/* Fair-Seldonian documentation theme overrides.
 *
 * Kept deliberately small: the PyData theme is already close to what we want, so
 * this only sets the brand colours, tightens the generated tables, and fixes the
 * one thing dark mode genuinely breaks (saved notebook figures).
 */

/* -- Type scale ------------------------------------------------------------ */

/* The theme's defaults are set for a marketing-sized page: 16px body under a
 * 42px h1, stepping down only to 24px by h4. On a reference page that is mostly
 * h2/h3 sections the headings crowd out the prose they label.
 *
 * These are the theme's own variables, redefined on the same selector it uses;
 * custom.css loads after the theme stylesheet, so these win. Note the base size
 * compounds: html's own font-size is set from --pst-font-size-base, so 1rem
 * becomes 15px for everything below it and the heading rem values scale with it. */
html {
  --pst-font-size-base: 0.9375rem; /* 16px -> 15px body text */
  --pst-font-size-h1: 2rem; /* 42px -> 30px */
  --pst-font-size-h2: 1.5rem; /* 34px -> 22px */
  --pst-font-size-h3: 1.25rem; /* 28px -> 19px */
  --pst-font-size-h4: 1.1rem; /* 24px -> 17px */
  /* Only h1-h3 appear in these docs today, but keep the tail of the scale at or
   * above body size: a heading smaller than the text it introduces reads as a
   * mistake, and headings are already distinguished by weight. */
  --pst-font-size-h5: 1.05rem; /* 20px -> 16px */
  --pst-font-size-h6: 1rem; /* 16px -> 15px */
}

/* API signatures are monospace at the full body size, which reads a size larger
 * than the prose around them -- and since long signatures now wrap one parameter
 * per line, a seven-argument class became a seven-line block. */
dt.sig,
dt.sig-object {
  font-size: 0.875em;
}

/* The dotted module path prefix on every signature is noise once you know which
 * page you are on; keep it legible but let the name itself lead. */
.sig-prename.descclassname {
  font-size: 0.95em;
  color: var(--pst-color-text-muted);
}

/* -- Brand ---------------------------------------------------------------- */

html[data-theme="light"] {
  --pst-color-primary: #1a5f7a;
  --pst-color-secondary: #b8621b;
  --pst-color-accent: #0f8b8d;
  --pst-color-inline-code: #b8621b;
}

html[data-theme="dark"] {
  --pst-color-primary: #6bb8d6;
  --pst-color-secondary: #e89b5a;
  --pst-color-accent: #4ecdc4;
  --pst-color-inline-code: #e89b5a;
}

/* -- Saved notebook figures ----------------------------------------------- */

/* The example notebooks ship with matplotlib PNGs drawn on a white canvas with
 * near-black text. On a dark page the text becomes black-on-dark and disappears.
 * Regenerating a second set of figures per theme is not worth the maintenance,
 * so give the images their own light backing instead. */
html[data-theme="dark"] .cell_output img,
html[data-theme="dark"] figure img[src*="_images"] {
  background-color: #ffffff;
  border-radius: 4px;
  padding: 0.4rem;
}

/* -- Generated tables ----------------------------------------------------- */

/* The constraint and inequality tables carry postfix strings and formulas that
 * must not be broken across lines mid-token. */
table.fs-generated td code,
table.fs-generated td .docutils.literal {
  white-space: nowrap;
}

table.fs-generated {
  font-size: 0.9em;
}

table.fs-generated th {
  background-color: var(--pst-color-surface);
}

/* Yes/no capability cells in the comparison matrix. */
.fs-yes {
  color: var(--pst-color-success);
  font-weight: 600;
}

.fs-no {
  color: var(--pst-color-danger);
}

.fs-partial {
  color: var(--pst-color-warning);
}

/* -- Search ---------------------------------------------------------------- */

/* One search affordance per page, in the navbar at the top right (the sidebar
 * deliberately has none -- see html_sidebars in conf.py). The theme's default
 * button is a wide pill sized to fit the words "Search" plus a "Ctrl+K" hint;
 * shrink it to something closer to an icon button and let the hint go first
 * when space is tight. */
.navbar-persistent--container .search-button-field {
  min-width: 0;
  max-width: 11rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.82rem;
  border-radius: 1rem;
}

.navbar-persistent--container .search-button-field .search-button__default-text {
  margin-inline: 0.35rem;
}

/* Below a wide desktop the keyboard hint is the first thing worth dropping: it
 * is the least useful part of the control and the widest. */
@media (max-width: 1200px) {
  .navbar-persistent--container .search-button-field .search-button__kbd-shortcut {
    display: none;
  }
}

/* Narrower still, keep only the magnifying glass. */
@media (max-width: 992px) {
  .navbar-persistent--container .search-button-field .search-button__default-text {
    display: none;
  }
  .navbar-persistent--container .search-button-field {
    padding: 0.25rem 0.45rem;
  }
}

/* -- Landing page --------------------------------------------------------- */

.fs-hero {
  padding: 1.5rem 0 0.5rem;
}

.fs-hero .fs-tagline {
  font-size: 1.25rem;
  color: var(--pst-color-text-muted);
  margin-bottom: 1.5rem;
}

/* Cards on the landing page should feel clickable. */
.sd-card:hover {
  border-color: var(--pst-color-primary);
  transition: border-color 0.15s ease-in-out;
}