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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    padding-bottom: 120px; /* Espace pour le footer fixe */
    position: relative;
}

.container {
    max-width: 1200px;
    width: 100%;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 50px;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.buttons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.button-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.button-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.button-card h2 {
    color: #667eea;
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.button-card p {
    color: #666;
    font-size: 1rem;
}

#footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    color: white;
    font-size: 10px;
    padding: 15px 20px;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
    z-index: 1000;
}

#footer p {
    margin: 5px 0;
    color: white;
}

#footer strong {
    color: white;
    font-weight: 600;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .buttons-grid {
        grid-template-columns: 1fr;
    }
    
    #footer {
        font-size: 9px;
        padding: 10px 15px;
    }
    
    body {
        padding-bottom: 100px; /* Espace réduit pour mobile */
    }
}