/* ==========================================================================
   nav.css — header-only styles for the shared cross-site nav (nav.js).

   This is a SCOPED subset of site.css: only the design tokens + header / menu
   / language-dropdown rules. It deliberately omits site.css's base element
   rules (body, p, a, h*, input, button, section…) so dropping the shared nav
   onto a sibling site does NOT restyle that site's own content.

   Keep header-related rules here in sync with site.css. See nav.js.
   ========================================================================== */

/* ---- Design tokens (from site.css :root). Scoped to the header (all nav
   elements are descendants) so we never clobber a host site's own CSS vars. ---- */
header.site-header {
  --bg: #000000;
  --ink: #8b0000;
  --muted: #8b0000;
  --accent: #a00000;
  --gold: #8b0000;
  --border: #3a0000;
  --shadow: rgba(0, 0, 0, .40);
  --glow-color: 160, 0, 0;
  --glow-strong:
    0 0 0 1px rgba(var(--glow-color), .55),
    0 0 6px rgba(var(--glow-color), .65),
    0 0 18px rgba(var(--glow-color), .55),
    0 0 48px rgba(var(--glow-color), .35),
    inset 0 0 12px rgba(var(--glow-color), .18);
  --r: 6px;
  --wrap: 960px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.35rem;
  --space-2xl: 1.75rem;
  --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.85rem);
  --fs-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.9rem);
  --fs-lg: clamp(0.95rem, 0.9rem + 0.25vw, 1.05rem);
  --fs-xl: clamp(1.05rem, 1rem + 0.25vw, 1.15rem);
}

/* Header should always look like www (Inter), not inherit the host body font. */
header.site-header {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
}

.header-button:hover,
.header-button:focus-visible,
#menu-toggle:hover,
#menu-toggle:focus-visible {
  text-shadow: none;
}

/* ---- Header ---- */
header.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

/* Offset the host page so the fixed header doesn't overlap its content. */
body:has(header.site-header) {
  padding-top: var(--site-header-height, 76px);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-width: 240px;
}

.logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r);
}

.logo img {
  height: 48px;
  width: 48px;
  object-fit: contain;
  border: 2px solid var(--border);
  border-radius: var(--r);
  transition: border-color .25s ease, box-shadow .35s ease, transform .35s ease;
}

header.site-header .logo:hover img,
header.site-header .logo:focus-visible img {
  border-color: rgba(var(--glow-color), .9);
  box-shadow: var(--glow-strong);
  animation: logo-pulse 2.4s ease-in-out infinite;
}

@keyframes logo-pulse {
  0%, 100% {
    box-shadow:
      0 0 0 1px rgba(var(--glow-color), .55),
      0 0 6px rgba(var(--glow-color), .65),
      0 0 18px rgba(var(--glow-color), .55),
      0 0 48px rgba(var(--glow-color), .35),
      inset 0 0 12px rgba(var(--glow-color), .18);
  }
  50% {
    box-shadow:
      0 0 0 1px rgba(var(--glow-color), .8),
      0 0 10px rgba(var(--glow-color), .9),
      0 0 28px rgba(var(--glow-color), .75),
      0 0 64px rgba(var(--glow-color), .5),
      inset 0 0 18px rgba(var(--glow-color), .28);
  }
}

@media (prefers-reduced-motion: reduce) {
  header.site-header .logo:hover img,
  header.site-header .logo:focus-visible img {
    animation: none;
  }
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: var(--fs-lg);
  color: var(--gold);
  letter-spacing: .2px;
}

.brand-text span {
  font-size: var(--fs-sm);
  color: var(--muted);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-button {
  font-size: var(--fs-sm);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: var(--r);
  color: var(--gold);
  text-decoration: none;
  background: var(--bg);
  cursor: pointer;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background .15s, color .15s, border-color .15s, box-shadow .25s;
}

.header-button:hover {
  background: var(--accent);
  color: var(--ink);
  border-color: rgba(var(--glow-color), .9);
  box-shadow:
    0 0 0 1px rgba(var(--glow-color), .4),
    0 0 12px rgba(var(--glow-color), .55),
    0 0 28px -4px rgba(var(--glow-color), .4);
}

nav.site-nav[hidden],
.lang-menu[hidden] {
  display: none !important;
}

.header-icon-button {
  width: 36px;
  min-width: 36px;
  height: 36px;
  padding: 0;
  font-size: 1.05rem;
  line-height: 1;
}

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

.protocol-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
}

.protocol-pill {
  --protocol-accent: var(--accent);
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 5px 10px;
  border: 1px solid var(--protocol-accent);
  border-radius: 999px;
  background: rgba(var(--glow-color), .06);
  color: var(--protocol-accent);
  font-family: "JetBrains Mono", "IBM Plex Mono", "Fira Code", "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0;
  box-shadow: inset 0 0 10px rgba(var(--glow-color), .08);
}

.protocol-pill:hover,
.protocol-pill:focus-visible {
  background: var(--protocol-accent);
  color: #050000;
  text-shadow: none;
  box-shadow:
    0 0 0 1px var(--protocol-accent),
    0 0 16px color-mix(in srgb, var(--protocol-accent) 65%, transparent);
}

.protocol-pill--gemini { --protocol-accent: #2fd7b5; }
.protocol-pill--gopher { --protocol-accent: #d8a735; }
.protocol-pill--tor { --protocol-accent: #a579d6; }
.protocol-pill--i2p { --protocol-accent: #ff7b2c; }

