/* ==========================================================================
   Agent Engineer — Vercel-inspired design system
   Scoped to /agents/ pages only via body.agents-page
   ========================================================================== */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- CSS Variables ---------- */
body.agents-page {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, monospace;

  /* Neutrals — Vercel gray scale */
  --gray-50:  #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-300: #d4d4d4;
  --gray-400: #a3a3a3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --gray-800: #262626;
  --gray-900: #171717;
  --gray-950: #0a0a0a;

  /* Accent */
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  /* Surfaces */
  --bg-primary: #fff;
  --bg-secondary: var(--gray-50);
  --bg-code: var(--gray-950);
  --border-color: var(--gray-200);
  --border-subtle: var(--gray-100);

  /* Text */
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-tertiary: var(--gray-400);
  --text-link: var(--gray-900);
  --text-link-hover: var(--blue-600);

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* ---------- Base ---------- */
body.agents-page {
  font-family: var(--font-sans);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  background: var(--bg-primary);
}

body.agents-page #wrapper {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ---------- Typography ---------- */
body.agents-page h1 {
  font-family: var(--font-sans);
  font-size: 60px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

body.agents-page h2 {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 24px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

body.agents-page h3 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

body.agents-page h4 {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

body.agents-page p {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-4);
}

body.agents-page strong, body.agents-page b {
  font-weight: 600;
  color: var(--text-primary);
}

body.agents-page a {
  color: var(--text-link);
  text-decoration: underline;
  text-decoration-color: var(--gray-300);
  text-underline-offset: 3px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

body.agents-page a:hover {
  color: var(--text-link-hover);
  text-decoration-color: var(--blue-600);
}

/* ---------- Lists ---------- */
body.agents-page ul,
body.agents-page ol {
  margin: 0 0 var(--space-5) 0;
  padding-left: var(--space-6);
}

body.agents-page li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

body.agents-page li > ul,
body.agents-page li > ol {
  margin-top: var(--space-2);
  margin-bottom: 0;
}

body.agents-page li strong {
  color: var(--text-primary);
}

/* ---------- Horizontal rules ---------- */
body.agents-page hr {
  border: none;
  height: 1px;
  background: var(--border-color);
  margin: var(--space-10) 0;
}

/* ---------- Blockquotes ---------- */
body.agents-page blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-5);
  border-left: 3px solid var(--gray-200);
  background: var(--bg-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

body.agents-page blockquote p {
  color: var(--text-secondary);
  margin-bottom: 0;
  font-size: 14px;
}

/* ---------- Tables ---------- */
body.agents-page table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
  font-size: 14px;
}

body.agents-page thead th {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

body.agents-page tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  line-height: 1.5;
}

body.agents-page tbody tr:last-child td {
  border-bottom: none;
}

body.agents-page tbody tr:hover {
  background: var(--bg-secondary);
}

/* ---------- Code — inline ---------- */
body.agents-page code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--gray-100);
  color: var(--gray-800);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--gray-200);
  word-break: break-word;
}

/* ---------- Code — blocks ---------- */
body.agents-page pre {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  background: var(--bg-code) !important;
  color: #e5e7eb !important;
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-800);
  overflow-x: auto;
  margin-bottom: var(--space-5);
  -webkit-overflow-scrolling: touch;
}

body.agents-page pre code {
  font-family: var(--font-mono);
  background: none !important;
  color: inherit !important;
  padding: 0;
  border: none;
  border-radius: 0;
  font-size: 13px;
}

body.agents-page div.highlighter-rouge {
  margin-bottom: var(--space-5);
  border-radius: var(--radius-md);
  overflow: hidden;
}

body.agents-page .highlighter-rouge .highlight {
  background: var(--bg-code) !important;
  margin: 0;
}

body.agents-page .highlighter-rouge .highlight pre.highlight {
  background: transparent !important;
  border: none;
  margin: 0;
}

