fizzy/app/assets/stylesheets/house.css

/* Colors */
:root {
  /* Named color values */
  --house-md-black: 0% 0 0;
  --house-md-white: 100% 0 0;
  --house-md-gray-light: 96% 0.005 96;
  --house-md-gray: 92% 0.005 96;
  --house-md-gray-dark: 75% 0.005 96;
  --house-md-blue: 54% 0.23 255;
  --house-md-blue-light: 95% 0.03 255;
  --house-md-blue-dark: 80% 0.08 255;
  --house-md-orange: 70% 0.2 44;
  --house-md-red: 51% 0.2 31;
  --house-md-green: 65.59% 0.234 142.49;
  --house-md-always-black: 0% 0 0;

  /* Abstractions */
  --house-color-negative: oklch(var(--house-md-red));
  --house-color-positive: oklch(var(--house-md-green));
  --house-color-bg: oklch(var(--house-md-white));
  --house-color-ink: oklch(var(--house-md-black));
  --house-color-ink-reversed: oklch(var(--house-md-white));
  --house-color-link: oklch(var(--house-md-blue));
  --house-color-subtle-light: oklch(var(--house-md-gray-light));
  --house-color-subtle: oklch(var(--house-md-gray));
  --house-color-subtle-dark: oklch(var(--house-md-gray-dark));
  --house-color-selected: oklch(var(--house-md-blue-light));
  --house-color-selected-dark: oklch(var(--house-md-blue-dark));
  --house-color-alert: oklch(var(--house-md-orange));
  --house-color-always-black: oklch(var(--house-md-always-black));

  /* Redefine named color values for dark mode */
  @media (prefers-color-scheme: dark) {
    --house-md-black: 100% 0 0;
    --house-md-white: 0% 0 0;
    --house-md-gray: 25.2% 0 0;
    --house-md-gray-dark: 30.12% 0 0;
    --house-md-gray-darker: 44.95% 0 0;
    --house-md-blue: 72.25% 0.16 248;
    --house-md-blue-light: 28.11% 0.053 248;
    --house-md-blue-dark: 42.25% 0.07 248;
    --house-md-red: 73.8% 0.184 29.18;
    --house-md-green: 75% 0.21 141.89;
  }
}

/* Base styles */
:is(house-md-editor, house-md-toolbar) {
}

a:not([class]) {
  color: var(--house-color-link);
  text-decoration-skip-ink: auto;
}

:is(a, button, input, textarea) {
  --outline-size: max(2px, 0.08em);
  --outline-style: solid;
  --house-outline-color: currentColor;

  caret-color: var(--house-color-link);

  &:focus {
    outline: var(--outline-size) var(--outline-style) var(--house-outline-color);
    outline-offset: var(--outline-offset, var(--outline-size));
  }

  &:focus-visible {
    outline: var(--outline-size) var(--outline-style) var(--house-outline-color);
    outline-offset: var(--outline-offset, var(--outline-size));
  }

  &:focus:not(:focus-visible) {
    outline: none;
  }

  ::selection {
    background-color: var(--house-color-selected);
  }
}

/* Editor */
house-md {
  display: flex;
  flex-direction: column;
  flex-grow: 1;

  &:invalid {
    border: var(--house-color-negative) 2px solid;
  }
}

/* Toolbar */
house-md-toolbar {
  background-color: inherit;
  border: 1px solid currentColor;
  border-radius: 0.5em;
  color: currentColor;
  display: inline-flex;
  font-size: inherit;
  padding: 0.2em;

  button, label {
    aspect-ratio: 4/3;
    appearance: none;
    background-color: transparent;
    block-size: 2em;
    border: none;
    border-radius: 0.5em;
    color: currentColor;
    cursor: pointer;
    display: grid;
    font-size: inherit;
    inline-size: auto;
    place-items: center;
    transition: background-color 300ms ease;

    svg {
      -webkit-touch-callout: none;
      block-size: 0.9em;
      fill: currentColor;
      grid-area: 1/1;
      inline-size: auto;
      user-select: none;
    }

    &:is(:focus, :hover) {
      background-color: var(--house-color-subtle);
    }

    &:is(:active) {
      background-color: var(--house-color-selected);
    }
  }
}

/* Markdown Content */
.house-md-content {
  caret-color: var(--color-link);
  flex-grow: 1;
  font-family: var(--font-sans);
  min-block-size: 50dvh;
  text-align: left;
  white-space: break-spaces;
  padding: 1rem;

  &.house-md-content-empty::before {
    content: attr(placeholder);
    color: var(--house-color-ink);
    opacity: 0.5;
    pointer-events: none;
    display: block;
  }

  &:active, &:focus{
    border:none;
    outline:none;
  }

  :is(.h1, .h2, .h3, .h4, .h5, .h6) {
    display: inline-inblock;
    font-weight: 600;
    margin-block: 0;
  }

  .h1 {
    font-size: 2em;
  }

  .h2 {
    font-size: 1.5em;
  }

  .h3 {
    font-size: 1.17em;
  }

  .h4 {
    font-size: 1em;
  }

  .h5 {
    font-size: 0.83em;
  }

  .h6 {
    font-size: 0.67em;
  }

  .link, .img {
    color: var(--house-color-link);
    text-decoration: underline;
  }

  .hr {
    border-color: var(--color-house-subtle-dark);
    border-style: solid none none;
    margin: 2lh auto;
  }

  .code {
    font-family: ui-monospace, monospace;
    font-weight: 600;
    font-size: 0.85em;
  }

  .quote {
    font-style: italic;
    margin: 0 3ch;
  }

  .quote, .ol-li, .ul-li {
    padding-left: 1em;
  }

  .comment {
    color: var(--color-house-positive);
  }

  mark {
    background-color: rgba(241, 241, 26, 0.678);
  }
}

/* Uploads */
house-md-upload {
  border-radius: 0.5em;
  margin-block: 0.5ex;
  position: relative;

  &[status="failed"] {
    background-color: var(--house-color-negative);
    color: var(--house-color-ink-reversed);
    font-weight: bold;
    padding: 0.5em;
  }
}

.md-close {
  appearance: none;
  display: none;
  inline-size: 1em;
  block-size: 1em;
  border: none;
  outline: none;
  background-color: transparent;
  position: absolute;
  inset: 0.5em 0.5em auto auto;
  cursor: pointer;

  house-md-upload[status="failed"] & {
    color: var(--house-color-ink-reversed);
    display: inline-block;
  }

  &::before {
    content: '×';
    color: var(--house-color-ink-reversed);
    font-size: 24px;
    font-weight: bold;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
}

.md-file {
  font-weight: normal;

  house-md-upload[status="complete"] & {
    color: var(--house-color-positive);
  }
}

.md-progress-bar {
  -webkit-appearance: none;
  appearance: none;
  background-color: var(--house-color-subtle);
  border-radius: 0.5em;
  block-size: 1ex;
  display: block;
  inline-size: 100%;
  line-height: inherit;
  margin: 0;

  house-md-upload[status="failed"] & ,
  house-md-upload[status="complete"] &{
    display: none;
  }

  &::-webkit-progress-bar {
    border-radius: 0.5em;
    background-color: var(--house-color-subtle);
  }

  &::-webkit-progress-inner-element {
    border-radius: 0.5em;
  }

  &::-webkit-progress-value {
    border-radius: 0.5em;
    background-color: var(--house-color-positive);
  }

  &::-moz-progress-bar {
    border-radius: 0.5em;
    background-color: var(--house-color-positive);
  }
}