/* TreeTree2 skin for Material for MkDocs.
   Tokens mirror t2-site/site/src/styles/variables.scss and
   stem-talent-development/reader/_extensions/t2-book/system/tokens.typ.
   Only CSS variables and small selectors: no plugin dependency. */

:root {
  --t2-navy: #060038;
  --t2-heading: var(--t2-navy);
  --t2-link: var(--t2-teal);
  --t2-teal: #0080a7;
  --t2-orange: #f9835f;
  --t2-red: #e43f5a;
  --t2-paper: #f8f8f8;
  --t2-white: #ffffff;
  --t2-ink: #15152a;
  --t2-muted: #6d6a80;
  --t2-pale-blue: #e8f4f7;
  --t2-pale-orange: #fff0ea;
  --t2-pale-red: #fdecef;
  --t2-border-soft: rgba(6, 0, 56, 0.1);
  --t2-shadow-soft: 0 1px 2px rgba(6, 0, 56, 0.06);

  /* Material reads these when theme.font is false. */
  --md-text-font: "Poppins";
  --md-code-font: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

/* Light scheme "t2": navy chrome, teal links, ink text on white. */
[data-md-color-scheme="t2"] {
  --md-hue: 246;

  --md-primary-fg-color: var(--t2-navy);
  --md-primary-fg-color--light: #2a2560;
  --md-primary-fg-color--dark: #03001f;
  --md-primary-bg-color: var(--t2-white);
  --md-primary-bg-color--light: rgba(255, 255, 255, 0.72);

  --md-accent-fg-color: var(--t2-heading);
  --md-accent-fg-color--transparent: rgba(6, 0, 56, 0.08);
  --md-accent-bg-color: var(--t2-white);
  --md-accent-bg-color--light: rgba(255, 255, 255, 0.72);

  --md-default-fg-color: var(--t2-ink);
  --md-default-fg-color--light: var(--t2-muted);
  --md-default-fg-color--lighter: rgba(21, 21, 42, 0.38);
  --md-default-fg-color--lightest: rgba(21, 21, 42, 0.08);
  --md-default-bg-color: var(--t2-white);
  --md-default-bg-color--light: rgba(255, 255, 255, 0.7);
  --md-default-bg-color--lighter: rgba(255, 255, 255, 0.3);
  --md-default-bg-color--lightest: rgba(255, 255, 255, 0.12);

  --md-typeset-color: var(--t2-ink);
  --md-typeset-a-color: var(--t2-link);
  --md-typeset-mark-color: var(--t2-pale-orange);
  --md-typeset-table-color: var(--t2-border-soft);
  --md-typeset-table-color--light: rgba(6, 0, 56, 0.04);

  --md-code-fg-color: var(--t2-ink);
  --md-code-bg-color: #f3f6f8;

  --md-admonition-fg-color: var(--t2-ink);
  --md-admonition-bg-color: var(--t2-white);

  --md-footer-fg-color: var(--t2-white);
  --md-footer-fg-color--light: rgba(255, 255, 255, 0.7);
  --md-footer-fg-color--lighter: rgba(255, 255, 255, 0.45);
  --md-footer-bg-color: var(--t2-navy);
  --md-footer-bg-color--dark: #03001f;

  --md-shadow-z1: var(--t2-shadow-soft);
  --md-shadow-z2: 0 4px 10px rgba(6, 0, 56, 0.12), 0 0 1px rgba(6, 0, 56, 0.2);
  --md-shadow-z3: 0 4px 10px rgba(6, 0, 56, 0.2), 0 0 1px rgba(6, 0, 56, 0.3);
}

/* Keep Material's slate component/syntax colours; adapt our brand surfaces too. */
[data-md-color-scheme="slate"] {
  --md-hue: 246;
  --t2-heading: #eeedf8;
  --t2-link: #73d3eb;
  --t2-paper: #29283c;
  --t2-pale-blue: #173640;
  --t2-pale-orange: #443028;
  --t2-pale-red: #422934;
  --t2-border-soft: rgba(238, 237, 248, 0.18);
  --md-primary-fg-color: var(--t2-navy);
  --md-primary-bg-color: var(--t2-white);
  --md-primary-bg-color--light: rgba(255, 255, 255, 0.72);
  --md-accent-fg-color: var(--t2-link);
  --md-accent-fg-color--transparent: rgba(115, 211, 235, 0.12);
  --md-typeset-a-color: var(--t2-link);
  --md-typeset-mark-color: var(--t2-pale-orange);
  --md-footer-bg-color: var(--t2-navy);
  --md-footer-bg-color--dark: #03001f;
}

