/* ────────────────────────────────────────────────────────────
   AgentLoop docs — shared styles

   Same aesthetic family as the marketing site (paper background,
   terracotta accent, Fraunces serif headlines, JetBrains Mono for
   code), but tuned for reading: tighter type scale, denser content,
   sidebar + main layout.
   ──────────────────────────────────────────────────────────── */

:root {
  --paper: #f4efe6;
  --paper-shade: #ebe4d6;
  --paper-deep: #e0d8c6;
  --ink: #1a1814;
  --ink-soft: #4a4339;
  --ink-faint: #8a7f6f;
  --rule: #d8cdba;
  --accent: #c14f2a;
  --accent-deep: #8e3818;
  --accent-soft: rgba(193, 79, 42, 0.08);
  --code-bg: #1a1814;
  --code-fg: #e8dfcf;

  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Inter Tight", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Consolas, monospace;

  --sidebar-w: 240px;
  --toc-w: 200px;
  --max-content: 760px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    radial-gradient(circle at 95% 5%, rgba(193, 79, 42, 0.02) 0%, transparent 35%),
    radial-gradient(circle at 0% 90%, rgba(193, 79, 42, 0.025) 0%, transparent 40%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3CfeColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.1 0 0 0 0 0.08 0 0 0 0.06 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: var(--paper); }

/* ─── top nav ─── */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 0;
}
.logo-mark {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 16px;
  margin-right: 6px;
  transform: translateY(1px);
}
.logo-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-left: 8px;
  padding: 2px 6px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  transform: translateY(-2px);
}
.topbar-links {
  display: flex;
  gap: 22px;
  align-items: center;
  font-size: 14px;
  color: var(--ink-soft);
}
.topbar-links a:hover { color: var(--accent); }
.topbar-cta {
  background: var(--ink);
  color: var(--paper) !important;
  padding: 8px 14px;
  border-radius: 2px;
  transition: background 0.2s;
}
.topbar-cta:hover { background: var(--accent) !important; }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rule);
  padding: 7px 9px;
  border-radius: 2px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

@media (max-width: 900px) {
  .topbar-links a:not(.topbar-cta) { display: none; }
  .menu-toggle { display: inline-block; }
  .logo-tag { display: none; }
}

/* ─── 3-column layout ─── */

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  gap: 48px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 2;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
    gap: 40px;
  }
  .toc-wrap { display: none; }
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0 24px;
  }
  .sidebar-wrap { display: none; }
  .sidebar-wrap.open { display: block; }
}

/* ─── left sidebar ─── */

.sidebar-wrap {
  padding: 40px 0 60px;
}
.sidebar {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  padding-right: 12px;
}
.sidebar-section {
  margin-bottom: 28px;
}
.sidebar-section-head {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 12px;
  font-weight: 500;
}
.sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}
.sidebar-list a {
  display: block;
  padding: 6px 10px;
  margin-left: -10px;
  font-size: 14px;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  transition: all 0.15s;
}
.sidebar-list a:hover {
  color: var(--ink);
}
.sidebar-list a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 500;
  background: var(--accent-soft);
}

@media (max-width: 900px) {
  .sidebar-wrap.open {
    padding: 24px 0;
    background: var(--paper-shade);
    border-bottom: 1px solid var(--rule);
    margin: 0 -24px 0;
    padding: 24px 24px 32px;
  }
  .sidebar { position: static; max-height: none; padding-right: 0; }
}

/* ─── main content ─── */

main.content {
  padding: 48px 0 96px;
  min-width: 0;
  max-width: var(--max-content);
}

.breadcrumb {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(36px, 4.5vw, 52px);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 18px;
}
h1 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

.lede {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 36px;
  max-width: 56ch;
}

h2 {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-top: 56px;
  margin-bottom: 14px;
  scroll-margin-top: 80px;
}
h2 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 500;
}
h2:first-of-type { margin-top: 36px; }

h3 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-top: 36px;
  margin-bottom: 12px;
  scroll-margin-top: 80px;
}

main.content p {
  margin-bottom: 16px;
  max-width: 64ch;
}
main.content p + p { margin-top: 0; }
main.content p code,
main.content li code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--paper-shade);
  padding: 1px 6px;
  border-radius: 2px;
  color: var(--ink);
  border: 1px solid var(--rule);
}
main.content a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  transition: border-color 0.2s;
}
main.content a:hover {
  border-bottom-color: var(--accent);
}

main.content ul,
main.content ol {
  margin-bottom: 16px;
  margin-left: 1.4em;
  max-width: 60ch;
}
main.content li {
  margin-bottom: 6px;
  padding-left: 4px;
}
main.content li::marker { color: var(--ink-faint); }

main.content strong { font-weight: 600; }
main.content em { font-style: italic; }

