body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #14171c;
    color: #ffffff;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 700px;
    background-color: #1f2329;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.6);
    text-align: center;
}

header h1 {
    font-size: 2.8rem;
    margin-bottom: 5px;
    color: #ffffff;
}

.subtitle {
    color: #a3a7af;
    font-size: 1rem;
    margin-bottom: 30px;
}

.button-container {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 25px 0;
}

.btn {
    background-color: #434950;
    color: #ffffff;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.3s, transform 0.3s;
    box-sizing: border-box;
    width: 100%;
}

.btn:hover {
    background-color: #565c65;
    transform: translateY(-3px);
}

.social-icons {
    margin: 25px 0;
}

.social-icons a {
    color: #ffffff;
    font-size: 24px;
    margin: 0 12px;
    transition: color 0.3s, transform 0.3s;
}

.social-icons a:hover {
    color: #9ca3af;
    transform: scale(1.2);
}

footer {
    color: #70767e;
    font-size: 14px;
    margin-top: 20px;
}

/* Styles spécifiques à la page Windows 11 */
.content {
    text-align: left;
    margin-bottom: 25px;
}

.content h2, .content h3 {
    color: #ffffff;
}

.content ul {
    padding-left: 20px;
}

.content li {
    margin-bottom: 10px;
    line-height: 1.6;
}

/* Responsive design */
@media (max-width: 600px) {
    .container { padding: 20px; }
    header h1 { font-size: 2rem; }
    .subtitle { font-size: 0.9rem; }
    .btn { font-size: 15px; }
    .social-icons a { font-size: 20px; margin: 0 8px; }
}