body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 0;
}
header {
    background: #007bff;
    padding: 10px 0;
}
nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}
.btn {
    background: white;
    color: #007bff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 20px;
}
.btn:hover {
    background: #e0e0e0;
}
.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 {
    color: #333;
}
form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
input, textarea, button {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 20px;
}
textarea {
    height: 100px;
}
button {
    background: #007bff;
    color: white;
    cursor: pointer;
}
button:hover {
    background: #0056b3;
}
.error {
    color: red;
}
.success {
    color: green;
}
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        align-items: center;
    }
    .btn {
        width: 100%;
        text-align: center;
    }
}