/*
 * Handbook site styling — colors derive from the active L2 instance's
 * theme: block, not hard-coded here.
 *
 * The `--qs-*` semantic tokens below carry NEUTRAL fallbacks (mirroring
 * common/theme.py::DEFAULT_PRESET — the blues/greys QuickSight CLASSIC
 * would otherwise pick). When the L2 YAML carries a `theme:` block,
 * main.py::_apply_l2_theme_css writes a generated
 * stylesheets/_l2_theme.css that overrides these tokens with the
 * institution palette; it's registered on `extra_css` AFTER this file,
 * so it wins. Material's `--md-*` brand vars are mapped onto `--qs-*`,
 * so that one generated override file re-skins both Material's chrome
 * (header / tabs / links) AND the `.snb-*` / `.qs-*` rules below.
 *
 * The `.snb-*` class names are markup hooks used by the handbook pages
 * (hero block, walkthrough card grids, section labels) — kept as-is;
 * they're stylesheet artifacts, not persona prose. Only the colors are
 * theme-driven.
 */

/*
 * No-logo fallback. When `theme.logo` is unset in mkdocs.yml AND the
 * active L2 instance YAML doesn't override (`l2.theme.logo`),
 * mkdocs-material substitutes its built-in `material/library` SVG
 * icon. We don't want a generic library icon for a financial-reporting
 * tool — hide the fallback SVG so the nav header / sidebar render
 * text-only. An L2-supplied logo renders as an <img> tag and is
 * unaffected by this rule.
 */
.md-header__button.md-logo svg,
.md-nav__button.md-logo svg {
  display: none;
}

:root {
  /* Neutral fallbacks — mirror common/theme.py::DEFAULT_PRESET. An L2
   * instance YAML's theme: block overrides these via the generated
   * stylesheets/_l2_theme.css (main.py::_apply_l2_theme_css). The
   * comments name the ThemePreset field each maps to. */
  --qs-accent:        #2E5090;   /* theme.accent — header bar, links, brand */
  --qs-accent-light:  #4A7DC7;   /* theme.dimension — tab bar, hover states */
  --qs-accent-dark:   #1B2A4A;   /* theme.measure — Material's --dark variant */
  --qs-accent-fg:     #FFFFFF;   /* theme.accent_fg — text on the accent bar */
  --qs-fg:            #2D2D2D;   /* theme.primary_fg — card body text */
  --qs-fg-muted:      #4A4A4A;   /* theme.secondary_fg — captions / labels */
  --qs-surface:       #FFFFFF;   /* theme.primary_bg — card / control bg */
  --qs-surface-muted: #F5F6FA;   /* theme.secondary_bg — hero block bg */
  --qs-tint:          #E8EFF9;   /* theme.link_tint — pale accent (borders/hover) */
  --qs-warning:       #E65100;   /* theme.warning — secondary focus highlight */
  --qs-shadow:        rgba(0, 0, 0, 0.12);  /* neutral elevation — not brand-tied */
}

/* MkDocs Material custom palette mapping — applied when mkdocs.yml uses
 * palette: { primary: custom, accent: custom }. Everything routes
 * through the --qs-* tokens above, so overriding those (via the
 * generated _l2_theme.css) re-themes Material's chrome too. */
[data-md-color-scheme="default"] {
  --md-primary-fg-color:        var(--qs-accent);
  --md-primary-fg-color--light: var(--qs-accent-light);
  --md-primary-fg-color--dark:  var(--qs-accent-dark);
  --md-primary-bg-color:        var(--qs-accent-fg);
  --md-primary-bg-color--light: var(--qs-surface-muted);

  --md-accent-fg-color:         var(--qs-accent);
  --md-accent-fg-color--transparent: var(--qs-tint);
  --md-accent-bg-color:         var(--qs-surface);

  --md-typeset-a-color:         var(--qs-accent);
}

/* Header accents */
.md-header {
  background-color: var(--qs-accent);
}
.md-tabs {
  background-color: var(--qs-accent-light);
}

/* Site logo sizing */
.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 1.6rem;
  width: auto;
}

/*
 * Hero block — used on index.md and the handbook landing pages.
 * Markup: <div class="snb-hero"> ... </div>
 */
.snb-hero {
  background-color: var(--qs-surface-muted);
  border-left: 6px solid var(--qs-accent);
  border-radius: 4px;
  padding: 2.4rem 2rem;
  margin: 1.2rem 0 2rem;
  text-align: center;
}
.snb-hero img.snb-hero__wordmark {
  max-width: min(420px, 80%);
  height: auto;
  margin-bottom: 1rem;
}
.snb-hero h1,
.snb-hero h2 {
  color: var(--qs-accent);
  margin: 0.2rem 0;
  border-bottom: none;
}
.snb-hero p.snb-hero__tagline {
  color: var(--qs-fg-muted);
  font-size: 1.1rem;
  margin: 0.4rem 0 0;
}