/* ─── code blocks ─── */

.codeblock {
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 3px;
  margin: 18px 0;
  position: relative;
  overflow: hidden;
}
.codeblock-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid rgba(232, 223, 207, 0.07);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #5d564a;
}
.codeblock-head .lang {
  color: #c4b9a4;
}
.copy-btn {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  background: none;
  border: 1px solid rgba(232, 223, 207, 0.15);
  color: #c4b9a4;
  padding: 4px 9px;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s;
}
.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.copy-btn.copied {
  border-color: #6a9b6a;
  color: #6a9b6a;
}
.codeblock pre {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  padding: 18px 16px;
  overflow-x: auto;
  white-space: pre;
}
.codeblock .kw { color: #d68d52; }
.codeblock .str { color: #c1a875; }
.codeblock .fn { color: #e8dfcf; font-weight: 500; }
.codeblock .cmt { color: #5d564a; font-style: italic; }
.codeblock .num { color: #c1a875; }
.codeblock .name { color: #c14f2a; }

/* ─── tabs (for quickstart) ─── */

.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}
.tab {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  background: none;
  border: none;
  padding: 8px 14px;
  cursor: pointer;
  color: var(--ink-faint);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.2s;
}
.tab:hover { color: var(--ink); }
.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ─── callouts ─── */

.callout {
  margin: 22px 0;
  padding: 16px 20px;
  background: var(--paper-shade);
  border-left: 3px solid var(--accent);
  border-radius: 0 3px 3px 0;
  font-size: 14.5px;
}
.callout-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
  font-weight: 500;
}
.callout p { margin-bottom: 0 !important; max-width: none !important; }
.callout p + p { margin-top: 10px !important; }

/* ─── cards / lists of patterns ─── */

.card-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 22px 0;
}
.card {
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 18px 22px;
  background: var(--paper);
}
.card-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.card-meta {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}
.card-meta strong {
  color: var(--ink);
  font-weight: 600;
}
.card .codeblock {
  margin-top: 14px;
  margin-bottom: 0;
}

/* ─── guardrail rows ─── */

.guardrail {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 14px 18px;
  margin-bottom: 10px;
}
.guardrail-info {
  flex: 1;
  min-width: 0;
}
.guardrail-name {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 4px;
}
.guardrail-desc {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.5;
}
.badge {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 2px;
  flex-shrink: 0;
  white-space: nowrap;
}
.badge-active {
  background: rgba(74, 124, 74, 0.1);
  color: #4a7c4a;
  border: 1px solid rgba(74, 124, 74, 0.4);
}
.badge-sdk {
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(193, 79, 42, 0.4);
}

/* ─── ASCII diagram block ─── */

.ascii {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.55;
  background: var(--paper-shade);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 22px 0;
  color: var(--ink-soft);
  white-space: pre;
}

/* ─── right TOC ─── */

.toc-wrap {
  padding: 48px 0 60px;
}
.toc {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.toc-head {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 12px;
  font-weight: 500;
}
.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}
.toc-list a {
  display: block;
  padding: 4px 10px;
  margin-left: -10px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  transition: all 0.15s;
}
.toc-list a:hover { color: var(--ink); }
.toc-list a.active {
  color: var(--accent);
  border-left-color: var(--accent);
}
.toc-list .toc-sub {
  padding-left: 22px;
  font-size: 12.5px;
}

/* ─── page footer ─── */

.page-footer {
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.page-footer-meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
}
.page-footer-nav {
  display: flex;
  gap: 8px;
}
.next-link {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  padding: 8px 14px;
  border-radius: 2px;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.next-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.next-link .arrow { transition: transform 0.2s; }
.next-link:hover .arrow { transform: translateX(3px); }

/* ─── bottom footer ─── */

footer.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 0;
  padding: 28px 0 32px;
}
.site-footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.site-footer-links {
  display: flex;
  gap: 22px;
  font-size: 13px;
  color: var(--ink-soft);
}
.site-footer-links a:hover { color: var(--accent); }