/* ===== DESIGN TOKENS — neo-brutalist ===== */
:root {
  --bg-light: #fafaf9;
  --bg-dark: #0a0a0a;
  --text-light: #1a1a1a;
  --text-dark: #e5e5e5;
  --surface-light: #ffffff;
  --surface-dark: #141414;
  --border-light: #1a1a1a;
  --border-dark: #333333;
  --muted-light: #737373;
  --muted-dark: #a3a3a3;

  /* accent palette */
  --hot-pink: #ff00f5;
  --warm-coral: #ff5f5f;
  --electric-blue: #0052ff;
  --lime-green: #afff00;
  --vibrant-orange: #ff4911;
  --cyan-accent: #00c1d4;
  --yellow-accent: #ffef00;
  --purple-accent: #5b2eff;

  /* shadows */
  --shadow-sm: 3px 3px 0;
  --shadow-md: 5px 5px 0;
  --shadow-lg: 8px 8px 0;

  /* borders / radius */
  --border-w: 3px;
  --radius: 0px;
}

/* ===== BASE ===== */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -moz-tab-size: 4;
  tab-size: 4;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-light);
  background-color: var(--bg-light);
  transition: background-color 0.2s, color 0.2s;
}

body.dark {
  color: var(--text-dark);
  background-color: var(--bg-dark);
}

a { color: inherit; }

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

/* ===== LAYOUT ===== */
.container {
  width: min(1140px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0 1rem;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.03em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }
h4 { font-size: 1rem; }

p { margin: 0; }

/* ===== THEME SWITCHER ===== */
.theme-switcher {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  display: inline-flex;
  align-items: center;
}

.theme-switcher select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding: 0.5rem 2.1rem 0.5rem 0.9rem;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text-light);
  background: var(--surface-light);
  border: var(--border-w) solid var(--border-light);
  border-radius: 0;
  box-shadow: var(--shadow-sm) var(--border-light);
  cursor: pointer;
  outline: none;
  min-width: 160px;
  transition: transform 0.14s, box-shadow 0.14s;
}

.theme-switcher select:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-md) var(--border-light);
}

.theme-switcher select:focus-visible {
  box-shadow: var(--shadow-md) var(--electric-blue);
}

.theme-switcher-chevron {
  position: absolute;
  right: 0.8rem;
  pointer-events: none;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-light);
}

body.dark .theme-switcher select {
  color: var(--text-dark);
  background: var(--surface-dark);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-sm) var(--border-dark);
}

body.dark .theme-switcher select:hover {
  box-shadow: var(--shadow-md) var(--border-dark);
}

body.dark .theme-switcher-chevron {
  color: var(--text-dark);
}

.theme-switcher select option {
  font-family: inherit;
  background: var(--surface-light);
  color: var(--text-light);
}

body.dark .theme-switcher select option {
  background: var(--surface-dark);
  color: var(--text-dark);
}

/* ===== SITE NAV ===== */
.site-nav {
  padding: 1rem 0;
  margin-top: 0.5rem;
  border-bottom: var(--border-w) solid var(--border-light);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

body.dark .site-nav {
  border-color: var(--border-dark);
}

.site-nav-brand {
  font-weight: 700;
  font-size: 1rem;
  padding: 0.4rem 0.8rem;
  border: var(--border-w) solid var(--border-light);
  background: var(--hot-pink);
  color: #000;
  box-shadow: var(--shadow-sm) var(--border-light);
  text-decoration: none;
  margin-right: auto;
  letter-spacing: -0.02em;
}

body.dark .site-nav-brand {
  border-color: var(--border-dark);
  background: #b3004b;
  color: #fff;
  box-shadow: var(--shadow-sm) var(--border-dark);
}

.site-nav a:not(.site-nav-brand) {
  padding: 0.35rem 0.65rem;
  border: 2px solid transparent;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.12s;
}

.site-nav a:not(.site-nav-brand):hover {
  border-color: var(--border-light);
  background: var(--lime-green);
  color: #000;
}

body.dark .site-nav a:not(.site-nav-brand):hover {
  border-color: var(--border-dark);
  background: #3d6600;
  color: #fff;
}

/* ===== BREADCRUMBS ===== */
.breadcrumbs {
  padding: 0.85rem 0 0;
  font-size: 0.78rem;
}

.breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs li + li::before {
  content: "/";
  opacity: 0.45;
  padding: 0 0.35rem 0 0;
  font-weight: 700;
}

.breadcrumbs a {
  text-decoration: none;
  border: 2px solid var(--border-light);
  padding: 0.1rem 0.5rem;
  background: var(--surface-light);
  color: var(--text-light);
  font-weight: 700;
  transition: transform 0.12s, box-shadow 0.12s;
}

body.dark .breadcrumbs a {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  color: var(--text-dark);
}

.breadcrumbs a:hover {
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--border-light);
  background: var(--yellow-accent);
  color: #000;
}

body.dark .breadcrumbs a:hover {
  box-shadow: 2px 2px 0 var(--border-dark);
  background: #bba701;
  color: #fff;
}

.breadcrumbs [aria-current="page"] {
  padding: 0.1rem 0.5rem;
  border: 2px solid var(--border-light);
  background: var(--lime-green);
  color: #000;
  font-weight: 700;
}

body.dark .breadcrumbs [aria-current="page"] {
  border-color: var(--border-dark);
  background: #3d6600;
  color: #fff;
}

/* ===== HERO (landing) ===== */
.hero {
  padding: 2.5rem 0 2rem;
  display: grid;
  gap: 1.25rem;
}

.hero-eyebrow {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border: var(--border-w) solid var(--border-light);
  background: var(--lime-green);
  color: #000;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-sm) var(--border-light);
}

body.dark .hero-eyebrow {
  border-color: var(--border-dark);
  background: #3d6600;
  color: #fff;
  box-shadow: var(--shadow-sm) var(--border-dark);
}

.hero h1 {
  margin-top: 1rem;
  max-width: 18ch;
}

.hero-desc {
  max-width: 60ch;
  font-size: 1.05rem;
  color: var(--muted-light);
  margin-top: 0.25rem;
}

body.dark .hero-desc {
  color: var(--muted-dark);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.stat-card {
  padding: 1rem;
  border: var(--border-w) solid var(--border-light);
  background: var(--surface-light);
  box-shadow: var(--shadow-md) var(--border-light);
}

body.dark .stat-card {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  box-shadow: var(--shadow-md) var(--border-dark);
}

.stat-value {
  display: block;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--muted-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

body.dark .stat-label {
  color: var(--muted-dark);
}

/* ===== BUTTONS ===== */
.neo-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  border: var(--border-w) solid var(--border-light);
  background: var(--surface-light);
  color: var(--text-light);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--shadow-md) var(--border-light);
  transition: transform 0.14s, box-shadow 0.14s;
}

body.dark .neo-btn {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  color: var(--text-dark);
  box-shadow: var(--shadow-md) var(--border-dark);
}

.neo-btn:hover, .neo-btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg) var(--border-light);
}

body.dark .neo-btn:hover,
body.dark .neo-btn:focus-visible {
  box-shadow: var(--shadow-lg) var(--border-dark);
}

.neo-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border-light);
}

body.dark .neo-btn:active {
  box-shadow: 1px 1px 0 var(--border-dark);
}

.neo-btn-primary {
  background: var(--hot-pink);
  color: #000;
}

body.dark .neo-btn-primary {
  background: #b3004b;
  color: #fff;
}

.neo-btn-accent {
  background: var(--electric-blue);
  color: #fff;
}

body.dark .neo-btn-accent {
  background: #1e3a5c;
  color: #fff;
}

/* ===== SECTIONS ===== */
.section {
  padding: 1.75rem 0 2.5rem;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.section-eyebrow {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border: var(--border-w) solid var(--border-light);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

body.dark .section-eyebrow {
  border-color: var(--border-dark);
}

.eyebrow-flags    { background: var(--electric-blue); color: #fff; }
.eyebrow-features { background: var(--cyan-accent); color: #000; }
.eyebrow-install  { background: var(--lime-green); color: #000; }
.eyebrow-render   { background: var(--purple-accent); color: #fff; }

body.dark .eyebrow-flags    { background: #1e3a5c; color: #fff; }
body.dark .eyebrow-features { background: #007a8a; color: #fff; }
body.dark .eyebrow-install  { background: #3d6600; color: #fff; }
body.dark .eyebrow-render   { background: #341797; color: #fff; }

