/*
 * United theme variables.
 *
 * Extracted from Bootswatch United (https://bootswatch.com/united/) — the
 * Ubuntu look: a warm orange primary on a clean, untinted white canvas
 * with neutral gray text.
 *
 * Ships a light default plus a `[data-theme="dark"]` dark variant (see the
 * dark block at the end of the mixin). Inherits Bulma defaults for radius /
 * shadow / spacing; only colors (primary / link / admonitions) are
 * customized.
 *
 * This file is compiled by `build.ts` into a single CSS artifact per theme
 * (the directory name is used as the theme name):
 *   - dist/<theme>/theme.min.css  (Bulma bundle + variables on :root)
 *
 * Downstream consumers can also `@use` this file with `with (...)` to
 * override individual values and run their own build.
 */

// --- scheme / text (United's canvas is pure white and its body text is a
// neutral gray #333; emit both at zero saturation so chrome stays neutral) ---
$scheme-h: 0 !default;
$scheme-s: 0% !default;
$text-h: 0 !default;
$text-s: 0% !default;

// --- primary / link (both Ubuntu orange #e95420; body links share the
// button colour, so link-on-scheme-l tracks link-l) ---
$primary-h: 16 !default;
$primary-s: 82% !default;
$primary-l: 52% !default;
$primary-invert-l: 100% !default;
$link-h: 16 !default;
$link-s: 82% !default;
$link-l: 52% !default;
$link-invert-l: 100% !default;
$link-on-scheme-l: $link-l !default;

// --- secondary (Bootswatch United $secondary $gray-500 #aea79f →
// hsl(32, 8%, 65%), a warm light neutral; see the "Choosing a theme's
// secondary" policy in themes-authoring.md). The base colour is injected into
// Bulma's colour map via $custom-colors (entry.scss). Bootswatch United draws
// #fff on .btn-secondary despite the light fill; pin invert-l to 100% to
// match that source choice rather than rely on Bulma's auto-contrast. White on
// this #aea79f fill is ~2.4:1 — below WCAG AA (3.0:1 for large text); an
// intentional source-fidelity exception, not an oversight. ---
$secondary-h: 32 !default;
$secondary-s: 8% !default;
$secondary-l: 65% !default;
$secondary-invert-l: 100% !default;
$custom-colors: ("secondary": (hsl($secondary-h, $secondary-s, $secondary-l))) !default;

// --- admonition palette (Pitfall 3: United draws #fff text on every
// saturated button fill, so pin invert-l to 100% instead of relying on the
// SCSS palette generator's default choice) ---
$info-h: 188 !default;
$info-s: 78% !default;
$info-l: 41% !default;
$info-invert-l: 100% !default;
$success-h: 129 !default;
$success-s: 53% !default;
$success-l: 46% !default;
$success-invert-l: 100% !default;
$warning-h: 41 !default;
$warning-s: 85% !default;
$warning-l: 59% !default;
$warning-invert-l: 100% !default;
$danger-h: 4 !default;
$danger-s: 74% !default;
$danger-l: 52% !default;
$danger-invert-l: 100% !default;

// --- dark (Ubuntu aubergine #772953; overrides Bulma's near-black default
// dark. L=31% is deep, so white text reads on the is-dark fill — pin
// dark-invert-l to 100%) ---
$dark-h: 328 !default;
$dark-s: 49% !default;
$dark-l: 31% !default;
$dark-invert-l: 100% !default;

// --- radius (matches Bulma's --bulma-radius default; United's 0.375rem is
// the same, so only declared for the Pitfall 6 control-radius pin) ---
$radius: 0.375rem !default;

