/* ═══════════════════════════════════════════════════════
   Ocean Breeze Design System — full-stack-app.com
   ═══════════════════════════════════════════════════════ */

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --navy:          #0a1628;
  --navy-mid:      #112240;
  --navy-light:    #1a3356;
  --turquoise:     #00b4d8;
  --turquoise-dark:#0096c7;
  --aqua-mid:      #48cae4;
  --aqua-light:    #e0f7fa;
  --aqua-xlight:   #f0fbff;
  --white:         #ffffff;
  --surface:       #f8feff;
  --text-primary:  #0a1628;
  --text-secondary:#2c4a6e;
  --text-muted:    #5a7a9a;
  --border:        #cce7f0;
  --shadow-sm:     0 1px 3px rgba(10,22,40,.08);
  --shadow-md:     0 4px 16px rgba(10,22,40,.12);
  --shadow-lg:     0 8px 32px rgba(10,22,40,.18);
  --radius-sm:     6px;
  --radius-md:     10px;
  --radius-lg:     16px;
  --header-height: 64px;
  --font-sans:     'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --transition:    0.2s ease;
}

/* ── Reset & Base ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--surface);
  line-height: 1.7;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

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

/* ── Layout container ─────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

main { flex: 1; }

/* ── Anchor offset for sticky header ────────────────────── */
h1[id], h2[id], h3[id], h4[id], h5[id], h6[id] {
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

/* ══════════════════════════════════════════════════════════
   HEADER
   ══════════════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--navy);
  box-shadow: 0 2px 12px rgba(0,180,216,.15);
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: .75rem;
  text-decoration: none;
  color: var(--white);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -.01em;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.site-logo:hover { opacity: .85; }
.site-logo img { width: 36px; height: 36px; border-radius: 50%; }
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-text span:first-child { color: var(--turquoise); font-size: .85rem; }
.logo-text span:last-child  { color: var(--white); font-size: .8rem; font-weight: 400; opacity: .75; }

/* Nav */
.site-nav { display: flex; align-items: center; gap: .25rem; }

.nav-link {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem .75rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: rgba(255,255,255,.75);
  font-size: .875rem;
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-link .nav-icon { font-size: 1rem; }
.nav-link:hover { color: var(--turquoise); background: rgba(255,255,255,.06); }
.nav-link.active { color: var(--turquoise); background: rgba(0,180,216,.12); }
.nav-link.active .nav-icon { filter: drop-shadow(0 0 4px var(--turquoise)); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--navy-mid);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    gap: .25rem;
    border-bottom: 2px solid var(--turquoise);
    box-shadow: var(--shadow-lg);
  }
  .site-nav.open { display: flex; }
  .nav-link { padding: .75rem 1rem; border-radius: var(--radius-md); }
}

/* ══════════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════════ */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,.65);
  padding: 3rem 0 1.5rem;
  margin-top: auto;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr repeat(3, auto);
  gap: 2rem;
  align-items: start;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

.footer-brand .site-logo { margin-bottom: .75rem; }
.footer-brand p { font-size: .85rem; max-width: 28ch; line-height: 1.6; }

.footer-col h4 {
  color: var(--turquoise);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: .75rem;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: .4rem; }
.footer-col a {
  color: rgba(255,255,255,.65);
  text-decoration: none;
  font-size: .875rem;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--aqua-mid); }

.footer-bottom {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,.1);
  text-align: center;
  font-size: .8rem;
  opacity: .5;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════════════════════════
   BREADCRUMBS
   ══════════════════════════════════════════════════════════ */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
  padding: .875rem 0 1.5rem;
  font-size: .825rem;
  color: var(--text-muted);
}
.breadcrumbs a {
  color: var(--turquoise-dark);
  text-decoration: none;
  transition: color var(--transition);
}
.breadcrumbs a:hover { color: var(--turquoise); text-decoration: underline; }
.breadcrumbs .sep { color: var(--border); font-size: .75rem; }
.breadcrumbs .current { color: var(--text-secondary); font-weight: 500; }

/* ══════════════════════════════════════════════════════════
   HOMEPAGE
   ══════════════════════════════════════════════════════════ */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 50%, #0d2540 100%);
  color: var(--white);
  padding: clamp(4rem, 10vw, 8rem) 0;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% 40%, rgba(0,180,216,.12) 0%, transparent 70%);
}
.hero-inner {
  position: relative;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(0,180,216,.15);
  border: 1px solid rgba(0,180,216,.3);
  color: var(--aqua-mid);
  padding: .3rem .85rem;
  border-radius: 99px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 1.5rem;
}
.hero h1 .accent {
  background: linear-gradient(90deg, var(--turquoise), var(--aqua-mid));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.75);
  max-width: 65ch;
  margin-bottom: 2.5rem;
  line-height: 1.65;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .8rem 1.6rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: .95rem;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--turquoise);
  color: var(--navy);
  box-shadow: 0 0 0 0 rgba(0,180,216,.4);
}
.btn-primary:hover {
  background: var(--aqua-mid);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0,180,216,.35);
}
.btn-secondary {
  background: rgba(255,255,255,.08);
  color: var(--white);
  border: 1px solid rgba(255,255,255,.2);
}
.btn-secondary:hover {
  background: rgba(255,255,255,.14);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn .btn-icon { font-size: 1.15rem; }

