/* ============================================================================
   smelt — mkdocs-material theme overrides
   Applies the smelt design system on top of Material defaults.
   ============================================================================ */

@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:wght@400;500;600&display=swap");

/* ---------- Smelt tokens (mirrored from the design system) ---------------- */
:root {
  --smelt-indigo:      #3F46D6;
  --smelt-indigo-deep: #2A30A8;
  --smelt-indigo-soft: #EEF0FF;
  --smelt-ember:       #D9540B;
  --smelt-ember-soft:  #FCEEDF;
  --smelt-iron:        #1B1F2A;

  --smelt-ink-0:   #FFFFFF;
  --smelt-ink-50:  #F7F8FA;
  --smelt-ink-100: #EEF0F3;
  --smelt-ink-200: #DEE2E8;
  --smelt-ink-300: #C2C8D2;
  --smelt-ink-400: #97A0AE;
  --smelt-ink-500: #6B7280;
  --smelt-ink-600: #4B5563;
  --smelt-ink-700: #374151;
  --smelt-ink-800: #232834;
  --smelt-ink-900: #14171F;

  --smelt-display: "IBM Plex Serif", Georgia, ui-serif, serif;
}

/* ---------- Map smelt tokens onto Material variables ---------------------- */
:root,
[data-md-color-scheme="default"] {
  --md-primary-fg-color:         var(--smelt-indigo);
  --md-primary-fg-color--light:  var(--smelt-indigo-soft);
  --md-primary-fg-color--dark:   var(--smelt-indigo-deep);
  --md-primary-bg-color:         #ffffff;
  --md-primary-bg-color--light:  #ffffffcc;

  --md-accent-fg-color:          var(--smelt-indigo);
  --md-accent-fg-color--transparent: color-mix(in oklab, var(--smelt-indigo) 10%, transparent);
  --md-accent-bg-color:          #ffffff;

  --md-default-bg-color:         var(--smelt-ink-0);
  --md-default-fg-color:         var(--smelt-ink-700);
  --md-default-fg-color--light:  var(--smelt-ink-600);
  --md-default-fg-color--lighter:var(--smelt-ink-400);
  --md-default-fg-color--lightest:var(--smelt-ink-100);

  --md-typeset-color:            var(--smelt-ink-700);
  --md-typeset-a-color:          var(--smelt-indigo);

  --md-code-fg-color:            var(--smelt-ink-800);
  --md-code-bg-color:            var(--smelt-ink-100);

  --md-footer-bg-color:          var(--smelt-ink-900);
  --md-footer-bg-color--dark:    #0e1119;
  --md-footer-fg-color:          #d8dbe1;
  --md-footer-fg-color--light:   #9aa1ad;
  --md-footer-fg-color--lighter: #6b7280;
}

[data-md-color-scheme="slate"] {
  --md-hue: 230;
  --md-primary-fg-color:         #8087ff;
  --md-primary-fg-color--light:  #2a2f4a;
  --md-primary-fg-color--dark:   var(--smelt-indigo);
  --md-accent-fg-color:          #8087ff;
  --md-default-bg-color:         #14171F;
  --md-default-fg-color:         #d8dbe1;
  --md-typeset-color:            #d8dbe1;
  --md-typeset-a-color:          #9aa1ff;
  --md-code-bg-color:            #1e2230;
  --md-code-fg-color:            #e5e7ec;
}

/* ---------- Header / top nav -------------------------------------------- */
.md-header {
  background: rgba(255, 255, 255, 0.94);
  color: var(--smelt-iron);
  box-shadow: 0 1px 0 var(--smelt-ink-100);
  backdrop-filter: saturate(160%) blur(8px);
}
[data-md-color-scheme="slate"] .md-header {
  background: rgba(20, 23, 31, 0.92);
  color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}
.md-header__title {
  font-family: var(--smelt-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 22px;
  width: auto;
}

