/* === Custom Properties === */
:root {
  --font-devanagari: 'Noto Sans Devanagari', sans-serif;
  --font-latin: 'Inter', sans-serif;

  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #1a202c;
  --color-text-secondary: #64748b;
  --color-muted: #64748b;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-success: #22c55e;
  --color-error: #ef4444;

  /* Category colors for diagnostics (keyed by Rust enum variant names) */
  --cat-shuddha-table: #e11d48;
  --cat-hrasva-dirgha: #7c3aed;
  --cat-chandrabindu: #0891b2;
  --cat-sha-sha-s: #c2410c;
  --cat-ba-va: #0f766e;
  --cat-ri-kri: #4f46e5;
  --cat-halanta: #0d9488;
  --cat-aadhi-vriddhi: #dc2626;
  --cat-ya-e: #b45309;
  --cat-ksha-chhya: #be185d;
  --cat-gya-gyan: #7c2d12;
  --cat-sandhi: #059669;
  --cat-punctuation: #6366f1;
  --cat-default: #6b7280;

  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: 150ms ease;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-devanagari);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* === Loading Overlay === */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  margin-top: 1rem;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* === Header === */
.header {
  padding: 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.header-meta {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.header-build {
  font-family: var(--font-latin);
  font-size: 0.65rem;
  color: var(--color-text-secondary);
  opacity: 0.7;
}

.header-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.header-subtitle {
  font-family: var(--font-latin);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-rules-btn {
  font-size: 0.85rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.github-link {
  font-family: var(--font-latin);
  font-size: 0.82rem;
  font-weight: 500;
  gap: 0.35rem;
  text-decoration: none;
  background: #24292e;
  color: #ffffff;
  border-color: #24292e;
}

.github-link:hover {
  background: #1a1f24;
  border-color: #1a1f24;
  color: #ffffff;
}

.github-icon {
  width: 1em;
  height: 1em;
  fill: currentColor;
  flex-shrink: 0;
}

.footer-link {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-link:hover {
  color: var(--color-primary);
}

/* === Main === */
.main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.view { display: none; }
.view.active {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* === Buttons === */
.btn {
  font-family: var(--font-devanagari);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.btn:hover { background: var(--color-bg); border-color: var(--color-text-secondary); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.8rem; }

.btn-primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

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

/* === Spell Checker === */
.checker-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 1.25rem;
  flex: 1;
  min-height: 0;
}

.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
  min-height: 1.75rem;
}

.category-pill {
  font-family: var(--font-latin);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 500;
  border: 1.5px solid;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.category-pill.inactive { opacity: 0.35; }

.category-pill.empty {
  opacity: 0.22;
  cursor: default;
}

.category-pill .pill-count {
  background: rgba(0, 0, 0, 0.1);
  padding: 0 0.3rem;
  border-radius: 999px;
  font-size: 0.65rem;
}

.checker-editor-col {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* Editor */
.editor-container {
  flex: 1;
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  min-height: 350px;
  overflow: hidden;
}

.editor-backdrop,
.editor-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 1rem;
  font-family: var(--font-devanagari);
  font-size: 1.05rem;
  line-height: 1.8;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: break-word;
  overflow-y: auto;
}

.editor-backdrop {
  z-index: 1;
  color: transparent;
  pointer-events: none;
}

.editor-input {
  z-index: 2;
  background: transparent;
  color: var(--color-text);
  border: none;
  outline: none;
  resize: none;
  caret-color: var(--color-text);
}

/* Wavy underlines via marks */
.editor-backdrop mark {
  color: transparent;
  background: none;
  border-bottom: 2px wavy var(--cat-default);
  border-radius: 0;
  position: relative;
}

.editor-backdrop mark[data-category="ShuddhaTable"] { border-bottom-color: var(--cat-shuddha-table); }
.editor-backdrop mark[data-category="HrasvaDirgha"] { border-bottom-color: var(--cat-hrasva-dirgha); }
.editor-backdrop mark[data-category="Chandrabindu"] { border-bottom-color: var(--cat-chandrabindu); }
.editor-backdrop mark[data-category="ShaShaS"] { border-bottom-color: var(--cat-sha-sha-s); }
.editor-backdrop mark[data-category="BaVa"] { border-bottom-color: var(--cat-ba-va); }
.editor-backdrop mark[data-category="RiKri"] { border-bottom-color: var(--cat-ri-kri); }
.editor-backdrop mark[data-category="Halanta"] { border-bottom-color: var(--cat-halanta); }
.editor-backdrop mark[data-category="AadhiVriddhi"] { border-bottom-color: var(--cat-aadhi-vriddhi); }
.editor-backdrop mark[data-category="YaE"] { border-bottom-color: var(--cat-ya-e); }
.editor-backdrop mark[data-category="KshaChhya"] { border-bottom-color: var(--cat-ksha-chhya); }
.editor-backdrop mark[data-category="GyaGyan"] { border-bottom-color: var(--cat-gya-gyan); }
.editor-backdrop mark[data-category="Sandhi"] { border-bottom-color: var(--cat-sandhi); }
.editor-backdrop mark[data-category="Punctuation"] { border-bottom-color: var(--cat-punctuation); }

