/* ============================================================
   SAIL — Steampunk-Modern Stylesheet
   Palette: void black, copper, brass, parchment, amber
   ============================================================ */

/* ── Fonts ─────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700&family=Share+Tech+Mono&family=Inter:wght@300;400;500;600&display=swap');

/* ── CSS Custom Properties ──────────────────────────────────── */
:root {
  --bg-void:        #0a0704;
  --bg-dark:        #120c06;
  --bg-mid:         #1c1409;
  --bg-panel:       #221a0e;
  --bg-panel-hover: #2e2310;
  --bg-code:        #0e1a0e;

  --copper:         #b5651d;
  --copper-light:   #cd853f;
  --copper-bright:  #d2691e;
  --brass:          #c9a84c;
  --brass-light:    #e0c068;
  --gold:           #d4a843;

  --parchment:      #f0e6d3;
  --parchment-dim:  #c8b89a;
  --parchment-muted:#9a8a72;

  --amber:          #ffb000;
  --green-term:     #39d353;
  --red-steam:      #c0392b;

  --border-copper:  rgba(181, 101, 29, 0.4);
  --border-brass:   rgba(201, 168, 76, 0.35);

  --shadow-copper:  0 0 20px rgba(181, 101, 29, 0.25);
  --shadow-brass:   0 0 30px rgba(201, 168, 76, 0.15);

  --radius:         4px;
  --radius-lg:      8px;
  --transition:     0.25s ease;
  --font-body:      'Inter', system-ui, sans-serif;
  --font-heading:   'Cinzel', serif;
  --font-mono:      'Share Tech Mono', 'Fira Code', monospace;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-void);
  color: var(--parchment);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--copper); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--copper-light); }

/* ── Selection ──────────────────────────────────────────────── */
::selection { background: var(--copper); color: var(--bg-void); }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--brass-light);
  letter-spacing: 0.04em;
  line-height: 1.25;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 600; }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; color: var(--brass); }

p { color: var(--parchment-dim); margin-bottom: 1rem; }

a {
  color: var(--copper-light);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--brass-light); }

strong { color: var(--parchment); font-weight: 600; }
em { color: var(--brass); font-style: italic; }

code {
  font-family: var(--font-mono);
  background: var(--bg-code);
  color: var(--green-term);
  padding: 0.15em 0.4em;
  border-radius: var(--radius);
  font-size: 0.88em;
  border: 1px solid rgba(57, 211, 83, 0.2);
}

pre {
  background: var(--bg-code);
  border: 1px solid rgba(57, 211, 83, 0.2);
  border-left: 3px solid var(--green-term);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  position: relative;
  margin: 1.5rem 0;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--green-term);
  font-size: inherit;
}

/* ── Steampunk Gear Decoration ──────────────────────────────── */
.gear-decoration {
  position: absolute;
  opacity: 0.06;
  pointer-events: none;
  animation: gear-spin 40s linear infinite;
}
.gear-decoration.reverse { animation-direction: reverse; animation-duration: 30s; }

@keyframes gear-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ── Rivet Pattern ──────────────────────────────────────────── */
.rivets {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0.75rem 0;
}
.rivet {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--brass-light), var(--copper));
  box-shadow: 0 0 4px var(--copper);
  flex-shrink: 0;
}
.rivet-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-copper), transparent);
}

/* ── Steam Divider ──────────────────────────────────────────── */
.steam-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 3rem 0;
}
.steam-divider::before, .steam-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--copper), transparent);
}
.steam-divider-icon {
  color: var(--copper);
  font-size: 1.2rem;
  opacity: 0.8;
}

/* ── Hex Badge ──────────────────────────────────────────────── */
.hex-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(181, 101, 29, 0.12);
  border: 1px solid var(--border-copper);
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.3em 0.8em;
  border-radius: var(--radius);
  letter-spacing: 0.05em;
}

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 7, 4, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-copper);
  padding: 0 2rem;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.nav-logo-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--copper) 0%, var(--brass) 100%);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--bg-void);
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(181, 101, 29, 0.4);
}

