:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --background-color: #f8fafc;
  --background-secondary: #f1f5f9;
  --text-color: #1e293b;
  --text-muted: #64748b;
  --card-background: #ffffff;
  --border-color: #e2e8f0;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

* {
  box-sizing: border-box;
}

body {
  background: linear-gradient(135deg, var(--background-color) 0%, var(--background-secondary) 100%);
  color: var(--text-color);
  font-family: var(--font-family);
  line-height: 1.5;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.navbar {
  backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.95) !important;
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-color) !important;
  letter-spacing: -0.015em;
}

.nav-link {
  font-weight: 500;
  color: var(--text-color) !important;
  transition: color 0.2s ease;
}

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

.display-4, .display-5 {
  font-weight: 700;
  color: var(--text-color);
  letter-spacing: -0.02em;
  font-size: 2.8rem;
}

.lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 400;
}

.container {
  max-width: 1200px;
}

.card {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: linear-gradient(145deg, #ffffff 0%, #fafbfc 100%);
  box-shadow: var(--shadow);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color) 0%, #8b5cf6 50%, #ec4899 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover::before {
  opacity: 1;
}

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

.card-offer {
  position: relative;
}

.card-img-top {
  height: 160px;
  object-fit: contain;
  padding: 1.25rem;
  background: linear-gradient(135deg, var(--background-secondary) 0%, rgba(37, 99, 235, 0.03) 100%);
  transition: transform 0.3s ease;
}

.card:hover .card-img-top {
  transform: scale(1.05);
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.card-title a {
  text-decoration: none;
  color: var(--text-color);
  transition: color 0.2s ease;
}

.card-title a:hover {
  color: var(--primary-color);
}

.card-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.4;
  margin-bottom: 1.25rem;
}

.btn {
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, #1e40af 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  color: white;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 700;
}

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

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

.footer {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  color: #e2e8f0;
  margin-top: 4rem;
}

.footer a {
  color: #cbd5e1 !important;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: #f1f5f9 !important;
}

.copy-code-btn {
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-code-btn:hover {
  transform: scale(1.05);
}

.input-group {
  box-shadow: var(--shadow-sm);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

.form-control {
  border: 2px solid var(--border-color);
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.025em;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.alert {
  border: none;
  border-radius: var(--border-radius);
  border-left: 4px solid;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-left-color: var(--warning-color);
  color: #92400e;
}

.alert-heading {
  font-weight: 700;
  color: #92400e;
}

.bg-light {
  background: var(--background-secondary) !important;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

.text-muted {
  color: var(--text-muted) !important;
}

.shadow-sm {
  box-shadow: var(--shadow-sm) !important;
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .card-body {
    padding: 1.25rem;
  }
  
  .display-4, .display-5 {
    font-size: 2.2rem;
  }
  
  .lead {
    font-size: 1.1rem;
  }
  
  .btn-lg {
    padding: 0.8rem 1.3rem;
    font-size: 0.95rem;
  }
  
  .input-group {
    width: 100% !important;
  }
}

.hero-section {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(59, 130, 246, 0.1) 100%);
  border-radius: var(--border-radius);
  padding: 3rem 2rem;
  margin-bottom: 3rem;
  text-align: center;
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.offer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .offer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .offer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.offer-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
  z-index: 2;
}