/* ============================================
   Bubble:Pop Shooters Landing Page Styles
   Theme: Dreamy Whimsical with Pastel Sky & Bubble Spectrum
   Mobile-first responsive design
   ============================================ */

/* ============================================
   CSS Variables
   ============================================ */
:root {
  /* Primary pastel sky colors */
  --color-sky-light: #E3F2FD;
  --color-sky-blue: #A8D8EA;
  --color-sky-deep: #7FC8F8;
  
  /* Bubble spectrum colors */
  --color-bubble-lavender: #D4C5F9;
  --color-bubble-pink: #FFB6D9;
  --color-bubble-mint: #B8F2E6;
  --color-bubble-peach: #FFC8A2;
  
  /* Neutral colors */
  --color-cloud-white: #FFFFFF;
  --color-cloud-cream: #FFFEF9;
  --color-mist-gray: #F5F7FA;
  --color-text-dark: #4A5568;
  --color-text-light: #718096;
  
  /* Gradient backgrounds */
  --gradient-sky: linear-gradient(135deg, #E3F2FD 0%, #A8D8EA 50%, #D4C5F9 100%);
  --gradient-bubble: linear-gradient(135deg, #A8D8EA 0%, #D4C5F9 50%, #FFB6D9 100%);
  --gradient-soft: linear-gradient(180deg, #FFFFFF 0%, #F5F7FA 100%);
  
  /* Shadows for floating effect */
  --shadow-float: 0 8px 24px rgba(168, 216, 234, 0.25);
  --shadow-card: 0 4px 16px rgba(168, 216, 234, 0.15);
  --shadow-glow: 0 0 20px rgba(212, 197, 249, 0.4);
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-dark);
  background: var(--color-cloud-cream);
  overflow-x: hidden;
}

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

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

a:hover {
  opacity: 0.8;
}

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

/* ============================================
   Header (Sticky Navigation)
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(168, 216, 234, 0.2);
  padding: 0.75rem 0;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.header-title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
  display: none;
}

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

.nav-link {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  display: none;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-sky-deep);
  opacity: 1;
}

.nav-cta {
  background: var(--gradient-bubble);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-float);
  opacity: 1;
}

.nav-cta-text {
  display: none;
}

.nav-cta-icon {
  font-size: 1.25rem;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  padding: 6rem var(--spacing-sm) var(--spacing-2xl);
  background: var(--gradient-sky);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(212, 197, 249, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  width: 100%;
}

.hero-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-md);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-float);
  animation: floatBubble 3s ease-in-out infinite;
}

@keyframes floatBubble {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

.hero-title {
  font-size: 2.25rem;
  font-weight: var(--font-weight-light);
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-sky-deep);
  margin-bottom: var(--spacing-md);
}

.hero-description {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.hero-visual {
  width: 100%;
  margin-top: var(--spacing-xl);
}

.hero-banner {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-float);
}

/* ============================================
   Download Buttons
   ============================================ */
.download-button,
.download-button-large {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-medium);
  position: relative;
  min-height: 56px;
  width: 100%;
  justify-content: center;
}

.download-button-large {
  padding: 1rem 2rem;
  min-height: 64px;
}

.download-button.google-play,
.download-button-large.google-play {
  background: var(--gradient-bubble);
  color: white;
  box-shadow: var(--shadow-card);
}

.download-button.google-play:hover,
.download-button-large.google-play:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-float);
  opacity: 1;
}

.download-button.google-play:active,
.download-button-large.google-play:active {
  transform: translateY(-1px);
}

.download-button.app-store,
.download-button-large.app-store {
  background: #2a2a2a;
  color: white;
  opacity: 0.55;
  filter: grayscale(0.6);
  cursor: not-allowed;
  position: relative;
}

.download-button.app-store:hover,
.download-button-large.app-store:hover {
  transform: none;
  opacity: 0.55;
}

.coming-soon-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: var(--color-bubble-peach);
  color: white;
  font-size: 0.625rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  box-shadow: var(--shadow-card);
}

