/* Brand theme for Agentic Operating Patterns.
   Tokens mirror kalensr.com: charcoal paper, cool gray ink, one restrained
   signal-blue accent, thin-rule geometry, Inter + IBM Plex Mono.
   Applied through Material for MkDocs CSS custom properties. */

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

:root {
  --brand-signal-dark: #4fadef;        /* oklch(0.72 0.13 242) */
  --brand-signal-dark-hover: #6dcfff;  /* oklch(0.82 0.13 240) */
  --brand-signal-light: #1277b7;       /* oklch(0.55 0.13 244) */
  --brand-signal-light-hover: #00508e; /* oklch(0.42 0.13 246) */
}

/* ------------------------------------------------------------ dark (slate) */

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #050609;
  --md-default-fg-color: #f0f3f7;
  --md-default-fg-color--light: #c7ced7;
  --md-default-fg-color--lighter: #8d97a6;
  --md-default-fg-color--lightest: rgba(240, 243, 247, 0.12);

  --md-primary-fg-color: #0a0d12;
  --md-primary-bg-color: #f0f3f7;
  --md-primary-bg-color--light: #c7ced7;

  --md-accent-fg-color: var(--brand-signal-dark-hover);
  --md-typeset-a-color: var(--brand-signal-dark);

  --md-code-bg-color: #10141b;
  --md-code-fg-color: #c7ced7;

  --md-footer-bg-color: #0a0d12;
  --md-footer-bg-color--dark: #050609;

  /* Rules and hairlines */
  --brand-rule: rgba(240, 243, 247, 0.12);
  --brand-rule-strong: rgba(240, 243, 247, 0.28);
  --brand-panel: #10141b;
  --brand-signal: var(--brand-signal-dark);
  --brand-signal-surface: rgba(79, 173, 239, 0.16);

  /* Mermaid diagrams follow the scheme */
  --md-mermaid-font-family: "Inter", system-ui, sans-serif;
  --md-mermaid-node-bg-color: #10141b;
  --md-mermaid-node-fg-color: #f0f3f7;
  --md-mermaid-edge-color: #8d97a6;
  --md-mermaid-label-bg-color: #050609;
  --md-mermaid-label-fg-color: #c7ced7;
}

/* ---------------------------------------------------------- light (default) */

[data-md-color-scheme="default"] {
  --md-default-bg-color: #fbfcfd;
  --md-default-fg-color: #0b0d12;
  --md-default-fg-color--light: #2f3540;
  --md-default-fg-color--lighter: #68717f;
  --md-default-fg-color--lightest: rgba(11, 13, 18, 0.12);

  --md-primary-fg-color: #f4f7fa;
  --md-primary-bg-color: #0b0d12;
  --md-primary-bg-color--light: #2f3540;

  --md-accent-fg-color: var(--brand-signal-light-hover);
  --md-typeset-a-color: var(--brand-signal-light);

  --md-code-bg-color: rgba(11, 13, 18, 0.06);
  --md-code-fg-color: #2f3540;

  --md-footer-bg-color: #eef3f7;
  --md-footer-bg-color--dark: #f4f7fa;
  --md-footer-fg-color: #2f3540;
  --md-footer-fg-color--light: #68717f;

  --brand-rule: rgba(11, 13, 18, 0.12);
  --brand-rule-strong: rgba(11, 13, 18, 0.28);
  --brand-panel: #eef3f7;
  --brand-signal: var(--brand-signal-light);
  --brand-signal-surface: rgba(18, 119, 183, 0.10);

  --md-mermaid-font-family: "Inter", system-ui, sans-serif;
  --md-mermaid-node-bg-color: #eef3f7;
  --md-mermaid-node-fg-color: #0b0d12;
  --md-mermaid-edge-color: #68717f;
  --md-mermaid-label-bg-color: #fbfcfd;
  --md-mermaid-label-fg-color: #2f3540;
}

