.app-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  z-index: var(--z-header);
  height: 48px;
  /* Reduced height */
  width: 100%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  /* Slightly stronger shadow */
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

/* Left section: Logo + Navigation */
.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

/* Right section: Controls */
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

/* Responsive header container for larger screens */
@media (min-width: 2150px) {
  .header-container {
    max-width: 1800px;
  }
}

@media (min-width: 3000px) {
  .header-container {
    max-width: 2400px;
  }
}

/* Logo and title styling */
.header-branding {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-color);
  gap: 8px;
}

.app-logo {
  width: 24px;
  height: 24px;
}

.app-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

/* Navigation styling */
.main-nav {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.nav-item {
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius-xs);
  color: var(--text-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  white-space: nowrap;
}

.nav-item:hover,
.nav-item:focus-visible {
  background-color: var(--lora-surface-hover, oklch(95% 0.02 256));
  color: var(--lora-accent);
}

.nav-item:hover i,
.nav-item:hover span,
.nav-item:focus-visible i,
.nav-item:focus-visible span {
  color: inherit;
}

.nav-item.active {
  background-color: var(--lora-accent);
  color: white;
}

/* Header search - Centered with VS Code command palette style */
.header-search {
  flex: 1;
  display: flex;
  justify-content: center;
  max-width: 600px;
  margin: 0 auto;
  transition: opacity 0.2s ease;
}

/* VS Code command palette style search container */
.header-search .search-container {
  width: 100%;
  max-width: 600px;
  position: relative;
  display: flex;
  align-items: center;
  background: var(--input-bg, var(--card-bg));
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm, 6px);
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.header-search .search-container:focus-within {
  border-color: var(--lora-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12), 0 0 0 1px var(--lora-accent);
  transform: translateY(-1px);
}

.header-search input {
  flex: 1;
  width: 100%;
  padding: 0.5rem 0.75rem;
  padding-left: 2.25rem !important;
  padding-right: 5rem !important;
  border: none;
  background: transparent;
  color: var(--text-color);
  font-size: 0.95rem;
  outline: none;
}

.header-search input::placeholder {
  color: var(--text-muted);
}

.header-search .search-icon {
  position: absolute;
  left: 0.75rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.header-search .search-options-toggle,
.header-search .search-filter-toggle {
  position: absolute;
  right: 0.5rem;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--border-radius-xs, 4px);
  transition: all 0.2s ease;
}

.header-search .search-options-toggle {
  right: 2.25rem;
}

.header-search .search-options-toggle:hover,
.header-search .search-filter-toggle:hover {
  background: var(--lora-surface-hover, oklch(95% 0.02 256));
  color: var(--lora-accent);
}

.header-search .filter-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 8px;
  height: 8px;
  background: var(--lora-accent);
  border-radius: 50%;
  font-size: 0;
}

/* Disabled state for header search */
.header-search.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.header-search.disabled input {
  background-color: var(--input-disabled-bg, #f5f5f5);
  color: var(--text-muted);
  cursor: not-allowed;
}

.header-search.disabled button {
  background-color: var(--button-disabled-bg, #e0e0e0);
  color: var(--text-muted);
  cursor: not-allowed;
}

.header-search.disabled .search-icon {
  color: var(--text-muted);
}

/* Dark theme specific styles for disabled header search */
[data-theme="dark"] .header-search.disabled input {
  background-color: #3a3a3a;
  color: #888888;
  border-color: #555555;
}

[data-theme="dark"] .header-search.disabled button {
  background-color: #3a3a3a;
  color: #888888;
  border-color: #555555;
}

[data-theme="dark"] .header-search.disabled .search-icon {
  color: #888888;
}

[data-theme="dark"] .header-search.disabled .fas {
  color: #888888;
}

/* Header controls (formerly corner controls) */
.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.header-controls>div {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.header-controls>div:hover {
  background: var(--lora-accent);
  color: white;
  transform: translateY(-2px);
}

.theme-toggle {
  position: relative;
  /* Ensure relative positioning for the container */
}

.theme-toggle .light-icon,
.theme-toggle .dark-icon,
.theme-toggle .auto-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  /* Center perfectly */
  opacity: 0;
  transition: opacity 0.3s ease;
}

/* Default state shows dark icon */
.theme-toggle .dark-icon {
  opacity: 1;
}

/* Light theme shows light icon */
.theme-toggle.theme-light .light-icon {
  opacity: 1;
}

.theme-toggle.theme-light .dark-icon,
.theme-toggle.theme-light .auto-icon {
  opacity: 0;
}

/* Dark theme shows dark icon */
.theme-toggle.theme-dark .dark-icon {
  opacity: 1;
}

.theme-toggle.theme-dark .light-icon,
.theme-toggle.theme-dark .auto-icon {
  opacity: 0;
}

/* Auto theme shows auto icon */
.theme-toggle.theme-auto .auto-icon {
  opacity: 1;
}

.theme-toggle.theme-auto .light-icon,
.theme-toggle.theme-auto .dark-icon {
  opacity: 0;
}

/* Badge styling */
.update-badge {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 8px;
  height: 8px;
  background-color: var(--lora-error);
  border-radius: 50%;
  border: 2px solid var(--card-bg);
  transition: all 0.2s ease;
  pointer-events: none;
  opacity: 0;
}

.update-badge.visible {
  opacity: 1;
}

/* Hamburger menu button - hidden by default */
.hamburger-menu-btn {
  display: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.hamburger-menu-btn:hover {
  background: var(--lora-accent);
  color: white;
}

/* Hamburger dropdown menu */
.hamburger-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm, 6px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  padding: 0.5rem;
  min-width: 160px;
  z-index: var(--z-dropdown, 200);
}

.hamburger-dropdown.active {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.hamburger-dropdown .dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius-xs, 4px);
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
  white-space: nowrap;
}

.hamburger-dropdown .dropdown-item:hover {
  background: var(--lora-surface-hover, oklch(95% 0.02 256));
  color: var(--lora-accent);
}

.hamburger-dropdown .dropdown-item i {
  width: 20px;
  text-align: center;
}

.hamburger-dropdown .dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: 0.25rem 0;
}

/* Responsive: Early optimization at 1200px - reduce gaps and padding */
@media (max-width: 1200px) {
  .header-container {
    gap: 0.75rem;
    padding: 0 12px;
  }

  .main-nav {
    gap: 0.25rem;
  }

  .nav-item {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
  }

  .header-controls {
    gap: 6px;
  }

  .header-controls > div {
    width: 30px;
    height: 30px;
  }
}

/* Responsive: Hide nav icons at 1100px to save space */
@media (max-width: 1100px) {
  .nav-item {
    gap: 0;
    padding: 0.25rem 0.4rem;
  }

  .nav-item i {
    display: none;
  }

  .header-search {
    max-width: 450px;
  }
}

@media (max-width: 950px) {
  .app-title {
    display: none !important;
  }

  .header-container {
    padding: 0 10px;
    gap: 0.5rem;
  }

  .header-controls {
    display: none !important;
  }

  .hamburger-menu-btn {
    display: flex !important;
  }

  .hamburger-dropdown {
    display: none;
  }

  .hamburger-dropdown.active {
    display: flex;
  }

  .header-search {
    max-width: none;
    margin: 0;
    flex: 1;
    min-width: 200px;
  }

  .main-nav {
    gap: 0.25rem;
    margin-right: 0;
  }

  .nav-item {
    padding: 0.25rem 0.35rem;
    font-size: 0.8rem;
  }
}

/* Responsive: Compact mode at 768px */
@media (max-width: 768px) {
  .header-search input {
    padding: 0.4rem 0.6rem;
    padding-left: 2rem !important;
    padding-right: 4.5rem !important;
    font-size: 0.9rem;
  }

  .header-search .search-container {
    border-radius: var(--border-radius-xs, 4px);
  }
}

/* For very small screens - switch nav to icons only */
@media (max-width: 600px) {
  .header-container {
    padding: 0 8px;
    gap: 0.4rem;
  }

  .main-nav {
    display: flex;
    gap: 0.15rem;
    margin-right: 0;
  }

  .nav-item {
    padding: 0.25rem;
    font-size: 0.75rem;
  }

  .nav-item span {
    display: none;
  }

  .nav-item i {
    display: block;
    font-size: 1rem;
  }
}

/* Position relative for hamburger menu positioning */
.header-right {
  position: relative;
}