/**
 * PSX GenAI Advisor — Enterprise Design System
 * Brand: Deep Navy · Emerald Green · Gold · White · Soft Gray
 */

:root {
  /* Brand — PSX / Finance / Trust / Intelligence */
  --psx-navy-950: #050D18;
  --psx-navy-900: #0B1F33;
  --psx-navy-800: #122D4A;
  --psx-navy-700: #1A3D5C;
  --psx-navy-600: #245078;
  --psx-emerald-500: #10B981;
  --psx-emerald-400: #34D399;
  --psx-emerald-glow: rgba(16, 185, 129, 0.35);
  --psx-gold-500: #D4AF37;
  --psx-gold-400: #E8C547;
  --psx-gold-soft: rgba(212, 175, 55, 0.15);
  --psx-white: #FFFFFF;
  --psx-gray-50: #F8FAFC;
  --psx-gray-100: #F1F5F9;
  --psx-gray-200: #E2E8F0;
  --psx-gray-400: #94A3B8;
  --psx-gray-600: #64748B;
  --psx-gray-800: #1E293B;
  --psx-red: #EF4444;
  --psx-green: #10B981;

  /* Semantic aliases (map to style.css) */
  --canvas: var(--psx-gray-50);
  --surface: var(--psx-white);
  --surface-2: var(--psx-gray-100);
  --navy: var(--psx-navy-900);
  --navy-soft: var(--psx-navy-800);
  --blue: #2563EB;
  --green: var(--psx-emerald-400);
  --green-deep: var(--psx-emerald-500);
  --amber: var(--psx-gold-500);
  --border: var(--psx-gray-200);
  --shadow-sm: 0 1px 2px rgba(11, 31, 51, 0.05), 0 1px 3px rgba(11, 31, 51, 0.04);
  --shadow-md: 0 8px 24px rgba(11, 31, 51, 0.1);
  --shadow-lg: 0 20px 48px rgba(11, 31, 51, 0.14);
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  /* Typography scale */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Poppins', var(--font-sans);
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Spacing scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* ── Engineering badges ── */
.eng-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.eng-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
}
.eng-badge-fastapi { background: rgba(37, 99, 235, 0.12); color: #1D4ED8; border-color: rgba(37, 99, 235, 0.25); }
.eng-badge-llm { background: rgba(16, 185, 129, 0.12); color: #059669; border-color: rgba(16, 185, 129, 0.25); }
.eng-badge-cache { background: rgba(212, 175, 55, 0.12); color: #B8860B; border-color: rgba(212, 175, 55, 0.3); }
.eng-badge-rules { background: rgba(139, 92, 246, 0.12); color: #7C3AED; border-color: rgba(139, 92, 246, 0.25); }
.eng-badge-hybrid { background: rgba(11, 31, 51, 0.08); color: var(--psx-navy-800); border-color: var(--psx-gray-200); }

/* ── Breadcrumbs ── */
.breadcrumb-bar {
  background: var(--psx-gray-50);
  border-bottom: 1px solid var(--border);
  padding: 8px 24px;
  font-size: var(--text-xs);
  color: var(--psx-gray-600);
}
.breadcrumb-bar a { color: var(--psx-navy-700); text-decoration: none; font-weight: 500; }
.breadcrumb-bar a:hover { color: var(--psx-emerald-500); }
.breadcrumb-bar span.sep { margin: 0 8px; opacity: 0.4; }

/* ── Context / storytelling panel ── */
.context-panel {
  background: linear-gradient(135deg, rgba(11, 31, 51, 0.03) 0%, rgba(16, 185, 129, 0.06) 100%);
  border: 1px solid var(--border);
  border-left: 4px solid var(--psx-emerald-500);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-6);
}
.context-panel h3 {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--psx-navy-900);
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.context-panel p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--psx-gray-600);
  line-height: 1.65;
  max-width: 72ch;
}

/* ── Premium card variants ── */
.card-premium {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
}
.card-premium:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.card-glass {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
}

/* ── Reveal on scroll ── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Count-up stat ── */
.stat-count {
  font-variant-numeric: tabular-nums;
  font-family: var(--font-heading);
}

