html{
    width: 1000px;
    margin: 0 auto;
    font-size: 16px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    background-image: url('imagen/fondo.png');
    background-size: cover; /*hace que no se me repita la imagen y ocupa todo el fonso*/
}

body{
    width: 100%;
    height: auto;
    text-align: center;
}

header{
    height: 100px;
    text-align: center;
    margin: 0;
}

main{
    width: 800px;
}

header h1{
    color: #006ea4;
    font-size: 3rem;
}

main form {
    display: inline-block;
    text-align: left;
    border-radius: 8px;
    padding: 30px;
    background-color: white;
    margin-top: 60px;
    box-shadow: #333;
}

form div {
    margin-bottom: 14px;
}

form label {
    display: inline-block;
    width: 190px;
    font-size: 1rem;
    color: #555;
}

form input {
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 6px 10px;
    font-size: 0.9rem;
    width: 200px;
}

button {
    width: 100%;
    padding: 15px;
    display: block;
    background-color: #333;
    color: white;
    border-radius: 10px;
    font-size: 0.9rem;
}

button:hover {
    background-color: #555;
}