/* ============================================
   UnDHD Landing Site - Main Stylesheet
   Dark theme with cyan/orange accents
   ============================================ */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Colors - Dark Theme */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a24;
  --bg-card: rgba(18, 18, 26, 0.8);
  --bg-card-hover: rgba(26, 26, 36, 0.9);
  
  /* Accent Colors */
  --accent-primary: #06b6d4;
  --accent-primary-light: #22d3ee;
  --accent-primary-dark: #0891b2;
  --accent-cta: #f97316;
  --accent-cta-light: #fb923c;
  --accent-cta-dark: #ea580c;
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dimmed: #64748b;
  
  /* Status Colors */
  --success: #22c55e;
  --warning: #eab308;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Border Colors */
  --border-default: rgba(148, 163, 184, 0.1);
  --border-hover: rgba(148, 163, 184, 0.2);
  --border-accent: rgba(6, 182, 212, 0.3);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--accent-primary) 0%, #8b5cf6 100%);
  --gradient-cta: linear-gradient(135deg, var(--accent-cta) 0%, #f59e0b 100%);
  --gradient-dark: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.15) 0%, transparent 50%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px rgba(6, 182, 212, 0.3);
  --shadow-cta-glow: 0 0 30px rgba(249, 115, 22, 0.4);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: clamp(0.7rem, 0.8vw, 0.75rem);
  --font-size-sm: clamp(0.8rem, 0.9vw, 0.875rem);
  --font-size-base: clamp(0.9rem, 1vw, 1rem);
  --font-size-lg: clamp(1rem, 1.2vw, 1.125rem);
  --font-size-xl: clamp(1.1rem, 1.4vw, 1.25rem);
  --font-size-2xl: clamp(1.4rem, 2vw, 1.5rem);
  --font-size-3xl: clamp(1.8rem, 2.5vw, 1.875rem);
  --font-size-4xl: clamp(2rem, 3vw, 2.25rem);
  --font-size-5xl: clamp(2.5rem, 4vw, 3rem);
  --font-size-6xl: clamp(3rem, 5vw, 3.75rem);
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-tooltip: 400;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background gradient overlay */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: -1;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

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

h1 { font-size: var(--font-size-6xl); }
h2 { font-size: var(--font-size-5xl); }
h3 { font-size: var(--font-size-4xl); }
h4 { font-size: var(--font-size-3xl); }
h5 { font-size: var(--font-size-2xl); }
h6 { font-size: var(--font-size-xl); }

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-cta {
  background: var(--gradient-cta);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

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

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* ============================================
   Layout & Container
   ============================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-sm {
  max-width: 800px;
}

.container-lg {
  max-width: 1400px;
}

.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ============================================
   Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-4) 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-default);
  transition: var(--transition-base);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: var(--shadow-lg);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.navbar-brand .logo {
  width: 36px;
  height: 36px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: var(--transition-fast);
}

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

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Mobile Menu */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.navbar-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}

.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .navbar-toggle {
    display: flex;
  }
  
  .navbar-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    gap: var(--space-6);
    padding: var(--space-8);
    background: var(--bg-primary);
    transform: translateX(-100%);
    transition: var(--transition-base);
  }
  
  .navbar-nav.active {
    transform: translateX(0);
  }
  
  .navbar-actions {
    display: none;
  }
  
  .navbar-nav .btn {
    width: 100%;
    text-align: center;
  }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-cta);
  color: white;
  box-shadow: var(--shadow-md), var(--shadow-cta-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(249, 115, 22, 0.5);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}

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

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn-outline:hover {
  background: rgba(6, 182, 212, 0.1);
}

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

.btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-base);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
}

.btn-icon {
  padding: var(--space-3);
}

/* ============================================
   Cards
   ============================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition-base);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-glow:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
}

.card-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.card-description {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* Feature Card */
.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-base);
}

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

/* Pricing Card */
.pricing-card {
  text-align: center;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--accent-cta);
  transform: scale(1.05);
}

