/* ============================================================
   PROMPTICORN — MULTI-MODE (Teams / Enterprise / Engineers)
   ============================================================ */

/* ── CSS Variables (default = startup/teams mode) ── */
:root {
  --accent:       #cc0000;
  --bg:           #050508;
  --bg-2:         #0a0a0f;
  --bg-3:         #0f0f16;
  --bg-card:      #0d0d14;
  --border:       #1a1a28;
  --border-glow:  #cc000044;
  --red:          #cc0000;
  --red-bright:   #ff2020;
  --red-dim:      #880000;
  --white:        #f0f0f5;
  --white-dim:    #8888a0;
  --white-muted:  #44445a;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --radius:       4px;
  --transition:   0.2s ease;
}

/* ── Mode overrides ── */
[data-mode="startup"] {
  --accent: #cc0000;
  --bg: #050508;
  --font-body: 'Inter', system-ui, sans-serif;
}
[data-mode="enterprise"] {
  --accent: #cc0000;
  --bg: #000000;
  --bg-2: #080808;
  --bg-3: #0d0d0d;
  --bg-card: #0a0a0a;
  --border: #1a1a1a;
  --font-body: 'Space Grotesk', system-ui, sans-serif;
}
[data-mode="engineer"] {
  --accent: #00ff88;
  --bg: #0d0d1a;
  --bg-2: #111120;
  --bg-3: #141425;
  --bg-card: #111120;
  --border: #1e1e36;
  --border-glow: #00ff8844;
  --red: #00ff88;
  --red-bright: #00ffaa;
  --red-dim: #008844;
  --font-body: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ── Accessible colours overlay ── */
[data-accessible-colors] {
  --accent:       #0077bb;
  --red:          #0077bb;
  --red-bright:   #0099dd;
  --red-dim:      #005588;
  --border-glow:  #0077bb44;
}
[data-accessible-colors][data-mode="engineer"] {
  --accent:       #ee7733;
  --red:          #ee7733;
  --red-bright:   #ff9944;
  --red-dim:      #aa5500;
  --border-glow:  #ee773344;
}

/* ── Accessible colours toggle button ── */
.accessible-colors-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--white-muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  margin-left: 1rem;
  flex-shrink: 0;
}
.accessible-colors-btn:hover { border-color: var(--white-muted); color: var(--white); }
.accessible-colors-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,119,187,0.08);
}
[data-mode="engineer"] .accessible-colors-btn.active {
  background: rgba(238,119,51,0.08);
}
.accessible-colors-btn-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

/* ── Transitions ── */
.mode-transition { animation: modeFade 0.25s ease; }
@keyframes modeFade {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Content mode switching ── */
[data-show-mode] { display: none; }
[data-mode="startup"]    [data-show-mode="startup"]    { display: block; }
[data-mode="enterprise"] [data-show-mode="enterprise"] { display: block; }
[data-mode="engineer"]   [data-show-mode="engineer"]   { display: block; }

/* Hero wrapper divs must mirror .hero-content's flex layout so children center correctly */
[data-mode="startup"]    .hero-content [data-show-mode="startup"],
[data-mode="enterprise"] .hero-content [data-show-mode="enterprise"],
[data-mode="engineer"]   .hero-content [data-show-mode="engineer"] {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
  width: 100%;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; scroll-padding-top: 120px; }
body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease;
}
a { color: var(--red-bright); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--white); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4, h5 {
  font-family: 'Space Grotesk', var(--font-body);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
[data-mode="engineer"] h1,
[data-mode="engineer"] h2,
[data-mode="engineer"] h3,
[data-mode="engineer"] h4,
[data-mode="engineer"] h5 {
  font-family: 'JetBrains Mono', monospace;
}
h1 { font-size: clamp(2.4rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.1rem; }
p { color: var(--white-dim); }

/* ── Utilities ── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 2rem; }
.section { padding: 7rem 0; }
.section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section-title { margin-bottom: 1.5rem; }
.section-title span { color: var(--accent); }
.section-desc { color: var(--white-dim); max-width: 600px; font-size: 1.05rem; margin-bottom: 4rem; }

.tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.25em 0.75em;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--white-muted);
  background: var(--bg-2);
}
.tag.red { border-color: var(--red-dim); color: var(--red-bright); background: #1a000010; }
[data-mode="engineer"] .tag.red { background: #00ff8810; }

