/* ═══════════════════════════════════════════════════════
   ChronoForge Pulse — Main Stylesheet
   ═══════════════════════════════════════════════════════ */

/* ─── VARIABLES & RESET ─── */
:root {
  --bg-primary: #06080d;
  --bg-secondary: #0a0e18;
  --bg-card: rgba(12, 17, 30, 0.7);
  --bg-card-hover: rgba(18, 25, 45, 0.8);
  --surface: #0f1420;
  --border: rgba(56, 189, 248, 0.08);
  --border-hover: rgba(56, 189, 248, 0.2);
  --text-primary: #e8ecf4;
  --text-secondary: #8491a7;
  --text-muted: #4d5a72;
  --accent: #38bdf8;
  --accent-bright: #7dd3fc;
  --accent-dim: #0c4a6e;
  --pulse: #06b6d4;
  --pulse-glow: rgba(6, 182, 212, 0.15);
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --gradient-hero: linear-gradient(135deg, #06080d 0%, #0c1220 40%, #0a1628 100%);
  --glass: rgba(12, 18, 32, 0.6);
  --glass-border: rgba(56, 189, 248, 0.1);
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-body: 'DM Sans', sans-serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --particle-color: 56, 189, 248;
  --chart-glow: rgba(56, 189, 248, 0.18);
  --code-bg: rgba(0,0,0,0.3);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.4);
  --nav-scrolled: rgba(6, 8, 13, 0.88);
  --invert: 0;
}

/* ─── LIGHT MODE ─── */
[data-theme="light"] {
  --bg-primary: #f8fafb;
  --bg-secondary: #f0f4f7;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --surface: #ffffff;
  --border: rgba(15, 60, 100, 0.1);
  --border-hover: rgba(15, 60, 100, 0.2);
  --text-primary: #0f1a2e;
  --text-secondary: #4a5b76;
  --text-muted: #8494ab;
  --accent: #0284c7;
  --accent-bright: #0369a1;
  --accent-dim: #bae6fd;
  --pulse: #0891b2;
  --pulse-glow: rgba(8, 145, 178, 0.1);
  --success: #059669;
  --warning: #d97706;
  --danger: #dc2626;
  --gradient-hero: linear-gradient(135deg, #f8fafb 0%, #eef3f8 40%, #e8f0f8 100%);
  --glass: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(15, 60, 100, 0.1);
  --particle-color: 2, 132, 199;
  --chart-glow: rgba(2, 132, 199, 0.15);
  --code-bg: rgba(15, 26, 46, 0.04);
  --shadow-lg: 0 20px 60px rgba(15, 60, 100, 0.1);
  --nav-scrolled: rgba(248, 250, 251, 0.88);
  --invert: 1;
}

[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(15, 60, 100, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 60, 100, 0.04) 1px, transparent 1px);
}

[data-theme="light"] ::selection {
  background: rgba(2, 132, 199, 0.2);
  color: #0f1a2e;
}

[data-theme="light"] .nav.scrolled {
  background: var(--nav-scrolled);
  box-shadow: 0 1px 12px rgba(15, 60, 100, 0.06);
}

[data-theme="light"] .nav-cta {
  background: var(--accent);
  color: #fff !important;
}

[data-theme="light"] .nav-cta:hover {
  background: var(--accent-bright);
  color: #fff !important;
  box-shadow: 0 4px 20px rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .btn-primary {
  color: #fff;
}

[data-theme="light"] .btn-primary:hover {
  box-shadow: 0 8px 30px rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .hero-chart-container {
  box-shadow: 0 8px 40px rgba(15, 60, 100, 0.08);
}

[data-theme="light"] .feature-card:hover {
  box-shadow: 0 8px 30px rgba(15, 60, 100, 0.06);
}

[data-theme="light"] .feature-card.featured .feature-visual {
  background: var(--code-bg);
  border-color: var(--border);
}

[data-theme="light"] .api-demo {
  background: #1a2236;
  border-color: rgba(56, 189, 248, 0.1);
}

[data-theme="light"] .api-demo-bar {
  background: #141c2e;
}

[data-theme="light"] .api-demo-body {
  color: #8491a7;
}

[data-theme="light"] .logos-row {
  opacity: 0.4;
}

[data-theme="light"] .logos-row:hover {
  opacity: 0.6;
}

[data-theme="light"] .logo-item {
  color: #4a5b76;
}

[data-theme="light"] .pricing-card.popular {
  box-shadow: 0 8px 40px rgba(2, 132, 199, 0.1);
}

[data-theme="light"] .pricing-card.popular .pricing-btn {
  color: #fff;
}

[data-theme="light"] .chat-panel {
  box-shadow: -20px 0 60px rgba(15, 60, 100, 0.15);
}

[data-theme="light"] .chat-msg.user .chat-msg-bubble {
  background: var(--accent);
  color: #fff;
}

[data-theme="light"] .auth-modal {
  box-shadow: 0 30px 80px rgba(15, 60, 100, 0.15), 0 0 0 1px rgba(15, 60, 100, 0.08);
}

