/* =============================================
   Resonance - Marketing Website Styles
   Matching App Theme: Dark + Cyan Accent
   ============================================= */

/* CSS Variables - Matching App Theme */
:root {
  --color-primary: #00D4E6;
  --color-primary-dim: rgba(0, 212, 230, 0.1);
  --color-primary-glow: rgba(0, 212, 230, 0.3);
  --color-primary-intense: rgba(0, 212, 230, 0.5);
  --color-background: #0D1117;
  --color-background-alt: #0A0E13;
  --color-surface: #161B22;
  --color-surface-elevated: #1C2128;
  --color-surface-hover: #21262D;
  --color-text-primary: #F0F6FC;
  --color-text-secondary: #8B949E;
  --color-text-muted: #6E7681;
  --color-border: #30363D;
  --color-border-subtle: #21262D;

  /* Technique Categories */
  --color-coherence: #00D4E6;
  --color-focus: #FFB347;
  --color-stress-relief: #FF6B9D;
  --color-sleep: #9B6DFF;
  --color-energy: #FFF347;
  --color-custom: #7EE787;

  /* Breathing Phases */
  --color-inhale: #00D4E6;
  --color-hold: #9B6DFF;
  --color-exhale: #7EE787;

  /* Gamification Tiers */
  --color-bronze: #CD7F32;
  --color-silver: #C0C0C0;
  --color-gold: #FFD700;
  --color-platinum: #E5E4E2;
  --color-diamond: #85D4FF;

  /* Streak Fire */
  --gradient-fire: linear-gradient(to top, #FF3D3D, #FF6B35, #FFD93D);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-glow: 0 0 60px var(--color-primary-glow);
  --shadow-glow-intense: 0 0 100px var(--color-primary-intense);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.6);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Header height */
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a:hover {
  opacity: 0.85;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(3rem, 6vw, 5rem);
  letter-spacing: -0.03em;
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

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

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

/* =============================================
   Site Header (Navigation)
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-normal);
}

.site-header.scrolled::before {
  border-bottom-color: var(--color-border-subtle);
}

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

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  z-index: 1001;
}

.header-logo:hover {
  opacity: 1;
}

.header-logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-primary);
}

.header-logo-icon .mini-core {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--color-primary), rgba(0, 212, 230, 0.6));
  animation: breatheCore 4s ease-in-out infinite;
}

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

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-primary);
  opacity: 1;
}

.nav-cta {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: var(--color-background);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
  transition: all var(--transition-normal);
}

.nav-cta:hover {
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--color-primary-glow);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 1001;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition-normal);
  border-radius: 2px;
}

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

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

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

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(13, 17, 23, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-2xl);
  z-index: 999;
  opacity: 0;
  transform: translateY(-20px);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.mobile-nav.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.mobile-nav-links a {
  display: block;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  font-weight: 600;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.mobile-nav .nav-cta {
  display: inline-block;
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-4xl);
  position: relative;
  overflow: hidden;
}

/* Background Effects */
.hero-bg-effects {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 1000px;
  background: radial-gradient(
    ellipse at center,
    var(--color-primary-glow) 0%,
    rgba(0, 212, 230, 0.15) 30%,
    transparent 70%
  );
  opacity: 0.6;
  animation: glowPulse 8s ease-in-out infinite;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  opacity: 0.4;
}

/* Floating Particles */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  opacity: 0.6;
  animation: floatParticle 15s ease-in-out infinite;
}

.particle:nth-child(1) { background: var(--color-coherence); left: 10%; top: 20%; animation-delay: 0s; }
.particle:nth-child(2) { background: var(--color-focus); left: 20%; top: 60%; animation-delay: 2s; }
.particle:nth-child(3) { background: var(--color-stress-relief); left: 80%; top: 30%; animation-delay: 4s; }
.particle:nth-child(4) { background: var(--color-sleep); left: 70%; top: 70%; animation-delay: 6s; }
.particle:nth-child(5) { background: var(--color-energy); left: 90%; top: 50%; animation-delay: 8s; }
.particle:nth-child(6) { background: var(--color-custom); left: 5%; top: 80%; animation-delay: 10s; }

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

/* Enhanced Breathing Logo with Rainbow Ring */
.logo-container {
  margin-bottom: var(--space-2xl);
  animation: fadeInDown 1s ease-out;
}

