improving-accessibility-ltconf-2025/style.css

@import "atkinson-hyperlegible.css";

:root {
  --spacing: 1em;

  --bg-lum: 1;
  --bg-chroma: 30%;
  --bg-hue: 240;
  
  font-size: 18pt;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-lum: 0.3;
  }
  body {
    background: black;
  }
}

body {
  font-family: 'Atkinson Hyperlegible';
  line-height: 1.5;
  width: 594mm;
  height: 841mm;
  margin: 0;
  padding: 2cm;
  --shrink: 100%;
  transform: translate(calc(-50% + 0.5 * var(--shrink)),calc(-50% + 0.5 * var(--shrink))) scale(var(--shrink));

  display: grid;
  grid-template-rows: auto 1fr auto;
  align-items: center;
}

header {
  text-align: center;
  font-size: 1.2rem;

  display: grid;
  grid-template:
    "title title title title"
    ". name portrait ." 
    / 1fr auto auto 1fr
  ;
  gap: 1em;
  justify-content: center;

  & h1 {
    grid-area: title;
  }

  & p {
    grid-area: name;
  }

  & .portrait {
    height: 5em;
    border-radius: 50%;
    align-self: center;
    grid-area: portrait;
    border: 0.2em solid #d9c181;
    box-sizing: border-box;
  }
}

h1, h2 {
  margin: 0;
}

main {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1em 2em;
  align-items: center;

  &:has(:nth-child(6)) { --num-slides: 6;}
  &:has(:nth-child(7)) { --num-slides: 7;}
  &:has(:nth-child(8)) { --num-slides: 8;}
  &:has(:nth-child(9)) { --num-slides: 9;}
  &:has(:nth-child(10)) { --num-slides: 10;}
  &:has(:nth-child(11)) { --num-slides: 11;}
  &:has(:nth-child(12)) { --num-slides: 12;}
  &:has(:nth-child(13)) { --num-slides: 13;}

  & :nth-child(1) { --index: 1;}
  & :nth-child(2) { --index: 2;}
  & :nth-child(3) { --index: 3;}
  & :nth-child(4) { --index: 4;}
  & :nth-child(5) { --index: 5;}
  & :nth-child(6) { --index: 6;}
  & :nth-child(7) { --index: 7;}
  & :nth-child(8) { --index: 8;}
  & :nth-child(9) { --index: 9;}
  & :nth-child(10) { --index: 10;}
  & :nth-child(11) { --index: 11;}
  & :nth-child(12) { --index: 12;}
  & :nth-child(13) { --index: 13;}
  
  & section {
    --slide-number: calc(var(--index) / var(--num-slides));
    
    border-radius: 0.5em;

    --bg-hue: calc(var(--slide-number) * 360);
    background-color: oklch(var(--bg-lum) var(--bg-chroma) var(--bg-hue));
    border: 0.2em solid;
    border-color: color-mix(in oklch, oklch(var(--bg-lum) var(--bg-chroma) var(--bg-hue)), black 20%);

    padding: 1em;

    --col: span 1;

    grid-column: var(--col);

    &.plain {
      text-align: center;
      background: none;
      border: none;
      align-self: start;
      padding: 0;

      & p {
        margin-top: 0;
      }
    
      & .qrcode {
        width: 4cm;
        margin: 1em;
      }
    }

  }
}

dl.quotes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.25em;
    
    & dt {
        &::before {content: '“';}
        &::after {content: '”';}
        justify-self: end;
        text-align: end;
    }
    
    & dd {
        font-style: italic;
    }
}

@media print {
  * {
    text-wrap: balance;
  }

  a {
    text-decoration: none;
    color: inherit;
    display: flex;  
    align-items: center;
    justify-content: center;
    gap: 1em;
    font-weight: 250;
  }
}

img {
  width: 100%;
}

figure {
  margin: 0;
}

a {
}

.qrcode {
  width: 3cm;

  & .bg {
    fill: none;
  }
}

.squiggle {
  fill: none;
  stroke: color-mix(in oklch, oklch(var(--bg-lum) var(--bg-chroma) var(--bg-hue)), black 30%);
  stroke-width: 0.05em;
  stroke-linejoin: round;
}

@media screen {
  :root {
    font-size: 18px;
  }

  .print-only {
    display: none;
  }
  
  body {
    width: revert;
    height: revert;
    margin: 0;
    padding: 0.25rem;
  }

  header {
    font-size: 1rem;
    margin-bottom: 2rem;
  }

  main {
    grid-template-columns: 1fr;
    justify-items: center;
    & section {
      grid-column: 1;

      &.plain {
        display: none;
      }
    }
  }

  .qrcode {
    display: none;
  }
  
  dl.quotes {
    grid-template-columns: 1fr;

    & dt {
      text-align: start;
      justify-self: start;
    }

    & dd {
      text-align: end;
    }
  }
}