/* lyt base stylesheet */
/* Minimal, un-opinionated, depth-present, beige */
/* Mobile-first, 3-plane z-index metaphor */

/* ─── Reset ─────────────────────────────────────────── */
*, *::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-body, system-ui, sans-serif);
  font-size: var(--text-base, 1rem);
  line-height: var(--leading-normal, 1.5);
  color: var(--color-text, #3d3d3d);
  background-color: var(--color-bg, #f5f5f0);
  /* Universal depth gradient - warm glow works in both light and dark */
  background-image: 
    radial-gradient(ellipse 60% 30% at 50% -10%, rgba(220, 180, 120, 0.06) 0%, transparent 60%),
    linear-gradient(180deg, var(--color-bg, #f5f5f0) 0%, var(--color-bg, #f5f5f0) 100%);
  background-attachment: fixed;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* Accent color: warm amber - visible in both light and dark mode */
:root {
  --color-accent-1: #f5e6c8;
  --color-accent-2: #d4b896;
  --color-accent-3: #c4a77d;
  --color-accent-4: #a08050;
  --color-accent-5: #6b552f;
}

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

a {
  color: var(--color-link, #5c5c4a);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-link-hover, #3d3d3d);
}

/* ─── Layout ───────────────────────────────────────── */
.main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width, 720px);
  margin-inline: auto;
  padding: var(--space-4, 1rem);
  padding-bottom: var(--space-16, 4rem);
}

/* ─── Nav ───────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav, 6);
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border, #d8d8d0);
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
}

.nav-inner {
  max-width: var(--max-width, 720px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4, 1rem);
}

.nav-brand {
  font-family: var(--font-brand, serif);
  font-size: var(--text-lg, 1.125rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text) !important;
  text-decoration: none;
}

.nav-github {
  margin-left: auto;
  color: var(--color-text) !important;
  text-decoration: none;
  display: flex;
  align-items: center;
  transition: opacity 0.2s ease;
}

.nav-github:hover {
  opacity: 0.7;
}

/* Mobile nav */
@media (max-width: 640px) {
  .nav-github {
    display: none;
  }
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-4, 1rem);
  flex-wrap: wrap;
}

.nav-link {
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-muted, #7a7a6e) !important;
  text-decoration: none;
  transition: color 0.15s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--color-text) !important;
}

.nav-link.active,
.nav-link[aria-current="page"] {
  color: var(--color-accent-4, #a08050) !important;
}

/* Active indicator: small dot below the link */
.nav-link.active::after,
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent-3, #c4a77d);
}

/* Mobile menu toggle button (hidden on desktop) */
.nav-toggle {
  display: none;
  position: relative;
  z-index: calc(var(--z-nav, 6) + 1);
  width: 32px;
  height: 32px;
  padding: 4px;
  background: none;
  border: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text, #3d3d3d);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle span {
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav-toggle span::before {
  top: -7px;
}

.nav-toggle span::after {
  top: 7px;
}

/* Mobile menu - checkbox hack for JS-free toggle */
.nav-menu-checkbox {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* Mobile menu container */
.nav-menu {
  display: none;
}

/* ─── Footer ────────────────────────────────────────── */
.footer {
  padding: var(--space-8, 2rem) var(--space-4, 1rem);
  text-align: center;
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-muted, #7a7a6e);
  border-top: 1px solid var(--color-border, #d8d8d0);
}

/* Agent link - subtle but discoverable */
.agent-notice {
  margin-top: var(--space-3, 0.75rem);
}

.footer-copyright,
.footer-license {
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-muted, #7a7a6e);
  margin: var(--space-1, 0.25rem) 0;
}

.agent-link {
  color: var(--color-muted, #7a7a6e);
  font-size: var(--text-xs, 0.75rem);
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.15s ease;
}

.agent-link:hover {
  opacity: 1;
  text-decoration: underline;
}

/* ─── Sections ──────────────────────────────────────── */
.section {
  padding: var(--space-8, 2rem) 0;
}

