/* ==========================================================================
   Nuklai Nexus Landing Page - Premium Light Theme Stylesheet
   ========================================================================== */

/* Design Tokens & Custom Variables */
:root {
  --color-bg: #FAF9F6; /* Premium soft warm ivory */
  --color-bg-rgb: 250, 249, 246;
  --color-surface: rgba(255, 255, 255, 0.85);
  --color-surface-soft: #FFFFFF;
  --color-text: #111625; /* Elegant deep charcoal/navy */
  --color-text-muted: #5C6479; /* Soft mid-gray */
  --color-border: rgba(17, 22, 37, 0.08); /* Clean subtle border */
  --color-border-hover: rgba(17, 22, 37, 0.18);
  
  /* Brand Accent Colors */
  --color-blue: #2563EB; /* Premium corporate blue */
  --color-blue-rgb: 37, 99, 235;
  --color-teal: #0D9488; /* Corporate teal */
  --color-teal-rgb: 13, 148, 136;
  --color-gold: #9E7A28; /* Warm M&A gold */
  --color-gold-rgb: 158, 122, 40;
  --color-red: #DC2626;
  --color-yellow: #D97706;
  
  /* Typography */
  --font-heading: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Layout & Spacing */
  --header-height: 80px;
  --max-width: 1200px;
  --radius-lg: 24px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  /* Shadow Elevation */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
}

/* Reset & Base Rules */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 62.5%; /* 1rem = 10px */
  scroll-behavior: smooth;
  background-color: var(--color-bg);
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1.6rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

.max-w-3xl {
  max-width: 768px;
}

/* Section Spacing */
section {
  padding: clamp(6rem, 10vw, 12rem) 0;
  position: relative;
}

.border-t {
  border-top: 1px solid var(--color-border);
}

.border-b {
  border-bottom: 1px solid var(--color-border);
}

.m-top-2 { margin-top: 0.8rem; }
.m-top-3 { margin-top: 1.6rem; }
.m-top-4 { margin-top: 2.4rem; }
.m-top-6 { margin-top: 4.8rem; }
.m-top-8 { margin-top: 8rem; }
.w-full { width: 100%; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }

/* Typography Helpers */
.serif-heading {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-title {
  font-size: clamp(2.8rem, 5vw, 4.4rem);
  margin-bottom: 2rem;
  color: var(--color-text);
}

.section-subtitle {
  font-size: clamp(1.6rem, 2.5vw, 1.8rem);
  color: var(--color-text-muted);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 300;
}

/* Soft Light Radial Glows */
.radial-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.25;
}

.glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(var(--color-blue-rgb), 0.15) 0%, transparent 70%);
  top: -100px;
  left: -200px;
}

.glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(var(--color-gold-rgb), 0.12) 0%, transparent 70%);
  top: 600px;
  right: -100px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.4rem 2.8rem;
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-text);
  color: var(--color-bg-rgb);
  color: #FFFFFF;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -10px rgba(var(--color-blue-rgb), 0.3);
  background-color: #2D3748;
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--color-text);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: #F9FAFB;
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.btn-text-action {
  background: none;
  border: none;
  color: var(--color-blue);
  font-family: var(--font-body);
  font-size: 1.4rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  transition: color 0.2s;
}

.btn-text-action:hover {
  color: #1D4ED8;
}

/* Badge */
.badge-pill {
  display: inline-block;
  padding: 0.6rem 1.6rem;
  background-color: rgba(var(--color-gold-rgb), 0.08);
  border: 1px solid rgba(var(--color-gold-rgb), 0.25);
  color: var(--color-gold);
  border-radius: 100px;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 2.4rem;
}

/* Navigation Header */
header {
  height: var(--header-height);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: rgba(250, 249, 246, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all 0.3s;
}

.nav-container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo-group {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 1.2rem;
}

.logo-nuklai {
  height: 24px;
  width: auto;
}

.logo-divider {
  width: 1px;
  height: 16px;
  background-color: var(--color-border-hover);
}

.logo-nexus-text {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: 0.15em;
  color: var(--color-text);
}

#desktop-nav {
  display: flex;
  gap: 3.2rem;
}

.nav-link {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--color-text);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  z-index: 110;
}

