/* Sudoku Bloom:Logic Flow - Landing Page Styles */
/* Color Scheme: Botanical Sage & Lavender */
/* Typography: Clean Geometric Sans */

:root {
  /* Botanical Sage & Lavender Color Palette */
  --sage-primary: #7a9d8f;
  --sage-dark: #5a7d6f;
  --lavender-accent: #b8a9d4;
  --lavender-light: #d4c9e8;
  --cream-bg: #f8f6f1;
  --deep-green: #3d5a4f;
  --white: #ffffff;
  --text-dark: #2c3e3a;
  --text-medium: #5a6d67;
  
  /* Typography */
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Helvetica Neue', Arial, sans-serif;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

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

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

/* Sticky Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  background-color: rgba(248, 246, 241, 0.95);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-sm);
  z-index: 100;
  border-bottom: 1px solid rgba(122, 157, 143, 0.1);
}

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

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

.header-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--deep-green);
}

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

.header-download-btn {
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  background-color: var(--sage-dark);
  color: var(--white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: background-color var(--transition-base), transform var(--transition-base);
}

.header-download-btn:hover {
  background-color: var(--deep-green);
}

.header-download-btn:active {
  transform: scale(0.95);
}

.header-nav {
  display: none;
}

/* Main Content Offset */
main {
  padding-top: 48px;
}

/* Hero Section - Full-width Banner with Centered Floating Text Card */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl) var(--spacing-sm);
  overflow: hidden;
}

.hero-banner {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(61, 90, 79, 0.75) 0%, rgba(122, 157, 143, 0.65) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 560px;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(61, 90, 79, 0.3);
  text-align: center;
  animation: heroFadeIn 0.8s ease-out;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.hero-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(122, 157, 143, 0.3);
}

.hero-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--deep-green);
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-medium);
  margin-bottom: var(--spacing-lg);
  line-height: 1.5;
}

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

.download-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 16px var(--spacing-md);
  min-height: 56px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  transition: transform var(--transition-base), box-shadow var(--transition-base), opacity var(--transition-base);
}

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

.download-btn-google {
  background-color: var(--sage-dark);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(90, 125, 111, 0.3);
}

.download-btn-google:hover {
  box-shadow: 0 6px 24px rgba(90, 125, 111, 0.4);
  background-color: var(--deep-green);
}

.download-btn-apple {
  background-color: #2a2a2a;
  color: var(--white);
  opacity: 0.55;
  filter: grayscale(0.6);
  cursor: not-allowed;
  position: relative;
}

.download-btn-apple::after {
  content: 'Coming Soon';
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: var(--lavender-accent);
  color: var(--white);
  font-size: 10px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.download-btn-icon {
  font-size: 24px;
}

.trust-badge {
  font-size: 13px;
  color: var(--text-medium);
}

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

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

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--deep-green);
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-medium);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background-color: var(--cream-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
  border: 2px solid transparent;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.feature-card:hover {
  border-color: var(--sage-primary);
  transform: translateY(-4px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, var(--sage-primary), var(--lavender-accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--white);
}

.feature-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--deep-green);
  margin-bottom: var(--spacing-xs);
}

.feature-description {
  font-size: 14px;
  color: var(--text-medium);
  line-height: 1.6;
}

/* Download CTA Section */
.download-cta {
  padding: var(--spacing-2xl) var(--spacing-sm);
  background: linear-gradient(135deg, var(--sage-primary) 0%, var(--lavender-accent) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.download-cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.2); opacity: 0.8; }
}

.download-cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.download-cta-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.download-cta-subtitle {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-lg);
}

.download-cta-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.download-cta-buttons .download-btn {
  background-color: var(--white);
  color: var(--sage-primary);
}

.download-cta-buttons .download-btn-apple {
  background-color: #2a2a2a;
  color: var(--white);
}

/* Mobile Sticky CTA */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--white);
  padding: var(--spacing-sm);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.1);
  z-index: 99;
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

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

.sticky-cta-btn {
  width: 100%;
  background-color: var(--sage-dark);
  color: var(--white);
  padding: 16px;
  min-height: 56px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(90, 125, 111, 0.3);
}

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

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

.about-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--deep-green);
  margin-bottom: var(--spacing-md);
}

.about-text {
  font-size: 16px;
  color: var(--text-medium);
  margin-bottom: var(--spacing-sm);
  line-height: 1.7;
}

.about-contact {
  font-size: 14px;
  color: var(--text-medium);
  margin-top: var(--spacing-md);
}

.about-email {
  color: var(--sage-primary);
  font-weight: 600;
  text-decoration: underline;
}

/* Footer */
.footer {
  padding: var(--spacing-xl) var(--spacing-sm);
  background-color: var(--deep-green);
  color: var(--white);
  text-align: center;
}

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

.footer-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

.footer-title {
  font-size: 18px;
  font-weight: 600;
}

.footer-contact {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-md);
}

.footer-email {
  color: var(--lavender-light);
  text-decoration: underline;
}

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

.footer-link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: underline;
  transition: color var(--transition-base);
}

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

.footer-copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* Tablet Styles */
@media (min-width: 768px) {
  .header {
    height: 64px;
    padding: 0 var(--spacing-lg);
  }
  
  .header-title {
    font-size: 16px;
  }
  
  .header-icon {
    width: 40px;
    height: 40px;
  }
  
  .header-download-btn {
    width: auto;
    padding: 0 var(--spacing-md);
    border-radius: var(--radius-md);
  }
  
  .header-download-btn::after {
    content: 'Download';
    margin-left: var(--spacing-xs);
  }
  
  .header-nav {
    display: flex;
    gap: var(--spacing-md);
  }
  
  .header-nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-medium);
    transition: color var(--transition-base);
  }
  
  .header-nav-link:hover {
    color: var(--sage-primary);
  }
  
  main {
    padding-top: 64px;
  }
  
  .hero {
    min-height: 90vh;
    padding: var(--spacing-2xl) var(--spacing-lg);
  }
  
  .hero-content {
    padding: var(--spacing-xl);
  }
  
  .hero-icon {
    width: 100px;
    height: 100px;
  }
  
  .hero-title {
    font-size: 42px;
  }
  
  .hero-subtitle {
    font-size: 18px;
  }
  
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }
  
  .download-btn {
    flex: 1;
    max-width: 240px;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
  
  .download-cta-title {
    font-size: 42px;
  }
  
  .download-cta-subtitle {
    font-size: 18px;
  }
  
  .download-cta-buttons {
    flex-direction: row;
    justify-content: center;
  }
  
  .download-cta-buttons .download-btn {
    flex: 1;
    max-width: 280px;
  }
  
  /* Hide mobile sticky CTA on tablet/desktop */
  .sticky-cta {
    display: none;
  }
}

/* Desktop Styles */
@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .hero-title {
    font-size: 48px;
  }
  
  .section-title {
    font-size: 36px;
  }
  
  .download-cta-title {
    font-size: 48px;
  }
}