/* ============================================================
   RHDP Skills Marketplace — Modern Design System
   Red Hat brand-aligned, built on CSS custom properties
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Red+Hat+Display:wght@400;500;600;700;900&family=Red+Hat+Text:wght@400;500;600&family=Red+Hat+Mono:wght@400;500&display=swap');

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Brand */
  --rh-red:          #EE0000;
  --rh-red-dark:     #C00000;
  --rh-red-darker:   #8A0000;
  --rh-red-light:    #FFEDED;
  --rh-red-subtle:   #FFF5F5;

  /* Neutrals */
  --color-bg:        #FFFFFF;
  --color-surface:   #F8F9FA;
  --color-surface-2: #F2F4F6;
  --color-border:    #E4E7EB;
  --color-border-strong: #CDD0D5;

  /* Text */
  --color-text:      #151515;
  --color-text-2:    #3D3D3D;
  --color-text-3:    #6A6E73;
  --color-text-inv:  #FFFFFF;

  /* Accent blues (for info/link states) */
  --color-blue:      #0066CC;
  --color-blue-light:#E8F2FF;

  /* Greens (success/tip) */
  --color-green:     #3E8635;
  --color-green-light:#F3FAF2;

  /* Yellows (warning) */
  --color-yellow:    #F0AB00;
  --color-yellow-light:#FFF8E1;

  /* Layout */
  --sidebar-width:   272px;
  --content-max:     860px;
  --radius-sm:       4px;
  --radius:          8px;
  --radius-lg:       12px;
  --radius-xl:       16px;

  /* Shadows */
  --shadow-sm:       0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow:          0 4px 12px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-lg:       0 12px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-red:      0 4px 20px rgba(238,0,0,0.20);

  /* Transitions */
  --t-fast:  0.15s ease;
  --t-med:   0.25s ease;
}

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

/* ── Base Typography ────────────────────────────────────────── */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Red Hat Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Red Hat Display', sans-serif;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: 2.25rem; margin-bottom: 1rem; }
h2 { font-size: 1.625rem; margin-bottom: 0.75rem; margin-top: 2.5rem; }
h3 { font-size: 1.25rem;  margin-bottom: 0.5rem;  margin-top: 2rem; }
h4 { font-size: 1rem;     margin-bottom: 0.5rem;  margin-top: 1.5rem; font-weight: 600; }

p  { margin-bottom: 1rem; color: var(--color-text-2); }

a  {
  color: var(--color-blue);
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover { color: var(--rh-red); text-decoration: underline; }

strong { font-weight: 600; color: var(--color-text); }

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--color-text-2);
}
li { margin-bottom: 0.25rem; }

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

/* ── Code ───────────────────────────────────────────────────── */
code {
  font-family: 'Red Hat Mono', 'SFMono-Regular', Consolas, monospace;
  font-size: 0.8125rem;
  background: var(--color-surface-2);
  color: var(--rh-red-dark);
  padding: 0.15em 0.45em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

pre {
  font-family: 'Red Hat Mono', 'SFMono-Regular', Consolas, monospace;
  font-size: 0.8125rem;
  background: #1a1a1a;
  color: #e8e8e8;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: 1.25rem 0;
  line-height: 1.65;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: var(--shadow);
}

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

/* Syntax token colours (used by highlight.js-like inline spans) */
pre .comment  { color: #6a9955; }
pre .string   { color: #ce9178; }
pre .keyword  { color: #569cd6; }
pre .number   { color: #b5cea8; }
pre .operator { color: #d4d4d4; }

/* Code block header bar */
pre::before {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--rh-red), var(--rh-red-dark));
  border-radius: 3px 3px 0 0;
  margin: -1.25rem -1.5rem 1rem;
}

/* ── Tables ─────────────────────────────────────────────────── */
table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5rem 0;
  font-size: 0.9375rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

thead th {
  background: var(--color-text);
  color: var(--color-text-inv);
  font-family: 'Red Hat Display', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.75rem 1rem;
  text-align: left;
  border: none;
}

tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-2);
  vertical-align: top;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: var(--color-surface); }
tbody tr:hover { background: var(--rh-red-subtle); }

