/* DEX Documentation - Minimalist Professional Design */

:root {
  --color-primary: #1a365d;
  --color-primary-light: #2c5282;
  --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;
  --color-white: #ffffff;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Monaco, Consolas, monospace;
  --max-width: 1200px;
  --border-radius: 6px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-white);
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.logo {
  font-size: 1.25rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-white);
}

.logo span {
  font-weight: 300;
  opacity: 0.8;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: var(--color-white);
  text-decoration: none;
  font-size: 0.9rem;
  opacity: 0.9;
  transition: opacity 0.2s;
}

nav a:hover {
  opacity: 1;
}

/* Main Content */
main {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 3rem 0;
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1.125rem;
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-gray-900);
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; border-bottom: 2px solid var(--color-gray-200); padding-bottom: 0.5rem; margin-top: 2rem; }
h3 { font-size: 1.25rem; margin-top: 1.5rem; }
h4 { font-size: 1.125rem; }

p {
  margin-bottom: 1rem;
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border-color: var(--color-gray-300);
}

.card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

.card p {
  color: var(--color-gray-600);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.card-link:hover {
  text-decoration: none;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-200);
}

th {
  background-color: var(--color-gray-50);
  font-weight: 600;
  color: var(--color-gray-700);
}

tr:hover {
  background-color: var(--color-gray-50);
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-gray-100);
  padding: 0.2em 0.4em;
  border-radius: 3px;
}

pre {
  background-color: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

pre code {
  background: none;
  padding: 0;
}

/* Mermaid Diagrams */
.mermaid {
  background-color: var(--color-white);
  padding: 1.5rem;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  margin: 1.5rem 0;
  overflow-x: auto;
}

/* Info Boxes */
.info-box {
  background-color: var(--color-gray-50);
  border-left: 4px solid var(--color-primary);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.info-box h4 {
  color: var(--color-primary);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.info-box p:last-child {
  margin-bottom: 0;
}

/* Tags */
.tag {
  display: inline-block;
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  font-size: 0.8rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

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

/* Breadcrumb */
.breadcrumb {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--color-gray-500);
}

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

.breadcrumb span {
  margin: 0 0.5rem;
}

/* Flow Detail Page */
.flow-header {
  background-color: var(--color-gray-50);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
}

.flow-header h1 {
  margin-bottom: 0.5rem;
}

.flow-meta {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--color-gray-600);
}

.flow-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.flow-meta-item strong {
  color: var(--color-gray-700);
}

/* Steps List */
.steps-list {
  list-style: none;
  counter-reset: step;
}

.steps-list li {
  counter-increment: step;
  position: relative;
  padding-left: 3rem;
  padding-bottom: 1.5rem;
  border-left: 2px solid var(--color-gray-200);
  margin-left: 0.75rem;
}

.steps-list li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.steps-list li::before {
  content: counter(step);
  position: absolute;
  left: -0.75rem;
  top: 0;
  width: 1.5rem;
  height: 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Footer */
footer {
  background-color: var(--color-gray-50);
  border-top: 1px solid var(--color-gray-200);
  padding: 2rem 0;
  margin-top: 3rem;
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

footer p {
  color: var(--color-gray-500);
  font-size: 0.875rem;
  margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    text-align: center;
  }

  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  table {
    display: block;
    overflow-x: auto;
  }

  .flow-meta {
    flex-direction: column;
    gap: 0.75rem;
  }

  footer .container {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.125rem; }
}