/* =============================================================================
   Atlas docs — "Clean Systems" design system
   Dark-first, dual-theme via [data-md-color-scheme]. Airy layout, hairline
   borders, one calm blue accent. Semantic admonition colors (note/tip/
   warning/danger) are Material's own per-type hues and are left untouched —
   they stay separate from the accent by design.
   ============================================================================= */

:root {
  --atlas-radius: 10px;
  --atlas-radius-sm: 6px;
  --atlas-content-measure: 48rem;
  --atlas-shadow-soft: 0 1px 2px rgba(15, 23, 42, 0.06);
}

/* -----------------------------------------------------------------------
   Tokens — Light (`default`)
   ----------------------------------------------------------------------- */
[data-md-color-scheme="default"] {
  --atlas-bg: #ffffff;
  --atlas-surface: #f8fafc;
  --atlas-text: #0f172a;
  --atlas-muted: #5b6472;
  --atlas-border: #e6e9ef;
  --atlas-accent: #2563eb;
  --atlas-accent-hover: #1d4ed8;
  --atlas-link: #1d4ed8;
  --atlas-code-bg: #0f172a;
  --atlas-code-fg: #e2e8f0;

  --md-default-bg-color: var(--atlas-bg);
  --md-default-fg-color: var(--atlas-text);
  --md-default-fg-color--light: var(--atlas-muted);
  --md-default-fg-color--lighter: color-mix(in srgb, var(--atlas-muted) 55%, transparent);
  --md-default-fg-color--lightest: color-mix(in srgb, var(--atlas-muted) 25%, transparent);

  --md-primary-fg-color: var(--atlas-bg);
  --md-primary-bg-color: var(--atlas-text);

  --md-accent-fg-color: var(--atlas-accent);
  --md-accent-fg-color--transparent: color-mix(in srgb, var(--atlas-accent) 12%, transparent);

  --md-typeset-a-color: var(--atlas-link);
  --md-typeset-table-color: var(--atlas-border);

  --md-code-bg-color: var(--atlas-code-bg);
  --md-code-fg-color: var(--atlas-code-fg);

  --md-admonition-bg-color: var(--atlas-surface);
}

/* -----------------------------------------------------------------------
   Tokens — Dark (`slate`) — a true equal, not an inversion of light
   ----------------------------------------------------------------------- */
[data-md-color-scheme="slate"] {
  --atlas-bg: #0d1117;
  --atlas-surface: #161b22;
  --atlas-text: #e6edf3;
  --atlas-muted: #8b949e;
  --atlas-border: #21262d;
  --atlas-accent: #5b8bff;
  --atlas-accent-hover: color-mix(in srgb, #5b8bff 80%, black);
  --atlas-link: #79a6ff;
  --atlas-code-bg: var(--atlas-surface);
  --atlas-code-fg: var(--atlas-text);

  --md-default-bg-color: var(--atlas-bg);
  --md-default-fg-color: var(--atlas-text);
  --md-default-fg-color--light: var(--atlas-muted);
  --md-default-fg-color--lighter: color-mix(in srgb, var(--atlas-muted) 45%, transparent);
  --md-default-fg-color--lightest: color-mix(in srgb, var(--atlas-muted) 20%, transparent);

  --md-primary-fg-color: var(--atlas-bg);
  --md-primary-bg-color: var(--atlas-text);

  --md-accent-fg-color: var(--atlas-accent);
  --md-accent-fg-color--transparent: color-mix(in srgb, var(--atlas-accent) 16%, transparent);

  --md-typeset-a-color: var(--atlas-link);
  --md-typeset-table-color: var(--atlas-border);

  --md-code-bg-color: var(--atlas-code-bg);
  --md-code-fg-color: var(--atlas-code-fg);

  --md-admonition-bg-color: var(--atlas-surface);
}

/* -----------------------------------------------------------------------
   Header + nav tabs — flat, hairline, no gradients
   ----------------------------------------------------------------------- */
.md-header {
  background-color: var(--md-primary-fg-color);
  border-bottom: 1px solid var(--atlas-border);
  box-shadow: none;
  color: var(--md-primary-bg-color);
}

.md-header--shadow {
  box-shadow: var(--atlas-shadow-soft);
}

.md-tabs {
  background-color: var(--md-primary-fg-color);
  border-bottom: 1px solid var(--atlas-border);
  color: var(--md-primary-bg-color);
}

.md-tabs__link {
  box-shadow: inset 0 -2px 0 0 transparent;
  transition: box-shadow 0.2s ease, opacity 0.25s;
}

.md-tabs__item--active .md-tabs__link,
.md-tabs__link:hover,
.md-tabs__link:focus {
  box-shadow: inset 0 -2px 0 0 var(--md-accent-fg-color);
}

.md-main {
  background-color: var(--md-default-bg-color);
}

/* -----------------------------------------------------------------------
   Layout — grid width + comfortable content measure
   ----------------------------------------------------------------------- */
.md-grid {
  max-width: min(92rem, calc(100vw - 2rem));
}

.md-content__inner {
  max-width: var(--atlas-content-measure);
}

.md-content--atlas-wide {
  display: block;
}

.md-content__inner:has(.md-content--atlas-wide),
.md-content__inner:has(.atlas-service-grid),
.md-content__inner:has(table) {
  max-width: none;
}

.md-main__inner:has(.atlas-home) .md-sidebar--secondary {
  display: none;
}

.md-main__inner:has(.atlas-home) .md-content {
  max-width: none;
}

/* -----------------------------------------------------------------------
   Headings
   ----------------------------------------------------------------------- */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  letter-spacing: 0;
}

