.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav-logo:hover { color: var(--accent-hover); }

/* Right side: links + controls */
.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active,
.nav-links a[aria-current="page"] { color: var(--accent-hover); }
.nav-links a[target="_blank"]::after {
  content: ' ↗';
  font-size: 10px;
  opacity: 0.5;
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.theme-toggle:hover {
  color: var(--text);
  border-color: var(--text-muted);
  background: var(--surface-2);
}
.theme-toggle svg { pointer-events: none; }

/* Hamburger */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text);
  font-size: 18px;
  line-height: 1;
}

@media (max-width: 600px) {
  .menu-toggle { display: block; }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 24px 20px;
    gap: 0;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
  }
  .nav-links li:last-child a { border-bottom: none; }
}