/* TrafficCAD docs — Glassnode/Studio theme (website/DESIGN.md is canonical).
   Colors, typography, and radii only; zensical's navigation and layout stay
   stock. Inter is loaded from Google Fonts to match website/index.html (the
   docs are online-only; the app itself self-hosts via @fontsource). */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap");

/* ------------------------------------------------------------ palette
   Token names from DESIGN.md: obsidian #1a1a1a, graphite #333, iron #5a5a5a,
   slate #666, steel #808080, fog #a0a0a0, mist #dedfe1, cloud #edeff2,
   paper #f7f8fa, glacier tint #e2e7fc, badge slate #6f6f6f. Ultramarine
   (#4559dc, focus #6888fb) is the single chromatic accent, as in the app. */
:root,
[data-md-color-scheme="default"] {
  --md-text-font: "Inter";

  --md-default-fg-color: #333333;
  --md-default-fg-color--light: #666666;
  --md-default-fg-color--lighter: #a0a0a0;
  --md-default-fg-color--lightest: #dedfe1;
  --md-default-bg-color: #ffffff;

  --md-primary-fg-color: #1a1a1a;
  --md-primary-fg-color--light: #333333;
  --md-primary-fg-color--dark: #000000;
  --md-primary-bg-color: #ffffff;
  --md-primary-bg-color--light: rgba(255, 255, 255, 0.7);

  --md-accent-fg-color: #4559dc;
  --md-accent-fg-color--transparent: #e2e7fc;
  --md-accent-bg-color: #ffffff;

  --md-typeset-a-color: #4559dc;

  --md-code-bg-color: #f7f8fa;
  --md-code-fg-color: #333333;

  --md-footer-bg-color: #1a1a1a;
  --md-footer-bg-color--dark: #1a1a1a;
  --md-footer-fg-color: #ffffff;
  --md-footer-fg-color--light: #a0a0a0;
  --md-footer-fg-color--lighter: #808080;

  --md-shadow-z1: rgba(0, 0, 0, 0.04) 0px 2px 4px 0px;
  --md-shadow-z2: rgba(0, 0, 0, 0.04) 0px 2px 4px 0px,
    rgba(0, 0, 0, 0.08) 0px 8px 32px 0px;
  --md-shadow-z3: rgba(0, 0, 0, 0.04) 0px 2px 4px 0px,
    rgba(0, 0, 0, 0.08) 0px 8px 32px 0px;
}

/* Studio dark tokens: background #1a1a1a, elevated #242424, border #333,
   primary inverts to white, focus stays ultramarine-40. */
[data-md-color-scheme="slate"] {
  --md-default-fg-color: #f7f8fa;
  --md-default-fg-color--light: #a0a0a0;
  --md-default-fg-color--lighter: #666666;
  --md-default-fg-color--lightest: #333333;
  --md-default-bg-color: #1a1a1a;

  --md-primary-fg-color: #ffffff;
  --md-primary-fg-color--light: #f7f8fa;
  --md-primary-fg-color--dark: #ffffff;
  --md-primary-bg-color: #1a1a1a;

  --md-accent-fg-color: #6888fb;
  --md-accent-fg-color--transparent: rgba(104, 136, 251, 0.16);

  --md-typeset-a-color: #6888fb;

  --md-code-bg-color: #242424;
  --md-code-fg-color: #f7f8fa;
}

/* Selection is the one chromatic element, exactly as in the app. */
::selection {
  background: #4559dc;
  color: #ffffff;
}

/* ------------------------------------------------------------ header */
.md-header {
  background-color: #ffffff;
  border-bottom: 1px solid #dedfe1;
  box-shadow: none;
  color: #1a1a1a;
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 1.3rem;
  width: 1.3rem;
}

.md-header__topic,
.md-header__title {
  font-weight: 700;
}

.md-search__form {
  background-color: #ffffff;
  border: 1px solid #dedfe1;
  border-radius: 2px;
}

.md-search__form:hover {
  background-color: #ffffff;
  border-color: #a0a0a0;
}

[data-md-toggle="search"]:checked ~ .md-header .md-search__form {
  border-color: #000000;
  border-radius: 2px;
}

.md-search__input {
  color: #1a1a1a;
}

.md-search__input::placeholder {
  color: #808080;
}

.md-search__output {
  border-radius: 0 0 2px 2px;
}

[data-md-color-scheme="slate"] .md-header {
  background-color: #1a1a1a;
  border-bottom-color: #333333;
  color: #f7f8fa;
}

[data-md-color-scheme="slate"] .md-header__button.md-logo img {
  filter: invert(1);
}

[data-md-color-scheme="slate"] .md-search__form {
  background-color: #242424;
  border-color: #333333;
}

[data-md-color-scheme="slate"] .md-search__form:hover {
  background-color: #242424;
  border-color: #5a5a5a;
}

[data-md-color-scheme="slate"] .md-search__input {
  color: #f7f8fa;
}

[data-md-color-scheme="slate"] .md-search__input::placeholder {
  color: #808080;
}

[data-md-color-scheme="slate"]
  [data-md-toggle="search"]:checked
  ~ .md-header
  .md-search__form {
  border-color: #f7f8fa;
}

/* ------------------------------------------------------------ typography */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  color: var(--md-primary-fg-color);
  font-weight: 700;
}

/* ------------------------------------------------------------ buttons
   Primary = near-black fill, ghost = hairline outline; never chromatic. */
.md-typeset .md-button {
  border-radius: 2px;
  border-width: 1px;
  font-weight: 500;
}