/* ===== DIVIDER ===== */
.divider {
  border: none;
  border-top: var(--border-w) solid var(--border-light);
  margin: 0;
}

body.dark .divider {
  border-color: var(--border-dark);
}

/* ===== FEATURE CARDS ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  border: var(--border-w) solid var(--border-light);
  background: var(--surface-light);
  box-shadow: var(--shadow-md) var(--border-light);
  transition: transform 0.14s, box-shadow 0.14s;
}

body.dark .feature-card {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  box-shadow: var(--shadow-md) var(--border-dark);
}

.feature-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-lg) var(--border-light);
}

body.dark .feature-card:hover {
  box-shadow: var(--shadow-lg) var(--border-dark);
}

.feature-card-tag {
  display: inline-block;
  width: fit-content;
  padding: 0.2rem 0.5rem;
  border: 2px solid var(--border-light);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

body.dark .feature-card-tag {
  border-color: var(--border-dark);
}

.tag-browser  { background: var(--electric-blue); color: #fff; }
.tag-terminal { background: var(--lime-green); color: #000; }
.tag-render   { background: var(--purple-accent); color: #fff; }
.tag-safe     { background: var(--warm-coral); color: #000; }
.tag-pipe     { background: var(--cyan-accent); color: #000; }
.tag-zero     { background: var(--yellow-accent); color: #000; }

body.dark .tag-browser  { background: #1e3a5c; color: #fff; }
body.dark .tag-terminal { background: #3d6600; color: #fff; }
body.dark .tag-render   { background: #341797; color: #fff; }
body.dark .tag-safe     { background: #b2432e; color: #fff; }
body.dark .tag-pipe     { background: #007a8a; color: #fff; }
body.dark .tag-zero     { background: #bba701; color: #fff; }

.feature-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.25rem 0;
}

.feature-card-detail {
  font-size: 0.85rem;
  color: var(--muted-light);
}

body.dark .feature-card-detail {
  color: var(--muted-dark);
}

/* ===== INSTALL CARD ===== */
.readme-card {
  border: var(--border-w) solid var(--border-light);
  background: var(--surface-light);
  box-shadow: var(--shadow-lg) var(--border-light);
  padding: 2rem;
}

body.dark .readme-card {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  box-shadow: var(--shadow-lg) var(--border-dark);
}

.install-commands {
  display: grid;
  gap: 0.75rem;
}

.install-commands h3 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.5rem;
}

/* ===== PRE / COPY BUTTON ===== */
pre {
  position: relative;
  margin: 0;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  border: var(--border-w) solid var(--border-light);
  background: #0a0a0a;
  color: #e5e5e5;
  font-family: inherit;
  font-size: 0.82rem;
  line-height: 1.55;
}

body.dark pre {
  border-color: var(--border-dark);
  background: #000;
}

.copy-btn {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.55rem;
  border: 2px solid var(--border-dark);
  background: var(--surface-dark);
  color: var(--text-dark);
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, transform 0.14s, box-shadow 0.14s;
  box-shadow: 2px 2px 0 var(--border-dark);
  z-index: 1;
}

pre:hover .copy-btn,
.copy-btn:focus-visible {
  opacity: 1;
}

.copy-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--border-dark);
}

.copy-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 0 0 0 var(--border-dark);
}

.copy-btn.copied {
  background: var(--lime-green);
  color: #000;
  border-color: var(--border-light);
  opacity: 1;
}

body.dark .copy-btn.copied {
  background: #3d6600;
  color: #fff;
  border-color: var(--border-dark);
}

/* ===== FLAGS TABLE (landing) ===== */
.flag-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.5rem;
  font-size: 0.85rem;
}

.flag-table th, .flag-table td {
  padding: 0.75rem;
  border: var(--border-w) solid var(--border-light);
  text-align: left;
  vertical-align: top;
}

body.dark .flag-table th,
body.dark .flag-table td {
  border-color: var(--border-dark);
}

.flag-table th {
  background: var(--cyan-accent);
  color: #000;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

body.dark .flag-table th {
  background: #007a8a;
  color: #fff;
}

.flag-table td {
  background: var(--surface-light);
}

body.dark .flag-table td {
  background: var(--surface-dark);
}

.flag-table code {
  font-size: 0.8rem;
  background: rgba(0,0,0,0.06);
  padding: 0.15rem 0.35rem;
  border: 1px solid rgba(0,0,0,0.1);
}

body.dark .flag-table code {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.1);
}

