/* ==========================================================================
   ghostrun docs — design tokens
   Same palette family as the README hero/mascot: cool ink + periwinkle glow,
   warm amber reserved for "this touched the network / pay attention" states.
   ========================================================================== */

:root {
  --ink: #0b0e1a;
  --ink-panel: #131a2e;
  --ink-panel-2: #0f1426;
  --ink-raised: #171f38;
  --hairline: #2a3155;
  --glow: #8b9dff;
  --glow-dim: #6b7bd6;
  --signal: #ffb066;
  --danger: #ff6b6b;
  --ok: #5fd0a0;
  --text: #e7eaff;
  --text-dim: #9aa4c7;
  --text-faint: #6b7396;

  --font-sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Consolas, "Liberation Mono", monospace;

  --header-h: 60px;
  --sidebar-w: 260px;
  --toc-w: 230px;
  --content-max: 760px;

  --radius: 8px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: light) {
  :root {
    --ink: #f7f8fc;
    --ink-panel: #ffffff;
    --ink-panel-2: #eef0fa;
    --ink-raised: #ffffff;
    --hairline: #dde1f5;
    --glow: #5b6bd6;
    --glow-dim: #4552ad;
    --signal: #d97a2e;
    --danger: #d64545;
    --ok: #2f9d6f;
    --text: #1c2340;
    --text-dim: #5a628c;
    --text-faint: #8790b8;
    --shadow: 0 8px 24px rgba(30, 40, 90, 0.1);
  }
}

:root[data-theme="dark"] {
  --ink: #0b0e1a;
  --ink-panel: #131a2e;
  --ink-panel-2: #0f1426;
  --ink-raised: #171f38;
  --hairline: #2a3155;
  --glow: #8b9dff;
  --glow-dim: #6b7bd6;
  --signal: #ffb066;
  --danger: #ff6b6b;
  --ok: #5fd0a0;
  --text: #e7eaff;
  --text-dim: #9aa4c7;
  --text-faint: #6b7396;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

:root[data-theme="light"] {
  --ink: #f7f8fc;
  --ink-panel: #ffffff;
  --ink-panel-2: #eef0fa;
  --ink-raised: #ffffff;
  --hairline: #dde1f5;
  --glow: #5b6bd6;
  --glow-dim: #4552ad;
  --signal: #d97a2e;
  --danger: #d64545;
  --ok: #2f9d6f;
  --text: #1c2340;
  --text-dim: #5a628c;
  --text-faint: #8790b8;
  --shadow: 0 8px 24px rgba(30, 40, 90, 0.1);
}

/* ==========================================================================
   Reset / base
   ========================================================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--glow);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 2px;
}

img {
  max-width: 100%;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.brand:hover {
  text-decoration: none;
}
.brand img {
  width: 26px;
  height: 26px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  color: var(--text);
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex: none;
}

.header-spacer {
  flex: 1;
}

.search-wrap {
  position: relative;
  width: 100%;
  max-width: 340px;
}

.search-input {
  width: 100%;
  background: var(--ink-panel);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  color: var(--text);
  padding: 8px 12px 8px 34px;
  font-size: 14px;
  font-family: var(--font-sans);
}
.search-input::placeholder {
  color: var(--text-faint);
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
  pointer-events: none;
}

.search-results {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--ink-raised);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-height: 60vh;
  overflow-y: auto;
  display: none;
  z-index: 200;
}
.search-results.open {
  display: block;
}
.search-result {
  display: block;
  padding: 10px 14px;
  border-bottom: 1px solid var(--hairline);
  color: var(--text);
}
.search-result:last-child {
  border-bottom: none;
}
.search-result:hover,
.search-result.active {
  background: var(--ink-panel-2);
  text-decoration: none;
}
.search-result .result-title {
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.search-result .result-crumb {
  font-size: 11px;
  color: var(--text-faint);
  font-weight: 400;
}
.search-result .result-excerpt {
  font-size: 12.5px;
  color: var(--text-dim);
  margin-top: 2px;
}
.search-empty {
  padding: 14px;
  font-size: 13px;
  color: var(--text-faint);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: none;
}

.icon-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-dim);
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.icon-btn:hover {
  border-color: var(--hairline);
  color: var(--text);
}
.icon-btn svg {
  width: 18px;
  height: 18px;
}
:root[data-theme="light"] .icon-moon {
  display: none;
}
:root[data-theme="dark"] .icon-sun {
  display: none;
}

/* ==========================================================================
   Layout shell
   ========================================================================== */

.shell {
  margin-top: var(--header-h);
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 1200px) {
  .shell {
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  }
  .toc {
    display: none;
  }
}

@media (max-width: 960px) {
  .shell {
    grid-template-columns: minmax(0, 1fr);
  }
  .sidebar {
    position: fixed;
    left: -280px;
    top: var(--header-h);
    bottom: 0;
    width: 260px;
    transition: left 0.18s ease;
    z-index: 90;
    background: var(--ink);
    box-shadow: var(--shadow);
  }
  .sidebar.open {
    left: 0;
  }
  .nav-toggle {
    display: flex;
  }
  .scrim {
    display: none;
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 80;
  }
  .scrim.open {
    display: block;
  }
}

/* ==========================================================================
   Sidebar
   ========================================================================== */

.sidebar {
  border-right: 1px solid var(--hairline);
  padding: 24px 16px 40px;
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  position: sticky;
  top: var(--header-h);
}

.side-group {
  margin-bottom: 22px;
}

.side-group-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 0 10px;
  margin-bottom: 6px;
}

