/* =========================================
   1. Variables & Reset
   ========================================= */
:root {
    --color-primary: #111111;
    --color-accent: #009246;
    --color-accent-secondary: #ce2b37;
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-text: #2d3436;
    --color-text-light: #636e72;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius: 8px;
    --container-width: 1000px;
    --font-main: 'Futura Std', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --transition: all 0.3s ease;
}

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

/* =========================================
   2. Base Typography & Body
   ========================================= */
body {
    font-family: var(--font-main);
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

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

ul {
    list-style: none;
}

/* =========================================
   3. Header & Navigation
   ========================================= */
header {
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

.header-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

header img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

#nameBox {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.pageTitle {
    font-size: 1.5rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-primary);
    line-height: 1.2;
}

.authors {
    font-size: 0.85rem;
    color: var(--color-text-light);
    font-weight: 500;
}

nav ul {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

nav a {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    border-radius: var(--radius);
    border: 1px solid transparent;
}

nav a:hover {
    background-color: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* =========================================
   4. Main Content Layout
   ========================================= */
main {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

article {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 2.5rem;
    margin-bottom: 2rem;
    border: 1px solid rgba(0,0,0,0.03);
    scroll-margin-top: 100px;
}

/* =========================================
   5. Banner & Hero Section
   ========================================= */
#banner {
    text-align: center;
    padding: 2rem 1.5rem;
    background: linear-gradient(135deg, #fff 0%, #f1f1f1 100%);
    border-radius: var(--radius);
    margin-bottom: 2rem;
    border: 1px solid rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
}

#banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #009246 33%, #ffffff 33%, #ffffff 66%, #ce2b37 66%);
}

.banner-image-container {
    width: 100%;
    max-height: 400px;
    margin-bottom: 2rem;
    overflow: hidden;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.banner-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.banner-image-container:empty::before {
    content: 'Bannière (400px de hauteur)';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #e0e0e0 0%, #f5f5f5 100%);
    color: #999;
    font-size: 1.2rem;
    font-weight: 500;
}

#banner h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: block;
}

#banner hr {
    border: 0;
    height: 1px;
    background: #ddd;
    width: 60px;
    margin: 1.5rem auto;
}

.textContent {
    font-size: 1.05rem;
    color: var(--color-text);
    max-width: 700px;
    margin: 0 auto;
}

/* =========================================
   6. Typography within Content
   ========================================= */
h2 {
    font-size: 1.75rem;
    color: var(--color-primary);
    margin-top: 0;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent-secondary);
    display: inline-block;
}

p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

strong {
    color: var(--color-primary);
    font-weight: 700;
}

/* =========================================
   7. IMAGE GRID (replaced icon grid)
   ========================================= */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem auto;
    padding: 1rem;
}

.image-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.image-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: var(--transition);
}

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

.image-card figcaption {
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text);
    background: #fafafa;
    border-top: 1px solid rgba(0,0,0,0.05);
}

/* =========================================
   8. Resources List (Apprendre Section)
   ========================================= */
.resources-list {
    background: #f0f4f8;
    padding: 1.5rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--color-accent);
}

.resources-list p {
    margin-bottom: 0.5rem;
    text-align: left;
    font-size: 0.95rem;
}

.resources-list p:last-child {
    margin-bottom: 0;
}

/* =========================================
   9. Interactive Elements
   ========================================= */
.scroll-down-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-text-light);
    margin: 1rem 0;
    transition: var(--transition);
}

.scroll-down-btn:hover {
    color: var(--color-accent-secondary);
    transform: translateY(5px);
}

/* =========================================
   10. Footer
   ========================================= */
footer {
    margin-top: 4rem;
    padding: 2rem 1.5rem;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.9rem;
}

.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

footer a {
    color: #ccc;
    font-weight: 500;
}

footer a:hover {
    color: #fff;
    text-decoration: underline;
}

/* =========================================
   11. Responsive Design
   ========================================= */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        text-align: center;
    }

    nav ul {
        justify-content: center;
    }

    #banner h1 {
        font-size: 2rem;
    }

    article {
        padding: 1.5rem;
    }

    h2 {
        font-size: 1.5rem;
        border-bottom-width: 3px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .banner-image-container {
        max-height: 250px;
    }
    
    .image-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .image-card img {
        height: 150px;
    }
}