/**
 * ============================================
 * COGNITIVE FOUNDATIONS - STYLES COMMUNS
 * ============================================
 *
 * Styles partagés entre tous les chapitres du manuel.
 * Les couleurs sont définies via des variables CSS
 * dans le fichier chapters-themes.css
 *
 * SOMMAIRE :
 * -----------------------------------------
 * 1. RESET & BASE
 * 2. NAVIGATION & PROGRESS BAR
 * 3. HERO SECTION
 * 4. TYPOGRAPHY
 * 5. SECTIONS & LAYOUT
 * 6. CARDS
 * 7. INFO BOXES & QUOTES
 * 8. OBJECTIVES
 * 9. MODEL DIAGRAMS
 * 10. DEMOS (Stroop, Cocktail Party...)
 * 11. TABS
 * 12. STATS & COMPARISONS
 * 13. GLOSSARY
 * 14. QCM (Quiz)
 * 15. BUTTONS
 * 16. FOOTER
 * 17. ANIMATIONS
 * 18. MULTIMEDIA (Audio/Video)
 * 19. RESPONSIVE
 * -----------------------------------------
 */


/* ==========================================
   1. RESET & BASE
   ========================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Source Sans Pro', sans-serif;
    background: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.7;
    overflow-x: hidden;
}


/* ==========================================
   2. NAVIGATION & PROGRESS BAR
   ========================================== */

/* Barre de progression de lecture */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--primary);
    z-index: 1001;
    transition: width 0.1s ease;
}

/* Navigation principale */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

nav ul {
    display: flex;
    justify-content: center;
    gap: 2rem;
    list-style: none;
    flex-wrap: wrap;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

nav a:hover {
    color: var(--text-light);
}

nav a:hover::after {
    width: 100%;
}

/* Navigation index (avec logo) */
nav .nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}


/* ==========================================
   3. HERO SECTION
   ========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    position: relative;
    overflow: hidden;
}

/* Fond animé du hero */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--hero-gradient);
    animation: pulse 8s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

/* Badge de chapitre */
.chapter-badge,
.book-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease;
    box-shadow: var(--shadow-md);
}

/* Icônes du hero */
.hero-visual {
    margin-top: 3rem;
    animation: fadeIn 1s ease 0.6s both;
}

.attention-icon,
.memory-icon,
.context-icon,
.knowledge-icon,
.language-icon,
.reasoning-icon,
.problem-icon,
.chapter-icon {
    font-size: 6rem;
    filter: drop-shadow(0 0 30px var(--glow-color, rgba(124, 58, 237, 0.5)));
    animation: float 3s ease-in-out infinite;
}

.eye-icon,
.brain-icon {
    width: 120px;
    height: 120px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    animation: float 3s ease-in-out infinite;
    box-shadow: 0 20px 60px var(--glow-color, rgba(37, 99, 235, 0.4));
}

/* Boutons du hero */
.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    animation: fadeInUp 0.8s ease 0.8s both;
    flex-wrap: wrap;
}


/* ==========================================
   4. TYPOGRAPHY
   ========================================== */

h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--h1-color, #1e293b);
    animation: fadeInUp 0.8s ease 0.2s both;
}

h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-light);
}

h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--accent);
}

.subtitle {
    font-size: 1.3rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 2rem;
    animation: fadeInUp 0.8s ease 0.4s both;
}


/* ==========================================
   5. SECTIONS & LAYOUT
   ========================================== */

section {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

/* Ligne décorative sous les titres de section */
.section-header h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}


/* ==========================================
   6. CARDS
   ========================================== */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.card {
    background: var(--bg-medium);
    border-radius: 15px;
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}


/* ==========================================
   7. INFO BOXES & QUOTES
   ========================================== */

/* Boîte d'information */
.info-box {
    background: var(--bg-medium);
    border-left: 4px solid var(--secondary);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    border-radius: 0 10px 10px 0;
}

.info-box.warning {
    border-left-color: var(--accent);
}

.info-box.concept {
    border-left-color: var(--success);
}

.info-box-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

/* Boîte de citation */
.quote-box {
    background: var(--quote-bg, linear-gradient(135deg, rgba(124, 58, 237, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%));
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem 0;
    position: relative;
    border: 1px solid var(--quote-border, rgba(124, 58, 237, 0.3));
}

