/* ==========================================================================
   Varen — docs.varen.au documentation site
   Layer 1: base copied from varen.au main.css
   Layer 2: docs-specific additions
   ========================================================================== */

/* ── Layer 1: Base from varen.au ─────────────────────────────────────────── */

:root {
  --bg-deep:        #060a2e;
  --bg-nav:         #090f52;
  --bg-surface:     #0d1565;
  --bg-elevated:    #13277f;
  --accent-sky:     #19abee;
  --accent-royal:   #1c589c;
  --accent-warm:    #f59e0b;
  --accent-warm-bg: rgba(245, 158, 11, 0.12);
  --text-primary:   #e0e8f8;
  --text-secondary: #7b8ec8;
  --text-muted:     rgba(123, 142, 200, 0.45);
  --border:         rgba(255, 255, 255, 0.08);
  --radius:         12px;
  --radius-lg:      20px;

  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, Helvetica, Arial, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent-sky);
  text-decoration: none;
  transition: color 180ms ease;
}

a:hover {
  color: var(--accent-warm);
}

img, svg {
  display: block;
  max-width: 100%;
}

::selection {
  background: var(--accent-warm);
  color: var(--bg-deep);
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-label {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-warm);
  font-weight: 600;
  margin-bottom: 1.25rem;
}

h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.15;
}

h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1rem;
}

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

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 720ms ease, transform 720ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-child {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.visible .reveal-child {
  opacity: 1;
  transform: translateY(0);
}

.reveal.visible .reveal-child:nth-child(1) { transition-delay: 0ms; }
.reveal.visible .reveal-child:nth-child(2) { transition-delay: 80ms; }
.reveal.visible .reveal-child:nth-child(3) { transition-delay: 160ms; }
.reveal.visible .reveal-child:nth-child(4) { transition-delay: 240ms; }
.reveal.visible .reveal-child:nth-child(5) { transition-delay: 320ms; }
.reveal.visible .reveal-child:nth-child(6) { transition-delay: 400ms; }
.reveal.visible .reveal-child:nth-child(7) { transition-delay: 480ms; }
.reveal.visible .reveal-child:nth-child(8) { transition-delay: 560ms; }

nav.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  background: transparent;
  transition: background 280ms ease, backdrop-filter 280ms ease, padding 280ms ease, border-color 280ms ease;
  border-bottom: 1px solid transparent;
}

nav.site-nav.scrolled {
  background: rgba(9, 9, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.85rem 0;
  border-bottom-color: var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.wordmark {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.32em;
  color: var(--text-primary);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
}

.wordmark .v-accent {
  color: var(--accent-warm);
  margin-right: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 180ms ease;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  background: var(--accent-warm);
  color: var(--bg-deep);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 999px;
  transition: transform 200ms ease, box-shadow 200ms ease, background 200ms ease;
  box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4);
  animation: pulse-glow 2.6s ease-in-out infinite;
}

.nav-cta:hover {
  color: var(--bg-deep);
  background: #ffb02e;
  transform: translateY(-1px);
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.35); }
  50% { box-shadow: 0 0 0 12px rgba(245, 158, 11, 0); }
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: transform 220ms ease, opacity 220ms ease;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.95rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 200ms ease, background 200ms ease, color 200ms ease, box-shadow 200ms ease;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--accent-warm);
  color: var(--bg-deep);
  box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.35);
  animation: pulse-glow 2.6s ease-in-out infinite;
}

.btn-primary:hover {
  color: var(--bg-deep);
  background: #ffb02e;
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  border-color: var(--accent-sky);
  color: var(--accent-sky);
  transform: translateY(-2px);
}

footer.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 3rem 0 2.5rem;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}

.footer-left {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-warm);
}

.footer-fine {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
  max-width: 720px;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(6, 10, 46, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 5.5rem 2rem 2.5rem;
    gap: 1.5rem;
    transform: translateY(-100%);
    transition: transform 320ms ease;
    height: auto;
    border-bottom: 1px solid var(--border);
  }

  nav.site-nav.nav-open .nav-links {
    transform: translateY(0);
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    font-size: 1.05rem;
  }

  .nav-cta {
    width: 100%;
    justify-content: center;
    padding: 0.85rem 1.25rem;
  }

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ── Layer 2: Docs-specific additions ────────────────────────────────────── */

/* ── Docs layout shell ───────────────────────────────────────────────────── */

body {
  padding-top: 0;
}

.docs-shell {
  display: flex;
  min-height: calc(100vh - 68px);
  padding-top: 68px;
}

/* ── Sidebar ─────────────────────────────────────────────────────────────── */

.docs-sidebar {
  width: 272px;
  flex-shrink: 0;
  position: sticky;
  top: 68px;
  height: calc(100vh - 68px);
  overflow-y: auto;
  padding: 2rem 0 4rem;
  border-right: 1px solid var(--border);
  background: var(--bg-deep);
  scrollbar-width: thin;
  scrollbar-color: var(--bg-elevated) transparent;
}

