@font-face {
    font-family: 'Nimbus Sans L';
    src: url(../fonts/nimbus-sans-l-regular.woff);
}

@font-face {
    font-family: 'Nimbus Sans L';
    src: url(../fonts/nimbus-sans-l-bold.woff);
    font-weight: bold;
}

:root {
    --size: 3;
    --board-size: 85vmin;
    --black: black;
    --yellow: #f8ba00;
    --gap: 4px;
}

body {
    font-family: 'Nimbus Sans L', sans-serif;
    background-color: white;
    overflow: hidden;
    cursor: default;
    margin: 0;
    opacity: 0;
    transition: opacity 2s ease;
}

#outer {
    display: table;
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
}

#middle {
    display: table-cell;
    vertical-align: middle;
}

#inner {
    margin-left: auto;
    margin-right: auto;
}

h1 {
    text-align: center;
    color: var(--black);
    font-size: calc(var(--board-size) / 4.6);
    font-weight: bold;
    text-indent: -4px;
    margin-top: 0;
    margin-bottom: 9vh;
}

.letter-i {
    background: linear-gradient(to bottom, var(--yellow) 33%, var(--black) 33%, var(--black) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.letter-i.off {
    background: linear-gradient(to bottom,  var(--black) 0%, var(--black) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.button {
    display: inline-grid;
    box-sizing: border-box;
    border: var(--black) solid;
    border-width: calc(var(--board-size) / 33);
    place-items: center;
    cursor: pointer;
    width: calc(var(--board-size) / 5.8);
    height: calc(var(--board-size) / 5.8);
    background-color: var(--yellow);
    border-radius: 50%;
    vertical-align: middle;
    transform: translateY(calc(var(--board-size) / -60));
}

.button.off {
    background-color: var(--black);
    transition: background-color 0.05s linear;
}

.dot {
    width: calc((var(--board-size) / var(--size) - 4px) / 8);
    height: calc((var(--board-size) / var(--size) - 4px) / 8);
    border-radius: 50%;
}

.dot.on {
    background-color: var(--black);
}

.board {
    display: grid;
    grid-template-columns: repeat(var(--size), 1fr);
    width: var(--board-size);
    height: var(--board-size);
    border: 10px solid var(--black);
    border-radius: 7px;
    padding: calc(var(--gap) / 2);
    margin: auto;
}

.cell {
    display: grid;
    position: relative;
    place-items: center;
    width: calc(var(--board-size) / var(--size) - var(--gap));
    height: calc(var(--board-size) / var(--size) - var(--gap));
    border-radius: 7px;
    background-color: var(--black);
    cursor: pointer;
    margin: calc(var(--gap) / 2);
    transition: background-color 0.05s linear;
}

.cell .dot {
    transition: background-color 0.05s linear;
}

.cell.on {
    background-color: var(--yellow);
}

.cell:not(.on) .dot.on {
    background-color: var(--yellow);
}

.instant {
    transition: background-color 0.0s linear !important;
}

.scale {
    transition: transform 0.5s linear, background-color 0.05s linear;
    transform: scale(1.1);
}

.blink {
    animation: blink 0.2s linear;
}

.visible {
    opacity: 1;
}

#designed {
    text-align: center;
    align-self: auto;
    color: white;
    font-size: 9px; 
    margin-top: -11px;
}

@keyframes blink {

    0% {
        background-color: var(--yellow);
    }

    50% {
        background-color: var(--black);
    } 

    100% {
        background-color: var(--yellow);
    } 
}

@media (prefers-color-scheme: dark) {

    :root {
        --black: gray;
    }

    body {
      background-color: black;
    }

    #designed {
        color: black;
    } 
}

@media (orientation: landscape) and (max-height: 460px) {

    h1 {
        display: none;
    }
}

@media (min-width: 460px) and (min-height: 460px) {

    :root {
        --board-size-big: 402px;
        --gap: 6px;
    }

    h1 {
        font-size: 90px;
        text-indent: -5px;
    }

    .button { 
        width: 67px;
        height: 67px;
        border-width: 12.5px;
        transform: translateY(-5px);
    }

    .dot {
        width: calc((var(--board-size-big) / var(--size) - var(--gap)) / 8);
        height: calc((var(--board-size-big) / var(--size) - var(--gap)) / 8);
    }

    .board {
        width: var(--board-size-big);
        height: var(--board-size-big); 
        border-width: 15px;
        padding: calc(var(--gap) / 2);
    }

    .cell {
        width: calc(var(--board-size-big) / var(--size) - var(--gap));
        height: calc(var(--board-size-big) / var(--size) - var(--gap));
        margin: calc(var(--gap) / 2);
    }

    #designed {
        font-size: 12px;
        margin-top: -15.5px;
    }
}

.noselect {
    -webkit-tap-highlight-color: transparent;
          -webkit-touch-callout: none;
            -webkit-user-select: none;
               -moz-user-select: none;
                -ms-user-select: none;
                    user-select: none;
}