@layer reset, tokens, syntax-highlight-element, layout;

/* ==========================================================================
    RESET
  ========================================================================== */

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  body {
    margin: 0;
  }
}

/* ==========================================================================
    TOKENS
  ========================================================================== */

@layer tokens {
  :where(:root) {
    --spacing-0: 0rem;
    --spacing-0\.5: 0.125rem;
    --spacing-1: 0.25rem;
    --spacing-1\.5: 0.375rem;
    --spacing-2: 0.5rem;
    --spacing-2\.5: 0.625rem;
    --spacing-3: 0.75rem;
    --spacing-3\.5: 0.875rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-7: 1.75rem;
    --spacing-8: 2rem;
    --spacing-9: 2.25rem;
    --spacing-10: 2.5rem;
    --spacing-11: 2.75rem;
    --spacing-12: 3rem;
    --spacing-14: 3.5rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    --spacing-28: 7rem;
    --spacing-32: 8rem;

    --sizes-xs: 20rem;
    --sizes-sm: 24rem;
    --sizes-md: 28rem;
    --sizes-lg: 32rem;
    --sizes-xl: 36rem;
    --sizes-2xl: 42rem;
    --sizes-3xl: 48rem;
    --sizes-4xl: 56rem;
    --sizes-5xl: 64rem;
    --sizes-6xl: 72rem;
    --sizes-7xl: 80rem;
    --sizes-8xl: 90rem;
    --sizes-full: 100%;

    --fonts-sans: ui-sans-serif, "Segoe UI", system-ui, -apple-system, sans-serif;

    --fonts-mono:
      ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;

    --accent: light-dark(#c0c0b0, lightyellow);
    --canvas: light-dark(#ffffff, #242424);
    --canvas-text: light-dark(#242424, #ffffff);
    --button-face: light-dark(#f9f9f9, #1a1a1a);
    --button-face-muted: light-dark(#fdfdfd, #212121);
  }
}

/* ==========================================================================
    SYNTAX HIGHLIGHT
  ========================================================================== */

@layer syntax-highlight-element {
  syntax-highlight {
    --mono-bg: light-dark(#fdfdfd, #000000);
    --mono-fg: light-dark(#111111, #ffffff);
    --mono-comment: light-dark(#a7a7a7, #666666);
    --mono-constant: light-dark(#666666, #a7a7a7);
    --mono-entity: light-dark(#111111, #ffffff);
    --mono-entity-tag: light-dark(#666666, #a7a7a7);
    --mono-keyword: light-dark(#666666, #a7a7a7);
    --mono-string: light-dark(#666666, #a7a7a7);

    /*
    --mono-variable: light-dark(#a65e2b, #cb997e);
    --mono-deleted-bg: light-dark(#fce6e6, #37232b);
    --mono-deleted-text: light-dark(#a13f3f, #e28080);
    --mono-inserted-bg: light-dark(#e6f4e6, #1c3327);
    --mono-inserted-text: light-dark(#3f7d4f, #8fca9e);
    */

    font-family: var(--fonts-mono);
    font-size: smaller;
    font-weight: 500;
    line-height: 1.6;

    color: var(--mono-fg);
    background-color: var(--mono-bg);

    white-space: pre;
    word-spacing: normal;
    word-break: normal;
    word-wrap: normal;
    hyphens: none;
    tab-size: 2;

    overflow-inline: auto;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    overscroll-behavior-x: contain;
  }

  ::highlight(punctuation),
  ::highlight(number),
  ::highlight(atrule) {
    color: var(--mono-fg);
  }

  ::highlight(namespace) {
    opacity: 0.7;
  }

  ::highlight(comment),
  ::highlight(prolog),
  ::highlight(doctype),
  ::highlight(cdata) {
    color: var(--mono-comment);
  }

  ::highlight(constant),
  ::highlight(char),
  ::highlight(builtin),
  ::highlight(operator) {
    color: var(--mono-constant);
  }

  ::highlight(attr-name) {
    color: var(--mono-fg);
  }

  ::highlight(property),
  ::highlight(tag),
  ::highlight(boolean),
  ::highlight(symbol) {
    color: var(--mono-entity-tag);
  }

  ::highlight(entity),
  ::highlight(selector),
  ::highlight(class-name),
  ::highlight(function) {
    color: var(--mono-entity);
  }

  ::highlight(keyword),
  ::highlight(rule) {
    color: var(--mono-keyword);
  }

  ::highlight(string),
  ::highlight(attr-value) {
    color: var(--mono-string);
  }

