/* 
 * TestLift - Premium Styling System (Stripe-like Aesthetic)
 * Designed by Antigravity
 */

/* ==========================================================================
   1. Import Fonts & Design Tokens
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  /* Color Palette */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8f9fc;
  --color-bg-tertiary: #f1f3f9;
  
  --color-text-primary: #0a2540;
  --color-text-secondary: #4f566b;
  --color-text-muted: #697386;
  
  --color-accent: #635bff; /* Stripe Indigo */
  --color-accent-hover: #564ee2;
  --color-accent-light: rgba(99, 91, 255, 0.08);
  
  --color-success: #00d46f;
  --color-success-light: rgba(0, 212, 111, 0.1);
  --color-warning: #ffb600;
  
  --color-border: #e3e8ee;
  --color-border-hover: #c1c9d2;
  
  /* Fonts */
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(50, 50, 93, 0.05), 0 1px 3px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 7px 14px rgba(50, 50, 93, 0.06), 0 3px 6px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 15px 35px rgba(50, 50, 93, 0.08), 0 5px 15px rgba(0, 0, 0, 0.06);
  --shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.05);
  
  /* Layout */
  --container-width: 1140px;
  --header-height: 80px;
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
}

/* ==========================================================================
   2. Reset & Global Styles
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   3. Typography & Utility Classes
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.text-gradient {
  background: linear-gradient(135deg, #0a2540 30%, #635bff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 100px;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-green {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border-hover);
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-alt {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  max-width: 680px;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 2.25rem;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   4. Header & Navigation (Stripe glassmorphism)
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--color-text-primary);
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #a370f7 100%);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.9rem;
  font-weight: 800;
}

.logo-text span {
  color: var(--color-accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.5vw, 24px);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(24px, 4vw, 60px);
  padding-right: clamp(24px, 4vw, 60px);
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

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

.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  margin: 5px 0;
  transition: all var(--transition-fast);
}

/* ==========================================================================
   5. Hero Section
   ========================================================================== */
.hero {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 100px;
  background: radial-gradient(circle at 80% 20%, rgba(99, 91, 255, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 10% 80%, rgba(0, 212, 111, 0.03) 0%, transparent 40%);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
}

.hero-graphic {
  position: relative;
  width: 100%;
  height: 380px;
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

/* Animated visual inside hero graphic representing Test / Control and Lift */
.hero-chart-container {
  flex-grow: 1;
  display: flex;
  align-items: flex-end;
  gap: 32px;
  padding: 40px 20px 20px 20px;
  position: relative;
}

.hero-chart-y-axis {
  position: absolute;
  left: 0;
  top: 40px;
  bottom: 20px;
  width: 1px;
  background-color: var(--color-border);
}

.hero-chart-bar-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  position: relative;
}

.hero-chart-bar {
  width: 100%;
  max-width: 80px;
  border-radius: 6px 6px 0 0;
  transition: height var(--transition-slow);
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.hero-chart-bar.control {
  height: 120px;
  background: linear-gradient(180deg, var(--color-border) 0%, #cbd5e1 100%);
}

.hero-chart-bar.test {
  height: 170px;
  background: linear-gradient(180deg, var(--color-accent) 0%, #a370f7 100%);
}

.hero-chart-bar-value {
  color: var(--color-text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 12px;
  position: absolute;
  top: -32px;
}

.hero-chart-bar-label {
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 12px;
  color: var(--color-text-muted);
}

.hero-chart-lift-marker {
  position: absolute;
  top: 10px;
  right: 20%;
  background-color: var(--color-success);
  color: white;
  padding: 4px 10px;
  border-radius: 100px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 4px 6px rgba(0, 212, 111, 0.2);
  display: flex;
  align-items: center;
  gap: 4px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* ==========================================================================
   6. Interactive Calculator Widget (Slide 8 Data)
   ========================================================================== */
.calculator-card {
  background: white;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
}

