body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 600px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 {
    text-align: center;
}
label {
    display: block;
    margin-top: 10px;
}
input,
select,
textarea {
    width: 95%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: none;
}
input[type="submit"] {
    width: 20%;
    background-color: #28a745;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 15px;
}
input[type="submit"]:hover {
    background-color: #218838;
}
.success {
    padding: 10px;
    margin-bottom: 15px;
    background-color: #d4edda;
    color: #155724;
    border-radius: 4px;
}
.error {
    padding: 10px;
    margin-bottom: 15px;
    background-color: #f8d7da;
    color: #721c24;
    border-radius: 4px;
}