[data-theme="light"] .auth-submit {
  color: #fff;
}

[data-theme="light"] .auth-submit .spinner {
  border-color: rgba(255,255,255,0.3);
  border-top-color: #fff;
}

[data-theme="light"] .nav-logo-icon svg,
[data-theme="light"] .chat-panel-title-icon svg,
[data-theme="light"] .auth-logo svg {
  stroke: #fff;
}

[data-theme="light"] .nav-user-avatar {
  color: #fff;
}

[data-theme="light"] .ensemble-badge {
  background: rgba(5, 150, 105, 0.06);
  border-color: rgba(5, 150, 105, 0.2);
}

[data-theme="light"] .pipeline-num {
  color: var(--accent-dim);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  letter-spacing: -0.01em;
}

::selection {
  background: rgba(56, 189, 248, 0.3);
  color: #fff;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--accent-bright); }

/* ─── GLOBAL BACKGROUND GRID ─── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}


/* ═══════════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 2rem;
  transition: all 0.4s var(--ease-out-expo);
}

.nav.scrolled {
  background: rgba(6, 8, 13, 0.88);
  backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--pulse) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.nav-logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.2));
}

.nav-logo-icon svg { position: relative; z-index: 1; }
.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease-out-expo);
}

.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--accent); }
.nav-links a.active::after { width: 100%; }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 8px;
  background: var(--accent);
  color: #06080d !important;
  font-family: var(--font-mono) !important;
  font-weight: 600 !important;
  font-size: 0.7rem !important;
  text-transform: uppercase !important;
  letter-spacing: 0.04em;
  transition: all 0.25s var(--ease-out-expo);
  border: none;
  cursor: pointer;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.3);
  color: #06080d !important;
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}


/* ═══════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 110px 2rem 80px;
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 900px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg-primary), transparent);
  pointer-events: none;
  z-index: 2;
}

.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 3;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px 5px 8px;
  border-radius: 100px;
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.2);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  animation: fadeInUp 0.8s var(--ease-out-expo) both;
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pulse);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.4); }
  50% { box-shadow: 0 0 0 6px rgba(6, 182, 212, 0); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  animation: fadeInUp 0.8s 0.1s var(--ease-out-expo) both;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, #a78bfa 50%, var(--pulse) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: 2rem;
  letter-spacing: -0.005em;
  animation: fadeInUp 0.8s 0.2s var(--ease-out-expo) both;
}

.hero-actions {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s 0.3s var(--ease-out-expo) both;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--pulse) 100%);
  color: #06080d;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: -0.01em;
  border: none;
  cursor: pointer;
  transition: all 0.3s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.15));
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(56, 189, 248, 0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.88rem;
  letter-spacing: -0.01em;
  border: 1px solid var(--border-hover);
  cursor: pointer;
  transition: all 0.3s var(--ease-out-expo);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.05);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.5rem;
  animation: fadeInUp 0.8s 0.4s var(--ease-out-expo) both;
}

.hero-stat-value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.02em;
}

.hero-stat-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-top: 4px;
}


/* ─── HERO CHART ─── */
.hero-visual {
  position: relative;
  animation: fadeInUp 0.8s 0.3s var(--ease-out-expo) both;
}

.hero-chart-container {
  position: relative;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 1.25rem;
  backdrop-filter: blur(10px);
  overflow: hidden;
}

.hero-chart-container::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.chart-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.chart-live-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--success);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.chart-live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 1.5s ease-in-out infinite;
}

.hero-canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 8px;
  overflow: hidden;
}

#heroChart {
  width: 100%;
  height: 100%;
  display: block;
}

.chart-metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 0.85rem;
}

.chart-metric {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem;
  text-align: center;
}

.chart-metric-val {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.chart-metric-val.up { color: var(--success); }
.chart-metric-val.warn { color: var(--warning); }

.chart-metric-lbl {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-top: 2px;
}


/* ═══════════════════════════════════════════════════════
   LOGOS / SOCIAL PROOF
   ═══════════════════════════════════════════════════════ */
.logos-section {
  position: relative;
  z-index: 3;
  padding: 2.5rem 2rem 3.5rem;
  text-align: center;
}

.logos-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.logos-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
  max-width: 900px;
  margin: 0 auto;
  opacity: 0.3;
  filter: grayscale(1);
  transition: all 0.4s;
}

.logos-row:hover { opacity: 0.5; filter: grayscale(0.5); }

.logo-item {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
}


/* ═══════════════════════════════════════════════════════
   SECTION COMMON
   ═══════════════════════════════════════════════════════ */
.section {
  padding: 5.5rem 2rem;
  position: relative;
  z-index: 3;
}

.section-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.65;
  letter-spacing: -0.005em;
}


/* ═══════════════════════════════════════════════════════
   FEATURES GRID
   ═══════════════════════════════════════════════════════ */
.features-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.features-header .section-desc { margin: 0.5rem auto 0; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

.feature-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.07);
  border: 1px solid rgba(56, 189, 248, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.1rem;
  color: var(--accent);
}

