/* ============================================================
   PaintFE — Global Stylesheet
   Design language: "Signal Grid" — exposed-grid, neon-on-dark,
   brutalist meets precision, typographic tension
   ============================================================ */

:root {
  --bg:         #0a0a0b;
  --bg1:        #111114;
  --bg2:        #17171c;
  --bg3:        #1e1e26;
  --border:     #2a2a35;
  --border-lit: #3d3d55;
  --text:       #e8e8f0;
  --text-dim:   #7a7a90;
  --text-faint: #3d3d55;
  --accent:     #6c63ff;
  --accent2:    #ff6b9d;
  --accent3:    #00e5c8;
  --accent4:    #f7c948;
  --mono:       'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --sans:       'Inter', system-ui, -apple-system, sans-serif;
  --serif:      'Georgia', serif;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --glow-accent: 0 0 20px rgba(108, 99, 255, 0.3);
  --glow-accent3: 0 0 20px rgba(0, 229, 200, 0.3);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── Typography ── */
h1, h2, h3, h4, h5 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

a {
  color: var(--accent3);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #fff; }

code, pre, .mono {
  font-family: var(--mono);
  font-size: 0.875em;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-lit); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── Grid background texture ── */
.grid-bg {
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center center;
}

/* ── Header / Nav ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 56px;
  background: rgba(10, 10, 11, 0.88);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(1.4);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.04em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo-mark {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0;
  font-family: var(--mono);
  box-shadow: var(--glow-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 32px;
  flex: 1;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--bg2);
}
.nav-links a.active {
  color: var(--accent3);
  background: rgba(0, 229, 200, 0.08);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--glow-accent);
}
.btn-primary:hover {
  background: #7d76ff;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 0 30px rgba(108, 99, 255, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-lit);
  background: var(--bg2);
}

.btn-outline-accent {
  background: transparent;
  color: var(--accent3);
  border: 1px solid var(--accent3);
}
.btn-outline-accent:hover {
  background: rgba(0, 229, 200, 0.1);
  color: #fff;
  box-shadow: var(--glow-accent3);
}

/* ── Section structure ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-sm {
  padding: 60px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-full {
  padding: 100px 24px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent3);
  margin-bottom: 16px;
  padding: 5px 12px;
  border: 1px solid rgba(0, 229, 200, 0.25);
  border-radius: 4px;
  background: rgba(0, 229, 200, 0.05);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 16px;
  line-height: 1.1;
}

.section-sub {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 600px;
  line-height: 1.7;
}

/* ── Cards ── */
.card {
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: all var(--transition);
}
.card:hover {
  border-color: var(--border-lit);
  background: var(--bg2);
  transform: translateY(-2px);
}

.card-glow:hover {
  box-shadow: 0 0 40px rgba(108, 99, 255, 0.12);
  border-color: rgba(108, 99, 255, 0.4);
}

/* ── Code blocks ── */
.code-block {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

.code-block-header .dots {
  display: flex;
  gap: 6px;
}
.code-block-header .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green { background: #28c840; }

.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #cdd6f4;
}

/* Syntax */
.tok-kw    { color: #cba6f7; }
.tok-fn    { color: #89b4fa; }
.tok-str   { color: #a6e3a1; }
.tok-num   { color: #fab387; }
.tok-cmt   { color: #6c7086; font-style: italic; }
.tok-op    { color: #89dceb; }
.tok-type  { color: #f9e2af; }
.tok-id    { color: #cdd6f4; }

/* ── Dividers ── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0 auto;
  max-width: 1200px;
}

/* ── Grid layouts ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 60px 16px; }
  .section-title { font-size: 2rem; }
}

/* ── Tags / Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.badge-rust    { background: rgba(247, 76, 0, 0.15); color: #f74c00; border: 1px solid rgba(247, 76, 0, 0.25); }
.badge-free    { background: rgba(0, 229, 200, 0.12); color: var(--accent3); border: 1px solid rgba(0, 229, 200, 0.25); }
.badge-oss     { background: rgba(108, 99, 255, 0.12); color: var(--accent); border: 1px solid rgba(108, 99, 255, 0.25); }
.badge-gpu     { background: rgba(255, 107, 157, 0.12); color: var(--accent2); border: 1px solid rgba(255, 107, 157, 0.25); }
.badge-new     { background: rgba(247, 201, 72, 0.12); color: var(--accent4); border: 1px solid rgba(247, 201, 72, 0.25); }

