body {
    font-family: 'Inter', sans-serif;
    background-color: #0f172a; /* Bleu très foncé pour un look moderne */
    color: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    text-align: center;
    padding: 3rem;
    border-radius: 12px;
    background-color: rgba(30, 41, 59, 0.5); /* Effet "glassmorphism" très léger */
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #3b82f6, #8b5cf6); /* Dégradé stylé */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.2rem;
    color: #94a3b8;
    margin-bottom: 2rem;
}

button {
    background-color: #3b82f6;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

button:hover {
    background-color: #2563eb;
}

button:active {
    transform: scale(0.95);
}