.calc-input-pane {
  padding: 48px;
  border-right: 1px solid var(--color-border);
}

.calc-input-pane h3 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.calc-input-pane p {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.calc-selector-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.calc-option {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 20px;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-option:hover {
  border-color: var(--color-border-hover);
  background-color: var(--color-bg-secondary);
}

.calc-option.active {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.calc-option-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text-primary);
}

.calc-option-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.calc-custom-slider {
  margin-bottom: 24px;
}

.calc-custom-slider label {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.calc-range {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--color-border);
  outline: none;
}

.calc-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
  transition: background var(--transition-fast);
}

.calc-range::-webkit-slider-thumb:hover {
  background: var(--color-accent-hover);
}

.calc-output-pane {
  padding: 48px;
  background-color: var(--color-bg-secondary);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calc-results-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.calc-result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.calc-result-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.calc-result-label {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.calc-result-title {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: 0.95rem;
}

.calc-result-desc {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  max-width: 180px;
}

.calc-result-val {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--color-accent);
  text-align: right;
  white-space: nowrap;
}

.calc-result-val.highlight {
  color: var(--color-success);
}

.calc-bottom-cta {
  margin-top: 32px;
}

.calc-bottom-cta p {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 12px;
}

/* ==========================================================================
   7. Problem & Solution Section (Causality vs Correlation)
   ========================================================================== */
.prob-sol-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.prob-cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.prob-card {
  background: white;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.prob-card.danger::before { background-color: #ff3b30; }
.prob-card.warning::before { background-color: var(--color-warning); }

.prob-card-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.prob-card.danger .prob-card-num { color: #ff3b30; }
.prob-card.warning .prob-card-num { color: var(--color-warning); }

.prob-card h4 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.prob-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.sol-details {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.sol-details h3 {
  font-size: 2.25rem;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.sol-details p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.sol-points {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sol-point {
  display: flex;
  gap: 16px;
}

.sol-point-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background-color: var(--color-success-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-success);
  font-size: 0.8rem;
  font-weight: 700;
}

.sol-point-text {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: 1rem;
}

.sol-point-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* ==========================================================================
   8. Process Section (9 Stages Timeline)
   ========================================================================== */
.timeline-tabs {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
  overflow-x: auto;
  padding-bottom: 4px;
  gap: 12px;
}

.timeline-tab {
  padding: 16px 8px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  transition: all var(--transition-fast);
}

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

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

.timeline-tab.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
}

.timeline-content-pane {
  background: white;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: 48px;
  min-height: 320px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.timeline-info h3 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.timeline-info p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.timeline-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  background-color: var(--color-bg-secondary);
  padding: 24px;
  border-radius: var(--border-radius-md);
}

.timeline-spec-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.timeline-spec-val {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text-primary);
}

.timeline-graphic {
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  height: 100%;
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--color-border);
  padding: 24px;
}

/* ==========================================================================
   9. Pricing Section
   ========================================================================== */
.pricing-grid {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.pricing-card {
  background: white;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  max-width: 680px;
  width: 100%;
  overflow: hidden;
  position: relative;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, #a370f7 100%);
}

.pricing-header {
  padding: 48px;
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  background-color: var(--color-bg-secondary);
}

.pricing-price {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 3.5rem;
  color: var(--color-text-primary);
  margin: 16px 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pricing-price span {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-left: 8px;
}

.pricing-body {
  padding: 48px;
}

.pricing-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.pricing-feature {
  display: flex;
  gap: 12px;
}

.pricing-feature-icon {
  flex-shrink: 0;
  color: var(--color-accent);
  font-size: 1rem;
}

.pricing-feature-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.pricing-note {
  background-color: var(--color-bg-tertiary);
  border-radius: var(--border-radius-md);
  padding: 20px;
  margin-bottom: 40px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.pricing-note strong {
  color: var(--color-text-primary);
}

