main.css

/* TODO: Switch to SCSS! */
/* TODO: and break per component */

* { /* poor's man reset */
    margin: 0;
    padding: 0;
}

body {
    font-family: fantasy, sans-serif;
}

.grid {
    width: fit-content;
    margin: auto;
}

.row {
    display: flex;
    flex-direction: row;
    width: fit-content;
}
.row:not(:last-child) {
    border-bottom: 1px solid grey;
}

.cell {
    width: 33.3vmin;
    height: 33.3vmin;
    line-height: 33.3vmin; /* all these '33vmin' need to be parameterized */
    font-size: 33.3vmin;
    text-align: center;
}
.cell:not(:last-child) {
    border-right: 1px solid grey; /* should be a SCSS var as well... */
}
.cell.taken {
    cursor: not-allowed;
}

.announce-result {
    background-color: rgba(192, 192, 192, 0.8);
    position: fixed;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-family: monospace;
}
.announce-result h1 {
    font-size: 8em;
}
.announce-result button {
    margin: 0.5em;
    padding: 0.5em;
    font-size: 2em;
    font-family: inherit;
}