style.css

:root {
    --t: 0.25s;
}

@font-face {
    font-family: Titillium;
    src: url(./assets/Titillium.ttf);
}

* {
    box-sizing: border-box;

    font-family: Titillium, Arial, Helvetica, sans-serif;
}

button {
    border: none;
    outline: none;

    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
}

body {
    min-width: 400px;
    min-height: 600px;
    margin: 0px;
    padding: 0px;

    background-color: var(--bg);
}
a {
    color: inherit;

    transition: color var(--t);
}
a:hover {
    color: var(--a);
}

body > canvas {
    z-index: 0;

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(110%);

    opacity: 0%;
    visibility: hidden;
    filter: blur(10px);

    transition: transform var(--t), opacity var(--t), visibility var(--t), filter var(--t);
}
body.game > canvas {
    transform: translate(-50%, -50%) scale(100%);

    opacity: 100%;
    visibility: inherit;
    filter: blur(0px);
}

body > #game-hud-top {
    z-index: 1;

    position: absolute;
    top: 0px;
    left: 50%;
    transform-origin: 50% 100%;
    transform: translate(-50%, -50%) scale(110%);

    width: 100%;
    max-width: 100%;
    padding: 10px;

    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    gap: 10px;

    opacity: 0%;
    visibility: hidden;
    filter: blur(10px);

    transition: transform var(--t), opacity var(--t), visibility var(--t), filter var(--t);
}
body.game > #game-hud-top {
    transform: translate(-50%, 0%) scale(100%);

    opacity: 100%;
    visibility: inherit;
    filter: blur(0px);
}
body > #game-hud-top > #score {
    margin-top: 10px;

    color: var(--fg);

    font-size: 3em;
    user-select: none;
}
body > #game-hud-top > #moves {
    position: absolute;

    top: 50%;
    right: 20px;
    transform: translateY(-50%);

    color: var(--fg-a);

    font-size: 1.5em;
    user-select: none;
}
body > #game-hud-bottom {
    z-index: 1;

    position: absolute;
    bottom: 0px;
    left: 50%;
    transform-origin: 50% 0%;
    transform: translate(-50%, 50%) scale(110%);

    width: 100%;
    max-width: 100%;
    padding: 10px;

    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-end;
    align-items: stretch;
    align-content: stretch;
    gap: 10px;

    opacity: 0%;
    visibility: hidden;
    filter: blur(10px);

    transition: transform var(--t), opacity var(--t), visibility var(--t), filter var(--t);
}
body.game > #game-hud-bottom {
    transform: translate(-50%, 0%) scale(100%);

    opacity: 100%;
    visibility: inherit;
    filter: blur(0px);
}
body > #game-hud-bottom > #info-tiles {
    padding: 0px 50px;
    
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    gap: 0px;

    outline: 0px solid #f00;
}
body > #game-hud-bottom > #info-tiles > div {
    position: relative;

    width: 20px;
    min-width: 20px;
    aspect-ratio: 1 / 1;
    margin: 5px;

    background-size: contain;
    background-repeat: no-repeat;

    outline: 0px solid #0f0;
}
body > #game-hud-bottom > .nav {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
}
body > #game-hud-bottom > .nav > .hamburger {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: center;
    align-content: center;
    gap: 10px;
}
body > #game-hud-bottom > .nav > .hamburger > ion-icon {
    min-width: 1em;
}
body > #game-hud-bottom > .nav > .hamburger > .nav {
    transform: translateX(-20px);

    justify-content: flex-start !important;

    opacity: 0%;
    visibility: hidden;

    transition: transform var(--t), opacity var(--t), visibility var(--t);
}
body > #game-hud-bottom > .nav > .hamburger:hover > .nav {
    transform: translateX(0px);

    opacity: 100%;
    visibility: inherit;
}
body > #game-hud-bottom > .nav > .nav,
body > #game-hud-bottom > .nav > .hamburger > .nav {
    flex-basis: 100%;

