/* NFL Stadium Wallet — Red Hat Design System Inspired */
:root {
  --rh-red: #cc0000;
  --rh-red-dark: #a30000;
  --rh-red-light: #f2d2d2;
  --rh-black: #151515;
  --rh-gray-900: #1f1f1f;
  --rh-gray-700: #3c3f42;
  --rh-gray-500: #6a6e73;
  --rh-gray-300: #d2d2d2;
  --rh-gray-100: #f0f0f0;
  --rh-white: #ffffff;
  --rh-blue: #0066cc;
  --rh-teal: #009596;
  --rh-gold: #f0ab00;
  --rh-green: #3e8635;
  --rh-purple: #6753ac;
  --rh-text: var(--rh-black);
  --rh-text-muted: var(--rh-gray-500);
  --rh-bg: var(--rh-white);
  --rh-border: var(--rh-gray-300);
  --rh-code-bg: var(--rh-gray-100);
  --rh-radius: 4px;
  --rh-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
  --rh-shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
  --rh-max-width: 1200px;
  --rh-content-width: 960px;
  --rh-transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Red Hat Text", "Overpass", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--rh-text);
  background: var(--rh-bg);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* Red band at top */
.rh-band {
  height: 4px;
  background: var(--rh-red);
  position: sticky;
  top: 0;
  z-index: 1001;
}

/* Header */
.site-header {
  background: var(--rh-white);
  border-bottom: 1px solid var(--rh-border);
  position: sticky;
  top: 4px;
  z-index: 1000;
  box-shadow: var(--rh-shadow);
}
.header-inner {
  max-width: var(--rh-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  height: 64px;
  gap: 1rem;
}
.site-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--rh-text);
  flex-shrink: 0;
}
.rh-logo { height: 28px; width: auto; }
.site-title {
  font-family: "Red Hat Display", "Red Hat Text", sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--rh-text);
  white-space: nowrap;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-left: auto;
}
.site-nav {
  display: flex;
  gap: 0;
}
.site-nav a {
  padding: 0 0.75rem;
  height: 64px;
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--rh-gray-700);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color var(--rh-transition), border-color var(--rh-transition);
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--rh-red);
  border-bottom-color: var(--rh-red);
}
.lang-switch {
  display: flex;
  gap: 0.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--rh-border);
  border-radius: 100px;
  padding: 2px;
}
.lang-switch a, .lang-switch .lang-active {
  padding: 0.2rem 0.5rem;
  border-radius: 100px;
  text-decoration: none;
  transition: all var(--rh-transition);
}
.lang-switch a { color: var(--rh-gray-500); }
.lang-switch a:hover { color: var(--rh-red); background: var(--rh-red-light); }
.lang-active { background: var(--rh-red); color: var(--rh-white) !important; }
.gh-link {
  color: var(--rh-gray-700);
  transition: color var(--rh-transition);
  display: flex;
}
.gh-link:hover { color: var(--rh-red); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--rh-gray-700);
  transition: transform var(--rh-transition);
}

/* Main */
.page-main {
  max-width: var(--rh-content-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* Hero */
.hero-section {
  text-align: left;
  padding: 3rem 0 3.5rem;
  border-bottom: 1px solid var(--rh-border);
  margin-bottom: 3rem;
}
.hero-section h1 {
  font-family: "Red Hat Display", sans-serif;
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--rh-text);
  margin: 0 0 0.75rem;
  line-height: 1.15;
  border: none;
}
.hero-section h1 span { color: var(--rh-red); }
.hero-section .hero-sub {
  font-size: 1.15rem;
  color: var(--rh-gray-500);
  max-width: 640px;
  margin: 0 0 1.5rem;
  line-height: 1.6;
}
.hero-section .hero-authors {
  font-size: 0.85rem;
  color: var(--rh-gray-500);
  line-height: 1.8;
}
.hero-section .hero-authors strong { color: var(--rh-text); }

