/* ============================================
   Form Designer - Visual Form Builder Styles
   ============================================ */

/* --- Toolbar --- */
.fd-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  gap: 12px;
  flex-wrap: wrap;
}

.fd-toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 200px;
}

.fd-form-name-input {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  outline: none;
  width: 240px;
  transition: border-color 0.2s;
}

.fd-form-name-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.15);
}

.fd-toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.fd-toolbar-btn {
  padding: 6px 16px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.fd-toolbar-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.fd-toolbar-btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.fd-toolbar-btn.primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
}

.fd-toolbar-btn.danger:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* --- Three-column container --- */
.fd-container {
  display: flex;
  height: calc(100vh - 110px);
  overflow: hidden;
}

/* --- Left Palette Panel --- */
.fd-palette {
  width: 240px;
  min-width: 240px;
  background: #fff;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px 0;
}

.fd-palette-title {
  font-size: 13px;
  font-weight: 600;
  color: #999;
  padding: 8px 16px 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fd-palette-group {
  margin-bottom: 4px;
}

.fd-palette-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
  transition: background 0.15s;
}

.fd-palette-group-header:hover {
  background: var(--primary-light);
}

.fd-palette-group-arrow {
  font-size: 10px;
  transition: transform 0.2s;
  color: #999;
}

.fd-palette-group.collapsed .fd-palette-group-arrow {
  transform: rotate(-90deg);
}

.fd-palette-group.collapsed .fd-palette-group-items {
  display: none;
}

.fd-palette-group-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px 12px 8px;
}

.fd-palette-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  background: #fff;
  font-size: 12px;
  color: var(--text);
  gap: 4px;
  user-select: none;
}

.fd-palette-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(24, 144, 255, 0.15);
}

.fd-palette-item:active {
  transform: translateY(0);
}

.fd-palette-item-icon {
  font-size: 20px;
  line-height: 1;
}

.fd-palette-item-label {
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* --- Center Canvas --- */
.fd-canvas {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  background: var(--bg);
  min-width: 0;
}

.fd-canvas-inner {
  max-width: 720px;
  margin: 0 auto;
}

.fd-canvas-header {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.fd-canvas-desc {
  font-size: 13px;
  color: #999;
  margin-bottom: 16px;
}

/* Empty state */
.fd-canvas-empty {
  border: 2px dashed #d9d9d9;
  border-radius: 8px;
  padding: 60px 20px;
  text-align: center;
  color: #bbb;
  background: #fff;
  margin-top: 20px;
}

.fd-canvas-empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.5;
}

.fd-canvas-empty-text {
  font-size: 15px;
  margin-bottom: 4px;
  color: #999;
}

.fd-canvas-empty-hint {
  font-size: 12px;
  color: #bbb;
}

/* --- Field Cards --- */
.fd-field-card {
  display: flex;
  align-items: center;
  background: #fff;
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  gap: 10px;
}

.fd-field-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.fd-field-card.selected {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 2px 8px rgba(24, 144, 255, 0.2);
}

.fd-field-drag {
  cursor: grab;
  color: #ccc;
  font-size: 16px;
  letter-spacing: -2px;
  padding: 4px 2px;
  user-select: none;
  line-height: 1;
  flex-shrink: 0;
}

.fd-field-drag:active {
  cursor: grabbing;
}

.fd-field-info {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex-wrap: wrap;
}

.fd-field-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fd-field-type-badge {
  font-size: 11px;
  background: #f5f5f5;
  color: #888;
  padding: 2px 8px;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

.fd-required {
  color: var(--danger);
  font-weight: bold;
  font-size: 16px;
  flex-shrink: 0;
}

.fd-field-del {
  background: none;
  border: none;
  color: #ccc;
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.15s;
  flex-shrink: 0;
  line-height: 1;
}

.fd-field-del:hover {
  color: var(--danger);
  background: #fff1f0;
}

/* Sortable ghost/drag states */
.fd-field-card.sortable-ghost {
  opacity: 0.4;
  border: 2px dashed var(--primary);
}

.fd-field-card.sortable-chosen {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* --- Right Props Panel --- */
.fd-props {
  width: 300px;
  min-width: 300px;
  background: #fff;
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 0;
}

.fd-props-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #bbb;
  font-size: 13px;
  padding: 40px 20px;
  text-align: center;
}

.fd-props-empty-icon {
  font-size: 36px;
  margin-bottom: 10px;
  opacity: 0.4;
}

.fd-props-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
}

.fd-props-section {
  padding: 14px 16px;
  border-bottom: 1px solid #f5f5f5;
}

.fd-props-section-title {
  font-size: 12px;
  font-weight: 600;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.fd-props-row {
  margin-bottom: 10px;
}