.feature-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  letter-spacing: -0.015em;
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.feature-card.featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  align-items: center;
}

.feature-card.featured .feature-visual {
  background: rgba(0,0,0,0.3);
  border-radius: 10px;
  padding: 1.1rem;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  line-height: 1.85;
  color: var(--text-muted);
  overflow: hidden;
  white-space: pre;
}

.feature-visual .kw { color: var(--accent); }
.feature-visual .fn { color: #a78bfa; }
.feature-visual .str { color: var(--success); }
.feature-visual .num { color: var(--warning); }
.feature-visual .cmt { color: var(--text-muted); opacity: 0.5; }


/* ═══════════════════════════════════════════════════════
   PIPELINE
   ═══════════════════════════════════════════════════════ */
.pipeline-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pipeline-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.pipeline-header .section-desc { margin: 0.5rem auto 0; }

.pipeline-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.pipeline-step {
  text-align: center;
  padding: 1.75rem 1.25rem;
  position: relative;
}

.pipeline-step:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 60%;
  background: linear-gradient(to bottom, transparent, var(--border-hover), transparent);
}

.pipeline-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-dim);
  line-height: 1;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.pipeline-step-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.pipeline-step-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
}


/* ═══════════════════════════════════════════════════════
   API SECTION
   ═══════════════════════════════════════════════════════ */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
  align-items: start;
  margin-top: 2.5rem;
}

.api-demo {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}

.api-demo-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: rgba(0,0,0,0.3);
  border-bottom: 1px solid var(--border);
}

.api-dot { width: 10px; height: 10px; border-radius: 50%; }
.api-dot.r { background: #f87171; }
.api-dot.y { background: #fbbf24; }
.api-dot.g { background: #34d399; }

.api-demo-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-left: 6px;
}

.api-demo-body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.67rem;
  line-height: 1.9;
  color: var(--text-muted);
  overflow-x: auto;
  white-space: pre;
}

.api-demo-body .method { color: #34d399; font-weight: 600; }
.api-demo-body .url { color: var(--accent); }
.api-demo-body .key { color: #a78bfa; }
.api-demo-body .str { color: #fbbf24; }
.api-demo-body .num { color: #f87171; }
.api-demo-body .cmt { color: var(--text-muted); opacity: 0.4; }

.api-endpoints {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.api-endpoint {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 9px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  transition: all 0.3s;
}

.api-endpoint:hover {
  border-color: var(--border-hover);
  background: rgba(56, 189, 248, 0.03);
}

.api-method {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
  min-width: 44px;
  text-align: center;
}

.api-method.post { background: rgba(52, 211, 153, 0.1); color: var(--success); }
.api-method.get { background: rgba(56, 189, 248, 0.1); color: var(--accent); }

.api-path {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-primary);
}

.api-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-left: auto;
}


/* ═══════════════════════════════════════════════════════
   MODELS / ENSEMBLE
   ═══════════════════════════════════════════════════════ */
.models-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
  margin-top: 2.5rem;
}

.model-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.4s var(--ease-out-expo);
}

.model-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.model-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
  letter-spacing: -0.01em;
}

.model-type {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.85rem;
}

.model-accuracy {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--success), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 3px;
  letter-spacing: -0.02em;
}

.model-accuracy-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.model-bar {
  height: 3px;
  background: rgba(255,255,255,0.04);
  border-radius: 2px;
  margin-top: 0.85rem;
  overflow: hidden;
}

.model-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--success));
  transition: width 1.5s var(--ease-out-expo);
  width: 0;
}

.model-bar-fill.animate { width: var(--fill); }

.ensemble-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  border-radius: 100px;
  background: rgba(52, 211, 153, 0.06);
  border: 1px solid rgba(52, 211, 153, 0.2);
}

.ensemble-badge-val {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: #34d399;
  letter-spacing: -0.01em;
}

.ensemble-badge-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-left: 6px;
}


/* ═══════════════════════════════════════════════════════
   SUPPLY CHAIN FLOW
   ═══════════════════════════════════════════════════════ */
.sc-flow {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-bottom: 3rem;
}

.sc-flow-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem 1.5rem;
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.sc-flow-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

.sc-flow-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.sc-flow-card:hover::before { opacity: 1; }

.sc-flow-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.15);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.sc-flow-card:nth-child(3) .sc-flow-num {
  color: #a78bfa;
  background: rgba(167, 139, 250, 0.08);
  border-color: rgba(167, 139, 250, 0.15);
}

.sc-flow-card:nth-child(5) .sc-flow-num {
  color: #34d399;
  background: rgba(52, 211, 153, 0.08);
  border-color: rgba(52, 211, 153, 0.15);
}

.sc-flow-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  letter-spacing: -0.015em;
}

.sc-flow-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.sc-flow-details {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.sc-flow-tag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  padding: 3px 9px;
  border-radius: 5px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  letter-spacing: 0.02em;
  transition: border-color 0.2s, color 0.2s;
}

.sc-flow-card:hover .sc-flow-tag {
  border-color: var(--border-hover);
  color: var(--text-secondary);
}