.quote-box::before {
    content: '"';
    font-family: 'Playfair Display', serif;
    font-size: 6rem;
    position: absolute;
    top: -20px;
    left: 20px;
    color: var(--secondary);
    opacity: 0.3;
}

.quote-text {
    font-style: italic;
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.quote-author {
    text-align: right;
    color: var(--accent);
    font-weight: 600;
}


/* ==========================================
   8. OBJECTIVES
   ========================================== */

.objectives {
    background: var(--objectives-bg, linear-gradient(135deg, rgba(240, 147, 251, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%));
    border-radius: 20px;
    padding: 3rem;
    margin: 2rem 0;
    border: 1px solid var(--objectives-border, rgba(240, 147, 251, 0.2));
    box-shadow: var(--shadow-sm);
}

.objectives h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.objectives ol {
    list-style: none;
    counter-reset: objective;
}

.objectives li {
    counter-increment: objective;
    padding: 1rem 0 1rem 3.5rem;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

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

/* Numéros circulaires des objectifs */
.objectives li::before {
    content: counter(objective);
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2.5rem;
    height: 2.5rem;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
}


/* ==========================================
   9. MODEL DIAGRAMS
   ========================================== */

.model-diagram {
    background: var(--bg-medium);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.model-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1.5rem 0;
}

.model-box {
    background: var(--bg-light);
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.model-box.highlight {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.15);
}

.model-box.filter {
    background: var(--error);
    color: white;
}

.model-box.attenuate {
    background: var(--accent);
    color: var(--bg-dark);
}

.model-arrow {
    color: var(--text-muted);
    font-size: 1.5rem;
}


/* ==========================================
   10. DEMOS
   ========================================== */

.demo-container {
    background: var(--bg-medium);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.demo-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.demo-title span {
    font-size: 2rem;
}

/* Démo Stroop */
.stroop-demo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 2rem 0;
}

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

.stroop-column h4 {
    margin-bottom: 1rem;
}

.stroop-word {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5rem 0;
    font-family: 'JetBrains Mono', monospace;
}

/* Démo Cocktail Party */
.cocktail-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin: 2rem 0;
    padding: 2rem;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 15px;
}

.person-icon {
    font-size: 3rem;
    opacity: 0.5;
    transition: all 0.3s ease;
}

.person-icon.highlighted {
    opacity: 1;
    transform: scale(1.2);
    filter: drop-shadow(0 0 10px rgba(37, 99, 235, 0.5));
}


/* ==========================================
   11. TABS
   ========================================== */

.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.tab {
    padding: 0.8rem 1.5rem;
    background: var(--bg-light);
    border: none;
    border-radius: 10px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tab:hover {
    background: rgba(37, 99, 235, 0.15);
    color: var(--text-light);
}

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

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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


/* ==========================================
   12. STATS & COMPARISONS
   ========================================== */

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.comparison-item {
    background: var(--bg-medium);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.comparison-item.pro {
    border-color: var(--success);
}

.comparison-item.con {
    border-color: var(--error);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-box {
    background: var(--bg-medium);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.stat-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--text-muted);
    margin-top: 0.5rem;
}


/* ==========================================
   13. GLOSSARY
   ========================================== */

.glossary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.glossary-item {
    background: var(--bg-medium);
    border-radius: 10px;
    padding: 1.5rem;
    border-left: 3px solid var(--secondary);
}

.glossary-term {
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.glossary-def {
    color: var(--text-muted);
    font-size: 0.95rem;
}


/* ==========================================
   14. QCM (Quiz)
   ========================================== */

.qcm-container {
    max-width: 900px;
    margin: 0 auto;
}

/* Barre de progression du quiz */
.qcm-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--bg-medium);
    border-radius: 10px;
}

.qcm-progress-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-light);
    border-radius: 4px;
    margin: 0 1rem;
    overflow: hidden;
}

.qcm-progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Question */
.qcm-question {
    background: var(--bg-medium);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.qcm-question-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.qcm-question-number {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    color: white;
}

.qcm-question-text {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Options de réponse */
.qcm-options {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.qcm-option {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-medium);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.qcm-option:hover {
    background: var(--qcm-hover-bg, rgba(240, 147, 251, 0.1));
    border-color: var(--secondary);
}