.fd-props-row:last-child {
  margin-bottom: 0;
}

.fd-props-label {
  display: block;
  font-size: 12px;
  color: #666;
  margin-bottom: 4px;
  font-weight: 500;
}

.fd-props-input {
  width: 100%;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 13px;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.fd-props-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.1);
}

.fd-props-textarea {
  resize: vertical;
  min-height: 60px;
  font-family: inherit;
}

.fd-props-select {
  appearance: auto;
}

.fd-props-checkbox-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
}

.fd-props-checkbox-row input[type="checkbox"] {
  accent-color: var(--primary);
  width: 15px;
  height: 15px;
}

/* Width toggle buttons */
.fd-width-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.fd-width-btn {
  flex: 1;
  padding: 5px 8px;
  border: none;
  background: #fff;
  font-size: 12px;
  cursor: pointer;
  color: #666;
  text-align: center;
  transition: all 0.15s;
  border-right: 1px solid var(--border);
}

.fd-width-btn:last-child {
  border-right: none;
}

.fd-width-btn:hover {
  background: #fafafa;
}

.fd-width-btn.active {
  background: var(--primary);
  color: #fff;
}

/* --- Option rows (for select/radio/checkbox) --- */
.fd-option-list {
  max-height: 200px;
  overflow-y: auto;
}

.fd-option-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.fd-option-row input {
  flex: 1;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 12px;
  outline: none;
  min-width: 0;
}

.fd-option-row input:focus {
  border-color: var(--primary);
}

.fd-option-del {
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  font-size: 16px;
  padding: 2px 4px;
  border-radius: 3px;
  flex-shrink: 0;
  line-height: 1;
}

.fd-option-del:hover {
  color: var(--danger);
  background: #fff1f0;
}

.fd-option-add {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px dashed var(--border);
  border-radius: 4px;
  background: #fff;
  color: #999;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  margin-top: 4px;
}

.fd-option-add:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* --- Condition rows --- */
.fd-condition-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  padding: 8px;
  background: #fafafa;
  border-radius: 6px;
  border: 1px solid #f0f0f0;
}

.fd-condition-row select,
.fd-condition-row input {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 12px;
  outline: none;
}

.fd-condition-row select:focus,
.fd-condition-row input:focus {
  border-color: var(--primary);
}

.fd-condition-row select {
  flex: 1;
  min-width: 80px;
}

.fd-condition-row input {
  flex: 1;
  min-width: 60px;
}

.fd-condition-remove {
  background: none;
  border: none;
  color: #ccc;
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
}

.fd-condition-remove:hover {
  color: var(--danger);
}

/* --- Preview Modal --- */
.fd-preview-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fdFadeIn 0.2s;
}

.fd-preview-modal {
  background: #fff;
  border-radius: 12px;
  width: 90%;
  max-width: 640px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  animation: fdSlideUp 0.25s;
}

.fd-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.fd-preview-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.fd-preview-close {
  background: none;
  border: none;
  font-size: 22px;
  color: #999;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
}

.fd-preview-close:hover {
  background: #f5f5f5;
  color: var(--text);
}

/* --- Animations --- */
@keyframes fdFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fdSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Toast / Notification --- */
.fd-toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 13px;
  color: #fff;
  z-index: 2000;
  animation: fdFadeIn 0.2s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.fd-toast.success { background: var(--primary); }
.fd-toast.error { background: var(--danger); }
.fd-toast.info { background: var(--info); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .fd-container {
    flex-direction: column;
    height: auto;
  }

  .fd-palette {
    width: 100%;
    min-width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 200px;
  }

  .fd-palette-group-items {
    grid-template-columns: repeat(4, 1fr);
  }

  .fd-canvas {
    min-height: 300px;
  }

  .fd-props {
    width: 100%;
    min-width: 100%;
    border-left: none;
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 600px) {
  .fd-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .fd-toolbar-left {
    justify-content: center;
  }

  .fd-form-name-input {
    width: 100%;
  }

  .fd-toolbar-right {
    justify-content: center;
    flex-wrap: wrap;
  }

  .fd-palette-group-items {
    grid-template-columns: repeat(3, 1fr);
  }

  .fd-preview-modal {
    width: 95%;
    padding: 16px;
  }
}

/* --- Scrollbar styling --- */
.fd-palette::-webkit-scrollbar,
.fd-canvas::-webkit-scrollbar,
.fd-props::-webkit-scrollbar {
  width: 6px;
}

.fd-palette::-webkit-scrollbar-thumb,
.fd-canvas::-webkit-scrollbar-thumb,
.fd-props::-webkit-scrollbar-thumb {
  background: #ddd;
  border-radius: 3px;
}

.fd-palette::-webkit-scrollbar-thumb:hover,
.fd-canvas::-webkit-scrollbar-thumb:hover,
.fd-props::-webkit-scrollbar-thumb:hover {
  background: #bbb;
}