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

body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    text-decoration: none;
    color: #fff;
}

.nav-brand span { color: #ff6600; }

nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 1rem;
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    flex: 1;
}

.page-title {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.page-subtitle {
    color: #666;
    margin-bottom: 2rem;
}

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

.card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 1rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.card h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #666;
}

.badge {
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-size: 0.8rem;
    text-transform: uppercase;
}

.badge.facile { background: #d4edda; color: #155724; }
.badge.moyen { background: #fff3cd; color: #856404; }
.badge.difficile { background: #f8d7da; color: #721c24; }

.description {
    margin-bottom: 1rem;
}

.actions {
    display: flex;
    gap: 0.5rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9rem;
}

.btn-primary { background: #007bff; color: #fff; }
.btn-warning { background: #ffc107; color: #000; }
.btn-danger { background: #dc3545; color: #fff; }

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .grid { grid-template-columns: 1fr; }
}