/* Shared by every public page; keep navigation independent of page themes. */
html {
  --site-nav-height: calc(70px + env(safe-area-inset-top, 0px));
  scrollbar-gutter: stable;
  scroll-padding-top: calc(var(--site-nav-height) + 16px);
}

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-sizing: border-box;
  height: var(--site-nav-height);
  padding: env(safe-area-inset-top, 0px) 60px 0;
  border-bottom: 1px solid #1e293b;
  background: rgba(3, 5, 7, .95);
  backdrop-filter: blur(20px);
  font: 400 16px/1.55 'Inter', sans-serif;
}

.site-nav-logo {
  flex: 0 0 auto;
  color: #fff;
  font: 900 1.3rem/1.55 'Orbitron', monospace;
  letter-spacing: .15em;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav-logo em { color: #a855f7; font-style: normal; }

.site-nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  margin-left: auto;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
  scrollbar-color: #475569 transparent;
}

.site-nav-link,
.site-nav-download {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  min-height: 38px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 2px;
  color: #64748b;
  background: transparent;
  font: 700 .72rem/1.55 'Orbitron', monospace;
  letter-spacing: .12em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
  transition: color .2s, border-color .2s, background .2s;
}

.site-nav-link:hover,
.site-nav-link[aria-current="page"] {
  color: #fff;
  border-color: #263147;
  background: rgba(255, 255, 255, .03);
}

.site-nav .site-nav-download {
  padding: 9px 20px;
  color: #000;
  background: #fff;
  font-size: .78rem;
  letter-spacing: .1em;
}

.site-nav-download:hover { opacity: .85; }
.site-nav a:focus-visible { outline: 2px solid #a855f7; outline-offset: -2px; }

.site-nav-toggle { display: none; }
.site-nav-toggle .site-nav-toggle-label { margin: 0; font: inherit; }

@media (max-width: 1350px) {
  .site-nav { gap: 20px; padding-inline: 24px; }
  .site-nav-actions { gap: 8px; }
  .site-nav-link { padding-inline: 8px; font-size: .66rem; }
  .site-nav .site-nav-download { padding-inline: 16px; font-size: .72rem; }
}

@media (max-width: 1100px) {
  .site-nav[data-menu-ready] { overflow: visible; }
  .site-nav[data-menu-ready] .site-nav-toggle {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 44px;
    margin: 0 0 0 auto;
    padding: 8px 14px;
    border: 1px solid #334155;
    border-radius: 4px;
    background: #0f1319;
    color: #e2e8f0;
    font: 700 .72rem/1.5 'Inter', sans-serif;
    letter-spacing: .06em;
    cursor: pointer;
  }
  .site-nav-toggle svg { width: 18px; height: 18px; flex: none; }
  .site-nav-toggle:focus-visible { outline: 2px solid #a855f7; outline-offset: 2px; }
  .site-nav-toggle[aria-expanded="true"] { border-color: #a855f7; }
  .site-nav[data-menu-ready] .site-nav-actions {
    display: none;
    position: absolute;
    top: 100%;
    right: max(16px, env(safe-area-inset-right, 0px));
    left: max(16px, env(safe-area-inset-left, 0px));
    max-width: 600px;
    max-height: calc(100vh - var(--site-nav-height) - 16px);
    max-height: calc(100dvh - var(--site-nav-height) - 16px);
    margin-left: auto;
    padding: 12px;
    gap: 6px;
    overflow-y: auto;
    overscroll-behavior: contain;
    border: 1px solid #334155;
    border-radius: 0 0 8px 8px;
    background: #080c12;
    box-shadow: 0 18px 40px #0009;
  }
  .site-nav-toggle[aria-expanded="true"] + .site-nav-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .site-nav[data-menu-ready] .site-nav-link,
  .site-nav[data-menu-ready] .site-nav-download {
    justify-content: flex-start;
    min-height: 44px;
    padding: 12px;
    color: #cbd5e1;
    font-size: .7rem;
    letter-spacing: .06em;
    white-space: normal;
  }
  .site-nav[data-menu-ready] .site-nav-link[aria-current="page"] {
    color: #fff;
    border-color: #6b21a8;
    background: #a855f71a;
  }
  .site-nav[data-menu-ready] .site-nav-download { grid-column: 1 / -1; justify-content: center; color: #000; }
}

@media (max-width: 640px) {
  html { --site-nav-height: calc(64px + env(safe-area-inset-top, 0px)); }
  .site-nav {
    gap: 12px;
    padding-left: max(16px, env(safe-area-inset-left, 0px));
    padding-right: max(16px, env(safe-area-inset-right, 0px));
  }
  .site-nav-logo { font-size: 1.05rem; letter-spacing: .12em; }
  .site-nav-actions { gap: 8px; }
  .site-nav-link { min-height: 44px; padding: 10px 8px; font-size: .62rem; letter-spacing: .08em; }
  .site-nav .site-nav-download { min-height: 44px; padding: 10px 18px; font-size: .72rem; }
}

@media (max-width: 400px) {
  .site-nav-toggle[aria-expanded="true"] + .site-nav-actions { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav a { transition: none; }
}