.section-title {
  font-family: var(--font-heading, serif);
  font-size: var(--text-2xl, 1.625rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-heading, #2a2a25);
  margin-bottom: var(--space-3, 0.75rem);
  line-height: 1.15;
}

.section-content {
  font-size: var(--text-base, 1.0625rem);
  line-height: 1.55;
  color: var(--color-text, #3d3d3d);
}

/* ─── Section Break ──────────────────────────────────── */
.section-break {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8, 2rem) 0;
  margin: var(--space-8, 2rem) 0;
}

.section-break::before,
.section-break::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--color-border, #d8d8d0);
}

.section-break-icon {
  padding: 0 var(--space-4, 1rem);
  color: var(--color-muted, #7a7a6e);
  font-size: var(--text-lg, 1.125rem);
}

.section-content p {
  margin-bottom: var(--space-4, 1rem);
}

.section-content h2 {
  font-family: var(--font-heading, serif);
  font-size: var(--text-xl, 1.375rem);
  font-weight: 700;
  margin-top: var(--space-8, 2rem);
  margin-bottom: var(--space-3, 0.75rem);
  letter-spacing: -0.01em;
  color: var(--color-heading, #2a2a25);
}

.section-content h3 {
  font-family: var(--font-heading, serif);
  font-size: var(--text-lg, 1.1875rem);
  font-weight: 600;
  margin-top: var(--space-6, 1.5rem);
  margin-bottom: var(--space-2, 0.5rem);
  letter-spacing: -0.01em;
  color: var(--color-heading, #2a2a25);
}

.section-content ul, .section-content ol {
  margin-bottom: var(--space-4, 1rem);
  padding-left: var(--space-6, 1.5rem);
}

.section-content li {
  margin-bottom: var(--space-2, 0.5rem);
}

/* ─── Tables ────────────────────────────────────────── */
.section-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4, 1rem) 0;
  font-size: var(--text-sm, 0.875rem);
}

.section-content th,
.section-content td {
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  text-align: left;
  border-bottom: 1px solid var(--color-border, #d8d8d0);
}

.section-content th {
  font-family: var(--font-mono, monospace);
  font-weight: 600;
  background: var(--color-surface, #ecece6);
  color: var(--color-heading, #2a2a25);
}

.section-content td {
  background: var(--color-bg, #f5f5f0);
}

.section-content tr:last-child td {
  border-bottom: none;
}

.section-content code {
  font-family: var(--font-mono, monospace);
  font-size: 0.875em;
  background: var(--color-surface, #ecece6);
  padding: 0.125em 0.375em;
  border-radius: 3px;
}

.section-content pre {
  background: var(--color-surface, #ecece6);
  padding: var(--space-4, 1rem);
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: var(--space-4, 1rem);
}

.section-content pre code {
  background: none;
  padding: 0;
}

.section-content blockquote {
  border-left: 3px solid var(--color-border, #d8d8d0);
  padding-left: var(--space-4, 1rem);
  color: var(--color-muted, #7a7a6e);
  font-style: italic;
  margin-bottom: var(--space-4, 1rem);
}

/* ─── Cards ─────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4, 1rem);
  margin-top: var(--space-6, 1.5rem);
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  position: relative;
  z-index: var(--z-content, 1);
  background: var(--color-surface, #ecece6);
  border: 1px solid var(--color-border, #d8d8d0);
  padding: var(--space-5, 1.25rem);
  border-radius: 4px;
  box-shadow:
    2px 2px 0 0 var(--color-border, #d8d8d0),
    4px 4px 0 0 color-mix(in srgb, var(--color-border) 30%, transparent);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translate(-1px, -1px);
  box-shadow:
    3px 3px 0 0 var(--color-border, #d8d8d0),
    6px 6px 0 0 color-mix(in srgb, var(--color-border) 30%, transparent);
}