/* Tabs (top-level nav) */
.md-tabs {
  background: transparent;
  color: var(--smelt-ink-700);
  border-bottom: 1px solid var(--smelt-ink-100);
}
[data-md-color-scheme="slate"] .md-tabs {
  color: #d8dbe1;
  border-bottom-color: rgba(255,255,255,0.06);
}
.md-tabs__link {
  font-size: 13.5px;
  font-weight: 500;
  opacity: 1;
  color: var(--smelt-ink-600);
}
.md-tabs__link--active,
.md-tabs__link:hover {
  color: var(--smelt-iron);
}
[data-md-color-scheme="slate"] .md-tabs__link--active,
[data-md-color-scheme="slate"] .md-tabs__link:hover { color: #fff; }

/* ---------- Sidebar (left nav) ------------------------------------------ */
.md-nav {
  font-size: 13.5px;
}
/* Section group headers in the left sidebar (Getting Started, Concepts,
   etc.) — small uppercase Plex Mono. Explicitly excludes the top-level
   drawer title, which gets its own treatment further down. */
.md-nav__title:not([for=__drawer]) {
  font-family: var(--md-code-font, "IBM Plex Mono"), monospace;
  font-size: 11px !important;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--smelt-ink-500);
  font-weight: 500;
  padding-top: 1.2rem;
}
.md-nav__link {
  color: var(--smelt-ink-600);
  margin: 1px 0;
  padding: 4px 8px;
  border-radius: 5px;
  line-height: 1.4;
}
.md-nav__link:hover,
.md-nav__link:focus {
  color: var(--smelt-iron);
  background: var(--smelt-ink-100);
}
.md-nav__link--active,
.md-nav__item--active > .md-nav__link {
  color: var(--smelt-indigo) !important;
  background: var(--smelt-indigo-soft);
  font-weight: 500;
  position: relative;
}
.md-nav__link--active::before,
.md-nav__item--active > .md-nav__link::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: var(--smelt-indigo);
}
[data-md-color-scheme="slate"] .md-nav__link:hover { background: rgba(255,255,255,0.04); }
[data-md-color-scheme="slate"] .md-nav__link--active,
[data-md-color-scheme="slate"] .md-nav__item--active > .md-nav__link {
  background: rgba(128, 135, 255, 0.12);
  color: #9aa1ff !important;
}

/* ---------- Typography (article body) ----------------------------------- */
.md-typeset {
  font-size: 15px;
  line-height: 1.65;
  color: var(--smelt-ink-700);
}
[data-md-color-scheme="slate"] .md-typeset { color: #d8dbe1; }

.md-typeset h1 {
  font-family: var(--smelt-display);
  font-weight: 500;
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--smelt-iron);
  margin: 0 0 14px;
  text-wrap: balance;
}
.md-typeset h2 {
  font-family: var(--smelt-display);
  font-weight: 500;
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--smelt-iron);
  margin: 40px 0 12px;
  text-wrap: balance;
  scroll-margin-top: 80px;
}
.md-typeset h3 {
  font-family: var(--md-text-font, "IBM Plex Sans"), sans-serif;
  font-weight: 600;
  font-size: 17px;
  line-height: 1.35;
  letter-spacing: -0.003em;
  color: var(--smelt-iron);
  margin: 28px 0 10px;
}
.md-typeset h4 {
  font-family: var(--md-code-font, "IBM Plex Mono"), monospace;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--smelt-ink-500);
  margin: 24px 0 8px;
}
[data-md-color-scheme="slate"] .md-typeset h1,
[data-md-color-scheme="slate"] .md-typeset h2,
[data-md-color-scheme="slate"] .md-typeset h3 { color: #fff; }

/* Heading anchor */
.md-typeset .headerlink {
  color: var(--smelt-ink-300);
  font-family: var(--md-code-font, "IBM Plex Mono"), monospace;
}
.md-typeset .headerlink:hover { color: var(--smelt-indigo); }