.side-link {
  display: block;
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.4;
}
.side-link:hover {
  background: var(--ink-panel-2);
  color: var(--text);
  text-decoration: none;
}
.side-link.active {
  background: var(--ink-panel-2);
  color: var(--glow);
  font-weight: 600;
  box-shadow: inset 2px 0 0 var(--glow);
}

/* ==========================================================================
   Main content / article prose
   ========================================================================== */

.main {
  min-width: 0;
  padding: 32px 32px 80px;
  display: flex;
  justify-content: center;
}

.article {
  width: 100%;
  max-width: var(--content-max);
}

.breadcrumb {
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 10px;
}
.breadcrumb a {
  color: var(--text-faint);
}

.article h1 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  text-wrap: balance;
}

.article .lede {
  font-size: 17px;
  color: var(--text-dim);
  margin-bottom: 28px;
}

.article h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 40px 0 14px;
  padding-top: 8px;
  border-top: 1px solid var(--hairline);
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.article h2:first-of-type {
  border-top: none;
  margin-top: 28px;
}

.article h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 26px 0 10px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.article p {
  margin: 0 0 16px;
}

.article ul,
.article ol {
  margin: 0 0 16px;
  padding-left: 22px;
}
.article li {
  margin-bottom: 6px;
}
.article li > ul,
.article li > ol {
  margin-top: 6px;
}

.article strong {
  color: var(--text);
  font-weight: 700;
}

.article code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--ink-panel-2);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 1.5px 5px;
  color: var(--glow);
}

.article pre {
  position: relative;
  background: var(--ink-panel);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0 0 20px;
}
.article pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 13.5px;
  line-height: 1.6;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--ink-panel-2);
  border: 1px solid var(--hairline);
  color: var(--text-faint);
  font-family: var(--font-sans);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.12s ease;
}
.article pre:hover .copy-btn {
  opacity: 1;
}
.copy-btn:hover {
  color: var(--text);
  border-color: var(--glow);
}
.copy-btn.copied {
  color: var(--ok);
  border-color: var(--ok);
  opacity: 1;
}

.article blockquote {
  margin: 0 0 20px;
  padding: 2px 18px;
  border-left: 3px solid var(--hairline);
  color: var(--text-dim);
}

.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 24px;
  font-size: 14px;
}
.article th,
.article td {
  border: 1px solid var(--hairline);
  padding: 9px 12px;
  text-align: left;
  vertical-align: top;
}
.article th {
  background: var(--ink-panel-2);
  font-weight: 700;
  font-size: 12.5px;
  letter-spacing: 0.01em;
}
.article .table-scroll {
  overflow-x: auto;
  margin: 0 0 24px;
}
.article .table-scroll table {
  margin-bottom: 0;
}

.article hr {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 32px 0;
}

/* Callouts */
.callout {
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--glow);
  background: var(--ink-panel-2);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 0 0 22px;
  font-size: 15px;
}
.callout p:last-child {
  margin-bottom: 0;
}
.callout-label {
  display: block;
  font-weight: 700;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--glow);
}
.callout.warning {
  border-left-color: var(--signal);
}
.callout.warning .callout-label {
  color: var(--signal);
}
.callout.danger {
  border-left-color: var(--danger);
}
.callout.danger .callout-label {
  color: var(--danger);
}

/* Prev/next footer nav */
.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--hairline);
}
.page-nav a {
  flex: 1;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text);
}
.page-nav a:hover {
  border-color: var(--glow);
  text-decoration: none;
}
.page-nav .dir {
  display: block;
  font-size: 11px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 3px;
}
.page-nav .next {
  text-align: right;
  margin-left: auto;
}

.edit-link {
  font-size: 13px;
  margin-top: 28px;
}

/* ==========================================================================
   TOC (right rail)
   ========================================================================== */

.toc {
  padding: 32px 20px;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
}
.toc-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}
.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.toc li {
  margin-bottom: 4px;
}
.toc a {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  padding: 3px 0 3px 12px;
  border-left: 2px solid transparent;
}
.toc a:hover {
  color: var(--text);
  text-decoration: none;
}
.toc a.active {
  color: var(--glow);
  border-left-color: var(--glow);
  font-weight: 600;
}
.toc .toc-h3 {
  padding-left: 24px;
  font-size: 12.5px;
}

/* ==========================================================================
   Home page
   ========================================================================== */

.home-hero {
  text-align: center;
  padding: 60px 20px 20px;
  max-width: 720px;
  margin: 0 auto;
}
.home-hero img.hero-gif {
  width: 100%;
  max-width: 560px;
  border-radius: 12px;
  margin-bottom: 28px;
}
.home-hero h1 {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  text-wrap: balance;
}
.home-hero p.tagline {
  font-size: 17px;
  color: var(--text-dim);
  margin: 0 0 28px;
}
.home-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 14.5px;
  border: 1px solid var(--hairline);
}
.btn:hover {
  text-decoration: none;
}
.btn-primary {
  background: var(--glow);
  color: var(--ink);
  border-color: var(--glow);
}
.btn-primary:hover {
  background: var(--glow-dim);
  border-color: var(--glow-dim);
}
.btn-ghost {
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--glow);
}

.home-grid {
  max-width: 960px;
  margin: 56px auto 0;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.home-card {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--ink-panel);
}
.home-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.home-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-dim);
}
.home-card a {
  font-size: 13px;
  font-weight: 600;
}

.home-quickstart {
  max-width: 720px;
  margin: 56px auto 40px;
  padding: 0 20px;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  text-align: center;
  padding: 40px 20px 60px;
  color: var(--text-faint);
  font-size: 13px;
}
.site-footer a {
  color: var(--text-faint);
}