:root {
  /* Colors */
  --color-primary: #F97316;
  --color-primary-dark: #EA580C;
  --color-primary-light: #FB923C;
  --color-accent: #2563EB;
  --color-accent-dark: #1E40AF;
  --color-success: #10B981;
  --color-warning: #FBBF24;
  --color-error: #EF4444;
  --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;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;   /* 8px */
  --spacing-sm: 1rem;     /* 16px */
  --spacing-md: 1.5rem;   /* 24px */
  --spacing-lg: 2rem;     /* 32px */
  --spacing-xl: 3rem;     /* 48px */
  --spacing-2xl: 4rem;    /* 64px */
  --spacing-3xl: 6rem;    /* 96px */
  
  /* Borders */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  --border-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);
}

/* Base styles */
body {
  font-family: var(--font-family);
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  line-height: 1.5;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

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

.section-title {
  font-size: 2.25rem;
  text-align: center;
  margin-bottom: var(--spacing-xs);
}

.section-subtitle {
  font-size: 1.125rem;
  text-align: center;
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-lg);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  border-radius: var(--border-radius-md);
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  font-size: 1.125rem;
  min-width: 160px;
}

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

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

.btn-secondary {
  background-color: white;
  color: var(--color-primary);
  border: 3px solid var(--color-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.8rem 1.8rem;
}

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-sm) 0;
  z-index: 100;
  backdrop-filter: blur(5px);
}

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

.logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
}

.logo img {
  height: 28px;
  margin-right: var(--spacing-xs);
}

.nav-links {
  display: none;
}

.nav-link {
  margin-left: var(--spacing-md);
  font-weight: 500;
  color: var(--color-gray-700);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

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

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

.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.bar {
  height: 3px;
  width: 100%;
  background-color: var(--color-gray-800);
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 60px;
  left: 0;
  width: 100%;
  height: 0;
  background-color: white;
  overflow: hidden;
  transition: height 0.3s ease;
  z-index: 99;
  box-shadow: var(--shadow-md);
}

.mobile-menu.active {
  height: auto;
}

.mobile-menu-container {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
}

.mobile-link {
  padding: var(--spacing-sm) 0;
  font-weight: 500;
  color: var(--color-gray-800);
  border-bottom: 1px solid var(--color-gray-200);
}

.mobile-link:last-child {
  border-bottom: none;
}

/* Hero Section */
.hero {
  position: relative;
  padding: calc(70px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  overflow: hidden;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-content {
  text-align: center;
  max-width: 600px;
  margin-bottom: var(--spacing-xl);
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
}

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

.hero-image {
  width: 100%;
  max-width: 400px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image img {
  width: 100%;
  height: auto;
}

/* Features Section */
.features {
  padding: var(--spacing-2xl) 0;
  background-color: white;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.feature-card {
  padding: var(--spacing-lg);
  background-color: var(--color-gray-50);
  border-radius: var(--border-radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  background-color: rgba(249, 115, 22, 0.1);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon img {
  width: 32px;
  height: 32px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--color-gray-600);
}

/* How It Works Section */
.how-it-works {
  padding: var(--spacing-2xl) 0;
  background-color: var(--color-gray-50);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-number {
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  margin-right: var(--spacing-md);
}

.step-content {
  margin-bottom: var(--spacing-md);
}

.step-content h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

.step-content p {
  color: var(--color-gray-600);
}

.step-image {
  width: 100%;
  max-width: 300px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-right: var(--spacing-md)
}

.step-image img {
  width: 100%;
  height: auto;
}

/* App Showcase */
.app-showcase {
  padding: var(--spacing-2xl) 0;
  background-color: white;
}

.app-showcase .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.app-showcase-content {
  text-align: center;
  max-width: 500px;
  margin-bottom: var(--spacing-xl);
}

.app-showcase-text {
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-700);
}

.app-features-list {
  text-align: left;
  margin: var(--spacing-md) 0;
  padding-left: 1.5rem;
}

.app-features-list li {
  position: relative;
  margin-bottom: var(--spacing-xs);
  list-style-type: none;
}

.app-features-list li::before {
  content: '✓';
  position: absolute;
  left: -1.5rem;
  color: var(--color-success);
  font-weight: bold;
}

.app-showcase-image {
  width: 100%;
  max-width: 400px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.app-showcase-image img {
  width: 100%;
  height: auto;
}

/* Testimonials Section */
.testimonials {
  padding: var(--spacing-2xl) 0;
  background-color: var(--color-gray-50);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.testimonial-card {
  background-color: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

.testimonial-rating {
  color: var(--color-warning);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-700);
}

.testimonial-author {
  display: flex;
  align-items: center;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-full);
  object-fit: cover;
  margin-right: var(--spacing-sm);
}

.testimonial-info h4 {
  font-size: 1rem;
  margin-bottom: 0;
}

.testimonial-info p {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* Download Section */
.download {
  padding: var(--spacing-2xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
}

.download .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.download-content {
  text-align: center;
  max-width: 500px;
  margin-bottom: var(--spacing-xl);
}

.download-text {
  margin-bottom: var(--spacing-md);
  opacity: 0.9;
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.download-btn {
  display: block;
}

.download-btn img {
  height: 48px;
  width: auto;
}

.download-image {
  width: 100%;
  max-width: 400px;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.download-image img {
  width: 100%;
  height: auto;
}

/* Footer */
.footer {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  background-color: var(--color-gray-800);
  color: white;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-sm);
}

.footer-logo img {
  height: 28px;
  margin-right: var(--spacing-xs);
  filter: brightness(0) invert(1);
}

.footer-tagline {
  opacity: 0.7;
  margin-bottom: var(--spacing-sm);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.social-link img {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1);
  transition: opacity 0.3s ease;
}

.social-link:hover img {
  opacity: 0.7;
}

.footer-heading {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  position: relative;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--color-primary-light);
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: white;
}

.footer-contact li {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.footer-contact img {
  width: 20px;
  height: 20px;
  margin-right: var(--spacing-sm);
  filter: brightness(0) invert(1);
}

.footer-contact a,
.footer-contact address {
  color: rgba(255, 255, 255, 0.7);
  font-style: normal;
}

.footer-contact a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Media Queries */
@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.5rem;
  }
  
  .section-subtitle {
    font-size: 1.25rem;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  .nav-links {
    display: flex;
  }
  
  .menu-toggle {
    display: none;
  }
  
  .step {
    flex-direction: row;
    text-align: left;
    align-items: center;
  }
  
  .step:nth-child(even) {
    flex-direction: row-reverse;
  }
  
  .step-content {
    flex: 1;
    margin-bottom: 0;
  }
  
  .step-image {
    flex: 1;
  }
  
  .app-showcase .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .app-showcase-content {
    text-align: left;
    margin-bottom: 0;
    margin-right: var(--spacing-lg);
  }
  
  .download .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .download-content {
    text-align: left;
    margin-bottom: 0;
    margin-right: var(--spacing-lg);
  }
  
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  .hero-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .hero-content {
    text-align: left;
    margin-bottom: 0;
    margin-right: var(--spacing-xl);
  }
  
  .hero-title {
    font-size: 3.5rem;
  }
  
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}