

.form-checkbox label {
    font-size: var(--fs-small);
    color: var(--color-text-secondary);
}

.form-note {
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    margin-top: 16px;
}

/* ------------------------------------------------
   Contact Page
   ------------------------------------------------ */
.contact-grid {
    display: grid;
    grid-template-columns: 60% 40%;
    gap: 60px;
}

.contact-info h3 {
    margin-bottom: 16px;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.contact-info-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-secondary);
    margin-top: 2px;
}

.contact-info-item span {
    color: var(--color-text-secondary);
}

.contact-note {
    margin-top: 24px;
    padding: 16px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    font-size: var(--fs-small);
    color: var(--color-text-muted);
}

.response-expectations {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

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

.expectation-item svg {
    width: 32px;
    height: 32px;
    color: var(--color-secondary);
    margin-bottom: 12px;
}

.expectation-item p {
    font-size: var(--fs-small);
    color: var(--color-text-secondary);
    margin: 0;
}

/* ------------------------------------------------
   Articles Grid
   ------------------------------------------------ */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--grid-gap);
}

.article-card {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    transition: all var(--transition);
}

.article-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-secondary);
}

.article-card h3 {
    font-size: var(--fs-h4);
    margin-bottom: 12px;
}

.article-card p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.article-card a {
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.article-card a svg {
    width: 16px;
    height: 16px;
}

/* ------------------------------------------------
   Legal Pages
   ------------------------------------------------ */
.legal-content {
    max-width: 800px;
}

.legal-content h2 {
    font-size: var(--fs-h3);
    margin-top: 48px;
    margin-bottom: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.legal-content h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.legal-content p {
    color: var(--color-text-secondary);
}

.legal-content ul {
    margin: 16px 0;
    padding-left: 24px;
}

.legal-content li {
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    list-style: disc;
}

.legal-meta {
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

/* ------------------------------------------------
   Footer
   ------------------------------------------------ */
.site-footer {
    background: var(--color-bg-secondary);
    padding: 80px 0 40px;
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.footer-description {
    color: var(--color-text-secondary);
    font-size: var(--fs-small);
    line-height: 1.7;
}

.footer-title {
    font-size: var(--fs-body);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 20px;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: var(--fs-small);
    color: var(--color-text-secondary);
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.copyright {
    font-size: var(--fs-small);
    color: var(--color-text-muted);
    margin: 0;
}

.disclaimer {
    font-size: var(--fs-caption);
    color: var(--color-text-muted);
    margin: 0;
}

/* ------------------------------------------------
   Programmes Page Specific
   ------------------------------------------------ */
.program-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 32px;
    padding: 40px;
    margin-bottom: 24px;
}

.program-card:last-child {
    margin-bottom: 0;
}

.program-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    color: var(--color-secondary);
}

.program-icon svg {
    width: 32px;
    height: 32px;
}

.program-content h3 {
    margin-bottom: 12px;
}

.program-content > p {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.program-topics {
    margin-bottom: 24px;
}

.program-topics h4 {
    font-size: var(--fs-small);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.program-topics ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.program-topics li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--fs-small);
    color: var(--color-text-secondary);
}

.program-topics li svg {
    width: 16px;
    height: 16px;
    color: var(--color-success);
}

.program-meta {
    display: flex;
    gap: 32px;
    font-size: var(--fs-small);
    color: var(--color-text-muted);
}

.program-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.program-meta svg {
    width: 16px;
    height: 16px;
}

/* ------------------------------------------------
   Animations
   ------------------------------------------------ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
}

.fade-in-up {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* Scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ------------------------------------------------
   Responsive Design
   ------------------------------------------------ */
@media (max-width: 1200px) {
    :root {
        --fs-h1: 42px;
        --fs-h2: 32px;
        --section-padding: 80px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 992px) {
    :root {
        --fs-h1: 36px;
        --fs-h2: 28px;
        --fs-h3: 22px;
        --section-padding: 60px;
    }

    .grid-2,
    .grid-60-40,
    .grid-40-60 {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text .btn-group {
        justify-content: center;
    }

    .hero-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .content-block {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .content-block.reverse {
        direction: ltr;
    }

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

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

    .program-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .program-icon {
        margin: 0 auto;
    }

    .program-topics ul {
        grid-template-columns: 1fr;
    }

    .program-meta {
        justify-content: center;
    }

    .response-expectations {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    :root {
        --fs-h1: 32px;
        --fs-h2: 26px;
        --fs-h3: 20px;
        --fs-h4: 18px;
        --section-padding: 60px;
        --card-padding: 24px;
    }

    .nav-links {
        display: none;
    }

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

    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 60px;
    }

    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .tab-nav {
        flex-wrap: nowrap;
        padding-bottom: 8px;
    }

    .tab-btn {
        padding: 12px 16px;
        font-size: var(--fs-small);
    }

    .page-header {
        padding-top: 120px;
        padding-bottom: 40px;
    }
}

@media (max-width: 576px) {
    :root {
        --fs-h1: 28px;
        --fs-h2: 24px;
        --section-padding: 48px;
    }

    .container {
        padding: 0 16px;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
    }

    .btn-group .btn {
        width: 100%;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .card {
        padding: 20px;
    }

    .info-box {
        padding: 20px;
    }

    .program-card {
        padding: 24px;
    }
}

/* ------------------------------------------------
   Print Styles
   ------------------------------------------------ */
@media print {
    .site-header,
    .site-footer,
    .mobile-nav-overlay,
    .btn,
    .skip-link {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .section {
        padding: 24pt 0;
    }

    h1, h2, h3 {
        page-break-after: avoid;
    }

    img {
        max-width: 100%;
        page-break-inside: avoid;
    }
}