.card-title {
  font-family: var(--font-heading, monospace);
  font-size: var(--text-base, 1rem);
  font-weight: 700;
  margin-bottom: var(--space-2, 0.5rem);
  color: var(--color-heading, #2a2a25);
}

.card-body {
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-text, #3d3d3d);
  line-height: 1.5;
}

/* ─── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-block;
  position: relative;
  z-index: var(--z-floating, 3);
  padding: var(--space-2, 0.5rem) var(--space-4, 1rem);
  font-family: var(--font-mono, monospace);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none !important;
  border: 2px solid var(--color-border, #3d3d3d);
  border-radius: 2px;
  background: var(--color-bg, #f5f5f0);
  color: var(--color-text, #3d3d3d);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.btn:hover {
  background: var(--color-text, #3d3d3d);
  color: var(--color-bg, #f5f5f0);
}

.btn:active {
  transform: translate(1px, 1px);
}

.btn-primary {
  background: var(--color-text, #3d3d3d);
  color: var(--color-bg, #f5f5f0);
}

.btn-primary:hover {
  background: var(--color-heading, #2a2a25);
  color: var(--color-bg, #f5f5f0);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-text, #3d3d3d);
}

.btn-outline:hover {
  background: var(--color-text, #3d3d3d);
  color: var(--color-bg, #f5f5f0);
}

/* ─── CTA Group ─────────────────────────────────────── */
.cta-group {
  display: flex;
  gap: var(--space-3, 0.75rem);
  flex-wrap: wrap;
  margin-top: var(--space-6, 1.5rem);
}

/* ─── Blog Post ─────────────────────────────────────── */
.blog-post {
  padding: var(--space-8, 2rem) 0;
}

.post-title {
  font-family: var(--font-heading, monospace);
  font-size: clamp(var(--text-2xl, 1.5rem), 5vw, var(--text-4xl, 2.25rem));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-heading, #2a2a25);
  margin-bottom: var(--space-4, 1rem);
}

.post-meta {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-muted, #7a7a6e);
  margin-bottom: var(--space-6, 1.5rem);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.post-description {
  font-size: var(--text-lg, 1.125rem);
  color: var(--color-text, #3d3d3d);
  line-height: var(--leading-relaxed, 1.625);
  margin-bottom: var(--space-8, 2rem);
  padding-bottom: var(--space-6, 1.5rem);
  border-bottom: 1px solid var(--color-border, #d8d8d0);
}

.post-body {
  font-size: var(--text-base, 1rem);
  line-height: var(--leading-relaxed, 1.625);
}

.post-body p {
  margin-bottom: var(--space-4, 1rem);
}

.post-body h2 {
  font-family: var(--font-heading, monospace);
  font-size: var(--text-xl, 1.25rem);
  font-weight: 700;
  margin-top: var(--space-8, 2rem);
  margin-bottom: var(--space-3, 0.75rem);
}

.post-body h3 {
  font-family: var(--font-heading, monospace);
  font-size: var(--text-lg, 1.125rem);
  font-weight: 600;
  margin-top: var(--space-6, 1.5rem);
  margin-bottom: var(--space-2, 0.5rem);
}

.post-body ul, .post-body ol {
  margin-bottom: var(--space-4, 1rem);
  padding-left: var(--space-6, 1.5rem);
}

.post-body li {
  margin-bottom: var(--space-2, 0.5rem);
}

.post-body a {
  color: var(--color-link, #5c5c4a);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.post-body blockquote {
  border-left: 3px solid var(--color-border, #d8d8d0);
  padding-left: var(--space-4, 1rem);
  color: var(--color-muted, #7a7a6e);
  font-style: italic;
  margin-bottom: var(--space-4, 1rem);
}

.post-body code {
  font-family: var(--font-mono, monospace);
  font-size: 0.875em;
  background: var(--color-surface, #ecece6);
  padding: 0.125em 0.375em;
  border-radius: 3px;
}