  ::highlight(variable) {
    color: var(--mono-variable);
  }

  ::highlight(deleted) {
    color: var(--mono-deleted-text);
    background-color: var(--mono-deleted-bg);
  }

  ::highlight(inserted) {
    color: var(--mono-inserted-text);
    background-color: var(--mono-inserted-bg);
  }
}

/* ==========================================================================
    LAYOUT
  ========================================================================== */

@layer layout {
  /* ------------------------------------------------------------------------
      Global
    ------------------------------------------------------------------------ */

  :root {
    color-scheme: light dark;
    font-synthesis: none;
    text-rendering: optimizeLegibility;

    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  body {
    display: grid;
    min-block-size: 100dvh;

    font-family: var(--fonts-sans);
    font-weight: 400;
  }

  :focus-visible {
    outline-color: var(--accent);
    outline-offset: var(--spacing-0\.5);
  }

  :any-link {
    color: inherit;
    text-decoration-color: var(--accent);
    text-decoration-line: underline;
    text-underline-offset: var(--spacing-1);
  }

  :any-link:not(:is(:hover, :focus)) {
    text-decoration-color: color-mix(in srgb, currentColor, transparent 75%);
  }

  [hidden] {
    display: none;
  }

  dialog {
    opacity: 0;
    transform: scale(0.95);
    transition: 150ms ease allow-discrete;
    transition-property: opacity, transform, overlay, display;
    overscroll-behavior: contain;

    &:is([open]) {
      opacity: 1;
      transform: scale(1);

      @starting-style {
        opacity: 0;
        transform: scale(0.95);
      }
    }

    &::backdrop {
      background-color: rgba(0, 0, 0, 0);
      transition: 150ms ease allow-discrete;
      transition-property: background-color, overlay, display;

      overflow: hidden;
      overscroll-behavior: contain;
    }

    &:is([open])::backdrop {
      background-color: rgb(0 0 0 / 0.3);

      @starting-style {
        background-color: rgb(0 0 0 / 0);
      }
    }
  }

  .note {
    padding: 0.75rem 0.875rem;
    color: color-mix(in srgb, CanvasText 65%, transparent);
    background: color-mix(in srgb, CanvasText 4%, Canvas);
    border-radius: 0.6rem;
    font-size: 0.8rem;
    line-height: 1.5;
    width: fit-content;

    p {
      margin: 0;
    }
  }

  /* ------------------------------------------------------------------------
      Interactive controls
    ------------------------------------------------------------------------ */

  button,
  .button,
  [role="button"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    min-block-size: 2.5rem;
    padding: 0.4em 1em;
    border: 1px solid transparent;
    border-radius: 0.5rem;
    color: inherit;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    background: var(--button-face);
    text-wrap: nowrap;
    cursor: pointer;
    touch-action: manipulation;

    transition:
      border-color 0.2s ease,
      background-color 0.2s ease;
  }

  button:hover,
  .button:hover,
  [role="button"]:hover {
    border-color: var(--accent);
  }

  input,
  select,
  [contenteditable] {
    font-family: inherit;
    font-size: 1rem;
  }

  @supports (appearance: base-select) {
    select,
    ::picker(select) {
      appearance: base-select;
      align-items: center;
      min-height: 2.75rem;
      padding: unset;
      border-radius: 0.6rem;
      background: var(--button-face);
      border: 1px solid color-mix(in srgb, currentColor, transparent 87%);
    }

    select {
      border: none;
      button {
        display: flex;
        justify-content: space-between;
        width: 100%;
        margin: 0;
      }

      &::picker-icon {
        display: none;
      }
    }

    ::picker(select) {
      width: max-content;
      padding: 0.5rem;
    }

    option {
      padding: var(--spacing-2);
      color: currentColor;
      background: var(--button-face);
      border-radius: 0.25rem;
    }
  }

  code {
    padding: var(--spacing-0\.5) var(--spacing-1);
    border-radius: 0.25rem;
    color: light-dark(#111111, #ffffff);
    background-color: light-dark(#efefef, #000000);
    text-wrap: nowrap;
  }

  /* ------------------------------------------------------------------------
      Code examples
    ------------------------------------------------------------------------ */

  .copy-code {
    display: grid;
    margin-block: var(--spacing-4);