/* ===== FOOTER ===== */
.footer {
  padding: 2rem 0 3rem;
  font-size: 0.85rem;
  color: var(--muted-light);
  border-top: var(--border-w) solid var(--border-light);
  margin-top: 2rem;
}

body.dark .footer {
  color: var(--muted-dark);
  border-color: var(--border-dark);
}

.footer code {
  font-size: 0.8rem;
  background: rgba(0,0,0,0.06);
  padding: 0.15rem 0.35rem;
  border: 1px solid rgba(0,0,0,0.1);
}

body.dark .footer code {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.1);
}

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

/* ===== DOC-PAGE HERO ===== */
.doc-hero {
  padding: 1.5rem 0 1.25rem;
}

.doc-hero-eyebrow {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border: var(--border-w) solid var(--border-light);
  background: var(--electric-blue);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-sm) var(--border-light);
  margin-bottom: 0.75rem;
}

body.dark .doc-hero-eyebrow {
  border-color: var(--border-dark);
  background: #1e3a5c;
  box-shadow: var(--shadow-sm) var(--border-dark);
}

.doc-hero h1 {
  font-size: clamp(1.75rem, 3.8vw, 2.4rem);
  max-width: 24ch;
  margin-top: 0.5rem;
}

.doc-hero-desc {
  margin-top: 0.5rem;
  max-width: 60ch;
  color: var(--muted-light);
  font-size: 0.95rem;
}

body.dark .doc-hero-desc {
  color: var(--muted-dark);
}

/* ===== MARKDOWN BODY ===== */
.markdown-body {
  display: grid;
  gap: 1rem;
  padding: 1.75rem 2rem;
  border: var(--border-w) solid var(--border-light);
  background: var(--surface-light);
  box-shadow: var(--shadow-md) var(--border-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

body.dark .markdown-body {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  box-shadow: var(--shadow-md) var(--border-dark);
}

.markdown-body h1 {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  padding-bottom: 0.4rem;
  border-bottom: var(--border-w) solid var(--border-light);
}

body.dark .markdown-body h1 {
  border-color: var(--border-dark);
}

.markdown-body h2 {
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  margin-top: 1.25rem;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid var(--border-light);
  font-weight: 700;
}

body.dark .markdown-body h2 {
  border-color: var(--border-dark);
}

.markdown-body h3 {
  font-size: 1.15rem;
  margin-top: 1.25rem;
}

.markdown-body h4 {
  font-size: 1rem;
  margin-top: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.markdown-body p { margin: 0; }

.markdown-body ul, .markdown-body ol {
  margin: 0;
  padding-left: 1.4rem;
  display: grid;
  gap: 0.3rem;
}

.markdown-body li { line-height: 1.6; }

.markdown-body a {
  color: var(--electric-blue);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
  font-weight: 600;
}

body.dark .markdown-body a {
  color: var(--cyan-accent);
}

.markdown-body a:hover {
  background: var(--yellow-accent);
  color: #000;
}

body.dark .markdown-body a:hover {
  background: #bba701;
  color: #fff;
}

.markdown-body code {
  font-family: inherit;
  font-size: 0.85em;
  padding: 0.1rem 0.4rem;
  border: 2px solid var(--border-light);
  background: rgba(0,0,0,0.05);
  color: var(--vibrant-orange);
  font-weight: 600;
}

body.dark .markdown-body code {
  border-color: var(--border-dark);
  background: rgba(255,255,255,0.06);
  color: var(--yellow-accent);
}

.markdown-body pre {
  padding: 1rem 1.1rem;
  border: var(--border-w) solid var(--border-light);
  background: #0a0a0a;
  color: #e5e5e5;
  font-size: 0.85rem;
  line-height: 1.55;
  box-shadow: var(--shadow-sm) var(--border-light);
  overflow-x: auto;
}

body.dark .markdown-body pre {
  border-color: var(--border-dark);
  background: #000;
  box-shadow: var(--shadow-sm) var(--border-dark);
}

.markdown-body pre code,
body.dark .markdown-body pre code,
body.cyberpunk .markdown-body pre code,
body.solarized .markdown-body pre code {
  padding: 0;
  border: none;
  background: transparent;
  color: inherit;
  font-weight: 400;
}

