/* Reset et variables CSS */
:root {
    --color-primary: #1E293B;
    --color-secondary: #3B82F6;
    --color-text: #334155;
    --color-text-light: #64748B;
    --color-background: #F8FAFC;
    --color-white: #FFFFFF;
    --color-border: #E2E8F0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --font-title: 'Merriweather', serif;
    --font-body: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* En-tête */
.header {
    position: sticky;
    top: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

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

.logo-link {
    display: flex;
    align-items: center;
}

.logo {
    height: 48px;
    width: auto;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
}

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

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

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

/* Section Hero */
.hero {
    padding: 64px 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-title);
    font-size: 2.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-light);
}

/* Section des cours */
.courses-section {
    padding: 64px 0;
    flex: 1;
}

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

.section-title {
    font-family: var(--font-title);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.section-description {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

/* Grille des cours */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

/* Carte de cours */
.course-card {
    background: var(--color-white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-secondary);
}

.course-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    transition: var(--transition);
}

.course-card:hover .course-image {
    transform: scale(1.03);
}

.course-image-wrapper {
    overflow: hidden;
    position: relative;
}

.course-category {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-title {
    font-family: var(--font-title);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.course-description {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 16px;
    flex-grow: 1;
    line-height: 1.5;
}

.course-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: var(--color-white);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

.course-button:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Pied de page */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 40px 0 24px;
    margin-top: auto;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-logo {
    height: 40px;
    width: auto;
}

.footer-tagline {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
}

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

.footer-text {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    width: 100%;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    text-align: center;
}

.copyright {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        height: 70px;
    }

    .logo {
        height: 40px;
    }

    .nav-list {
        gap: 24px;
    }

    .nav-link {
        font-size: 0.9rem;
    }

    .hero {
        padding: 48px 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .courses-section {
        padding: 48px 0;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .nav-list {
        gap: 16px;
    }

    .nav-link {
        font-size: 0.85rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.35rem;
    }
}