/* ======= RESET ======= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* ======= BODY ======= */
body {
    background-color: #1b1b2f; /* bleu foncé */
    color: #e0e0e0;
    padding: 20px 40px;
}

/* ======= HEADER ======= */
header {
    margin-bottom: 30px;
    text-align: center;
}

h1 {
    color: #7df9ff; /* cyan clair */
    font-size: 2.5rem;
    margin-bottom: 15px;
}

/* ======= SUBMENU ======= */
nav.submenu ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 25px;
}

nav.submenu ul li a {
    color: #7df9ff;
    font-weight: bold;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 6px;
    transition: background 0.3s, color 0.3s;
}

nav.submenu ul li a:hover {
    background-color: #00bfff;
    color: #1b1b2f;
}

/* ======= MAIN ======= */
main {
    background-color: #26264d;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #7df9ff;
}

p {
    font-size: 1rem;
    line-height: 1.6;
    text-align: center;
}

/* ======= RESPONSIVE ======= */
@media (max-width: 768px) {
    body { padding: 15px 20px; }
    h1 { font-size: 2rem; }
    nav.submenu ul { flex-direction: column; gap: 15px; }
}