/* Lede paragraph — the first <p> immediately after h1 */
.md-typeset h1 + p {
  font-size: 18px;
  line-height: 1.55;
  color: var(--smelt-ink-600);
  margin-bottom: 32px;
  text-wrap: pretty;
}

.md-typeset p {
  text-wrap: pretty;
}
.md-typeset a {
  border-bottom: 1px solid color-mix(in oklab, var(--smelt-indigo) 25%, transparent);
  text-decoration: none;
  transition: border-color 120ms ease;
}
.md-typeset a:hover { border-bottom-color: var(--smelt-indigo); }

.md-typeset strong { color: var(--smelt-iron); font-weight: 600; }
[data-md-color-scheme="slate"] .md-typeset strong { color: #fff; }

/* ---------- Inline + block code ---------------------------------------- */
.md-typeset code {
  font-size: 0.86em;
  background: var(--smelt-ink-100);
  border: 1px solid var(--smelt-ink-200);
  border-radius: 3px;
  padding: 0 5px;
  color: var(--smelt-ink-800);
}
[data-md-color-scheme="slate"] .md-typeset code {
  background: #1e2230;
  border-color: rgba(255,255,255,0.08);
  color: #e5e7ec;
}
.md-typeset pre > code,
.md-typeset .highlight pre {
  background: var(--smelt-ink-900);
  color: #e5e7ec;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.7;
  border: 0;
}
.md-typeset .highlight {
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(20, 23, 31, 0.06), 0 1px 3px rgba(20, 23, 31, 0.04);
}
.md-typeset pre > code {
  padding: 14px 18px;
}
/* Filename label above a code block (when ```python title="foo.py" is used) */
.md-typeset .highlight .filename {
  background: linear-gradient(to bottom, #232834, #1A1F2A);
  color: #97A0AE;
  font-family: var(--md-code-font, "IBM Plex Mono"), monospace;
  font-size: 11.5px;
  font-weight: 400;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px 8px 0 0;
  padding: 7px 14px;
}
.md-typeset .highlight .filename + pre > code,
.md-typeset .highlight .filename ~ pre > code { border-radius: 0 0 8px 8px; }
/* Copy button */
.md-clipboard {
  color: var(--smelt-ink-400);
}
.md-clipboard:hover { color: #fff; }

/* ---------- Tables ----------------------------------------------------- */
.md-typeset table:not([class]) {
  font-size: 14px;
  border: 1px solid var(--smelt-ink-200);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: none;
}
.md-typeset table:not([class]) th {
  background: var(--smelt-ink-50);
  font-family: var(--md-code-font, "IBM Plex Mono"), monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--smelt-ink-500);
  border-bottom: 1px solid var(--smelt-ink-200);
}
.md-typeset table:not([class]) td {
  border-top: 1px solid var(--smelt-ink-100);
  padding: 9px 14px;
}
[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background: #1e2230;
  color: #97A0AE;
  border-bottom-color: rgba(255,255,255,0.08);
}
[data-md-color-scheme="slate"] .md-typeset table:not([class]) td {
  border-top-color: rgba(255,255,255,0.06);
}

/* ---------- Admonitions / callouts -------------------------------------- */
.md-typeset .admonition,
.md-typeset details {
  border-radius: 8px;
  border: 1px solid var(--smelt-ink-200);
  box-shadow: none;
  font-size: 14px;
  background: var(--smelt-ink-50);
}
.md-typeset .admonition-title,
.md-typeset summary {
  font-family: var(--md-text-font, "IBM Plex Sans"), sans-serif;
  font-weight: 600;
  font-size: 13px;
  color: var(--smelt-iron);
  background: transparent;
  border-bottom: 0;
  padding-left: 2.2rem;
}
.md-typeset .admonition-title::before,
.md-typeset summary::before {
  width: 16px;
  height: 16px;
  top: 0.85rem;
  left: 0.85rem;
}
.md-typeset .admonition > p,
.md-typeset details > p { font-size: 14px; line-height: 1.6; }