/* Overflow wrapper for wide tables */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; }
div[style*="overflow-x"] { border-radius: var(--radius-lg); }

/* ── Page Layout ─────────────────────────────────────────────── */
.docs-container {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--t-med);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }

/* Logo / header strip */
.sidebar-header {
  padding: 1.25rem 1.25rem 1rem;
  background: linear-gradient(135deg, var(--color-text) 0%, #2d2d2d 100%);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.sidebar-logo {
  width: 32px;
  height: 32px;
  background: var(--rh-red);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-logo svg {
  width: 20px;
  height: 20px;
  fill: white;
}

.sidebar-header h2 {
  font-family: 'Red Hat Display', sans-serif;
  font-size: 0.9375rem;
  font-weight: 700;
  color: white;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.sidebar-header span {
  display: block;
  font-size: 0.6875rem;
  font-weight: 400;
  color: rgba(255,255,255,0.55);
  font-family: 'Red Hat Text', sans-serif;
  margin-top: 1px;
}

/* Search */
.sidebar-search {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.search-wrap {
  position: relative;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-3);
  pointer-events: none;
}

.sidebar-search input {
  width: 100%;
  padding: 0.5rem 0.75rem 0.5rem 2.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-family: 'Red Hat Text', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

.sidebar-search input::placeholder { color: var(--color-text-3); }
.sidebar-search input:focus {
  outline: none;
  border-color: var(--rh-red);
  box-shadow: 0 0 0 3px rgba(238,0,0,0.1);
}

/* Nav */
.sidebar-nav {
  flex: 1;
  padding: 0.75rem 0.75rem 1rem;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 0.25rem;
}

.nav-section-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-3);
  padding: 0.875rem 0.75rem 0.375rem;
  display: block;
}

.nav-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-section li { margin: 0; }

.nav-section a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4375rem 0.75rem;
  color: var(--color-text-2);
  font-size: 0.875rem;
  font-family: 'Red Hat Text', sans-serif;
  border-radius: var(--radius);
  transition: background var(--t-fast), color var(--t-fast);
  text-decoration: none;
}

.nav-section a:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
  text-decoration: none;
}

.nav-section a.active {
  background: var(--rh-red-light);
  color: var(--rh-red-dark);
  font-weight: 600;
}

.nav-section a .nav-icon {
  font-size: 0.875rem;
  width: 1.125rem;
  text-align: center;
  flex-shrink: 0;
  opacity: 0.75;
}

/* Role nav highlight block */
.nav-section-roles {
  background: linear-gradient(135deg, var(--rh-red) 0%, var(--rh-red-dark) 100%);
  border-radius: var(--radius);
  padding: 0.625rem 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
}

.nav-section-roles .nav-section-label {
  color: rgba(255,255,255,0.7);
  padding-top: 0.25rem;
}

.nav-section-roles a {
  color: rgba(255,255,255,0.9);
  font-weight: 500;
}

.nav-section-roles a:hover {
  background: rgba(255,255,255,0.15);
  color: white;
}

.nav-section-roles a.active {
  background: rgba(255,255,255,0.2);
  color: white;
}

/* Sidebar footer */
.sidebar-footer {
  padding: 0.875rem 1.25rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.sidebar-footer a {
  color: var(--color-text-3);
  font-size: 0.8125rem;
  font-family: 'Red Hat Text', sans-serif;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  text-decoration: none;
  transition: color var(--t-fast);
}

.sidebar-footer a:hover { color: var(--color-text); }

.sidebar-footer .version {
  font-size: 0.6875rem;
  font-family: 'Red Hat Mono', monospace;
  color: var(--color-text-3);
  background: var(--color-surface-2);
  padding: 0.2em 0.5em;
  border-radius: 99px;
  border: 1px solid var(--color-border);
}

/* ── Mobile bar ──────────────────────────────────────────────── */
.mobile-bar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--color-text);
  z-index: 200;
  align-items: center;
  padding: 0 1rem;
  gap: 1rem;
  box-shadow: var(--shadow);
}