.mobile-toggle .bar {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all 0.3s;
}

/* Mobile Drawer Menu */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: rgba(250, 249, 246, 0.98);
  backdrop-filter: blur(20px);
  z-index: 99;
  display: flex;
  flex-direction: column;
  padding: 4rem;
  gap: 2.4rem;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-link {
  font-size: 2rem;
  font-family: var(--font-heading);
  text-decoration: none;
  color: var(--color-text);
}

/* Grid Layout Systems */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6.4rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3.2rem;
}

.align-center {
  align-items: center;
}

/* Hero Section */
.hero {
  padding-top: calc(var(--header-height) + 6rem);
  padding-bottom: clamp(6rem, 10vw, 12rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 6.4rem;
  align-items: center;
}

.hero-title {
  font-size: clamp(3.6rem, 6vw, 5.8rem);
  margin-bottom: 2.4rem;
}

.hero-subtitle {
  font-size: clamp(1.6rem, 2.5vw, 1.8rem);
  color: var(--color-text-muted);
  font-weight: 300;
  margin-bottom: 3.6rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 1.6rem;
  margin-bottom: 4.8rem;
}

.hero-proof-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

.hero-proof-points li {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-size: 1.4rem;
  color: var(--color-text);
}

.proof-icon {
  width: 6px;
  height: 6px;
  background-color: var(--color-gold);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px rgba(var(--color-gold-rgb), 0.4);
}

/* Premium Light Mockup Interface (Hero Right) */
.hero-visual-wrapper {
  perspective: 1000px;
}

.workspace-mockup {
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 1px 2px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 440px;
  transform: rotateY(-3deg) rotateX(2deg);
  transition: transform 0.5s;
}

.workspace-mockup:hover {
  transform: rotateY(0deg) rotateX(0deg);
}

/* Nexus App HeaderBar Mockup */
.nexus-app-header {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-surface-soft);
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  box-sizing: border-box;
  flex-shrink: 0;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.menu-toggle-btn, .app-theme-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
  padding: 0.4rem;
  border-radius: 4px;
}

.menu-toggle-btn:hover, .app-theme-toggle:hover {
  color: var(--color-text);
  background-color: rgba(0, 0, 0, 0.04);
}

.app-logo-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-logo-img-nexus {
  height: 20px;
  width: auto;
}

.app-logo-divider {
  width: 1px;
  height: 14px;
  background-color: var(--color-border-hover);
}

.app-logo-text {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.12em;
  color: var(--color-text);
}

.app-user-profile {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  color: var(--color-text);
  background-color: var(--color-surface-soft);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  font-weight: 550;
  transition: all 0.2s ease;
  height: 28px;
}

.app-user-profile:hover {
  background-color: #F1F5F9;
  border-color: var(--color-border-hover);
}

.user-avatar-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

/* App Main Body */
.nexus-app-body {
  display: flex;
  flex: 1 1 auto;
  overflow: hidden;
  height: calc(100% - 52px);
}

/* Sidebar Menu */
.nexus-app-sidebar {
  width: 160px;
  background-color: #FAF9F6;
  border-right: 1px solid var(--color-border);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-menu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.sidebar-menu-item {
  display: flex;
  flex-direction: column;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 500;
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  transition: all 0.2s;
}

.sidebar-link:hover {
  background-color: rgba(0, 0, 0, 0.03);
  color: var(--color-text);
}

.sidebar-menu-item.active > .sidebar-link {
  color: var(--color-blue);
  background-color: rgba(var(--color-blue-rgb), 0.07);
  font-weight: 600;
}

.sidebar-icon {
  flex-shrink: 0;
  stroke-width: 2.2;
}

.sidebar-submenu-list {
  list-style: none;
  padding-left: 2rem;
  margin-top: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.submenu-item {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.submenu-item.selected {
  color: var(--color-blue);
  background-color: rgba(var(--color-blue-rgb), 0.07);
  font-weight: 550;
}

/* App Main Content Window */
.nexus-app-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: #F8FAFC;
  position: relative;
  overflow: hidden;
}

