/* ========================================
   Styles - Portail des Cours ISME
   École ISME - Formation professionnelle
   ======================================== */

/* --- Variables CSS --- */
:root {
    --primary-color: #0F172A;
    --primary-light: #1E293B;
    --accent-color: #3B82F6;
    --accent-hover: #2563EB;
    --background-main: #F8FAFC;
    --background-card: #FFFFFF;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --border-color: #E2E8F0;
    --shadow-subtle: 0 1px 3px rgba(15, 23, 42, 0.08);
    --shadow-medium: 0 4px 12px rgba(15, 23, 42, 0.1);
    --shadow-elevated: 0 8px 24px rgba(15, 23, 42, 0.12);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
}

/* --- Reset de base --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--background-main);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Typographie --- */
h1, h2, h3 {
    font-family: 'Montserrat', 'Inter', sans-serif;
    font-weight: 600;
}

/* --- Header --- */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 2.5rem 1.5rem;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: 20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    border-radius: 50%;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    position: relative;
    z-index: 1;
}

.logo-section {
    flex-shrink: 0;
}

.logo {
    height: 70px;
    width: auto;
    background: white;
    padding: 0.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
}

.logo:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-medium);
}

.header-text {
    flex: 1;
}

.main-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 0.95rem;
    opacity: 0.85;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* --- Contenu principal --- */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    width: 100%;
}

/* --- Section d'introduction --- */
.intro-section {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--background-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--border-color);
}

.intro-section h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.intro-section p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1rem;
}

/* --- Grille des cours --- */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    padding: 1rem 0;
}

/* --- Carte de cours --- */
.course-card {
    background: var(--background-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
}

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

/* --- Zone d'image carrée --- */
.card-image-wrapper {
    width: 100%;
    aspect-ratio: 1 / 1;
    background: linear-gradient(145deg, #f8fafc 0%, #f1f5f9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    overflow: hidden;
    position: relative;
}

.card-image-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(59, 130, 246, 0.02) 100%);
    pointer-events: none;
}

.card-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-smooth);
}

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

/* --- Contenu de la carte --- */
.card-content {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    flex: 1;
    background: var(--background-card);
}

.card-content h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    line-height: 1.3;
    transition: var(--transition-smooth);
}

.course-card:hover .card-content h3 {
    color: var(--accent-color);
}

.card-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    flex: 1;
    margin-bottom: 1rem;
}

.access-label {
    display: inline-flex;
    align-items: center;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition-smooth);
}

.access-label::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--accent-color);
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.course-card:hover .access-label::after {
    transform: translateX(4px);
}

.course-card:hover .access-label {
    color: var(--accent-hover);
}

/* --- Footer --- */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 1.5rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer p {
    font-size: 0.85rem;
    opacity: 0.8;
    margin: 0.25rem 0;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .header {
        padding: 2rem 1rem;
    }

    .header-container {
        flex-direction: column;
        text-align: center;
    }

    .logo {
        height: 60px;
    }

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

    .main-content {
        padding: 2rem 1rem;
    }

    .courses-grid {
        gap: 1.5rem;
    }

    .card-image-wrapper {
        aspect-ratio: 1 / 1;
        padding: 1rem;
    }
}

@media (max-width: 600px) {
    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
        max-width: 400px;
        margin: 0 auto;
    }

    .intro-section {
        padding: 1.5rem;
    }

    .intro-section h2 {
        font-size: 1.25rem;
    }

    .card-content {
        padding: 1rem;
    }

    .card-content h3 {
        font-size: 1rem;
    }

    .card-content p {
        font-size: 0.85rem;
    }
}

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

.course-card {
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
}

.course-card:nth-child(1) { animation-delay: 0.1s; }
.course-card:nth-child(2) { animation-delay: 0.2s; }
.course-card:nth-child(3) { animation-delay: 0.3s; }
.course-card:nth-child(4) { animation-delay: 0.4s; }

/* --- Accessibilité --- */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

.course-card:focus {
    outline: 3px solid var(--accent-color);
    outline-offset: 3px;
}

.course-card:focus .card-image-wrapper {
    outline: 2px solid var(--accent-color);
    outline-offset: -2px;
}