/* =========================================================
   RAVEN — Landing Page  (Neutral Dark + Violet theme)
   Palette mirrors src/ui/theme.rs
   ========================================================= */

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

:root {
  /* Backgrounds — pure neutral dark, no tint */
  --bg:         #1c1c20;
  --bg-card:    #242428;
  --bg-dark:    #181820;
  --bg-accent:  #20202a;

  /* Borders — barely-visible, violet-hinted */
  --border:     rgba(145, 95, 250, 0.12);
  --border-hi:  rgba(145, 95, 250, 0.25);

  /* Accent — electric violet (only interactive highlights) */
  --accent:       #915ffa;
  --accent-bright:#a87fff;
  --accent-dim:   #6a40d0;
  --accent-glow:  rgba(145, 95, 250, 0.35);

  /* Complementary palette */
  --teal:       #48c3a8;   /* CPI_PANEL */
  --steel:      #6eafdc;   /* cache / metrics */
  --amber:      #dcaa37;   /* PAUSED / CACHE_L2 */
  --gold:       #dab24b;   /* LABEL_Y */
  --green:      #58c878;   /* RUNNING */
  --danger:     #d24844;   /* DANGER */
  --violet-dim: #6c3e94;   /* DIRTY_DIM */
  --dirty:      #c369fa;   /* DIRTY */

  /* Text */
  --text:       #d2d2da;
  --text-muted: #696973;
  --text-dim:   #4a4a54;

  --font-mono:  'JetBrains Mono', 'Fira Code', monospace;
  --font-sans:  'Inter', system-ui, sans-serif;

  --radius:     10px;
  --radius-lg:  16px;
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(145, 95, 250, 0.08);
  border: 1px solid rgba(145, 95, 250, 0.18);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--teal);
}
kbd {
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 4px;
  padding: 1px 6px;
}

/* =========================================================
   LAYOUT
   ========================================================= */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section           { padding: 96px 0; }
.section--dark     { background: var(--bg-dark); }
.section--accent   { background: var(--bg-accent); }

.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 10px 0 16px;
  line-height: 1.2;
}
.section-header p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-bright);
  background: rgba(145, 95, 250, 0.08);
  border: 1px solid rgba(145, 95, 250, 0.22);
  border-radius: 100px;
  padding: 4px 12px;
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(145,95,250,0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-bright) 0%, var(--teal) 100%);
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(145,95,250,0.5);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--border-hi);
  color: var(--text);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
}
.btn-ghost {
  background: rgba(145,95,250,0.06);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-ghost:hover {
  background: rgba(145,95,250,0.12);
  color: var(--text);
}

/* =========================================================
   NAV
   ========================================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(28, 28, 32, 0.80);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.nav.scrolled {
  background: rgba(28, 28, 32, 0.97);
  border-bottom-color: var(--border-hi);
}
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  flex-shrink: 0;
}
.logo-text { font-family: var(--font-sans); letter-spacing: -0.02em; }
.logo-asm  { color: var(--accent-bright); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin: 0 auto;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav-links a:hover {
  color: var(--text);
  background: rgba(145,95,250,0.07);
}
.nav-cta { font-size: 0.85rem; padding: 8px 18px; }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  min-height: 100vh;
  padding: 120px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
  position: relative;
}

/* Background layer */
.hero-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}
.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(145,95,250,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(145,95,250,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent);
}
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.14;
}
.glow-1 {
  width: 800px; height: 500px;
  background: var(--accent);
  top: -200px; left: -150px;
}
.glow-2 {
  width: 500px; height: 400px;
  background: var(--teal);
  top: 250px; right: -120px;
}

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(145,95,250,0.06);
  border: 1px solid var(--border-hi);
  border-radius: 100px;
  padding: 5px 14px;
  margin-bottom: 28px;
}
.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-bright);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.35} }