/*
 * Walkthrough card grid — used on the handbook landing pages.
 * Markup:
 *   <div class="snb-card-grid">
 *     <a class="snb-card" href="...">
 *       <h3>Title</h3>
 *       <p>Tagline / question this walkthrough answers.</p>
 *     </a>
 *   </div>
 */
.snb-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.snb-card {
  display: block;
  padding: 1rem 1.2rem;
  border: 1px solid var(--qs-tint);
  border-left: 4px solid var(--qs-accent);
  border-radius: 4px;
  background-color: var(--qs-surface);
  color: var(--qs-fg);
  text-decoration: none;
  transition: box-shadow 120ms ease, transform 120ms ease;
}
.snb-card:hover {
  box-shadow: 0 4px 12px var(--qs-shadow);
  transform: translateY(-1px);
  text-decoration: none;
}
.snb-card h3 {
  color: var(--qs-accent);
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}
.snb-card p {
  margin: 0;
  color: var(--qs-fg-muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

/* Section labels above card groups (e.g., "Morning checks") */
.snb-section-label {
  color: var(--qs-fg-muted);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 1.6rem 0 0.4rem;
}

/*
 * Diagram lightbox — paired with stylesheets/qs-lightbox.js.
 *
 * <figure class="qs-diagram" data-zoomable="true"> wrappers (emitted by
 * main.py::_wrap_svg) get the zoom-in cursor + a soft hover hint so the
 * affordance is obvious. Click opens the overlay below.
 */
figure.qs-diagram[data-zoomable="true"] {
  cursor: zoom-in;
  transition: box-shadow 120ms ease, transform 120ms ease;
  border-radius: 4px;
}
figure.qs-diagram[data-zoomable="true"]:hover,
figure.qs-diagram[data-zoomable="true"]:focus-visible {
  box-shadow: 0 2px 10px var(--qs-shadow);
  outline: 2px solid var(--qs-accent);
  outline-offset: 2px;
}
figure.qs-diagram[data-zoomable="true"] svg {
  pointer-events: none; /* clicks bubble to the figure, not nodes */
}

/* The overlay itself — built lazily by qs-lightbox.js. */
.qs-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
}
.qs-lightbox[hidden] {
  display: none;
}
.qs-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(15, 18, 22, 0.82);
}
.qs-lightbox__viewport {
  position: relative;
  flex: 1;
  overflow: hidden;
  cursor: grab;
}
.qs-lightbox__viewport--grabbing {
  cursor: grabbing;
}
.qs-lightbox__svg-host {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform-origin: 0 0;
  will-change: transform;
}
.qs-lightbox__svg-host svg {
  display: block;
  width: 100%;
  height: 100%;
}
.qs-lightbox__controls {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.96);
  padding: 0.4rem;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}
.qs-lightbox__btn {
  appearance: none;
  border: 1px solid var(--qs-tint);
  background: var(--qs-surface);
  color: var(--qs-accent);
  font-size: 1rem;
  line-height: 1;
  padding: 0.45rem 0.7rem;
  border-radius: 3px;
  cursor: pointer;
  font-weight: 600;
  min-width: 2.2rem;
}
.qs-lightbox__btn:hover {
  background: var(--qs-tint);
}
.qs-lightbox__btn:focus-visible {
  outline: 2px solid var(--qs-warning);
  outline-offset: 1px;
}
body.qs-lightbox-open {
  overflow: hidden;
}

/* Slate (dark) scheme — Material's `palette.scheme: slate` swaps these
 * via the data-md-color-scheme attribute. We don't ship slate today
 * (mkdocs.yml uses scheme: default only) but keeping the rule means a
 * future scheme switch doesn't leave the controls illegible. */
[data-md-color-scheme="slate"] .qs-lightbox__controls {
  background: rgba(40, 44, 42, 0.96);
}
[data-md-color-scheme="slate"] .qs-lightbox__btn {
  background: #2b3230;
  color: #e8e8e8;
  border-color: #4a5550;
}
[data-md-color-scheme="slate"] .qs-lightbox__btn:hover {
  background: #3a4340;
}

/*
 * Content area width (Material's documented override).
 *
 * Material's default `.md-grid` caps the content area at 1220px,
 * which leaves a lot of unused horizontal space on the wide L2
 * topology diagrams and the seed-generator reference page. Bump
 * to 1440px so those diagrams breathe without going edge-to-edge
 * at ultra-wide viewports.
 *
 * Per https://squidfunk.github.io/mkdocs-material/setup/setting-up-navigation/#content-area-width
 * — swap to `max-width: initial` if we ever want the full screen.
 */
.md-grid {
  max-width: 1440px;
}