/* ==========================================================================
   Phonological Rule Editor Styles - Swiss Typographic Style
   Strict Grid, Stark Contrast, High Precision Typography
   ========================================================================== */

/* Main Stage */
.main-stage {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
  min-width: 0;
}

/* 1. Prominent Text Notation Section */
.notation-prominent-section {
  background: #ffffff;
}

.syntax-guide-pill {
  font-size: 11px;
  color: #a1a1aa;
}

.syntax-guide-pill code {
  font-family: var(--font-mono);
  background: #ffffff;
  padding: 1px 4px;
  border: 1px solid var(--border-light);
  color: var(--text-main);
}

.notation-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.prominent-input-row {
  padding: 10px 14px;
  background: #ffffff;
}

.swiss-text-input-prominent {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  background: #ffffff;
  color: var(--text-main);
  outline: none;
  letter-spacing: 0.01em;
}

.swiss-text-input-prominent:focus {
  border-width: 2px;
  padding: 7px 11px;
}

.swiss-text-input-prominent::placeholder {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 400;
  color: var(--text-dim);
}

/* Collapsible KaTeX Drawer */
.katex-drawer {
  display: none;
  padding: 10px 14px;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-strong);
}

.katex-drawer.open {
  display: block;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.drawer-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.swiss-code-area {
  width: 100%;
  height: 60px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  color: var(--text-main);
  resize: vertical;
  outline: none;
}

/* 2. Side-by-Side Workspace Split Grid */
.workspace-split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}

@media (max-width: 980px) {
  .workspace-split-grid {
    grid-template-columns: 1fr;
  }
}

.split-col {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.display-col {
  background: #ffffff;
}

.preview-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.font-toggle-group {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  height: 22px;
}

.font-toggle-group .toggle-btn {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  padding: 0 8px;
  height: 100%;
  border: none;
  background: #ffffff;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.font-toggle-group .toggle-btn.active {
  background: var(--text-main);
  color: #ffffff;
}

.zoom-group {
  display: flex;
  align-items: center;
  gap: 2px;
}

.icon-btn {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  height: 22px;
  padding: 0 6px;
  background: #ffffff;
  border: 1px solid var(--border-strong);
  color: var(--text-main);
  cursor: pointer;
  line-height: 1;
}

.icon-btn:hover {
  background: var(--text-main);
  color: #ffffff;
}

.preview-canvas-wrapper {
  padding: 16px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 140px;
  height: 100%;
  flex: 1;
  background-color: #ffffff;
  overflow-x: auto;
  overflow-y: hidden;
  user-select: none;
}

.katex-render-target {
  font-size: 21px;
  line-height: 1.4;
  text-align: center;
  color: var(--text-main);
  transition: transform 0.1s ease;
  transform-origin: center center;
  max-width: 100%;
}

.katex-render-target.font-sans .katex {
  font-family: var(--font-ui) !important;
}

.katex-render-target .katex-display {
  margin: 0;
}

/* Right Column: Rule Slots GUI */
.slots-col {
  background: #ffffff;
}

.slots-help-badge {
  font-size: 10px;
  color: #a1a1aa;
  font-weight: 500;
}

.slots-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 10px;
  gap: 6px;
  flex-wrap: nowrap;
  overflow-x: auto;
  flex: 1;
  min-height: 140px;
  background: #ffffff;
}

/* Slot Card */
.slot-card {
  flex: 1 1 0;
  min-width: 90px;
  max-width: 135px;
  height: 115px;
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  position: relative;
  transition: border-color 0.1s ease;
}

.slot-card:hover {
  border-color: var(--border-strong);
}

.slot-card.active {
  border: 2px solid var(--accent-red);
}

.slot-header {
  height: 26px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-strong);
}

.slot-card.active .slot-header {
  background: #ffe4e6;
}

.slot-name {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--text-main);
}

.slot-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.mini-btn {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  padding: 1px 4px;
  background: #ffffff;
  border: 1px solid var(--border-strong);
  color: var(--text-main);
  cursor: pointer;
  line-height: 1.2;
}

