html {
    height: 100%;
}

body {
    padding: 0;
    margin: 0;
    background: black;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    flex-direction: column;
}

.main {
    display: flex;
    flex-direction: column;
}

button {
    background: black;
    font-size: 5rem;
    color: red;
    border: 5px red solid;
    margin: 0.5rem;
    padding: 1rem;
}

button:hover {
    background: red;
    font-size: 5rem;
    color: black;
    border: 5px red solid;
    margin: 0.5rem;
}

* {
    cursor: crosshair;
    font-family: monospace;
}

p {
    position: absolute;
    bottom: 0;
    left: 0;
    color: red;
    margin-left: 1rem;
}