/* Syntax highlighting — One Dark inspired, muted tones */
body.agents-page .highlight .k,
body.agents-page .highlight .kd,
body.agents-page .highlight .kn,
body.agents-page .highlight .kp,
body.agents-page .highlight .kr,
body.agents-page .highlight .kt,
body.agents-page .highlight .kc { color: #c678dd; }

body.agents-page .highlight .s,
body.agents-page .highlight .s1,
body.agents-page .highlight .s2,
body.agents-page .highlight .se,
body.agents-page .highlight .sh,
body.agents-page .highlight .sx { color: #98c379; }

body.agents-page .highlight .c,
body.agents-page .highlight .c1,
body.agents-page .highlight .cm,
body.agents-page .highlight .cs,
body.agents-page .highlight .cp { color: #5c6370; font-style: italic; }

body.agents-page .highlight .nf,
body.agents-page .highlight .nc,
body.agents-page .highlight .nn,
body.agents-page .highlight .ni { color: #61afef; }

body.agents-page .highlight .na { color: #d19a66; }
body.agents-page .highlight .nb,
body.agents-page .highlight .bp { color: #e5c07b; }

body.agents-page .highlight .no,
body.agents-page .highlight .nv,
body.agents-page .highlight .vi,
body.agents-page .highlight .vc,
body.agents-page .highlight .vg { color: #e06c75; }

body.agents-page .highlight .mi,
body.agents-page .highlight .mf,
body.agents-page .highlight .mh,
body.agents-page .highlight .mo,
body.agents-page .highlight .il { color: #d19a66; }

body.agents-page .highlight .o,
body.agents-page .highlight .ow { color: #56b6c2; }
body.agents-page .highlight .p { color: #abb2bf; }
body.agents-page .highlight .sr { color: #e9c062; }

body.agents-page .highlight .gd { color: #e06c75; }
body.agents-page .highlight .gi { color: #98c379; }
body.agents-page .highlight .ge { font-style: italic; }
body.agents-page .highlight .gs { font-weight: bold; }
body.agents-page .highlight .err { color: #e06c75; }

/* ---------- Images ---------- */
body.agents-page img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

/* ==========================================================================
   Course Index Page — Hero & lesson list
   ========================================================================== */

/* --- Hero --- */
body.agents-page .course-hero {
  text-align: center;
  padding: var(--space-16) 0 var(--space-12);
  margin-bottom: var(--space-10);
  position: relative;
}

body.agents-page .course-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 1px;
  background: var(--border-color);
}

body.agents-page .course-hero h1 {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  padding-bottom: 0.05em;
  background: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.agents-page .course-hero .subtitle {
  font-size: 20px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto var(--space-6);
}

body.agents-page .course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-6);
}

body.agents-page .course-meta .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  padding: 5px 14px;
  letter-spacing: -0.01em;
}

body.agents-page .course-meta .badge svg {
  width: 14px;
  height: 14px;
  stroke: var(--gray-400);
  fill: none;
  stroke-width: 2;
}

/* --- Hero action buttons --- */
body.agents-page .hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  align-items: center;
  margin-top: var(--space-8);
}

body.agents-page .hero-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: #fff !important;
  background: var(--gray-900);
  border: 1px solid var(--gray-900);
  border-radius: 100px;
  padding: 12px 32px;
  text-decoration: none !important;
  transition: all 0.15s ease;
}

body.agents-page .hero-btn-primary:hover {
  background: var(--gray-700);
  border-color: var(--gray-700);
  color: #fff !important;
  text-decoration: none !important;
}

body.agents-page .hero-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary) !important;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  padding: 12px 32px;
  text-decoration: none !important;
  transition: all 0.15s ease;
}

body.agents-page .hero-btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--gray-300);
  text-decoration: none !important;
}

body.agents-page .hero-btn-secondary svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: var(--gray-500);
  stroke-width: 2;
}

/* --- Course navigation pills --- */
body.agents-page .course-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  justify-content: center;
  margin-bottom: var(--space-10);
  padding: 4px;
  background: var(--gray-100);
  border-radius: var(--radius-md);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

body.agents-page .course-nav a {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.15s ease;
}

body.agents-page .course-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-primary);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

/* --- Section headers --- */
body.agents-page .course-section h2 {
  font-family: var(--font-sans) !important;
  font-style: normal !important;
  font-size: 12px !important;
  font-weight: 600 !important;
  line-height: 1 !important;
  color: var(--text-tertiary) !important;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0;
  margin-top: var(--space-10);
}

/* --- Lesson cards --- */
body.agents-page .lesson {
  display: flex;
  gap: var(--space-4);
  align-items: baseline;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.15s ease;
}

body.agents-page .lesson:last-child {
  border-bottom: none;
}

body.agents-page .lesson:hover {
  /* subtle highlight on hover */
}

body.agents-page .lesson-number {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-tertiary);
  min-width: 28px;
  flex-shrink: 0;
}

body.agents-page .lesson-body {
  flex: 1;
}

body.agents-page .lesson h3 {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 0 0 4px;
}

body.agents-page .lesson h3 a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

body.agents-page .lesson h3 a:hover {
  color: var(--text-link-hover);
}

body.agents-page .lesson p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-tertiary);
  margin-bottom: 0;
}