.md-typeset h1,
.md-typeset h2 {
  text-wrap: balance;
}

.md-typeset h1 {
  color: var(--md-default-fg-color);
  font-weight: 700;
}

.md-typeset h2 {
  font-weight: 600;
}

/* -----------------------------------------------------------------------
   Tables — hairline borders, generous spacing
   ----------------------------------------------------------------------- */
.md-typeset table:not([class]) {
  border: 1px solid var(--atlas-border);
  border-radius: var(--atlas-radius-sm);
}

.md-typeset table:not([class]) th {
  background-color: var(--atlas-surface);
  border-bottom: 1px solid var(--atlas-border);
}

/* -----------------------------------------------------------------------
   Code + pre — rounded, token-driven background
   ----------------------------------------------------------------------- */
.md-typeset code {
  border-radius: var(--atlas-radius-sm);
}

.md-typeset pre > code {
  border: 1px solid var(--atlas-border);
  border-radius: var(--atlas-radius);
}

/* -----------------------------------------------------------------------
   Admonitions — thin left rule in the semantic color, calm background
   ----------------------------------------------------------------------- */
.md-typeset .admonition,
.md-typeset details {
  background-color: var(--md-admonition-bg-color);
  border-style: solid;
  border-width: 0 0 0 3px;
  border-radius: var(--atlas-radius-sm);
  box-shadow: none;
}

/* -----------------------------------------------------------------------
   Homepage hero (`docs/index.md`) — accent CTAs, calm kicker, airy grid
   ----------------------------------------------------------------------- */
.atlas-home {
  display: grid;
  gap: 2.5rem;
  margin: 1.5rem 0 3rem;
}

.atlas-home__hero {
  align-items: center;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(20rem, 0.85fr) minmax(24rem, 1.15fr);
}

.atlas-home__copy {
  max-width: 42rem;
}

.atlas-kicker {
  color: var(--atlas-muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.atlas-home__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.atlas-home__actions a {
  background-color: var(--atlas-accent);
  border: 1px solid var(--atlas-accent);
  border-radius: var(--atlas-radius-sm);
  color: #ffffff;
  display: inline-flex;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.atlas-home__actions a:hover,
.atlas-home__actions a:focus {
  background-color: var(--atlas-accent-hover);
  border-color: var(--atlas-accent-hover);
  color: #ffffff;
}

.atlas-home__media {
  margin: 0;
}

.atlas-home__media img,
.atlas-screenshot img,
.atlas-diagram img {
  border: 1px solid var(--atlas-border);
  border-radius: var(--atlas-radius);
  box-shadow: var(--atlas-shadow-soft);
}

.atlas-home__media img {
  width: 100%;
}

.atlas-screenshot {
  margin-top: 2rem;
}

@media screen and (max-width: 76rem) {
  .atlas-home__hero {
    grid-template-columns: 1fr;
  }
}

/* -----------------------------------------------------------------------
   Homepage — section rhythm for content below the hero
   ----------------------------------------------------------------------- */
.md-main__inner:has(.atlas-home) .md-typeset h2 {
  border-top: 1px solid var(--atlas-border);
  margin-top: 3rem;
  padding-top: 2.5rem;
}

.md-main__inner:has(.atlas-home) .md-typeset > p:has(+ .atlas-home__grid),
.md-main__inner:has(.atlas-home) .md-typeset > p:has(+ .atlas-home__quickstart) {
  color: var(--atlas-muted);
  max-width: 48rem;
}

/* -----------------------------------------------------------------------
   Homepage — capability / doc-map card grid
   ----------------------------------------------------------------------- */
.atlas-home__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr));
  margin: 1.5rem 0;
}

.atlas-card {
  background-color: var(--atlas-surface);
  border: 1px solid var(--atlas-border);
  border-radius: var(--atlas-radius);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem 1.4rem;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.atlas-card:hover,
.atlas-card:focus-within {
  border-color: var(--atlas-accent);
  box-shadow: var(--atlas-shadow-soft);
  transform: translateY(-2px);
}

.atlas-card__title {
  color: var(--atlas-text);
  font-weight: 600;
  margin: 0;
}

.atlas-card__body {
  color: var(--atlas-muted);
  flex-grow: 1;
  font-size: 0.92rem;
  margin: 0;
}

.atlas-card__link,
.atlas-card__link:visited {
  color: var(--atlas-link);
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 0.25rem;
  text-decoration: none;
}

.atlas-card__link:hover,
.atlas-card__link:focus {
  text-decoration: underline;
}

/* -----------------------------------------------------------------------
   Homepage — quick-start code moment
   ----------------------------------------------------------------------- */
.atlas-home__quickstart {
  background-color: var(--atlas-surface);
  border: 1px solid var(--atlas-border);
  border-radius: var(--atlas-radius);
  margin: 1.5rem 0;
  padding: 1.5rem 1.5rem 1.25rem;
}

.atlas-home__quickstart .md-typeset pre {
  margin: 0 0 1rem;
}

.atlas-home__quickstart p {
  color: var(--atlas-muted);
  font-size: 0.92rem;
  margin: 0;
}

.atlas-home__quickstart-link,
.atlas-home__quickstart-link:visited {
  color: var(--atlas-link);
  font-weight: 600;
}

/* -----------------------------------------------------------------------
   Homepage — topology strip
   ----------------------------------------------------------------------- */
.atlas-home__topology {
  margin: 1.5rem 0;
  text-align: center;
}

.atlas-home__topology img {
  background-color: var(--atlas-bg);
  border: 1px solid var(--atlas-border);
  border-radius: var(--atlas-radius);
  box-shadow: var(--atlas-shadow-soft);
  max-width: 100%;
}

.atlas-home__caption {
  color: var(--atlas-muted);
  font-size: 0.88rem;
  margin: 0.75rem auto 0;
  max-width: 40rem;
}