/* === Components Stylesheet === */
/* Button, tool item, and UI component styles */

/* Skip navigation link (screen reader / keyboard users) */

.skip-nav {
  position: absolute;
  top: -100%;
  left: var(--spacing-md);
  z-index: 9999;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-accent);
  color: white;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition: top 0.1s;
}

.skip-nav:focus {
  top: var(--spacing-md);
}

/* Buttons */

button {
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:focus {
  outline: none;
}

button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Theme toggle button */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background-color: transparent;
  border-radius: var(--border-radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  transition: background-color var(--transition-fast);
}

.theme-toggle:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
}

.theme-toggle:active:not(:disabled) {
  background-color: var(--color-accent);
}

/* Copy button */

.copy-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-accent);
  color: white;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  transition: background-color var(--transition-fast);
}

.copy-btn:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
}

.copy-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.copy-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.copy-icon {
  font-size: var(--font-size-lg);
}

.copy-text {
  display: inline;
}

@media (max-width: 640px) {
  .copy-text {
    display: none;
  }

  .copy-btn {
    padding: var(--spacing-sm);
  }
}

/* Tool items in sidebar */

.tool-item {
  display: block;
  width: 100%;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  text-align: left;
  background-color: transparent;
  color: var(--color-text-primary);
  border: var(--border-width) solid transparent;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

.tool-item:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-border);
}

.tool-item.active {
  background-color: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.tool-item-name {
  display: block;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

.tool-item-desc {
  display: block;
  font-size: var(--font-size-xs);
  opacity: 0.8;
  font-weight: var(--font-weight-normal);
}

.tool-item.active .tool-item-desc {
  opacity: 0.9;
}

/* Collapsible category sections */

.tool-category-section {
  margin-top: var(--spacing-md);
}

.tool-category-section:first-child {
  margin-top: 0;
}

.tool-category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  user-select: none;
}

.tool-category-header:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.category-chevron {
  font-size: 14px;
  transition: transform 0.2s ease;
  line-height: 1;
}

.tool-category-section.collapsed .category-chevron {
  transform: rotate(-90deg);
}

/* Animated collapse using grid trick */

.tool-group {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 0.2s ease;
  overflow: hidden;
}

.tool-category-section.collapsed .tool-group {
  grid-template-rows: 0fr;
}

.tool-group-inner {
  min-height: 0;
}

/* Responsive tool items */

@media (max-width: 768px) {
  .tool-item {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-sm);
    flex: 0 1 auto;
    border-radius: var(--border-radius-sm);
  }

  .tool-item-name {
    margin-bottom: var(--spacing-xs);
  }

  .tool-item-desc {
    display: none;
  }

  .tool-category-header {
    display: none;
  }
}

/* Scrollbar styling for tool list */

.tool-list {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

/* Focus visible for keyboard navigation */

.tool-item:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -1px;
}

/* Utility button styles */

.btn-primary {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-accent);
  color: white;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
}

.btn-secondary {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-accent);
}

.btn-danger {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-error);
  color: white;
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-medium);
}

.btn-danger:hover:not(:disabled) {
  background-color: #dc2626;
}

/* Animation for button click feedback */

@keyframes button-press {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.95);
  }
  100% {
    transform: scale(1);
  }
}

button:active:not(:disabled) {
  animation: button-press 200ms ease-out;
}