    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-end;
    align-items: center;
    align-content: center;
    gap: 10px;
}
body > #game-hud-bottom > .nav > .nav > button,
body > #game-hud-bottom > .nav > .hamburger > ion-icon,
body > #game-hud-bottom > .nav > .hamburger > .nav > button {
    padding: 0px;

    color: var(--fg);

    font-size: 2em;

    background-color: transparent;

    transition: color var(--t);
}
body > #game-hud-bottom > .nav > .nav > button:not(:disabled):hover,
body > #game-hud-bottom > .nav > .hamburger > .nav > button:not(:disabled):hover {
    color: var(--a);
}
body > #game-hud-bottom > .nav > .nav > button:disabled,
body > #game-hud-bottom > .nav > .hamburger > .nav > button:disabled {
    color: var(--fg-8);
}

body > #title {
    z-index: 1;

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(110%);

    max-width: 100%;
    max-height: 100%;

    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    gap: 10px;

    opacity: 0%;
    visibility: hidden;
    
    transition: transform var(--t), opacity var(--t), visibility var(--t);
}
body.title > #title {
    transform: translate(-50%, -50%) scale(100%);

    opacity: 100%;
    visibility: inherit;
}
body > #title > .title {
    color: var(--fg);

    font-size: 4em;
    letter-spacing: 0.25em;
}
body > #title > button {
    align-self: stretch;

    transform: scale(100%);

    padding: 15px;

    font-size: 2em;

    background-color: var(--a);
    color: var(--fg-8);
    opacity: 100%;

    transition: transform var(--t), opacity var(--t);
}
body > #title > button:not(:disabled):hover {
    transform: scale(110%);
}
body > #title > button:disabled {
    opacity: 75%;
}
body > #title > .nav {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    gap: 10px;
}
body > #title > .nav > button {
    position: relative;

    aspect-ratio: 1 / 1;
    padding: 10px;

    font-size: 2em;

    background-color: transparent;
    color: var(--fg);
    opacity: 100%;

    transition: color var(--t), opacity var(--t);
}
body > #title > .nav > button:not(:disabled):hover {
    color: var(--bg);
}
body > #title > .nav > button:disabled {
    opacity: 75%;
}
body > #title > .nav > button::before {
    content: "";

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0%);

    width: 100%;
    height: 100%;

    background-color: var(--fg);
    opacity: 0%;

    transition: transform var(--t), opacity var(--t);
}
body > #title > .nav > button:not(:disabled):hover::before {
    transform: translate(-50%, -50%) scale(100%);

    opacity: 100%;
}

body > #finish {
    z-index: 1;

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(110%);

    width: 100%;
    max-width: 100%;
    height: 100%;
    max-height: 100%;

    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    gap: 0px;

    opacity: 0%;
    visibility: hidden;
    
    transition: transform var(--t), opacity var(--t), visibility var(--t);
}
body.finish > #finish {
    transform: translate(-50%, -50%) scale(100%);

    opacity: 100%;
    visibility: inherit;
}
body > #finish > #finish-icon {
    width: 30px;
    aspect-ratio: 1 / 1;
    margin-bottom: 20px;

    background-size: contain;
    background-repeat: no-repeat;
}
body > #finish > .title {
    padding: 0.25em 2em;

    background-color: var(--fg);
    color: var(--bg);

    font-size: 1.5em;
    user-select: none;
}
body > #finish > #finish-score {
    color: var(--fg);

    font-size: 3em;
}
body > #finish > #new-best {
    transform: translateY(20px);

    min-width: max-content;
    padding: 0.1em 1em;
    margin-top: 20px;

    background-color: var(--a);
    color: var(--bg);
    opacity: 0%;
    visibility: hidden;

    transition: transform var(--t), opacity var(--t), visibility var(--t);
}
body > #finish.best > #new-best {
    transform: translateY(0px);

    opacity: 100%;
    visibility: inherit;
}
body > #finish > #finish-moves {
    color: var(--fg);

    font-size: 1.5em;
}
body > #finish > .footer {
    transform: translateY(0px);

    margin-top: 100px;

    color: var(--fg-8);

    user-select: none;

    transition: transform var(--t);
}
body > #finish > .footer:hover {
    transform: translateY(-5px);
}

body > .page {
    z-index: 1;