.app-content-header {
  background-color: var(--color-surface-soft);
  padding: 0.8rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.app-content-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  border-left: 3px solid var(--color-blue);
  padding-left: 0.6rem;
  line-height: 1.2;
  margin: 0;
  font-family: 'Lora', Georgia, serif;
}

.nexus-chat-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.nexus-chat-feed {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Nexus Chat Message Styling */
.nexus-message-wrapper {
  display: flex;
  gap: 1.2rem;
}

.nexus-message-wrapper.user {
  justify-content: flex-end;
}

.nexus-bubble {
  max-width: 82%;
  padding: 1.2rem 1.6rem;
  font-size: 1.25rem;
  line-height: 1.5;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.nexus-message-wrapper.user .nexus-bubble {
  background: rgba(var(--color-blue-rgb), 0.06);
  color: var(--color-text);
  border: 1px solid rgba(var(--color-blue-rgb), 0.15);
  border-radius: 6px;
}

.nexus-avatar-img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
  margin-top: 2px;
}

.nexus-message-wrapper.bot .nexus-bubble {
  background: #FFFFFF;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  flex: 1;
}

/* Reasoning Section in Bubbles */
.nexus-reasoning-section {
  margin-bottom: 0.8rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.6rem;
}

.nexus-reasoning-toggle {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: none;
  border: none;
  cursor: pointer;
  color: #6B7280;
  font-size: 1.15rem;
  padding: 0.25rem 0;
  transition: color 0.2s ease;
  width: 100%;
  text-align: left;
  font-weight: 550;
}

.nexus-reasoning-toggle:hover {
  color: #374151;
}

.nexus-reasoning-toggle .chevron-icon {
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.nexus-reasoning-toggle .chevron-icon.rotated {
  transform: rotate(180deg);
}

.nexus-reasoning-content {
  display: none;
  margin-top: 0.6rem;
  padding: 0.8rem;
  background: #F9FAFB;
  border-radius: 6px;
  border-left: 3px solid #D1D5DB;
  font-size: 1.1rem;
  font-style: italic;
  color: #4B5563;
  line-height: 1.45;
}

.nexus-reasoning-content.open {
  display: block;
}

/* Tool execution blocks */
.nexus-tool-calls-section {
  margin: 0.4rem 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.nexus-tool-call-card {
  background: rgba(37, 99, 235, 0.05);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: 6px;
  overflow: hidden;
  color: var(--color-blue);
  width: fit-content;
}

.nexus-tool-call-card .tool-call-header {
  padding: 0.4rem 0.8rem;
  display: flex;
  align-items: center;
}

.nexus-tool-call-card .tool-call-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.1rem;
  font-weight: 550;
}

.nexus-tool-call-card .status-icon {
  stroke: var(--color-blue);
}

.nexus-label-area {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1.2rem;
  border-top: 1px solid var(--color-border);
  padding-top: 0.8rem;
}

.label-left {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

.nexus-tag {
  font-size: 1rem;
  background: rgba(var(--color-blue-rgb), 0.06);
  color: var(--color-blue);
  border: 1px solid rgba(var(--color-blue-rgb), 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 550;
}

.nexus-info-btn, .nexus-copy-btn {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all 0.2s;
}

.nexus-info-btn:hover, .nexus-copy-btn:hover {
  background-color: rgba(0,0,0,0.04);
  color: var(--color-text);
}

/* Chat Input Mockup Pane */
.nexus-chat-input-area {
  padding: 1.2rem 1.6rem;
  background-color: #F8FAFC;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}



.nexus-input-group {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: #FFFFFF;
  padding: 0.4rem 0.6rem;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.nexus-textarea {
  flex: 1;
  border: none;
  resize: none;
  outline: none;
  font-size: 1.15rem;
  font-family: var(--font-body);
  background: transparent;
  padding: 0.6rem;
  color: var(--color-text);
}

.nexus-input-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.nexus-config-btn, .nexus-send-btn {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.nexus-config-btn:hover {
  background-color: rgba(0,0,0,0.04);
  color: var(--color-text);
}

.nexus-send-btn {
  background-color: var(--color-blue);
  color: #FFFFFF;
}

.nexus-send-btn:hover {
  background-color: #1D4ED8;
}

.risk-card {
  background-color: #F9FAFB;
  border: 1px solid var(--color-border);
  padding: 1.2rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.risk-card.high {
  border-left: 3px solid var(--color-red);
}