.sc-flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  flex-shrink: 0;
  width: 48px;
  opacity: 0.4;
}

.sc-bottom-visual {
  max-width: 600px;
  margin: 0 auto;
}

.sc-visual-box {
  background: rgba(0,0,0,0.3);
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.sc-visual-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sc-visual-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px rgba(52, 211, 153, 0.4);
}

.sc-visual-body {
  padding: 1.1rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.85;
  color: var(--text-muted);
  white-space: pre;
}

.sc-visual-body .key { color: #a78bfa; }
.sc-visual-body .num { color: var(--warning); }
.sc-visual-body .str { color: var(--success); }
.sc-visual-body .cmt { color: var(--text-muted); opacity: 0.5; }

[data-theme="light"] .sc-visual-box { background: rgba(0,0,0,0.03); }

@media (max-width: 768px) {
  .sc-flow {
    flex-direction: column;
    gap: 1rem;
  }
  .sc-flow-arrow {
    transform: rotate(90deg);
    width: auto;
    height: 32px;
  }
}


/* ═══════════════════════════════════════════════════════
   PRICING
   ═══════════════════════════════════════════════════════ */
.pricing-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.pricing-header .section-desc { margin: 0.5rem auto 0; }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  max-width: 1020px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2.25rem 1.75rem;
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
}

.pricing-card.popular {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.03);
}

.pricing-card.popular::before {
  content: 'Most Popular';
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #06080d;
  background: var(--accent);
  padding: 3px 12px;
  border-radius: 100px;
}

.pricing-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
}

.pricing-tier {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
  letter-spacing: -0.01em;
}

.pricing-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.pricing-amount {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.4rem;
  color: var(--text-primary);
  line-height: 1;
  letter-spacing: -0.03em;
}

.pricing-amount span {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-period {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.pricing-features li svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}

.pricing-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 10px 20px;
  border-radius: 9px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: -0.005em;
  border: 1px solid var(--border-hover);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s;
}

.pricing-btn:hover {
  background: rgba(56, 189, 248, 0.08);
  border-color: var(--accent);
}

.pricing-card.popular .pricing-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: #06080d;
}

.pricing-card.popular .pricing-btn:hover {
  background: var(--accent-bright);
}

/* ─── CONTACT SALES FORM ─── */
.contact-form-card {
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  backdrop-filter: blur(12px);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 600px) {
  .contact-form-row {
    grid-template-columns: 1fr;
  }
}

.contact-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-input {
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.2s;
}

.contact-input:focus {
  border-color: var(--accent);
}

.contact-textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-submit {
  margin-top: 8px;
}

.contact-success {
  color: var(--success);
  font-size: 0.85rem;
  text-align: center;
  margin-top: 8px;
  padding: 12px;
  border-radius: 8px;
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.2);
}

.contact-error {
  color: var(--danger);
  font-size: 0.85rem;
  text-align: center;
  margin-top: 8px;
}

/* ═══════════════════════════════════════════════════════
   CTA / FOOTER
   ═══════════════════════════════════════════════════════ */
.cta-section {
  text-align: center;
  padding: 5.5rem 2rem 2.5rem;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  position: relative;
}

.cta-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 460px;
  margin: 0 auto 1.75rem;
  line-height: 1.65;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.footer-links a:hover { color: var(--accent); }


/* ═══════════════════════════════════════════════════════
   CHAT AGENT PANEL
   ═══════════════════════════════════════════════════════ */
.chat-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out-expo);
}

.chat-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.chat-panel {
  position: fixed;
  right: -480px;
  top: 0;
  bottom: 0;
  width: 460px;
  max-width: 100vw;
  background: var(--bg-primary);
  border-left: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  transition: right 0.4s var(--ease-out-expo);
  box-shadow: -20px 0 60px rgba(0,0,0,0.4);
}

.chat-panel.open {
  right: 0;
}

.chat-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chat-panel-title-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--pulse));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chat-panel-title h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.chat-panel-title p {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.chat-close-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.chat-close-btn:hover {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.3);
  color: var(--danger);
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.chat-fullpage-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  text-decoration: none;
}

.chat-fullpage-btn:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--accent);
}

/* Settings bar */
.chat-settings {
  display: flex;
  gap: 8px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  align-items: center;
  flex-wrap: wrap;
}

.chat-setting-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}

.chat-setting-select {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
}

.chat-setting-select:focus { border-color: var(--accent); }

.chat-setting-select option {
  background: var(--bg-primary);
  color: var(--text-primary);
}

/* Messages */
.chat-messages {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 2px;
}

.chat-msg {
  max-width: 88%;
  animation: chatMsgIn 0.35s var(--ease-out-expo) both;
}

@keyframes chatMsgIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-msg.user {
  align-self: flex-end;
}

.chat-msg.assistant {
  align-self: flex-start;
}

.chat-msg-bubble {
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.85rem;
  line-height: 1.6;
  letter-spacing: -0.005em;
}

.chat-msg.user .chat-msg-bubble {
  background: var(--accent);
  color: #06080d;
  border-bottom-right-radius: 4px;
}