.markdown-body pre code *,
body.dark .markdown-body pre code *,
body.cyberpunk .markdown-body pre code *,
body.solarized .markdown-body pre code * {
  background: transparent !important;
}

.markdown-body blockquote {
  margin: 0;
  padding: 0.75rem 1rem;
  border-left: 6px solid var(--hot-pink);
  background: var(--surface-light);
  font-style: normal;
  color: var(--muted-light);
}

body.dark .markdown-body blockquote {
  background: var(--surface-dark);
  color: var(--muted-dark);
  border-color: var(--hot-pink);
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  display: block;
  overflow-x: auto;
}

.markdown-body thead tr {
  background: var(--cyan-accent);
  color: #000;
}

body.dark .markdown-body thead tr {
  background: #007a8a;
  color: #fff;
}

.markdown-body th, .markdown-body td {
  padding: 0.65rem 0.85rem;
  border: var(--border-w) solid var(--border-light);
  text-align: left;
  vertical-align: top;
}

body.dark .markdown-body th,
body.dark .markdown-body td {
  border-color: var(--border-dark);
}

.markdown-body th {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  font-weight: 700;
}

.markdown-body td {
  background: var(--surface-light);
}

body.dark .markdown-body td {
  background: var(--surface-dark);
}

.markdown-body hr {
  border: none;
  border-top: var(--border-w) solid var(--border-light);
  margin: 1.5rem 0;
}

body.dark .markdown-body hr {
  border-color: var(--border-dark);
}

.markdown-body details {
  border: var(--border-w) solid var(--border-light);
  background: var(--surface-light);
  box-shadow: 2px 2px 0 var(--border-light);
  padding: 0.65rem 0.9rem;
  transition: box-shadow 0.14s, transform 0.14s;
}

body.dark .markdown-body details {
  border-color: var(--border-dark);
  background: var(--surface-dark);
  box-shadow: 2px 2px 0 var(--border-dark);
}

.markdown-body details[open] {
  box-shadow: 3px 3px 0 var(--border-light);
}

body.dark .markdown-body details[open] {
  box-shadow: 3px 3px 0 var(--border-dark);
}

.markdown-body details summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.markdown-body details summary::-webkit-details-marker {
  display: none;
}

.markdown-body details summary::before {
  content: "▸";
  display: inline-block;
  font-size: 0.9rem;
  transition: transform 0.15s;
}

.markdown-body details[open] summary::before {
  transform: rotate(90deg);
}

.markdown-body details[open] > *:not(summary) {
  margin-top: 0.75rem;
}

.markdown-body strong { font-weight: 700; }

.markdown-body > *:first-child { margin-top: 0; }

/* Hide leading hr (Jekyll injects from frontmatter horizontals) */
.markdown-body hr:first-child,
.markdown-body hr:first-child + *,
.markdown-body p:first-child + hr {
  display: none;
}

/* Flatten nested boxes inside <details> */
.markdown-body details td {
  background: transparent;
}
body.dark .markdown-body details td,
body.solarized .markdown-body details td {
  background: transparent;
}
.markdown-body details th,
.markdown-body details td {
  border-width: 1px;
  padding: 0.45rem 0.7rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .markdown-body {
    padding: 1.25rem 1.25rem;
  }
}

@media (max-width: 640px) {
  .container {
    width: calc(100% - 1rem);
    padding: 0 0.5rem;
  }

  .hero {
    padding: 2rem 0 1.5rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .neo-btn {
    width: 100%;
    justify-content: center;
  }

  .theme-switcher select {
    min-width: 130px;
    font-size: 0.75rem;
  }
}

/* ===== CYBERPUNK THEME ===== */
body.cyberpunk {
  --bg-dark: #0b0016;
  --surface-dark: #14002a;
  --text-dark: #eedcff;
  --border-dark: #ff36c0;
  --muted-dark: #b48dde;
  background-color: #0b0016;
  color: #eedcff;
  background-image:
    linear-gradient(rgba(255, 54, 192, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 247, 255, 0.05) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px;
}