.risk-card.medium {
  border-left: 3px solid var(--color-yellow);
}

.risk-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.risk-badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.high .risk-badge {
  background-color: rgba(220, 38, 38, 0.1);
  color: var(--color-red);
}

.medium .risk-badge {
  background-color: rgba(217, 119, 6, 0.15);
  color: var(--color-yellow);
}

.risk-card h4 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
}

.risk-card p {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin: 0 !important;
}

/* Slide out Evidence drawer */
.evidence-drawer {
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background-color: #FFFFFF;
  border-left: 1px solid var(--color-border);
  z-index: 10;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.evidence-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  padding: 1.6rem 2rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text);
  background-color: #F9FAFB;
}

.close-drawer-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 2.2rem;
  cursor: pointer;
}

.drawer-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  background-color: #FFFFFF;
}

.trace-step {
  display: flex;
  gap: 1.6rem;
  align-items: flex-start;
}

.trace-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(var(--color-blue-rgb), 0.4);
  color: var(--color-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.trace-step-detail {
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

.trace-step-detail strong {
  color: var(--color-text);
}

.quote-box {
  background-color: #F9FAFB;
  border-left: 2px solid var(--color-blue);
  padding: 1rem;
  border-radius: 4px;
  margin-top: 0.8rem;
  font-style: italic;
  font-size: 1.15rem;
  color: var(--color-text);
  border-top: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.quote-source {
  display: block;
  font-style: normal;
  color: var(--color-blue);
  margin-top: 0.6rem;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
}

.code-block {
  background-color: #0F172A;
  padding: 1.2rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: #38BDF8;
  margin-top: 0.8rem;
}

/* Section 2: Pain Cards */
.pain-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  padding: 4.8rem 4rem 4rem 4rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.pain-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}

/* Pain Card Blue (Sources) */
.pain-card.pain-blue::before {
  background-color: var(--color-blue);
}

.pain-card.pain-blue:hover {
  border-color: rgba(var(--color-blue-rgb), 0.25);
  box-shadow: 0 20px 40px rgba(var(--color-blue-rgb), 0.05);
  background-image: radial-gradient(circle at top right, rgba(var(--color-blue-rgb), 0.02) 0%, transparent 60%);
  transform: translateY(-5px);
}

.pain-card.pain-blue .pain-icon-wrapper {
  background-color: rgba(var(--color-blue-rgb), 0.08);
  border-color: rgba(var(--color-blue-rgb), 0.2);
  color: var(--color-blue);
}

/* Pain Card Gold (Bottlenecks) */
.pain-card.pain-gold::before {
  background-color: var(--color-gold);
}

.pain-card.pain-gold:hover {
  border-color: rgba(var(--color-gold-rgb), 0.25);
  box-shadow: 0 20px 40px rgba(var(--color-gold-rgb), 0.06);
  background-image: radial-gradient(circle at top right, rgba(var(--color-gold-rgb), 0.02) 0%, transparent 60%);
  transform: translateY(-5px);
}

.pain-card.pain-gold .pain-icon-wrapper {
  background-color: rgba(var(--color-gold-rgb), 0.08);
  border-color: rgba(var(--color-gold-rgb), 0.25);
  color: var(--color-gold);
}

/* Pain Card Red (Traceability) */
.pain-card.pain-red::before {
  background-color: var(--color-red);
}

.pain-card.pain-red:hover {
  border-color: rgba(220, 38, 38, 0.2);
  box-shadow: 0 20px 40px rgba(220, 38, 38, 0.04);
  background-image: radial-gradient(circle at top right, rgba(220, 38, 38, 0.015) 0%, transparent 60%);
  transform: translateY(-5px);
}

.pain-card.pain-red .pain-icon-wrapper {
  background-color: rgba(220, 38, 38, 0.08);
  border-color: rgba(220, 38, 38, 0.2);
  color: var(--color-red);
}

.pain-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2.4rem;
}

.pain-card h3 {
  font-size: 2rem;
  margin-bottom: 1.6rem;
  font-family: var(--font-heading);
  font-weight: 500;
}

