main.css

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

html, body {
    height: 100vh;
    max-height: 100vh;
    margin: 0;
    background: rgb(17,70,158);
    background: linear-gradient(3deg, rgba(17,70,158,1) 0%, rgba(61,130,246,1) 52%, rgba(79,143,255,1) 100%);
}


body, header {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100vw;
}

#menu-button {
    align-self: flex-start;
    border-radius: 1em;
    border: solid transparent;
    margin: 1vmax;
    font-size: 2vh;
    height: fit-content;
    width: fit-content;
}

#menu-button {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1em;
    max-width: 1vmax;
}

.dot {
    width: 12px;
    height: 12px;
    margin: 3px;
    background: #fff;
    border-radius: 50%;
    display: block;
}

nav {
    display: flex; 
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,1);
    background: rgb(0,0,0);
    background: linear-gradient(180deg, rgba(0,0,0,0.969625350140056) 9%, rgba(0,0,0,0.9612219887955182) 14%, rgba(0,0,0,0.8883928571428571) 100%);
    background: linear-gradient(180deg, rgba(17,70,158,10.969625350140056) 0%, rgba(61,130,246,0.9612219887955182) 52%, rgba(79,143,255,0.888) 100%);
    padding: 10px;
    line-height: 28px;
    text-align: justify;
    position: absolute;
    bottom: 0;
    margin: 0;
    height: 100vh;
    width: 100vw;
    font-size: 4vmin;
    transition: height .5s;
    z-index: 20;
}

.hide-nav {
    display: none;
}

nav > h1 {
    justify-self: flex-start;
}

.human-players, .ai-players, .human-players > div {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: 80%;
}

.ai-players > div {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 80%;
}

.emoji {
    font-size: 15vmin;
    transition: all 0.2s;
}

.emoji:hover {
    cursor: pointer;
    transform: scale(1.3);
}

#dijkstra, #dfs, #bfs {
    margin-bottom: 3vmin;
    margin-top: 4vmin;
}

#dijkstra, #bfs {
    pointer-events: none;
}

.locked {
    cursor: not-allowed;
}

header {
    height: fit-content;
    margin-bottom: 10px;
}

h1 {
    text-align: center;
    color: white;
}

.button, #timer {
    display:inline-block;
    padding:0.35em 1.2em;
    border:0.1em solid white;
    margin:0 0.3em 0.3em 0;
    border-radius:0.12em;
    box-sizing: border-box;
    text-decoration:none;
    font-weight:300;
    color:white;
    text-align:center;
    transition: all 0.2s;
    background-color: none;
}

.button:hover{
    color:#000000;
    background-color:white;
    cursor: pointer;
}

#timer {
    border-radius: 45%;
    padding: 0.45em 1em;
    margin-bottom: 10px;
}

footer {
    display: flex;
    flex-direction: row;
    justify-content: space-evenly;
    align-items: center;
    width: 100%;
    margin: 10px;
    height: fit-content;
    max-height: 25%;
}

.arrows {
    display: flex;
    flex-direction: column;
    align-content: center;
    justify-content: center;
    width: fit-content;
    max-height: 100%;
    font-size: 5vh;

    user-select: none;
    -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
    -khtml-user-select: none; /* Konqueror HTML */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation; 
    /* disables zoom on double tap */
}

.up-container {
    width: 100%;
    display: flex;
    flex-direction: row;
    align-content: center;
    justify-content: center;

}

/* no idea why this is the only selector that works... */
body > footer > div > div.left-down-right-container {
    display: flex;
    flex-direction: row;
    align-content: center;
    justify-content: space-evenly;
    width: 100%;
}

#up, #right {
    cursor: pointer;
}

#down, #left {
    padding-right: 10px;
    cursor: pointer;
    
}

#up:active, #right:active, #down:active, #left:active {
    transform: scale(1.2);
}

#board {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    max-width: 90%;
    height: 65%;
    padding: 2vmin;
    border-radius: 2vmin;
    background: rgb(185,185,185);
    background: linear-gradient(0deg, rgba(185,185,185,1) 4%, rgba(221,221,221,1) 65%, rgba(247,247,247,1) 93%);
}

.square {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    outline: solid 0.1px;
    max-height: 10%;
    min-height: 10%;
    width: 6.25%;
    min-width: 6.25%;
    aspect-ratio: 1/1;
    background: rgb(169,169,169);
    background: linear-gradient(0deg, rgba(169,169,169,1) 21%, rgba(179,179,179,1) 55%, rgba(193,193,193,1) 94%);
    border-radius: 0.8vmin;
}
/* height & width depend on number of elements...if 80 els, h:12.5% w:10% will allow 8 rows of 10... */
/* this aspect ratio pushes to get as close to square as it's allowed to */
/* min height keeps squares the same size even when there is nothing occupying the squares*/

.available {
    background: white;
}

.on-path {
    background: rgb(24,104,236);
    background: linear-gradient(0deg, rgba(24,104,236,1) 0%, rgba(61,130,246,1) 22%, rgba(79,143,255,1) 75%);
}

.path-emoji {
    font-size: 2vmin;
}

#player, #goal {
    font-size: 2.5vmax;
    z-index: 10;
}

/* --------- Animations --------- */
.ticking {
    transform: scale(1);
    animation: ticking 1s infinite;
    font-weight: bold;
}

@keyframes ticking {
    
    0% {
        transform: scale(1);
        font-weight: 300;
    }
    50% {
        transform: scale(1.3);
        font-weight: bold;
        color: #C84630
    }
    100% {
        transform: scale(1);
        font-weight: 300;
    }
    /* 50% {transform: scale(4.3)};
    100% {transform: scale(5.4)}; */
}

.frustrated {
    animation: shake 0.1s;
    
}

@keyframes shake {
    0% {transform: translate(10%, 0);}
    50% {transform: translate(-10%, 0);}
    100% {transform: translate(10%, 0);}
}

@media only screen and (max-width: 600px) {
    .square {
        content: '\200b';
    }
}