body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #fdf9ff;
    color: #333;
}

header {
    background-color: #7c3aed; /* violet intense */
    color: white;
    padding: 2rem 1rem;
    text-align: center;
    border-bottom-left-radius: 2rem;
    border-bottom-right-radius: 2rem;
}

nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    background: #6b21a8; /* violet foncé */
    padding: 1rem;
    border-radius: 2rem;
    margin: 1rem auto;
    max-width: 800px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    transition: background 0.3s;
}

nav a:hover {
    background: #9333ea;
}

section {
    padding: 2rem;
    max-width: 1000px;
    margin: auto;
}

.card {
    background: white;
    padding: 2rem;
    margin: 1rem 0;
    border-radius: 2rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 1rem;
    background: #7c3aed;
    color: white;
    border-top-left-radius: 2rem;
    border-top-right-radius: 2rem;
}