body {
    background-color: #f5f5f5;
    font-family: Arial, sans-serif;
    color: #1f2937;
}
h1 {
    color: #2563eb;
}
.titre-principal {
    color: #e11d48;
}
.conteneur {
    width: 900px;
    background: white;
    padding: 30px;
    margin: 50px auto;
    border: 1px solid #d1d5db;
    border-radius: 15px;
}
.ligne {
    display: flex;
    justify-content: flex-end;
    gap: 30px;
    align-items: center;
}
input {
    padding: 10px;
    border: 1px solde #d1d5db;
    border-radius: 8px;
    font-size: 16px;
}