.mobile-bar-title {
  font-family: 'Red Hat Display', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: white;
  flex: 1;
}

.hamburger {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 5px;
  border-radius: var(--radius-sm);
  transition: background var(--t-fast);
}

.hamburger:hover { background: rgba(255,255,255,0.1); }

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: white;
  border-radius: 1px;
  transition: all var(--t-med);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 90;
  backdrop-filter: blur(2px);
}

/* ── Main Content ────────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
  padding: 3rem 3.5rem 4rem;
  max-width: calc(var(--sidebar-width) + var(--content-max) + 7rem);
}

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 5rem 2rem 4.5rem;
  background: linear-gradient(160deg, #0f0f0f 0%, #1a0000 50%, #151515 100%);
  border-radius: var(--radius-xl);
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
}

/* Subtle grid overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* Red glow */
.hero::after {
  content: '';
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(238,0,0,0.18) 0%, transparent 70%);
  pointer-events: none;
}

.hero > * { position: relative; z-index: 1; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(238,0,0,0.15);
  border: 1px solid rgba(238,0,0,0.35);
  color: #ff6b6b;
  padding: 0.3rem 0.875rem;
  border-radius: 99px;
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: 'Red Hat Text', sans-serif;
  letter-spacing: 0.02em;
  margin-bottom: 1.75rem;
}

/* Legacy badge alias */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(238,0,0,0.15);
  border: 1px solid rgba(238,0,0,0.35);
  color: #ff6b6b;
  padding: 0.3rem 0.875rem;
  border-radius: 99px;
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: 'Red Hat Text', sans-serif;
  letter-spacing: 0.02em;
  margin-bottom: 1.75rem;
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 900;
  color: white;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-subtitle, .hero p {
  font-size: 1.1875rem;
  color: rgba(255,255,255,0.6);
  max-width: 620px;
  margin: 0 auto 2.5rem;
  line-height: 1.65;
  font-family: 'Red Hat Text', sans-serif;
}

.hero-actions {
  display: flex;
  gap: 0.875rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6875rem 1.375rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: 'Red Hat Text', sans-serif;
  text-decoration: none;
  transition: all var(--t-med);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--rh-red);
  color: white;
  border-color: var(--rh-red);
}

.btn-primary:hover {
  background: var(--rh-red-dark);
  border-color: var(--rh-red-dark);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-red);
}

.btn-secondary {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.2);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.14);
  color: white;
  border-color: rgba(255,255,255,0.35);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-large {
  padding: 0.875rem 2rem;
  font-size: 1.0625rem;
}

/* ── Reference badge (page-level tag) ───────────────────────── */
.reference-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-blue) 0%, #0050a0 100%);
  color: white;
  padding: 0.35rem 0.875rem;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: 'Red Hat Text', sans-serif;
  margin-bottom: 1.5rem;
}

/* ── Callouts ────────────────────────────────────────────────── */
.callout {
  display: flex;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: var(--radius-lg);
  border-left: 3px solid;
  font-size: 0.9375rem;
}

.callout-icon {
  font-size: 1.125rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.callout-body { flex: 1; }
.callout-body p:last-child { margin-bottom: 0; }

.callout-info {
  background: var(--color-blue-light);
  border-left-color: var(--color-blue);
  color: var(--color-text-2);
}

.callout-tip {
  background: var(--color-green-light);
  border-left-color: var(--color-green);
  color: var(--color-text-2);
}

.callout-warning {
  background: var(--color-yellow-light);
  border-left-color: var(--color-yellow);
  color: var(--color-text-2);
}

.callout-danger {
  background: var(--rh-red-subtle);
  border-left-color: var(--rh-red);
  color: var(--color-text-2);
}

/* ── Sections / Page Chrome ──────────────────────────────────── */
.section {
  margin-bottom: 3.5rem;
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-header h2 {
  font-size: 1.875rem;
  margin-top: 0;
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-text-3);
  margin-bottom: 0;
}

.section-primary {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border: 1px solid var(--color-border);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  margin-bottom: 3.5rem;
}