.post-body pre {
  background: var(--color-surface, #ecece6);
  padding: var(--space-4, 1rem);
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: var(--space-4, 1rem);
}

.post-body pre code {
  background: none;
  padding: 0;
}

.post-body img {
  border-radius: 4px;
  margin: var(--space-6, 1.5rem) 0;
}

/* ─── Hero ──────────────────────────────────────────── */
.hero {
  padding: var(--space-16, 4rem) 0 var(--space-12, 3rem);
}

.hero-title {
  font-family: var(--font-heading, serif);
  font-size: clamp(var(--text-3xl, 2rem), 8vw, var(--text-6xl, 3.75rem));
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--color-heading, #2a2a25);
  margin-bottom: var(--space-3, 0.75rem);
}

.hero-subtitle {
  font-family: var(--font-body, sans-serif);
  font-size: var(--text-base, 1.0625rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-muted, #7a7a6e);
  margin-bottom: var(--space-5, 1.25rem);
}

.hero-body {
  font-size: var(--text-lg, 1.1875rem);
  line-height: 1.55;
  color: var(--color-text, #3d3d3d);
  max-width: 55ch;
  margin-bottom: var(--space-5, 1.25rem);
}

.hero-buttons {
  display: flex;
  gap: var(--space-3, 0.75rem);
  flex-wrap: wrap;
  margin-top: var(--space-6, 1.5rem);
}

/* ─── Features Grid ───────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4, 1rem);
  margin-top: var(--space-6, 1.5rem);
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  position: relative;
  z-index: var(--z-content, 1);
  background: var(--color-surface, #ecece6);
  border: 1px solid var(--color-border, #d8d8d0);
  padding: var(--space-5, 1.25rem);
  border-radius: 4px;
  box-shadow:
    2px 2px 0 0 var(--color-border, #d8d8d0),
    4px 4px 0 0 color-mix(in srgb, var(--color-border) 30%, transparent);
}

.feature-icon {
  font-size: var(--text-2xl, 1.5rem);
  margin-bottom: var(--space-3, 0.75rem);
}

.feature-title {
  font-family: var(--font-heading, monospace);
  font-size: var(--text-base, 1rem);
  font-weight: 700;
  margin-bottom: var(--space-2, 0.5rem);
  color: var(--color-heading, #2a2a25);
}

.feature-body {
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-text, #3d3d3d);
  line-height: 1.5;
}

/* ─── Callout ────────────────────────────────────────── */
.callout {
  position: relative;
  z-index: var(--z-content, 1);
  padding: var(--space-4, 1rem);
  margin: var(--space-6, 1.5rem) 0;
  border-radius: 4px;
  border-left: 4px solid var(--color-muted, #7a7a6e);
  background: var(--color-surface, #ecece6);
}

.callout-info {
  border-color: var(--color-muted, #7a7a6e);
}

.callout-tip {
  border-color: var(--color-accent-cool, #8090a0);
  background: color-mix(in srgb, var(--color-accent-cool, #8090a0) 10%, var(--color-surface, #ecece6));
}

.callout-note {
  border-color: var(--color-accent-warm, #a89880);
  background: color-mix(in srgb, var(--color-accent-warm, #a89880) 10%, var(--color-surface, #ecece6));
}

.callout-title {
  display: block;
  font-family: var(--font-heading, monospace);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 700;
  margin-bottom: var(--space-2, 0.5rem);
  color: var(--color-heading, #2a2a25);
}

.callout-body {
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-text, #3d3d3d);
  line-height: 1.5;
}

.callout-body p:last-child {
  margin-bottom: 0;
}

/* ─── Pull Quote ──────────────────────────────────────── */
.pull-quote {
  position: relative;
  z-index: var(--z-content, 1);
  margin: var(--space-8, 2rem) 0;
  padding: var(--space-6, 1.5rem);
  padding-left: var(--space-8, 2rem);
  border-left: 4px solid var(--color-accent-warm, #a89880);
  background: var(--color-surface, #ecece6);
  border-radius: 0 4px 4px 0;
}