/* ── Pill tabs ── */
.tab-bar {
  display: flex;
  gap: 4px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  width: fit-content;
  margin-bottom: 32px;
}
.tab-item {
  padding: 7px 18px;
  border-radius: 7px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}
.tab-item:hover { color: var(--text); }
.tab-item.active {
  background: var(--bg3);
  color: var(--text);
  box-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

/* ── Feature highlight ── */
.feature-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 1.3rem;
  margin-bottom: 16px;
  flex-shrink: 0;
}

/* ── Noise overlay on hero ── */
.noise-overlay {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.4;
}

/* ── Animated gradient border ── */
.glow-border {
  position: relative;
}
.glow-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent3));
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition);
}
.glow-border:hover::before { opacity: 1; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
}
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 0.82rem;
  color: var(--text-dim);
}
.footer-links a:hover { color: var(--text); }
.footer-copy {
  font-size: 0.78rem;
  color: var(--text-faint);
  font-family: var(--mono);
}

/* ── Utility ── */
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mt-64 { margin-top: 64px; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }
.text-center { text-align: center; }
.text-dim { color: var(--text-dim); }
.text-accent { color: var(--accent); }
.text-accent2 { color: var(--accent2); }
.text-accent3 { color: var(--accent3); }
.text-accent4 { color: var(--accent4); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.w-full { width: 100%; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }
.italic { font-style: italic; }
.small { font-size: 0.82rem; }
.muted { color: var(--text-dim); font-size: 0.85rem; }

/* ── Horizontal rule with label ── */
.hr-label {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 48px 0 32px;
  color: var(--text-faint);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.hr-label::before, .hr-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Table ── */
.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.doc-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.doc-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.5;
}
.doc-table tr:hover td {
  background: var(--bg2);
}
.doc-table code {
  background: var(--bg3);
  padding: 2px 7px;
  border-radius: 4px;
  color: var(--accent3);
  font-size: 0.8rem;
}

/* ── Sidebar layout (docs pages) ── */
.docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  min-height: 100vh;
  padding-top: 56px;
}

.docs-sidebar {
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 32px 0;
  background: var(--bg1);
}

.docs-sidebar-section {
  padding: 0 0 24px;
}

.docs-sidebar-title {
  padding: 0 20px 8px;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.docs-sidebar a {
  display: block;
  padding: 7px 20px;
  font-size: 0.83rem;
  color: var(--text-dim);
  transition: all var(--transition);
  border-left: 2px solid transparent;
}
.docs-sidebar a:hover {
  color: var(--text);
  background: var(--bg2);
}
.docs-sidebar a.active {
  color: var(--accent3);
  background: rgba(0, 229, 200, 0.06);
  border-left-color: var(--accent3);
}

.docs-content {
  padding: 48px 56px;
  max-width: 900px;
}

@media (max-width: 900px) {
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { display: none; }
  .docs-content { padding: 32px 20px; }
}

/* ── Tool grid items ── */
.tool-entry {
  padding: 16px;
  border-radius: 10px;
  background: var(--bg1);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.tool-entry:hover {
  border-color: var(--accent);
  background: var(--bg2);
}
.tool-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 5px;
}
.tool-short {
  font-size: 0.82rem;
  color: #9898b4;
  line-height: 1.55;
}
.tool-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: var(--bg3);
  border: 1px solid var(--border-lit);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent4);
  margin-left: auto;
  flex-shrink: 0;
}

/* ── Hero canvas placeholder ── */
.hero-canvas-placeholder {
  position: relative;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg2);
  overflow: hidden;
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-canvas-placeholder .placeholder-txt {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  text-align: center;
  padding: 20px;
}

/* ── Accent line decoration ── */
.accent-line {
  height: 2px;
  width: 48px;
  background: linear-gradient(90deg, var(--accent), var(--accent3));
  border-radius: 1px;
  margin: 16px 0;
}

