/* ===================================
   CUPIDBOOK - Modern Design System
   =================================== */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;800&family=Poppins:wght@400;600;700;800&display=swap');

/* ===================================
   CSS VARIABLES
   =================================== */
:root {
  /* Colors - Vibrant Palette */
  --primary: #E91E63;
  --primary-light: #FF4081;
  --primary-dark: #C2185B;
  --secondary: #9C27B0;
  --secondary-light: #BA68C8;
  --accent: #FF6B9D;
  --accent-glow: #FF1744;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #E91E63 0%, #9C27B0 100%);
  --gradient-hero: linear-gradient(135deg, rgba(233, 30, 99, 0.9) 0%, rgba(156, 39, 176, 0.9) 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);

  /* Dark Theme */
  --bg-dark: #0a0a0a;
  --bg-dark-secondary: #1a1a1a;
  --bg-dark-tertiary: #2a2a2a;

  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.8);
  --text-muted: rgba(255, 255, 255, 0.6);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(233, 30, 99, 0.4);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 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-primary);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* ===================================
   LAYOUT
   =================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
}

.header.scrolled {
  background: rgba(10, 10, 10, 0.95);
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 10px rgba(233, 30, 99, 0.5));
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-fast);
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../images/hero-background.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  z-index: -2;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
  z-index: -1;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  animation: fadeInUp 1s ease;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-xl);
  transition: var(--transition-normal);
  cursor: pointer;
  border: none;
  font-family: var(--font-heading);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-glow);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: var(--transition-slow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 60px rgba(233, 30, 99, 0.6);
}

.btn-primary:hover::before {
  left: 100%;
}

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

.btn-outline:hover {
  background: var(--gradient-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

/* ===================================
   GLASS CARDS
   =================================== */
.card {
  background: var(--gradient-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233, 30, 99, 0.3);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.card-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.card-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================
   FEATURES GRID
   =================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

/* ===================================
   HOW IT WORKS
   =================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.step {
  text-align: center;
  padding: var(--spacing-md);
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-sm);
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 800;
  font-family: var(--font-heading);
  box-shadow: var(--shadow-glow);
  transition: var(--transition-normal);
}

.step:hover .step-number {
  transform: scale(1.2) rotate(360deg);
}

.step-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.step-description {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact {
  background: var(--bg-dark-secondary);
  text-align: center;
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
  background: var(--bg-dark-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-md) 0;
  text-align: center;
}

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

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Scroll reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  .nav-links {
    gap: var(--spacing-sm);
  }

  .hero {
    min-height: 80vh;
  }

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

  .section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .btn {
    padding: 0.875rem 2rem;
    font-size: 1rem;
  }

  .nav-links {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
}

/* ===================================
   UTILITY CLASSES
   =================================== */
.text-center {
  text-align: center;
}

.mt-1 {
  margin-top: var(--spacing-xs);
}

.mt-2 {
  margin-top: var(--spacing-sm);
}

.mt-3 {
  margin-top: var(--spacing-md);
}

.mt-4 {
  margin-top: var(--spacing-lg);
}

.mb-1 {
  margin-bottom: var(--spacing-xs);
}

.mb-2 {
  margin-bottom: var(--spacing-sm);
}

.mb-3 {
  margin-bottom: var(--spacing-md);
}

.mb-4 {
  margin-bottom: var(--spacing-lg);
}