/* ==========================================================================
   HeartSim AI® — Global Styles & Design System
   Enterprise Biotech / Life Sciences In Silico Electro-Physiology Platform
   ========================================================================== */

:root {
  /* Color Palette */
  --color-navy-950: #050B14;
  --color-navy-900: #0A1322;
  --color-navy-850: #0E1B2E;
  --color-navy-800: #14253E;
  --color-navy-700: #1E375A;
  
  --color-cyan-400: #38BDF8;
  --color-cyan-500: #00B4D8;
  --color-cyan-glow: #00D2FF;
  --color-cyan-soft: rgba(0, 210, 255, 0.12);
  
  --color-blue-600: #2563EB;
  --color-blue-500: #3B82F6;
  --color-blue-900: #1E3A8A;
  
  --color-emerald-400: #34D399;
  --color-emerald-500: #10B981;
  --color-emerald-900: rgba(16, 185, 129, 0.15);
  
  --color-amber-400: #FBBF24;
  --color-amber-500: #F59E0B;
  --color-amber-900: rgba(245, 158, 11, 0.15);
  
  --color-rose-400: #F87171;
  --color-rose-500: #EF4444;
  --color-rose-900: rgba(239, 68, 68, 0.15);

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-accent: #38BDF8;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  --border-cyan: rgba(0, 210, 255, 0.35);

  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-cyan-glow: 0 0 25px rgba(0, 210, 255, 0.2);
  --shadow-cyan-strong: 0 0 45px rgba(0, 210, 255, 0.35);

  --container-max-w: 1240px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--color-navy-950);
  color: var(--text-primary);
  font-family: var(--font-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% -20%, #102642 0%, var(--color-navy-950) 65%);
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

code, pre, .font-mono {
  font-family: var(--font-mono);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.8rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #00B4D8 0%, #0077B6 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 20px rgba(0, 180, 216, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 210, 255, 0.5);
  background: linear-gradient(135deg, #00D2FF 0%, #0096C7 100%);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-cyan-glow);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.btn-sm {
  padding: 0.55rem 1.1rem;
  font-size: 0.85rem;
}

.btn-icon {
  width: 1.1em;
  height: 1.1em;
}

/* Badge System */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-glow {
  background: var(--color-cyan-soft);
  color: var(--color-cyan-400);
  border: 1px solid var(--border-cyan);
  box-shadow: 0 0 15px rgba(0, 210, 255, 0.15);
}

.badge-emerald {
  background: var(--color-emerald-900);
  color: var(--color-emerald-400);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-amber {
  background: var(--color-amber-900);
  color: var(--color-amber-400);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-rose {
  background: var(--color-rose-900);
  color: var(--color-rose-400);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-swiss {
  background: rgba(220, 38, 38, 0.12);
  color: #F87171;
  border: 1px solid rgba(220, 38, 38, 0.3);
}

/* Section Header Shared */
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-cyan-400);
  margin-bottom: 0.8rem;
  display: inline-block;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
}

.section-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

/* Grid & Card Styles */
.card {
  background: var(--color-navy-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-cyan-glow);
}

/* ==========================================================================
   1. NAVIGATION BAR
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(7, 15, 29, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(5, 11, 20, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #FFFFFF;
}

.logo-icon-wrapper {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.2), rgba(37, 99, 235, 0.3));
  border: 1px solid var(--color-cyan-500);
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
}

.brand-text {
  background: linear-gradient(120deg, #FFFFFF 60%, var(--color-cyan-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-reg {
  font-size: 0.65em;
  vertical-align: super;
  font-weight: 400;
  color: var(--color-cyan-400);
  -webkit-text-fill-color: var(--color-cyan-400);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.4rem 0;
}

.nav-link:hover {
  color: #FFFFFF;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-cyan-glow);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* Language Selector Dropdown */
.lang-selector-wrapper {
  position: relative;
  display: inline-block;
}

.lang-selector-btn {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.45rem 0.85rem;
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-selector-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-cyan-glow);
}

.lang-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: #0A1424;
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  min-width: 165px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 210, 255, 0.15);
  z-index: 1100;
  overflow: hidden;
}

