/* ==========================================================================
   Bureau Gaming — Main Stylesheet
   A modern, clean CSS for a gaming desk SEO editorial site.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CUSTOM PROPERTIES
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-dark:        #1a1a2e;
  --color-accent:      #0f3460;
  --color-cyan:        #16c2d5;
  --color-white:       #ffffff;
  --color-body-bg:     #f5f5f7;
  --color-card-bg:     #ffffff;
  --color-text-dark:   #2d2d3a;
  --color-text-muted:  #6b6b80;
  --color-border:      #e0e0e6;
  --color-hover-bg:    #f0f7ff;
  --color-stripe:      #f9f9fb;

  /* Typography */
  --font-family:       'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base:    1rem;       /* 16px */
  --line-height-base:  1.6;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold:  700;

  /* Layout */
  --container-max:     1200px;
  --spacing-xs:        0.25rem;
  --spacing-sm:        0.5rem;
  --spacing-md:        1rem;
  --spacing-lg:        1.5rem;
  --spacing-xl:        2rem;
  --spacing-2xl:       3rem;
  --spacing-3xl:       4rem;

  /* Misc */
  --radius-sm:         6px;
  --radius-md:         10px;
  --radius-lg:         16px;
  --shadow-sm:         0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md:         0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg:         0 8px 24px rgba(0, 0, 0, 0.12);
  --transition-fast:   0.2s ease;
  --transition-base:   0.3s ease;
}

/* --------------------------------------------------------------------------
   2. RESET & BASE
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-dark);
  background-color: var(--color-body-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--transition-fast), text-decoration var(--transition-fast);
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. UTILITY CLASSES
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--spacing-md);
}

.text-center {
  text-align: center;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   4. TYPOGRAPHY
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  color: var(--color-dark);
  font-weight: var(--font-weight-bold);
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  margin-bottom: var(--spacing-sm);
}

h4 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
}

/* --------------------------------------------------------------------------
   5. SITE HEADER & NAVIGATION
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-dark);
  box-shadow: var(--shadow-md);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.85;
  text-decoration: none;
}

.site-logo .logo-icon {
  font-size: 1.5rem;
}

.site-logo .logo-highlight {
  color: var(--color-cyan);
}

/* Hamburger toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Animate hamburger to X when open */
.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Nav list — mobile first (hidden by default) */
.nav-list {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background-color: var(--color-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-lg);
}

.nav-list.is-open {
  display: flex;
}

.nav-list li a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.95rem;
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-list li a:hover,
.nav-list li a:focus-visible {
  background-color: rgba(255, 255, 255, 0.06);
  color: var(--color-cyan);
  text-decoration: none;
}

.nav-list li a[aria-current="page"] {
  color: var(--color-cyan);
}

/* Desktop nav (768px+) */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-list,
  .nav-list.is-open {
    display: flex;
    flex-direction: row;
    position: static;
    background: none;
    border: none;
    padding: 0;
    box-shadow: none;
    gap: var(--spacing-xs);
  }

  .nav-list li a {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
  }
}

/* --------------------------------------------------------------------------
   6. BREADCRUMB
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--color-border);
  margin-right: var(--spacing-xs);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--color-text-dark);
  font-weight: var(--font-weight-medium);
}

/* --------------------------------------------------------------------------
   7. SITE MAIN
   -------------------------------------------------------------------------- */
.site-main {
  padding: var(--spacing-xl) 0 var(--spacing-3xl);
  min-height: 60vh;
}

/* --------------------------------------------------------------------------
   8. PAGE HERO
   -------------------------------------------------------------------------- */
.page-hero {
  text-align: center;
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--spacing-md);
}

.page-hero .hero-intro {
  max-width: 720px;
  margin-inline: auto;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Hero variants */
.page-type--home .page-hero {
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-accent) 100%);
  color: var(--color-white);
  border-bottom: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  margin-bottom: var(--spacing-2xl);
}

.page-type--home .page-hero h1 {
  color: var(--color-white);
}

.page-type--home .page-hero .hero-intro {
  color: rgba(255, 255, 255, 0.8);
}

.page-type--hub .page-hero {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   9. TABLE OF CONTENTS
   -------------------------------------------------------------------------- */
.toc {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-cyan);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.toc-title {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-dark);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.toc ol {
  list-style: decimal;
  padding-left: var(--spacing-lg);
}

.toc ol li {
  margin-bottom: var(--spacing-sm);
  font-size: 0.925rem;
}

.toc ol li a {
  color: var(--color-accent);
}

.toc ol li a:hover {
  color: var(--color-cyan);
}

/* --------------------------------------------------------------------------
   10. CONTENT SECTIONS
   -------------------------------------------------------------------------- */
.content-section {
  margin-bottom: var(--spacing-2xl);
}

.content-section h2 {
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-cyan);
  margin-bottom: var(--spacing-lg);
}

.content-section h3 {
  margin-top: var(--spacing-lg);
}

.content-section ul,
.content-section ol {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.content-section ul {
  list-style: disc;
}

.content-section ol {
  list-style: decimal;
}

.content-section li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.7;
}

.content-section li::marker {
  color: var(--color-cyan);
}

.content-section strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-dark);
}

