form {
    max-width: 700px;
    margin: 40px auto;
    padding: 30px;
    background-color: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    font-family: 'Segoe UI', sans-serif;
}

h1 {
    text-align: center;
    font-size: 2rem;
    color: #333;
    margin-bottom: 25px;
}

h2 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 25px;
}

label {
    display: block;
    margin-top: 20px;
    font-weight: bold;
    color: #555;
}

input[type="text"],
input[type="number"],
textarea {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    border: 1px solid #ccc;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 1rem;
    background-color: #fff;
    transition: border 0.3s ease;
}

input[type="text"]:focus,
input[type="number"]:focus,
textarea:focus {
    border-color: #4285f4;
    outline: none;
}

input[type="checkbox"] {
    margin-right: 8px;
    transform: scale(1.2);
}

input[type="submit"] {
    margin-top: 30px;
    width: 100%;
    padding: 12px;
    background-color: #4285f4;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

input[type="submit"]:hover {
    background-color: #3367d6;
}

textarea {
    resize: vertical;
}

a {
    color: #4285f4;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

p {
    text-align: center;
    margin-top: 20px;
}

#coutTrainContainer,
#coutAvionContainer,
#coutHotelContainer,
#precisionAutresFraisContainer,
#cofinanceurContainer {
    margin-left: 20px;
    margin-top: 10px;
    padding: 10px;
    background-color: #eef3fb;
    border-left: 3px solid #4285f4;
    border-radius: 6px;
}