/* Intro section */
.intro-section {
  padding: clamp(3rem, 6vw, 5rem) 0;
  background: var(--white);
}
.intro-section .container { max-width: 1440px; }
.intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 28rem), 1fr));
  gap: 2rem;
}
.intro-text h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
}
.intro-text p { color: var(--text-secondary); margin-bottom: 1rem; font-size: 1.05rem; }

/* Pillar cards section */
.pillars-section {
  padding: clamp(3rem, 6vw, 5rem) 0;
  background: var(--aqua-xlight);
}
.pillars-section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: .5rem;
}
.section-sub { color: var(--text-muted); margin-bottom: 2.5rem; font-size: 1.05rem; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1.5rem;
}

.pillar-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--turquoise);
}
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}
.card-icon-1 { background: rgba(0,180,216,.1); }
.card-icon-2 { background: rgba(72,202,228,.1); }
.card-icon-3 { background: rgba(0,119,182,.1); }
.pillar-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--navy); }
.pillar-card p { font-size: .925rem; color: var(--text-secondary); line-height: 1.6; flex: 1; }
.card-arrow { color: var(--turquoise); font-weight: 700; font-size: .9rem; margin-top: auto; }

/* ══════════════════════════════════════════════════════════
   PILLAR PAGES
   ══════════════════════════════════════════════════════════ */
.pillar-page { padding: 2rem 0 4rem; }

.pillar-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
  color: var(--white);
  padding: clamp(2.5rem, 6vw, 5rem) 0;
  margin-bottom: 3rem;
}
.pillar-hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, var(--white) 60%, var(--aqua-mid));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.pillar-hero p { color: rgba(255,255,255,.75); max-width: 65ch; font-size: 1.05rem; }

/* Sub-article cards on pillar pages */
.sub-articles { margin: 2rem 0 3rem; }
.sub-articles h2 { font-size: 1.35rem; font-weight: 700; color: var(--navy); margin-bottom: 1.25rem; }

.article-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: inherit;
  margin-bottom: .75rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.article-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--turquoise);
}
.article-card-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: .1rem; }
.article-card h3 { font-size: 1rem; font-weight: 600; color: var(--navy); margin-bottom: .25rem; }
.article-card p  { font-size: .875rem; color: var(--text-muted); line-height: 1.5; }

/* ══════════════════════════════════════════════════════════
   ARTICLE / CONTENT PAGES
   ══════════════════════════════════════════════════════════ */
.article-page { padding: 1.5rem 0 5rem; }

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

/* Wide content area */
.article-content {
  min-width: 0;
}

/* Prose styles */
.article-content h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, var(--navy) 0%, var(--turquoise-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.article-content h2 {
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--navy);
  margin: 2.5rem 0 .75rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--aqua-light);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.article-content h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: linear-gradient(to bottom, var(--turquoise), var(--aqua-mid));
  border-radius: 2px;
  flex-shrink: 0;
}

.article-content h3 {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 700;
  color: var(--navy-mid);
  margin: 2rem 0 .6rem;
}
.article-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 1.5rem 0 .5rem;
}

.article-content p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: 1.025rem;
  line-height: 1.75;
}

.article-content a {
  color: var(--turquoise-dark);
  text-decoration: underline;
  text-decoration-color: rgba(0,150,199,.3);
  text-underline-offset: 3px;
  transition: color var(--transition), text-decoration-color var(--transition);
}
.article-content a:hover {
  color: var(--turquoise);
  text-decoration-color: var(--turquoise);
}

.article-content ul, .article-content ol {
  margin: .75rem 0 1.25rem 1.5rem;
  color: var(--text-secondary);
}
.article-content li { margin-bottom: .4rem; font-size: 1.025rem; line-height: 1.7; }

/* Inline code */
.article-content :not(pre) > code {
  font-family: var(--font-mono);
  font-size: .875em;
  background: var(--aqua-light);
  color: var(--navy-mid);
  padding: .15em .45em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* Blockquote */
.article-content blockquote {
  border-left: 4px solid var(--turquoise);
  background: var(--aqua-xlight);
  padding: 1rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* Strong / emphasis */
.article-content strong { color: var(--navy); font-weight: 700; }

/* ── Code blocks ─────────────────────────────────────────── */
.code-block-wrapper {
  position: relative;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.code-block-wrapper::before {
  content: attr(data-lang);
  display: block;
  background: var(--navy-mid);
  color: var(--aqua-mid);
  font-family: var(--font-mono);
  font-size: .7rem;
  padding: .4rem 1rem;
  text-transform: uppercase;
  letter-spacing: .1em;
}

.code-block-wrapper pre {
  margin: 0 !important;
  border-radius: 0 0 var(--radius-md) var(--radius-md) !important;
  overflow-x: auto;
}