.chat-msg.assistant .chat-msg-bubble {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.chat-msg-meta {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  margin-top: 4px;
  padding: 0 4px;
}

.chat-msg.user .chat-msg-meta { text-align: right; }

/* Sources chips */
.chat-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}

.chat-source-chip {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.15);
  border-radius: 4px;
  padding: 2px 6px;
}

/* Typing indicator */
.chat-typing {
  display: flex;
  gap: 4px;
  padding: 14px 18px;
  align-items: center;
}

.chat-typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typing-bounce 1.4s infinite;
}

.chat-typing-dot:nth-child(2) { animation-delay: 0.15s; }
.chat-typing-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.3; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Input area */
.chat-input-area {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-input {
  flex: 1;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  outline: none;
  resize: none;
  min-height: 42px;
  max-height: 120px;
  line-height: 1.5;
  transition: border-color 0.2s;
  letter-spacing: -0.005em;
}

.chat-input::placeholder { color: var(--text-muted); }
.chat-input:focus { border-color: var(--accent); }

.chat-send-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--accent);
  border: none;
  color: #06080d;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.chat-send-btn:hover {
  background: var(--accent-bright);
  transform: translateY(-1px);
}

.chat-send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.chat-input-hint {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  margin-top: 6px;
  text-align: center;
}

/* Welcome state */
.chat-welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  gap: 12px;
}

.chat-welcome-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 4px;
}

.chat-welcome h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.chat-welcome p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  max-width: 300px;
  line-height: 1.5;
}

.chat-starters {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
  width: 100%;
  max-width: 320px;
}

.chat-starter-btn {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
  letter-spacing: -0.005em;
}

.chat-starter-btn:hover {
  border-color: var(--border-hover);
  background: rgba(56, 189, 248, 0.04);
  color: var(--text-primary);
}

/* Connection status */
.chat-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.chat-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
}

.chat-status-dot.connected { background: var(--success); }
.chat-status-dot.error { background: var(--danger); }


/* ═══════════════════════════════════════════════════════
   THEME TOGGLE
   ═══════════════════════════════════════════════════════ */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease-out-expo);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  border-color: var(--border-hover);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.05);
}

.theme-toggle svg {
  transition: transform 0.4s var(--ease-out-expo), opacity 0.3s;
  position: absolute;
}

.theme-toggle .icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.5); }
.theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }

[data-theme="light"] .theme-toggle .icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
[data-theme="light"] .theme-toggle .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.5); }


/* ═══════════════════════════════════════════════════════
   CHAT FILE UPLOAD
   ═══════════════════════════════════════════════════════ */
.chat-upload-btn {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.chat-upload-btn:hover {
  border-color: var(--border-hover);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.05);
}

.chat-upload-input { display: none; }

/* File preview */
.chat-file-preview {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  margin-bottom: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  animation: chatMsgIn 0.3s var(--ease-out-expo) both;
}

.chat-file-preview.active { display: flex; }

.chat-file-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.chat-file-info {
  flex: 1;
  min-width: 0;
}

.chat-file-name {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-file-size {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
}

.chat-file-remove {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s;
}

.chat-file-remove:hover {
  background: rgba(248, 113, 113, 0.1);
  color: var(--danger);
}

/* File in message bubble */
.chat-msg-file {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  margin-bottom: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.chat-msg.user .chat-msg-file {
  background: rgba(0,0,0,0.12);
  border-color: rgba(0,0,0,0.15);
}

.chat-msg-file-icon {
  color: var(--accent);
  flex-shrink: 0;
}

.chat-msg.user .chat-msg-file-icon { color: rgba(6, 8, 13, 0.6); }

.chat-msg-file-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-msg-file-size {
  color: inherit;
  opacity: 0.5;
  flex-shrink: 0;
}

/* Image preview in message */
.chat-msg-image {
  max-width: 100%;
  border-radius: 8px;
  margin-bottom: 6px;
  border: 1px solid rgba(255,255,255,0.06);
}

.chat-msg.user .chat-msg-image {
  border-color: rgba(0,0,0,0.15);
}

/* Drop zone */
.chat-messages.dragover {
  position: relative;
}

.chat-messages.dragover::after {
  content: 'Drop file here';
  position: absolute;
  inset: 12px;
  border: 2px dashed var(--accent);
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  pointer-events: none;
  z-index: 10;
}


/* ═══════════════════════════════════════════════════════
   AUTH MODAL
   ═══════════════════════════════════════════════════════ */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  z-index: 1100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out-expo);
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.auth-modal {
  width: 420px;
  max-width: calc(100vw - 2rem);
  max-height: calc(100vh - 2rem);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.4s var(--ease-out-expo);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(56,189,248,0.05);
}

.auth-overlay.open .auth-modal {
  transform: translateY(0) scale(1);
}

/* Header */
.auth-header {
  padding: 28px 28px 0;
  text-align: center;
  position: relative;
}

.auth-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.auth-close-btn:hover {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.3);
  color: var(--danger);
}

