body {
    font-family: system-ui, sans-serif;
    margin: 0;
    padding: 0;
}

main {
    min-height: 100vh;
    display: grid;
    justify-items: center;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
    width: min(560px, 92vw);
}

li {
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 10px;
    margin: 10px 0;
}

.hint {
    opacity: 0.7;
    font-size: 14px;
    margin-top: 10px;
    text-align: center;
}

label {
    display: inline-flex;
    gap: 8px;
    cursor: pointer;
}

input:checked + label {
    text-decoration: line-through;
    opacity: 0.6;
}