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 30px rgba(204,0,0,0.25);
}
[data-mode="engineer"] .btn-primary {
  color: #0d0d1a;
  box-shadow: 0 0 30px rgba(0,255,136,0.25);
}
.btn-primary:hover {
  filter: brightness(1.15);
  color: #fff;
}
[data-mode="engineer"] .btn-primary:hover { color: #0d0d1a; }
.btn-ghost {
  background: transparent;
  color: var(--white-dim);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--white-muted); color: var(--white); }

/* ── Navigation ── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
[data-mode="enterprise"] #nav { background: rgba(0, 0, 0, 0.85); }
[data-mode="engineer"] #nav { background: rgba(13, 13, 26, 0.85); }
#nav.scrolled { background: rgba(5, 5, 8, 0.97); }
[data-mode="enterprise"] #nav.scrolled { background: rgba(0, 0, 0, 0.97); }
[data-mode="engineer"] #nav.scrolled { background: rgba(13, 13, 26, 0.97); }

.nav-inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 1rem;
}
.nav-links { margin-left: auto; }
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo img {
  height: 34px;
  width: auto;
  filter: drop-shadow(0 0 8px #cc000060);
}
[data-mode="engineer"] .nav-logo img {
  filter: drop-shadow(0 0 8px #00ff8860);
}
.nav-logo-text {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--white);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  /* don't flex-grow — keeps right edge stable regardless of visible link count */
}
.nav-links a {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white-muted);
  text-decoration: none;
  transition: color var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--white); }
.nav-links a.active { color: var(--red-bright); }
.nav-cta {
  padding-left: 1.25rem;
  border-left: 1px solid var(--border);
  color: var(--white-muted) !important;
}

/* ── Mode Bar (below navbar) ── */
#mode-bar {
  position: sticky;
  top: 64px;
  z-index: 99;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: center;
  padding: 8px 0;
}
.mode-bar-inner {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 3px;
  gap: 0;
}
.mode-btn {
  padding: 0.38rem 1.1rem;
  background: transparent;
  border: none;
  border-radius: 100px;
  color: var(--white-muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  line-height: 1;
}
.mode-btn:hover { color: var(--white); }
.mode-btn.active {
  background: var(--accent);
  color: #fff;
}
[data-mode="engineer"] .mode-btn.active { color: #0d0d1a; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white-dim);
  transition: all 0.25s;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  gap: 1rem;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white-dim);
}
.nav-mobile .mode-switcher { align-self: flex-start; }

/* ── Hero ── */
#hero {
  padding: 11rem 0 7rem;
  position: relative;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 100%);
}
.hero-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(204,0,0,0.09) 0%, transparent 70%);
  pointer-events: none;
}
[data-mode="engineer"] .hero-glow {
  background: radial-gradient(ellipse, rgba(0,255,136,0.09) 0%, transparent 70%);
}
.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
  width: 100%;
}
.hero-logo {
  display: block;
  width: 180px;
  height: auto;
  margin: 0 auto 2rem;
  filter: drop-shadow(0 0 12px rgba(204, 0, 0, 0.4));
}
[data-mode="engineer"] .hero-logo {
  filter: drop-shadow(0 0 12px rgba(0, 255, 136, 0.4));
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  width: 100%;
}
.hero-eyebrow::before,
.hero-eyebrow::after {
  content: '';
  display: block;
  height: 1px;
  width: 40px;
  background: var(--red-dim);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--white-dim);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.4em 1.1em;
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}
.hero-title { max-width: 900px; }
.hero-title em {
  font-style: normal;
  color: var(--accent);
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--white-dim);
  max-width: 620px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}
.hero-stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  width: 100%;
  max-width: 700px;
}
.hero-stat-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.04em;
}
.hero-stat-num span { color: var(--accent); }
.hero-stat-label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white-muted);
  margin-top: 0.25rem;
}

/* ── Gradient text (engineer mode) ── */
.gradient-text { color: var(--accent); }
[data-mode="engineer"] .gradient-text {
  background: linear-gradient(135deg, #00ff88, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Engineer hero callouts ── */
.hero-callouts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 3rem;
  width: 100%;
}
.hero-callout {
  background: var(--bg-card);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: background var(--transition);
}
.hero-callout:hover { background: var(--bg-3); }
.hero-callout-icon { font-size: 1.4rem; margin-bottom: 0.25rem; }
.hero-callout h4 { font-size: 0.9rem; font-weight: 700; color: var(--white); }
.hero-callout p { font-size: 0.8rem; color: var(--white-muted); line-height: 1.5; }

/* ── Install strip (engineer mode) ── */
.hero-install-strip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1.25rem;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  max-width: 420px;
}
.install-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white-muted);
  white-space: nowrap;
}
.install-cmd { color: var(--accent); }
.hero-install-strip .copy-btn { margin-left: auto; }