.auth-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--pulse));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  position: relative;
}

.auth-logo::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.2));
}

.auth-logo svg { position: relative; z-index: 1; }

.auth-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.auth-subheading {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

/* Tabs */
.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.auth-tab {
  flex: 1;
  padding: 10px 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  transition: color 0.2s;
}

.auth-tab::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 20%;
  width: 60%;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  opacity: 0;
  transition: opacity 0.25s;
}

.auth-tab.active {
  color: var(--accent);
}

.auth-tab.active::after {
  opacity: 1;
}

.auth-tab:hover {
  color: var(--text-primary);
}

/* Body / Forms */
.auth-body {
  padding: 24px 28px 28px;
}

.auth-form {
  display: none;
  flex-direction: column;
  gap: 14px;
}

.auth-form.active {
  display: flex;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.auth-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.auth-input {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  letter-spacing: -0.005em;
}

.auth-input::placeholder { color: var(--text-muted); }

.auth-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.08);
}

.auth-input.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.08);
}

.auth-field-error {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--danger);
  display: none;
}

.auth-field-error.show { display: block; }

/* Password row */
.auth-password-row {
  position: relative;
}

.auth-password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.auth-password-toggle:hover { color: var(--accent); }

/* Extras row */
.auth-extras {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.auth-remember {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.auth-remember input[type="checkbox"] {
  width: 15px;
  height: 15px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface);
  appearance: none;
  cursor: pointer;
  position: relative;
  transition: all 0.2s;
}

.auth-remember input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.auth-remember input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid #06080d;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.auth-forgot {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.auth-forgot:hover { color: var(--accent-bright); }

/* Submit */
.auth-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 20px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--pulse));
  color: #06080d;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: -0.01em;
  border: none;
  cursor: pointer;
  transition: all 0.3s var(--ease-out-expo);
  margin-top: 4px;
  position: relative;
  overflow: hidden;
}

.auth-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.15));
  opacity: 0;
  transition: opacity 0.3s;
}

.auth-submit:hover::before { opacity: 1; }

.auth-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(56, 189, 248, 0.3);
}

.auth-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.auth-submit .spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(6, 8, 13, 0.3);
  border-top-color: #06080d;
  border-radius: 50%;
  animation: auth-spin 0.6s linear infinite;
}

.auth-submit.loading .spinner { display: block; }
.auth-submit.loading .auth-submit-text { display: none; }

@keyframes auth-spin {
  to { transform: rotate(360deg); }
}

/* Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.auth-divider span {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Social buttons */
.auth-social-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.auth-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.auth-social-btn:hover {
  border-color: var(--border-hover);
  background: rgba(56, 189, 248, 0.03);
}

.auth-social-btn svg {
  flex-shrink: 0;
}

/* Footer note */
.auth-footer {
  text-align: center;
  padding: 0 28px 20px;
}

.auth-footer-text {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.auth-footer-text a {
  color: var(--accent);
}

/* Success state */
.auth-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem;
  gap: 12px;
}

.auth-success.active { display: flex; }

.auth-success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success);
  animation: auth-success-pop 0.5s var(--ease-out-expo) both;
}

@keyframes auth-success-pop {
  from { transform: scale(0.5); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.auth-success h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.auth-success p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  max-width: 280px;
}

/* Nav auth buttons */
.nav-auth-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-login-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color 0.2s;
  padding: 4px 0;
}

.nav-login-btn:hover { color: var(--accent); }

/* User menu (logged in state) */
.nav-user-menu {
  display: none;
  align-items: center;
  gap: 10px;
  position: relative;
}

.nav-user-menu.active { display: flex; }

.nav-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--pulse));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.72rem;
  color: #06080d;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
}

.nav-user-avatar:hover {
  border-color: rgba(56, 189, 248, 0.4);
}

.nav-user-name {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-primary);
}

.nav-user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 200px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: all 0.25s var(--ease-out-expo);
  z-index: 200;
}

.nav-user-dropdown.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 12px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
}

.nav-dropdown-item:hover {
  background: rgba(56, 189, 248, 0.06);
  color: var(--text-primary);
}

.nav-dropdown-item svg {
  flex-shrink: 0;
  color: var(--text-muted);
}

.nav-dropdown-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 8px;
}

.nav-dropdown-item.danger:hover {
  background: rgba(248, 113, 113, 0.06);
  color: var(--danger);
}

.nav-dropdown-item.danger:hover svg {
  color: var(--danger);
}

/* Password strength */
.auth-strength {
  display: flex;
  gap: 4px;
  margin-top: 2px;
}

.auth-strength-bar {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: rgba(255,255,255,0.05);
  transition: background 0.3s;
}

.auth-strength-bar.weak { background: var(--danger); }
.auth-strength-bar.medium { background: var(--warning); }
.auth-strength-bar.strong { background: var(--success); }

.auth-strength-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 2px;
}


/* ═══════════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════════ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(35px);
  transition: all 0.8s var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(25px);
  transition: all 0.7s var(--ease-out-expo);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.07s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.14s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.21s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 0.28s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 0.35s; opacity: 1; transform: translateY(0); }


/* ═══════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .feature-card.featured { grid-column: span 2; }
  .pipeline-flow { grid-template-columns: repeat(2, 1fr); }
  .arch-grid { grid-template-columns: 1fr; }
  .models-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
}

/* ─── TABLET ─── */
@media (min-width: 769px) and (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .models-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); max-width: 720px; }
}

/* ─── MOBILE ─── */
@media (max-width: 768px) {
  /* Nav */
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.25rem;
    gap: 0.5rem;
    z-index: 100;
  }
  .nav-mobile-toggle { display: block; }
  .nav-auth-group {
    flex-direction: column;
    gap: 8px;
  }

  /* Hero */
  .hero { padding: 100px 1.25rem 60px; }
  .hero h1 { font-size: 1.8rem; }
  .hero-subtitle { font-size: 0.9rem; }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-stats { gap: 1.5rem; }

  /* Sections */
  .section { padding: 3.5rem 1.25rem; }

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

  /* Pipeline */
  .pipeline-flow { grid-template-columns: 1fr; }
  .pipeline-step:not(:last-child)::after { display: none; }

  /* Models */
  .models-grid { grid-template-columns: 1fr; }

  /* Supply chain flow */
  .sc-flow { flex-direction: column; }

  /* API demo */
  .api-demo-body {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Footer & Chat */
  .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
  .chat-panel { width: 100vw; }
}

/* ─── SMALL PHONE ─── */
@media (max-width: 480px) {
  .hero h1 { font-size: 1.4rem; }
  .section-title { font-size: 1.3rem; }
  .section-inner { padding: 0 16px; }

  /* Touch-friendly tap targets */
  .btn-primary,
  .btn-secondary,
  .pricing-btn,
  .nav-cta,
  .nav-login-btn {
    min-height: 48px;
  }

  .pricing-card { margin: 0; }

  .chat-send-btn,
  .chat-upload-btn {
    min-width: 48px;
    min-height: 48px;
  }
}


/* ═══════════════════════════════════════════════════════
   DATASET MANAGER
   ═══════════════════════════════════════════════════════ */

/* Datasets toggle button in settings bar */
.chat-ds-toggle {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.68rem;
  font-family: var(--font-body);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s;
  white-space: nowrap;
}

.chat-ds-toggle:hover,
.chat-ds-toggle.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.06);
}

.chat-ds-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--border);
  border-radius: 8px;
  font-size: 0.6rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text-muted);
  transition: all 0.2s;
}

.chat-ds-count.has-items {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
}

/* Dataset panel */
.chat-datasets-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease-out-quart), border-bottom 0.2s;
  border-bottom: 0 solid transparent;
}

.chat-datasets-panel.open {
  max-height: 280px;
  border-bottom: 1px solid var(--border);
}

.chat-ds-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 6px;
}

.chat-ds-title {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.chat-ds-add-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: 6px;
  color: var(--accent);
  font-size: 0.65rem;
  font-family: var(--font-body);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s;
}

.chat-ds-add-btn:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent);
}

.chat-ds-list {
  max-height: 200px;
  overflow-y: auto;
  padding: 0 12px 10px;
}

.chat-ds-list::-webkit-scrollbar { width: 3px; }
.chat-ds-list::-webkit-scrollbar-track { background: transparent; }
.chat-ds-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.chat-ds-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 0;
  color: var(--text-muted);
  font-size: 0.68rem;
  text-align: center;
  line-height: 1.5;
}

.chat-ds-empty svg { opacity: 0.35; }

/* Individual dataset item */
.chat-ds-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: 8px;
  margin-bottom: 4px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: border-color 0.18s, background 0.18s;
}

.chat-ds-item:hover { border-color: var(--border-hover); background: var(--bg-card-hover); }
.chat-ds-item.status-ingesting { opacity: 0.75; }
.chat-ds-item.status-error { border-color: rgba(248, 113, 113, 0.2); }

.chat-ds-item-icon {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: rgba(56, 189, 248, 0.08);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.12);
}

.chat-ds-item-icon.ext-json { color: #a78bfa; background: rgba(167, 139, 250, 0.08); border-color: rgba(167,139,250,0.12); }
.chat-ds-item-icon.ext-xlsx,
.chat-ds-item-icon.ext-xls { color: var(--success); background: rgba(52, 211, 153, 0.08); border-color: rgba(52,211,153,0.12); }
.status-error .chat-ds-item-icon { color: var(--danger); background: rgba(248,113,113,0.08); border-color: rgba(248,113,113,0.12); }

.chat-ds-item-info {
  flex: 1;
  min-width: 0;
  cursor: pointer;
}

.chat-ds-item-label {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-ds-item-meta {
  font-family: var(--font-mono);
  font-size: 0.57rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.ds-status-badge {
  display: inline-block;
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.55rem;
  font-weight: 600;
  text-transform: uppercase;
}

.ds-status-badge.loaded { background: rgba(52,211,153,0.12); color: var(--success); }
.ds-status-badge.ingesting { background: rgba(251,191,36,0.12); color: var(--warning); }
.ds-status-badge.error { background: rgba(248,113,113,0.12); color: var(--danger); }