.breathing-logo {
  width: 180px;
  height: 180px;
  margin: 0 auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Rainbow Ring */
.rainbow-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    var(--color-coherence),
    var(--color-focus),
    var(--color-stress-relief),
    var(--color-sleep),
    var(--color-energy),
    var(--color-custom),
    var(--color-coherence)
  );
  mask: radial-gradient(transparent 68%, black 70%, black 100%);
  -webkit-mask: radial-gradient(transparent 68%, black 70%, black 100%);
  animation: rainbowSpin 20s linear infinite;
  opacity: 0.8;
}

.breathing-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  opacity: 0.3;
}

.breathing-ring.ring-1 {
  width: 85%;
  height: 85%;
  animation: breatheRing 4s ease-in-out infinite;
}

.breathing-ring.ring-2 {
  width: 65%;
  height: 65%;
  animation: breatheRing 4s ease-in-out infinite 0.5s;
}

.breathing-ring.ring-3 {
  width: 45%;
  height: 45%;
  animation: breatheRing 4s ease-in-out infinite 1s;
}

/* Phase-Aware Breathing Core */
.breathing-core {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: radial-gradient(
    circle at 30% 30%,
    var(--color-primary),
    rgba(0, 212, 230, 0.6)
  );
  box-shadow:
    0 0 40px var(--color-primary-glow),
    0 0 80px var(--color-primary-dim),
    inset 0 -10px 20px rgba(0, 0, 0, 0.3);
  animation: breatheWithPhases 12s ease-in-out infinite;
}

.hero-title {
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.8s ease-out 0.3s both;
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.8s ease-out 0.5s both;
  font-weight: 500;
}

.hero-description {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s ease-out 0.7s both;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* Store Buttons */
.store-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.9s both;
}

.store-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-elevated) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-weight: 500;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.store-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary-dim) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.store-button:hover {
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), 0 0 30px var(--color-primary-dim);
  opacity: 1;
}

.store-button:hover::before {
  opacity: 1;
}

.store-button.primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, rgba(0, 180, 200, 1) 100%);
  border-color: transparent;
  color: var(--color-background);
}

.store-button.primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.store-button svg {
  width: 28px;
  height: 28px;
  position: relative;
  z-index: 1;
}

.store-button span {
  text-align: left;
  position: relative;
  z-index: 1;
}

.store-button .store-label {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.store-button.primary .store-label {
  color: rgba(13, 17, 23, 0.7);
}

.store-button .store-name {
  font-size: 1.125rem;
  font-weight: 600;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  animation: fadeInUp 1s ease-out 1.2s both;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
  animation: scrollBounce 2s ease-in-out infinite;
}

/* =============================================
   App Preview Section
   ============================================= */
.app-preview {
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
}

.app-preview-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4xl);
}

.preview-content {
  flex: 1;
  max-width: 480px;
}

.preview-content h2 {
  margin-bottom: var(--space-lg);
}

.preview-content p {
  font-size: 1.125rem;
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.preview-features {
  list-style: none;
}

.preview-features li {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.preview-features li::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* CSS iPhone Mockup */
.device-frame {
  position: relative;
  width: 280px;
  height: 580px;
  background: linear-gradient(135deg, #1C2128 0%, #0D1117 100%);
  border-radius: 50px;
  padding: 14px;
  box-shadow:
    0 0 0 3px #30363D,
    0 30px 60px rgba(0, 0, 0, 0.5),
    0 0 100px var(--color-primary-dim);
  flex-shrink: 0;
}

.device-frame::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 28px;
  background: #0D1117;
  border-radius: 20px;
  z-index: 10;
}

.device-screen {
  width: 100%;
  height: 100%;
  background: var(--color-background);
  border-radius: 38px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.device-screen-content {
  text-align: center;
  padding: var(--space-xl);
}

.device-breathing-circle {
  width: 140px;
  height: 140px;
  margin: 0 auto var(--space-xl);
  border-radius: 50%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.device-breathing-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 3px solid;
  animation: breatheWithPhases 12s ease-in-out infinite;
  opacity: 0.4;
}

.device-breathing-core {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  animation: breatheWithPhases 12s ease-in-out infinite;
}

