* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  color: #1a1a1a;
  line-height: 1.6;
  background: #ffffff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  border-bottom: 1px solid #e5e7eb;
  padding: 20px 0;
  background: #ffffff;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  font-size: 24px;
  font-weight: 700;
  color: #0066cc;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  text-decoration: none;
  color: #6b7280;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: #0066cc;
}

.hero {
  padding: 80px 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #0f172a;
}

.hero-subtitle {
  font-size: 20px;
  color: #475569;
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 16px;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.2s;
}

.btn-primary {
  background: #0066cc;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
}

.btn-primary:hover {
  background: #0052a3;
  box-shadow: 0 6px 16px rgba(0, 102, 204, 0.3);
}

.btn-secondary {
  background: #ffffff;
  color: #0066cc;
  border: 2px solid #0066cc;
}

.btn-secondary:hover {
  background: #f0f9ff;
}

.hero-image img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.trust-bar {
  padding: 40px 0;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.trust-label {
  text-align: center;
  color: #9ca3af;
  font-size: 14px;
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.trust-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.trust-logo {
  height: 32px;
  opacity: 0.6;
  filter: grayscale(100%);
  transition: all 0.3s;
}

.trust-logo:hover {
  opacity: 1;
  filter: grayscale(0%);
}

.features {
  padding: 80px 0;
  background: #ffffff;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: #0f172a;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.feature-card {
  padding: 32px;
  background: #f8fafc;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: #0066cc;
  box-shadow: 0 8px 24px rgba(0, 102, 204, 0.1);
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #0f172a;
}

.feature-card p {
  color: #64748b;
  line-height: 1.7;
}

.data-flow {
  padding: 80px 0;
  background: #f8fafc;
}

.flow-diagram {
  margin-bottom: 48px;
  text-align: center;
}

.flow-diagram img {
  max-width: 800px;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step {
  text-align: center;
}

.step-number {
  display: inline-block;
  width: 48px;
  height: 48px;
  line-height: 48px;
  background: #0066cc;
  color: #ffffff;
  border-radius: 50%;
  font-weight: 700;
  margin-bottom: 16px;
}

.step h4 {
  font-size: 18px;
  margin-bottom: 8px;
  color: #0f172a;
}

.step p {
  color: #64748b;
  font-size: 14px;
}

.deliverables {
  padding: 80px 0;
  background: #ffffff;
}

.deliverable-list {
  max-width: 800px;
  margin: 0 auto;
}

.deliverable-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  margin-bottom: 16px;
  background: #f8fafc;
  border-radius: 12px;
  border-left: 4px solid #0066cc;
}

.deliverable-check {
  font-size: 24px;
  color: #10b981;
  font-weight: 700;
}

.deliverable-item h4 {
  font-size: 18px;
  margin-bottom: 6px;
  color: #0f172a;
}

.deliverable-item p {
  color: #64748b;
  font-size: 15px;
}

.page-header {
  padding: 60px 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
  text-align: center;
}

.page-header h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #0f172a;
}

.page-subtitle {
  font-size: 18px;
  color: #64748b;
}

.timeline {
  padding: 80px 0;
  background: #ffffff;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 40px;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid #e5e7eb;
}

.timeline-item:last-child {
  border-bottom: none;
}

.timeline-marker {
  font-weight: 700;
  font-size: 18px;
  color: #0066cc;
  padding-top: 4px;
}

.timeline-content h3 {
  font-size: 24px;
  margin-bottom: 8px;
  color: #0f172a;
}

.timeline-duration {
  color: #9ca3af;
  font-size: 14px;
  margin-bottom: 16px;
}

.timeline-tasks {
  list-style: none;
  margin-bottom: 24px;
}

.timeline-tasks li {
  padding-left: 24px;
  position: relative;
  margin-bottom: 8px;
  color: #475569;
}

.timeline-tasks li:before {
  content: "•";
  position: absolute;
  left: 0;
  color: #0066cc;
  font-weight: 700;
}

.timeline-tech img {
  max-width: 400px;
  width: 100%;
  border-radius: 8px;
  margin-top: 16px;
}

.code-snippet {
  background: #1e293b;
  padding: 20px;
  border-radius: 8px;
  margin-top: 16px;
}