.editor-backdrop mark.mark-hidden { border-bottom-color: transparent; }

.editor-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.5rem 0;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.editor-status-left {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.grammar-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.grammar-toggle input {
  margin: 0;
}

.mode-note {
  display: inline-block;
  max-width: 22rem;
  line-height: 1.25;
  font-size: 0.76rem;
  color: #64748b;
}

.grammar-coverage {
  margin-top: 0.35rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.55rem;
  background: #f8fafc;
}

.grammar-coverage-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--color-text-secondary);
}

.grammar-coverage-label {
  font-family: var(--font-latin);
  font-size: 0.62rem;
  color: #475569;
}

.grammar-coverage-note {
  margin-top: 0.2rem;
  font-size: 0.76rem;
  color: var(--color-text-secondary);
}

.grammar-coverage-list {
  margin-top: 0.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.grammar-coverage-chip {
  font-family: var(--font-latin);
  font-size: 0.66rem;
  border-radius: 999px;
  border: 1px solid #cbd5e1;
  padding: 0.08rem 0.45rem;
  background: white;
  color: #334155;
}

.grammar-coverage-count {
  font-weight: 600;
  margin-left: 0.18rem;
}

.grammar-coverage-avg {
  margin-left: 0.2rem;
  font-size: 0.62rem;
  color: #64748b;
}

/* Diagnostics panel */
.checker-panel-col {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.diag-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
  gap: 0.5rem;
}

.diag-header {
  font-size: 1rem;
  font-weight: 600;
  padding-bottom: 0;
  border-bottom: none;
  margin-bottom: 0;
}

.diag-label {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-left: 0.3rem;
}

.diag-nav {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
}

.review-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0 0.25rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0.4rem;
}

.review-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0 0 0.6rem;
  flex-wrap: wrap;
}

.review-toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.review-progress {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  color: var(--color-text-secondary);
  min-width: 3rem;
}

.preview-panel {
  margin-bottom: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #f8fafc;
  padding: 0.85rem;
}

.preview-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.preview-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text);
}

.preview-note {
  font-size: 0.76rem;
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.preview-block {
  min-width: 0;
}

.preview-label {
  font-size: 0.74rem;
  font-weight: 700;
  color: #475569;
  margin-bottom: 0.35rem;
}

.preview-text {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-family: var(--font-devanagari);
  font-size: 0.92rem;
  line-height: 1.7;
  max-height: 14rem;
  overflow: auto;
}

.preview-text-corrected {
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.diagnostics-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.diag-empty {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  text-align: center;
  padding: 2rem 0;
}

.diag-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  cursor: pointer;
  transition: all var(--transition);
  border-left: 3px solid var(--cat-default);
}

.diag-card:hover { box-shadow: var(--shadow); }
.diag-card.active { border-color: var(--color-primary); box-shadow: var(--shadow-md); }

.diag-card[data-category="ShuddhaTable"] { border-left-color: var(--cat-shuddha-table); }
.diag-card[data-category="HrasvaDirgha"] { border-left-color: var(--cat-hrasva-dirgha); }
.diag-card[data-category="Chandrabindu"] { border-left-color: var(--cat-chandrabindu); }
.diag-card[data-category="ShaShaS"] { border-left-color: var(--cat-sha-sha-s); }
.diag-card[data-category="BaVa"] { border-left-color: var(--cat-ba-va); }
.diag-card[data-category="RiKri"] { border-left-color: var(--cat-ri-kri); }
.diag-card[data-category="Halanta"] { border-left-color: var(--cat-halanta); }
.diag-card[data-category="AadhiVriddhi"] { border-left-color: var(--cat-aadhi-vriddhi); }
.diag-card[data-category="YaE"] { border-left-color: var(--cat-ya-e); }
.diag-card[data-category="KshaChhya"] { border-left-color: var(--cat-ksha-chhya); }
.diag-card[data-category="GyaGyan"] { border-left-color: var(--cat-gya-gyan); }
.diag-card[data-category="Sandhi"] { border-left-color: var(--cat-sandhi); }
.diag-card[data-category="Punctuation"] { border-left-color: var(--cat-punctuation); }

.diag-card.hidden { display: none; }

.diag-badge {
  font-family: var(--font-latin);
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 600;
  color: white;
  margin-bottom: 0.35rem;
}