/* Section headings */
.page-content h1 {
  font-family: "Red Hat Display", sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--rh-text);
  margin: 3rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--rh-red);
  line-height: 1.2;
}
.page-content h2 {
  font-family: "Red Hat Display", sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--rh-text);
  margin: 2.5rem 0 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--rh-gray-300);
}
.page-content h3 {
  font-family: "Red Hat Display", sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
  color: var(--rh-gray-700);
}
.page-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.25rem 0 0.4rem;
  color: var(--rh-gray-700);
}

/* Links */
.page-content a { color: var(--rh-blue); text-decoration: none; font-weight: 500; }
.page-content a:hover { color: var(--rh-red); text-decoration: underline; }

/* Paragraphs */
.page-content p { margin: 0.75rem 0; }

/* Lists */
.page-content ul, .page-content ol { padding-left: 1.5rem; margin: 0.75rem 0; }
.page-content li { margin: 0.35rem 0; }

/* Code */
pre, code {
  font-family: "Red Hat Mono", "Consolas", "Monaco", "Courier New", monospace;
}
code {
  background: var(--rh-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.875em;
  color: var(--rh-gray-900);
}
pre {
  background: var(--rh-gray-900);
  color: #e6e6e6;
  padding: 1rem 1.25rem;
  border-radius: var(--rh-radius);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 1rem 0;
  border-left: 4px solid var(--rh-red);
}
pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Blockquote / callouts */
blockquote {
  border-left: 4px solid var(--rh-red);
  margin: 1.25rem 0;
  padding: 1rem 1.25rem;
  background: #fff5f5;
  color: var(--rh-gray-700);
  border-radius: 0 var(--rh-radius) var(--rh-radius) 0;
}
blockquote p { margin: 0.25rem 0; }

/* Tables */
table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.9rem;
  box-shadow: var(--rh-shadow);
  border-radius: var(--rh-radius);
  overflow: hidden;
}
th, td {
  border: 1px solid var(--rh-gray-300);
  padding: 0.6rem 0.85rem;
  text-align: left;
}
th {
  background: var(--rh-gray-100);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--rh-gray-700);
}
tr:nth-child(even) { background: #fafafa; }
tr:hover { background: #f5f5f5; }

/* Cards grid for sections */
.section-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.section-card {
  background: var(--rh-white);
  border: 1px solid var(--rh-border);
  border-radius: var(--rh-radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--rh-shadow);
  transition: box-shadow var(--rh-transition), border-color var(--rh-transition);
}
.section-card:hover {
  box-shadow: var(--rh-shadow-lg);
  border-color: var(--rh-red);
}
.section-card h4 {
  margin: 0 0 0.5rem;
  font-family: "Red Hat Display", sans-serif;
  font-weight: 600;
  font-size: 1rem;
  color: var(--rh-text);
}
.section-card p { font-size: 0.9rem; color: var(--rh-gray-500); margin: 0; }
.section-card .card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  display: block;
}

/* Mermaid/ASCII diagrams */
.diagram-box {
  background: var(--rh-gray-100);
  border: 1px solid var(--rh-border);
  border-radius: var(--rh-radius);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1rem 0;
  font-family: "Red Hat Mono", monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  white-space: pre;
}

/* Image styling */
.doc-img-link {
  display: block;
  margin: 1.25rem auto;
  max-width: 100%;
  text-align: center;
}
.doc-img-link img,
.doc-img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--rh-border);
  border-radius: var(--rh-radius);
  box-shadow: var(--rh-shadow);
  cursor: pointer;
  transition: box-shadow var(--rh-transition);
}
.doc-img-link:hover img,
.doc-img:hover { box-shadow: var(--rh-shadow-lg); }
.img-caption {
  display: block;
  text-align: center;
  font-size: 0.85rem;
  color: var(--rh-gray-500);
  margin-top: 0.5rem;
  font-style: italic;
}

/* Screenshot placeholder */
.screenshot-placeholder {
  background: linear-gradient(135deg, var(--rh-gray-100) 0%, #e8e8e8 100%);
  border: 2px dashed var(--rh-gray-300);
  border-radius: var(--rh-radius);
  padding: 2rem;
  text-align: center;
  color: var(--rh-gray-500);
  margin: 1rem 0;
  font-size: 0.9rem;
}
.screenshot-placeholder strong { color: var(--rh-gray-700); display: block; margin-bottom: 0.5rem; }