    > * {
      grid-area: 1 / 1;
    }

    syntax-highlight:not([content-selector="style"]),
    syntax-highlight:is([content-selector="style"]) style {
      padding: var(--spacing-4);
      border: 1px solid color-mix(in srgb, currentColor, transparent 87%);
      border-radius: 0.5rem;
    }

    syntax-highlight:is([content-selector="style"]) {
      display: grid;
    }

    syntax-highlight:is([content-selector="style"]) style {
      display: block;
      block-size: 400px;
      overflow: auto;
      outline: 0;
    }

    [role="button"] {
      align-self: start;
      justify-self: end;

      margin-block-start: var(--spacing-2);
      margin-inline-end: var(--spacing-2);
      opacity: 0;
      border-radius: calc(0.5rem - var(--spacing-2) / 2);
      font-size: small;
      background: color-mix(in srgb, var(--canvas) 88%, transparent);
      backdrop-filter: blur(8px);
    }
  }

  .copy-code:hover [role="button"],
  .copy-code:focus-within [role="button"] {
    opacity: 1;
  }

  /* ------------------------------------------------------------------------
      Site header
    ------------------------------------------------------------------------ */

  /* Scoped intentionally to the page header. */
  body > header {
    position: sticky;
    inset-block-start: 0;
    z-index: 1;

    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-5);
    padding: var(--spacing-6) var(--spacing-4);
    background-color: color-mix(in srgb, var(--canvas) 88%, transparent);
    backdrop-filter: blur(8px);
    container-type: inline-size;

    .brand {
      display: flex;
      align-items: center;
      gap: var(--spacing-2);

      margin: unset;

      font-weight: 700;
      letter-spacing: -0.01em;
      text-wrap: nowrap;
    }

    .brand > span,
    .byline {
      display: none;
    }

    .byline {
      color: var(--muted);
      font-size: 0.8rem;
      font-weight: 400;
    }

    .header-fields {
      display: flex;
      flex-wrap: wrap;
      gap: var(--spacing-3);
      font-size: 0.9rem;

      a {
        display: inline-flex;
        align-items: center;
        gap: var(--spacing-2);

        color: inherit;
        text-wrap: nowrap;
      }

      [aria-label]:has(svg) {
        aspect-ratio: 1;
        padding: var(--spacing-2);
      }

      a span {
        display: none;
      }
    }
  }

  @container (min-width: 400px) {
    body > header .brand > span {
      display: initial;
    }
  }

  @container (min-width: 520px) {
    body > header .byline,
    body > header .header-links a span {
      display: initial;
    }
  }

  /* ------------------------------------------------------------------------
      Main content
    ------------------------------------------------------------------------ */

  main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-10);

    inline-size: var(--sizes-full);
    max-inline-size: var(--sizes-4xl);

    margin-inline: auto;
    padding-inline: var(--spacing-4);
    padding-block-start: var(--spacing-12);
    padding-block-end: var(--spacing-24);
  }

  main p,
  main ul {
    color: color-mix(in srgb, var(--canvas-text) 75%, transparent);
  }

  main p,
  main ul {
    max-width: 60ch;
    line-height: 1.5;
    text-wrap: pretty;
  }

  main ul {
    padding-inline-start: var(--spacing-4);
  }

  main article {
    display: flex;
    flex-direction: column;
    align-self: stretch;
    gap: var(--spacing-10);
  }

  main article > section:has(section) {
    display: flex;
    flex-direction: inherit;
    gap: inherit;
  }

  main article section h3 {
    margin-block-start: unset;
  }

  /* ------------------------------------------------------------------------
      Playground
    ------------------------------------------------------------------------ */

  .playground {
    position: relative;
    padding: var(--spacing-6);
    border: 1px solid color-mix(in srgb, currentColor, transparent 88%);
    border-radius: 1rem;
    background:
      radial-gradient(
        circle at 10% 100%,
        color-mix(in srgb, var(--accent) 10%, transparent),
        transparent 45%
      ),
      color-mix(in srgb, var(--canvas-text) 2%, var(--canvas));
    box-shadow:
      0 1px 2px rgb(0 0 0 / 0.04),
      0 1rem 3rem rgb(0 0 0 / 0.05);
  }