.chat-ds-item-remove {
  width: 22px;
  height: 22px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.15s;
  opacity: 0;
}

.chat-ds-item:hover .chat-ds-item-remove { opacity: 1; }
.chat-ds-item-remove:hover { background: rgba(248,113,113,0.1); color: var(--danger); }


/* ═══════════════════════════════════════════════════════
   KB INGEST MODAL
   ═══════════════════════════════════════════════════════ */
.kb-ingest-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s;
}

.kb-ingest-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.kb-ingest-modal {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 28px 24px;
  width: 380px;
  max-width: calc(100vw - 32px);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  transform: scale(0.94) translateY(8px);
  transition: transform 0.28s var(--ease-out-expo);
}

.kb-ingest-overlay.open .kb-ingest-modal {
  transform: scale(1) translateY(0);
}

.kb-ingest-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 14px;
}

.kb-ingest-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 6px;
}

.kb-ingest-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0 0 16px;
}

.kb-ingest-label-row {
  margin-bottom: 18px;
}

.kb-ingest-label-text {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kb-ingest-label-input {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.82rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.18s;
  box-sizing: border-box;
}

.kb-ingest-label-input:focus { border-color: var(--accent); }
.kb-ingest-label-input::placeholder { color: var(--text-muted); }

.kb-ingest-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kb-ingest-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 16px;
  border-radius: 9px;
  font-size: 0.82rem;
  font-family: var(--font-body);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s;
  border: 1px solid transparent;
}

.kb-ingest-btn.primary {
  background: var(--accent);
  color: #06080d;
  border-color: var(--accent);
}
.kb-ingest-btn.primary:hover { background: var(--accent-bright); }

.kb-ingest-btn.secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border);
}
.kb-ingest-btn.secondary:hover { border-color: var(--border-hover); background: var(--bg-card-hover); }

.kb-ingest-btn.ghost {
  background: transparent;
  color: var(--text-muted);
}
.kb-ingest-btn.ghost:hover { color: var(--text-secondary); }

[data-theme="light"] .kb-ingest-btn.primary { color: #fff; }


/* ═══════════════════════════════════════════════════════
   TOAST NOTIFICATION
   ═══════════════════════════════════════════════════════ */
.cfp-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 10px 20px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  z-index: 3000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s var(--ease-out-expo);
  white-space: nowrap;
  max-width: calc(100vw - 40px);
}

.cfp-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.cfp-toast.success { border-color: rgba(52, 211, 153, 0.3); color: var(--success); }
.cfp-toast.error { border-color: rgba(248, 113, 113, 0.3); color: var(--danger); }
.cfp-toast.info { border-color: var(--border-hover); }


/* ═══════════════════════════════════════════════════════
   VISUALIZATION DOWNLOAD BUTTONS
   ═══════════════════════════════════════════════════════ */
.chat-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  margin: 4px 4px 4px 0;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 7px;
  color: var(--accent, #38bdf8);
  font-size: 0.72rem;
  font-weight: 500;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  text-decoration: none;
  transition: all 0.18s;
  cursor: pointer;
}

.chat-download-btn:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent, #38bdf8);
  box-shadow: 0 2px 10px rgba(56, 189, 248, 0.15);
  transform: translateY(-1px);
}

.chat-download-btn svg {
  flex-shrink: 0;
}

.chat-msg-bubble a:not(.chat-download-btn) {
  color: var(--accent, #38bdf8);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.chat-msg-bubble a:not(.chat-download-btn):hover {
  color: var(--accent-bright, #7dd3fc);
}

.chat-msg-bubble strong {
  font-weight: 600;
  color: var(--text-primary, #f1f5f9);
}

[data-theme="light"] .chat-download-btn {
  background: rgba(56, 189, 248, 0.06);
  border-color: rgba(56, 189, 248, 0.3);
}

[data-theme="light"] .chat-msg-bubble strong {
  color: #1e293b;
}


/* ═══════════════════════════════════════════════════════
   CHART VISUALIZATION — inline chat charts
   ═══════════════════════════════════════════════════════ */

/* Outer wrapper — picked up by the entrance animation in animations.css */
.chat-chart-wrap {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  margin: 12px 0;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-sizing: border-box;
}

.chat-chart-wrap canvas {
  max-width: 100% !important;
  height: auto !important;
}

.chat-chart-container {
  margin-top: 0;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.chat-chart-container canvas {
  max-height: 320px !important;
  width: 100% !important;
  height: auto !important;
}

/* Download button */
.chart-dl-btn {
  display: block;
  margin: 6px auto 0;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.chart-dl-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.chart-legend {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.chart-legend::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* Visualization mode toggle button */
.chart-toggle-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid rgba(56, 189, 248, 0.2);
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.chart-toggle-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.06);
}

.chart-toggle-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.15);
}

/* Light mode overrides */
[data-theme="light"] .chat-chart-container {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(15, 60, 100, 0.12);
}