/* Base Styles */
:root {
  --primary-color: #3b82f6;
  --primary-dark: #2563eb;
  --secondary-color: #64748b;
  --accent-color: #0ea5e9;
  --background-light: #f8fafc;
  --text-dark: #1e293b;
  --text-light: #64748b;
  --white: #ffffff;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--background-light);
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.section {
  padding: 4rem 0;
}

/* Header */
.header {
  background-color: var(--white);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
}

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

/* Hero Section */
.hero {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 4rem 0;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--white);
  color: var(--primary-color);
  border-radius: 0.375rem;
  font-weight: 500;
  transition: var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.card {
  background-color: var(--white);
  border-radius: 0.5rem;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.card-header {
  padding: 1.5rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card-subtitle {
  color: var(--text-light);
  font-size: 0.875rem;
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  background-color: rgba(0, 0, 0, 0.02);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* Tabs */
.tabs {
  margin: 2rem 0;
}

.tab-list {
  display: flex;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  margin-bottom: 1.5rem;
}

.tab {
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  font-weight: 500;
}

.tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Features */
.feature {
  display: flex;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.feature-icon {
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  background-color: rgba(59, 130, 246, 0.1);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 1rem;
  color: var(--primary-color);
}

.feature-content {
  flex-grow: 1;
}

.feature-title {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

/* Code Block */
.code-block {
  background-color: #1e293b;
  color: #e2e8f0;
  padding: 1.5rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: 'Fira Code', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
}

/* Footer */
.footer {
  background-color: #1e293b;
  color: var(--white);
  padding: 3rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-heading {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  color: var(--white);
}

.footer-link {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.5rem;
}

.footer-link:hover {
  color: var(--white);
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .tab-list {
    flex-wrap: wrap;
  }
  
  .tab {
    flex-grow: 1;
    text-align: center;
  }
}

/* Cognitive Architecture Specific Styles */
.cognitive-model {
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin: 1.5rem 0;
  background-color: rgba(59, 130, 246, 0.05);
}

.model-header {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.model-icon {
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 1rem;
  color: var(--white);
}

.model-title {
  font-size: 1.25rem;
  margin-bottom: 0;
}

.model-body {
  padding-left: 3.5rem;
}

/* Context Engineering Specific Styles */
.context-pipeline {
  display: flex;
  flex-wrap: wrap;
  margin: 2rem 0;
}

.pipeline-stage {
  flex: 1;
  min-width: 200px;
  padding: 1rem;
  background-color: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.1);
  position: relative;
}

.pipeline-stage:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--primary-color);
  z-index: 1;
}

.pipeline-stage-title {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

/* Semantic Integrity Specific Styles */
.integrity-meter {
  height: 0.5rem;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 0.25rem;
  margin: 1rem 0;
  overflow: hidden;
}

.integrity-value {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: 0.25rem;
}

/* Audit Trail Specific Styles */
.audit-trail {
  border-left: 2px solid var(--primary-color);
  padding-left: 1.5rem;
  margin: 1.5rem 0;
}

.audit-entry {
  position: relative;
  margin-bottom: 1.5rem;
}

.audit-entry::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.5rem;
  width: 1rem;
  height: 1rem;
  background-color: var(--white);
  border: 2px solid var(--primary-color);
  border-radius: 50%;
}

.audit-timestamp {
  font-size: 0.75rem;
  color: var(--text-light);
  margin-bottom: 0.25rem;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mb-1 {
  margin-bottom: 0.25rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-3 {
  margin-bottom: 1rem;
}

.mb-4 {
  margin-bottom: 1.5rem;
}

.mb-5 {
  margin-bottom: 2rem;
}

.mt-1 {
  margin-top: 0.25rem;
}

.mt-2 {
  margin-top: 0.5rem;
}

.mt-3 {
  margin-top: 1rem;
}

.mt-4 {
  margin-top: 1.5rem;
}

.mt-5 {
  margin-top: 2rem;
}

.bg-primary {
  background-color: var(--primary-color);
  color: var(--white);
}

.bg-light {
  background-color: var(--background-light);
}

.bg-white {
  background-color: var(--white);
}

.rounded {
  border-radius: 0.375rem;
}

.shadow {
  box-shadow: var(--card-shadow);
}

.p-3 {
  padding: 1rem;
}

.p-4 {
  padding: 1.5rem;
}

.p-5 {
  padding: 2rem;
}