/* LibriShelf Website Styles - Matching App Theme */

:root {
  /* Primary colors matching Indigo theme */
  --primary-color: #4450A0;
  --primary-light: #5c6bc0;
  --primary-dark: #303f9f;
  --secondary-color: #7986CB;

  /* Neutrals */
  --bg-color: #FAFAFA;
  --card-bg: #FFFFFF;
  --text-primary: #212121;
  --text-secondary: #757575;
  --border-color: #E0E0E0;

  /* Success/accent colors */
  --success-color: #4CAF50;
  --accent-orange: #FF9800;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 64px;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 16px rgba(0,0,0,0.15);
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Header */
header {
  background-color: var(--card-bg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-primary);
  font-size: 24px;
  font-weight: 700;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.3s;
  padding: var(--spacing-xs);
}

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

/* Better touch targets for mobile */
@media (max-width: 768px) {
  nav a {
    padding: var(--spacing-sm);
    display: block;
  }
}

/* Main content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
}

/* Hero section */
.hero {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: var(--spacing-sm);
  color: white;
}

.hero .tagline {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-lg);
}

.app-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-md);
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 60px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
  font-size: 16px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
}

.btn-group {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* Store badges */
.store-badges {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  align-items: center;
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

.store-badge {
  height: 60px;
  transition: transform 0.3s;
}

.store-badge:hover {
  transform: scale(1.05);
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.feature-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin-bottom: var(--spacing-sm);
  box-shadow: 0 4px 12px rgba(68, 80, 160, 0.3);
}

/* Add color variations for feature icons */
.feature-card:nth-child(3n+1) .feature-icon {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
}

.feature-card:nth-child(3n+2) .feature-icon {
  background: linear-gradient(135deg, var(--success-color), #66BB6A);
}

.feature-card:nth-child(3n+3) .feature-icon {
  background: linear-gradient(135deg, var(--accent-orange), #FFB74D);
}

.feature-card h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

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

/* Content sections */
.content-section {
  margin: var(--spacing-lg) 0;
}

.content-section h2 {
  font-size: 32px;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.content-section h2[style*="text-align: center"]::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  border-radius: 2px;
}

.content-section h3 {
  font-size: 24px;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.content-section p,
.content-section ul {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.content-section ul {
  margin-left: var(--spacing-md);
  line-height: 1.8;
}

.content-section li {
  margin-bottom: var(--spacing-xs);
}

/* Footer */
footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg) var(--spacing-md);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.footer-section h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.footer-section ul {
  list-style: none;
}

.footer-section a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
  display: block;
  margin-bottom: var(--spacing-xs);
}

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

.footer-bottom {
  max-width: 1200px;
  margin: var(--spacing-lg) auto 0;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
}

/* Donation page specific */
.donation-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.donation-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.donation-card h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero .tagline {
    font-size: 18px;
  }

  .app-icon {
    width: 100px;
    height: 100px;
    font-size: 50px;
  }

  nav {
    padding: var(--spacing-sm);
  }

  nav ul {
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: center;
  }

  .logo {
    font-size: 20px;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

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

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

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

  .store-badge {
    max-width: 200px;
  }

  .donation-methods {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    text-align: center;
  }

  .content-section h2 {
    font-size: 28px;
  }

  .legal-content {
    padding: var(--spacing-md);
  }
}

/* Tablet responsive */
@media (max-width: 1024px) and (min-width: 769px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Legal pages - better readability */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--card-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.legal-content h1 {
  margin-bottom: var(--spacing-xs);
}

.legal-content .last-updated {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: 14px;
}

.legal-content section {
  margin-bottom: var(--spacing-lg);
}

.legal-content section:last-child {
  margin-bottom: 0;
}