/* ── Top nav (app shell) ── */
.app-topnav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  padding-right: var(--space-2);
}
.app-topnav a {
  font-size: 12px;
  font-weight: 600;
  color: var(--psx-gray-600);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
  transition: all var(--duration-fast);
}
.app-topnav a:hover { background: var(--psx-gray-100); color: var(--psx-navy-900); }
.app-topnav a.active { background: rgba(16, 185, 129, 0.12); color: var(--psx-emerald-500); }

/* ── Sidebar brand block ── */
.sidebar-brand {
  display: flex;
  align-items: flex-start;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.sidebar-brand .sidebar-logo {
  width: 100%;
  max-width: 210px;
  height: auto;
  display: block;
}

/* ── Premium KPI accent ── */
.kpi.featured {
  background: linear-gradient(145deg, var(--psx-navy-900) 0%, var(--psx-navy-800) 100%);
  border-color: transparent;
  box-shadow: var(--shadow-md);
}
.kpi.featured .value { color: var(--psx-emerald-400); }

/* ── Chart container ── */
.chart-wrap {
  position: relative;
  padding: var(--space-4);
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* ═══════════════════════════════════════
   LANDING PAGE — Premium Enterprise
   ═══════════════════════════════════════ */
.landing-premium {
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 46%, #F8FAFC 100%);
  color: var(--psx-navy-900);
  overflow-x: hidden;
}

.landing-ticker {
  background: var(--psx-navy-900);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
  height: 36px;
  display: flex;
  align-items: center;
}
.ticker-track {
  display: flex;
  gap: 48px;
  animation: ticker-scroll 40s linear infinite;
  white-space: nowrap;
  padding-left: 100%;
}
.ticker-item {
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.ticker-item.up { color: var(--psx-emerald-400); }
.ticker-item.down { color: var(--psx-red); }
@keyframes ticker-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-100%); }
}

.landing-nav-premium {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 13, 24, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.landing-nav-inner-premium {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.hero-premium {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding: var(--space-16) 24px;
  overflow: hidden;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
}
.hero-bg-chart {
  position: absolute;
  inset: 0;
  opacity: 0.12;
  pointer-events: none;
}
.hero-bg-chart canvas { width: 100% !important; height: 100% !important; }
.hero-particles {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212, 175, 55, 0.04) 0%, transparent 40%);
  pointer-events: none;
}
.hero-inner-premium {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero-premium h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin: 0 0 20px;
  color: var(--psx-navy-900);
}
.hero-premium .hero-sub {
  font-size: 1.2rem;
  color: var(--psx-gray-600);
  line-height: 1.6;
  margin: 0 0 32px;
  max-width: 560px;
}
.hero-cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--psx-emerald-500), #059669);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  border-radius: 12px;
  text-decoration: none;
  box-shadow: 0 8px 32px var(--psx-emerald-glow);
  transition: transform var(--duration-normal), box-shadow var(--duration-normal);
}
.btn-hero-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px var(--psx-emerald-glow); }
.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  padding: 14px 24px;
  border: 1px solid var(--border);
  color: var(--psx-navy-800);
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  background: var(--psx-white);
  box-shadow: 0 1px 2px rgba(11, 31, 51, 0.04);
  transition: background var(--duration-fast), border-color var(--duration-fast), color var(--duration-fast);
}
.btn-hero-secondary:hover { background: var(--psx-gray-100); border-color: var(--psx-gray-400); color: var(--psx-navy-900); }
.btn-hero-primary:focus-visible,
.btn-hero-secondary:focus-visible,
.landing-links a:focus-visible {
  outline: 3px solid rgba(16, 185, 129, 0.22);
  outline-offset: 3px;
}

.hero-visual-card {
  background: linear-gradient(180deg, var(--psx-white) 0%, var(--psx-gray-50) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-md);
}
.hero-mini-chart { height: 180px; margin-top: 16px; }

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 24px;
}
.trust-item {
  text-align: center;
  padding: 20px;
  border-radius: var(--radius);
  background: var(--psx-white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.trust-item .num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--psx-emerald-400);
}
.trust-item .lbl { font-size: 12px; color: var(--psx-gray-400); margin-top: 4px; }