@mixin variables {
  --bulma-scheme-h: #{$scheme-h};
  --bulma-scheme-s: #{$scheme-s};
  --bulma-text-h: #{$text-h};
  --bulma-text-s: #{$text-s};
  --bulma-primary-h: #{$primary-h};
  --bulma-primary-s: #{$primary-s};
  --bulma-primary-l: #{$primary-l};
  --bulma-primary-invert-l: #{$primary-invert-l};
  --bulma-secondary-invert-l: #{$secondary-invert-l};
  --bulma-link-h: #{$link-h};
  --bulma-link-s: #{$link-s};
  --bulma-link-l: #{$link-l};
  --bulma-link-invert-l: #{$link-invert-l};
  --bulma-link-on-scheme-l: #{$link-on-scheme-l};
  --bulma-info-h: #{$info-h};
  --bulma-info-s: #{$info-s};
  --bulma-info-l: #{$info-l};
  --bulma-info-invert-l: #{$info-invert-l};
  --bulma-success-h: #{$success-h};
  --bulma-success-s: #{$success-s};
  --bulma-success-l: #{$success-l};
  --bulma-success-invert-l: #{$success-invert-l};
  --bulma-warning-h: #{$warning-h};
  --bulma-warning-s: #{$warning-s};
  --bulma-warning-l: #{$warning-l};
  --bulma-warning-invert-l: #{$warning-invert-l};
  --bulma-danger-h: #{$danger-h};
  --bulma-danger-s: #{$danger-s};
  --bulma-danger-l: #{$danger-l};
  --bulma-danger-invert-l: #{$danger-invert-l};
  --bulma-dark-h: #{$dark-h};
  --bulma-dark-s: #{$dark-s};
  --bulma-dark-l: #{$dark-l};
  --bulma-dark-invert-l: #{$dark-invert-l};

  // Pitfall 6: pin every --bulma-control-* on the shared control selector
  // group so bare `.button` / `.input` / `.textarea` / `.select select` /
  // `.pagination-*` and their icons resolve padding, border, height, and
  // radius correctly. `.is-*` modifiers re-declare with higher
  // specificity, so per-modifier behaviour is preserved.
  .button,
  .control,
  .file-cta,
  .file-name,
  .input,
  .pagination,
  .pagination-ellipsis,
  .pagination-link,
  .pagination-next,
  .pagination-previous,
  .select,
  .select select,
  .textarea {
    --bulma-control-border-width: 1px;
    --bulma-control-height: 2.5em;
    --bulma-control-padding-vertical: calc(0.5em - 1px);
    --bulma-control-padding-horizontal: calc(0.75em - 1px);
    --bulma-control-radius: #{$radius};
  }

  // Pitfall 8: `--bulma-link-text` is set on :root via an hsl(var(...))
  // chain that can fall back to UA-default on `<a>`; pin literally.
  // United also underlines body link text (Bootstrap/Bootswatch convention;
  // Bulma's base `a` is `text-decoration: none`). The chrome reset below
  // strips the underline back off navigation / control components so only
  // genuine prose links are underlined.
  a {
    --bulma-link-text: hsl(#{$link-h}, #{$link-s}, #{$link-on-scheme-l});

    text-decoration: underline;
  }

  // Strip the body-link underline off navigation / control components whose
  // `<a>` children are chrome, not prose links. Same specificity (0,3,0 with
  // the `:root` prefix) as the `a` rule above but declared later, so it wins
  // the source-order tie. `.breadcrumb a` is intentionally NOT reset — its
  // links stay underlined. `.button.is-link` re-adds its own underline at
  // higher specificity below.
  .navbar-item,
  .navbar-link,
  .menu-list a,
  .pagination-previous,
  .pagination-next,
  .pagination-link,
  .pagination-ellipsis,
  .tabs a,
  .dropdown-item,
  .panel-block,
  .panel-tabs a,
  .card-footer-item,
  .button,
  .tag {
    text-decoration: none;
  }

  // Pitfall 14: `.breadcrumb a` reads `--bulma-breadcrumb-item-color`
  // (= var(--bulma-link-text)), whose hsl(var(), var(), var()) chain fails
  // at the child and drops the brand colour to the UA default. Pin the
  // literal link colour on the parent `.breadcrumb` (base colour only — a
  // hover lightness cannot be hard-coded generically and a base-only pin
  // does not regress hover).
  // Bootstrap-derived universal default #4: the active (current-page)
  // breadcrumb item is muted grey, not a link colour.
  // `--bulma-breadcrumb-item-active-color` chains through
  // `--bulma-link-text-active` (a compound hsl(var(), var(), calc(var()))
  // expression on :root) the same way Pitfall 8/14 do — pin it literally.
  .breadcrumb {
    --bulma-breadcrumb-item-color: hsl(#{$link-h}, #{$link-s}, #{$link-on-scheme-l});
    --bulma-breadcrumb-item-active-color: hsl(#{$scheme-h}, #{$scheme-s}, 45%);
  }

