/* Site chrome: site-header (with nav + mobile menu) and site-footer. Loaded on every page. */

/* ── site-header ───────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s;
}
.site-header:hover,
.site-header.is-open { border-bottom-color: var(--rule); }

/* ── nav ───────────────────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px var(--pad);
  max-width: var(--maxw);
  margin: 0 auto;
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); }
.brand img { display: block; height: 28px; width: auto; }
.brand-mono {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand-dot { color: var(--brand-deep); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-3);
}
.nav-links a { transition: color .15s; }
.nav-links a:hover { color: var(--ink); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  font-size: 12px;
  background: var(--paper);
  color: var(--ink) !important;
  transition: all .2s;
}
.nav-cta:hover { border-color: var(--brand); }

/* ── language switcher ───────────────────────────────────────────────── */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
}
.lang-switch .lang-link {
  padding: 2px 6px;
  border-radius: 3px;
  text-decoration: none;
  color: inherit;
  transition: color .15s, background .15s;
}
.lang-switch .lang-link:hover { color: var(--ink); }
.lang-switch .lang-link.is-on {
  color: var(--ink);
  background: var(--rule);
}
.lang-switch-mobile { margin-top: 12px; }
.nav-cta .dot {
  width: 7px; height: 7px;
  background: var(--brand);
  border-radius: 50%;
  box-shadow: 0 0 0 0 var(--brand);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(45,202,61,.55); }
  50%     { box-shadow: 0 0 0 6px rgba(45,202,61,0); }
}
/* ── mobile menu toggle (hamburger) ───────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0 9px;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 4px;
  cursor: pointer;
  transition: border-color .2s;
}
.nav-toggle:hover { border-color: var(--brand); }
.nav-toggle-bar {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.site-header.is-open .nav-toggle-bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.site-header.is-open .nav-toggle-bar:nth-child(2) { opacity: 0; }
.site-header.is-open .nav-toggle-bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── mobile menu panel ────────────────────────────────────────────────── */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px var(--pad) 18px;
  max-width: var(--maxw);
  margin: 0 auto;
  font-family: var(--mono);
  font-size: 14px;
  border-top: 1px solid var(--rule);
}
.mobile-menu a {
  padding: 12px 4px;
  color: var(--ink-2);
  border-bottom: 1px solid var(--rule);
  transition: color .15s;
}
.mobile-menu a:last-child { border-bottom: 0; }
.mobile-menu a:hover { color: var(--ink); }
.mobile-menu .nav-cta {
  margin-top: 12px;
  justify-content: center;
  padding: 11px 14px;
  border-bottom: 1px solid var(--rule);
}

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-header.is-open .mobile-menu { display: flex; }
}

/* ── footer ───────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--rule);
  padding: clamp(48px, 6vw, 80px) var(--pad) 24px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 2.4fr;
  gap: clamp(32px, 5vw, 72px);
  margin-bottom: 48px;
}
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-brand img { display: block; height: 26px; width: auto; align-self: flex-start; }
.footer-tagline {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-3);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  font-family: var(--mono);
}
@media (max-width: 640px) { .footer-cols { grid-template-columns: repeat(2, 1fr); } }
.footer-cols h4 {
  font-size: 10.5px;
  margin: 0 0 14px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}
.footer-cols div { display: flex; flex-direction: column; gap: 8px; }
.footer-cols a {
  font-size: 13px;
  color: var(--ink-2);
  transition: color .15s;
}
.footer-cols a:hover { color: var(--brand-ink); }

.footer-bar {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--rule);
  padding-top: 22px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}