.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: var(--sp-space-1);
  color: var(--sp-color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--sp-duration-fast) var(--sp-ease-default);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
}

.nav-dropdown-trigger:hover {
  color: var(--sp-color-text);
}

.nav-dropdown-trigger.nav-link--active {
  color: var(--sp-color-primary);
}

.dropdown-arrow {
  width: 12px;
  height: 12px;
  transition: transform var(--sp-duration-fast) var(--sp-ease-default);
  stroke: currentColor;
  fill: none;
}

.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  padding: var(--sp-space-4);
  margin-top: var(--sp-space-2);
  background: var(--sp-color-surface-elevated);
  border: 1px solid var(--sp-color-border);
  border-radius: var(--sp-corners-card-brand);
  box-shadow: var(--sp-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--sp-duration-fast) var(--sp-ease-default), visibility var(--sp-duration-fast);
  z-index: var(--sp-z-dropdown);
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.dropdown-section {
  margin-bottom: var(--sp-space-4);
}

.dropdown-section:last-child {
  margin-bottom: 0;
}

.dropdown-section h4 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--sp-color-text-muted);
  margin-bottom: var(--sp-space-2);
  font-family: var(--sp-font-brand);
}

.dropdown-section a,
.nav-dropdown-menu > a {
  display: block;
  padding: var(--sp-space-1) 0;
  color: var(--sp-color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--sp-duration-fast) var(--sp-ease-default);
}

.dropdown-section a:hover,
.nav-dropdown-menu > a:hover {
  color: var(--sp-color-primary);
}

.dropdown-section a.dropdown-link--has-desc {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  padding: var(--sp-space-2) var(--sp-space-3);
  margin: 0 calc(-1 * var(--sp-space-3));
  border-radius: var(--sp-radius-sm);
  color: inherit;
  transition: background-color var(--sp-duration-fast) var(--sp-ease-default);
}

.dropdown-section a.dropdown-link--has-desc:hover {
  background: var(--sp-color-surface-hover, rgba(0, 0, 0, 0.04));
  color: inherit;
}

.dropdown-link-label {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--sp-color-text);
}

.dropdown-section a.dropdown-link--has-desc:hover .dropdown-link-label {
  color: var(--sp-color-primary);
}

.dropdown-link-desc {
  display: block;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--sp-color-text-muted);
  line-height: 1.4;
}

.nav-dropdown-menu:not(.nav-dropdown-menu--narrow) {
  min-width: 360px;
  padding: var(--sp-space-4) var(--sp-space-3);
}

.nav-dropdown-menu--narrow {
  min-width: 140px;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--sp-color-border);
  border-radius: var(--sp-radius-sm);
  cursor: pointer;
  color: var(--sp-color-text-secondary);
  transition: background-color var(--sp-duration-fast) var(--sp-ease-out), color var(--sp-duration-fast) var(--sp-ease-out), border-color var(--sp-duration-fast) var(--sp-ease-out), box-shadow var(--sp-duration-fast) var(--sp-ease-out);
}

.theme-toggle-btn:hover {
  color: var(--sp-color-primary);
  border-color: var(--sp-color-primary);
}

.theme-icon-moon { display: block; }
.theme-icon-sun { display: none; }
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="dark"] .theme-icon-sun { display: block; }

a.dropdown-view-all {
  display: block;
  padding-top: var(--sp-space-4);
  margin-top: var(--sp-space-4);
  border-top: 1px solid var(--sp-color-border);
  color: var(--sp-color-primary-text);
  font-weight: 500;
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .theme-toggle-btn {
    min-width: 44px;
    min-height: 44px;
  }
}

@media (max-width: 480px) {
  .logo-svg {
    height: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-dropdown-trigger.nav-dropdown-trigger {
    transition: none;
  }

  .dropdown-arrow.dropdown-arrow {
    transition: none;
  }

  .nav-dropdown-menu.nav-dropdown-menu {
    transition: none;
  }

  .dropdown-section.dropdown-section a,
  .nav-dropdown-menu.nav-dropdown-menu > a {
    transition: none;
  }

  .theme-toggle-btn.theme-toggle-btn {
    transition: none;
  }
}