header,main {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

header {
    width: 100%;
    height: 100px;
}

h1 {
    font-size: 100px;
}

main {
    padding-top: 100px;
    height: 700px;
}

#lampada {
    width: 300px;
}

button {
    width: 300px;
    height: 50px;
    font-size: 30px;
}