.pricing-card.featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-4);
  background: var(--gradient-cta);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
}

.pricing-price {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-4) 0;
}

.pricing-price span {
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-features {
  text-align: left;
  margin: var(--space-6) 0;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.pricing-feature svg {
  width: 18px;
  height: 18px;
  color: var(--success);
  flex-shrink: 0;
}

.pricing-feature.disabled {
  color: var(--text-dimmed);
}

.pricing-feature.disabled svg {
  color: var(--text-dimmed);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--accent-primary);
  margin-bottom: var(--space-6);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--text-muted);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
  margin-bottom: var(--space-8);
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  justify-content: center;
  font-size: var(--font-size-sm);
  color: var(--text-dimmed);
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hero-trust-item svg {
  width: 16px;
  height: 16px;
  color: var(--success);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-12);
}

.section-label {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
}

/* ============================================
   Problem Section
   ============================================ */
.problem-card {
  text-align: center;
  padding: var(--space-8);
}

.problem-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-xl);
  margin: 0 auto var(--space-4);
}

.problem-icon svg {
  width: 32px;
  height: 32px;
  color: var(--error);
}

/* Problem Row - 4 cards in one row */
.problem-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

@media (max-width: 1024px) {
  .problem-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .problem-row {
    grid-template-columns: 1fr;
  }
}

.problem-card-mini {
  background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  transition: var(--transition-base);
}

.problem-card-mini:hover {
  border-color: rgba(239, 68, 68, 0.4);
  transform: translateY(-2px);
}

.problem-icon-mini {
  width: 40px;
  height: 40px;
  background: rgba(239, 68, 68, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-3);
}

.problem-icon-mini svg {
  width: 20px;
  height: 20px;
  stroke: var(--error);
}

.problem-card-mini h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.problem-card-mini p {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  line-height: 1.5;
}

/* Solution Arrow - Animated */
.solution-arrow-wrapper {
  text-align: center;
  padding: var(--space-6) 0 0;
}

.solution-arrow {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--accent-primary);
  transition: var(--transition-base);
}

.solution-arrow:hover {
  color: var(--accent-primary-light);
}

.solution-arrow:hover .solution-arrow-icon {
  transform: translateY(4px);
}

.solution-arrow-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.solution-arrow-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
  animation: bounce-arrow 2s ease-in-out infinite;
}

.solution-arrow-icon svg {
  width: 24px;
  height: 24px;
  stroke: white;
}

@keyframes bounce-arrow {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(8px);
  }
}

/* ============================================
   Solution Section
   ============================================ */
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.solution-grid.reverse {
  direction: rtl;
}

.solution-grid.reverse > * {
  direction: ltr;
}

.solution-content {
  max-width: 500px;
}

.solution-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
}

.solution-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-4);
}

.solution-description {
  margin-bottom: var(--space-6);
}

.solution-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
}

@media (max-width: 968px) {
  .solution-grid,
  .solution-grid.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }
}

/* ============================================
   Stats Section
   ============================================ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.stat-card {
  text-align: center;
  padding: var(--space-6);
}

.stat-value {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   Testimonials
   ============================================ */
.testimonial-card {
  padding: var(--space-8);
}

.testimonial-content {
  font-size: var(--font-size-lg);
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  position: relative;
}

.testimonial-content::before {
  content: '"';
  position: absolute;
  top: -20px;
  left: -10px;
  font-size: 80px;
  font-family: Georgia, serif;
  color: var(--accent-primary);
  opacity: 0.3;
  line-height: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: white;
}

.testimonial-name {
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial-role {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

/* ============================================
   FAQ Accordion
   ============================================ */
.faq-item {
  border-bottom: 1px solid var(--border-default);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6) 0;
  background: none;
  border: none;
  text-align: left;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.faq-question:hover {
  color: var(--accent-primary);
}

