/* ===================================
   Neon Pop: Cyber Glow - Main Styles
   Mobile-First Approach
   =================================== */

/* CSS Variables */
:root {
  /* Neon Pink & Electric Yellow on Dark Color Scheme */
  --color-primary: #ff0080;
  --color-secondary: #ffed00;
  --color-accent: #00f0ff;
  --color-dark: #0a0a0f;
  --color-dark-secondary: #1a1a28;
  --color-dark-tertiary: #2a2a3c;
  --color-text: #ffffff;
  --color-text-secondary: #b8b8d0;
  --color-text-muted: #888899;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-xxl: 32px;
  --font-size-hero: 36px;
  
  /* Layout */
  --container-max: 1200px;
  --header-height: 60px;
  --border-radius: 12px;
  --border-radius-lg: 20px;
  
  /* Effects */
  --glow-pink: 0 0 20px rgba(255, 0, 128, 0.6), 0 0 40px rgba(255, 0, 128, 0.3);
  --glow-yellow: 0 0 20px rgba(255, 237, 0, 0.6), 0 0 40px rgba(255, 237, 0, 0.3);
  --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.6), 0 0 40px rgba(0, 240, 255, 0.3);
  --transition-base: all 0.3s ease;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-dark);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===================================
   Header - Sticky Navigation
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 0, 128, 0.2);
  z-index: 1000;
}

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

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.header-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  box-shadow: var(--glow-pink);
}

.header-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-nav {
  display: none;
}

.header-cta-mobile {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: var(--transition-base);
}

.header-cta-mobile:active {
  transform: scale(0.95);
  color: var(--color-secondary);
}

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

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.hero-banner {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 15, 0.7) 0%,
    rgba(10, 10, 15, 0.85) 50%,
    rgba(10, 10, 15, 0.95) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.hero-icon-badge {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--spacing-md);
  border-radius: 24px;
  padding: 4px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  box-shadow: var(--glow-pink);
  animation: float 3s ease-in-out infinite;
}

.hero-icon {
  width: 100%;
  height: 100%;
  border-radius: 20px;
  background: var(--color-dark);
}

.hero-title {
  font-size: var(--font-size-hero);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(255, 0, 128, 0.5);
}

.hero-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: center;
}

/* ===================================
   Download Buttons
   =================================== */
.download-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 14px 24px;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition-base);
  min-width: 200px;
  min-height: 56px;
}

.download-btn.large {
  min-width: 240px;
  min-height: 64px;
  padding: 18px 32px;
}

.btn-icon {
  flex-shrink: 0;
}

.btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.btn-label {
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.9;
}

.btn-store {
  font-size: 16px;
  font-weight: 700;
}

/* Google Play Button */
.download-btn.google-play {
  background: var(--color-primary);
  color: #000000;
  box-shadow: var(--glow-pink);
}

.download-btn.google-play:hover {
  background: #ff1a8f;
  box-shadow: 0 0 30px rgba(255, 0, 128, 0.8), 0 0 60px rgba(255, 0, 128, 0.4);
  transform: translateY(-2px);
}

.download-btn.google-play:active {
  transform: translateY(0);
}

/* App Store Button (Disabled) */
.download-btn.app-store {
  position: relative;
  background: #2a2a2a;
  color: var(--color-text);
  opacity: 0.55;
  filter: grayscale(0.6);
  cursor: not-allowed;
}

.download-btn.app-store:hover {
  transform: none;
  box-shadow: none;
}

.coming-soon-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--color-dark-tertiary);
  color: var(--color-text-muted);
  font-size: 10px;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===================================
   Features Section
   =================================== */
.features {
  padding: var(--spacing-xxl) 0;
  background: linear-gradient(
    to bottom,
    var(--color-dark) 0%,
    var(--color-dark-secondary) 50%,
    var(--color-dark) 100%
  );
}

.section-title {
  font-size: var(--font-size-xxl);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.feature-card {
  background: var(--color-dark-tertiary);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 0, 128, 0.2);
  transition: var(--transition-base);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-sm);
  color: var(--color-secondary);
  filter: drop-shadow(var(--glow-yellow));
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.feature-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===================================
   Download CTA Section
   =================================== */
.download-cta {
  padding: var(--spacing-xxl) 0;
  background: linear-gradient(135deg, rgba(255, 0, 128, 0.1), rgba(255, 237, 0, 0.1));
  text-align: center;
}

.cta-title {
  font-size: var(--font-size-xxl);
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

/* ===================================
   About Section
   =================================== */
.about {
  padding: var(--spacing-xxl) 0;
  background: var(--color-dark-secondary);
}

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

.about-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.about-contact {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--color-dark-tertiary);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 0, 128, 0.2);
}

.contact-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.contact-email {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-base);
}

.contact-email svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-email a {
  color: var(--color-text-secondary);
}

.contact-email a:hover {
  color: var(--color-primary);
}

/* ===================================
   Footer
   =================================== */
.footer {
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  background: var(--color-dark);
  border-top: 1px solid rgba(255, 0, 128, 0.2);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.footer-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.footer-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

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

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

.footer-contact {
  font-size: var(--font-size-sm);
}

.footer-email {
  color: var(--color-text-secondary);
}

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

.footer-copyright {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===================================
   Mobile Sticky CTA
   =================================== */
.mobile-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-sm);
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 0, 128, 0.3);
  z-index: 999;
  opacity: 0;
  transform: translateY(100%);
  transition: var(--transition-base);
}

.mobile-sticky-cta.visible {
  opacity: 1;
  transform: translateY(0);
}

.sticky-cta-btn {
  display: block;
  width: 100%;
  padding: 16px;
  background: var(--color-primary);
  color: #000000;
  text-align: center;
  font-size: var(--font-size-base);
  font-weight: 700;
  border-radius: 50px;
  box-shadow: var(--glow-pink);
  transition: var(--transition-base);
}

.sticky-cta-btn:active {
  transform: scale(0.98);
}

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

/* ===================================
   Responsive - Tablet (768px+)
   =================================== */
@media (min-width: 768px) {
  :root {
    --header-height: 72px;
    --font-size-hero: 48px;
    --font-size-xxl: 40px;
  }

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

  .nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
  }

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

  .nav-cta {
    padding: 10px 20px;
    background: var(--color-primary);
    color: var(--color-text);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: var(--transition-base);
  }

  .nav-cta:hover {
    background: #ff1a8f;
    box-shadow: var(--glow-pink);
  }

  .header-cta-mobile {
    display: none;
  }

  .hero-buttons,
  .cta-buttons {
    flex-direction: row;
    justify-content: center;
  }

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

  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }

  .footer-brand {
    justify-content: flex-start;
  }

  .footer-links {
    justify-content: center;
  }

  /* Hide mobile sticky CTA on tablet+ */
  .mobile-sticky-cta {
    display: none;
  }
}

/* ===================================
   Responsive - Desktop (1024px+)
   =================================== */
@media (min-width: 1024px) {
  :root {
    --font-size-hero: 56px;
    --spacing-xxl: 5rem;
  }

  .hero-content {
    max-width: 700px;
  }

  .hero-icon-badge {
    width: 120px;
    height: 120px;
  }

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

  .feature-card:hover {
    transform: translateY(-8px);
  }
}