body {
    font-family: Arial, sans-serif;
    background: #f0f8ff;
    margin: 0;
    padding: 0;
}
.container {
    width: 350px;
    margin: 100px auto;
    padding: 20px;
    border: 1px solid #ccc;
    background: white;
    border-radius: 8px;
    text-align: center;
}
input, button {
    margin: 8px 0;
    padding: 10px;
    width: 100%;
}
button {
    background: teal;
    color: white;
    border: none;
    cursor: pointer;
}
header {
    background: #006666;
    color: white;
    padding: 10px;
    text-align: center;
}