/* --- Info boxes (philosophy, how-to) --- */
body.agents-page .course-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-6);
  margin: var(--space-6) 0;
}

body.agents-page .course-card h2 {
  font-size: 15px !important;
  font-weight: 600 !important;
  font-style: normal !important;
  color: var(--text-primary) !important;
  text-transform: none !important;
  letter-spacing: -0.01em !important;
  border: none !important;
  padding: 0 !important;
  margin: 0 0 var(--space-3) !important;
}

body.agents-page .course-card ul {
  margin: 0;
  padding-left: var(--space-5);
}

body.agents-page .course-card li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

body.agents-page .course-card li:last-child {
  margin-bottom: 0;
}

body.agents-page .course-card li strong {
  font-weight: 600;
  color: var(--text-primary);
}

/* --- Footer --- */
body.agents-page .course-footer {
  text-align: center;
  font-size: 14px;
  color: var(--text-tertiary);
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-color);
}

body.agents-page .course-footer a {
  color: var(--text-primary);
  font-weight: 500;
}

/* ==========================================================================
   Lesson Pages — Article typography
   ========================================================================== */

/* --- Lesson header --- */
body.agents-page .lesson-header {
  margin-bottom: var(--space-10);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border-color);
}

body.agents-page .lesson-header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-3);
}

body.agents-page .lesson-header .lesson-meta {
  font-size: 14px;
  color: var(--text-tertiary);
}

/* --- Back link --- */
body.agents-page .back-to-course {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: var(--space-8);
  transition: color 0.15s ease;
}

body.agents-page .back-to-course:hover {
  color: var(--text-primary);
  text-decoration: none;
}

body.agents-page .back-to-course svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

/* --- Key takeaways / callout boxes --- */
body.agents-page .key-takeaways,
body.agents-page blockquote:first-of-type {
  /* styles are in blockquote above */
}

/* --- Lesson navigation (prev/next) --- */
body.agents-page .lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-color);
}

body.agents-page .lesson-nav a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
  padding: var(--space-4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
  flex: 1;
  max-width: 48%;
}

body.agents-page .lesson-nav a:hover {
  border-color: var(--gray-300);
  background: var(--bg-secondary);
}

body.agents-page .lesson-nav a .label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

body.agents-page .lesson-nav a .title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

body.agents-page .lesson-nav a.next {
  text-align: right;
  margin-left: auto;
}

/* ==========================================================================
   Navigation override for agents pages
   ========================================================================== */
body.agents-page nav.main-nav a {
  text-decoration: none;
}
/* body.agents-page nav.main-nav {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

body.agents-page nav.main-nav a {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
}

body.agents-page nav.main-nav a:hover {
  color: var(--text-primary);
}

body.agents-page nav.main-nav a.cta {
  background: var(--gray-900);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 500;
  padding: 6px 14px;
}

body.agents-page nav.main-nav a.cta:hover {
  background: var(--gray-700);
  color: #fff;
} */

/* ==========================================================================
   Responsive
   ========================================================================== */
@media only screen and (max-width: 640px) {
  body.agents-page #wrapper {
    padding: 32px 16px 60px;
  }

  body.agents-page .course-hero h1 {
    font-size: 36px;
  }

  body.agents-page .course-hero .subtitle {
    font-size: 15px;
  }

  body.agents-page .hero-actions {
    flex-direction: column;
    gap: var(--space-3);
  }

  body.agents-page .hero-btn-primary,
  body.agents-page .hero-btn-secondary {
    width: 100%;
    justify-content: center;
  }

  body.agents-page .course-meta {
    gap: var(--space-2);
  }

  body.agents-page .course-nav {
    width: auto;
  }

  body.agents-page .lesson {
    flex-direction: column;
    gap: var(--space-1);
  }

  body.agents-page .lesson-nav {
    flex-direction: column;
  }

  body.agents-page .lesson-nav a {
    max-width: 100%;
  }

  body.agents-page h1 {
    font-size: 28px;
  }

  body.agents-page h2 {
    font-size: 22px;
  }

  body.agents-page h3 {
    font-size: 17px;
  }

  body.agents-page pre {
    font-size: 12px;
    padding: var(--space-4);
    border-radius: var(--radius-sm);
  }
}