/* Typography: Poppins for everything on screen, as on treetree2.org. */
.md-typeset {
  font-size: 0.8rem;
  line-height: 1.65;
}
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  color: var(--t2-heading);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.md-typeset h1 {
  font-weight: 700;
}
.md-typeset a {
  text-decoration-color: rgba(0, 128, 167, 0.35);
  text-underline-offset: 0.15em;
}
.md-typeset a:hover,
.md-typeset a:focus {
  text-decoration-color: currentColor;
}
.md-typeset code {
  border-radius: 4px;
}

/* Header: wordmark instead of the square logo slot; hide the duplicate title. */
.md-header__button.md-logo {
  padding: 0.4rem 0.6rem 0.4rem 0;
}
.md-header__button.md-logo img {
  height: 1.05rem;
  width: auto;
}
.md-header__title {
  font-weight: 500;
  margin-left: 0;
}
.md-header {
  box-shadow: none;
}
.md-tabs {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.md-tabs__link {
  font-weight: 500;
}
.md-tabs__link--active,
.md-tabs__link:hover {
  color: var(--t2-white);
}

/* Threshold strip (STR-01): teal, orange, red in equal thirds, half width,
   left-aligned, directly under the header chrome, as on the site and emails. */
.t2-strip {
  position: relative;
  z-index: 4; /* allow the edition badge to sit above the tabs */
  background-color: var(--md-primary-fg-color);
}
.t2-strip__row {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  min-height: 4px;
}
.t2-strip__bar {
  height: 4px;
  width: 50%;
  max-width: 30.5rem;
  flex: 0 0 auto;
  align-self: flex-end;
  background: linear-gradient(
    to right,
    var(--t2-teal) 0 33.34%,
    var(--t2-orange) 33.34% 66.67%,
    var(--t2-red) 66.67% 100%
  );
}

/* Edition badge: eyebrow grammar from the brand system, right of the strip. */
.t2-edition {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
  /* Desktop: sits in the tabs row, right-aligned, so the band stays 4px. */
  position: absolute;
  right: 0.6rem;
  bottom: 0.95rem;
}
.t2-edition::before {
  content: "";
  display: inline-block;
  width: 0.35rem;
  height: 0.35rem;
  margin-right: 0.35rem;
  background: var(--t2-orange);
  vertical-align: 0.02em;
}

/* Mobile keeps the wordmark: show the logo and drop the site-name topic,
   so the page title still slides in on scroll. */
@media screen and (max-width: 76.234375em) {
  .md-header__button.md-logo {
    display: block;
    order: -1; /* after the menu button, before the title */
    margin: 0.2rem 0;
    padding: 0.4rem 0.4rem 0.4rem 0;
  }
  .md-header__button[for="__drawer"] {
    order: -2;
  }
  .md-header__button.md-logo img {
    height: 0.9rem;
  }
  .md-header__title {
    margin-left: 0.2rem;
  }
  .md-header__topic:first-child {
    visibility: hidden;
  }
  .md-header__title--active .md-header__topic + .md-header__topic {
    visibility: visible;
  }
  /* No tabs row on mobile: the badge flows in the band instead. */
  .t2-edition {
    position: static;
    padding: 0.3rem 0.8rem 0.3rem 0;
  }
}

/* Sidebar navigation. */
.md-nav__item .md-nav__link--active,
.md-nav__link:focus,
.md-nav__link:hover {
  color: var(--t2-link);
}
.md-nav__title {
  color: var(--t2-heading);
}

/* Search. */
.md-search__form {
  background-color: rgba(255, 255, 255, 0.12);
}
.md-search__input::placeholder,
.md-search__input + .md-search__icon {
  color: rgba(255, 255, 255, 0.72);
}

/* Admonitions follow the brand colour grammar (t2-design D002/D003):
   teal = information (note, info, abstract), orange = tip, red = warning or danger.
   Other admonition types get a neutral navy treatment rather than a forced meaning.
   Panels: pale tint title, 1px soft border, 3px top rule in the semantic colour. */
.md-typeset .admonition,
.md-typeset details {
  border-width: 1px;
  border-top-width: 3px;
  border-color: var(--t2-border-soft);
  box-shadow: none;
  font-size: 0.72rem;
}
.md-typeset .admonition-title,
.md-typeset summary {
  font-weight: 600;
  color: var(--t2-heading);
}

.md-typeset .admonition.note, .md-typeset details.note,
.md-typeset .admonition.info, .md-typeset details.info,
.md-typeset .admonition.abstract, .md-typeset details.abstract {
  border-top-color: var(--t2-link);
}
.md-typeset .note > .admonition-title, .md-typeset .note > summary,
.md-typeset .info > .admonition-title, .md-typeset .info > summary,
.md-typeset .abstract > .admonition-title, .md-typeset .abstract > summary {
  background-color: var(--t2-pale-blue);
}
.md-typeset .note > .admonition-title::before, .md-typeset .note > summary::before,
.md-typeset .info > .admonition-title::before, .md-typeset .info > summary::before,
.md-typeset .abstract > .admonition-title::before, .md-typeset .abstract > summary::before {
  background-color: var(--t2-link);
}