/* --------------------------------------------------------------------------
   11. HUB CARDS (Grid)
   -------------------------------------------------------------------------- */
.hub-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

@media (min-width: 600px) {
  .hub-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .hub-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --------------------------------------------------------------------------
   12. HUB CARD
   -------------------------------------------------------------------------- */
.hub-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.hub-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-cyan);
  text-decoration: none;
}

.hub-card .card-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.hub-card .card-title {
  font-size: 1.15rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-dark);
}

.hub-card .card-description {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

.hub-card .card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-cyan);
  margin-top: var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   13. COMPARISON TABLE
   -------------------------------------------------------------------------- */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: var(--spacing-xl);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.925rem;
  min-width: 600px;
}

.comparison-table thead {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.comparison-table th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
}

.comparison-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.comparison-table tbody tr:nth-child(even) {
  background-color: var(--color-stripe);
}

.comparison-table tbody tr:hover {
  background-color: var(--color-hover-bg);
}

.comparison-table tbody tr:last-child td {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   14–15. FAQ SECTION
   -------------------------------------------------------------------------- */
.faq-section {
  margin-bottom: var(--spacing-2xl);
}

.faq-section > h2 {
  margin-bottom: var(--spacing-lg);
}

.faq-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--color-cyan);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  transition: background-color var(--transition-fast);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-cyan);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--spacing-md);
}

.faq-item[open] summary::after {
  content: "\2212"; /* minus sign */
}

.faq-item summary:hover {
  background-color: var(--color-hover-bg);
}

.faq-item .faq-answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item .faq-answer p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   16–17. RELATED LINKS
   -------------------------------------------------------------------------- */
.related-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

@media (min-width: 600px) {
  .related-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .related-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-link {
  display: block;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  color: inherit;
  text-decoration: none;
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.related-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-cyan);
  text-decoration: none;
}

.related-link .related-title {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-dark);
  margin-bottom: var(--spacing-xs);
}

.related-link .related-description {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   18–20. SITE FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding-top: var(--spacing-3xl);
  margin-top: var(--spacing-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 600px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-col ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--color-cyan);
  text-decoration: none;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}

.footer-bottom {
  text-align: center;
  padding: var(--spacing-lg) 0;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
}

/* --------------------------------------------------------------------------
   21. PAGE TYPE VARIANTS
   -------------------------------------------------------------------------- */

/* Home page */
.page-type--home .site-main {
  padding-top: 0;
}

/* Hub page */
.page-type--hub .content-section h2 {
  border-bottom-color: var(--color-accent);
}

/* Article page */
.page-type--article .site-main {
  max-width: 800px;
  margin-inline: auto;
}

.page-type--article .page-hero {
  text-align: left;
}

.page-type--article .page-hero .hero-intro {
  margin-inline: 0;
}

/* Guide page */
.page-type--guide .toc {
  position: sticky;
  top: 80px;
}

.page-type--guide .content-section h2::before {
  content: "";
  display: block;
  height: 80px;
  margin-top: -80px;
  visibility: hidden;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   22. IMAGES & MEDIA IN CONTENT
   -------------------------------------------------------------------------- */
.content-section img {
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-sm);
}

.content-section figure {
  margin: var(--spacing-xl) 0;
}

.content-section figcaption {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
}

/* --------------------------------------------------------------------------
   23. BLOCKQUOTES & CALLOUTS
   -------------------------------------------------------------------------- */
.content-section blockquote {
  border-left: 4px solid var(--color-cyan);
  background-color: var(--color-card-bg);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

.content-section blockquote p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   24. BUTTONS (optional utility)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.65rem 1.5rem;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
}

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

.btn-primary {
  background-color: var(--color-cyan);
  color: var(--color-dark);
}

.btn-primary:hover {
  background-color: #13aebf;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-cyan);
  border: 2px solid var(--color-cyan);
}

.btn-outline:hover {
  background-color: var(--color-cyan);
  color: var(--color-dark);
}

/* --------------------------------------------------------------------------
   25. SELECTION & FOCUS
   -------------------------------------------------------------------------- */
::selection {
  background-color: rgba(22, 194, 213, 0.25);
  color: var(--color-dark);
}

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   26. SCROLL-BAR (subtle custom scrollbar for webkit)
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-body-bg);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   27. RESPONSIVE FINE-TUNING
   -------------------------------------------------------------------------- */

/* Small screens */
@media (max-width: 599px) {
  .page-hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
  }

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

  .toc {
    padding: var(--spacing-md);
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .site-footer {
    padding-top: var(--spacing-2xl);
  }
}

/* Medium screens */
@media (min-width: 600px) and (max-width: 959px) {
  .page-hero h1 {
    font-size: 2rem;
  }
}

/* Large screens — guide layout with sidebar toc */
@media (min-width: 960px) {
  .page-type--guide .site-main > .container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
  }

  .page-type--guide .toc {
    order: -1;
  }
}

/* --------------------------------------------------------------------------
   28. PRINT STYLES
   -------------------------------------------------------------------------- */
@media print {
  .site-header,
  .site-footer,
  .nav-toggle,
  .toc {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

  .site-main {
    padding: 0;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .hub-card,
  .related-link {
    border: 1px solid #ccc;
    box-shadow: none;
  }
}