/* ── Features ── */
#features { background: var(--bg-2); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.feature-card {
  background: var(--bg-card);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: background var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: transparent;
  transition: background var(--transition);
}
.feature-card:hover { background: var(--bg-3); }
.feature-card:hover::before { background: var(--accent); }
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: rgba(204,0,0,0.06);
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
}
[data-mode="engineer"] .feature-icon { background: rgba(0,255,136,0.06); }
.feature-card h4 { font-weight: 700; font-size: 1rem; color: var(--white); }
.feature-card p { font-size: 0.875rem; color: var(--white-muted); line-height: 1.6; }

/* ── Scenario Cards (startup) ── */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.scenario-card {
  background: var(--bg-card);
  border: 1px solid #2a2a3a;
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color var(--transition), transform var(--transition);
}
.scenario-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.scenario-header { margin-bottom: 1rem; }
.scenario-label {
  display: inline-block;
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent);
  background: rgba(204,0,0,0.08);
  border: 1px solid rgba(204,0,0,0.25);
  border-radius: 2px;
  padding: 0.2em 0.6em;
  margin-bottom: 0.75rem;
}
.scenario-card h3 { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 0.75rem; }
.scenario-card p { color: #9090a8; font-size: 0.95rem; line-height: 1.75; }

/* ── Before/After Comparison (startup) ── */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 1rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid #2a2a3a;
}
.compare-col { overflow: hidden; }
.compare-bad { background: #0e0505; border-right: 1px solid #2a2a3a; }
.compare-good { background: #050e07; }
.compare-col-header { padding: 1rem 1.5rem; border-bottom: 1px solid #2a2a3a; display: flex; align-items: center; gap: 0.6rem; }
.compare-bad .compare-col-header { background: rgba(26,0,0,0.1); }
.compare-good .compare-col-header { background: rgba(0,26,5,0.1); }
.compare-col-label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.compare-col-label--bad { color: #e05555; }
.compare-col-label--good { color: #44cc77; }
.compare-list { padding: 1.25rem 1.5rem 1.75rem; display: flex; flex-direction: column; gap: 0; list-style: none; margin: 0; }
.compare-item { display: flex; align-items: flex-start; gap: 0.75rem; font-size: 0.9rem; line-height: 1.55; padding: 0.65rem 0; border-bottom: 1px solid rgba(255,255,255,0.03); }
.compare-item:last-child { border-bottom: none; }
.compare-item--bad { color: #a09090; }
.compare-item--good { color: #b0d4bb; }
.compare-item::before { flex-shrink: 0; font-size: 1rem; font-weight: 700; margin-top: 0.05em; width: 1.1em; text-align: center; }
.compare-item--bad::before { content: "✗"; color: #e05555; }
.compare-item--good::before { content: "✓"; color: #44cc77; }

/* ── How It Works ── */
#how-it-works { background: var(--bg); }
.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 750px;
  margin: 0 auto;
}
.flow-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border);
}
.flow-step:last-child { border-bottom: none; }
.flow-step-num {
  width: 52px; height: 52px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
}
.flow-step-content h4 { font-size: 1.05rem; font-weight: 700; color: var(--white); margin-bottom: 0.5rem; }
.flow-step-content p { font-size: 0.9rem; color: var(--white-muted); line-height: 1.6; }

/* Callout box */
.callout-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
}
.callout-box-title {
  font-family: 'Space Grotesk', var(--font-body);
  font-weight: 700; font-size: 0.95rem;
  color: var(--white);
  margin-bottom: 0.75rem;
}
.callout-steps { list-style: decimal; padding-left: 1.25rem; display: flex; flex-direction: column; gap: 0.4rem; color: var(--white-dim); font-size: 0.95rem; }

/* Architecture diagrams */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}
.arch-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.arch-card-header { padding: 1rem 1.5rem; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.arch-card-header h4 { font-size: 0.85rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--white-dim); }
.arch-card-body { padding: 1.5rem; min-height: 280px; display: flex; align-items: center; justify-content: center; }
#d3-graph { width: 100%; height: 300px; }
.mermaid-wrap { width: 100%; overflow-x: auto; }