.device-phase-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  animation: phaseText 12s ease-in-out infinite;
}

.device-timer {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-top: var(--space-sm);
}

/* =============================================
   Categories Section
   ============================================= */
.categories {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, var(--color-background) 0%, var(--color-surface) 50%, var(--color-background) 100%);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-3xl);
}

.category-card {
  position: relative;
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.category-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.category-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-border);
}

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

/* Category-specific colors */
.category-card.coherence::before { background: radial-gradient(ellipse at center, rgba(0, 212, 230, 0.15) 0%, transparent 70%); }
.category-card.focus::before { background: radial-gradient(ellipse at center, rgba(255, 179, 71, 0.15) 0%, transparent 70%); }
.category-card.stress-relief::before { background: radial-gradient(ellipse at center, rgba(255, 107, 157, 0.15) 0%, transparent 70%); }
.category-card.sleep::before { background: radial-gradient(ellipse at center, rgba(155, 109, 255, 0.15) 0%, transparent 70%); }
.category-card.energy::before { background: radial-gradient(ellipse at center, rgba(255, 243, 71, 0.15) 0%, transparent 70%); }
.category-card.custom::before { background: radial-gradient(ellipse at center, rgba(126, 231, 135, 0.15) 0%, transparent 70%); }

.category-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  transition: all var(--transition-normal);
}

.category-card.coherence .category-icon { background: rgba(0, 212, 230, 0.15); color: var(--color-coherence); }
.category-card.focus .category-icon { background: rgba(255, 179, 71, 0.15); color: var(--color-focus); }
.category-card.stress-relief .category-icon { background: rgba(255, 107, 157, 0.15); color: var(--color-stress-relief); }
.category-card.sleep .category-icon { background: rgba(155, 109, 255, 0.15); color: var(--color-sleep); }
.category-card.energy .category-icon { background: rgba(255, 243, 71, 0.15); color: var(--color-energy); }
.category-card.custom .category-icon { background: rgba(126, 231, 135, 0.15); color: var(--color-custom); }

.category-card:hover .category-icon {
  transform: scale(1.1);
}

.category-card.coherence:hover .category-icon { box-shadow: 0 0 30px rgba(0, 212, 230, 0.3); }
.category-card.focus:hover .category-icon { box-shadow: 0 0 30px rgba(255, 179, 71, 0.3); }
.category-card.stress-relief:hover .category-icon { box-shadow: 0 0 30px rgba(255, 107, 157, 0.3); }
.category-card.sleep:hover .category-icon { box-shadow: 0 0 30px rgba(155, 109, 255, 0.3); }
.category-card.energy:hover .category-icon { box-shadow: 0 0 30px rgba(255, 243, 71, 0.3); }
.category-card.custom:hover .category-icon { box-shadow: 0 0 30px rgba(126, 231, 135, 0.3); }

.category-icon svg {
  width: 28px;
  height: 28px;
}

.category-card h3 {
  margin-bottom: var(--space-sm);
  position: relative;
}

.category-card p {
  font-size: 0.9375rem;
  line-height: 1.6;
  position: relative;
}

/* =============================================
   Features Section
   ============================================= */
.features {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-primary-dim);
  border-radius: var(--radius-full);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.125rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  background: rgba(22, 27, 34, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--color-border);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover), 0 0 40px var(--color-primary-dim);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  background: var(--color-primary-dim);
  color: var(--color-primary);
  transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
  background: var(--color-primary);
  color: var(--color-background);
  transform: scale(1.1);
  box-shadow: 0 0 30px var(--color-primary-glow);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.25rem;
}

.feature-card p {
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* =============================================
   Gamification Section
   ============================================= */
.gamification {
  padding: var(--space-4xl) 0;
  background: linear-gradient(180deg, var(--color-background) 0%, var(--color-background-alt) 50%, var(--color-background) 100%);
}

.gamification-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.gamification-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  transition: all var(--transition-normal);
}

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

.gamification-card h3 {
  margin-bottom: var(--space-lg);
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Level Tower */
.level-tower {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.level-block {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-background);
  transition: all var(--transition-normal);
}

