style.css

* {
    font-family: 'Roboto', sans-serif;
}

body {
    width: 100%;
    margin: 0;
    background-color: #202020;
    color: white;
    display: grid;
    grid-template-columns: 22% 18% 20% 20% 20%;
}

h1 {
    grid-column: 3;
    grid-row: 1;
    justify-self: center;
}

main {
    grid-row: 2;
    grid-column: 3;
    justify-self: center;
    border-bottom: 1px solid black;
    border-right: 1px solid black;
    width: min-content;
}

.row {
    display: flex;
}

.cell {
    border-top: 1px solid black;
    border-left: 1px solid black;
    background-color: white;
}

#nextTetromino {
    width: min-content;
}

#panel {
    grid-row: 2;
    grid-column: 4;
    display: flex;
    flex-direction: column;
    width: max-content;
}

#info {
    text-align: center;
    font-weight: 300;
    font-size: 16px;
    grid-row: 2;
    grid-column: 1;
    justify-self: center;
}

ul {
    padding-left: 10px;
    list-style: none;
}

button {
    border: none;
    color: inherit;
    background-color: dodgerblue;
    margin: 0;
    margin-top: 16px;
    padding: 8px 16px 8px 16px;
    font-size: 16px;
    cursor: pointer;
}

button:disabled {
    background-color: #1c7ad6;
    cursor: default;
    color: gray;
}

a {
    color: dodgerblue;
    text-decoration: underline;
}

.overlay {
    position: fixed;
    display: none;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 2;
    flex-direction: column;
    align-content: center;
    align-items: center;
}

.overlay * {
    z-index: 2;
    transform: translateY(75px);
    text-align: center;
}

#pauseOverlay h1 {
    letter-spacing: 5px;
    font-size: 80px;
    font-style: italic;
    color: dodgerblue;
    margin: 0px 20px;
}

#gameOverOverlay h1 {
    letter-spacing: 5px;
    font-size: 80px;
    font-style: italic;
    color: red;
    margin: 0px 20px;
}

#pauseTimer {
    display: none;
    font-size: 64px;
    color: yellow;
}