.nav-logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--brass-light);
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--parchment-dim);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 1px;
  background: var(--copper);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-links a:hover { color: var(--brass-light); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta {
  background: linear-gradient(135deg, var(--copper) 0%, var(--brass) 100%) !important;
  color: var(--bg-void) !important;
  font-weight: 600 !important;
  padding: 0.45em 1.2em !important;
  border-radius: var(--radius) !important;
  box-shadow: var(--shadow-copper) !important;
  transition: transform var(--transition), box-shadow var(--transition) !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover {
  transform: translateY(-1px) !important;
  box-shadow: 0 0 24px rgba(181, 101, 29, 0.5) !important;
}

.nav-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--parchment-dim);
}

/* ── Hero Section ───────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 5rem 2rem 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 50%, rgba(181, 101, 29, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 20% 80%, rgba(201, 168, 76, 0.04) 0%, transparent 50%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23b5651d' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  margin-bottom: 1.5rem;
}

.hero-title {
  margin-bottom: 0.5rem;
}

.hero-title .accent { color: var(--copper); }

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--brass);
  font-family: var(--font-heading);
  margin-bottom: 1.5rem;
  letter-spacing: 0.04em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--parchment-dim);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 480px;
}

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

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75em 1.75em;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--copper) 0%, var(--brass) 100%);
  color: var(--bg-void);
  box-shadow: var(--shadow-copper);
}
.btn-primary:hover {
  color: var(--bg-void);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(181, 101, 29, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--brass-light);
  border: 1px solid var(--border-brass);
}
.btn-outline:hover {
  color: var(--brass-light);
  border-color: var(--brass);
  background: rgba(201, 168, 76, 0.08);
  transform: translateY(-2px);
}

/* ── Hero Terminal ──────────────────────────────────────────── */
.hero-terminal {
  background: var(--bg-code);
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-copper), inset 0 0 40px rgba(0, 0, 0, 0.6);
}

.terminal-bar {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-copper);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.terminal-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.terminal-dot.red   { background: #ff5f57; }
.terminal-dot.amber { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--parchment-muted);
  margin-left: 0.5rem;
}

.terminal-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.8;
}

.terminal-comment { color: #555e4e; }
.terminal-cmd     { color: var(--green-term); }
.terminal-prompt  { color: var(--copper); }
.terminal-out     { color: var(--parchment-muted); }
.terminal-success { color: var(--brass); }
.terminal-cursor  {
  display: inline-block;
  width: 8px; height: 1.1em;
  background: var(--green-term);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* ── Section ─────────────────────────────────────────────────── */
section { padding: 5rem 2rem; }
.section-inner { max-width: 1100px; margin: 0 auto; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--copper);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--parchment-dim);
  max-width: 600px;
  margin-bottom: 3rem;
  line-height: 1.8;
}

/* ── Why Section ─────────────────────────────────────────────── */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.why-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.why-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--copper), var(--brass));
  opacity: 0;
  transition: opacity var(--transition);
}

.why-card:hover {
  border-color: var(--copper);
  transform: translateY(-4px);
  box-shadow: var(--shadow-copper);
}
.why-card:hover::before { opacity: 1; }

.why-icon {
  width: 48px; height: 48px;
  border: 1px solid var(--border-copper);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  background: rgba(181, 101, 29, 0.08);
}

.why-card h3 {
  color: var(--brass-light);
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.why-card p {
  color: var(--parchment-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin: 0;
}

/* ── Architecture Section ───────────────────────────────────── */
.arch-section { background: var(--bg-dark); }

.arch-diagram {
  background: var(--bg-panel);
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-lg);
  padding: 2rem;
  overflow-x: auto;
  margin: 2rem 0;
}

.arch-diagram pre {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  color: var(--parchment-muted);
  font-size: 0.85rem;
  border-left: none;
}

.arch-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.flow-step {
  background: var(--bg-mid);
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
}

.flow-step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--copper);
  letter-spacing: 0.08em;
}

.flow-step h4 {
  font-size: 0.95rem;
  color: var(--brass-light);
  margin: 0;
}

.flow-step p {
  font-size: 0.85rem;
  color: var(--parchment-muted);
  margin: 0;
}

/* ── Quickstart Preview ─────────────────────────────────────── */
.quickstart-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.qs-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  align-items: start;
}

.qs-num {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 2px solid var(--copper);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--copper);
  flex-shrink: 0;
  background: rgba(181, 101, 29, 0.08);
}

.qs-content h3 {
  font-size: 1.05rem;
  color: var(--brass-light);
  margin-bottom: 0.5rem;
}