.level-block:hover {
  transform: scaleX(1.05);
}

.level-block.beginner { width: 100%; background: var(--color-bronze); }
.level-block.novice { width: 92%; background: var(--color-bronze); }
.level-block.apprentice { width: 84%; background: var(--color-silver); }
.level-block.intermediate { width: 76%; background: var(--color-silver); }
.level-block.skilled { width: 68%; background: var(--color-gold); }
.level-block.proficient { width: 60%; background: var(--color-gold); }
.level-block.advanced { width: 52%; background: var(--color-gold); }
.level-block.expert { width: 44%; background: var(--color-platinum); }
.level-block.master { width: 36%; background: var(--color-platinum); }
.level-block.grandmaster { width: 28%; background: var(--color-diamond); }
.level-block.legend { width: 22%; background: linear-gradient(135deg, var(--color-diamond), var(--color-primary)); }
.level-block.zen-master { width: 16%; background: linear-gradient(135deg, var(--color-gold), var(--color-diamond), var(--color-primary)); }

.level-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Streak Fire */
.streak-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.streak-fire {
  width: 80px;
  height: 100px;
  position: relative;
  margin-bottom: var(--space-md);
}

.fire-flame {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 80px;
  background: var(--gradient-fire);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  filter: blur(1px);
  animation: fireFlicker 0.5s ease-in-out infinite alternate;
}

.fire-flame::before {
  content: '';
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 55px;
  background: linear-gradient(to top, #FF6B35, #FFD93D, #FFF8E0);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  animation: fireFlicker 0.3s ease-in-out infinite alternate-reverse;
}

.fire-flame::after {
  content: '';
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 35px;
  background: linear-gradient(to top, #FFF8E0, white);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  animation: fireFlicker 0.2s ease-in-out infinite alternate;
}

.streak-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-focus);
}

.streak-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Achievement Badges */
.badges-showcase {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.badge-row {
  display: flex;
  gap: var(--space-sm);
}

.achievement-badge {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-normal);
  cursor: default;
}

.achievement-badge:hover {
  transform: scale(1.15);
}

.achievement-badge.bronze {
  background: linear-gradient(135deg, var(--color-bronze), #A56326);
  box-shadow: 0 4px 12px rgba(205, 127, 50, 0.3);
}

.achievement-badge.silver {
  background: linear-gradient(135deg, var(--color-silver), #9A9A9A);
  box-shadow: 0 4px 12px rgba(192, 192, 192, 0.3);
}

.achievement-badge.gold {
  background: linear-gradient(135deg, var(--color-gold), #DAA520);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.achievement-badge.platinum {
  background: linear-gradient(135deg, var(--color-platinum), #B8B8B8);
  box-shadow: 0 4px 12px rgba(229, 228, 226, 0.3);
}

.achievement-badge.diamond {
  background: linear-gradient(135deg, var(--color-diamond), #5BB8E8);
  box-shadow: 0 4px 12px rgba(133, 212, 255, 0.3);
}

.badges-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* =============================================
   Stats Section
   ============================================= */
.stats {
  padding: var(--space-3xl) 0;
  background: var(--color-background-alt);
  border-top: 1px solid var(--color-border-subtle);
  border-bottom: 1px solid var(--color-border-subtle);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.stat-item {
  text-align: center;
  padding: var(--space-xl);
}

.stat-number {
  display: block;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.stat-number[data-count] {
  transition: color var(--transition-normal);
}

.stat-item:nth-child(1) .stat-number { color: var(--color-coherence); }
.stat-item:nth-child(2) .stat-number { color: var(--color-sleep); }
.stat-item:nth-child(3) .stat-number { color: var(--color-focus); }
.stat-item:nth-child(4) .stat-number { color: var(--color-custom); }

.stat-label {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* =============================================
   CTA Section
   ============================================= */
.cta {
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 1000px;
  height: 1000px;
  background: radial-gradient(
    circle,
    var(--color-primary-dim) 0%,
    rgba(155, 109, 255, 0.05) 30%,
    rgba(126, 231, 135, 0.05) 50%,
    transparent 70%
  );
  opacity: 0.6;
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  margin-bottom: var(--space-md);
}

.cta-content > p {
  font-size: 1.25rem;
  margin-bottom: var(--space-xl);
}

/* Breathing Phase Demo */
.breathing-demo {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.phase-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.phase-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  opacity: 0.4;
  transition: all var(--transition-normal);
}