.docs-sidebar-inner {
  padding: 0 1.5rem;
}

.docs-nav-group {
  margin-bottom: 1.75rem;
}

.docs-nav-group-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  display: block;
}

.docs-nav-link {
  display: block;
  padding: 0.45rem 0.75rem;
  border-radius: 8px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 160ms, background 160ms;
  line-height: 1.4;
}

.docs-nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-nav);
}

.docs-nav-link.active {
  color: var(--accent-warm);
  background: var(--accent-warm-bg);
  font-weight: 600;
}

.docs-nav-sub {
  margin-top: 0.25rem;
  margin-left: 0.75rem;
  display: none;
}

.docs-nav-link.active ~ .docs-nav-sub,
.docs-nav-link.active + .docs-nav-sub {
  display: block;
}

.docs-nav-sub-link {
  display: block;
  padding: 0.3rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color 160ms;
}

.docs-nav-sub-link:hover {
  color: var(--accent-sky);
}

/* ── Main content area ───────────────────────────────────────────────────── */

.docs-main {
  flex: 1;
  min-width: 0;
  padding: 3rem 3.5rem 6rem;
  max-width: 860px;
}

.docs-breadcrumb {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.docs-breadcrumb a:hover {
  color: var(--accent-sky);
}

.docs-breadcrumb span {
  color: var(--text-secondary);
}

.docs-content h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  margin-bottom: 0.75rem;
  line-height: 1.15;
}

.docs-content .page-intro {
  font-size: 1.1rem;
  color: var(--text-primary);
  opacity: 0.85;
  max-width: 680px;
  margin-bottom: 3rem;
  line-height: 1.65;
}

.docs-content h2 {
  font-size: 1.4rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.docs-content h2:first-of-type {
  margin-top: 2rem;
  padding-top: 0;
  border-top: none;
}

.docs-content h3 {
  font-size: 1.1rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.docs-content p {
  max-width: 680px;
  line-height: 1.7;
}

.docs-content ul,
.docs-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  max-width: 680px;
}

.docs-content li {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.65;
  margin-bottom: 0.4rem;
}

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

.docs-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 0.87em;
  background: var(--bg-elevated);
  color: var(--accent-sky);
  padding: 0.15em 0.45em;
  border-radius: 5px;
  border: 1px solid var(--border);
}

.docs-content pre {
  background: var(--bg-nav);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.25rem 0;
  max-width: 100%;
  position: relative;
}

.docs-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.88rem;
  color: var(--accent-sky);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}

.docs-content blockquote {
  border-left: 3px solid var(--accent-warm);
  margin: 1.5rem 0;
  padding: 0.75rem 1.5rem;
  background: var(--accent-warm-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
  max-width: 680px;
}

.docs-content blockquote p {
  color: var(--text-primary);
  margin: 0;
  font-style: italic;
}

/* Callout boxes */
.callout {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  max-width: 680px;
}

.callout.callout-tip {
  border-left: 3px solid var(--accent-sky);
}

.callout.callout-warn {
  border-left: 3px solid var(--accent-warm);
}

.callout-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-warm);
  margin-bottom: 0.5rem;
}

.callout.callout-tip .callout-label {
  color: var(--accent-sky);
}

.callout p {
  margin: 0;
  color: var(--text-primary);
}

/* Platform tabs (for installation page) */
.platform-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.platform-tab {
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 160ms, border-color 160ms;
  margin-bottom: -1px;
}

.platform-tab:hover {
  color: var(--text-primary);
}

.platform-tab.active {
  color: var(--accent-warm);
  border-bottom-color: var(--accent-warm);
}

.platform-panel {
  display: none;
  padding-top: 2rem;
}

.platform-panel.active {
  display: block;
}

/* Definition table */
.def-table {
  width: 100%;
  max-width: 680px;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}

.def-table th {
  text-align: left;
  padding: 0.6rem 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.def-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
  line-height: 1.5;
}

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

.def-table td:first-child {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
}

.def-table tr:hover td {
  background: var(--bg-nav);
}

/* Prev/Next navigation */
.docs-footer-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
}

.docs-footer-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 48%;
}

.docs-footer-nav a:last-child {
  text-align: right;
  margin-left: auto;
}

.docs-footer-nav-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--text-muted);
}

.docs-footer-nav-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 160ms;
}

.docs-footer-nav a:hover .docs-footer-nav-title {
  color: var(--accent-warm);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

.docs-sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
}

@media (max-width: 960px) {
  .docs-sidebar {
    position: fixed;
    z-index: 90;
    top: 68px;
    left: 0;
    transform: translateX(-100%);
    transition: transform 300ms ease;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.4);
  }

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

  .docs-sidebar-toggle {
    display: block;
  }

  .docs-main {
    padding: 2rem 1.5rem 4rem;
  }
}