/* Song Gift Landing Page - Design System */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Primary Colors */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  
  /* Secondary Colors */
  --color-secondary: #f472b6;
  --color-secondary-dark: #db2777;
  --color-secondary-light: #f9a8d4;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Gradient Definitions */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
  --gradient-hero: linear-gradient(135deg, rgba(99, 102, 241, 0.95) 0%, rgba(79, 70, 229, 0.95) 100%);
  
  /* Spacing Scale */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-gray-900);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
}

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

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

p {
  line-height: 1.7;
  color: var(--color-gray-600);
}

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

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

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

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: inherit;
  font-size: 1.125rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
  border: 2px solid var(--color-primary);
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  padding: 1rem 0;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  color: var(--color-gray-700);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('https://images.unsplash.com/photo-1511379938547-c1f69419868d?w=1920&q=80') center/cover;
  opacity: 0.1;
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  color: var(--color-gray-600);
}

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

/* Section Styles */
section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  font-size: 1.125rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.feature-card h3 {
  margin-bottom: var(--spacing-sm);
}

/* How It Works */
.how-it-works {
  background: var(--color-gray-50);
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.step-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  position: relative;
}

.step-number {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.step-card h3 {
  margin-bottom: var(--spacing-sm);
}

/* Pricing */
.pricing-section {
  background: var(--color-gray-50);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: var(--spacing-xl) auto 0;
}

.pricing-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.pricing-card.featured {
  border: 3px solid var(--color-primary);
  transform: scale(1.05);
}

.pricing-badge {
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--spacing-xs) var(--spacing-lg);
  font-weight: 600;
  font-size: 0.875rem;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: var(--spacing-md) 0;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--color-gray-500);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin: var(--spacing-lg) 0;
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
}

/* Testimonials */
.testimonials {
  background: var(--gradient-hero);
  color: var(--color-white);
  padding: var(--spacing-2xl) 0;
}

.testimonials .section-header h2 {
  color: var(--color-white);
}

.testimonials .section-header p {
  color: rgba(255, 255, 255, 0.9);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: var(--spacing-md);
  color: rgba(255, 255, 255, 0.95);
}

.testimonial-author {
  font-weight: 600;
  color: var(--color-white);
}

.testimonial-role {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
}

/* CTA Section */
.cta-section {
  background: var(--color-gray-50);
  text-align: center;
}

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

/* Footer */
footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

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

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--color-white);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-gray-800);
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .nav-links {
    gap: var(--spacing-md);
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.125rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .pricing-card.featured {
    transform: none;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .hero-buttons,
  footer {
    display: none;
  }
  
  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
  
  section {
    page-break-inside: avoid;
    padding: 1rem 0;
  }
  
  body {
    font-size: 12pt;
  }
  
  .feature-card,
  .step-card,
  .pricing-card,
  .testimonial-card {
    page-break-inside: avoid;
    border: 1px solid var(--color-gray-300);
    box-shadow: none;
  }
  
  @page {
    margin: 1cm;
  }
}