body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    height: 100vh;
    background: url('https://centx.online/Images/vip-fond3.png') no-repeat center center fixed;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    background-color: rgba(255, 255, 255, 0.85);
    padding: 40px 30px;
    border-radius: 14px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 420px;
    box-sizing: border-box;
    backdrop-filter: blur(6px);
}

h2 {
    text-align: center;
    margin-bottom: 25px;
    color: #111;
    font-size: 24px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #444;
}

input[type="text"],
select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    width: 100%;
    padding: 14px;
    background-color: #b89d58;
    border: none;
    color: #fff;
    font-size: 17px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #a3843c;
}

.error-message {
    color: #b00020;
    text-align: center;
    font-weight: bold;
    margin-top: 15px;
}

/* ✅ Responsive: pour smartphones */
@media (max-width: 600px) {
    .container {
        padding: 50px 35px;
    }

    input[type="text"],
    select,
    button {
        font-size: 18px;
        padding: 16px;
    }

    h2 {
        font-size: 26px;
    }

    /* ✅ Adapter l'image de fond pour bien voir "VIP" */
    body {
        background-size: contain;
        background-position: center top;
    }
}