*,
*::before,
*::after {
    box-sizing: border-box;
}

*:not(dialog) {
    margin: 0;
}

body {
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

input,
button,
textarea,
select {
    font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

p {
    text-wrap: pretty;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    text-wrap: balance;
}

.controls {
    display: grid;
    gap: 12px;
    width: 240px;
    margin: 12px 0;
}

.field {
    display: grid;
    gap: 6px;
}

label {
    font-size: 0.9rem;
}

input {
    padding: 6px 8px;
}

#startBtn {
    padding: 8px 10px;
    cursor: pointer;
}

#board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    width: 240px;
}

.cell {
    width: 80px;
    height: 80px;
    font-size: 2rem;
}