.pricing-cta {
  text-align: center;
}

.pricing-cta .btn {
  width: 100%;
  max-width: 320px;
}

/* ==========================================================================
   10. About Us (Team of Geniuses)
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.about-image-wrapper img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.about-image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 32px;
  background: linear-gradient(180deg, transparent 0%, rgba(10, 37, 64, 0.95) 100%);
  color: white;
}

.about-image-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: #ffffff;
}

.about-image-title {
  font-size: 0.9rem;
  color: #80e9ff;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 4px;
}

.about-content h3 {
  font-size: 2.25rem;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.about-lead {
  font-size: 1.25rem;
  color: var(--color-text-primary);
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 24px;
}

.about-text {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.about-stat-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.about-stat-num {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2rem;
  color: var(--color-accent);
  line-height: 1;
}

.about-stat-desc h5 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.about-stat-desc p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   11. Contact Form & Leads Capture
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 60px;
}

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

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-top: 40px;
}

.contact-detail-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  background-color: var(--color-accent-light);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 1.2rem;
}

.contact-detail-text h5 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.contact-detail-text p {
  font-size: 1rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

.contact-detail-text a:hover {
  color: var(--color-accent);
}

.contact-card {
  background: white;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text-primary);
  background-color: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.15);
}

select.form-input {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%234f566b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  -webkit-appearance: none;
  appearance: none;
  padding-right: 40px;
}

textarea.form-input {
  resize: vertical;
  min-height: 120px;
}

.form-status {
  padding: 16px;
  border-radius: var(--border-radius-sm);
  margin-bottom: 24px;
  font-size: 0.9rem;
  display: none;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.form-status.success {
  background-color: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid rgba(0, 212, 111, 0.2);
  display: flex;
}

.form-status.error {
  background-color: rgba(255, 59, 48, 0.08);
  color: #ff3b30;
  border: 1px solid rgba(255, 59, 48, 0.2);
  display: flex;
}

/* ==========================================================================
   12. Footer Section
   ========================================================================== */
.footer {
  background-color: var(--color-text-primary);
  color: #cbd5e1;
  padding: 80px 0 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-logo {
  color: white;
  margin-bottom: 20px;
}

.footer-logo .logo-icon {
  background: white;
  color: var(--color-text-primary);
}

.footer-brand p {
  font-size: 0.95rem;
  max-width: 320px;
  color: #94a3b8;
}

.footer-links-title {
  color: white;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 24px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link a {
  font-size: 0.95rem;
  color: #94a3b8;
}

.footer-link a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #64748b;
}

/* ==========================================================================
   13. Responsive Styles (Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }
  
  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-ctas {
    justify-content: center;
  }
  
  .hero-graphic {
    max-width: 500px;
    margin: 0 auto;
    height: 340px;
  }
  
  .calculator-card {
    grid-template-columns: 1fr;
  }
  
  .calc-input-pane {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 36px;
  }
  
  .calc-output-pane {
    padding: 36px;
  }
  
  .prob-sol-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .about-image-wrapper img {
    height: 380px;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }
  
  .section {
    padding: 50px 0;
  }
  
  .hero-content h1 {
    font-size: clamp(2.0rem, 6vw, 2.5rem);
    line-height: 1.25;
  }
  
  .hero-content p {
    font-size: 1.1rem;
    margin-bottom: 32px;
  }
  
  .hero-ctas {
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 12px;
  }
  
  .hero-ctas .btn {
    width: 100%;
    max-width: 320px;
    text-align: center;
    justify-content: center;
  }
  
  .section-header h2 {
    font-size: 1.65rem;
  }
  
  .calc-selector-grid {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 24px;
  }
  
  .calc-option {
    padding: 16px;
  }
  
  .calc-input-pane, .calc-output-pane {
    padding: 24px;
  }
  
  .timeline-content-pane {
    grid-template-columns: 1fr;
    padding: 20px;
    gap: 20px;
  }
  