  // The current-page item (`.breadcrumb .is-active a`) is not a navigable
  // link, so strip the prose-link underline back off it — it reads as plain
  // text. Genuine ancestor links in the trail keep their underline.
  .breadcrumb .is-active a {
    text-decoration: none;
  }

  // Pitfall 4: burger icon on .navbar.is-primary follows primary-invert.
  .navbar.is-primary {
    --bulma-navbar-burger-color: var(--bulma-primary-invert);
  }

  // Bootstrap-derived universal default #1: `.btn-link` maps to Bulma's
  // native `.button.is-ghost` (a transparent, link-coloured text button),
  // not `.is-link` — which stays Bulma's solid semantic colour and is
  // intentionally left un-restyled here even though United's link and
  // primary share the same hue (a valid, expected outcome, not a defect).

  // Pitfall 9: pin <use>-pattern SVG icons inside .panel-icon to 1em so
  // they sit in the icon slot instead of overflowing rightward.
  .panel-icon svg {
    width: 1em;
    height: 1em;
  }

  .panel-icon svg use {
    width: 100%;
    height: 100%;
  }

  // Pitfall 10: --bulma-shadow's hsl(var(--bulma-shadow-h), ...) chain
  // on :root fails to resolve at the shadowed containers (.box / .card /
  // .panel); they end up with neither the drop shadow nor the inner 1px
  // ring. Pin a fully resolved two-stop shadow on those selectors. United's
  // neutral scheme (s=0) makes this a pure-gray shadow. `.dropdown` uses a
  // two-level indirection (parent registers `--bulma-dropdown-content-
  // shadow: var(--bulma-shadow)`, child `.dropdown-content` reads it), so
  // per Pitfall 1's eager-substitution behaviour, the pin must go on the
  // parent `.dropdown` selector.
  .dropdown,
  .modal-card-head,
  .panel {
    --bulma-shadow:
      0 0.5em 1em -0.125em hsla(#{$scheme-h}, #{$scheme-s}, 4%, 10%),
      0 0 0 1px hsla(#{$scheme-h}, #{$scheme-s}, 4%, 2%);
  }

  // Bootstrap-derived universal default #7: card / box get a 1px border and
  // no drop shadow (Bootstrap `.card`) — replaces, rather than stacks on,
  // the Pitfall-10 shadow pin above. Real `border` → bare Sass vars.
  .box,
  .card {
    --bulma-shadow: none;

    border: 1px solid hsl($scheme-h, $scheme-s, 87%);
  }

  // Pitfall 11: separator borders on `.card-footer` / `.panel-block` /
  // `.panel-tabs` / `.dropdown-divider` chain through --bulma-border-weak,
  // and `.tabs a` / `.tabs ul` chain through --bulma-border. Both share the
  // same `hsl(var(--bulma-scheme-h), var(--bulma-scheme-s), var(...-l))`
  // shape on :root and fail to resolve at the descendants. Pin literal hsl
  // on the parents; also pin --bulma-card-header-shadow on .card.
  .card,
  .dropdown,
  .panel {
    --bulma-border-weak: hsl(#{$scheme-h}, #{$scheme-s}, 93%);
  }

  .tabs {
    --bulma-border: hsl(#{$scheme-h}, #{$scheme-s}, 86%);

    // Same Pitfall 12 shape: Bulma registers
    // `--bulma-tabs-boxed-link-active-background-color: var(--bulma-scheme-main)`
    // on `.tabs`; the inner hsl(var(), var(), var()) chain fails at the
    // descendant `.tabs.is-boxed li.is-active a`, leaving its background
    // transparent so the ul's bottom border bleeds through. Pin literal hsl
    // matching Bulma's light-mode `--bulma-scheme-main-l` (100%).
    --bulma-tabs-boxed-link-active-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 100%);
  }

  .card {
    --bulma-card-header-shadow: 0 0.125em 0.25em hsla(#{$scheme-h}, #{$scheme-s}, 4%, 10%);