.lang-dropdown-menu.active {
  display: block;
  animation: fadeInDown 0.15s ease-out;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.lang-option-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.6rem 0.95rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-option-item:hover, .lang-option-item.active {
  background: rgba(0, 210, 255, 0.12);
  color: #FFFFFF;
}

.lang-flag-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-code-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-cyan-400);
}

.badge-stealth {
  background: rgba(168, 85, 247, 0.15);
  color: #C084FC;
  border: 1px solid rgba(168, 85, 247, 0.35);
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.2);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}



/* ==========================================================================
   2. HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding-top: 150px;
  padding-bottom: 90px;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(0, 180, 216, 0.15) 0%, rgba(10, 25, 47, 0) 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.hero-tagline-wrap {
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #FFFFFF 20%, #38BDF8 60%, #00B4D8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 820px;
  margin: 0 auto 2.5rem auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

/* Hero Compliance Badges Grid */
.hero-badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
  text-align: left;
}

.hero-badge-card {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  background: rgba(14, 27, 46, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  backdrop-filter: blur(8px);
}

.hero-badge-card:hover {
  border-color: var(--border-cyan);
  background: rgba(20, 37, 62, 0.8);
}

.hero-badge-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-cyan-400);
  margin-top: 2px;
}

.hero-badge-card.success .hero-badge-icon {
  color: var(--color-emerald-400);
}

.hero-badge-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.hero-badge-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Hero Live Interactive Electrophysiology Mockup */
.hero-simulation-preview {
  margin-top: 4.5rem;
  background: linear-gradient(180deg, rgba(20, 37, 62, 0.9) 0%, rgba(10, 19, 34, 0.95) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-cyan-strong), var(--shadow-card);
  position: relative;
  z-index: 2;
}

.simulation-window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.window-dots {
  display: flex;
  gap: 0.45rem;
}

.window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--border-medium);
}

.window-dot.red { background: #EF4444; }
.window-dot.yellow { background: #F59E0B; }
.window-dot.green { background: #10B981; }

.window-title {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--color-cyan-400);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.window-pills {
  display: flex;
  gap: 0.5rem;
}

.sim-switcher {
  display: flex;
  background: rgba(5, 11, 20, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  gap: 0.25rem;
}

.sim-switch-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sim-switch-btn.active {
  background: var(--color-cyan-500);
  color: #FFFFFF;
  box-shadow: 0 0 10px rgba(0, 210, 255, 0.4);
}

.sim-body-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 1.5rem;
  align-items: center;
}

.sim-graph-canvas-wrap {
  position: relative;
  background: rgba(5, 11, 20, 0.95);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.graph-legend {
  display: flex;
  gap: 1.25rem;
  font-size: 0.75rem;
  margin-bottom: 0.5rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-color {
  width: 14px;
  height: 3px;
  border-radius: 2px;
}

.legend-color.baseline { background: #64748B; }
.legend-color.drug { background: var(--color-cyan-glow); }

#actionPotentialCanvas {
  width: 100%;
  height: 210px;
  display: block;
}

.sim-metrics-panel {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.sim-metric-box {
  background: rgba(14, 27, 46, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.25rem;
}

.metric-name {
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
}

.metric-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   3. THE PARADOX VS THE SOLUTION (PROBLEM VS BREAKTHROUGH)
   ========================================================================== */
.paradox-section {
  padding: 100px 0;
  position: relative;
  background: linear-gradient(180deg, var(--color-navy-950) 0%, #0A1628 50%, var(--color-navy-950) 100%);
}

.paradox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.paradox-card {
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  position: relative;
}

.paradox-card.old-way {
  background: linear-gradient(145deg, rgba(30, 20, 25, 0.5) 0%, rgba(14, 27, 46, 0.6) 100%);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.paradox-card.new-way {
  background: linear-gradient(145deg, rgba(16, 40, 60, 0.7) 0%, rgba(14, 27, 46, 0.9) 100%);
  border: 1px solid var(--border-cyan);
  box-shadow: var(--shadow-cyan-glow);
}

