* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    font-family: monospace;
    font-size: calc(vmin + 5px);
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: #222;
    color: white;
}

button {
    font-family: inherit;
    font-size: 4rem;
    background: none;
    border: 1rem white solid;
    padding: 1rem;
    border-radius: 2rem;
    color: white;
    cursor: pointer;
}