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 22px;
}
.gradient-text {
  background: linear-gradient(125deg, var(--accent-bright) 0%, var(--teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}
.stat { display: flex; flex-direction: column; }
.stat-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-bright);
  line-height: 1;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.stat-div {
  width: 1px; height: 40px;
  background: var(--border-hi);
}

/* ── Hero visual: TUI preview ───────────────────────────── */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  position: relative;
}

.tui-frame {
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(145,95,250,0.08),
    0 24px 60px rgba(0,0,0,0.5),
    0 0 80px rgba(145,95,250,0.08);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.tui-topbar {
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  padding: 0 4px;
  gap: 0;
}
.tui-tab {
  padding: 9px 18px;
  color: var(--text-dim);
  font-size: 0.78rem;
  cursor: default;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}
.tui-tab--active {
  color: var(--accent-bright);
  border-bottom-color: var(--accent);
  background: rgba(145,95,250,0.06);
}
.tui-arch {
  margin-left: auto;
  padding: 6px 14px;
  font-size: 0.68rem;
  color: var(--teal);
  letter-spacing: 0.06em;
}

.tui-code {
  padding: 16px 0;
  min-height: 220px;
  line-height: 1.85;
}

.tui-line {
  padding: 1px 20px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.tui-line--pc {
  background: rgba(145,95,250,0.08);
  border-left: 2px solid var(--accent);
  padding-left: 18px;
}
.tui-pc-arrow {
  color: var(--accent-bright);
  font-size: 0.75rem;
}
.tui-gutter {
  color: var(--text-dim);
  font-size: 0.72rem;
  min-width: 28px;
  user-select: none;
  text-align: right;
}

.tui-statusbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  flex-wrap: wrap;
}
.tui-st-key   { color: var(--text-muted); }
.tui-st-sep   { color: var(--text-dim); }
.tui-st-val   { font-weight: 600; }
.tui-st-cyc   { color: var(--steel); }
.tui-st-cpi   { color: var(--metric-cpi, #af87f5); }
.tui-st-ipc   { color: var(--gold); }
.tui-st-ok    { color: var(--amber); font-weight: 700; letter-spacing: 0.06em; }

/* ── TUI Panel switching ─────────────────────────────────── */
.tui-tab         { cursor: pointer; }
.tui-panel       { display: block; }
.tui-panel--hidden { display: none; }

/* ── Run panel ───────────────────────────────────────────── */
.tui-run-layout {
  display: flex;
  height: 252px;
  overflow: hidden;
}
.tui-imem {
  flex: 1;
  overflow: hidden;
  border-right: 1px solid var(--border);
  padding: 6px 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.7;
}
.tui-imem-label {
  color: var(--gold);
  padding: 2px 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.73rem;
}
.tui-imem-row {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 1px 8px 1px 20px;
  color: var(--text-muted);
}
.tui-imem-row--pc {
  background: rgba(145, 95, 250, 0.09);
  border-left: 2px solid var(--accent);
  padding-left: 6px;
  color: var(--text);
}
.tui-addr {
  color: var(--text-dim);
  min-width: 30px;
  font-size: 0.68rem;
  flex-shrink: 0;
}
.tui-itext { flex: 1; white-space: nowrap; overflow: hidden; }
.tui-badge {
  font-size: 0.62rem;
  padding: 0 3px;
  border-radius: 3px;
  font-weight: 700;
  flex-shrink: 0;
  font-family: var(--font-mono);
}
.tui-badge--i   { color: var(--steel);          background: rgba(110,175,220,0.10); }
.tui-badge--r   { color: var(--accent-bright);  background: rgba(145,95,250,0.10);  }
.tui-badge--s   { color: var(--teal);           background: rgba(72,195,168,0.10);  }
.tui-badge--b   { color: var(--amber);          background: rgba(220,170,55,0.10);  }
.tui-badge--j   { color: var(--gold);           background: rgba(218,178,75,0.10);  }
.tui-badge--sys { color: var(--danger);         background: rgba(210,72,68,0.10);   }
.tui-heat {
  font-size: 0.64rem;
  color: var(--amber);
  flex-shrink: 0;
  font-family: var(--font-mono);
}
/* Register sidebar */
.tui-sidebar {
  width: 176px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.70rem;
  overflow: hidden;
}
.tui-reg-head {
  display: grid;
  grid-template-columns: 34px 1fr 1fr;
  padding: 4px 8px 3px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
}
.tui-reg-row {
  display: grid;
  grid-template-columns: 34px 1fr 1fr;
  padding: 2px 8px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(145,95,250,0.04);
}
.tui-reg-row--hi  { background: rgba(145, 95, 250, 0.08); }
.tui-reg-name     { color: var(--teal); }
.tui-reg-chg      { color: var(--accent-bright); }
.tui-reg-dec      { color: var(--text-dim); }