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(110%);

    width: 75%;
    max-width: 75%;
    height: 75%;
    max-height: 75%;

    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: stretch;
    align-content: center;
    gap: 10px;

    opacity: 0%;
    visibility: hidden;
    
    transition: transform var(--t), opacity var(--t), visibility var(--t);
}
body > .page > .header {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: center;
    align-content: center;
    gap: 10px;

    color: var(--fg);
    border-bottom: 2px solid var(--fg);

    font-size: 1.5em;
}
body > .page > .header > .space {
    flex-basis: 100%;
}
body > .page > .header > :not(.space) {
    min-width: max-content;
}
body > .page > .header > ion-icon:not(.space) {
    min-width: 1em;
}
body > .page > .header > button {
    position: relative;

    aspect-ratio: 1 / 1;
    padding: 5px;

    background-color: transparent;
    color: var(--fg);
    opacity: 100%;

    transition: color var(--t), opacity var(--t);
}
body > .page > .header > button:not(:disabled):hover {
    color: var(--bg);
}
body > .page > .header > button:disabled {
    opacity: 75%;
}
body > .page > .header > button::before {
    content: "";

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0%);

    width: 100%;
    height: 100%;

    background-color: var(--fg);
    opacity: 0%;

    transition: transform var(--t), opacity var(--t);
}
body > .page > .header > button:not(:disabled):hover::before {
    transform: translate(-50%, -50%) scale(100%);

    opacity: 100%;
}
body > .page > .content {
    max-width: 100%;
    max-height: calc(100% - 3em);
    overflow: auto;
}

body.board > #board {
    transform: translate(-50%, -50%) scale(100%);

    opacity: 100%;
    visibility: inherit;
}
body > #board > .content {
    position: relative;
}
body > #board > .content > #board-entries {
    max-width: 100%;
    max-height: 100%;
    overflow: auto;

    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: stretch;
    align-content: center;
}
body > #board > .content > #board-entries > div,
body > #board > .content > .you {
    padding: 0px 10px;

    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: center;
    align-content: center;
    gap: 10px;

    background-color: var(--a-0);
    color: var(--fg);

    font-size: 1.5em;

    transition: background-color var(--t), color var(--t);
}
body > #board > .content > #board-entries > div.this,
body > #board > .content > .you {
    background-color: var(--a);
    color: var(--bg);
}
body > #board > .content > #board-entries > div > .number,
body > #board > .content > .you > .number {
    min-width: 2em;
}
body > #board > .content > #board-entries > div > .score,
body > #board > .content > .you > .score {
    flex-basis: 66%;
}
body > #board > .content > #board-entries > div > .date,
body > #board > .content > .you > .date {
    flex-basis: 33%;

    min-width: 3em;
    
    opacity: 50%;

    text-align: right;
    font-size: 0.75em;
}
body > #board > .content > #board-entries > div.special {
    justify-content: center;

    color: var(--fg-8);

    font-size: 1em;
}
body > #board > .content > #you-top {
    position: absolute;
    top: 0%;
    left: 0%;

    width: 100%;
    max-width: 100%;
}
body > #board > .content > #you-bottom {
    position: absolute;
    bottom: 0%;
    left: 0%;

    width: 100%;
    max-width: 100%;
}

body.help > #help {
    transform: translate(-50%, -50%) scale(100%);

    opacity: 100%;
    visibility: inherit;
}
body > #help > .content {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: stretch;
    align-content: center;
    gap: 20px;
}
body > #help > .content > .content {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: stretch;
    align-content: center;
    gap: 20px;
}
body > #help > .content > .content > .content {
    padding: 10px 0px;

    color: var(--fg);
}
body > #help > .content > .content > .demo {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
}
body > #help > .content > .center {
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    gap: 10px;
}
body > #help > .content > .center > .content {
    color: var(--fg);
}