/* ── Personas ── */
.persona-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.persona-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition);
}
.persona-card:hover { border-color: var(--red-dim); transform: translateY(-2px); }
.persona-icon { font-size: 1.75rem; margin-bottom: 1rem; }
.persona-card h4 { font-size: 1rem; color: var(--white); margin-bottom: 0.5rem; }
.persona-card p { font-size: 0.88rem; color: var(--white-dim); line-height: 1.65; margin-bottom: 1rem; }
.persona-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: rgba(204,0,0,0.08);
  border: 1px solid var(--red-dim);
  border-radius: var(--radius);
  padding: 0.25em 0.65em;
  display: inline-block;
}
[data-mode="engineer"] .persona-tag { background: rgba(0,255,136,0.08); }

/* ── Tools ── */
.tools-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.tool-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.75rem; transition: border-color var(--transition); }
.tool-card:hover { border-color: var(--red-dim); }
.tool-card-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 0.85rem; }
.tool-name { font-family: 'Space Grotesk', var(--font-body); font-weight: 700; font-size: 1.05rem; color: var(--white); }
.tool-desc { font-size: 0.9rem; color: var(--white-dim); line-height: 1.6; margin-bottom: 1rem; }
.tool-output { font-size: 0.85rem; color: var(--white-muted); line-height: 1.6; padding-top: 0.85rem; border-top: 1px solid var(--border); }
.tool-output-label { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 0.3rem; }

/* ── Builders Tabs ── */
#builders { background: var(--bg-2); }
.builders-nav {
  display: flex; gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.builder-tab {
  flex: 1; min-width: 120px;
  padding: 0.9rem 1rem;
  background: var(--bg-card);
  border: none; border-right: 1px solid var(--border);
  color: var(--white-muted);
  font-family: var(--font-body);
  font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  cursor: pointer; transition: all var(--transition);
}
.builder-tab:last-child { border-right: none; }
.builder-tab:hover { background: var(--bg-3); color: var(--white-dim); }
.builder-tab.active { background: var(--bg-3); color: var(--red-bright); border-bottom: 2px solid var(--accent); }
.builder-panel { display: none; }
.builder-panel.active { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.builder-info { padding: 2rem 0; }
.builder-badge { display: inline-flex; align-items: center; gap: 0.5rem; margin-bottom: 1.25rem; }
.builder-badge-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
  animation: pulse-dot 2s infinite;
}
.builder-info h3 { margin-bottom: 1rem; }
.builder-info p { font-size: 0.95rem; margin-bottom: 1.25rem; line-height: 1.7; }
.builder-specs { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 1.5rem; }
.builder-spec { display: flex; align-items: flex-start; gap: 0.75rem; font-size: 0.875rem; color: var(--white-dim); }
.builder-spec::before { content: '→'; color: var(--red-dim); flex-shrink: 0; margin-top: 0.05em; }

/* ── Code Blocks ── */
.code-wrap {
  position: relative;
  background: #020204;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
[data-mode="engineer"] .code-wrap { background: #060614; }
.code-header { display: flex; align-items: center; justify-content: space-between; padding: 0.6rem 1rem; background: #0a0a12; border-bottom: 1px solid var(--border); }
[data-mode="engineer"] .code-header { background: #0a0a1e; }
.code-lang { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--white-muted); }
.copy-btn {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  background: none; border: 1px solid var(--border);
  color: var(--white-muted); padding: 0.25em 0.75em;
  border-radius: var(--radius); cursor: pointer; transition: all var(--transition); font-family: var(--font-body);
}
.copy-btn:hover { border-color: var(--white-muted); color: var(--white); }
.copy-btn.copied { border-color: var(--red-dim); color: var(--accent); }
pre[class*="language-"] { margin: 0 !important; padding: 1.25rem !important; background: transparent !important; font-size: 0.83rem !important; line-height: 1.65 !important; overflow-x: auto; font-family: var(--font-mono) !important; }
code[class*="language-"] { font-family: var(--font-mono) !important; font-size: inherit !important; }

/* ── Getting Started ── */
#getting-started { background: var(--bg); }
.install-tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 0; }
.install-tab { padding: 0.6rem 1.25rem; background: none; border: none; border-bottom: 2px solid transparent; color: var(--white-muted); font-family: var(--font-body); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; cursor: pointer; margin-bottom: -1px; transition: all var(--transition); }
.install-tab.active { color: var(--red-bright); border-bottom-color: var(--accent); }
.install-panel { display: none; }
.install-panel.active { display: block; }

.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 3rem; }
.step-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.75rem; }
.step-num { font-family: 'Space Grotesk', sans-serif; font-size: 2.5rem; font-weight: 700; color: var(--border); line-height: 1; margin-bottom: 1rem; }
.step-card h4 { color: var(--white); margin-bottom: 0.5rem; }
.step-card p { font-size: 0.875rem; color: var(--white-muted); }