  /* ------------------------------------------------------------------------
      Demo controls
    ------------------------------------------------------------------------ */

  main .control-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    flex-wrap: wrap;
    padding: var(--spacing-4);
    border: 1px solid color-mix(in srgb, currentColor, transparent 96%);
    border-radius: 0.5rem;
    background-color: color-mix(in srgb, currentColor, transparent 98%);

    button {
      border-color: color-mix(in srgb, currentColor, transparent 87%);
      font-size: 1rem;
    }

    output {
      margin-inline-start: auto;
      font-size: smaller;
    }
  }

  /* ------------------------------------------------------------------------
      Playground dialog
    ------------------------------------------------------------------------ */

  #tq-controls {
    inline-size: min(26rem, calc(100vw - 2rem));
    max-block-size: min(42rem, calc(100dvh - 2rem));
    overflow: auto;
    padding: 0;
    border: 1px solid color-mix(in srgb, CurrentColor 12%, transparent);
    border-radius: 1rem;
    box-shadow:
      0 1.5rem 4rem rgb(0 0 0 / 0.14),
      0 0.25rem 1rem rgb(0 0 0 / 0.08);
  }

  .playground-controls {
    display: grid;
    gap: var(--spacing-1\.5);

    header {
      display: flex;
      flex-direction: column;
      padding: 1rem;
      border-block-end: 1px solid color-mix(in srgb, CurrentColor 10%, transparent);

      [command="close"] {
        align-self: flex-end;
        margin-inline-end: -0.5rem;
        margin-block-start: -0.5rem;
        aspect-ratio: 1;
        padding: unset;
      }

      .eyebrow {
        font-size: smaller;
        margin-block-start: 0;
      }

      h2 {
        margin: 0.15rem 0 0.35rem;
        font-size: 1rem;
      }

      p:last-child {
        margin: 0;
        color: color-mix(in srgb, CanvasText 65%, transparent);
        font-size: 0.875rem;
      }
    }

    fieldset {
      display: grid;
      gap: 0.75rem;
      margin: 0;
      padding: 1rem;
      border: 0;
      border-block-end: 1px solid color-mix(in srgb, CurrentColor 10%, transparent);
    }

    legend {
      margin-block-end: 0.25rem;
      padding: 0;
      color: color-mix(in srgb, CurrentColor 55%, transparent);
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .note {
      margin: 1rem;
    }

    [command="show-modal"] {
      margin-inline: 1rem;
      margin-block-end: 1rem;
    }
  }

  /* ------------------------------------------------------------------------
      Playground fields
     ------------------------------------------------------------------------ */

  #visibleLimit {
    field-sizing: content;
  }

  .field {
    display: grid;
    gap: 0.4rem;
    font-size: 0.875rem;
    font-weight: 600;

    > span {
      color: color-mix(in srgb, CanvasText 75%, transparent);
    }

    select,
    input {
      box-sizing: border-box;
      inline-size: 100%;
      min-block-size: 2.5rem;
      padding-inline: 0.7rem;
      color: inherit;
      background: color-mix(in srgb, CanvasText 4%, Canvas);
      border: 1px solid color-mix(in srgb, CanvasText 15%, transparent);
      border-radius: 0.6rem;
      font-weight: normal;
    }

    &:has(input[type="number"]) {
      grid-template-columns: 1fr 5rem;
      align-items: center;

      > span {
        align-self: center;
      }

      input {
        inline-size: 5rem;
      }
    }
  }

  /* ------------------------------------------------------------------------
      Playground editor
     ------------------------------------------------------------------------ */

  .css-editor {
    border: 1px solid color-mix(in srgb, CanvasText 10%, transparent);
    border-radius: 1rem;
    max-width: calc(100% - 1rem - 6px);

    header {
      display: flex;
      align-items: center;
      margin-block-end: 1rem;
    }

    header h2 {
      margin: unset;
      font-size: smaller;
    }

    [command="close"] {
      margin-block-start: 1rem;
      width: stretch;
    }

    .copy-code {
      margin: unset;
      border-radius: inherit;
    }
  }

  .css-editor-meta {
    color: color-mix(in srgb, CanvasText 50%, transparent);
    font-size: 0.75rem;
    font-weight: 500;
  }

  /* ------------------------------------------------------------------------
      Footer
     ------------------------------------------------------------------------ */

  footer {
    inline-size: var(--sizes-full);
    margin-inline: auto;
    margin-block-start: auto;
    padding: var(--spacing-8) var(--spacing-4);
    text-align: center;
    font-size: 0.85rem;
    background: color-mix(in srgb, var(--canvas) 88%, transparent);

    p {
      margin: 0;
      margin-block-end: var(--spacing-2);
    }
  }
}