/* ── Instruction decoder (Run panel right side) ─────────── */
.tui-decoder {
  width: 178px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.70rem;
  overflow: hidden;
}
.tui-dec-instr {
  padding: 7px 10px 6px;
  color: var(--text);
  font-size: 0.76rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
}
.tui-dec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 2px 10px;
  gap: 4px;
}
.tui-dec-key  { color: var(--text-dim); flex-shrink: 0; min-width: 44px; }
.tui-dec-val  { color: var(--text-muted); text-align: right; }
.tui-dec-dim  { color: var(--text-dim); }
.tui-dec-reg  { color: var(--teal); }
.tui-dec-sep  { height: 1px; background: var(--border); margin: 3px 0; }
.tui-dec-cpi  {
  padding: 4px 10px;
  display: flex;
  gap: 6px;
  font-size: 0.71rem;
}

/* ── Cache panel ─────────────────────────────────────────── */
.tui-cache-layout {
  display: flex;
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
}
.tui-cache-box {
  flex: 1;
  background: var(--bg-card);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}
.tui-cache-title {
  font-weight: 700;
  font-size: 0.76rem;
  margin-bottom: 7px;
  letter-spacing: 0.05em;
}
.tui-cache-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  padding: 1px 0;
}
.tui-cache-val { color: var(--text); font-weight: 600; }
.tui-cache-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 0.70rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.tui-cache-config {
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--text-dim);
}

/* ── Docs panel ──────────────────────────────────────────── */
.tui-docs-layout {
  padding: 10px 0;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  overflow: hidden;
  height: 252px;
}
.tui-docs-title {
  padding: 2px 16px 6px;
  font-size: 0.70rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}
.tui-docs-row {
  display: grid;
  grid-template-columns: 52px 110px 1fr;
  gap: 6px;
  padding: 2px 16px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(145,95,250,0.04);
  line-height: 1.65;
}
.tui-docs-mnem { color: var(--steel);    font-weight: 600; }
.tui-docs-ops  { color: var(--teal);     }
.tui-docs-desc { color: var(--text-muted); }

/* Syntax inside TUI */
.tui-frame .hl-comment { color: #628a70; font-style: italic; }
.tui-frame .hl-dir     { color: #af87f5; }
.tui-frame .hl-label   { color: #dab24b; font-weight: 600; }
.tui-frame .hl-instr   { color: #73b2eb; }
.tui-frame .hl-reg     { color: #48c3a8; }
.tui-frame .hl-num     { color: #a87fff; }

/* =========================================================
   FEATURES
   ========================================================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature-card--large { grid-column: span 2; }

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: rgba(145,95,250,0.3);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.4),
    inset 0 1px 0 rgba(255,255,255,0.04),
    0 0 0 1px rgba(145,95,250,0.08);
  transform: translateY(-2px);
}
.feature-icon {
  width: 48px; height: 48px;
  background: rgba(145,95,250,0.08);
  border: 1px solid rgba(145,95,250,0.18);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-bright);
  margin-bottom: 18px;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}
.feature-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 18px;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(145,95,250,0.06);
  border: 1px solid rgba(145,95,250,0.14);
  border-radius: 6px;
  padding: 3px 8px;
  color: var(--text-muted);
}

