* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
:root{
    --bg-color: pink;
}
body {
    height: 100vh;
    display: grid;
    place-content: center;
    background-color: var(--bg-color);
}
.container {
    display: grid;
    gap: 12px;
}
.container input {
    font-size: 2rem;
    text-align: center;
}
.container button {
    padding: 12px;
}