.diag-badge[data-category="ShuddhaTable"] { background: var(--cat-shuddha-table); }
.diag-badge[data-category="HrasvaDirgha"] { background: var(--cat-hrasva-dirgha); }
.diag-badge[data-category="Chandrabindu"] { background: var(--cat-chandrabindu); }
.diag-badge[data-category="ShaShaS"] { background: var(--cat-sha-sha-s); }
.diag-badge[data-category="BaVa"] { background: var(--cat-ba-va); }
.diag-badge[data-category="RiKri"] { background: var(--cat-ri-kri); }
.diag-badge[data-category="Halanta"] { background: var(--cat-halanta); }
.diag-badge[data-category="AadhiVriddhi"] { background: var(--cat-aadhi-vriddhi); }
.diag-badge[data-category="YaE"] { background: var(--cat-ya-e); }
.diag-badge[data-category="KshaChhya"] { background: var(--cat-ksha-chhya); }
.diag-badge[data-category="GyaGyan"] { background: var(--cat-gya-gyan); }
.diag-badge[data-category="Sandhi"] { background: var(--cat-sandhi); }
.diag-badge[data-category="Punctuation"] { background: var(--cat-punctuation); }
.diag-badge:not([data-category]) { background: var(--cat-default); }

.diag-meta {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.35rem;
}

.diag-kind-chip {
  font-family: var(--font-devanagari);
  font-size: 0.64rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.05rem 0.42rem;
  border: 1px solid transparent;
}

.diag-kind-error {
  color: #991b1b;
  background: #fee2e2;
  border-color: #fca5a5;
}

.diag-kind-suggestion {
  color: #92400e;
  background: #fef3c7;
  border-color: #fcd34d;
}

.diag-kind-variant {
  color: #1d4ed8;
  background: #dbeafe;
  border-color: #93c5fd;
}

.diag-confidence {
  margin-left: auto;
  font-family: var(--font-latin);
  font-size: 0.68rem;
  color: var(--color-text-secondary);
}

.diag-card.heuristic {
  background: #fffbeb;
  border-style: dashed;
}

.diag-guidance {
  display: none;
  font-size: 0.74rem;
  color: #475569;
  background: #f8fafc;
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.5rem;
  margin-bottom: 0.35rem;
}

.diag-card.active .diag-guidance {
  display: block;
}

.diag-correction {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.diag-incorrect {
  color: var(--color-error);
  text-decoration: line-through;
}

.diag-arrow { color: var(--color-text-secondary); margin: 0 0.3rem; }

.diag-correct {
  color: var(--color-success);
  font-weight: 600;
}

.diag-explanation {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.35rem;
  display: none;
}

.diag-card.active .diag-explanation { display: block; }

.diag-rule {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.35rem;
  display: none;
}

.diag-card.active .diag-rule { display: block; }

.diag-alternates {
  display: none;
  margin: 0.4rem 0 0.55rem;
  padding-top: 0.45rem;
  border-top: 1px dashed var(--color-border);
}

.diag-card.active .diag-alternates { display: block; }

.diag-alternates-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  margin-bottom: 0.35rem;
}

.diag-alt-item + .diag-alt-item {
  margin-top: 0.35rem;
}

.diag-alt-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  margin-bottom: 0.15rem;
}

.diag-alt-category,
.diag-alt-correction {
  font-family: var(--font-latin);
  font-size: 0.68rem;
  color: var(--color-text-secondary);
  background: var(--color-surface-alt);
  border-radius: 999px;
  padding: 0.08rem 0.45rem;
}

.diag-alt-rule {
  font-size: 0.68rem;
}

.diag-alt-text {
  font-size: 0.77rem;
  color: var(--color-text-secondary);
}

.diag-fix {
  display: none;
}

.diag-dismiss {
  display: none;
}

.diag-actions {
  display: none;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.diag-card.active .diag-actions { display: flex; }

.diag-card.active .diag-fix,
.diag-card.active .diag-dismiss { display: inline-flex; }

/* === Word Inspector === */
.inspector-container {
  animation: fadeIn 0.2s ease;
}

.panel-back-btn {
  margin-bottom: 0.75rem;
}

.inspector-word-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.inspector-word {
  font-size: 1.25rem;
  font-weight: 700;
}

.inspector-fix-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem 0;
}

.inspector-section {
  margin-bottom: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.inspector-section-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.inspector-section-label {
  font-family: var(--font-latin);
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-left: 0.2rem;
}

/* === Word Analysis (shared by inspector) === */
.analysis-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.analysis-word {
  font-size: 1.1rem;
  font-weight: 600;
}

.origin-badge {
  font-family: var(--font-devanagari);
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  color: white;
}

.origin-tatsam { background: #7c3aed; }
.origin-tadbhav { background: #0891b2; }
.origin-deshaj { background: #059669; }
.origin-aagantuk { background: #c2410c; }

.source-lang {
  font-family: var(--font-devanagari);
  font-size: 0.7rem;
  color: var(--color-muted);
  margin-left: 0.25rem;
}