.pull-quote p {
  font-family: var(--font-body, system-ui, sans-serif);
  font-size: var(--text-xl, 1.25rem);
  font-style: italic;
  line-height: var(--leading-relaxed, 1.625);
  color: var(--color-heading, #2a2a25);
  margin-bottom: var(--space-4, 1rem);
}

.pull-quote-attribution {
  display: block;
  font-family: var(--font-mono, monospace);
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-muted, #7a7a6e);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pull-quote-attribution cite {
  font-style: normal;
  font-weight: 600;
}

/* ─── Citation ───────────────────────────────────────── */
.citation {
  display: block;
  position: relative;
  z-index: var(--z-content, 1);
  margin: var(--space-6, 1.5rem) 0;
  padding: var(--space-4, 1rem);
  background: var(--color-surface, #ecece6);
  border-left: 3px solid var(--color-border, #d8d8d0);
  border-radius: 0 4px 4px 0;
  font-style: normal;
}

.citation-link {
  font-weight: 600;
  color: var(--color-link, #5c5c4a);
  text-decoration: none;
}

.citation-link:hover {
  color: var(--color-link-hover, #3d3d3d);
  text-decoration: underline;
}

.citation-details {
  display: block;
  margin-top: var(--space-2, 0.5rem);
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-muted, #7a7a6e);
}

/* ─── CTA Section ────────────────────────────────────── */
.section-cta {
  position: relative;
  z-index: var(--z-floating, 3);
  text-align: center;
  padding: var(--space-12, 3rem) var(--space-6, 1.5rem);
  margin: var(--space-8, 2rem) 0;
  background: var(--color-surface, #ecece6);
  border: 1px solid var(--color-border, #d8d8d0);
  border-radius: 8px;
  box-shadow:
    4px 4px 0 0 var(--color-border, #d8d8d0),
    8px 8px 0 0 color-mix(in srgb, var(--color-border) 20%, transparent);
}

.cta-title {
  font-family: var(--font-heading, monospace);
  font-size: var(--text-2xl, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-heading, #2a2a25);
  margin-bottom: var(--space-4, 1rem);
}

.cta-body {
  font-size: var(--text-base, 1rem);
  color: var(--color-text, #3d3d3d);
  max-width: 45ch;
  margin: 0 auto var(--space-6, 1.5rem);
  line-height: var(--leading-relaxed, 1.625);
}

/* ─── Warning Box ────────────────────────────────────── */
.warning-box {
  position: relative;
  z-index: var(--z-content, 1);
  padding: var(--space-4, 1rem);
  margin: var(--space-6, 1.5rem) 0;
  border-radius: 4px;
  border-left: 4px solid var(--color-system-warning, #8b6a30);
  background: color-mix(in srgb, var(--color-system-warning, #8b6a30) 10%, var(--color-bg, #f5f5f0));
}

.warning-warning {
  border-color: var(--color-system-warning, #8b6a30);
  background: color-mix(in srgb, var(--color-system-warning, #8b6a30) 10%, var(--color-bg, #f5f5f0));
  box-shadow:
    2px 2px 0 0 var(--color-system-warning, #8b6a30),
    4px 4px 0 0 color-mix(in srgb, var(--color-system-warning, #8b6a30) 30%, transparent);
}

.warning-error {
  border-color: var(--color-system-error, #8b3a3a);
  background: color-mix(in srgb, var(--color-system-error, #8b3a3a) 10%, var(--color-bg, #f5f5f0));
  box-shadow:
    2px 2px 0 0 var(--color-system-error, #8b3a3a),
    4px 4px 0 0 color-mix(in srgb, var(--color-system-error, #8b3a3a) 30%, transparent);
}

