/* ================================================================
   DEX Dashboard — Documentation Styles
   Dark theme matching the main application
   ================================================================ */

/* ── Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-card: #1a1a1a;
  --bg-hover: #222;
  --text-primary: #f5f5f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-blue: #3b82f6;
  --accent-emerald: #22c55e;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;
  --border: #27272a;
  --radius: 0.625rem;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 1.75rem; margin-bottom: 0.75rem; margin-top: 2rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; margin-top: 1.5rem; }

p { margin-bottom: 1rem; }
a { color: var(--accent-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-hover);
  padding: 0.2em 0.4em;
  border-radius: 4px;
}

pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li { margin-bottom: 0.25rem; }

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td { color: var(--text-primary); }

blockquote {
  border-left: 3px solid var(--accent-blue);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
}

blockquote p { margin: 0; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ── Layout ── */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Header / Nav ── */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary);
  text-decoration: none;
}

.brand:hover { text-decoration: none; }
.brand-blue { color: var(--accent-blue); }
.brand-muted { color: var(--text-muted); }

.nav-links {
  display: flex;
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-hover);
  text-decoration: none;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.25rem;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem;
  }
}

/* ── Hero Section ── */
.hero {
  padding: 5rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero h1 .gradient {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-emerald));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Cards ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all 0.2s;
}

.card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.card h3 { margin-top: 0; }
.card p { color: var(--text-secondary); font-size: 0.9rem; }

/* ── Content Sections ── */
.content-section {
  padding: 2rem 0;
}

.content-section ul li strong {
  color: var(--text-primary);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--accent-blue);
  color: white;
}

.btn-primary:hover {
  background: #2563eb;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

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

/* ── Callout Boxes (Info / Warning / Success) ── */
.qa-callout {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  border-radius: var(--radius);
  font-size: 0.85rem;
  align-items: flex-start;
}
.qa-callout-info {
  background: rgba(59, 130, 246, 0.1);
  border-left: 3px solid var(--accent-blue);
}
.qa-callout-warning {
  background: rgba(245, 158, 11, 0.1);
  border-left: 3px solid var(--accent-amber);
}
.qa-callout-success {
  background: rgba(34, 197, 94, 0.1);
  border-left: 3px solid var(--accent-emerald);
}
.qa-callout-icon { font-size: 1.1rem; flex-shrink: 0; }
.qa-callout p { margin: 0; }

/* ── Page Navigation (Prev / Next) ── */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin: 3rem 0 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.page-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s;
  max-width: 45%;
}

.page-nav-link:hover {
  border-color: var(--accent-blue);
  text-decoration: none;
  transform: translateY(-1px);
}

.page-nav-link .nav-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
}

.page-nav-link .nav-title {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-nav-link.next {
  text-align: right;
}

.page-nav-link.disabled {
  opacity: 0.4;
  pointer-events: none;
}

@media (max-width: 640px) {
  .page-nav {
    flex-direction: column;
  }
  .page-nav-link {
    max-width: 100%;
    width: 100%;
  }
}

/* ── Breadcrumbs ── */
.breadcrumbs {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  padding-top: 1.5rem;
}

.breadcrumbs a {
  color: var(--accent-blue);
}

.breadcrumbs span {
  color: var(--text-muted);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Badge ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-blue {
  background: var(--accent-blue);
  color: white;
}

.badge-green {
  background: var(--accent-emerald);
  color: black;
}

/* ── Utility ── */
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.flex { display: flex; }
.gap-2 { gap: 0.5rem; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }