@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

@import './tokens.css';
@import './components/header.css';
@import './components/footer.css';
@import './components/hero.css';
@import './components/code.css';
@import './components/checkbox.css';
@import './components/accordion.css';
@import './components/table.css';
@import './components/mermaid.css';
@import './components/inline-code.css';

/* ── Reset & Base ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

/* Baseline heading reset so no heading is ever invisible */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  padding: 0;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-indigo);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1.5rem);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-page);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

img, svg { max-width: 100%; display: block; }

/* ── Skip link ─────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 9999;
  width: auto;
  height: auto;
  padding: 0.75rem 1.25rem;
  background: var(--color-indigo);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
}

/* ── Page layout ───────────────────────────────────────────────────────── */
.page-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--space-xl) clamp(1rem, 4vw, 2.5rem);
  width: 100%;
}

/* Full-width single-column content — no sidebar column wasting space */
.content-layout {
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--space-xl) clamp(1rem, 4vw, 2.5rem);
}

.content-body {
  width: 100%;
}

/* ── Typography ────────────────────────────────────────────────────────── */
.content-body h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--color-indigo);
  line-height: 1.2;
  margin: 0 0 var(--space-lg);
  letter-spacing: -0.02em;
}

.content-body h2 {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--color-indigo);
  margin: var(--space-2xl) 0 var(--space-md);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-lavender-lt);
  letter-spacing: -0.01em;
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

.content-body h3 {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 700;
  color: var(--color-plum);
  margin: var(--space-xl) 0 var(--space-sm);
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

.content-body h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin: var(--space-lg) 0 var(--space-sm);
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

.content-body p {
  margin: 0 0 var(--space-md);
  color: var(--text-primary);
}

.content-body a {
  color: var(--color-indigo-light);
  text-decoration: underline;
  text-decoration-color: var(--color-lavender-md);
  text-underline-offset: 3px;
  transition: color var(--transition), text-decoration-color var(--transition);
}
.content-body a:hover {
  color: var(--color-indigo);
  text-decoration-color: var(--color-indigo);
}

.content-body ul,
.content-body ol {
  margin: 0 0 var(--space-md);
  padding-left: 1.5rem;
}
.content-body li { margin-bottom: 0.375rem; }

.content-body blockquote {
  border-left: 4px solid var(--color-lavender-md);
  background: var(--bg-accent);
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
}
.content-body blockquote p { margin: 0; }

.content-body strong { color: var(--color-indigo); font-weight: 700; }

.content-body hr {
  border: none;
  border-top: 2px solid var(--border-color);
  margin: var(--space-2xl) 0;
}

/* ── Section heading link anchors ──────────────────────────────────────── */
/* ariaHidden permalink: renders as <a class="header-anchor" aria-hidden="true">#</a> BEFORE the heading text */
.content-body .header-anchor {
  text-decoration: none;
  opacity: 0;
  margin-right: 0.4em;
  color: var(--color-lavender-md);
  transition: opacity var(--transition);
  font-size: 0.8em;
  font-weight: 400;
  user-select: none;
}
.content-body h2:hover .header-anchor,
.content-body h3:hover .header-anchor,
.content-body h4:hover .header-anchor { opacity: 1; }

/* ── Page header ───────────────────────────────────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--color-lavender-lt) 0%, var(--color-beige) 100%);
  border-bottom: 1px solid var(--border-color);
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1rem, 4vw, 2.5rem);
}
.page-hero-inner {
  max-width: 1440px;
  margin: 0 auto;
}
.page-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-mauve);
  margin-bottom: var(--space-sm);
}
.page-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--color-indigo);
  margin: 0 0 var(--space-sm);
  letter-spacing: -0.02em;
}
.page-hero .page-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0;
  max-width: 780px;
}

/* ── Sidebar ───────────────────────────────────────────────────────────── */
.content-sidebar { position: sticky; top: calc(var(--header-height) + 1.5rem); }

.toc-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}
.toc-box h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 0 var(--space-md);
}
.toc-box ol,
.toc-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.toc-box a {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  padding: 0.25rem 0;
  border-left: 2px solid transparent;
  padding-left: 0.625rem;
  transition: color var(--transition), border-color var(--transition);
  line-height: 1.4;
}
.toc-box a:hover {
  color: var(--color-indigo);
  border-color: var(--color-lavender-md);
}

/* ── Related pages ─────────────────────────────────────────────────────── */
.related-pages {
  margin-top: var(--space-2xl);
  border-top: 2px solid var(--border-color);
  padding-top: var(--space-xl);
}
.related-pages h2 {
  font-size: 1.15rem !important;
  border-bottom: none !important;
  margin-top: 0 !important;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}
.related-card {
  background: var(--bg-accent);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-indigo);
  transition: background var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.related-card:hover {
  background: var(--color-lavender-lt);
  transform: translateY(-1px);
}
.related-card svg { width: 14px; height: 14px; flex-shrink: 0; color: var(--color-mauve); }