.pain-card p {
  color: var(--color-text-muted);
  font-size: 1.45rem;
  line-height: 1.6;
}

/* Section 3: Interactive Diligence Demo Simulator */
.demo-flow-section {
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
}

.demo-flow-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.demo-steps-timeline {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
}

.demo-step-indicator {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  opacity: 0.4;
  transition: opacity 0.3s;
}

.demo-step-indicator.active {
  opacity: 1;
}

.demo-step-indicator .circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-family: var(--font-mono);
  flex-shrink: 0;
  transition: all 0.3s;
  background-color: #FFFFFF;
}

.demo-step-indicator.active .circle {
  border-color: var(--color-gold);
  background-color: var(--color-gold);
  color: #FFFFFF;
  box-shadow: 0 0 12px rgba(var(--color-gold-rgb), 0.3);
}

.demo-step-indicator div strong {
  display: block;
  font-size: 1.5rem;
  color: var(--color-text);
}

.demo-step-indicator div p {
  font-size: 1.3rem;
  color: var(--color-text-muted);
}

.demo-simulator-viewport {
  display: flex;
  justify-content: center;
}

.simulator-box {
  width: 100%;
  max-width: 480px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  height: 380px;
  display: flex;
  flex-direction: column;
}

.sim-header {
  height: 44px;
  background-color: #F9FAFB;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
}

.sim-pill {
  font-size: 1.1rem;
  font-family: var(--font-mono);
  color: var(--color-gold);
  text-transform: uppercase;
  font-weight: 600;
}

.sim-status {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.sim-content {
  flex: 1;
  padding: 2.4rem;
  position: relative;
  overflow-y: auto;
  background-color: #FFFFFF;
}

.sim-view {
  display: none;
  height: 100%;
}

.sim-view.active {
  display: flex;
  flex-direction: column;
}

.sim-instruction {
  font-size: 1.4rem;
  color: var(--color-text-muted);
  margin-bottom: 1.6rem;
}

/* Step 1: Connect Sources Styling */
.sources-connect-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.source-connect-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #FAF9F6;
  border: 1px solid var(--color-border);
  padding: 1rem 1.4rem;
  border-radius: 6px;
  transition: border-color 0.2s ease;
}

.source-connect-item:hover {
  border-color: var(--color-border-hover);
}

.source-item-info {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.source-item-info strong {
  display: block;
  font-size: 1.2rem;
  color: var(--color-text);
  font-family: var(--font-body);
}

.source-item-info .sub-label {
  display: block;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.source-connect-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.source-connect-icon.blue {
  background-color: rgba(var(--color-blue-rgb), 0.08);
  color: var(--color-blue);
}

.source-connect-icon.gold {
  background-color: rgba(var(--color-gold-rgb), 0.08);
  color: var(--color-gold);
}

.source-connect-icon.red {
  background-color: rgba(220, 38, 38, 0.08);
  color: var(--color-red);
}

.connect-badge.connected {
  background-color: rgba(16, 185, 129, 0.08);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.2);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
}

/* Step 2: Ask Question Styling */
.sim-question-box {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.2rem;
  background-color: #FFFFFF;
}

.question-header {
  background-color: #F8FAFC;
  padding: 0.6rem 1rem;
  font-size: 1.05rem;
  color: var(--color-text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-mono);
}

.question-text {
  padding: 1.2rem;
  font-size: 1.2rem;
  line-height: 1.5;
  color: var(--color-text);
  font-style: italic;
  font-family: var(--font-body);
}

.sim-console {
  background-color: #0F172A;
  border-radius: var(--radius-sm);
  padding: 1.2rem;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: #94A3B8;
  flex: 1;
  overflow-y: auto;
  line-height: 1.5;
}

/* Step 4: Verify Styling */
.sim-trace-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 280px;
  overflow-y: auto;
}

.sim-trace-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem;
}

.trace-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  font-family: var(--font-body);
}

.trace-number {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--color-blue);
  color: var(--color-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 600;
  flex-shrink: 0;
}

.trace-quote {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  background: #F8FAFC;
  padding: 0.8rem;
  border-left: 3px solid var(--color-gold);
  font-style: italic;
  border-radius: 4px;
}