/* Note (default / info) — indigo */
.md-typeset .admonition.note,
.md-typeset details.note {
  background: var(--smelt-indigo-soft);
  border-color: color-mix(in oklab, var(--smelt-indigo) 25%, transparent);
}
.md-typeset .note > .admonition-title::before,
.md-typeset .note > summary::before { background-color: var(--smelt-indigo); }

/* Warning — ember */
.md-typeset .admonition.warning,
.md-typeset details.warning {
  background: var(--smelt-ember-soft);
  border-color: color-mix(in oklab, var(--smelt-ember) 25%, transparent);
}
.md-typeset .warning > .admonition-title::before,
.md-typeset .warning > summary::before { background-color: var(--smelt-ember); }

/* Tip — green (Material's default green works) */
.md-typeset .admonition.tip,
.md-typeset details.tip {
  background: #ECFDF3;
  border-color: #BBF7D0;
}

/* ---------- Tabs (content tabs) ----------------------------------------- */
.md-typeset .tabbed-set > input:checked + label {
  color: var(--smelt-indigo);
  border-color: var(--smelt-indigo);
}
.md-typeset .tabbed-labels > label {
  font-family: var(--md-text-font, "IBM Plex Sans"), sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--smelt-ink-500);
}

/* ---------- Right TOC --------------------------------------------------- */
.md-nav--secondary .md-nav__title {
  border-bottom: 1px solid var(--smelt-ink-100);
  padding-bottom: 8px;
  margin-bottom: 6px;
  color: var(--smelt-ink-500);
}
.md-nav--secondary .md-nav__link {
  font-size: 12.5px;
  padding: 3px 0;
  margin-left: 0;
  border-left: 2px solid transparent;
  border-radius: 0;
  padding-left: 12px;
}
.md-nav--secondary .md-nav__link:hover {
  background: transparent;
  color: var(--smelt-iron);
}
.md-nav--secondary .md-nav__link--active {
  background: transparent !important;
  border-left-color: var(--smelt-indigo);
  color: var(--smelt-indigo) !important;
}
.md-nav--secondary .md-nav__link--active::before { display: none; }

/* ---------- Search ----------------------------------------------------- */
.md-search__form {
  background: var(--smelt-ink-50);
  border: 1px solid var(--smelt-ink-200);
  border-radius: 5px;
  height: 32px;
}
.md-search__form:hover { background: var(--smelt-ink-100); }
.md-search__input {
  font-family: var(--md-text-font, "IBM Plex Sans"), sans-serif;
  font-size: 13px;
  color: var(--smelt-iron);
}
.md-search__input::placeholder { color: var(--smelt-ink-400); }
[data-md-color-scheme="slate"] .md-search__form {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}

/* ---------- Footer ----------------------------------------------------- */
.md-footer-meta {
  background: var(--smelt-ink-900);
  font-size: 12.5px;
}
.md-footer-meta .md-footer-meta__inner {
  padding: 18px 24px;
}

/* ---------- Pager (prev/next) ------------------------------------------ */
.md-footer__inner {
  background: var(--smelt-ink-50);
  border-top: 1px solid var(--smelt-ink-100);
}
.md-footer__link {
  opacity: 1;
}
.md-footer__link .md-footer__title {
  color: var(--smelt-iron);
  font-weight: 500;
}
.md-footer__link .md-footer__direction {
  font-family: var(--md-code-font, "IBM Plex Mono"), monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--smelt-ink-500);
}

/* ---------- Misc polish ------------------------------------------------ */
.md-typeset hr {
  border-top: 1px solid var(--smelt-ink-100);
  margin: 32px 0;
}
.md-typeset blockquote {
  border-left: 3px solid var(--smelt-ember);
  color: var(--smelt-ink-600);
  background: transparent;
  padding-left: 16px;
}
.md-typeset img { border-radius: 6px; }