.cli-table { width: 100%; border-collapse: collapse; margin-top: 2rem; }
.cli-table th { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--white-muted); padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border); }
.cli-table td { padding: 0.85rem 1rem; border-bottom: 1px solid var(--border); font-size: 0.875rem; vertical-align: top; }
.cli-table tr:last-child td { border-bottom: none; }
.cli-table tr:hover td { background: var(--bg-2); }
.cli-cmd { font-family: var(--font-mono); font-size: 0.82rem; color: var(--accent); white-space: nowrap; }
.cli-desc { color: var(--white-muted); }

/* ── Testimonials ── */
.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.testimonial-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 2rem; display: flex; flex-direction: column; gap: 1.5rem; }
.testimonial-quote { font-size: 1rem; color: var(--white-dim); line-height: 1.7; font-style: italic; flex: 1; }
.testimonial-attribution { border-top: 1px solid var(--border); padding-top: 1rem; }
.testimonial-name { font-weight: 600; font-size: 0.9rem; color: var(--white); }
.testimonial-role { font-size: 0.8rem; color: var(--white-muted); margin-top: 0.2rem; }

/* ── CTA Section ── */
.cta-section { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%); }
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-eyebrow { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
.cta-headline { font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: 1rem; line-height: 1.1; }
.cta-headline span { color: var(--accent); }
.cta-sub { font-size: 1.1rem; color: var(--white-dim); margin-bottom: 2.5rem; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── Docs Hub ── */
#docs { background: var(--bg); }
.docs-search-wrap { position: relative; max-width: 500px; margin-bottom: 3rem; }
.docs-search { width: 100%; padding: 0.875rem 1rem 0.875rem 3rem; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); color: var(--white); font-family: var(--font-body); font-size: 0.9rem; outline: none; transition: border-color var(--transition); }
.docs-search::placeholder { color: var(--white-muted); }
.docs-search:focus { border-color: var(--red-dim); }
.docs-search-icon { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); color: var(--white-muted); pointer-events: none; }
.docs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.doc-category { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.75rem; transition: border-color var(--transition); }
.doc-category:hover { border-color: var(--white-muted); }
.doc-category-title { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.25rem; }
.doc-links { display: flex; flex-direction: column; gap: 0.6rem; }
.doc-link { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; color: var(--white-muted); transition: color var(--transition); cursor: pointer; }
.doc-link:hover { color: var(--white); }
.doc-link::before { content: '→'; color: var(--red-dim); font-size: 0.75rem; }
.doc-link.hidden { display: none; }

/* ── Footer ── */
#footer { background: var(--bg-2); border-top: 1px solid var(--border); padding: 4rem 0 2.5rem; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; padding-bottom: 3rem; border-bottom: 1px solid var(--border); margin-bottom: 2rem; }
.footer-brand .nav-logo { margin-bottom: 1rem; }
.footer-brand p { font-size: 0.875rem; color: var(--white-muted); max-width: 280px; line-height: 1.7; }
.footer-col h5 { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--white-muted); margin-bottom: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col ul li a { font-size: 0.875rem; color: var(--white-muted); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--white); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-copy { font-size: 0.8rem; color: var(--white-muted); }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 0.8rem; color: var(--white-muted); }
.footer-links a:hover { color: var(--white); }

/* ── Scroll Reveal ── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ── Mermaid ── */
.mermaid { background: transparent !important; }
.mermaid svg { max-width: 100%; height: auto; }

/* ── D3 ── */
.d3-node circle { stroke-width: 2; cursor: pointer; transition: r 0.2s; }
.d3-node text { fill: var(--white-dim); font-size: 11px; pointer-events: none; }
.d3-link { stroke: var(--border); stroke-opacity: 0.6; }

/* ── Responsive ── */
@media (max-width: 1100px) {
  .nav-links { gap: 1.2rem; }
  .nav-links a { font-size: 0.75rem; }
  .mode-btn { padding: 0.28rem 0.6rem; font-size: 0.66rem; }
}
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-callouts { grid-template-columns: repeat(2, 1fr); }
  .arch-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .compare-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.5rem; }
  .features-grid { grid-template-columns: 1fr; }
  .builder-panel.active { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .docs-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-callouts { grid-template-columns: 1fr; }
  .builders-nav { flex-direction: column; }
  .builder-tab { border-right: none; border-bottom: 1px solid var(--border); }
}
@media (max-width: 480px) {
  .section { padding: 5rem 0; }
  h1 { font-size: 2rem; }
  .container { padding: 0 1.25rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .mode-btn { padding: 0.28rem 0.5rem; font-size: 0.62rem; }
}