body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f8;
    color: #333;
    text-align: center;
    margin: 0;
    padding: 0;
}

header {
    background-color: #0073e6;
    color: white;
    padding: 20px 0;
}

header img {
    height: 60px;
    vertical-align: middle;
}

h1 {
    margin: 10px 0 0 0;
}

/* Grille des applications */
nav.app-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
}

nav.app-grid a {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 150px;
    padding: 20px;
    background-color: white;
    border-radius: 12px;
    text-decoration: none;
    color: #0073e6;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

nav.app-grid a img {
    height: 60px;
    margin-bottom: 10px;
}

nav.app-grid a:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

footer {
    margin-top: 50px;
    padding: 20px 0;
    background-color: #e0e0e0;
    color: #555;
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
}