body {
    font-family: Arial, sans-serif;
    background: #f7f7f7;
    margin: 0; padding: 0;
}
form {
    background: #fff;
    max-width: 350px;
    margin: 50px auto;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px #ccc;
}
input, button, select {
    width: 100%;
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #bbb;
}
button {
    background: #0069d9;
    color: #fff;
    border: none;
    cursor: pointer;
}
button:hover {
    background: #004c99;
}
.error {
    color: red;
    margin-bottom: 10px;
}
.success {
    color: green;
    margin-bottom: 10px;
}
.menu {
    background: #0069d9;
    color: #fff;
    padding: 10px;
    text-align: right;
}
.menu a {
    color: #fff;
    margin-left: 10px;
    text-decoration: none;
}
.menu a:hover {
    text-decoration: underline;
}