.phase-dot.inhale { background: var(--color-inhale); }
.phase-dot.hold { background: var(--color-hold); }
.phase-dot.exhale { background: var(--color-exhale); }

.phase-indicator.active .phase-dot {
  opacity: 1;
  transform: scale(1.3);
  box-shadow: 0 0 20px currentColor;
}

.phase-indicator.active .phase-dot.inhale { box-shadow: 0 0 20px var(--color-inhale); }
.phase-indicator.active .phase-dot.hold { box-shadow: 0 0 20px var(--color-hold); }
.phase-indicator.active .phase-dot.exhale { box-shadow: 0 0 20px var(--color-exhale); }

.phase-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.phase-indicator.active .phase-label {
  color: var(--color-text-primary);
}

/* =============================================
   Footer
   ============================================= */
.footer {
  padding: var(--space-3xl) 0;
  background: var(--color-background-alt);
  border-top: 1px solid var(--color-border-subtle);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.footer-logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--color-primary);
}

.mini-breathing-core {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--color-primary), rgba(0, 212, 230, 0.6));
  animation: breatheCore 4s ease-in-out infinite;
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--color-primary);
  opacity: 1;
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* =============================================
   Legal Pages (Privacy & Terms)
   ============================================= */
.legal-page {
  min-height: 100vh;
  padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-3xl);
}

.legal-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border-subtle);
}

.legal-header h1 {
  margin-bottom: var(--space-sm);
  font-size: clamp(2rem, 4vw, 3rem);
}

.legal-header .last-updated {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: 1.5rem;
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.legal-content h3 {
  font-size: 1.125rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.legal-content p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.legal-content ul, .legal-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
  color: var(--color-text-secondary);
}

.legal-content li {
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.legal-content strong {
  color: var(--color-text-primary);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.back-link:hover {
  color: var(--color-primary);
  opacity: 1;
}

/* =============================================
   404 Page
   ============================================= */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2xl);
}

.error-content h1 {
  font-size: 10rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  opacity: 0.3;
  line-height: 1;
}

.error-content h2 {
  margin-bottom: var(--space-md);
}

.error-content p {
  margin-bottom: var(--space-xl);
  font-size: 1.125rem;
}

.error-content .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, rgba(0, 180, 200, 1) 100%);
  color: var(--color-background);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-normal);
}

.error-content .btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes glowPulse {
  0%, 100% {
    opacity: 0.4;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.7;
    transform: translateX(-50%) scale(1.1);
  }
}

@keyframes breatheRing {
  0%, 100% {
    transform: scale(1);
    opacity: 0.3;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.6;
  }
}

@keyframes breatheCore {
  0%, 100% {
    transform: scale(1);
    box-shadow:
      0 0 40px var(--color-primary-glow),
      0 0 80px var(--color-primary-dim),
      inset 0 -10px 20px rgba(0, 0, 0, 0.3);
  }
  50% {
    transform: scale(1.2);
    box-shadow:
      0 0 60px var(--color-primary-intense),
      0 0 120px var(--color-primary-glow),
      inset 0 -10px 20px rgba(0, 0, 0, 0.3);
  }
}