/* ---------- Syntax highlighting (Pygments tokens) -----------------------
 * Code blocks use a dark background (ink-900) in both light and dark site
 * schemes. Material's default token palette is tuned for its lighter code
 * surface, so identifiers (SELECT columns, YAML keys, etc.) wash out. We
 * override the --md-code-hl-* variables for both schemes and add explicit
 * rules for the few tokens Material lumps under a single colour (YAML
 * tags/attributes, function names, comments).
 * ----------------------------------------------------------------------- */
:root,
[data-md-color-scheme="default"],
[data-md-color-scheme="slate"] {
  --md-code-hl-keyword-color:     #A599FF;
  --md-code-hl-operator-color:    #A599FF;
  --md-code-hl-string-color:      #E8B86C;
  --md-code-hl-number-color:      #F08B6E;
  --md-code-hl-constant-color:    #FB7185;
  --md-code-hl-special-color:     #FB7185;
  --md-code-hl-function-color:    #7DD3FC;
  --md-code-hl-name-color:        #E5E7EC;
  --md-code-hl-variable-color:    #86E3CE;
  --md-code-hl-comment-color:     #94A3B8;
  --md-code-hl-punctuation-color: #94A3B8;
  --md-code-hl-generic-color:     #E5E7EC;
}

/* YAML / TOML / frontmatter keys, HTML attributes — distinct from other
   "name" tokens (Material maps these all to --md-code-hl-name-color). */
.md-typeset .highlight .nt,
.md-typeset .highlight .na,
.md-typeset .highlight .nl {
  color: #86E3CE;
  font-weight: 500;
}

/* Function and method calls (SUM(...), COUNT(...), pipeline functions). */
.md-typeset .highlight .nf,
.md-typeset .highlight .nb,
.md-typeset .highlight .fm {
  color: #7DD3FC;
}

/* Class / type names (PascalCase types in Python / Rust signatures). */
.md-typeset .highlight .nc,
.md-typeset .highlight .nn {
  color: #FBBF77;
}

/* Built-in / language constants — NULL, TRUE, FALSE, None, self, &c. */
.md-typeset .highlight .kc,
.md-typeset .highlight .bp {
  color: #FB7185;
}

/* Comments — italic for clearer hierarchy. */
.md-typeset .highlight .c,
.md-typeset .highlight .c1,
.md-typeset .highlight .cm,
.md-typeset .highlight .ch,
.md-typeset .highlight .cs,
.md-typeset .highlight .cp {
  font-style: italic;
}

/* ---------- Header controls — explicit token overrides -----------------
 * Material wires several header controls (search icons + placeholder,
 * source/repo block, mode toggle, drawer button) to --md-primary-bg-color,
 * which we leave at white for use on the indigo accent button. Override
 * those controls directly so they read on our white-translucent header.
 * ----------------------------------------------------------------------- */
.md-header__source { color: var(--smelt-ink-700); }
.md-source__icon,
.md-source__repository { color: inherit; }
.md-source__fact { color: var(--smelt-ink-500); }

.md-header__button { color: var(--smelt-ink-600); }
.md-header__button:hover { color: var(--smelt-indigo); opacity: 1; }

/* Search form in the header — Material's .md-header .md-search__form rule
   has higher specificity than our earlier .md-search__form override. */
.md-header .md-search__form {
  background-color: var(--smelt-ink-50);
  color: var(--smelt-iron);
  box-shadow: none;
}
.md-header .md-search__form:hover { background-color: var(--smelt-ink-100); }
.md-header .md-search__input { color: var(--smelt-iron); }
.md-header .md-search__input::placeholder { color: var(--smelt-ink-400); }
.md-header .md-search__input + .md-search__icon,
.md-header .md-search__icon {
  color: var(--smelt-ink-500);
}

