body{
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f4f4;
    margin: 0;
    padding: 0;
}

header{
    background: #4CAF50;
    color: white;
    padding: 20px;
    text-align: center;
}

.container{
    max-width: 800px;
    margin: 20px auto;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

input, textarea{
    width: 100%;
    padding: 10px;
    margin: 5px 0 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button{
    background: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}