/* ── Platform Grid ───────────────────────────────────────────── */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.platform-card {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  text-decoration: none;
  color: var(--color-text);
  display: block;
  transition: all var(--t-med);
  position: relative;
  overflow: hidden;
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-border);
  transition: background var(--t-med);
}

.platform-card:hover {
  border-color: var(--rh-red);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: var(--color-text);
}

.platform-card:hover::before {
  background: linear-gradient(90deg, var(--rh-red), var(--rh-red-dark));
}

.platform-icon {
  width: 44px;
  height: 44px;
  background: var(--color-surface-2);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--color-border);
}

.platform-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  margin-top: 0;
}

.platform-card p {
  font-size: 0.9375rem;
  color: var(--color-text-3);
  margin-bottom: 1.25rem;
  line-height: 1.55;
}

.platform-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.platform-action {
  color: var(--rh-red);
  font-size: 0.875rem;
  font-weight: 600;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.platform-note {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-text-3);
}

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2em 0.6em;
  border-radius: 99px;
  font-size: 0.6875rem;
  font-weight: 600;
  font-family: 'Red Hat Text', sans-serif;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-recommended {
  background: var(--color-green-light);
  color: var(--color-green);
  border: 1px solid rgba(62,134,53,0.2);
}

.badge-new {
  background: var(--color-blue-light);
  color: var(--color-blue);
  border: 1px solid rgba(0,102,204,0.2);
}

.badge-red {
  background: var(--rh-red-light);
  color: var(--rh-red-dark);
  border: 1px solid rgba(238,0,0,0.15);
}

/* ── Category / Feature Cards ────────────────────────────────── */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.category-card {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  transition: all var(--t-med);
}

.category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--rh-red);
}

.category-icon {
  font-size: 1.75rem;
  margin-bottom: 0.875rem;
  display: block;
}

.category-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
  margin-top: 0;
}

.category-card p {
  color: var(--color-text-3);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.category-card a {
  color: var(--rh-red);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}

.category-card a:hover { text-decoration: underline; }

/* Highlight (dark red) variant */
.category-card-highlight {
  background: linear-gradient(135deg, var(--rh-red) 0%, var(--rh-red-dark) 100%);
  border-color: var(--rh-red);
  color: white;
}

.category-card-highlight h3,
.category-card-highlight p { color: white; }

.category-cta {
  display: inline-block;
  background: white;
  color: var(--rh-red) !important;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none !important;
  margin-top: 0.75rem;
  transition: all var(--t-fast);
}

.category-cta:hover {
  background: #f8f9fa;
  text-decoration: none !important;
}

/* ── Persona Cards ───────────────────────────────────────────── */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.persona-card {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--color-text);
  display: block;
  transition: all var(--t-med);
  position: relative;
  overflow: hidden;
}

.persona-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-border);
  transition: background var(--t-med);
}

.persona-card:hover {
  border-color: var(--rh-red);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--color-text);
}

.persona-card:hover::after {
  background: linear-gradient(90deg, var(--rh-red), var(--rh-red-dark));
}

.persona-emoji {
  font-size: 2.25rem;
  margin-bottom: 1rem;
  display: block;
}

.persona-role {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--rh-red);
  margin-bottom: 0.375rem;
  font-family: 'Red Hat Text', sans-serif;
}

.persona-card h3 {
  font-size: 1rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.persona-card p {
  font-size: 0.875rem;
  color: var(--color-text-3);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.persona-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--rh-red);
}

/* ── Skill comparison (Skills vs Agents page) ────────────────── */
.vs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

.vs-card {
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  border: 1.5px solid var(--color-border);
}

.vs-card-skill {
  background: linear-gradient(135deg, #E8F2FF 0%, #F0F7FF 100%);
  border-color: rgba(0,102,204,0.2);
}

.vs-card-agent {
  background: linear-gradient(135deg, var(--rh-red-subtle) 0%, #fff0f0 100%);
  border-color: rgba(238,0,0,0.15);
}

.vs-card h3 {
  font-size: 1.25rem;
  margin-top: 0;
  margin-bottom: 0.375rem;
}

.vs-card .vs-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 1rem;
  display: block;
}

