/* ==========================================================================
   zlogic — shared chrome: the cyber nav + footer used on EVERY page.
   Markup is injected from shared/partials/{header,footer}.html at build time.
   Themed via tokens.css so it works in both dark (cyber) and light (docs).
   ========================================================================== */

/* ---------- Nav ---------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 5%;
  background: var(--chrome-nav-bg);
  border-bottom: 1px solid var(--chrome-nav-border);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
}

.site-nav .logo {
  font-family: var(--mono);
  font-size: clamp(15px, 3vw, 18px);
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 1px;
  text-decoration: none;
  cursor: pointer;
  flex-shrink: 0;
}

:root[data-theme="dark"] .site-nav .logo {
  text-shadow: 0 0 8px var(--accent-cyan), 0 0 16px var(--accent-cyan);
}

.site-nav .logo::before {
  content: "> ";
  color: var(--accent-pink);
  animation: chrome-blink 1s step-end infinite;
}

@keyframes chrome-blink { 50% { opacity: 0; } }

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  position: relative;
  color: var(--text);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.5px;
  padding: 6px 4px;
  white-space: nowrap;
  transition: all 0.2s;
}

.nav-links a::before { content: "["; color: var(--accent-pink); opacity: 0; margin-right: 4px; transition: opacity 0.2s; }
.nav-links a::after  { content: "]"; color: var(--accent-pink); opacity: 0; margin-left: 4px; transition: opacity 0.2s; }

.nav-links a:hover { color: var(--accent-cyan); }
:root[data-theme="dark"] .nav-links a:hover { text-shadow: 0 0 8px var(--accent-cyan); }
.nav-links a:hover::before,
.nav-links a:hover::after { opacity: 1; }

.nav-links a[aria-current="page"],
.nav-links a.spy { color: var(--accent-cyan); }
.nav-links a[aria-current="page"]::before,
.nav-links a[aria-current="page"]::after,
.nav-links a.spy::before,
.nav-links a.spy::after { opacity: 1; }

/* ---------- Lang & theme toggles ---------- */
.lang-toggle,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1px;
  border: 1px solid var(--chrome-nav-border);
  background: var(--surface);
  color: var(--text);
  padding: 5px 10px;
  min-height: 30px;
  border-radius: 999px;
  cursor: pointer;
  line-height: 1;
}

.lang-toggle { gap: 2px; }
.theme-toggle { gap: 6px; }

.lang-toggle:hover,
.theme-toggle:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(5, 217, 232, 0.4);
}

.lang-toggle [data-lang],
.theme-toggle [data-theme-option] {
  padding: 0 4px;
  cursor: pointer;
  color: inherit;
}

.theme-toggle [data-theme-option] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
}

.lang-toggle .lang-active,
.theme-toggle .theme-active {
  color: var(--accent-cyan);
  font-weight: 700;
}

:root[data-theme="dark"] .lang-toggle .lang-active,
:root[data-theme="dark"] .theme-toggle .theme-active {
  text-shadow: 0 0 6px var(--accent-cyan);
}

.lang-toggle .lang-sep,
.theme-toggle .theme-sep { color: var(--text-faint); margin: 0 2px; }

/* ---------- Mobile burger ---------- */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--accent-pink);
  color: var(--accent-pink);
  width: 38px;
  height: 38px;
  cursor: pointer;
  border-radius: 2px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  box-shadow: 0 0 8px rgba(255, 42, 109, 0.3);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--accent-pink);
  transition: all 0.3s;
}

.menu-toggle.active span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  z-index: 10;
  border-top: 1px solid var(--chrome-footer-border);
  padding: 30px 20px;
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  background: var(--chrome-footer-bg);
  letter-spacing: 0.5px;
  font-family: var(--mono);
}

.site-footer a {
  color: var(--accent-cyan);
  text-decoration: none;
  margin: 0 8px;
  transition: all 0.2s;
}

.site-footer a:hover { color: var(--accent-pink); }
:root[data-theme="dark"] .site-footer a:hover { text-shadow: 0 0 8px var(--accent-pink); }

.site-footer .heart { color: var(--accent-pink); }
:root[data-theme="dark"] .site-footer .heart { text-shadow: 0 0 6px var(--accent-pink); }

.site-footer .footer-links { margin-top: 10px; }

.site-footer .system-status {
  margin-top: 14px;
  font-size: 10px;
  opacity: 0.5;
  letter-spacing: 2px;
}

/* ---------- Responsive nav ---------- */
@media (max-width: 768px) {
  .menu-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--chrome-nav-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    flex-direction: column;
    gap: 0;
    padding: 0;
    border-bottom: 1px solid var(--chrome-nav-border);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }

  .nav-links.active { transform: translateY(0); opacity: 1; visibility: visible; }

  .nav-links li { width: 100%; border-bottom: 1px solid var(--line); }

  .nav-links a { display: block; padding: 14px 24px; font-size: 13px; }
  .nav-links a::before, .nav-links a::after { display: none; }

  .lang-toggle, .theme-toggle { margin: 12px 24px; display: inline-flex; justify-content: center; }
}