  .timeline-graphic {
    min-height: 180px;
  }
  
  .pricing-features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .pricing-header, .pricing-body {
    padding: 28px 24px;
  }
  
  .pricing-price {
    font-size: 2.75rem;
  }
  
  .pricing-price span {
    font-size: 1.1rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  /* Mobile Menu Styles */
  .mobile-nav-toggle {
    display: block;
    z-index: 1100;
  }
  
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: white;
    box-shadow: -10px 0 30px rgba(0,0,0,0.1);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 40px 40px 40px;
    gap: 24px;
    margin: 0;
    transition: right var(--transition-normal);
    z-index: 1050;
  }
  
  .nav.active {
    right: 0;
  }
  
  .header-cta {
    display: none;
  }
  
  /* Animate menu button when active */
  .mobile-nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  
  .mobile-nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .calc-input-pane, .calc-output-pane, .pricing-header, .pricing-body {
    padding: 20px 16px;
  }
  
  .prob-card {
    padding: 20px;
  }
  
  .timeline-content-pane {
    padding: 16px;
  }
}

/* ==========================================================================
   Geo Experiment Map Section
   ========================================================================== */
.geo-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  margin-top: 40px;
}

.geo-explain {
  display: flex;
  flex-direction: column;
}

.geo-explain h3 {
  font-size: 1.75rem;
  margin-bottom: 20px;
  color: var(--color-text-primary);
}

.geo-explain p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.geo-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 24px 0;
}

.geo-step-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  padding-left: 24px;
}

.geo-step-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  border-radius: var(--border-radius-md) 0 0 var(--border-radius-md);
}

.geo-step-card.test::before {
  background-color: var(--color-accent);
}

.geo-step-card.control::before {
  background-color: var(--color-text-muted);
}

.geo-step-badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border-radius: 4px;
  align-self: flex-start;
}

.geo-step-badge.test {
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}

.geo-step-badge.control {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

.geo-step-card p {
  font-size: 0.9rem;
  margin: 0;
}

.geo-map-container {
  display: flex;
  justify-content: center;
}

.geo-map-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  width: 100%;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.geo-map-header {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 16px;
}

.geo-map-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text-primary);
}

.geo-map-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.geo-map-svg-wrapper {
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius-md);
  border: 1px dashed var(--color-border);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lt-map-svg {
  width: 100%;
  height: auto;
  max-height: 350px;
}

.map-region {
  cursor: pointer;
  stroke: white;
  stroke-width: 3px;
  transition: all var(--transition-normal);
}

.map-region.test-group {
  fill: url(#grad-test);
}

.map-region.test-group:hover {
  fill: url(#grad-test-hover);
}

.map-region.control-group {
  fill: url(#grad-control);
}

.map-region.control-group:hover {
  fill: url(#grad-control-hover);
}

.map-label {
  pointer-events: none;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  fill: var(--color-text-primary);
  text-anchor: middle;
  transition: opacity var(--transition-fast);
}

.map-tooltip-box {
  background-color: var(--color-text-primary);
  color: white;
  padding: 16px;
  border-radius: var(--border-radius-md);
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 95px;
  transition: all var(--transition-fast);
}

.tooltip-region {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
}

.tooltip-status {
  font-weight: 600;
  color: #a370f7;
}

.tooltip-cities {
  font-size: 0.75rem;
  color: #94a3b8;
}

.map-legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.legend-dot.test {
  background-color: var(--color-accent);
}

.legend-dot.control {
  background-color: var(--color-text-muted);
}

@media (max-width: 1024px) {
  .geo-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .geo-map-card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .geo-map-card {
    padding: 20px 16px;
  }
}

/* SEO Links Footer Section */
.footer-seo-links {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
  font-size: 7px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  width: 100%;
}

.footer-seo-links a {
  color: #475569;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-seo-links a:hover {
  color: #94a3b8;
}

@media (max-width: 768px) {
  .footer-seo-links {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
  }
}