:root {
    --cell-size: 100px;
    --gap: 5px;
    --color-gunmetal: #012A36;
    --color-space-cadet: #29274C;
    --color-royal-purple: #7E52A0;
    --color-lilac: #D295BF;
    --color-fairy-tale: #E6BCCD;
}

* {
    box-sizing: border-box;
    font-weight: bold;
}

body {
    margin: 0;
    font-family: system-ui, sans-serif;
    background: var(--color-gunmetal);
    color: var(--color-fairy-tale);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

main {
    text-align: center;
}

#board {
    display: grid;
    grid-template-columns: repeat(3, var(--cell-size));
    gap: var(--gap);
    margin: 1rem auto;
}

.cell {
    width: var(--cell-size);
    height: var(--cell-size);
    font-size: 2rem;
    background: var(--color-lilac);
    border: 2px solid var(--color-fairy-tale);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-space-cadet);
}

.cell:disabled {
    cursor: not-allowed;
}

.cell.win {
    background: var(--color-space-cadet);
    color: white;
}

#message {
    font-size: 1.5rem;
    padding: 0.5rem 1rem;
}

#reset {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    background: var(--color-royal-purple);
    color: var(--color-fairy-tale);
    border: none;
    border-radius: 4px;
    cursor: pointer;
}