.warning-info {
  border-color: var(--color-accent-cool, #8090a0);
  background: color-mix(in srgb, var(--color-accent-cool, #8090a0) 10%, var(--color-bg, #f5f5f0));
  box-shadow:
    2px 2px 0 0 var(--color-accent-cool, #8090a0),
    4px 4px 0 0 color-mix(in srgb, var(--color-accent-cool, #8090a0) 30%, transparent);
}

.warning-success {
  border-color: var(--color-system-success, #3a6b3a);
  background: color-mix(in srgb, var(--color-system-success, #3a6b3a) 10%, var(--color-bg, #f5f5f0));
  box-shadow:
    2px 2px 0 0 var(--color-system-success, #3a6b3a),
    4px 4px 0 0 color-mix(in srgb, var(--color-system-success, #3a6b3a) 30%, transparent);
}

.warning-title {
  display: block;
  font-family: var(--font-heading, monospace);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2, 0.5rem);
  color: var(--color-heading, #2a2a25);
}

.warning-body {
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-text, #3d3d3d);
  line-height: 1.5;
}

.warning-body p:last-child {
  margin-bottom: 0;
}

/* ─── Code Example ─────────────────────────────────────── */
.code-example {
  position: relative;
  z-index: var(--z-content, 1);
  margin: var(--space-6, 1.5rem) 0;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--color-border, #d8d8d0);
  background: var(--color-surface, #ecece6);
}

.code-example-header {
  display: flex;
  align-items: center;
  gap: var(--space-3, 0.75rem);
  padding: var(--space-2, 0.5rem) var(--space-4, 1rem);
  background: var(--color-border, #d8d8d0);
  border-bottom: 1px solid var(--color-border, #d8d8d0);
}

.code-example-title {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-xs, 0.75rem);
  color: var(--color-text, #3d3d3d);
}

.code-example-lang {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-xs, 0.75rem);
  font-weight: 600;
  color: var(--color-muted, #7a7a6e);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-block {
  margin: 0;
  padding: var(--space-4, 1rem);
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono, monospace);
  font-size: var(--text-sm, 0.875rem);
  line-height: 1.6;
  color: var(--color-text, #3d3d3d);
  background: none;
  padding: 0;
}

/* ─── Utility ───────────────────────────────────────── */
.error {
  color: var(--color-error, #8b3a3a);
  padding: var(--space-4, 1rem);
  background: color-mix(in srgb, var(--color-error) 10%, transparent);
  border: 1px solid var(--color-error, #8b3a3a);
  border-radius: 2px;
}

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 639px) {
  /* Show hamburger menu on mobile */
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Mobile menu - hidden by default */
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg, #f5f5f0);
    border-bottom: 1px solid var(--color-border, #d8d8d0);
    padding: var(--space-4, 1rem);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  /* When checkbox is checked, show menu */
  .nav-menu-checkbox:checked ~ .nav-menu {
    display: block;
    animation: slideDown 0.2s ease;
  }

  /* Animate hamburger to X */
  .nav-menu-checkbox:checked ~ .nav-toggle span {
    background: transparent;
  }

  .nav-menu-checkbox:checked ~ .nav-toggle span::before {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-menu-checkbox:checked ~ .nav-toggle span::after {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Hide desktop links on mobile */
  .nav-links {
    display: none;
  }

  /* Mobile links - shown in menu */
  .nav-mobile-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3, 0.75rem);
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .nav-mobile-link {
    display: block;
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    font-size: var(--text-base, 1rem);
    color: var(--color-text, #3d3d3d) !important;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.15s ease;
  }

  .nav-mobile-link:hover {
    background: var(--color-surface, #ecece6);
    color: var(--color-text, #3d3d3d) !important;
  }

  .nav-mobile-link.active,
  .nav-mobile-link[aria-current="page"] {
    background: var(--color-surface, #ecece6);
    font-weight: 600;
  }