.qcm-option.selected {
    background: var(--qcm-selected-bg, rgba(240, 147, 251, 0.2));
    border-color: var(--secondary);
}

.qcm-option.correct {
    background: rgba(16, 185, 129, 0.2);
    border-color: var(--success);
}

.qcm-option.incorrect {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--error);
}

.qcm-option-letter {
    width: 30px;
    height: 30px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: 1rem;
    flex-shrink: 0;
}

.qcm-option.selected .qcm-option-letter {
    background: var(--secondary);
}

.qcm-option.correct .qcm-option-letter {
    background: var(--success);
}

.qcm-option.incorrect .qcm-option-letter {
    background: var(--error);
}

/* Feedback */
.qcm-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 10px;
    display: none;
}

.qcm-feedback.show {
    display: block;
}

.qcm-feedback.correct {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
}

.qcm-feedback.incorrect {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
}

/* Boutons d'action */
.qcm-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.qcm-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.qcm-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--btn-glow, rgba(37, 99, 235, 0.4));
}

.qcm-btn-secondary {
    background: var(--bg-light);
    color: var(--text-light);
}

.qcm-btn-secondary:hover {
    background: var(--bg-medium);
}

/* Score final */
.qcm-score {
    text-align: center;
    padding: 3rem;
    background: var(--bg-medium);
    border-radius: 20px;
    margin-top: 2rem;
}

.qcm-score-value {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary);
}

.qcm-score-label {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Question répondue = non cliquable */
.qcm-question.answered .qcm-option {
    cursor: default;
    pointer-events: none;
}


/* ==========================================
   15. BUTTONS
   ========================================== */

.btn {
    padding: 1rem 2rem;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.4);
}

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

.btn-secondary:hover {
    background: var(--secondary);
    transform: translateY(-3px);
}


/* ==========================================
   16. FOOTER & SOURCE BOX
   ========================================== */

.source-box {
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 10px;
    padding: 1.5rem;
    margin: 3rem 0;
    text-align: center;
}

.source-box a {
    color: var(--accent);
    text-decoration: none;
}

.source-box a:hover {
    text-decoration: underline;
}

footer {
    background: var(--bg-medium);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--accent);
}


/* ==========================================
   17. ANIMATIONS
   ========================================== */

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Classe pour animations au scroll */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

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


/* ==========================================
   18. MULTIMEDIA (AUDIO/VIDEO)
   ========================================== */

.media-resources {
    background: var(--bg-medium);
    border-radius: 20px;
    padding: 2.5rem;
    margin: 2rem auto 3rem;
    max-width: 1200px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.media-resources-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    color: var(--text-light);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.media-resources-subtitle {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.media-card {
    background: var(--bg-light);
    border-radius: 15px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.media-card:hover {
    border-color: var(--secondary);
    transform: translateY(-3px);
}

.media-card-title {
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.media-card-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

/* Audio player */
.media-card audio {
    width: 100%;
    border-radius: 8px;
    outline: none;
}

/* Style personnalise pour audio (navigateurs compatibles) */
.media-card audio::-webkit-media-controls-panel {
    background: rgba(37, 99, 235, 0.2);
}

/* Video player */
.media-card video {
    width: 100%;
    border-radius: 10px;
    background: #000;
}

.media-card-video {
    grid-column: 1 / -1;
}

.media-card-video video {
    max-height: 400px;
    object-fit: contain;
}

/* Badge multimedia pour index */
.media-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    background: var(--primary, #2563eb);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 20px;
    margin-left: 0.5rem;
}

.chapter-media-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.chapter-media-info span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}


/* ==========================================
   19. RESPONSIVE
   ========================================== */

@media (max-width: 768px) {

    /* Navigation */
    nav ul {
        gap: 1rem;
    }

    /* Typographie */
    h1 { font-size: 2rem; }
    h2 { font-size: 1.8rem; }

    /* Grilles */
    .card-grid,
    .glossary-grid {
        grid-template-columns: 1fr;
    }

    /* Démos */
    .stroop-demo {
        grid-template-columns: 1fr;
    }

    /* Objectifs */
    .objectives {
        padding: 2rem 1.5rem;
    }

    /* Diagrammes */
    .model-flow {
        flex-direction: column;
    }

    .model-arrow {
        transform: rotate(90deg);
    }

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