/* ---------- Tabs strip --------------------------------------------------
 * Was transparent — meant content scrolled visibly behind the sticky bar.
 * Match the header: white-translucent with the same blur treatment.
 * Active tab gets indigo to match the sidebar's active treatment.
 * ----------------------------------------------------------------------- */
.md-tabs {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(160%) blur(8px);
}
.md-tabs__link--active,
.md-tabs__item--active > .md-tabs__link {
  color: var(--smelt-indigo);
  font-weight: 500;
  opacity: 1;
}

/* ---------- Dark-mode (slate) header equivalents ----------------------- */
[data-md-color-scheme="slate"] .md-header__source,
[data-md-color-scheme="slate"] .md-source__fact { color: #d8dbe1; }
[data-md-color-scheme="slate"] .md-header__button { color: #d8dbe1; }
[data-md-color-scheme="slate"] .md-header__button:hover { color: #8087ff; }

[data-md-color-scheme="slate"] .md-header .md-search__form {
  background-color: rgba(255, 255, 255, 0.06);
  color: #fff;
}
[data-md-color-scheme="slate"] .md-header .md-search__form:hover {
  background-color: rgba(255, 255, 255, 0.1);
}
[data-md-color-scheme="slate"] .md-header .md-search__input { color: #fff; }
[data-md-color-scheme="slate"] .md-header .md-search__input::placeholder { color: #97A0AE; }
[data-md-color-scheme="slate"] .md-header .md-search__input + .md-search__icon,
[data-md-color-scheme="slate"] .md-header .md-search__icon { color: #97A0AE; }

[data-md-color-scheme="slate"] .md-tabs {
  background: rgba(20, 23, 31, 0.92);
}
[data-md-color-scheme="slate"] .md-tabs__link--active,
[data-md-color-scheme="slate"] .md-tabs__item--active > .md-tabs__link {
  color: #9aa1ff;
}

/* ---------- Left sidebar header (primary nav title + source) ----------
 * Material hard-wires the top-level sidebar title (logo + "smelt") to
 * --md-primary-fg-color and the embedded GitHub source to
 * --md-primary-fg-color--dark — both renders as loud indigo blocks. Use
 * smelt tokens instead so the left nav header sits quietly with the rest
 * of the design.
 * ----------------------------------------------------------------------- */
.md-nav--primary .md-nav__title[for=__drawer] {
  background: var(--smelt-ink-50);
  color: var(--smelt-iron);
  font-family: var(--smelt-display);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: -0.01em;
  text-transform: none;
  border-bottom: 1px solid var(--smelt-ink-100);
  padding: 1rem 1rem 0.8rem;
  height: auto;
  line-height: 1.3;
}
.md-nav--primary .md-nav__title[for=__drawer] .md-nav__button.md-logo img,
.md-nav--primary .md-nav__title[for=__drawer] .md-nav__button.md-logo svg {
  height: 22px;
  width: auto;
  margin-right: 0.4rem;
  vertical-align: middle;
}

.md-nav__source {
  background: var(--smelt-ink-50);
  color: var(--smelt-ink-700);
  border-bottom: 1px solid var(--smelt-ink-100);
  padding: 0.2rem 0.4rem;
}
.md-nav__source .md-source,
.md-nav__source .md-source__icon,
.md-nav__source .md-source__repository {
  color: var(--smelt-ink-700);
}
.md-nav__source:hover { background: var(--smelt-ink-100); }

/* Dark-mode (slate) equivalents */
[data-md-color-scheme="slate"] .md-nav--primary .md-nav__title[for=__drawer] {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, 0.06);
}
[data-md-color-scheme="slate"] .md-nav__source {
  background: rgba(255, 255, 255, 0.04);
  color: #d8dbe1;
  border-bottom-color: rgba(255, 255, 255, 0.06);
}
[data-md-color-scheme="slate"] .md-nav__source .md-source,
[data-md-color-scheme="slate"] .md-nav__source .md-source__icon,
[data-md-color-scheme="slate"] .md-nav__source .md-source__repository {
  color: #d8dbe1;
}
[data-md-color-scheme="slate"] .md-nav__source:hover {
  background: rgba(255, 255, 255, 0.08);
}