.md-typeset .admonition.tip, .md-typeset details.tip {
  border-top-color: var(--t2-orange);
}
.md-typeset .tip > .admonition-title, .md-typeset .tip > summary {
  background-color: var(--t2-pale-orange);
}
.md-typeset .tip > .admonition-title::before, .md-typeset .tip > summary::before {
  background-color: var(--t2-orange);
}

/* Types outside the grammar stay neutral: navy rule, paper title, navy icon. */
.md-typeset .admonition.success, .md-typeset details.success,
.md-typeset .admonition.quote, .md-typeset details.quote,
.md-typeset .admonition.example, .md-typeset details.example,
.md-typeset .admonition.question, .md-typeset details.question {
  border-top-color: var(--t2-heading);
}
.md-typeset .success > .admonition-title, .md-typeset .success > summary,
.md-typeset .quote > .admonition-title, .md-typeset .quote > summary,
.md-typeset .example > .admonition-title, .md-typeset .example > summary,
.md-typeset .question > .admonition-title, .md-typeset .question > summary {
  background-color: var(--t2-paper);
}
.md-typeset .success > .admonition-title::before, .md-typeset .success > summary::before,
.md-typeset .quote > .admonition-title::before, .md-typeset .quote > summary::before,
.md-typeset .example > .admonition-title::before, .md-typeset .example > summary::before,
.md-typeset .question > .admonition-title::before, .md-typeset .question > summary::before {
  background-color: var(--t2-heading);
}

.md-typeset .admonition.warning, .md-typeset details.warning,
.md-typeset .admonition.danger, .md-typeset details.danger,
.md-typeset .admonition.failure, .md-typeset details.failure,
.md-typeset .admonition.bug, .md-typeset details.bug {
  border-top-color: var(--t2-red);
}
.md-typeset .warning > .admonition-title, .md-typeset .warning > summary,
.md-typeset .danger > .admonition-title, .md-typeset .danger > summary,
.md-typeset .failure > .admonition-title, .md-typeset .failure > summary,
.md-typeset .bug > .admonition-title, .md-typeset .bug > summary {
  background-color: var(--t2-pale-red);
}
.md-typeset .warning > .admonition-title::before, .md-typeset .warning > summary::before,
.md-typeset .danger > .admonition-title::before, .md-typeset .danger > summary::before,
.md-typeset .failure > .admonition-title::before, .md-typeset .failure > summary::before,
.md-typeset .bug > .admonition-title::before, .md-typeset .bug > summary::before {
  background-color: var(--t2-red);
}

/* Tables and content tabs. */
.md-typeset table:not([class]) {
  border: 1px solid var(--t2-border-soft);
  border-radius: 6px;
  font-size: 0.7rem;
}
.md-typeset table:not([class]) th {
  background-color: var(--t2-paper);
  color: var(--t2-heading);
  font-weight: 600;
}
.md-typeset .tabbed-labels > label {
  font-weight: 500;
}
.md-typeset .tabbed-set > input:checked + label {
  color: var(--t2-heading);
  border-color: var(--t2-heading);
}

/* Footer. */
.md-footer-meta {
  font-size: 0.6rem;
}
.md-copyright {
  color: rgba(255, 255, 255, 0.7);
}
.md-copyright__highlight {
  color: var(--t2-white);
}

/* Headings that are links stay navy; the teal underline is the affordance. */
.md-typeset h1 a,
.md-typeset h2 a,
.md-typeset h3 a,
.md-typeset h4 a {
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid rgba(0, 128, 167, 0.35);
}
.md-typeset h1 a:hover,
.md-typeset h2 a:hover,
.md-typeset h3 a:hover,
.md-typeset h4 a:hover {
  color: var(--t2-link);
  border-bottom-color: var(--t2-link);
}
.md-typeset .headerlink {
  border-bottom: 0;
}

/* The expanded search box uses a content surface, not the navy header. */
[data-md-toggle="search"]:checked ~ .md-header .md-search__input::placeholder,
[data-md-toggle="search"]:checked ~ .md-header .md-search__input + .md-search__icon {
  color: var(--md-default-fg-color--light);
}

/* Let search and the mobile drawer cover the decorative band and edition badge. */
[data-md-toggle="search"]:checked ~ .md-container .t2-strip,
[data-md-toggle="drawer"]:checked ~ .md-container .t2-strip {
  z-index: 2;
}