/* ---- Menu ---- */
.menu-wrapper {
  position: relative;
}

#menu-toggle {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  line-height: 1;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--bg);
  color: var(--ink);
  padding: 0;
  transition: transform .25s ease, background .15s, color .15s, border-color .15s, box-shadow .25s;
}

#menu-toggle:hover {
  background: var(--accent);
  color: var(--ink);
  border-color: rgba(var(--glow-color), .9);
  box-shadow:
    0 0 0 1px rgba(var(--glow-color), .4),
    0 0 14px rgba(var(--glow-color), .6),
    0 0 32px -4px rgba(var(--glow-color), .4);
}

#menu-toggle.active {
  transform: rotate(90deg);
  background: var(--bg);
  color: var(--ink);
  border-color: var(--border);
}

#menu-toggle.active:hover {
  background: var(--accent);
  color: var(--ink);
  border-color: var(--accent);
}

nav.site-nav {
  position: absolute;
  right: 0;
  top: calc(100% + var(--space-xs));
  background: var(--bg);
  border: 1px solid var(--ink);
  border-radius: var(--r);
  padding: var(--space-md) var(--space-md);
  min-width: 200px;
  box-shadow: 0 10px 22px var(--shadow);
  z-index: 1200;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

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

nav.site-nav li {
  margin: var(--space-sm) 0;
}

nav.site-nav a {
  display: block;
  padding: var(--space-xs) var(--space-xs);
  transition: background .15s, color .15s;
  color: var(--gold);
  font-size: var(--fs-xl);
  margin: 0;
  text-decoration: none;
}

nav.site-nav a:hover {
  background: var(--accent);
  color: var(--ink);
}

nav.site-nav .nav-section {
  margin-bottom: var(--space-sm);
}

nav.site-nav .nav-section:last-child {
  margin-bottom: 0;
}

nav.site-nav .nav-section+.nav-section {
  border-top: 1px solid var(--border);
  padding-top: var(--space-sm);
}

nav.site-nav .nav-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-xs);
  padding: var(--space-xs);
}

/* ---- Language dropdown ---- */
.lang {
  position: relative;
}

.lang-toggle-wrapper {
  display: inline-block;
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + var(--space-xs));
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: 0 10px 22px var(--shadow);
  min-width: 160px;
  padding: var(--space-sm);
  z-index: 1200;
}

.lang-menu a {
  display: block;
  padding: var(--space-sm) var(--space-sm);
  color: var(--gold);
  text-decoration: none;
  transition: background .15s;
}

.lang-menu a:hover {
  background: var(--accent);
  color: var(--ink);
}

/* ---- Light-mode header (driven by body.light-mode from site.js) ---- */
body.light-mode header.site-header {
  --bg: #fff8f1;
  --ink: #2a1212;
  --muted: #7a4545;
  --accent: #8b0000;
  --gold: #8b0000;
  --border: #e8c8c8;
  --shadow: rgba(139, 0, 0, .12);
  --glow-color: 139, 0, 0;
  background: rgba(255, 248, 241, .96);
}

body.light-mode .header-button,
body.light-mode #menu-toggle,
body.light-mode nav.site-nav,
body.light-mode .lang-menu {
  --bg: #fff8f1;
  --ink: #2a1212;
  --muted: #7a4545;
  --accent: #8b0000;
  --gold: #8b0000;
  --border: #e8c8c8;
  background: #ffffff;
}

body.light-mode .header-button:hover,
body.light-mode #menu-toggle:hover,
body.light-mode nav.site-nav a:hover,
body.light-mode .lang-menu a:hover {
  background: #8b0000;
  color: #ffffff;
  text-shadow: none;
}

body.light-mode .protocol-pill {
  background: #ffffff;
}

body.light-mode .protocol-pill:hover,
body.light-mode .protocol-pill:focus-visible {
  color: #ffffff;
}

/* ---- Responsive (header only) ---- */
@media (max-width: 720px) {
  .header-inner { gap: var(--space-sm); }
  .brand { min-width: 0; flex: 1 1 auto; }
  .header-controls {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: var(--space-sm);
    row-gap: var(--space-xs);
  }
  .protocol-pills {
    order: 4;
    flex-basis: 100%;
    justify-content: flex-end;
  }
  #lang-toggle { white-space: nowrap; }
}

@media (max-width: 600px) {
  .brand-text span { display: none; }
}

@media (max-width: 520px) {
  .header-inner { position: relative; padding: var(--space-sm) var(--space-md); }
  nav.site-nav { min-width: 200px; max-width: calc(100vw - 2 * var(--space-md)); }
  .lang-menu { right: auto; left: 0; max-width: calc(100vw - 32px); }
  .header-button { padding: 4px 6px; }
  .header-icon-button { width: 34px; min-width: 34px; height: 34px; padding: 0; }
  .protocol-pills { justify-content: flex-start; }
  .protocol-pill { min-height: 32px; padding-inline: 9px; font-size: 0.82rem; }
}

@media (max-width: 380px) {
  .header-button { font-size: var(--fs-xs); padding: 3px 5px; }
}

@media (prefers-reduced-motion: reduce) {
  #menu-toggle.active { transform: none; }
}