*{
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0 10px;
    background-color: #fff;
    color: #333;
    text-align: center;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
}

p {
    max-width: 800px;
    margin: 10px auto;
    line-height: 1.6;
    font-size: 16px;
}

form {
    max-width: 600px;
    margin: 30px auto;
    text-align: left;
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

label {
    display: block;
    margin: 15px 0 5px;
    font-weight: bold;
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

textarea {
    min-height: 100px;
    resize: vertical;
}
.required {
    color: red;
    font-weight: bold;
    margin-left: 4px;
}

input[type="submit"] {
    margin-top: 20px;
    padding: 12px 25px;
    background-color: #ff6600;
    color: white;
    font-size: 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: block;
}

input[type="submit"]:hover {
    background-color: #e65c00;
}

.lien-retour {
    display: inline-block;
    margin: 30px auto 10px;
    padding: 12px 25px;
    background-color: #333;
    color: white;
    font-size: 16px;
    border-radius: 6px;
    text-decoration: none;
    text-align: center;
    transition: background-color 0.3s ease;
}

.lien-retour:hover {
    background-color: #555;}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    form {
        padding: 15px;
    }

    p {
        font-size: 15px;
    }

    .lien-retour {
        width: 100%;
        font-size: 18px;
    }
}