.paradox-badge-top {
  margin-bottom: 1.25rem;
}

.paradox-card-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.paradox-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-top: 1.5rem;
}

.paradox-list-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.paradox-icon-bullet {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  font-size: 0.75rem;
  font-weight: 800;
}

.old-way .paradox-icon-bullet {
  background: var(--color-rose-900);
  color: var(--color-rose-400);
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.new-way .paradox-icon-bullet {
  background: var(--color-emerald-900);
  color: var(--color-emerald-400);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

/* Callout Box inside Paradox */
.verapamil-callout {
  margin-top: 2rem;
  background: rgba(5, 11, 20, 0.65);
  border-left: 3px solid var(--color-cyan-glow);
  padding: 1.2rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.callout-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-cyan-400);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.callout-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   4. COMPUTATIONAL WORKFLOW (4 STEPS)
   ========================================================================== */
.workflow-section {
  padding: 100px 0;
  position: relative;
}

.workflow-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  margin-top: 3.5rem;
}

.workflow-step-card {
  background: var(--color-navy-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.8rem 1.4rem;
  position: relative;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.workflow-step-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-cyan);
  box-shadow: 0 10px 30px rgba(0, 210, 255, 0.2);
}

.step-number-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-cyan-400);
  background: var(--color-cyan-soft);
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  width: fit-content;
}

.step-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(30, 58, 138, 0.4);
  border: 1px solid var(--color-blue-500);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-cyan-400);
}

.step-title {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.step-badge-specs {
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.85rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-emerald-400);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ==========================================================================
   5. SCIENTIFIC VALIDATION & REGULATORY BENCHMARK
   ========================================================================== */
.validation-section {
  padding: 100px 0;
  background: #060D1A;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.benchmark-table-wrapper {
  background: var(--color-navy-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  margin-bottom: 3.5rem;
}

.table-toolbar {
  padding: 1.25rem 1.75rem;
  background: rgba(14, 27, 46, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.table-toolbar-title {
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.table-filter-tabs {
  display: flex;
  gap: 0.5rem;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.78rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn.active, .filter-btn:hover {
  background: var(--color-blue-600);
  color: #FFFFFF;
  border-color: var(--color-blue-500);
}

.responsive-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.responsive-table th {
  background: rgba(10, 19, 34, 0.9);
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 1rem 1.25rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-subtle);
}

.responsive-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  vertical-align: middle;
}

.responsive-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.drug-name {
  font-weight: 700;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.drug-tag-note {
  font-size: 0.72rem;
  color: var(--color-cyan-400);
  background: var(--color-cyan-soft);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.mono-cell {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* OECD 5 Principles Grid */
.oecd-title-wrap {
  text-align: center;
  margin-bottom: 2.5rem;
}

.oecd-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.oecd-card {
  background: var(--color-navy-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-normal);
}

.oecd-card:hover {
  border-color: var(--color-emerald-400);
  transform: translateY(-3px);
}

.oecd-principle-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-emerald-400);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.oecd-principle-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #FFFFFF;
}

.oecd-principle-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Desk Audit QMRF Banner */
.qmrf-banner {
  background: linear-gradient(135deg, rgba(14, 27, 46, 0.95), rgba(20, 37, 62, 0.8));
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.qmrf-content {
  max-width: 750px;
}

.qmrf-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.qmrf-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   6. INDUSTRY SOLUTIONS (3 TIERS)
   ========================================================================== */
.solutions-section {
  padding: 100px 0;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3.5rem;
}

.solution-card {
  background: var(--color-navy-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.solution-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-cyan-glow);
}

.solution-tag-role {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-cyan-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.solution-target-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.solution-headline {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.55;
}

.solution-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.solution-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.solution-feature-item svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-cyan-400);
  margin-top: 2px;
}

/* ==========================================================================
   7. AIR-GAPPED DEPLOYMENT & IP SAFETY
   ========================================================================== */
.security-section {
  padding: 90px 0;
  background: linear-gradient(180deg, var(--color-navy-950) 0%, #071322 100%);
  position: relative;
}

