/* Navigation styles - tabs on desktop, hamburger on mobile */

.site-nav {
  width: min(1400px, 95vw);
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

/* Desktop: tab links visible, hamburger hidden */
.nav-tabs {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-tabs a {
  display: block;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.nav-tabs a:hover {
  color: var(--color-text-primary);
  background: rgba(71, 156, 240, 0.08);
  text-decoration: none;
}

.nav-tabs a.active {
  color: var(--color-accent);
  background: rgba(71, 156, 240, 0.1);
  border-color: rgba(71, 156, 240, 0.25);
}

/* Hamburger button — hidden on desktop */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  margin-left: auto;
}

.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: background 0.15s;
}

.nav-hamburger:hover span {
  background: var(--color-text-primary);
}

/* Mobile dropdown menu — hidden until open */
.nav-mobile-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 180px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
  overflow: hidden;
  z-index: 100;
}

.nav-mobile-menu.open {
  display: block;
}

.nav-mobile-menu a {
  display: block;
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color 0.15s, background 0.15s;
}

.nav-mobile-menu a:last-child {
  border-bottom: none;
}

.nav-mobile-menu a:hover,
.nav-mobile-menu a.active {
  color: var(--color-text-primary);
  background: rgba(71, 156, 240, 0.08);
}

.nav-mobile-menu a.active {
  color: var(--color-accent);
}

/* Wrapper needed for relative positioning of dropdown */
.nav-mobile-wrapper {
  position: relative;
}

/* Mobile: hide tabs, show hamburger */
@media (max-width: 640px) {
  .nav-tabs {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }
}