.store-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.button-labels {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  line-height: 1.2;
}

.button-label-top {
  font-size: 0.625rem;
  opacity: 0.9;
}

.button-label-bottom {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
}

/* ============================================
   Features Section
   ============================================ */
.features {
  padding: var(--spacing-2xl) var(--spacing-sm);
  background: var(--gradient-soft);
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  font-weight: var(--font-weight-light);
  color: var(--color-text-dark);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  letter-spacing: 0.02em;
}

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

.feature-card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  opacity: 0;
  transform: translateY(20px);
}

.feature-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-float);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-xs);
}

.feature-description {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-light);
}

/* ============================================
   Download CTA Section
   ============================================ */
.download-cta {
  padding: var(--spacing-2xl) var(--spacing-sm);
  background: var(--gradient-bubble);
  position: relative;
  overflow: hidden;
}

.download-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

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

.download-cta-title {
  font-size: 2rem;
  font-weight: var(--font-weight-medium);
  color: white;
  margin-bottom: var(--spacing-sm);
}

.download-cta-subtitle {
  font-size: 1.125rem;
  font-weight: var(--font-weight-light);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
}

.download-cta-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
  margin: 0 auto;
}

/* ============================================
   Mobile Sticky CTA
   ============================================ */
.mobile-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(168, 216, 234, 0.3);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.1);
  z-index: 999;
  transform: translateY(100%);
  transition: transform var(--transition-medium);
}

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

.sticky-button {
  display: block;
  width: 100%;
  padding: 1rem;
  background: var(--gradient-bubble);
  color: white;
  text-align: center;
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast);
}

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

/* ============================================
   About Section
   ============================================ */
.about {
  padding: var(--spacing-2xl) var(--spacing-sm);
  background: white;
}

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

.about-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.about-contact {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-mist-gray);
}

.about-contact a {
  color: var(--color-sky-deep);
  font-weight: var(--font-weight-medium);
}

.about-contact a:hover {
  text-decoration: underline;
  opacity: 1;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--spacing-xl) var(--spacing-sm) var(--spacing-lg);
  background: var(--color-mist-gray);
  border-top: 1px solid rgba(168, 216, 234, 0.2);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.footer-title {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-dark);
}

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

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
}

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

.footer-contact a {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-sm);
}

/* ============================================
   Tablet Responsive (min-width: 768px)
   ============================================ */
@media (min-width: 768px) {
  .header-title {
    display: block;
  }
  
  .nav-link {
    display: block;
  }
  
  .nav-cta-text {
    display: inline;
  }
  
  .nav-cta-icon {
    display: none;
  }
  
  .hero {
    padding: 8rem var(--spacing-md) var(--spacing-2xl);
  }
  
  .hero-container {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-2xl);
    text-align: left;
  }
  
  .hero-content {
    flex: 1;
  }
  
  .hero-visual {
    flex: 1;
    margin-top: 0;
  }
  
  .hero-icon {
    margin-left: 0;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.5rem;
  }
  
  .hero-description {
    margin-left: 0;
    margin-right: 0;
  }
  
  .hero-buttons {
    flex-direction: row;
    gap: var(--spacing-md);
  }
  
  .download-button {
    width: auto;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  
  .download-cta-buttons {
    flex-direction: row;
    max-width: none;
    justify-content: center;
  }
  
  .download-button-large {
    width: auto;
  }
  
  .mobile-sticky-cta {
    display: none;
  }
  
  .footer-container {
    gap: var(--spacing-lg);
  }
}

/* ============================================
   Desktop Responsive (min-width: 1024px)
   ============================================ */
@media (min-width: 1024px) {
  .hero-title {
    font-size: 3.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.75rem;
  }
  
  .hero-description {
    font-size: 1.125rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .section-title {
    font-size: 2.5rem;
  }
  
  .download-cta-title {
    font-size: 2.5rem;
  }
}