* {
    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;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    width: 100%;
    text-align: center;
}

/* Variante large pour les pages avec du contenu large (tableaux, etc.) */
.container-wide {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 1100px;
    width: 100%;
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 40px;
}

@media (max-width: 480px) {
    .container {
        padding: 30px 20px;
    }

    .logo {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }
}

.footer {
    margin-top: 30px;
    color: #666;
    font-size: 0.9rem;
}