/* HRD Labs — unified article theme.
   Loaded after the Astro template CSS; overrides its variables so research
   articles share the main site's terminal look. Light by default, dark via
   [data-theme=dark] (same storage key as the rest of the site). */

:root,
[data-theme=light] {
  --page-bg: #ffffff;
  --surface-bg: #f2eee5;
  --text-color: #3c3a34;
  --muted-color: #6e6a5f;
  --border-color: #e6e1d5;
  --code-bg: #f0ece1;
  --primary-base: #a08343;
  --primary-color: #a08343;
  --on-primary: #ffffff;
  --transparent-page-contrast: rgba(255, 255, 255, .85);
  --link-underline: rgba(160, 131, 67, .45);
  --link-underline-hover: #a08343;
  --table-header-bg: #f0ece1;
  --table-row-odd-bg: #f5f2ea;
  --axis-color: #6e6a5f;
  --tick-color: #6e6a5f;
  --grid-color: rgba(60, 58, 52, .08);
  --default-font-family: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  /* site accents */
  --hrd-heading: #26241f;
  --hrd-faint: #928d7f;
  --hrd-tan: #a08343;
  --hrd-green: #66794f;
  --hrd-teal: #4f7a74;
  --hrd-cat: #4a463d;
  --hrd-frame: #d9d3c3;
  --hrd-shadow: #eae5d9;
  --hrd-chip: #d9d3c3;
  color-scheme: light;
}

[data-theme=dark] {
  --page-bg: #16213a;
  --surface-bg: #1c2846;
  --text-color: #c9d0dd;
  --muted-color: #9aa3b8;
  --border-color: #2a3552;
  --code-bg: #1a2540;
  --primary-base: #c4b28a;
  --primary-color: #c4b28a;
  --on-primary: #16213a;
  --transparent-page-contrast: rgba(22, 33, 58, .85);
  --link-underline: rgba(196, 178, 138, .45);
  --link-underline-hover: #c4b28a;
  --table-header-bg: #1a2540;
  --table-row-odd-bg: #192341;
  --axis-color: #a6a69c;
  --tick-color: #a6a69c;
  --grid-color: rgba(201, 208, 221, .08);
  --hrd-heading: #e9edf5;
  --hrd-faint: #6b7590;
  --hrd-tan: #c4b28a;
  --hrd-green: #8a9a7b;
  --hrd-teal: #8ea4a2;
  --hrd-cat: #e9edf5;
  --hrd-frame: #374466;
  --hrd-shadow: #0f1730;
  --hrd-chip: #374466;
  color-scheme: dark;
}

html,
body {
  background: var(--page-bg);
}

::selection {
  background: var(--hrd-tan);
  color: var(--page-bg);
}

h1, h2, h3, h4, h5, h6,
.hero-title {
  color: var(--hrd-heading);
}

/* Mono display type runs wide — size the title down so it sits on two lines */
.hero-title,
.hero-title[data-astro-cid-uzw5or4x] {
  font-size: clamp(26px, 4.6vw, 40px);
  letter-spacing: -0.01em;
  text-wrap: balance;
}

/* Mono runs wide in data tables — tighten so less horizontal scroll is needed */
main table {
  font-size: 13px;
}

/* Display equation, set as terminal text */
.hrd-eq {
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-color);
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 14px 18px;
  margin: 20px 0;
  text-align: center;
  overflow-x: auto;
  white-space: pre;
}

/* Callout accents, retuned to the site palette */
.note--info {
  border-left-color: var(--hrd-tan);
  background: color-mix(in oklab, var(--hrd-tan) 8%, var(--surface-bg));
}

.note--success {
  border-left-color: var(--hrd-green);
  background: color-mix(in oklab, var(--hrd-green) 8%, var(--surface-bg));
}

/* ---- HRD Labs terminal bar ---- */
.hrd-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-color);
  background: var(--page-bg);
}

.hrd-bar a {
  text-decoration: none;
}

.hrd-bar__home {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--hrd-heading);
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
}

.hrd-bar__home:hover {
  color: var(--hrd-tan);
}

.hrd-bar__cat {
  width: 23px;
  height: 28px;
  background-color: var(--hrd-cat);
  -webkit-mask: url("/assets/catgirl-light.svg") no-repeat center / contain;
  mask: url("/assets/catgirl-light.svg") no-repeat center / contain;
  flex-shrink: 0;
}

.hrd-bar__path {
  color: var(--hrd-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.hrd-bar__cursor {
  flex-shrink: 0;
  width: 8px;
  height: 15px;
  background: var(--hrd-tan);
  animation: hrd-blink 2.2s step-end infinite;
}

@keyframes hrd-blink {
  0%, 55% { opacity: 1; }
  55.01%, 100% { opacity: 0; }
}

.hrd-bar .theme-toggle {
  margin-left: auto;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: none;
  border: 1px solid var(--hrd-chip);
  border-radius: 2px;
  color: var(--muted-color);
  cursor: pointer;
  flex-shrink: 0;
}

.hrd-bar .theme-toggle:hover {
  color: var(--hrd-tan);
  border-color: var(--hrd-faint);
}

.theme-toggle .icon-sun { display: none; }
[data-theme=dark] .theme-toggle .icon-sun { display: block; }
[data-theme=dark] .theme-toggle .icon-moon { display: none; }

.hrd-bar__back {
  flex-shrink: 0;
  color: var(--hrd-teal);
}

.hrd-bar__back:hover {
  color: var(--hrd-tan);
}

@media (max-width: 560px) {
  .hrd-bar {
    padding: 14px 16px;
  }

  .hrd-bar__path,
  .hrd-bar__cursor {
    display: none;
  }
}

/* Keep the floating mobile TOC button clear of the terminal bar */
.toc-mobile-toggle {
  top: 76px;
}

/* ---- Hero demo video (replaces the old decorative banner) ---- */
.hero-banner,
.hero-banner[data-astro-cid-uzw5or4x] {
  aspect-ratio: auto;
  height: auto;
  overflow: visible;
}

.hero-demo {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
  margin: 0 auto;
}

.hero-demo video {
  display: block;
  width: 100%;
  border: 1px solid var(--hrd-frame);
  border-radius: 2px;
  background: #000;
  box-shadow: 6px 6px 0 var(--hrd-shadow);
}

.hero-demo__caption {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted-color);
  text-align: center;
  text-wrap: pretty;
}

@media (prefers-reduced-motion: reduce) {
  .hrd-bar__cursor {
    animation: none;
  }
}