/* =========================================================
   PIPELINE / HOW IT WORKS
   ========================================================= */
.pipeline {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 64px;
}
.pipeline-step {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
}
.pipeline-step::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  opacity: 0;
  transition: var(--transition);
}
.pipeline-step:hover::before { opacity: 1; }
.pipeline-arrow {
  font-size: 1.5rem;
  color: var(--accent);
  padding-top: 28px;
  opacity: 0.45;
}
.pipeline-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-bright);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.pipeline-step h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.pipeline-step p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* BIT LAYOUT */
.bit-layout {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.bit-layout-header {
  display: flex;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.bit-label { color: var(--accent-bright); }
.bit-fields {
  display: flex;
  height: 72px;
}
.bf {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border-right: 1px solid var(--border);
  padding: 8px 4px;
  transition: var(--transition);
  cursor: default;
}
.bf:last-child { border-right: none; }
.bf:hover      { filter: brightness(1.4); }
.bf-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
}
.bf-bits {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  opacity: 0.6;
}
.bf--funct7 { background: rgba(72,195,168,0.08);  color: var(--teal); }
.bf--rs2    { background: rgba(145,95,250,0.09);   color: var(--accent-bright); }
.bf--rs1    { background: rgba(106,64,208,0.08);   color: var(--accent-dim); }
.bf--f3     { background: rgba(218,178,75,0.08);   color: var(--gold); }
.bf--rd     { background: rgba(145,95,250,0.09);   color: var(--accent-bright); }
.bf--op     { background: rgba(168,127,255,0.12);  color: var(--accent-bright); }

/* =========================================================
   EXAMPLES TABS
   ========================================================= */
.examples-tabs {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.tab-buttons {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0 8px;
  gap: 2px;
  background: rgba(145,95,250,0.03);
}
.tab-btn {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 14px 18px;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--accent-bright);
  border-bottom-color: var(--accent);
}

.tab-panels { position: relative; }
.tab-panel { display: none; grid-template-columns: 1fr 340px; }
.tab-panel.active { display: grid; }

.code-pane { border-right: 1px solid var(--border); }
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(145,95,250,0.03);
}
.code-filename {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.code-lang {
  font-size: 0.73rem;
  color: var(--text-dim);
}

.hlcode {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.75;
  padding: 20px 24px;
  overflow-x: auto;
  white-space: pre;
  min-height: 320px;
}

/* Syntax colors — match RAVEN editor theme */
.hl-comment { color: #628a70; font-style: italic; }
.hl-dir     { color: #af87f5; }
.hl-label   { color: #dab24b; }
.hl-instr   { color: #73b2eb; }
.hl-pseudo  { color: var(--accent-bright); font-weight: 500; }
.hl-reg     { color: var(--teal); }
.hl-num     { color: var(--accent-bright); }
.hl-str     { color: #58c878; }
.hl-kw      { color: #af87f5; }

.example-info { padding: 28px; }
.example-info h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.example-info > p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
}
.example-highlights { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.example-highlights li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.example-highlights li::before {
  content: '→';
  color: var(--accent-bright);
  flex-shrink: 0;
}

/* =========================================================
   ISA GRID
   ========================================================= */
.isa-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.isa-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.isa-cat-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.isa-cat-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
}
.isa-r  { background: rgba(145,95,250,0.12);  color: var(--accent-bright); }
.isa-i  { background: rgba(72,195,168,0.12);  color: var(--teal); }
.isa-ls { background: rgba(218,178,75,0.12);  color: var(--gold); }
.isa-b  { background: rgba(110,175,220,0.10); color: var(--steel); }
.isa-s  { background: rgba(88,200,120,0.10);  color: var(--green); }
.isa-f  { background: rgba(110,175,220,0.12); color: var(--steel); }

