html, body {
    height: 100%;
}

body {
    font-family: sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1.3em;
    font-size: 1.2em;
}

button {
    font-size: 1rem;
    text-transform: uppercase;
    font-weight: bold;
    line-height: 2.5rem;
    display: block;
    border: none;
    background: #933;
    color: white;
    padding: 0 1rem;
    cursor: pointer;
    opacity: .8;
}

button:hover {
    opacity: 1;
}

button:first-child {
    background: green;
}

button:disabled {
    opacity: .5;
    cursor: default;
}

.center {
    text-align: center;
    line-height: 2rem;
}

.main {
    translate: 0 -3rem;
    max-width: 90%;
}

.title {
    font-size: 1.5em;
    margin: 0 0 1rem;
}

.box {
    padding: 1rem;
    background: #eef;
}

.box__info {
    padding: .5rem 0 .75rem;
    text-align: center;
}

.box__buttons {
    display: flex;
    gap: .5rem;
    justify-content: center;
}