.trace-sql {
  background: #0F172A;
  color: #38BDF8;
  padding: 0.8rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 1rem;
  margin: 0.5rem 0;
  overflow-x: auto;
}

/* Simulator Chat Layout */
.sim-chat-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sim-message-bot-thinking {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  margin-top: 0.5rem;
}

.thinking-dots {
  display: flex;
  gap: 4px;
  background-color: #FAF9F6;
  border: 1px solid var(--color-border);
  padding: 0.6rem 1rem;
  border-radius: 6px;
}

.thinking-dots span {
  width: 6px;
  height: 6px;
  background-color: var(--color-text-muted);
  border-radius: 50%;
  display: inline-block;
  animation: think-bounce 1.4s infinite ease-in-out both;
}

.thinking-dots span:nth-child(1) {
  animation-delay: -0.32s;
}

.thinking-dots span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes think-bounce {
  0%, 80%, 100% { 
    transform: scale(0); 
  }
  40% { 
    transform: scale(1); 
  }
}

/* Simulated Response Verification Modal Styling */
.sim-metadata-modal {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.sim-modal-header {
  padding: 0.8rem 1.2rem;
  border-bottom: 1px solid var(--color-border);
  background-color: #FFFFFF;
}

.sim-modal-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
  font-family: 'Lora', Georgia, serif;
}

.sim-modal-tabs {
  display: flex;
  background-color: #F8FAFC;
  border-bottom: 1px solid var(--color-border);
  padding: 0 0.8rem;
}

.sim-modal-tab {
  border: none;
  background: transparent;
  padding: 0.6rem 1rem;
  font-size: 1.05rem;
  font-weight: 550;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  font-family: var(--font-mono);
}

.sim-modal-tab.active {
  color: var(--color-blue);
  border-bottom-color: var(--color-blue);
}

.sim-modal-body {
  flex: 1;
  padding: 1.2rem;
  overflow-y: auto;
  background-color: #FFFFFF;
}

.sim-modal-panel {
  display: none;
}

.sim-modal-panel.active {
  display: block;
}

.section-subtitle-modal {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--color-text);
  font-family: var(--font-body);
}

.modal-citation-card {
  background-color: #F8FAFC;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem;
}

.citation-meta {
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.citation-quote {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--color-text-muted);
  border-left: 3px solid var(--color-gold);
  padding-left: 0.8rem;
}

.modal-sql-display {
  background-color: #0F172A;
  color: #38BDF8;
  padding: 1rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  margin-bottom: 1rem;
  overflow-x: auto;
  margin-top: 0;
}

.modal-table-wrapper {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
}

.modal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1.05rem;
}

.modal-table th, .modal-table td {
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 0.8rem;
  text-align: left;
}

.modal-table tr:last-child th, .modal-table tr:last-child td {
  border-bottom: none;
}

.modal-table th {
  background-color: #F8FAFC;
  font-weight: 600;
  color: var(--color-text-muted);
}

.modal-table td {
  color: var(--color-text);
}

/* Section 4: Traceability Visual Map */
.traceability-graphic {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem;
  box-shadow: var(--shadow-sm);
}

.trace-map-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  height: 100%;
  position: relative;
}

.trace-column {
  display: flex;
  flex-direction: column;
  gap: 2.8rem;
  justify-content: center;
  height: 100%;
  position: relative;
  z-index: 2;
}

.trace-column-center {
  justify-content: center;
}

.trace-node-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  z-index: 2;
  position: relative;
}

.trace-map-node {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.trace-map-node.node-blue {
  color: var(--color-blue);
  background-color: rgba(var(--color-blue-rgb), 0.04);
  border-color: rgba(var(--color-blue-rgb), 0.15);
}

.trace-map-node.node-gold {
  color: var(--color-gold);
  background-color: rgba(var(--color-gold-rgb), 0.04);
  border-color: rgba(var(--color-gold-rgb), 0.15);
}

.trace-map-node.node-green {
  color: #10B981;
  background-color: rgba(16, 185, 129, 0.04);
  border-color: rgba(16, 185, 129, 0.15);
}