.isa-pills { display: flex; flex-wrap: wrap; gap: 5px; }
.isa-pills span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(145,95,250,0.05);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 7px;
  color: var(--text-muted);
}
.isa-pills span.isa-m {
  background: rgba(72,195,168,0.08);
  border-color: rgba(72,195,168,0.18);
  color: var(--teal);
}
.isa-pills span.isa-f-pill {
  background: rgba(110,175,220,0.07);
  border-color: rgba(110,175,220,0.18);
  color: var(--steel);
}

.isa-legend {
  font-size: 0.8rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}
.legend-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }
.isa-m-dot  { background: var(--teal); }

/* =========================================================
   QUICK START
   ========================================================= */
.quickstart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.qs-option--embed { grid-column: 1 / -1; }

.qs-option {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: var(--transition);
}
.qs-option:hover {
  border-color: rgba(145,95,250,0.25);
}
.qs-badge {
  position: absolute;
  top: 16px; right: 16px;
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(145,95,250,0.10);
  border: 1px solid rgba(145,95,250,0.28);
  color: var(--accent-bright);
  border-radius: 100px;
  padding: 3px 10px;
}
.qs-option h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.qs-option > p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.65;
}
.qs-steps { display: flex; flex-direction: column; gap: 14px; }
.qs-step  { display: flex; gap: 14px; align-items: flex-start; }
.qs-num {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(145,95,250,0.10);
  border: 1px solid rgba(145,95,250,0.28);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-bright);
  flex-shrink: 0;
}
.qs-step > div {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}
.qs-step strong { color: var(--text); }

.qs-terminal {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.qs-term-line { display: flex; gap: 8px; }
.qs-prompt  { color: var(--accent-bright); user-select: none; }
.qs-cmd     { color: var(--text); }
.qs-term-out { color: var(--teal); margin-top: 4px; }

.embed-code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  white-space: pre;
}

/* =========================================================
   AUDIENCE
   ========================================================= */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 64px;
  align-items: center;
}
.audience-text .eyebrow { margin-bottom: 14px; }
.audience-text h2 {
  font-size: clamp(1.8rem, 2.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  line-height: 1.2;
}
.audience-text > p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
}
.audience-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.audience-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.al-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.audience-list strong { display: block; margin-bottom: 3px; }
.audience-list div {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Register panel card */
.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}
.ac-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(145,95,250,0.04);
  border-bottom: 1px solid var(--border);
}
.ac-dot { width: 10px; height: 10px; border-radius: 50%; }
.ac-red    { background: #d24844; }
.ac-yellow { background: #febc2e; }
.ac-green  { background: #28c840; }
.ac-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 6px;
}
.ac-body { padding: 4px 0; }
.ac-row {
  display: grid;
  grid-template-columns: 64px 1fr 1fr;
  gap: 8px;
  padding: 6px 16px;
  font-family: var(--font-mono);
  font-size: 0.77rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(145,95,250,0.05);
}
.ac-row--head {
  font-weight: 600;
  color: var(--text-dim);
  font-size: 0.7rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2px;
}
.ac-row--hi    { background: rgba(145,95,250,0.05); }
.ac-reg        { color: var(--teal); }
.ac-changed    { color: var(--accent-bright); }
.ac-ellipsis {
  text-align: center;
  padding: 8px;
  color: var(--text-dim);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
}
.ac-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}
.ac-status { color: var(--amber); }

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-dim);
  max-width: 320px;
  line-height: 1.6;
}
.footer-links { display: flex; gap: 48px; }
.fl-group h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 14px;
}
.fl-group ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.fl-group a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.fl-group a:hover { color: var(--accent-bright); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-dim);
}
.footer-arch {
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* =========================================================
   HAMBURGER / MOBILE NAV
   ========================================================= */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  position: fixed;
  top: 60px; left: 0; right: 0;
  background: rgba(24, 24, 32, 0.98);
  border-bottom: 1px solid var(--border-hi);
  padding: 12px 20px 24px;
  flex-direction: column;
  gap: 2px;
  backdrop-filter: blur(20px);
  z-index: 99;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  display: block;
  padding: 13px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.nav-mobile a:hover { color: var(--text); background: rgba(145,95,250,0.07); }
.nav-mobile .nav-mobile-cta {
  margin-top: 10px;
  border: 1px solid var(--border-hi);
  text-align: center;
  color: var(--text);
  font-weight: 600;
}
.nav-mobile .nav-mobile-cta:hover { border-color: var(--accent); color: var(--accent-bright); }

