body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f7f6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    color: #333;
}

.container {
    background-color: #ffffff;
    padding: 30px 40px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px;
    box-sizing: border-box;
}

h1 {
    text-align: center;
    color: #007bff;
    margin-bottom: 30px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #555;
}

.required {
    color: #dc3545;
    margin-left: 5px;
}

input[type="text"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 16px;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

small {
    display: block;
    margin-top: 5px;
    color: #6c757d;
    font-size: 0.85em;
}

button[type="submit"] {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button[type="submit"]:hover {
    background-color: #0056b3;
}

#message {
    text-align: center;
    margin-top: 20px;
    padding: 15px;
    border-radius: 5px;
    font-weight: bold;
}

#message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

#message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.hidden {
    display: none;
}