.mini-btn:hover {
  border-color: var(--border-strong);
  background: var(--text-main);
  color: #ffffff;
}

.slot-body {
  padding: 6px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: center;
  align-items: stretch;
}

/* Direct Input inside Slot */
.slot-direct-input {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  padding: 4px 6px;
  border: 1px dashed var(--border-mid);
  background: #ffffff;
  color: var(--text-main);
  outline: none;
}

.slot-direct-input:focus {
  border: 1px solid var(--border-strong);
}

.slot-direct-input::placeholder {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 400;
  color: var(--text-dim);
}

/* Slot Matrix representation */
.slot-matrix-box {
  border-left: 2px solid var(--border-strong);
  border-right: 2px solid var(--border-strong);
  padding: 2px 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--bg-subtle);
}

.matrix-feature-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  background: #ffffff;
  padding: 1px 4px;
  border: 1px solid var(--border-light);
}

.matrix-feature-name {
  color: var(--text-main);
  font-weight: 600;
}

.matrix-feature-del {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1;
  padding-left: 4px;
}

.matrix-feature-del:hover {
  color: var(--accent-red);
}

/* Rule Operators & Dividers between slots */
.slot-operator {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  padding: 4px 6px;
  cursor: pointer;
  user-select: none;
  border: 1px solid transparent;
}

.slot-operator:hover {
  border-color: var(--border-strong);
  background: var(--bg-subtle);
}

.slot-slash {
  font-size: 22px;
  font-weight: 400;
  color: var(--text-muted);
  padding: 0 2px;
  user-select: none;
}

.slot-underline {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
  padding: 0 2px;
  letter-spacing: -2px;
  user-select: none;
}

/* 3. Quick Palette Section */
.palette-section {
  background: #ffffff;
}

.palette-hint {
  font-size: 10px;
  color: #a1a1aa;
  font-weight: 500;
}

.palette-groups {
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  gap: 8px;
}

.palette-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* Strictly ensure palette row titles have identical 155px width for immaculate left alignment */
.palette-group-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-main);
  width: 155px;
  min-width: 155px;
  max-width: 155px;
  flex-shrink: 0;
  white-space: nowrap;
}

.custom-feature-group .palette-group-title {
  width: 143px;
  min-width: 143px;
  max-width: 143px;
}

/* Custom Feature Maker Widget */
.custom-feature-group {
  background: var(--bg-subtle);
  padding: 6px 10px;
  border: 1px solid var(--border-strong);
}

.custom-feature-maker {
  display: flex;
  align-items: center;
  gap: 6px;
}

.custom-val-toggle {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  height: 26px;
}

.custom-val-toggle .toggle-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 0 8px;
  height: 100%;
  border: none;
  background: #ffffff;
  color: var(--text-muted);
  cursor: pointer;
}

.custom-val-toggle .toggle-btn.active {
  background: var(--text-main);
  color: #ffffff;
}

.custom-feature-input {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 0 8px;
  height: 26px;
  width: 220px;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  color: var(--text-main);
  outline: none;
}

.custom-feature-input:focus {
  border-width: 2px;
  padding-left: 7px;
}

.custom-feature-input::placeholder {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 400;
  color: var(--text-dim);
}

/* Chips */
.chip-container {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  padding: 0 8px;
  height: 24px;
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  color: var(--text-main);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background-color 0.1s, color 0.1s;
}

.chip:hover {
  background: var(--text-main);
  color: #ffffff;
}

.chip:active {
  background: var(--border-mid);
  color: #ffffff;
}

.chip-phoneme {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  min-width: 26px;
  padding: 0 6px;
}

.chip-symbol {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  min-width: 26px;
  padding: 0 6px;
}

.chip-feature {
  font-family: var(--font-mono);
  font-size: 10px;
}

.chip-custom {
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  color: var(--text-main);
  font-weight: 700;
}

.chip-custom:hover {
  background: var(--text-main);
  color: #ffffff;
}