.qs-content p {
  font-size: 0.95rem;
  color: var(--parchment-muted);
  margin-bottom: 0.75rem;
}

/* ── Components Section ─────────────────────────────────────── */
.components-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.component-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-copper);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.component-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-copper);
}

.component-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--copper);
  background: rgba(181, 101, 29, 0.12);
  border: 1px solid var(--border-copper);
  padding: 0.2em 0.7em;
  border-radius: var(--radius);
  display: inline-block;
  margin-bottom: 0.75rem;
  letter-spacing: 0.06em;
}

.component-card h3 {
  font-size: 1.1rem;
  color: var(--brass-light);
  margin-bottom: 0.6rem;
}

.component-card p {
  font-size: 0.9rem;
  color: var(--parchment-muted);
  margin: 0;
}

/* ── YAML Example ───────────────────────────────────────────── */
.yaml-section { background: var(--bg-dark); }

.yaml-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

.yaml-annotation {
  list-style: none;
  margin-top: 1rem;
}

.yaml-annotation li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(181, 101, 29, 0.12);
  color: var(--parchment-dim);
  font-size: 0.9rem;
}

.yaml-annotation li:last-child { border-bottom: none; }

.yaml-annotation .tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--green-term);
  background: rgba(57, 211, 83, 0.08);
  border: 1px solid rgba(57, 211, 83, 0.2);
  padding: 0.15em 0.5em;
  border-radius: var(--radius);
  flex-shrink: 0;
  white-space: nowrap;
}

/* ── Stack Section ──────────────────────────────────────────── */
.stack-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.stack-pill {
  background: var(--bg-panel);
  border: 1px solid var(--border-copper);
  border-radius: 999px;
  padding: 0.5em 1.25em;
  font-size: 0.9rem;
  color: var(--parchment-dim);
  transition: border-color var(--transition), color var(--transition);
}
.stack-pill:hover { border-color: var(--brass); color: var(--brass-light); }
.stack-pill strong { color: var(--copper-light); }

/* ── CTA Banner ─────────────────────────────────────────────── */
.cta-section {
  background: var(--bg-panel);
  border-top: 1px solid var(--border-copper);
  border-bottom: 1px solid var(--border-copper);
}

.cta-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  padding: 5rem 2rem;
}

.cta-inner h2 { margin-bottom: 1rem; }
.cta-inner p { font-size: 1.1rem; margin-bottom: 2.5rem; }

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-copper);
  padding: 3rem 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}

.footer-brand { }

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.footer-logo-mark {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--copper), var(--brass));
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--bg-void);
  font-weight: 700;
}

.footer-logo-text {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--brass-light);
  letter-spacing: 0.08em;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--parchment-muted);
  max-width: 320px;
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-link-group h4 {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 1rem;
}

.footer-link-group ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-link-group a {
  font-size: 0.875rem;
  color: var(--parchment-muted);
}
.footer-link-group a:hover { color: var(--brass-light); }

.footer-bottom {
  max-width: 1100px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(181, 101, 29, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--parchment-muted);
  margin: 0;
}

/* ── Copy Button ─────────────────────────────────────────────── */
.code-block-wrap {
  position: relative;
  margin: 1.5rem 0;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: rgba(181, 101, 29, 0.15);
  border: 1px solid var(--border-copper);
  color: var(--copper-light);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3em 0.75em;
  border-radius: var(--radius);
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: background var(--transition), color var(--transition);
}
.copy-btn:hover { background: rgba(181, 101, 29, 0.3); color: var(--brass-light); }
.copy-btn.copied { color: var(--green-term); border-color: var(--green-term); }

/* ── Alert / Note boxes ─────────────────────────────────────── */
.note, .tip, .warning {
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  border-left: 3px solid;
}
.note    { background: rgba(201, 168, 76, 0.08); border-color: var(--brass); color: var(--parchment-dim); }
.tip     { background: rgba(57, 211, 83, 0.06);  border-color: var(--green-term); color: var(--parchment-dim); }
.warning { background: rgba(192, 57, 43, 0.08);  border-color: var(--red-steam); color: var(--parchment-dim); }
.note strong, .tip strong, .warning strong { color: var(--parchment); }

/* ── Table ───────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}
th {
  background: var(--bg-panel);
  color: var(--brass);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-copper);
}
td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(181, 101, 29, 0.1);
  color: var(--parchment-dim);
}
tr:hover td { background: rgba(181, 101, 29, 0.04); }