.copy-btn {
  position: absolute;
  top: .2rem;
  right: .5rem;
  background: rgba(255,255,255,.1);
  color: rgba(255,255,255,.8);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-sm);
  padding: .2rem .6rem;
  font-size: .7rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  z-index: 2;
}
.copy-btn:hover { background: rgba(0,180,216,.25); color: var(--turquoise); }
.copy-btn.copied { background: rgba(0,180,216,.2); color: var(--turquoise); }

/* ── Mermaid diagrams ─────────────────────────────────────── */
.mermaid-wrapper {
  margin: 1.5rem 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
  text-align: center;
  overflow-x: auto;
}
.mermaid-wrapper pre.mermaid { background: transparent; font-size: .9rem; }

/* ── Tables ──────────────────────────────────────────────── */
.table-scroll {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.table-scroll table {
  width: 100%;
  border-collapse: collapse;
  min-width: 500px;
  font-size: .9rem;
}
.table-scroll th {
  background: var(--navy);
  color: var(--white);
  padding: .75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: .85rem;
  white-space: nowrap;
}
.table-scroll td {
  padding: .7rem 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
}
.table-scroll tr:nth-child(even) td { background: var(--aqua-xlight); }
.table-scroll tr:hover td { background: rgba(0,180,216,.06); }

/* ── FAQ Accordions ──────────────────────────────────────── */
.faq-list { margin: 1.25rem 0; display: flex; flex-direction: column; gap: .6rem; }

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item[open] { box-shadow: var(--shadow-md); border-color: var(--turquoise); }

.faq-question {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: background var(--transition), color var(--transition);
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '›';
  font-size: 1.4rem;
  color: var(--turquoise);
  transition: transform var(--transition);
  transform: rotate(90deg);
  flex-shrink: 0;
}
.faq-item[open] .faq-question::after { transform: rotate(270deg); }
.faq-question:hover { background: var(--aqua-xlight); color: var(--turquoise-dark); }

.faq-answer {
  padding: 0 1.25rem 1rem;
  color: var(--text-secondary);
  font-size: .975rem;
  line-height: 1.7;
  border-top: 1px solid var(--border);
}
.faq-answer p { margin: .75rem 0 0; }

/* ── Checkboxes ──────────────────────────────────────────── */
.task-list { list-style: none; margin-left: 0; padding-left: 0; }
.task-list-item {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  padding: .3rem 0;
}
.task-list-item input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--turquoise);
  flex-shrink: 0;
  margin-top: .25rem;
  cursor: pointer;
}
.task-list-item.checked > span,
.task-list-item input[type="checkbox"]:checked ~ * {
  text-decoration: line-through;
  color: var(--text-muted);
}

/* ── Related nav ─────────────────────────────────────────── */
.related-nav {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--aqua-light);
}
.related-nav h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 1rem;
}
.related-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
  gap: .75rem;
}
.related-link {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: .875rem 1.1rem;
  text-decoration: none;
  color: var(--navy);
  font-size: .9rem;
  font-weight: 500;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.related-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--turquoise);
  color: var(--turquoise-dark);
}
.related-link .rl-arrow { color: var(--turquoise); margin-left: auto; flex-shrink: 0; }

/* ── Back to parent ──────────────────────────────────────── */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--turquoise-dark);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  margin-bottom: 2rem;
  transition: color var(--transition);
}
.back-link:hover { color: var(--turquoise); }

/* ══════════════════════════════════════════════════════════
   SYNTAX HIGHLIGHTING (Prism — Ocean Breeze Light)
   ══════════════════════════════════════════════════════════ */
code[class*="language-"], pre[class*="language-"] {
  font-family: var(--font-mono);
  font-size: .875rem;
  line-height: 1.6;
  color: var(--navy);
  background: #f0fbff;
  tab-size: 2;
}
pre[class*="language-"] {
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  background: #f0fbff;
}
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #607d8b; font-style: italic; }
.token.keyword, .token.selector, .token.important { color: #0096c7; font-weight: 600; }
.token.property, .token.tag, .token.builtin { color: #00838f; }
.token.string, .token.char, .token.attr-value { color: #2e7d32; }
.token.number, .token.boolean, .token.constant { color: #c62828; }
.token.function { color: #6200ea; }
.token.operator { color: #0096c7; }
.token.punctuation { color: #546e7a; }
.token.attr-name, .token.variable { color: #0077b6; }
.token.class-name { color: #00695c; font-weight: 600; }
.token.regex, .token.url { color: #0096c7; }
.token.deleted { background: #ffebee; }
.token.inserted { background: #e8f5e9; }

/* ══════════════════════════════════════════════════════════
   UTILITIES
   ══════════════════════════════════════════════════════════ */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .hero-ctas { flex-direction: column; align-items: flex-start; }
  .btn { width: 100%; justify-content: center; }
  .article-content h2::before { display: none; }
  .pillar-hero h1 { -webkit-text-fill-color: var(--white); }
}

/* Print */
@media print {
  .site-header, .site-footer, .copy-btn, .nav-toggle { display: none; }
  body { background: white; color: black; }
}