.code-snippet pre {
  color: #e2e8f0;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
}

.endpoint-list {
  margin-top: 16px;
}

.endpoint {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: #f1f5f9;
  border-radius: 6px;
  margin-bottom: 8px;
}

.method {
  background: #10b981;
  color: #ffffff;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
}

.endpoint code {
  color: #475569;
  font-family: 'Courier New', monospace;
  font-size: 14px;
}

.tech-stack {
  padding: 80px 0;
  background: #f8fafc;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tech-card {
  padding: 24px;
  background: #ffffff;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  text-align: center;
}

.tech-card h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: #0f172a;
}

.tech-card p {
  color: #64748b;
  font-size: 14px;
}

.cta-section {
  padding: 80px 0;
  background: #0066cc;
  text-align: center;
  color: #ffffff;
}

.cta-section h2 {
  font-size: 36px;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 18px;
  margin-bottom: 32px;
  opacity: 0.9;
}

.cta-section .btn-primary {
  background: #ffffff;
  color: #0066cc;
}

.cta-section .btn-primary:hover {
  background: #f0f9ff;
}

.auth-flow {
  padding: 80px 0;
  background: #ffffff;
}

.auth-diagram {
  text-align: center;
  margin-bottom: 48px;
}

.auth-diagram img {
  max-width: 700px;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.flow-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.flow-card {
  padding: 24px;
  background: #f8fafc;
  border-radius: 12px;
  border-top: 4px solid #0066cc;
}

.flow-number {
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  background: #0066cc;
  color: #ffffff;
  border-radius: 50%;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}

.flow-card h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: #0f172a;
}

.flow-card p {
  color: #64748b;
  font-size: 14px;
  line-height: 1.6;
}

.credentials {
  padding: 80px 0;
  background: #f8fafc;
}

.credential-table {
  max-width: 900px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.table-header {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #0066cc;
  color: #ffffff;
  font-weight: 600;
  padding: 16px 24px;
}

.table-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 16px 24px;
  border-bottom: 1px solid #e5e7eb;
}

.table-row:last-child {
  border-bottom: none;
}

.table-cell {
  font-size: 14px;
}

.postman-config {
  padding: 80px 0;
  background: #ffffff;
}

.config-steps {
  max-width: 900px;
  margin: 0 auto;
}

.config-step {
  margin-bottom: 48px;
}

.config-step h4 {
  font-size: 22px;
  margin-bottom: 16px;
  color: #0f172a;
}

.variable-list {
  background: #f8fafc;
  border-radius: 8px;
  padding: 20px;
}

.variable-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid #e2e8f0;
}

.variable-item:last-child {
  border-bottom: none;
}

.variable-item code {
  font-family: 'Courier New', monospace;
  color: #0066cc;
  font-weight: 600;
}

.variable-item span {
  color: #64748b;
  font-size: 14px;
}

.code-block {
  background: #1e293b;
  padding: 24px;
  border-radius: 8px;
  overflow-x: auto;
}

.code-block pre {
  color: #e2e8f0;
  font-family: 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.7;
}

.config-note {
  color: #64748b;
  font-size: 15px;
  line-height: 1.7;
}

.config-note strong {
  color: #0f172a;
}

.config-note code {
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  color: #0066cc;
  font-size: 14px;
}

.security {
  padding: 80px 0;
  background: #f8fafc;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.security-item {
  padding: 24px;
  background: #ffffff;
  border-radius: 8px;
  border-left: 4px solid #ef4444;
}

.security-item h4 {
  font-size: 18px;
  margin-bottom: 8px;
  color: #0f172a;
}

.security-item p {
  color: #64748b;
  font-size: 14px;
  line-height: 1.7;
}

.footer {
  padding: 40px 0;
  background: #0f172a;
  color: #94a3b8;
  text-align: center;
}

.footer p {
  margin-bottom: 8px;
}

.footer-note {
  font-size: 14px;
  opacity: 0.7;
}

@media (max-width: 768px) {
  .hero .container,
  .feature-grid,
  .flow-steps,
  .flow-cards,
  .tech-grid,
  .security-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .nav {
    gap: 16px;
  }
  
  .hero h1 {
    font-size: 32px;
  }
  
  .section-title {
    font-size: 28px;
  }
}