.security-box {
  background: linear-gradient(135deg, rgba(14, 27, 46, 0.95) 0%, rgba(20, 37, 62, 0.6) 100%);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: var(--shadow-cyan-glow);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: center;
}

.security-specs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.security-spec-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.security-spec-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(0, 210, 255, 0.1);
  border: 1px solid var(--border-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-cyan-glow);
  flex-shrink: 0;
}

.security-spec-heading {
  font-size: 1rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 0.2rem;
}

.security-spec-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.terminal-mockup {
  background: #02060D;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #A7F3D0;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.8);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 0.8rem;
  color: var(--text-muted);
}

.terminal-line {
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.terminal-prompt {
  color: var(--color-cyan-400);
}

.terminal-highlight {
  color: #FFFFFF;
  font-weight: 700;
}

/* ==========================================================================
   8. CONTACT & REQUEST A PILOT FORM
   ========================================================================== */
.contact-section {
  padding: 100px 0;
  position: relative;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 3.5rem;
}

.contact-info-col {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin: 2rem 0;
}

.contact-benefit-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.contact-benefit-item svg {
  color: var(--color-emerald-400);
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.swiss-headquarters-badge {
  background: rgba(14, 27, 46, 0.8);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.swiss-flag-icon {
  width: 38px;
  height: 38px;
  background: #DC2626;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 900;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.swiss-info-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.swiss-info-text strong {
  color: #FFFFFF;
  display: block;
  font-size: 0.95rem;
}

/* Pilot Form Styling */
.pilot-form-card {
  background: var(--color-navy-850);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
}

.form-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-label .required {
  color: var(--color-rose-400);
}

.form-control {
  background: rgba(5, 11, 20, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: #FFFFFF;
  font-size: 0.92rem;
  font-family: var(--font-main);
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-cyan-glow);
  box-shadow: 0 0 10px rgba(0, 210, 255, 0.25);
  background: rgba(5, 11, 20, 0.95);
}

.form-control::placeholder {
  color: var(--text-muted);
}

textarea.form-control {
  min-height: 110px;
  resize: vertical;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.custom-checkbox {
  margin-top: 3px;
  accent-color: var(--color-cyan-500);
  width: 17px;
  height: 17px;
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  cursor: pointer;
}

.form-submit-alert {
  display: none;
  padding: 1rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  margin-top: 1rem;
}

.form-submit-alert.success {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-emerald-900);
  border: 1px solid var(--color-emerald-500);
  color: #A7F3D0;
}

/* ==========================================================================
   9. INSTITUTIONAL FOOTER
   ========================================================================== */
.site-footer {
  background: #03070E;
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px 0;
  font-size: 0.88rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand-col {
  max-width: 360px;
}

.footer-desc {
  margin: 1rem 0 1.5rem 0;
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 0.85rem;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--text-muted);
  transition: color var(--transition-fast);
  font-size: 0.85rem;
}

.footer-link:hover {
  color: var(--color-cyan-400);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-legal-note {
  max-width: 600px;
}

/* Modal styles for Executive Summary & Demo */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(3, 7, 14, 0.8);
  backdrop-filter: blur(10px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-box {
  background: var(--color-navy-850);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  padding: 2.5rem;
  position: relative;
  box-shadow: var(--shadow-cyan-strong);
  animation: modalIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close-btn:hover {
  color: #FFFFFF;
}

/* ==========================================================================
   RESPONSIVE DESIGN (BREAKPOINTS)
   ========================================================================== */
@media (max-width: 1024px) {
  .workflow-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  .security-box {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions .btn {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--color-navy-900);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.5rem;
    gap: 1.25rem;
  }
  .hero-section {
    padding-top: 120px;
  }
  .paradox-grid {
    grid-template-columns: 1fr;
  }
  .workflow-steps-grid {
    grid-template-columns: 1fr;
  }
  .sim-body-grid {
    grid-template-columns: 1fr;
  }
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .form-grid-2col {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
  }
  .responsive-table th, .responsive-table td {
    padding: 0.75rem 0.6rem;
    font-size: 0.78rem;
  }
}