/* ===================================
   BookApp Website - Premium Styles
   =================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@600;700&display=swap');

/* CSS Variables */
:root {
  /* Colors - Dark Theme with Reading App Feel */
  --bg-primary: #0f0f14;
  --bg-secondary: #1a1a24;
  --bg-card: #22222e;
  --bg-elevated: #2a2a38;
  
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7a;
  
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Animated Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* Links */
a {
  color: var(--accent-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

.container--narrow {
  max-width: 800px;
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 15, 20, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-md) 0;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.header__logo-icon {
  font-size: 1.75rem;
}

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

.nav__link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav__link:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav__link--active {
  color: var(--accent-primary);
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-sm);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: var(--accent-gradient);
  opacity: 0.1;
  filter: blur(100px);
  border-radius: 50%;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: var(--space-sm) var(--space-md);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, #ffffff 0%, #a0a0b0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  line-height: 1.7;
}

.hero__cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.btn--primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.4);
  color: white;
}

.btn--secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn--secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--border-hover);
  color: var(--text-primary);
}

/* ===================================
   Features Section
   =================================== */
.features {
  padding: var(--space-3xl) 0;
}

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

.section-header__subtitle {
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section-header__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
}

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

.feature-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  font-size: 1.5rem;
  margin-bottom: var(--space-lg);
}

.feature-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.feature-card__description {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===================================
   Legal Pages Styles
   =================================== */
.legal-page {
  padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
}

.legal-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--border);
}

.legal-header__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.legal-header__updated {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.legal-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

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

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

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

.legal-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Info Boxes */
.info-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}

.info-box--warning {
  border-color: var(--warning);
  background: rgba(245, 158, 11, 0.1);
}

.info-box--success {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.1);
}

.info-box__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

/* ===================================
   Support Page Styles
   =================================== */
.support-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
}

.support-section__title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.support-section__content {
  color: var(--text-secondary);
}

.email-template {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-top: var(--space-md);
  font-family: monospace;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.email-template strong {
  color: var(--accent-primary);
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer__link {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer__link:hover {
  color: var(--text-primary);
}

.footer__copyright {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===================================
   Cookie Consent Banner
   =================================== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: var(--space-lg);
  z-index: 1000;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.cookie-banner--visible {
  transform: translateY(0);
}

.cookie-banner__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.cookie-banner__text {
  flex: 1;
  min-width: 300px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.cookie-banner__text a {
  color: var(--accent-primary);
}

.cookie-banner__buttons {
  display: flex;
  gap: var(--space-sm);
}

.cookie-btn {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-weight: 500;
  transition: all var(--transition-fast);
}

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

.cookie-btn--accept:hover {
  background: var(--accent-secondary);
}

.cookie-btn--decline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.cookie-btn--decline:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-sm);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
  }

  .nav--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: calc(80px + var(--space-2xl)) 0 var(--space-2xl);
  }

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

  .btn {
    width: 100%;
    max-width: 300px;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .cookie-banner__inner {
    flex-direction: column;
    text-align: center;
  }

  .cookie-banner__buttons {
    width: 100%;
    flex-direction: column;
  }

  .cookie-btn {
    width: 100%;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }