/* ═══════════════════════════════════════════
   NAV.CSS — Navigation & Footer
═══════════════════════════════════════════ */

nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--nav-bg);
  backdrop-filter: blur(24px) saturate(1.5);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  height: 62px;
  display: flex;
  align-items: center;
  padding: 0 var(--page-px);
  justify-content: space-between;
  transition: background var(--t), border-color var(--t);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo img {
  height: 32px;
  width: auto;
  transition: opacity var(--t);
}
.nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.nav-logo-name {
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-1);
  line-height: 1;
}
.nav-logo-sub {
  font-family: 'DM Mono', monospace;
  font-size: 0.58rem;
  letter-spacing: 0.16em;
  color: var(--text-3);
  text-transform: uppercase;
}

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--text-2);
  padding: 7px 14px;
  border-radius: 6px;
  border: none;
  background: none;
  transition: color var(--t), background var(--t);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.nav-link:hover {
  color: var(--text-1);
  background: var(--border);
}
.nav-link.active {
  color: var(--text-1);
  background: var(--surface);
  border: 1px solid var(--border-mid);
  font-weight: 500;
}

/* Right controls */
.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.lang-toggle {
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--text-2);
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-mid);
  background: var(--surface);
  transition: all var(--t);
  cursor: pointer;
}
.lang-toggle:hover {
  color: var(--text-1);
  border-color: var(--accent);
}
.theme-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border-mid);
  background: var(--surface);
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t);
  cursor: pointer;
}
.theme-btn:hover {
  color: var(--text-1);
  border-color: var(--accent);
}
.theme-btn svg { width: 15px; height: 15px; }

/* ── FOOTER ── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  margin-top: auto;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 52px var(--page-px) 32px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-logo img { height: 26px; }
.footer-tagline {
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--text-2);
  max-width: 240px;
}
.footer-col-title {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  color: var(--text-3);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-link {
  font-size: 0.8rem;
  color: var(--text-2);
  transition: color var(--t);
  background: none;
  border: none;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}
.footer-link:hover { color: var(--accent); }

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px var(--page-px) 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
}
.footer-copy {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
}
.footer-cert {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}