.trace-node-wrapper:hover .trace-map-node {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.nexus-node-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.node-label {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  line-height: 1.3;
  font-weight: 550;
}

.trace-connector-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

@keyframes flow-dash {
  to {
    stroke-dashoffset: -28;
  }
}

.flowing-path-1, .flowing-path-2 {
  animation: flow-dash 1.2s infinite linear;
}

.traceability-copy-list {
  display: flex;
  flex-direction: column;
  gap: 3.2rem;
}

.trace-benefit h4 {
  font-size: 1.8rem;
  font-family: var(--font-heading);
  margin-bottom: 0.8rem;
  color: var(--color-text);
  font-weight: 500;
}

.trace-benefit p {
  font-size: 1.45rem;
  color: var(--color-text-muted);
}

/* Section 5: Capability Grid */
.capability-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  padding: 3.2rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s;
}

.capability-card:hover {
  background-color: #FFFFFF;
  border-color: rgba(var(--color-blue-rgb), 0.2);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.cap-header {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  margin-bottom: 1.6rem;
}

.cap-header svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-blue);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.capability-card:hover .cap-header svg {
  transform: scale(1.1);
}

.capability-card h3 {
  font-size: 1.8rem;
  font-weight: 500;
  font-family: var(--font-heading);
}

.capability-card p {
  color: var(--color-text-muted);
  font-size: 1.4rem;
  line-height: 1.5;
}

/* Section 6: Deployment Section */
.deployment-section {
  background-color: #FFFFFF;
}

.deployment-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.deployment-list li {
  position: relative;
  padding-left: 2rem;
  font-size: 1.45rem;
  color: var(--color-text-muted);
}

.deployment-list li strong {
  color: var(--color-text);
  display: block;
  margin-bottom: 0.4rem;
}

.deployment-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  background-color: var(--color-teal);
  border-radius: 50%;
  position: absolute;
  left: 0;
  top: 8px;
  box-shadow: 0 0 6px var(--color-teal);
}

.deployment-diagram-box {
  background-color: #FAF9F6;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 4rem;
  box-shadow: var(--shadow-sm);
}

.diagram-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.6rem;
  text-align: center;
  position: relative;
}

.diag-node {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.diag-node.source span {
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

.diag-connector {
  grid-column: span 1;
  height: 24px;
  position: relative;
}

.diag-connector.vertical::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  background-color: var(--color-border);
}

.diag-connector.single-vertical {
  grid-column: span 4;
  height: 24px;
  position: relative;
}

.diag-connector.single-vertical::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  background-color: var(--color-border);
}

.diag-bridge-layer {
  grid-column: span 4;
  background-color: rgba(var(--color-blue-rgb), 0.05);
  border: 1px solid rgba(var(--color-blue-rgb), 0.2);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  box-shadow: var(--shadow-sm);
}

.diag-bridge-layer strong {
  font-size: 1.4rem;
  color: var(--color-blue);
}

.diag-bridge-layer span {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.diag-app-layer {
  grid-column: span 4;
  background-color: rgba(var(--color-teal-rgb), 0.04);
  border: 1px solid rgba(var(--color-teal-rgb), 0.2);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.diag-app-layer strong {
  font-size: 1.4rem;
  color: var(--color-teal);
  display: block;
  margin-bottom: 0.4rem;
}

.diag-app-layer span {
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

/* Section 7: Final CTA Section */
.final-cta {
  padding: clamp(8rem, 12vw, 16rem) 0;
  background-image: radial-gradient(circle at center, rgba(var(--color-blue-rgb), 0.05) 0%, transparent 60%);
  background-color: #FFFFFF;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

/* Footer Styling */
footer {
  background-color: #FFFFFF;
  padding: 6.4rem 0 3.2rem;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 6.4rem;
  margin-bottom: 4.8rem;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 1.4rem;
  max-width: 320px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3.2rem;
}

.link-column h5 {
  font-size: 1.3rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: 2rem;
  font-weight: 600;
}

.link-column a {
  display: block;
  font-size: 1.35rem;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 1.2rem;
  transition: color 0.2s;
}

