/* ==========================================================================
   ToolSuite - UI Components (Clean, Modern & Minimal)
   Buttons, Inputs, Dropzones, Tabs, Modals, Toasts, Sliders, Split-views
   ========================================================================== */

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 0.95rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.82rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
}

.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-hover);
}

/*btn-gradient redirects to a clean solid primary button */
.btn-gradient {
  background: var(--accent-primary);
  color: #ffffff;
}

.btn-gradient:hover {
  background: var(--accent-primary-hover);
}

.btn-danger {
  background: transparent;
  border-color: var(--border-color);
  color: var(--accent-rose);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--accent-rose);
}

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
  border-radius: var(--radius-xs);
}

.btn-lg {
  padding: 0.65rem 1.25rem;
  font-size: 0.92rem;
  border-radius: var(--radius-sm);
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.8rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.85rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.5;
}

.font-code {
  font-family: var(--font-mono) !important;
  font-size: 0.82rem !important;
}

/* Range Sliders */
.slider-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.slider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

.slider-val-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-xs);
  background: var(--border-color);
  color: var(--text-secondary);
  font-weight: 500;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
}

/* Switches & Checkboxes */
.switch-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.switch-input {
  display: none;
}

.switch-slider {
  width: 36px;
  height: 20px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  position: relative;
  transition: background var(--transition-fast);
}

.switch-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  transition: transform var(--transition-fast);
}

.switch-input:checked + .switch-slider {
  background: var(--accent-primary);
}

.switch-input:checked + .switch-slider::before {
  transform: translateX(16px);
}

/* Drag & Drop Upload Zone */
.dropzone {
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem 1.25rem;
  text-align: center;
  background: var(--bg-card);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent-primary);
  background: var(--bg-card-hover);
}

.dropzone-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.dropzone-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.dropzone-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.dropzone input[type="file"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* Split Pane Layout */
.split-pane-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  min-height: 480px;
}

@media (max-width: 850px) {
  .split-pane-container {
    grid-template-columns: 1fr;
  }
}

.pane-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.pane-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pane-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.pane-body {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 260px;
  max-width: 380px;
  padding: 0.75rem 1rem;
  background: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.82rem;
  font-weight: 500;
  transform: translateX(120%);
  animation: slideInToast 0.2s forwards ease;
}

.toast.toast-exit {
  animation: slideOutToast 0.2s forwards ease;
}

@keyframes slideInToast {
  to { transform: translateX(0); }
}

@keyframes slideOutToast {
  to { transform: translateX(120%); opacity: 0; }
}

.toast-success {
  border-left: 3px solid var(--accent-emerald);
}
.toast-error {
  border-left: 3px solid var(--accent-rose);
}
.toast-info {
  border-left: 3px solid var(--accent-primary);
}

.toast-icon {
  font-size: 1rem;
}

.toast-content {
  flex: 1;
}

/* Quick Search Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.search-modal {
  width: 100%;
  max-width: 540px;
  background: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.search-modal-header {
  display: flex;
  align-items: center;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  gap: 0.6rem;
}

.search-modal-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-main);
  outline: none;
}

.search-modal-results {
  max-height: 340px;
  overflow-y: auto;
  padding: 0.5rem;
}

.search-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-item:hover, .search-item.selected {
  background: var(--border-subtle);
}

.search-item-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  background: var(--border-color);
  color: var(--text-primary);
}

.search-item-info {
  flex: 1;
}

.search-item-title {
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.search-item-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.search-item-category {
  font-size: 0.68rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-xs);
  background: var(--border-color);
  color: var(--text-muted);
}

.search-modal-footer {
  padding: 0.6rem 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Spinner Loader */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Progress bar */
.progress-bar-container {
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 0.5rem 0;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 0.2s ease;
}