body {
    margin: 0;
    background-color: black;
    color: white;

    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex: 1;
}

h1 {
    font-size: xxx-large;
    color: red;
}

p {
    font-size: x-large;
}

#buton1 {
    padding: 10px;
    margin: 10px;
    background-color: blue;
    font-size: 2rem;
    border: 3px solid green;
    border-radius: 15px;
}

#buton1:active {
    background-color: darkblue;
    border-color: darkgreen;
}

footer {
    margin-top: auto;
    margin-bottom: 25px;
    text-align: center;
}