.link-column a:hover {
  color: var(--color-text);
}

.footer-bottom {
  padding-top: 3.2rem;
  display: flex;
  justify-content: space-between;
  font-size: 1.25rem;
  color: var(--color-text-muted);
}

/* Modal Overlay & Lead Form */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(17, 22, 37, 0.4);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

.modal-container {
  width: 90%;
  max-width: 580px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 4rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2.8rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1.6rem;
}

.modal-header h3 {
  font-size: 2.4rem;
  color: var(--color-text);
}

.close-modal-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 2.8rem;
  cursor: pointer;
  line-height: 1;
}

.form-group {
  margin-bottom: 2rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

label {
  display: block;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 0.8rem;
  font-weight: 550;
}

input[type="text"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 1.2rem 1.6rem;
  background-color: #F9FAFB;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1.4rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(var(--color-blue-rgb), 0.15);
  background-color: #FFFFFF;
}

option {
  background-color: #FFFFFF;
  color: var(--color-text);
}

.success-screen {
  padding: 2rem 0;
}

.success-check-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background-color: rgba(13, 148, 136, 0.1);
  border: 2px solid var(--color-teal);
  color: var(--color-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

/* Animations */
@keyframes scan-pulse {
  0% { transform: translateY(0); opacity: 0.3; }
  50% { transform: translateY(60px); opacity: 1; }
  100% { transform: translateY(0); opacity: 0.3; }
}

@keyframes flow-pulse {
  0% { transform: translateX(0); opacity: 0.5; }
  50% { transform: translateX(4px); opacity: 1; }
  100% { transform: translateX(0); opacity: 0.5; }
}

@keyframes line-pulse {
  0% { left: 0; }
  100% { left: 100%; }
}

/* Scroll reveal class (added via JS viewport entry) */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Native Scroll-driven Animations (Supported browsers) */
@media (prefers-reduced-motion: no-preference) {
  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    @keyframes section-reveal {
      from { opacity: 0; transform: translateY(30px); }
      to { opacity: 1; transform: translateY(0); }
    }
    
    .reveal-on-scroll {
      animation: section-reveal auto linear forwards;
      animation-timeline: view();
      animation-range: entry 10% entry 35%;
    }
  }
}

/* Accessibility - Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .scanner-bar, .flow-arrow, .pulse-bubble {
    animation: none !important;
  }
  .pulse-bubble {
    left: 50% !important;
  }
  .workspace-mockup {
    transform: none !important;
  }
}

/* Responsive Breakpoints */
@media (max-width: 991px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 4.8rem;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .workspace-mockup {
    height: 480px;
    transform: none;
  }
  
  .trace-map-container {
    flex-direction: column;
    gap: 2.4rem;
  }
  
  .trace-line-flow {
    width: 1px;
    height: 40px;
    flex: none;
  }
  
  .pulse-bubble {
    top: 0;
    left: -3px;
    animation: line-pulse-vertical 3s infinite linear;
  }
  
  @keyframes line-pulse-vertical {
    0% { top: 0; }
    100% { top: 100%; }
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 70px;
  }
  
  #desktop-nav, .nav-cta .btn {
    display: none;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .grid-2, .grid-3, .footer-grid, .footer-links {
    grid-template-columns: 1fr;
    gap: 3.2rem;
  }
  
  .footer-brand p {
    max-width: none;
  }
  
  .hero-actions, .cta-actions {
    flex-direction: column;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .modal-container {
    padding: 2.4rem;
  }
  
  .nexus-app-sidebar {
    display: none;
  }
  
  .diagram-grid {
    grid-template-columns: 1fr;
  }
  
  .diag-connector {
    display: none;
  }
  
  .diag-bridge-layer, .diag-app-layer {
    grid-column: span 1;
  }

  /* Traceability Map responsive swipe */
  .traceability-graphic {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    padding: 2rem 1.5rem;
  }
  
  .trace-map-container {
    min-width: 500px;
    height: 280px;
  }
  
  /* Mockup controls overflow prevention */
  .nexus-app-header {
    padding: 0 1rem;
  }
  
  .app-logo-text {
    font-size: 1.1rem;
    letter-spacing: 0.05em;
  }
  
  .app-user-profile {
    padding: 0.25rem 0.5rem;
    font-size: 1rem;
  }
}