/* engineering-os custom theme: an "infrastructure terminal" look.
   Dark, cool near-black canvas; cyan for infrastructure, amber for developers;
   IBM Plex Mono for system labels. Overrides Material's design tokens. */

:root {
  --eos-bg: #0b0e14;
  --eos-surface: #141924;
  --eos-surface-2: #10141d;
  --eos-border: #212736;
  --eos-cyan: #6fd0ee;
  --eos-cyan-dim: #3f7f92;
  --eos-amber: #e6ab5e;
  --eos-text: #c4ccd9;
  --eos-heading: #eaf0f7;
  --eos-muted: #6a7488;
}

/* ---- Dark scheme (the primary look) ---- */
[data-md-color-scheme="slate"] {
  --md-default-bg-color: var(--eos-bg);
  --md-default-fg-color: var(--eos-text);
  --md-default-fg-color--light: #97a0b2;
  --md-default-fg-color--lighter: var(--eos-muted);
  --md-default-fg-color--lightest: #2a3141;

  --md-primary-fg-color: #0d1017;
  --md-primary-bg-color: var(--eos-heading);
  --md-accent-fg-color: var(--eos-amber);

  --md-typeset-color: var(--eos-text);
  --md-typeset-a-color: var(--eos-cyan);
  --md-code-bg-color: var(--eos-surface-2);
  --md-code-fg-color: #d3dae6;

  --md-footer-bg-color: #0d1017;
  --md-footer-bg-color--dark: #090c11;
}

/* Headings: tighter, brighter, engineering-flavored */
[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: var(--eos-heading);
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Section headings get a small monospace cyan tick, like a prompt */
[data-md-color-scheme="slate"] .md-typeset h2::before {
  content: "";
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  margin-right: 0.5em;
  border-left: 2px solid var(--eos-cyan);
  border-bottom: 2px solid var(--eos-cyan);
  transform: translateY(-0.15em) rotate(-45deg);
  opacity: 0.7;
}

/* Header + nav: dark bar, cyan brand */
.md-header {
  background-color: #0d1017;
  border-bottom: 1px solid var(--eos-border);
}
.md-header__title,
.md-header__topic {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  letter-spacing: 0.02em;
}
[data-md-color-scheme="slate"] .md-tabs {
  background-color: #0d1017;
  border-bottom: 1px solid var(--eos-border);
}
[data-md-color-scheme="slate"] .md-tabs__link {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  opacity: 0.8;
}
[data-md-color-scheme="slate"] .md-tabs__link--active,
[data-md-color-scheme="slate"] .md-tabs__link:hover {
  color: var(--eos-cyan);
  opacity: 1;
}

/* Code + inline code read like a terminal */
[data-md-color-scheme="slate"] .md-typeset code,
[data-md-color-scheme="slate"] .md-typeset pre > code {
  border: 1px solid var(--eos-border);
  border-radius: 6px;
}
[data-md-color-scheme="slate"] .md-typeset :not(pre) > code {
  color: var(--eos-amber);
  background-color: var(--eos-surface-2);
  padding: 0.1em 0.4em;
}

/* Tables: quiet grid, cyan header rule */
[data-md-color-scheme="slate"] .md-typeset table:not([class]) {
  border: 1px solid var(--eos-border);
  border-radius: 8px;
  overflow: hidden;
}
[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background-color: var(--eos-surface);
  color: var(--eos-heading);
  border-bottom: 1px solid var(--eos-cyan-dim);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.74rem;
  letter-spacing: 0.02em;
}

/* Admonitions sit on the surface, not stark white */
[data-md-color-scheme="slate"] .md-typeset .admonition,
[data-md-color-scheme="slate"] .md-typeset details {
  background-color: var(--eos-surface);
  border-left-width: 3px;
  border-radius: 8px;
}

/* Light scheme keeps the accents, stays readable */
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #0d1017;
  --md-primary-bg-color: #f3f6fb;
  --md-accent-fg-color: #b9762a;
  --md-typeset-a-color: #1f7f9c;
}

/* ---------- shared utility: monospace eyebrow label ---------- */
.eos-eyebrow {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--eos-muted);
}

/* =====================================================================
   Signature component: the ownership-boundary diagram.
   Nested boxes: Infrastructure (cyan) contains the Application (amber).
   ===================================================================== */
.eos-boundary {
  --c-infra: var(--eos-cyan);
  --c-dev: var(--eos-amber);
  border: 1px dashed color-mix(in srgb, var(--c-infra) 45%, transparent);
  border-radius: 14px;
  padding: 1.4rem;
  background: linear-gradient(180deg, rgba(111, 208, 238, 0.04), transparent 60%);
  margin: 1.5rem 0;
}
.eos-layer {
  border: 1px solid color-mix(in srgb, var(--c-infra) 35%, var(--eos-border));
  border-radius: 12px;
  padding: 1.1rem 1.1rem 1.2rem;
  margin-top: 1rem;
  background: color-mix(in srgb, var(--c-infra) 6%, var(--eos-surface));
}
.eos-layer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.7rem;
}
.eos-layer__title {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: color-mix(in srgb, var(--c-infra) 80%, white);
}
.eos-tag {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.2em 0.7em;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--c-infra) 55%, transparent);
  color: color-mix(in srgb, var(--c-infra) 85%, white);
}
.eos-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.eos-chips span {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  padding: 0.32em 0.7em;
  border-radius: 7px;
  border: 1px solid color-mix(in srgb, var(--c-infra) 40%, var(--eos-border));
  color: var(--eos-text);
  background: var(--eos-surface-2);
}
/* the inner Application layer flips to the developer accent */
.eos-layer--dev {
  --c-infra: var(--c-dev);
}
.eos-note {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--eos-muted);
}