/* =========================================================
   RESPONSIVE — tablet / narrow desktop ≤ 960px
   ========================================================= */
@media (max-width: 960px) {
  .section { padding: 72px 0; }
  .section-header { margin-bottom: 48px; }

  /* Hero */
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 100px;
    gap: 48px;
  }
  .hero-content { display: flex; flex-direction: column; align-items: center; }
  .hero-stats   { justify-content: center; flex-wrap: wrap; gap: 20px; }
  .hero-visual  { width: 100%; }
  .tui-frame    { max-width: 420px; }
  .hero-desc    { text-align: center; }

  /* Features */
  .features-grid { grid-template-columns: 1fr 1fr; }
  .feature-card--large { grid-column: span 2; }

  /* Examples */
  .tab-panel.active { grid-template-columns: 1fr; }
  .code-pane { border-right: none; border-bottom: 1px solid var(--border); }

  /* Quick start */
  .quickstart-grid { grid-template-columns: 1fr; }

  /* Audience */
  .audience-grid { grid-template-columns: 1fr; gap: 40px; }

  /* Footer */
  .footer-top    { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* =========================================================
   RESPONSIVE — mobile ≤ 640px
   ========================================================= */
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section   { padding: 56px 0; }
  .section-header { margin-bottom: 36px; }

  /* Nav */
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger        { display: flex; }

  /* Hero */
  .hero        { padding: 90px 16px 48px; gap: 32px; }
  .hero-title  { font-size: clamp(1.9rem, 8vw, 2.6rem); }
  .hero-desc   { font-size: 0.97rem; }
  .hero-actions { justify-content: center; }
  .hero-stats  { gap: 14px; }
  .stat-div    { display: none; }
  .tui-frame   { font-size: 0.75rem; }

  /* Features */
  .features-grid       { grid-template-columns: 1fr; gap: 12px; }
  .feature-card--large { grid-column: span 1; }
  .feature-card        { padding: 22px 20px; }

  /* Examples — scrollable tab bar */
  .tab-buttons {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0;
  }
  .tab-buttons::-webkit-scrollbar { display: none; }
  .tab-btn { padding: 12px 14px; font-size: 0.78rem; white-space: nowrap; flex-shrink: 0; }
  .hlcode  { font-size: 0.73rem; padding: 14px 16px; line-height: 1.65; }
  .example-info { padding: 20px 16px; }

  /* ISA */
  .isa-grid { grid-template-columns: 1fr 1fr; gap: 10px; }

  /* Quick start */
  .qs-option   { padding: 24px 20px; }
  .qs-terminal { font-size: 0.78rem; padding: 14px 16px; }

  /* Audience card */
  .audience-card { width: 100%; }

  /* Footer */
  .footer       { padding: 48px 0 24px; }
  .footer-links { flex-direction: column; gap: 24px; }
}

/* =========================================================
   RESPONSIVE — small phone ≤ 420px
   ========================================================= */
@media (max-width: 420px) {
  .container { padding: 0 14px; }

  /* Hide TUI preview on very small screens */
  .hero-visual { display: none; }
  .hero { padding-top: 84px; gap: 24px; }

  /* Stack CTA buttons */
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; width: 100%; }

  /* ISA single column */
  .isa-grid { grid-template-columns: 1fr; }

  /* Tighter code view */
  .hlcode { font-size: 0.68rem; padding: 12px 14px; }

  /* Footer bottom stacks cleanly */
  .footer-bottom { font-size: 0.74rem; }
}