/* Tanmai Chess documentation.
 *
 * The palette is the app's own (see R/app_theme.R), so the docs and the thing
 * they document read as one product. Poppins is self-hosted rather than pulled
 * from Google's CDN: the site then makes no third-party request, and works
 * offline once loaded.
 */

/* ---- Poppins, Latin subset, SIL OFL 1.1 (see fonts/OFL.txt) ------------- */

@font-face {
  font-family: "Poppins";
  src: url("fonts/poppins-300.woff2") format("woff2");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Poppins";
  src: url("fonts/poppins-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Poppins";
  src: url("fonts/poppins-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Poppins";
  src: url("fonts/poppins-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Poppins";
  src: url("fonts/poppins-700.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ---- tokens ------------------------------------------------------------ */

:root {
  --tc-accent: #1f9d61;
  --tc-accent-soft: rgba(31, 157, 97, 0.12);
  --tc-line: rgba(16, 22, 32, 0.09);
  --tc-ink-2: #495260;
}
[data-bs-theme="dark"] {
  --tc-accent: #34c583;
  --tc-accent-soft: rgba(52, 197, 131, 0.16);
  --tc-line: rgba(255, 255, 255, 0.1);
  --tc-ink-2: #a3adba;
}

body {
  font-family: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  letter-spacing: -0.003em;
}

h1,
h2,
h3,
h4,
h5,
h6,
.navbar-brand {
  font-family: "Poppins", sans-serif;
  letter-spacing: -0.018em;
}

/* Poppins runs large and round; the default pkgdown scale looks shouty in it. */
h1 {
  font-size: 2.1rem;
  font-weight: 650;
}
h2 {
  font-size: 1.45rem;
  font-weight: 600;
  margin-top: 2.2rem;
}
h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

code,
pre,
kbd {
  font-family: "JetBrains Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;
  font-size: 0.86em;
}

/* ---- navbar ------------------------------------------------------------ */

.navbar {
  border-bottom: 1px solid var(--tc-line);
  box-shadow: 0 1px 3px rgba(16, 22, 32, 0.04);
}
.navbar-brand {
  font-weight: 650;
}
.navbar .nav-link {
  font-weight: 500;
}
.navbar .nav-link:hover,
.navbar .nav-link:focus {
  color: var(--tc-accent) !important;
}
.navbar .nav-item {
  margin-right: 0.35rem;
}

/* Dropdowns: pkgdown's default sits flush against the bar and reads as part of
   the page rather than as a menu. */
.dropdown-menu {
  border: 1px solid var(--tc-line);
  border-radius: 0.6rem;
  box-shadow: 0 10px 28px rgba(16, 22, 32, 0.14);
  padding: 0.35rem;
  margin-top: 0.4rem;
  min-width: 15rem;
}
.dropdown-item {
  border-radius: 0.4rem;
  padding: 0.45rem 0.7rem;
  white-space: normal; /* long article titles wrap instead of stretching */
}
.dropdown-item:hover,
.dropdown-item:focus {
  background-color: var(--tc-accent-soft);
  color: inherit;
}
.dropdown-item.active,
.dropdown-item:active {
  background-color: var(--tc-accent);
  color: #fff;
}
[data-bs-theme="dark"] .dropdown-menu {
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
}

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

main a,
.page-header a {
  text-decoration-color: var(--tc-accent-soft);
  text-underline-offset: 0.15em;
}
main a:hover {
  color: var(--tc-accent);
}

blockquote {
  border-left: 3px solid var(--tc-accent);
  background: var(--tc-accent-soft);
  padding: 0.75rem 1rem;
  border-radius: 0 0.5rem 0.5rem 0;
  color: inherit;
}

/* Tables carry most of the measured results on this site, so they get to look
   deliberate rather than like leftover Bootstrap. */
main table {
  border: 1px solid var(--tc-line);
  border-radius: 0.6rem;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  font-size: 0.94em;
}
main table th {
  background: var(--tc-accent-soft);
  font-weight: 600;
  border-bottom: 1px solid var(--tc-line) !important;
}
main table td,
main table th {
  padding: 0.5rem 0.75rem;
}

/* Screenshots in the walkthroughs. */
main img {
  max-width: 100%;
  border: 1px solid var(--tc-line);
  border-radius: 0.6rem;
}
/* ...but not inline badges, which are images too. */
main p > img[src*="badge"],
main p > a > img {
  border: 0;
  border-radius: 0;
}

/* ---- reference index --------------------------------------------------- */

.template-reference-index h2 {
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--tc-line);
}
.ref-index .icon img {
  border: 0;
}
/* The one-line description beside each function is the useful part of this
   page; the default styling makes it an afterthought. */
.ref-desc {
  color: var(--tc-ink-2);
}

/* ---- sidebar / footer -------------------------------------------------- */

.page-sidebar .sidebar-section {
  border-top: 1px solid var(--tc-line);
  padding-top: 0.9rem;
  margin-top: 0.9rem;
}
.page-sidebar h2 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tc-ink-2);
  margin-top: 0;
}

footer {
  border-top: 1px solid var(--tc-line);
  margin-top: 3rem;
  padding-top: 1.25rem;
  font-size: 0.9em;
  color: var(--tc-ink-2);
}

/* ---- search ------------------------------------------------------------ */

#search-input {
  border-radius: 0.5rem;
  border: 1px solid var(--tc-line);
}
#search-input:focus {
  border-color: var(--tc-accent);
  box-shadow: 0 0 0 3px var(--tc-accent-soft);
}

@media (max-width: 767.98px) {
  h1 {
    font-size: 1.7rem;
  }
  main table {
    display: block;
    overflow-x: auto; /* result tables must scroll, not break the page */
  }
}