    // Pitfall 13: `--bulma-card-radius` is Bulma's SCSS-default 0.75rem,
    // hardcoded in card.scss and NOT tied to any --bulma-radius token, and
    // re-declared directly on `.card`. Scope the override to `.card` so it
    // wins on specificity (0,2,0 vs 0,1,0).
    --bulma-card-radius: #{$radius};
  }

  // Same class of chain failure as Pitfall 11/12: `.modal` registers
  // `--bulma-modal-card-{head,body,foot}-background-color:
  // var(--bulma-scheme-{main,main-bis})`, whose compound hsl(var(), var(),
  // var()) fails at the descendant `.modal-card-{head,body,foot}` and leaves
  // the backgrounds transparent. Pin literal hsl on the parent `.modal`.
  // 100% / 98% match Bulma's light-mode `--bulma-scheme-main-l` and
  // `--bulma-scheme-main-bis-l`.
  .modal {
    --bulma-modal-card-head-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 100%);
    --bulma-modal-card-body-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 100%);
    --bulma-modal-card-foot-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 98%);
  }

  // Pitfall 13 (continued): Bulma's `.card-image:first-child img` /
  // `:last-child img` rule only rounds `<img>` children. Mirror it for
  // background-styled `<figure>` children so gradient placeholders stay
  // clipped to the card radius.
  .card-image:first-child > figure {
    border-start-start-radius: var(--bulma-card-radius);
    border-start-end-radius: var(--bulma-card-radius);
  }

  .card-image:last-child > figure {
    border-end-start-radius: var(--bulma-card-radius);
    border-end-end-radius: var(--bulma-card-radius);
  }

  // Widen the active tab's underline from Bulma's 1px to 3px so it reads as
  // a clear accent under plain `.tabs`. Under `.tabs.is-boxed`, Bulma sets
  // `border-bottom-color: transparent !important` on the active tab, so this
  // stays invisible there. Cancel the compensating margin so the row does
  // not shift. Exclude `.is-toggle` (its active tab has an all-four border).
  .tabs:not(.is-toggle) li.is-active a {
    border-bottom-width: 3px;
    margin-bottom: -3px;
  }

  // Bulma registers `--bulma-code` on :root as the danger/red colour, so
  // inline <code> reads as an error state and clashes with the theme tone.
  // Repoint text and background into the brand primary hue: a deep primary
  // tone for the text (L=25%) over a pale primary-hued chip (L=94%). Scope
  // to the `code` selector (0,1,1) so both win over Bulma's :root
  // registration regardless of load order.
  code {
    --bulma-code: hsl(#{$primary-h}, #{$primary-s}, 25%);
    --bulma-code-background: hsl(#{$primary-h}, #{$primary-s}, 94%);
  }

  // --- Bootstrap-derived universal defaults ---

  // #2: joined pagination. Bootstrap page numbers are one segmented set
  // (adjacent borders overlap, only outer corners rounded). `.is-rounded`
  // opts out.
  .pagination:not(.is-rounded) .pagination-list {
    .pagination-link,
    .pagination-ellipsis {
      margin: 0;
      border-radius: 0;
    }

    li:not(:first-child) .pagination-link,
    li:not(:first-child) .pagination-ellipsis {
      margin-inline-start: -1px;
    }

    li:first-child :is(.pagination-link, .pagination-ellipsis) {
      border-start-start-radius: #{$radius};
      border-end-start-radius: #{$radius};
    }

    li:last-child :is(.pagination-link, .pagination-ellipsis) {
      border-start-end-radius: #{$radius};
      border-end-end-radius: #{$radius};
    }
  }

