/* Throughline Docs — Golden Hour, dusk default / daybreak on light scheme. */

:root {
  color-scheme: dark;

  --bg: #38303E;
  --ground: linear-gradient(165deg, #322B38 0%, #453641 55%, #5C4344 100%);
  --panel: rgba(255, 255, 255, 0.07);
  --panel-2: rgba(255, 255, 255, 0.11);
  --panel-solid: color-mix(in srgb, var(--bg) 88%, #FFFFFF);
  --line: rgba(246, 239, 231, 0.14);
  --text: #F6EFE7;
  --muted: rgba(246, 239, 231, 0.82);
  --faint: rgba(246, 239, 231, 0.56);

  --green: #9CC89A;
  --red: #DDA194;
  --blue: #90B4CB;
  --amber: #E8B26E;
  --amber-dim: rgba(232, 178, 110, 0.16);
  --amber-strong: #F0C285;

  --shade: 0 18px 40px rgba(20, 12, 18, 0.35);

  --font-serif: ui-serif, Georgia, "Times New Roman", serif;
  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;

  --radius-panel: 18px;
  --radius-control: 12px;
  --radius-tight: 8px;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #F1EAE0;
    --ground: linear-gradient(165deg, #F5F0E7 0%, #EFE7DB 55%, #EBDCCB 100%);
    --panel: rgba(255, 255, 255, 0.60);
    --panel-2: rgba(255, 255, 255, 0.85);
    --panel-solid: color-mix(in srgb, var(--bg) 55%, #FFFFFF);
    --line: rgba(46, 40, 51, 0.13);
    --text: #2E2833;
    --muted: #625B66;
    --faint: #847C86;

    --green: #406C3F;
    --red: #9C3E2E;
    --blue: #2F6395;
    --amber: #7D5E0A;
    --amber-dim: rgba(125, 94, 10, 0.14);
    --amber-strong: #6B4F06;

    --shade: 0 18px 40px rgba(46, 40, 51, 0.12);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ground) fixed;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--amber-strong); text-decoration: underline; text-decoration-color: var(--amber-dim); text-underline-offset: 2px; }
a:hover { text-decoration-color: currentColor; }

/* ---------- banner ---------- */

.banner {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--amber-dim);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.banner-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.55rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.86rem;
  color: var(--text);
}

.banner-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber-strong);
}

/* ---------- top bar ---------- */

.topbar {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.4rem 1.25rem 0.4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--amber), var(--amber-strong));
  box-shadow: var(--shade);
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  letter-spacing: 0.01em;
}

/* ---------- layout shell ---------- */

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
}

.sidenav {
  flex: 0 0 220px;
  position: sticky;
  top: 4.2rem;
  align-self: flex-start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  padding: 0.9rem;
}

.sidenav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.15rem; }

.sidenav a {
  display: block;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-control);
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.sidenav a:hover { background: var(--panel-2); color: var(--text); }

.sidenav a.active {
  background: var(--amber-dim);
  color: var(--text);
  font-weight: 600;
}

.content { flex: 1 1 auto; min-width: 0; }

.prose { max-width: 700px; }

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

.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text);
  scroll-margin-top: 4.5rem;
}

.prose h1 { font-size: 2.1rem; margin: 0 0 1.1rem; }
.prose h2 { font-size: 1.5rem; margin: 2.4rem 0 0.9rem; padding-top: 0.4rem; border-top: 1px solid var(--line); }
.prose h1 + h2, .prose > h2:first-child { border-top: none; padding-top: 0; margin-top: 0.6rem; }
.prose h3 { font-size: 1.18rem; margin: 1.8rem 0 0.6rem; }
.prose h4 { font-size: 1.02rem; margin: 1.4rem 0 0.5rem; color: var(--muted); }

.prose p { margin: 0 0 1.05rem; color: var(--muted); }
.prose li { color: var(--muted); }
.prose strong { color: var(--text); }

.prose ul, .prose ol { margin: 0 0 1.05rem; padding-left: 1.4rem; }
.prose li { margin: 0.3rem 0; }
.prose li > ul, .prose li > ol { margin: 0.35rem 0 0.35rem; }

.prose hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 2.2rem 0;
}

.prose blockquote {
  margin: 0 0 1.05rem;
  padding: 0.7rem 1.1rem;
  border-left: 3px solid var(--amber);
  background: var(--panel);
  border-radius: 0 var(--radius-tight) var(--radius-tight) 0;
}

.prose blockquote p { margin: 0; color: var(--text); }

/* ---------- code ---------- */

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1em 0.4em;
}

.prose pre {
  margin: 0 0 1.2rem;
  padding: 1rem 1.1rem;
  background: var(--panel-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  overflow-x: auto;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.87em;
  line-height: 1.6;
  color: var(--text);
}

/* ---------- tables ---------- */

.table-wrap { overflow-x: auto; margin: 0 0 1.2rem; border: 1px solid var(--line); border-radius: var(--radius-panel); }

.prose table { border-collapse: collapse; width: 100%; font-size: 0.94rem; }

.prose th, .prose td {
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.prose thead th {
  background: var(--panel);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 600;
}

.prose tbody tr:last-child td { border-bottom: none; }
.prose td code, .prose th code { white-space: nowrap; }

/* ---------- footer ---------- */

.site-footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  color: var(--faint);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}

/* ---------- responsive: top nav below ~860px ---------- */

@media (max-width: 860px) {
  .shell { flex-direction: column; gap: 1.2rem; }

  .sidenav {
    position: static;
    width: 100%;
    padding: 0.6rem;
  }

  .sidenav ul { flex-direction: row; overflow-x: auto; gap: 0.3rem; }
  .sidenav a { white-space: nowrap; }

  .prose { max-width: 100%; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .prose h1 { font-size: 1.7rem; }
  .prose h2 { font-size: 1.3rem; }
}