  .hero-title {
    font-size: var(--text-4xl, 2.25rem);
  }

  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

@media (min-width: 640px) {
  .main {
    padding: var(--space-8, 2rem);
  }

  .hero {
    padding: var(--space-20, 5rem) 0 var(--space-16, 4rem);
  }
}

@media (min-width: 1024px) {
  .main {
    padding: var(--space-12, 3rem);
  }
}

/* ─── Dark Mode ─────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    /* Dark mode: Warm night sky with fireflies */
    --color-bg: #111215;
    --color-surface: #16181f;
    --color-surface-elevated: #1e2028;
    --color-border: #2a2e38;

    /* Universal gradient works in both modes */
    
    --color-text: #e4dfd4;
    --color-text-secondary: #9a9488;
    --color-muted: #5e5b54;
    --color-heading: #ece6d8;
    
    --color-link: #d4b896;
    --color-link-hover: #f0dec2;
    
    /* Accent: warm amber - firefly glow */
    --color-accent-1: #2d2418;
    --color-accent-2: #453828;
    --color-accent-3: #6b5230;
    --color-accent-4: #a08050;
    --color-accent-5: #e4c896;
    
    --color-system-warning: #d4b896;
    --color-system-error: #d98a8a;
    --color-system-success: #8ab87a;
    
    --color-error: #d98a8a;
  }
  
  /* Adjustments for dark mode */
  .nav {
    background: color-mix(in srgb, var(--color-bg) 90%, transparent);
  }
  
  .nav-toggle span,
  .nav-toggle span::before,
  .nav-toggle span::after {
    background: var(--color-text, #e8e4dc);
  }
  
  .card,
  .feature-card,
  .callout,
  .pull-quote,
  .citation,
  .section-cta,
  .code-example {
    border-color: var(--color-border, #262e3a);
    box-shadow:
      2px 2px 0 0 #1a1c22,
      4px 4px 12px 0 rgba(0, 0, 0, 0.4);
  }
  
  .card:hover {
    box-shadow:
      3px 3px 0 0 #1a1c22,
      6px 6px 16px 0 rgba(0, 0, 0, 0.35);
  }
  
  .code-example-header {
    background: var(--color-border, #262e3a);
  }
  
  .section-cta {
    box-shadow:
      4px 4px 0 0 #1a1c22,
      8px 8px 20px 0 rgba(0, 0, 0, 0.35);
  }
  
  .nav-mobile-link:hover,
  .nav-mobile-link.active {
    background: var(--color-surface, #131920);
  }
  
  /* Warning box dark mode - consistent stacked shadows */
  .warning-warning {
    background: color-mix(in srgb, var(--color-system-warning) 12%, var(--color-bg));
    border-color: var(--color-system-warning);
    box-shadow:
      2px 2px 0 0 var(--color-system-warning),
      4px 4px 0 0 color-mix(in srgb, var(--color-system-warning) 30%, transparent);
  }
  
  .warning-error {
    background: color-mix(in srgb, var(--color-system-error) 12%, var(--color-bg));
    border-color: var(--color-system-error);
    box-shadow:
      2px 2px 0 0 var(--color-system-error),
      4px 4px 0 0 color-mix(in srgb, var(--color-system-error) 30%, transparent);
  }
  
  .warning-info {
    background: color-mix(in srgb, var(--color-accent-cool) 12%, var(--color-bg));
    border-color: var(--color-accent-cool);
    box-shadow:
      2px 2px 0 0 var(--color-accent-cool),
      4px 4px 0 0 color-mix(in srgb, var(--color-accent-cool) 30%, transparent);
  }
  
  .warning-success {
    background: color-mix(in srgb, var(--color-system-success) 12%, var(--color-bg));
    border-color: var(--color-system-success);
    box-shadow:
      2px 2px 0 0 var(--color-system-success),
      4px 4px 0 0 color-mix(in srgb, var(--color-system-success) 30%, transparent);
  }
}