* {
    margin: 0;
    padding: 0;
}
*,
*::before,
*::after {
    box-sizing: border-box;
}
body, html {
    height: 100%;
    font-family: Arial, sans-serif;
    font-size: 16px;
}
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100%;
    padding: 1rem;
}