body {
    font-family: Arial, sans-serif;
    background: #eef2f5;
    padding: 20px;
}
.container {
    max-width: 420px;
    margin: auto;
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
h1 {
    margin-bottom: 20px;
    font-size: 24px;
    text-align: center;
}
.form-group {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}
.form-group label {
    margin-bottom: 5px;
    font-weight: bold;
}
.form-group input,
.form-group textarea,
.form-group select {
    padding: 8px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
.form-group textarea { resize: vertical; }
button {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    border: none;
    background: #007acc;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
}
button:hover {
    background: #006bb3;
}
#result {
    margin-top: 20px;
    text-align: center;
}
#result iframe {
    width: 220px;
    height: 220px;
    border: 1px solid #ccc;
    border-radius: 4px;
}