.md-typeset .md-button--primary {
  background-color: #1a1a1a;
  border-color: #1a1a1a;
  color: #ffffff;
  box-shadow: rgba(0, 0, 0, 0.04) 0px 2px 4px 0px;
}

.md-typeset .md-button--primary:is(:focus, :hover) {
  background-color: #000000;
  border-color: #000000;
  color: #ffffff;
}

.md-typeset .md-button:not(.md-button--primary) {
  border-color: var(--md-primary-fg-color);
  color: var(--md-primary-fg-color);
}

.md-typeset .md-button:not(.md-button--primary):is(:focus, :hover) {
  background-color: var(--md-accent-fg-color--transparent);
  border-color: var(--md-primary-fg-color);
  color: var(--md-primary-fg-color);
}

[data-md-color-scheme="slate"] .md-typeset .md-button--primary {
  background-color: #ffffff;
  border-color: #ffffff;
  color: #1a1a1a;
}

[data-md-color-scheme="slate"]
  .md-typeset
  .md-button--primary:is(:focus, :hover) {
  background-color: #f7f8fa;
  border-color: #f7f8fa;
  color: #000000;
}

/* ------------------------------------------------------------ surfaces
   2px radii everywhere; hairline borders instead of shadows. */
.md-typeset pre > code,
.md-typeset .highlight,
.md-typeset .highlight > pre,
.md-typeset code {
  border-radius: 2px;
}

.md-typeset .admonition,
.md-typeset details {
  border-radius: 2px;
  box-shadow: none;
  border-width: 1px;
  border-left-width: 4px;
}

.md-typeset .tabbed-set > .tabbed-content,
.md-typeset .tabbed-labels > label {
  border-radius: 2px;
}

.md-typeset table:not([class]) {
  border-radius: 2px;
  box-shadow: none;
  border: 1px solid var(--md-default-fg-color--lightest);
}

.md-nav__link,
.md-search-result__link {
  border-radius: 2px;
}

.md-top {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 2px;
  box-shadow: rgba(0, 0, 0, 0.04) 0px 2px 4px 0px;
}

/* Keyboard keys (plain <kbd> in the sources — zensical's renderer ignores
   pymdownx.keys, so the ++key++ syntax is not used). */
.md-typeset kbd {
  background: var(--md-code-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 2px;
  box-shadow: none;
  color: var(--md-default-fg-color);
  font-size: 0.68em;
  padding: 0.1em 0.4em;
  vertical-align: 0.1em;
}

/* ------------------------------------------------------------ hero */
.hero {
  align-items: center;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1fr);
  margin: 1rem 0 2.5rem;
}

.md-grid {
  max-width: 82rem;
}

.md-typeset .hero__content h1 {
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
  line-height: 1.25;
  margin: 0.2rem 0 1rem;
}

.hero__lead {
  color: var(--md-default-fg-color--light);
  font-size: 1.05rem;
  max-width: 46rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

.md-typeset > p > .md-button + .md-button {
  margin-left: 0.6rem;
}

.hero__media {
  margin: 0;
}

.hero__media img {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 2px;
  box-shadow: var(--md-shadow-z2);
  display: block;
  width: 100%;
}

/* Uppercase typographic marker (Badge/Tag role): badge-slate, 0.08em
   tracking — same treatment as the marketing site's .kicker. */
.eyebrow {
  color: #6f6f6f;
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin: 0;
  text-transform: uppercase;
}

[data-md-color-scheme="slate"] .eyebrow {
  color: #a0a0a0;
}

/* Sidebar section headers (User Guide, Tutorials, Reference).
   Targets the internal Material nav classes that Zensical emits; tested against
   zensical 0.0.x. Re-verify these selectors after a major theme upgrade. */
.md-nav--primary .md-nav__item--section > .md-nav__link {
  border-top: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 0;
  color: #6f6f6f;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin-top: 1rem;
  opacity: 1;
  padding-top: 0.75rem;
  text-transform: uppercase;
}

[data-md-color-scheme="slate"]
  .md-nav--primary
  .md-nav__item--section
  > .md-nav__link {
  color: #a0a0a0;
}

/* Tighten the desktop sidebar nav only; the mobile drawer keeps its default touch targets. */
@media screen and (min-width: 76.25em) {
  .md-nav--primary .md-nav__item:not(.md-nav__item--section) {
    margin-top: 0;
  }

  .md-nav--primary .md-nav__link {
    margin-top: 0;
    padding-bottom: 0.2rem;
    padding-top: 0.2rem;
  }
}

/* ------------------------------------------------------------ cards */
.feature-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  margin: 1.5rem 0 2rem;
}

.feature-card {
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 2px;
  padding: 1rem;
}

.feature-card h3 {
  margin-top: 0;
}

/* Guide screenshots inside pages: hairline frame, 2px radius, no shadow. */
.md-typeset img {
  border-radius: 2px;
}

.md-typeset figure > img,
.md-typeset p > img:only-child {
  border: 1px solid var(--md-default-fg-color--lightest);
}

.md-typeset figcaption {
  color: var(--md-default-fg-color--light);
  font-size: 0.64rem;
  max-width: none;
}

@media screen and (min-width: 76.25em) {
  .hero {
    grid-template-columns: minmax(18rem, 0.9fr) minmax(20rem, 1.1fr);
  }
}

@media screen and (max-width: 30em) {
  .md-typeset > p > .md-button {
    display: block;
    text-align: center;
    width: 100%;
  }

  .md-typeset > p > .md-button + .md-button {
    margin-left: 0;
    margin-top: 0.6rem;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .md-button {
    text-align: center;
    width: 100%;
  }
}