/* Tag/badge */
.rh-tag {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.rh-tag--red { background: var(--rh-red-light); color: var(--rh-red-dark); }
.rh-tag--green { background: #e9f5e6; color: var(--rh-green); }
.rh-tag--blue { background: #e6f0fa; color: var(--rh-blue); }
.rh-tag--gold { background: #fef3cd; color: #7a5900; }
.rh-tag--purple { background: #ede7f6; color: var(--rh-purple); }
.rh-tag--teal { background: #e0f7f7; color: #005f60; }

/* Test plan checkbox styles */
.test-plan-table td:last-child { text-align: center; font-size: 1.2rem; }
.status-pending { color: var(--rh-gray-300); }
.status-pass { color: var(--rh-green); }

/* TOC */
.toc {
  background: var(--rh-gray-100);
  border: 1px solid var(--rh-border);
  border-radius: var(--rh-radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem;
}
.toc h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--rh-gray-700);
}
.toc ol { padding-left: 1.25rem; margin: 0; }
.toc li { margin: 0.3rem 0; }
.toc a {
  color: var(--rh-blue) !important;
  font-size: 0.9rem;
  font-weight: 500;
}
.toc a:hover { color: var(--rh-red) !important; }

/* Footer */
.site-footer {
  background: var(--rh-gray-900);
  color: var(--rh-gray-300);
  padding: 2.5rem 0;
  margin-top: 4rem;
}
.footer-inner {
  max-width: var(--rh-max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  text-align: center;
}
.rh-logo-footer { height: 24px; width: auto; margin-bottom: 0.75rem; }
.footer-inner p { margin: 0.25rem 0; font-size: 0.85rem; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  margin: 1rem 0;
}
.footer-links a {
  color: var(--rh-gray-300);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--rh-transition);
}
.footer-links a:hover { color: var(--rh-white); }
.footer-legal {
  font-size: 0.8rem;
  color: var(--rh-gray-500);
  margin-top: 1.25rem !important;
  border-top: 1px solid var(--rh-gray-700);
  padding-top: 1.25rem;
}

/* Print / export styles */
@media print {
  .rh-band, .site-header, .site-footer, .nav-toggle, .lang-switch, .gh-link { display: none !important; }
  body { font-size: 11pt; line-height: 1.5; color: #000; }
  .page-main { max-width: 100%; padding: 0; }
  pre { border: 1px solid #ccc; background: #f9f9f9; color: #000; }
  table { box-shadow: none; }
  .section-cards { display: block; }
  .section-card {
    box-shadow: none;
    break-inside: avoid;
    display: block;
    border: 1px solid #ccc;
    margin-bottom: 0.75rem;
    padding: 0.75rem 1rem;
  }
  .section-card:hover { box-shadow: none; border-color: #ccc; }
  .section-card .card-icon { display: inline; margin-right: 0.5rem; }
  h1, h2, h3 { break-after: avoid; }
  .screenshot-placeholder { border: 1px solid #999; }
  a { color: #000 !important; text-decoration: underline; }
  a::after { content: " (" attr(href) ")"; font-size: 0.8em; color: #666; }
  .page-content a::after { content: ""; }
}

/* Responsive */
@media (max-width: 768px) {
  .site-nav { 
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--rh-white);
    border-bottom: 1px solid var(--rh-border);
    flex-direction: column;
    box-shadow: var(--rh-shadow-lg);
    padding: 0.5rem 0;
    z-index: 999;
  }
  .site-nav.open { display: flex; }
  .site-nav a {
    height: auto;
    padding: 0.75rem 1.5rem;
    border-bottom: none;
    border-left: 3px solid transparent;
  }
  .site-nav a:hover, .site-nav a.active { border-left-color: var(--rh-red); }
  .nav-toggle { display: flex; }
  .hero-section h1 { font-size: 1.75rem; }
  .hero-section { padding: 2rem 0; }
  .section-cards { grid-template-columns: 1fr; }
  .header-inner { padding: 0 1rem; }
  .page-main { padding: 1.5rem 1rem 3rem; }
}