/* ── Number counters ── */
.stat-num {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  font-family: var(--mono);
  background: linear-gradient(135deg, var(--text) 0%, var(--accent3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Platform icons ── */
.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 500;
  transition: all var(--transition);
}
.platform-badge:hover {
  border-color: var(--border-lit);
  color: var(--text);
}

/* ── FAQ accordion ── */
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-q {
  width: 100%;
  text-align: left;
  padding: 20px 0;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: var(--sans);
}
.faq-q:hover { color: var(--accent3); }
.faq-q .chevron {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--text-dim);
}
.faq-item.open .faq-q .chevron { transform: rotate(180deg); }
.faq-a {
  display: none;
  padding-bottom: 20px;
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 680px;
}
.faq-item.open .faq-a { display: block; }

/* ── Announcement bar ── */
.announce-bar {
  background: linear-gradient(90deg, rgba(108,99,255,0.15), rgba(0,229,200,0.15));
  border-bottom: 1px solid rgba(108,99,255,0.2);
  text-align: center;
  padding: 10px 24px;
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--mono);
}
.announce-bar strong { color: var(--text); }
.announce-bar a { color: var(--accent3); }

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1), transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Staggered children */
.reveal-group > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1), transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal-group.visible > *:nth-child(1)  { opacity:1; transform:translateY(0); transition-delay: 0.05s; }
.reveal-group.visible > *:nth-child(2)  { opacity:1; transform:translateY(0); transition-delay: 0.10s; }
.reveal-group.visible > *:nth-child(3)  { opacity:1; transform:translateY(0); transition-delay: 0.15s; }
.reveal-group.visible > *:nth-child(4)  { opacity:1; transform:translateY(0); transition-delay: 0.20s; }
.reveal-group.visible > *:nth-child(5)  { opacity:1; transform:translateY(0); transition-delay: 0.25s; }
.reveal-group.visible > *:nth-child(6)  { opacity:1; transform:translateY(0); transition-delay: 0.30s; }
.reveal-group.visible > *:nth-child(7)  { opacity:1; transform:translateY(0); transition-delay: 0.35s; }
.reveal-group.visible > *:nth-child(8)  { opacity:1; transform:translateY(0); transition-delay: 0.40s; }
.reveal-group.visible > *:nth-child(9)  { opacity:1; transform:translateY(0); transition-delay: 0.45s; }
.reveal-group.visible > *:nth-child(10) { opacity:1; transform:translateY(0); transition-delay: 0.50s; }
.reveal-group.visible > *:nth-child(11) { opacity:1; transform:translateY(0); transition-delay: 0.55s; }
.reveal-group.visible > *:nth-child(12) { opacity:1; transform:translateY(0); transition-delay: 0.60s; }
.reveal-group.visible > *:nth-child(n+13) { opacity:1; transform:translateY(0); transition-delay: 0.60s; }
/* Slide-in from left */
.reveal-left {
  opacity: 0;
  transform: translateX(-32px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1), transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal-left.visible { opacity:1; transform:translateX(0); }
/* Scale-up reveal */
.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal-scale.visible { opacity:1; transform:scale(1); }
/* Glow pulse on hover for interactive cards */
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,229,200,0); }
  50% { box-shadow: 0 0 22px 4px rgba(0,229,200,0.18); }
}
.card-glow-hover:hover {
  animation: glowPulse 2s ease infinite;
}
/* Counter count-up shimmer */
@keyframes countShimmer {
  from { background-position: -200% center; }
  to { background-position: 200% center; }
}
.stat-shimmer {
  background: linear-gradient(90deg, var(--accent3) 0%, #fff 50%, var(--accent3) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: countShimmer 3s linear infinite;
}
/* Subtle line draw for hr-label */
@keyframes lineGrow {
  from { width: 0; opacity: 0; }
  to { width: 100%; opacity: 1; }
}