/* ------------------------------------------------------------------ header */

.md-header {
  border-bottom: 1px solid var(--brand-rule);
  box-shadow: none;
}

/* In the light scheme the header is pale, so the white mark inverts to
   near-charcoal. currentColor cannot cross an img boundary. */
[data-md-color-scheme="default"] .md-header .md-logo img,
[data-md-color-scheme="default"] .md-nav__button.md-logo img {
  filter: invert(0.86);
}

[data-md-color-scheme="default"] .md-header,
[data-md-color-scheme="default"] .md-tabs {
  color: #0b0d12;
}

/* Search field: hairline treatment instead of tinted block */
.md-search__form {
  border: 1px solid var(--brand-rule);
  border-radius: 2px;
}

/* -------------------------------------------------------------- typography */

.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Mono eyebrow utility for metadata lines */
.md-typeset .eyebrow {
  font-family: var(--md-code-font-family);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--lighter);
}

/* ------------------------------------------------------------------- rules */

.md-typeset hr {
  border-bottom: 1px solid var(--brand-rule);
}

/* Tables: hairline geometry, mono headers, no heavy stripes */
.md-typeset table:not([class]) {
  border: 1px solid var(--brand-rule);
  border-radius: 2px;
  box-shadow: none;
}

.md-typeset table:not([class]) th {
  font-family: var(--md-code-font-family);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--md-default-fg-color--lighter);
  background: transparent;
  border-bottom: 1px solid var(--brand-rule-strong);
}

.md-typeset table:not([class]) td {
  border-top: 1px solid var(--brand-rule);
}

/* ------------------------------------------------------------- admonitions */

/* Thin-rule treatment: hairline frame, flat surface, quiet geometry.
   The 2px signal left rule is applied per type below, so semantic types
   keep their own left-rule color from Material. */
.md-typeset .admonition,
.md-typeset details {
  border: 1px solid var(--brand-rule);
  border-left-width: 2px;
  border-radius: 2px;
  box-shadow: none;
  background: transparent;
}

.md-typeset .admonition.note,
.md-typeset .admonition.leaders,
.md-typeset details.note {
  border-left: 2px solid var(--brand-signal);
}

/* Recolor only the types this site uses today, so a future warning or
   danger admonition keeps Material's semantic color and icon tint. */
.md-typeset .admonition.note > .admonition-title,
.md-typeset .admonition.leaders > .admonition-title,
.md-typeset details.note > summary {
  background: var(--brand-signal-surface);
  font-weight: 600;
}

.md-typeset .admonition.note > .admonition-title::before,
.md-typeset .admonition.leaders > .admonition-title::before,
.md-typeset details.note > summary::before {
  background-color: var(--brand-signal);
}

/* “For leaders” custom admonition: same geometry, human icon. */
.md-typeset .admonition.leaders {
  border-left-color: var(--brand-signal);
}

.md-typeset .leaders > .admonition-title::before {
  -webkit-mask-image: var(--md-admonition-icon--leaders);
  mask-image: var(--md-admonition-icon--leaders);
}

:root {
  --md-admonition-icon--leaders: url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8zm0 10c4.42 0 8 1.79 8 4v2H4v-2c0-2.21 3.58-4 8-4z"/></svg>');
}

/* ------------------------------------------------------------------- links */

.md-typeset a {
  text-underline-offset: 3px;
}

/* ------------------------------------------------------------------ heroes */

/* Page hero images: full-width band under the H1, scheme-paired. */
.md-typeset .page-hero {
  display: block;
  margin: 0.4rem 0 1.4rem;
  border: 1px solid var(--brand-rule);
  border-radius: 2px;
  overflow: hidden;
  line-height: 0;
}

.md-typeset .page-hero img {
  width: 100%;
  max-height: 230px;
  object-fit: cover;
  display: none;
}

[data-md-color-scheme="slate"] .page-hero img.hero-dark { display: block; }
[data-md-color-scheme="default"] .page-hero img.hero-light { display: block; }