body.cyberpunk .theme-switcher select,
body.cyberpunk .site-nav-brand,
body.cyberpunk .stat-card,
body.cyberpunk .neo-btn,
body.cyberpunk .breadcrumbs a,
body.cyberpunk .breadcrumbs [aria-current="page"],
body.cyberpunk .markdown-body,
body.cyberpunk .markdown-body details,
body.cyberpunk .feature-card,
body.cyberpunk .readme-card,
body.cyberpunk pre,
body.cyberpunk .markdown-body pre,
body.cyberpunk .markdown-body blockquote {
  border-color: #ff36c0;
  background: #14002a;
  color: #eedcff;
  box-shadow: 3px 3px 0 #00f7ff;
}

body.cyberpunk .neo-btn {
  box-shadow: 4px 4px 0 #00f7ff;
}

body.cyberpunk .neo-btn-primary {
  background: #ff36c0;
  color: #0b0016;
}

body.cyberpunk .neo-btn-accent {
  background: #00f7ff;
  color: #0b0016;
}

body.cyberpunk .site-nav-brand {
  background: #faff00;
  color: #0b0016;
  box-shadow: 3px 3px 0 #00f7ff;
}

body.cyberpunk .hero-eyebrow,
body.cyberpunk .doc-hero-eyebrow {
  background: #00f7ff;
  color: #0b0016;
  border-color: #ff36c0;
  box-shadow: 3px 3px 0 #ff36c0;
}

body.cyberpunk .breadcrumbs [aria-current="page"] {
  background: #faff00;
  color: #0b0016;
}

body.cyberpunk .site-nav a:not(.site-nav-brand):hover {
  background: #00f7ff;
  color: #0b0016;
  border-color: #ff36c0;
}

body.cyberpunk h1, body.cyberpunk h2 {
  text-shadow: 0 0 6px rgba(255, 54, 192, 0.35);
}

body.cyberpunk .hero h1 {
  color: #ffffff;
  text-shadow:
    0 0 8px rgba(255, 54, 192, 0.55),
    0 0 16px rgba(0, 247, 255, 0.35);
}

body.cyberpunk .markdown-body h1 {
  border-color: #ff36c0;
}

body.cyberpunk .markdown-body h2 {
  border-bottom-color: #00f7ff;
}

body.cyberpunk .markdown-body a {
  color: #00f7ff;
}

body.cyberpunk .markdown-body a:hover {
  background: #ff36c0;
  color: #0b0016;
}

body.cyberpunk .markdown-body code,
body.cyberpunk .flag-table code {
  background: rgba(255, 54, 192, 0.12);
  color: #faff00;
  border-color: #ff36c0;
}

body.cyberpunk .markdown-body thead tr,
body.cyberpunk .flag-table th {
  background: #ff36c0;
  color: #0b0016;
}

body.cyberpunk .flag-table td {
  background: #14002a;
}

body.cyberpunk .markdown-body th,
body.cyberpunk .markdown-body td,
body.cyberpunk .flag-table th,
body.cyberpunk .flag-table td {
  border-color: #ff36c0;
}

body.cyberpunk .markdown-body td {
  background: #14002a;
}

body.cyberpunk .markdown-body blockquote {
  border-left-color: #faff00;
  background: rgba(255, 54, 192, 0.08);
  color: #eedcff;
}

body.cyberpunk .divider,
body.cyberpunk .site-nav,
body.cyberpunk .footer {
  border-color: #ff36c0;
}

body.cyberpunk .footer {
  color: #b48dde;
}

body.cyberpunk pre {
  background: #05000d;
  color: #eedcff;
}

body.cyberpunk .copy-btn {
  background: #14002a;
  color: #00f7ff;
  border-color: #00f7ff;
  box-shadow: 2px 2px 0 #ff36c0;
}

body.cyberpunk .copy-btn.copied {
  background: #faff00;
  color: #0b0016;
  border-color: #ff36c0;
}

body.cyberpunk .theme-switcher select {
  background: #14002a;
  color: #faff00;
  border-color: #00f7ff;
  box-shadow: 3px 3px 0 #ff36c0;
}

body.cyberpunk .theme-switcher-chevron {
  color: #faff00;
}

body.cyberpunk .theme-switcher select option {
  background: #14002a;
  color: #faff00;
}

body.cyberpunk .feature-card-detail,
body.cyberpunk .doc-hero-desc,
body.cyberpunk .hero-desc,
body.cyberpunk .stat-label {
  color: #b48dde;
}