  // #5: checkbox / radio = primary fill + white glyph (Bootstrap
  // `.form-check-input`; no Bulma token — direct restyle of the native
  // input; real `background-color` → bare Sass vars). `appearance: none`
  // removes the native focus outline, so restore a `:focus-visible` ring.
  input[type="checkbox"],
  input[type="radio"] {
    width: 1em;
    height: 1em;
    appearance: none;
    vertical-align: -0.125em;
    background-color: transparent;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    border: 1px solid hsl($scheme-h, $scheme-s, 70%);
  }

  input[type="checkbox"] {
    border-radius: 0.25em;
  }

  input[type="radio"] {
    border-radius: 50%;
  }

  input[type="checkbox"]:checked,
  input[type="checkbox"]:indeterminate,
  input[type="radio"]:checked {
    background-color: hsl($primary-h, $primary-s, $primary-l);
    border-color: hsl($primary-h, $primary-s, $primary-l);
  }

  input[type="checkbox"]:focus-visible,
  input[type="radio"]:focus-visible {
    outline: 2px solid hsl($primary-h, $primary-s, $primary-l);
    outline-offset: 2px;
  }

  input[type="checkbox"]:disabled,
  input[type="radio"]:disabled {
    opacity: 0.5;
  }

  input[type="checkbox"]:checked {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='m6 10 3 3 6-6'/%3e%3c/svg%3e");
  }

  // `appearance: none` makes an indeterminate checkbox otherwise render
  // identically to an unchecked one; give it the same primary fill as
  // :checked (above) plus a dash glyph.
  input[type="checkbox"]:indeterminate {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10h8'/%3e%3c/svg%3e");
  }

  input[type="radio"]:checked {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='2' fill='%23fff'/%3e%3c/svg%3e");
  }

  // #6: control right-icon follows the input's state colour (Bootstrap
  // colours its validation icon; Bulma leaves it a fixed muted grey; no
  // token — direct, per state, bare Sass vars). Left icon stays neutral.
  .control.has-icons-right .input.is-primary ~ .icon.is-right {
    color: hsl($primary-h, $primary-s, $primary-l);
  }

  .control.has-icons-right .input.is-link ~ .icon.is-right {
    color: hsl($link-h, $link-s, $link-l);
  }

  .control.has-icons-right .input.is-info ~ .icon.is-right {
    color: hsl($info-h, $info-s, $info-l);
  }

  .control.has-icons-right .input.is-success ~ .icon.is-right {
    color: hsl($success-h, $success-s, $success-l);
  }

  .control.has-icons-right .input.is-warning ~ .icon.is-right {
    color: hsl($warning-h, $warning-s, $warning-l);
  }

  .control.has-icons-right .input.is-danger ~ .icon.is-right {
    color: hsl($danger-h, $danger-s, $danger-l);
  }

  // --- Dark mode (Bulma neutral dark canvas + brand accents; driven by
  // [data-theme="dark"]) ---
  // united pins no scheme/text L, so Bulma's own [data-theme=dark] theme sets
  // the canvas; only the light-only literal pins above need dark counterparts.
  // `&` is :root, so this compiles to `:root[data-theme="dark"] …`.
  &[data-theme="dark"] {
    .dropdown,
    .modal-card-head,
    .panel {
      --bulma-shadow:
        0 0.5em 1em -0.125em hsl(0deg 0% 0% / 40%),
        0 0 0 1px hsl(0deg 0% 100% / 10%);
    }

    .box,
    .card {
      border-color: hsl($scheme-h, $scheme-s, 28%);
    }

    input[type="checkbox"],
    input[type="radio"] {
      border-color: hsl($scheme-h, $scheme-s, 42%);
    }

    .card,
    .dropdown,
    .panel {
      --bulma-border-weak: hsl(#{$scheme-h}, #{$scheme-s}, 21%);
    }

    .tabs {
      --bulma-border: hsl(#{$scheme-h}, #{$scheme-s}, 24%);
      --bulma-tabs-boxed-link-active-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 9%);
    }

    .card {
      --bulma-card-header-shadow: 0 0.125em 0.25em hsl(0deg 0% 0% / 30%);
    }

    .modal {
      --bulma-modal-card-head-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 9%);
      --bulma-modal-card-body-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 9%);
      --bulma-modal-card-foot-background-color: hsl(#{$scheme-h}, #{$scheme-s}, 11%);
    }

    code {
      --bulma-code: hsl(#{$primary-h}, #{$primary-s}, 78%);
      --bulma-code-background: hsl(#{$primary-h}, #{$primary-s}, 16%);
    }

    .breadcrumb {
      --bulma-breadcrumb-item-active-color: hsl(#{$scheme-h}, #{$scheme-s}, 62%);
    }
  }
}