/* Owned by docs/_includes/footer.html: its two small print lines. */
.footer-note { font-size: 0.85rem; color: var(--inverse-muted); line-height: 1.7; }
.footer-disclaimer { font-size: 0.82rem; color: var(--inverse-muted); line-height: 1.7; margin-top: 0.75rem; }
/* Owned by docs/_includes/nav.html: the sticky nav must not cover a #fragment target. */
html { scroll-padding-top: 80px; }
/* Every page loads base.css, so it picks a diagram's twin from data-theme, the attribute the
   toggle sets. Both selectors outrank the pages' .diagram img { display: block }. */
:root:not([data-theme="dark"]) .diagram-dark, [data-theme="dark"] .diagram-light { display: none; }
/* A diagram is drawn on the canvas: on a surface section its surface cards would vanish. */
figure.diagram img { background: var(--canvas); border-radius: var(--radius-md); }
/* It also owns the phone rule for diagrams: a diagram keeps its
   designed size and scrolls inside its figure. figure.diagram outranks the pages' own
   .diagram img { max-width: 100% }, which loads later. */
@media (max-width: 640px) {
  .diagram { overflow-x: auto; }
  figure.diagram img { max-width: none; }
}

/* ── Shared by every page: reset, nav, footer ───────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul, ol { list-style: none; }
[data-theme="light"] { color-scheme: only light; }
[data-theme="dark"] { color-scheme: dark; }

a { color: inherit; text-decoration: none; }
h1, h2, h3 { text-wrap: balance; }
table, code, pre { font-variant-numeric: tabular-nums; }

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background var(--duration-mid) ease, color var(--duration-mid) ease;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--accent);
  color: var(--accent-ink);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  z-index: 9999;
}
.skip-link:focus { top: var(--space-4); }

/* ── Navigation ──────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  box-shadow: 0 1px 3px color-mix(in srgb, var(--inverse) 8%, transparent);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-8);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  flex-shrink: 0;
}
/* K3, drawn inline by nav.html and footer.html; it takes the wordmark's colour. */
.mark { fill: currentColor; flex: none; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav-links a {
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  transition: color var(--duration-fast) ease;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--accent); }
.nav-cta {
  padding: var(--space-2) var(--space-4) !important;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 50%, transparent) !important;
  color: var(--accent) !important;
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) ease !important;
}
.nav-cta:hover { background: var(--accent-dim) !important; color: var(--accent-strong) !important; }
.nav-actions { display: flex; align-items: center; gap: var(--space-4); flex-shrink: 0; }
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  box-shadow: 0 0 0 1px var(--hairline-strong);
  border-radius: var(--radius-md);
  color: var(--muted);
  transition: color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}
.theme-toggle:hover { color: var(--ink); box-shadow: 0 0 0 1px var(--muted); }
.theme-toggle svg { width: 16px; height: 16px; }
.icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  color: var(--body);
}
.nav-toggle span { display: block; width: 20px; height: 1.5px; background: currentColor; }

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--inverse);
  color: var(--inverse-muted);
  padding: var(--space-16) var(--space-8) var(--space-8);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
  padding-bottom: var(--space-10);
  border-bottom: 1px solid color-mix(in srgb, var(--inverse-ink) 8%, transparent);
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--inverse-ink);
  margin-bottom: var(--space-4);
}
.footer-logo .mark { color: var(--inverse-ink); opacity: 0.5; }
.footer-tagline {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--inverse-muted);
  line-height: 1.6;
  max-width: 32ch;
}
.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--inverse-muted);
  margin-bottom: var(--space-5);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--inverse-muted);
  transition: color var(--duration-fast) ease;
}
.footer-links a:hover { color: var(--inverse-ink); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: var(--inverse-muted);
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-bottom a {
  color: var(--inverse-muted);
  transition: color var(--duration-fast) ease;
}
.footer-bottom a:hover { color: var(--inverse-ink); }

/* ── Callout: one component on every page type ──────────────── */
.callout { padding: var(--space-4) var(--space-6); margin: var(--space-6) 0; border-left: 3px solid; border-radius: 0 var(--radius-md) var(--radius-md) 0; }
.callout-note { background: var(--accent-fog); border-color: var(--accent); }
.callout-warn { background: var(--warning-fog); border-color: var(--warning); }
/* Two classes deep: these outrank the page types' prose rules (.docs-section p, .article-body p). */
.callout .callout-title { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase; line-height: 1.7; margin-bottom: var(--space-2); }
.callout-note .callout-title { color: var(--accent); }
.callout-warn .callout-title { color: var(--warning); }
.callout p:not(.callout-title) { font-size: 0.9rem; color: var(--body); line-height: 1.7; max-width: 70ch; margin-bottom: 0; }

/* ── Responsive ─────────────────────────────────────────────── */
/* Nav collapses at 1080px, not 768px: at 1024px the full item list no
   longer fits the nav-inner row and overflows the viewport
   horizontally. */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    padding: var(--space-5) var(--space-6);
    gap: var(--space-4);
    z-index: 201;
  }
  .nav-toggle { display: flex; }
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ── Motion ─────────────────────────────────────────────────── */
/* The one page-load reveal (DESIGN.md "Motion": rise ~10px, fade ~0.5s). */
@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
/* With reduced motion, state changes are instant (DESIGN.md "Motion"); the app's rule. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Borders are drawn as box-shadow rings (DESIGN.md "Rules"); forced colours drop shadows, so the edges come back. */
@media (forced-colors: active) {
  .theme-toggle, .btn-outline, .nav-cta, .feature-card, .compliance-card, .install-reqs,
  details.faq-item, .article-card, .step-block, .article-cta, .terminal-window,
  .code-block, .article-body pre, .doc-shot img, .btn-primary, .compliance-card-badge, .feature-icon-wrap, .trust-item-check,
  .docs-section code, .env-req-yes, .env-req-no, code, details.faq-item[open] { border: 1px solid CanvasText; }
  /* A code block is framed once: its lines are not inline code, whatever the list above matches. */
  pre code, .docs-section pre code { border: none; }
}