.faq-question svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding-bottom: var(--space-6);
  color: var(--text-muted);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--space-16);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at top, rgba(249, 115, 22, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.cta-title {
  margin-bottom: var(--space-4);
}

.cta-description {
  font-size: var(--font-size-lg);
  color: var(--text-muted);
  margin-bottom: var(--space-8);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--border-default);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .navbar-brand {
  margin-bottom: var(--space-4);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.footer-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-default);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.footer-social a:hover {
  background: var(--accent-primary);
  color: white;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-brand {
    grid-column: 1 / -1;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* ============================================
   Contact Form
   ============================================ */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-dimmed);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  font-size: var(--font-size-sm);
  color: var(--error);
  margin-top: var(--space-2);
}

/* ============================================
   Sticky CTA Bar
   ============================================ */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-4);
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-default);
  transform: translateY(100%);
  transition: var(--transition-base);
}

.sticky-cta.visible {
  transform: translateY(0);
}

.sticky-cta .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.sticky-cta-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.sticky-cta-text strong {
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .sticky-cta .container {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

.float {
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Stale task indicator animation */
.stale-indicator {
  animation: stale-pulse 2s ease-in-out infinite;
}

@keyframes stale-pulse {
  0%, 100% { 
    border-color: var(--warning);
    box-shadow: 0 0 0 0 rgba(234, 179, 8, 0.4);
  }
  50% { 
    border-color: var(--error);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }

.mx-auto { margin-left: auto; margin-right: auto; }

.w-full { width: 100%; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }

/* ============================================
   Page-Specific Styles
   ============================================ */

/* Features Page Hero */
.page-hero {
  padding: 160px 0 var(--space-16);
  text-align: center;
}

.page-hero-title {
  margin-bottom: var(--space-4);
}

.page-hero-description {
  font-size: var(--font-size-xl);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Feature Detail Cards */
.feature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--border-default);
}

.feature-detail:last-child {
  border-bottom: none;
}

.feature-detail:nth-child(even) {
  direction: rtl;
}

.feature-detail:nth-child(even) > * {
  direction: ltr;
}

.feature-detail-content h3 {
  margin-bottom: var(--space-4);
}

.feature-detail-content p {
  margin-bottom: var(--space-6);
}

.feature-detail-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 968px) {
  .feature-detail,
  .feature-detail:nth-child(even) {
    grid-template-columns: 1fr;
    direction: ltr;
  }
}

/* Pricing Page Specific */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  align-items: start;
}

@media (max-width: 968px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }
  
  .pricing-card.featured {
    transform: none;
    order: -1;
  }
}

/* Contact Page */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
}

.contact-info {
  padding: var(--space-8);
}

.contact-info-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-info-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6, 182, 212, 0.1);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 24px;
  height: 24px;
  color: var(--accent-primary);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Demo/Mockup Components
   ============================================ */
.mockup-task {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  border-left: 3px solid var(--border-default);
}

.mockup-task.warning {
  border-left-color: var(--warning);
  background: rgba(234, 179, 8, 0.05);
}

.mockup-task.critical {
  border-left-color: var(--error);
  background: rgba(239, 68, 68, 0.05);
}

.mockup-task-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mockup-checkbox {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-hover);
  border-radius: var(--radius-sm);
}

.mockup-task-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.mockup-badge {
  padding: var(--space-1) var(--space-2);
  background: rgba(239, 68, 68, 0.2);
  color: var(--error);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-left: auto;
}

.mockup-badge.warning {
  background: rgba(234, 179, 8, 0.2);
  color: var(--warning);
}

/* Hierarchy Diagram */
.hierarchy-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.hierarchy-node {
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: center;
}

.hierarchy-node.rock {
  background: var(--gradient-primary);
  color: white;
}

.hierarchy-node.problem {
  background: rgba(139, 92, 246, 0.2);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #a78bfa;
}

.hierarchy-node.task {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-default);
}

.hierarchy-connector {
  width: 2px;
  height: 20px;
  background: var(--border-hover);
}