.vs-card-skill .vs-label { color: var(--color-blue); }
.vs-card-agent .vs-label { color: var(--rh-red-dark); }

.vs-card ul {
  padding-left: 1.25rem;
  margin-bottom: 0;
}

.vs-card li {
  font-size: 0.9375rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-2);
}

/* ── Steps / Phase list ──────────────────────────────────────── */
.steps {
  counter-reset: step;
  padding: 0;
  list-style: none;
  margin: 1.5rem 0;
}

.steps li {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  width: 32px;
  height: 32px;
  background: var(--color-text);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  font-family: 'Red Hat Display', sans-serif;
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.steps .step-content h4 { margin-top: 0; }
.steps .step-content p  { margin-bottom: 0; font-size: 0.9375rem; }

/* ── Details/Summary ─────────────────────────────────────────── */
details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0;
  margin: 1rem 0;
  overflow: hidden;
}

summary {
  cursor: pointer;
  font-weight: 600;
  font-family: 'Red Hat Display', sans-serif;
  color: var(--color-text);
  padding: 1rem 1.25rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--t-fast);
  user-select: none;
}

summary::after {
  content: '›';
  font-size: 1.25rem;
  color: var(--color-text-3);
  transform: rotate(90deg);
  transition: transform var(--t-fast);
}

details[open] summary::after { transform: rotate(270deg); }
summary:hover { background: var(--color-surface-2); }
details::-webkit-details-marker { display: none; }

details > *:not(summary) {
  padding: 0 1.25rem 1.25rem;
}

details[open] summary {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
}

/* ── Links Grid ──────────────────────────────────────────────── */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.link-card {
  display: block;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--t-med);
}

.link-card:hover {
  border-color: var(--rh-red);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--color-text);
}

.link-card h4 {
  font-size: 0.9375rem;
  margin: 0 0 0.375rem;
  color: var(--color-text);
}

.link-card p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-3);
  line-height: 1.45;
}

/* ── Navigation footer ───────────────────────────────────────── */
.navigation-footer {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 3rem 0 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.nav-button {
  padding: 0.625rem 1.25rem;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text-2);
  font-weight: 500;
  font-size: 0.9375rem;
  font-family: 'Red Hat Text', sans-serif;
  transition: all var(--t-fast);
}

.nav-button:hover {
  border-color: var(--rh-red);
  color: var(--rh-red);
  text-decoration: none;
  transform: translateY(-1px);
}

/* ── Inline table override ───────────────────────────────────── */
div[style*="overflow-x: auto"] table,
.table-wrap table { margin: 0; }

/* ── Utilities ───────────────────────────────────────────────── */
.text-muted  { color: var(--color-text-3); }
.text-red    { color: var(--rh-red); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .main-content {
    padding: 2.5rem 2.5rem 3rem;
  }
  .hero h1 { font-size: 2.5rem; }
}

@media (max-width: 860px) {
  .vs-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .mobile-bar { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    top: 0;
    z-index: 150;
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open { transform: translateX(0); }

  .sidebar-overlay.open { display: block; }

  .main-content {
    margin-left: 0;
    padding: 5rem 1.25rem 3rem;
  }

  .hero {
    padding: 3.5rem 1.5rem 3rem;
    border-radius: var(--radius-lg);
  }

  .hero h1 { font-size: 2rem; }
  .hero-subtitle, .hero p { font-size: 1rem; }

  .section-primary { padding: 1.5rem; }

  .persona-grid,
  .category-grid,
  .platform-grid { grid-template-columns: 1fr; }

  table { font-size: 0.875rem; }
  thead th, tbody td { padding: 0.625rem 0.75rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.625rem; }
  .btn-large { padding: 0.75rem 1.25rem; font-size: 0.9375rem; }
  .links-grid { grid-template-columns: 1fr; }
}

/* ── Print ───────────────────────────────────────────────────── */
@media print {
  .sidebar, .mobile-bar, .sidebar-overlay { display: none; }
  .main-content { margin-left: 0; padding: 0; }
  pre { background: #f5f5f5; color: #333; border: 1px solid #ccc; }
  a { color: var(--color-text); text-decoration: underline; }
}