/* nav.css — top navigation */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav__brand span {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--color-text);
  opacity: 1;
}

.nav__link--active {
  color: var(--color-text);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

/* Mobile: hide labels, show icons or abbreviate */
@media (max-width: 640px) {
  .nav__links { gap: var(--space-4); }
  .nav__link  { font-size: var(--text-xs); }
}