/* ── Mobile nav toggle ── */
.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  margin-left: auto;
  padding: 6px;
}
@media (max-width: 768px) {
  .nav-mobile-toggle { display: flex; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 56px; left: 0; right: 0; background: var(--bg1); border-bottom: 1px solid var(--border); padding: 16px; gap: 4px; }
}
/* ── Ambient blobs (lava lamp background) ── */
.blob-layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0;
  animation: blobDrift var(--dur, 22s) ease-in-out infinite var(--delay, 0s);
  will-change: transform, opacity;
}
@keyframes blobDrift {
  0%   { opacity: 0;    transform: translate(0, 0)       scale(1);    }
  8%   { opacity: var(--max-opacity, 0.10); }
  40%  { opacity: var(--max-opacity, 0.10); transform: translate(var(--tx1, 60px), var(--ty1, -50px)) scale(1.12); }
  75%  { opacity: var(--max-opacity, 0.10); transform: translate(var(--tx2, -40px), var(--ty2, 40px)) scale(0.92); }
  92%  { opacity: 0;    transform: translate(var(--tx3, 20px), var(--ty3, -20px)) scale(1.05); }
  100% { opacity: 0;    transform: translate(0, 0)       scale(1);    }
}
/* Scroll-driven frosted panel overlay variant */
.frosted-panel {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  backdrop-filter: blur(12px) saturate(1.5);
  -webkit-backdrop-filter: blur(12px) saturate(1.5);
  border-radius: 16px;
}

/* ── Light Theme ── */
[data-theme="light"] {
  --bg:         #f4f4f7;
  --bg1:        #ffffff;
  --bg2:        #eaeaf0;
  --bg3:        #e0e0ea;
  --border:     #d0d0de;
  --border-lit: #b4b4cc;
  --text:       #18182a;
  --text-dim:   #55556e;
  --text-faint: #b4b4c8;
  --accent3:    #007a6e;
  --glow-accent:  0 0 16px rgba(108,99,255,0.18);
  --glow-accent3: 0 0 16px rgba(0,130,118,0.18);
}
[data-theme="light"] body {
  background: var(--bg);
  color: var(--text);
}
[data-theme="light"] .site-nav {
  background: rgba(244,244,247,0.92);
  border-bottom-color: var(--border);
}
[data-theme="light"] .grid-bg {
  background-image:
    linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
[data-theme="light"] .noise-overlay { display: none; }
[data-theme="light"] .hero-headline { color: #18182a; }
[data-theme="light"] .hero-headline .grad {
  background: linear-gradient(135deg, #18182a 0%, var(--accent) 50%, #0098a0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
[data-theme="light"] .hero-sub { color: #44445a; }
[data-theme="light"] .btn-ghost {
  color: var(--text-dim);
  border-color: var(--border);
}
[data-theme="light"] .btn-ghost:hover {
  color: var(--text);
  background: var(--bg2);
  border-color: var(--border-lit);
}
[data-theme="light"] code, [data-theme="light"] pre {
  background: var(--bg2);
  color: #33334a;
}
[data-theme="light"] ::-webkit-scrollbar-track { background: var(--bg2); }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: var(--border-lit); }
[data-theme="light"] .frosted-panel {
  background: rgba(0,0,0,0.03);
  border-color: rgba(0,0,0,0.08);
}
[data-theme="light"] .nav-links.open {
  background: var(--bg1);
  border-bottom-color: var(--border);
}

/* Light-mode syntax token colours (Catppuccin Latte-inspired) */
[data-theme="light"] .code-block pre { color: #1e1e2e; }
[data-theme="light"] .tok-kw   { color: #7c3aed; }
[data-theme="light"] .tok-fn   { color: #1d4ed8; }
[data-theme="light"] .tok-str  { color: #16a34a; }
[data-theme="light"] .tok-num  { color: #c2410c; }
[data-theme="light"] .tok-cmt  { color: #6b7280; font-style: italic; }
[data-theme="light"] .tok-op   { color: #0891b2; }
[data-theme="light"] .tok-type { color: #b45309; }
[data-theme="light"] .tok-id   { color: #18182a; }

/* ── Theme toggle button ── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
  padding: 0;
  font-size: 1rem;
  line-height: 1;
}
.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-lit);
  background: var(--bg2);
}
.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun  { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun  { display: block; }