@font-face {
    font-family: 'Ac437 ToshibaT300 8x16 BIOS';
    src: url('./Ac437_ToshibaT300_8x16.ttf');
}

:root {
    --txt: #e0dce2;
    --bg: #040605; /* 122312 */
    --dark: #516467;
    --font: 'Ac437 ToshibaT300 8x16 BIOS', monospace;

    
    --bl: #234a9d;
    --yl: #e9b34e;
    --rd: #c84454;
    --gr: #58c40a;

    font-size: 14pt;

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

* {
    box-sizing: border-box;
    margin: 0 0;
    padding: 0 0;

    font-family: var(--font);
    text-rendering: optimizeSpeed;
}

body {
    margin: auto;
    line-height: 1.33em;
    
    color: var(--txt);
}

header, footer {
    > * {
        width: 100%;
    }
}

header {
    height: 100vh;
    padding-bottom: 2.5vh;

    display: flex;
    flex-flow: column nowrap;
    justify-content: end;
}

main {
    width: 100%;
    padding-top: 5vh;
    padding-left: min(9vw, 14.25%);
    padding-right: 2ch;
    margin-bottom: -3em;

    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
    gap: 8em 2em;

    > * {
        margin-bottom: 3em;
    }

    > figure {
        display: grid;
        grid-template-columns: repeat(6, auto);
        gap: 2em 1ch;
        width: 100%;

        > div {
            align-content: baseline;
            min-width: 14ch;
            max-width: 8vw;
        }
        
        div:nth-child(6n - 3) {
            color: var(--dark);
        }

        div:nth-child(6n - 5) {
            color: var(--dark);
        }
    }
    
    section {
        width: max(80ch, 40vw);
        margin-right: 2.5vw;

        h2 {
            padding-bottom: 0.25ch;
            margin-bottom: 0.25ch;
        }

        h3 {
            padding: 0 0 1ch 0;
        }

        &:last-child {
            padding-bottom: 5vw;
        }
    }
}

/* typography & style */

a {
    background-color: var(--bl);
    color: var(--txt);
    letter-spacing: -0.042ex;
}

a:active, a:visited {
    background-color: var(--bg);
    color: var(--bl);
}

header, h1, h2, h3 {
    letter-spacing: 0.125ex;
}

h1, h2, h3 {
    font-size: 1em;
    color: var(--dark);
}

h2 {
    border-bottom: 1px solid var(--dark);
}

header {
    user-select: none;

    h1 {
        color: var(--txt);
        max-width: min-content;
        margin-bottom: 2.5vh;
        position: fixed;
    }

    > * {
        display: inline;
    }
}

div.header-bg {
    color: var(--dark);
    position: absolute;
    left: 5vw;
    width: 95vw;
    max-height: 87.5vh;
    overflow: hidden;
    line-height: calc(6pt * 3.6);
    animation: 
        headerwidth 4800ms infinite steps(3),
        headerpad 4s infinite steps(16),
        headerfontsize 6s infinite steps(4),
        headerlift 9s infinite steps(12);
    
    display: flex;
    flex-flow: column wrap;

    span {
        display: inline;
        &::before { content: '"'; }
        animation: headerspace 4s infinite steps(8), headercolors 1.25s infinite steps(1), headerheight 3s infinite;

        &:hover {
            background-color: var(--txt);
            color: var(--bg);
            font-weight: bold;
        }
    }

    span:nth-child(2n) {
        &::before { content: '='; }
        animation-delay: 1s;
    }

    span:nth-child(3n+2) {
        animation-duration: 0.23s;
        &::before { content: 'i'; }
    }
    
    span:nth-child(7n-1) {
        animation-delay: 4s;
        &::before { content: '&'; }
    }

    span:nth-child(6n) {
        animation-delay: 0.2s;
    }

    span:nth-child(9n+2) {
        &::before { content: '$'; }
    }
    
    span:nth-child(8n + 2) {
        animation-duration: 0.8s;
        &::before { content: '*'; }
    }

    span:nth-child(11n+5) {
        animation-delay: 0.8s;
        &::before { content: '+'; }
    }

    span:nth-child(23n-4) {
        &::before { content: '%'; }
    }

    span:nth-child(11n+9) {
        &::before { content: '!'; }
    }
    
    span:nth-child(12n-9) {
        &::before { content: '@'; }
    }

    span:nth-child(17n-1) {
        &::before { content: 'v'; }
    }
    
    span:nth-child(19n+9), span:nth-child(15n - 3) {
        &::before { content: 'S'; }
    }
    
    span:first-child {
        &::before { content: '*' }
    }
}

@keyframes headerspace {
    0% { margin: 0 0ch; }
    12% {margin: 0 0.17ch; }
    33% {margin: 0 0.4ch; }
    50% {margin: 0 1.2ch; }
    66% { margin: 0 0.4ch; }
    88% { margin: 0 0.17ch; }
    100% { margin: 0 0ch; }
}

@keyframes headerheight {
    0% { height:1ch; }
    25% { height:3ch; }
    50% { height:5ch; }
    75% { height:3ch; }
    100% { height: 1ch; }
}

@keyframes headerpad {
    0% { padding-left: 0%; padding-top: 12vh }
    33% { padding-left: 45%; padding-top: 60vh; }
    66% { padding-left: 33%; padding-top: 54vh }
    100% { padding-left: 0%; padding-top: 12vh }
}

@keyframes headerfontsize {
    0% { font-size: 0.66em; }
    50% { font-size: 2em; }
    100% { font-size: 0.66em; }
}

@keyframes headerwidth {
    0% {max-width: 33vw}
    10% {max-width: 46vw}
    20% {max-width: 64vw}
    30% {max-width: 72vw}
    40% {max-width: 79vw}
    50% {max-width: 81vw}
    60% {max-width: 77%}
    70% {max-width: 74vw}
    80% {max-width: 50vw}
    90% {max-width: 42vw}
    100% {max-width: 33vw}
}

@keyframes headercolors {
    0% { color: var(--bl); }
    25% { color: var(--yl); }
    50% { color: var(--rd); }
    75% { color: var(--gr); }
}

@keyframes headerlift {
    0% { padding-bottom: 0ch; }
    50% { padding-bottom: -32ch; }
    100% { padding-bottom: 0ch; }
}

ul > li { list-style: none; }

::selection {
    color: var(--alt2);
    background-color: var(--txt);
}

/* for phone */

@media screen and (max-width: 1024px) {
    :root {
        font-size: 9mm;
    }

    body {
        padding: 0 2.5vw;
    }

    header, main, footer {
        padding-bottom: 9.75vh;
    }

    main {
        > * {
            width: 100%;
        }
        
        > figure {
            display: flex;
            flex-flow: column nowrap;
            gap: 0;
            
            > div {
                max-width: 100%;

                span {
                    border: none;

                    :empty {
                        height: 0;
                    }
                }
            }

            :nth-child(6n) {
                padding-bottom: 1.5em;
            }
        }
    }
}