/* ── Page Header (inner pages) ──────────────────────────────── */
.page-header {
  padding: 7rem 2rem 4rem;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border-copper);
  position: relative;
  overflow: hidden;
}
.page-header-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 80% at 50% 0%, rgba(181, 101, 29, 0.06) 0%, transparent 60%);
  pointer-events: none;
}
.page-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.page-header h1 { margin-bottom: 0.75rem; }
.page-header p {
  font-size: 1.1rem;
  color: var(--parchment-dim);
  max-width: 580px;
  margin: 0;
}

/* ── Quickstart Page Content ────────────────────────────────── */
.qs-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.qs-sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
}

.qs-sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--copper);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.qs-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.qs-nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--parchment-muted);
  border-left: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.qs-nav a:hover, .qs-nav a.active {
  color: var(--brass-light);
  border-color: var(--copper);
}

.qs-content { min-width: 0; }

.qs-section {
  margin-bottom: 4rem;
  scroll-margin-top: 80px;
}

.qs-section-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--copper);
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.qs-section h2 { margin-bottom: 1rem; }
.qs-section h3 { margin-top: 1.75rem; margin-bottom: 0.75rem; }
.qs-section p  { margin-bottom: 1rem; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-terminal { display: none; }
  .yaml-split { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
  .qs-layout { grid-template-columns: 1fr; }
  .qs-sidebar { display: none; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg-dark); border-bottom: 1px solid var(--border-copper); padding: 1rem 2rem; gap: 1rem; z-index: 999; }
  .nav-menu-toggle { display: block; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  section { padding: 3.5rem 1.25rem; }
  .page-header { padding: 6rem 1.25rem 3rem; }
}

/* ── Animated gradient border ───────────────────────────────── */
@keyframes borderGlow {
  0%, 100% { box-shadow: 0 0 8px rgba(181, 101, 29, 0.3); }
  50%       { box-shadow: 0 0 20px rgba(201, 168, 76, 0.4); }
}
.glow { animation: borderGlow 3s ease-in-out infinite; }

/* ── Loading animation ──────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.6s ease both;
}
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* ── Theme Toggle Button ────────────────────────────────────── */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-copper);
  cursor: pointer;
  padding: 0.35rem;
  color: var(--parchment-dim);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.theme-toggle:hover {
  color: var(--brass-light);
  border-color: var(--brass);
  background: rgba(201, 168, 76, 0.08);
}

/* Default (dark mode): show sun icon, hide moon */
.theme-icon-moon { display: none; }

/* Light mode: show moon icon, hide sun */
[data-theme="light"] .theme-icon-sun  { display: none; }
[data-theme="light"] .theme-icon-moon { display: block; }

/* ── Light Mode Theme ───────────────────────────────────────── */
[data-theme="light"] {
  --bg-void:        #faf6f0;
  --bg-dark:        #f2ebe0;
  --bg-mid:         #ebe0d0;
  --bg-panel:       #f5ede0;
  --bg-panel-hover: #ecddd0;
  --bg-code:        #f5f0e8;

  --parchment:      #2d1d0e;
  --parchment-dim:  #4a3020;
  --parchment-muted:#7a5c44;

  --green-term:     #1a7035;

  --border-copper:  rgba(181, 101, 29, 0.35);
  --border-brass:   rgba(160, 120, 40, 0.3);

  --shadow-copper:  0 0 20px rgba(181, 101, 29, 0.2);
  --shadow-brass:   0 0 30px rgba(201, 168, 76, 0.1);
}

/* Nav background in light mode (overrides hardcoded rgba) */
[data-theme="light"] .nav {
  background: rgba(250, 246, 240, 0.95);
}

/* Code/pre border color in light mode */
[data-theme="light"] code {
  border-color: rgba(26, 112, 53, 0.25);
}
[data-theme="light"] pre {
  border-color: rgba(26, 112, 53, 0.25);
  border-left-color: var(--green-term);
}

/* Terminal comment colour in light mode */
[data-theme="light"] .terminal-comment { color: #8a9070; }

/* Smooth transition when switching themes */
body,
.nav,
.why-card,
.component-card,
.flow-step,
.arch-diagram,
.hero-terminal,
.terminal-bar,
.page-header,
.footer,
.cta-section,
.stack-pill,
.qs-sidebar {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}