/* Phase-aware breathing animation - 12s total (4s inhale, 2s hold, 4s exhale, 2s hold) */
@keyframes breatheWithPhases {
  /* Inhale phase - Cyan (0-33%) */
  0% {
    transform: scale(1);
    background: radial-gradient(circle at 30% 30%, var(--color-inhale), rgba(0, 212, 230, 0.6));
    border-color: var(--color-inhale);
    box-shadow: 0 0 40px rgba(0, 212, 230, 0.3);
  }
  33% {
    transform: scale(1.3);
    background: radial-gradient(circle at 30% 30%, var(--color-inhale), rgba(0, 212, 230, 0.8));
    border-color: var(--color-inhale);
    box-shadow: 0 0 60px rgba(0, 212, 230, 0.5);
  }
  /* Hold phase - Purple (33-50%) */
  34% {
    background: radial-gradient(circle at 30% 30%, var(--color-hold), rgba(155, 109, 255, 0.6));
    border-color: var(--color-hold);
    box-shadow: 0 0 60px rgba(155, 109, 255, 0.5);
  }
  50% {
    transform: scale(1.3);
    background: radial-gradient(circle at 30% 30%, var(--color-hold), rgba(155, 109, 255, 0.8));
    border-color: var(--color-hold);
    box-shadow: 0 0 60px rgba(155, 109, 255, 0.5);
  }
  /* Exhale phase - Green (50-83%) */
  51% {
    background: radial-gradient(circle at 30% 30%, var(--color-exhale), rgba(126, 231, 135, 0.6));
    border-color: var(--color-exhale);
  }
  83% {
    transform: scale(1);
    background: radial-gradient(circle at 30% 30%, var(--color-exhale), rgba(126, 231, 135, 0.6));
    border-color: var(--color-exhale);
    box-shadow: 0 0 40px rgba(126, 231, 135, 0.3);
  }
  /* Hold phase - Purple (83-100%) */
  84% {
    background: radial-gradient(circle at 30% 30%, var(--color-hold), rgba(155, 109, 255, 0.6));
    border-color: var(--color-hold);
  }
  100% {
    transform: scale(1);
    background: radial-gradient(circle at 30% 30%, var(--color-inhale), rgba(0, 212, 230, 0.6));
    border-color: var(--color-inhale);
    box-shadow: 0 0 40px rgba(0, 212, 230, 0.3);
  }
}

@keyframes rainbowSpin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes floatParticle {
  0%, 100% {
    transform: translateY(0) translateX(0);
    opacity: 0.6;
  }
  25% {
    transform: translateY(-30px) translateX(10px);
    opacity: 0.8;
  }
  50% {
    transform: translateY(-15px) translateX(-15px);
    opacity: 0.4;
  }
  75% {
    transform: translateY(-40px) translateX(5px);
    opacity: 0.7;
  }
}

@keyframes fireFlicker {
  0% {
    transform: translateX(-50%) scale(1) rotate(-2deg);
    filter: blur(1px);
  }
  100% {
    transform: translateX(-50%) scale(1.05) rotate(2deg);
    filter: blur(2px);
  }
}

@keyframes phaseText {
  0%, 33% { content: 'Inhale'; }
  34%, 50% { content: 'Hold'; }
  51%, 83% { content: 'Exhale'; }
  84%, 100% { content: 'Hold'; }
}

@keyframes scrollBounce {
  0%, 100% {
    transform: rotate(45deg) translateY(0);
    opacity: 0.5;
  }
  50% {
    transform: rotate(45deg) translateY(8px);
    opacity: 1;
  }
}

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

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Staggered animation delays for cards */
.stagger-1 { transition-delay: 0ms; }
.stagger-2 { transition-delay: 100ms; }
.stagger-3 { transition-delay: 200ms; }
.stagger-4 { transition-delay: 300ms; }
.stagger-5 { transition-delay: 400ms; }
.stagger-6 { transition-delay: 500ms; }

/* =============================================
   Responsive Design
   ============================================= */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gamification-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

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

  .app-preview-container {
    flex-direction: column;
  }

  .preview-content {
    text-align: center;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  /* Mobile Navigation */
  .header-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-2xl);
  }

  .breathing-logo {
    width: 140px;
    height: 140px;
  }

  .breathing-core {
    width: 50px;
    height: 50px;
  }

  .store-buttons {
    flex-direction: column;
    align-items: center;
  }

  .store-button {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .scroll-indicator {
    display: none;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .stat-item {
    padding: var(--space-md);
  }

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

  .device-frame {
    width: 240px;
    height: 500px;
  }

  .breathing-demo {
    gap: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .feature-card {
    padding: var(--space-lg);
  }

  .category-card {
    padding: var(--space-lg);
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-number {
    font-size: 3rem;
  }

  .cta-content p {
    font-size: 1rem;
  }

  .gamification-card {
    padding: var(--space-xl);
  }

  .level-block {
    height: 24px;
    font-size: 0.65rem;
  }
}

/* =============================================
   Reduced Motion
   ============================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .breathing-core,
  .breathing-ring,
  .rainbow-ring,
  .mini-breathing-core,
  .fire-flame,
  .particle {
    animation: none;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* =============================================
   Utilities
   ============================================= */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}