.section-premium {
  max-width: 1280px;
  margin: 0 auto;
  padding: 64px 24px;
  color: var(--psx-navy-900);
}
.section-premium.full-bleed {
  max-width: 100%;
  background: linear-gradient(180deg, #F8FAFC 0%, #EEF2F7 100%);
  border-top: 1px solid rgba(148, 163, 184, 0.18);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}
.section-premium.full-bleed > * { max-width: 1280px; margin-left: auto; margin-right: auto; }
.section-title-premium {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  text-align: center;
  margin: 0 0 12px;
  color: var(--psx-navy-900);
}
.section-sub-premium {
  text-align: center;
  color: var(--psx-gray-600);
  margin: 0 auto 40px;
  max-width: 560px;
  font-size: var(--text-base);
}

.feature-grid-premium {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.feature-card-premium {
  background: var(--psx-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.feature-card-premium::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--psx-emerald-500), var(--psx-gold-500));
  opacity: 0;
  transition: opacity var(--duration-normal);
}
.feature-card-premium:hover {
  transform: translateY(-6px);
  border-color: rgba(16, 185, 129, 0.35);
  box-shadow: var(--shadow-md);
}
.feature-card-premium:hover::before { opacity: 1; }
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(16, 185, 129, 0.15);
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 16px;
}
.feature-card-premium h3 {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--psx-navy-900);
  margin: 0 0 8px;
}
.feature-card-premium p { font-size: var(--text-sm); color: var(--psx-gray-600); line-height: 1.6; margin: 0; }

.workflow-svg-wrap {
  display: flex;
  justify-content: center;
  padding: 24px 0;
}
.workflow-svg-wrap svg { max-width: 100%; height: auto; }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 16px;
}
.tech-card {
  background: var(--psx-white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 12px;
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--psx-navy-800);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-normal), border-color var(--duration-normal), box-shadow var(--duration-normal), color var(--duration-normal);
}
.tech-card:hover { transform: scale(1.03); color: var(--psx-navy-900); border-color: var(--psx-emerald-500); box-shadow: var(--shadow-md); }

.screenshot-carousel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.screenshot-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--psx-white);
  backdrop-filter: blur(8px);
  transition: transform var(--duration-normal), border-color var(--duration-normal), box-shadow var(--duration-normal);
  box-shadow: var(--shadow-sm);
}
.screenshot-card:hover { transform: scale(1.02); border-color: rgba(16, 185, 129, 0.35); box-shadow: var(--shadow-md); }
.screenshot-preview {
  height: 160px;
  background: linear-gradient(145deg, var(--psx-navy-800), var(--psx-navy-700));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  opacity: 0.9;
}
.screenshot-card h4 {
  padding: 16px;
  margin: 0;
  font-size: 14px;
  color: var(--psx-navy-900);
  font-family: var(--font-heading);
}
.screenshot-card p {
  padding: 0 16px 16px;
  margin: 0;
  font-size: 12px;
  color: var(--psx-gray-600);
}

.timeline {
  position: relative;
  padding-left: 32px;
  border-left: 2px solid rgba(16, 185, 129, 0.35);
  max-width: 640px;
  margin: 0 auto;
  background: var(--psx-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 28px 32px 8px;
}
.timeline-item {
  position: relative;
  padding-bottom: 32px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -37px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--psx-emerald-500);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
}
.timeline-item h4 { color: var(--psx-navy-900); margin: 0 0 6px; font-family: var(--font-heading); }
.timeline-item p { color: var(--psx-gray-600); font-size: 14px; margin: 0; line-height: 1.6; }

.landing-footer-premium {
  background: var(--psx-navy-950);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 48px 24px 32px;
}
.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}
.footer-grid h4 { color: #fff; font-size: 14px; margin: 0 0 12px; }
.footer-grid p, .footer-grid a {
  color: var(--psx-gray-400);
  font-size: 13px;
  line-height: 1.8;
  text-decoration: none;
}
.footer-grid a:hover { color: var(--psx-emerald-400); }
.footer-copy {
  max-width: 1280px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
  font-size: 12px;
  color: var(--psx-gray-600);
}

@media (max-width: 900px) {
  .hero-inner-premium { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .app-topnav { display: none; }
}