/* ===== SOLARIZED THEME ===== */
body.solarized {
  --bg-light: #fdf6e3;
  --surface-light: #eee8d5;
  --text-light: #073642;
  --border-light: #586e75;
  --muted-light: #93a1a1;

  background-color: #fdf6e3;
  color: #073642;
}

body.solarized .site-nav,
body.solarized .divider,
body.solarized .footer,
body.solarized .breadcrumbs a,
body.solarized .breadcrumbs [aria-current="page"],
body.solarized .stat-card,
body.solarized .neo-btn,
body.solarized .markdown-body,
body.solarized .markdown-body details,
body.solarized .feature-card,
body.solarized .readme-card,
body.solarized .theme-switcher select {
  border-color: #586e75;
  background: #eee8d5;
  color: #073642;
  box-shadow: 3px 3px 0 #586e75;
}

body.solarized .site-nav,
body.solarized .divider {
  background: transparent;
  box-shadow: none;
  border-top-color: #586e75;
  border-bottom-color: #586e75;
}

body.solarized .footer {
  background: transparent;
  box-shadow: none;
  color: #586e75;
  border-color: #586e75;
}

body.solarized .site-nav-brand {
  background: #268bd2;
  color: #fdf6e3;
  border-color: #073642;
  box-shadow: 3px 3px 0 #073642;
}

body.solarized .hero-eyebrow,
body.solarized .doc-hero-eyebrow {
  background: #859900;
  color: #fdf6e3;
  border-color: #073642;
  box-shadow: 3px 3px 0 #073642;
}

body.solarized .neo-btn-primary {
  background: #cb4b16;
  color: #fdf6e3;
}

body.solarized .neo-btn-accent {
  background: #268bd2;
  color: #fdf6e3;
}

body.solarized .breadcrumbs [aria-current="page"] {
  background: #b58900;
  color: #073642;
}

body.solarized .site-nav a:not(.site-nav-brand):hover {
  background: #b58900;
  color: #073642;
  border-color: #073642;
}

body.solarized h1, body.solarized h2,
body.solarized h3, body.solarized h4 {
  color: #073642;
  text-shadow: none;
}

body.solarized .markdown-body h1 {
  border-bottom-color: #586e75;
}

body.solarized .markdown-body h2 {
  border-bottom-color: #268bd2;
  color: #073642;
}

body.solarized .markdown-body h3 {
  color: #cb4b16;
}

body.solarized .markdown-body a {
  color: #268bd2;
  text-decoration-color: #268bd2;
}

body.solarized .markdown-body a:hover {
  background: #b58900;
  color: #073642;
}

body.solarized .markdown-body code,
body.solarized .flag-table code {
  background: #fdf6e3;
  color: #d33682;
  border-color: #93a1a1;
}

body.solarized .markdown-body pre {
  background: #002b36;
  color: #eee8d5;
  border-color: #073642;
  box-shadow: 3px 3px 0 #586e75;
}

body.solarized .markdown-body pre code {
  color: #eee8d5;
}

body.solarized .markdown-body thead tr,
body.solarized .flag-table th {
  background: #268bd2;
  color: #fdf6e3;
}

body.solarized .markdown-body th, body.solarized .markdown-body td,
body.solarized .flag-table th, body.solarized .flag-table td {
  border-color: #586e75;
}

body.solarized .markdown-body td,
body.solarized .flag-table td {
  background: #fdf6e3;
}

body.solarized .markdown-body blockquote {
  border-left-color: #6c71c4;
  background: #eee8d5;
  color: #586e75;
}

body.solarized .markdown-body details {
  box-shadow: 2px 2px 0 #586e75;
}

body.solarized .copy-btn {
  background: #073642;
  color: #eee8d5;
  border-color: #586e75;
  box-shadow: 2px 2px 0 #586e75;
}

body.solarized .copy-btn.copied {
  background: #859900;
  color: #fdf6e3;
}

body.solarized .theme-switcher select {
  background: #eee8d5;
  color: #073642;
  border-color: #586e75;
}

body.solarized .theme-switcher-chevron {
  color: #073642;
}

body.solarized .theme-switcher select option {
  background: #eee8d5;
  color: #073642;
}

body.solarized .hero h1 {
  color: #073642;
}

body.solarized .feature-card-detail,
body.solarized .doc-hero-desc,
body.solarized .hero-desc,
body.solarized .stat-label {
  color: #586e75;
}