.analysis-status {
  font-size: 0.8rem;
  font-weight: 500;
  margin-left: auto;
}

.analysis-status.correct { color: var(--color-success); }
.analysis-status.incorrect { color: var(--color-error); }

.analysis-correction {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  padding: 0.35rem 0;
}

.analysis-notes {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.analysis-note {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.35rem 0.5rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.analysis-note-rule {
  font-family: var(--font-latin);
  font-size: 0.65rem;
  color: var(--color-primary);
  font-weight: 500;
}

.analysis-note-text {
  color: var(--color-text-secondary);
}

/* === Morphology Decomposition === */
.morphology-display {
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin: 0.5rem 0;
  padding: 0.5rem 0;
}

.morpheme {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 0.3rem 0.6rem 0.2rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  line-height: 1.3;
}

.morpheme-prefix {
  background: #ede9fe;
  color: #6d28d9;
  border: 1px solid #c4b5fd;
}

.morpheme-root {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.morpheme-suffix {
  background: #ccfbf1;
  color: #0f766e;
  border: 1px solid #99f6e4;
}

.morpheme-case {
  background: #dbeafe;
  color: #1d4ed8;
  border: 1px solid #93c5fd;
}

.morpheme-plural {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
}

.morpheme-sep {
  align-self: center;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding-top: 0.1rem;
}

.morpheme-label {
  display: block;
  font-size: 0.55rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}

/* === Sandhi type badges (shared by inspector) === */
.sandhi-type-badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  color: white;
  background: var(--cat-default);
}

.sandhi-type-vowel { background: #059669; }
.sandhi-type-visarga { background: #3b82f6; }
.sandhi-type-consonant { background: #d97706; }

.sandhi-citation {
  font-family: var(--font-latin);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.sandhi-split-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.35rem;
}

.sandhi-split-parts {
  font-size: 1.05rem;
  font-weight: 600;
}

/* === Steps table (shared by inspector) === */
.steps-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.steps-label {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-left: 0.3rem;
}

.steps-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.steps-table th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 2px solid var(--color-border);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.steps-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.steps-table tr:last-child td { border-bottom: none; }

.steps-table .rule-cell {
  font-family: var(--font-latin);
  font-size: 0.75rem;
  color: var(--color-primary);
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* === Rules Reference === */
#view-reference.active {
  overflow-y: auto;
}

.reference-layout {
  max-width: 1100px;
  margin: 0 auto;
}

.reference-heading {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.reference-heading-label {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-left: 0.3rem;
}

.reference-intro {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}

.reference-context-banner {
  margin-bottom: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid #bfdbfe;
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #f8fbff 0%, #eef6ff 100%);
}

.reference-context-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  color: #1d4ed8;
  margin-bottom: 0.35rem;
}

.reference-context-main {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

.reference-context-wrong {
  color: var(--color-error);
  text-decoration: line-through;
  font-weight: 700;
}

.reference-context-arrow {
  color: var(--color-text-secondary);
}

.reference-context-right {
  color: var(--color-success);
  font-weight: 700;
}

.reference-context-rule {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  color: #475569;
  margin-bottom: 0.2rem;
}

.reference-context-text {
  font-size: 0.82rem;
  color: #334155;
  line-height: 1.6;
}

.reference-tools {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1rem;
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-bg);
  padding-top: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.reference-focus-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.reference-focus-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  color: #1d4ed8;
}

.reference-focus-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
}

.reference-search {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  font-family: var(--font-devanagari);
  font-size: 0.95rem;
  color: var(--color-text);
}

.reference-search:focus {
  outline: 2px solid rgba(59, 130, 246, 0.15);
  border-color: var(--color-primary);
}

.reference-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.reference-jump-chip {
  font-family: var(--font-devanagari);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.reference-jump-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: #eff6ff;
}

.reference-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 900px) {
  .reference-sections {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    align-items: start;
  }
}

.ref-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem 1.1rem;
  transition: box-shadow var(--transition), transform var(--transition);
  border-top: 4px solid var(--ref-accent, var(--color-border));
}

.ref-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.ref-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
  flex-wrap: wrap;
}

.ref-card-heading {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.ref-card-tools {
  flex-shrink: 0;
  display: none;
}

.ref-badge {
  font-family: var(--font-latin);
  display: inline-block;
  padding: 0.16rem 0.55rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 600;
  color: white;
}

.ref-code {
  font-family: var(--font-latin);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.ref-title {
  font-size: 1.02rem;
  font-weight: 700;
}

.ref-summary {
  font-size: 0.87rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0.9rem;
  max-width: 68ch;
}

.ref-targets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.55rem;
  margin-bottom: 0.95rem;
}

.ref-target {
  border: 1px solid #dbe3ee;
  background: linear-gradient(180deg, #f8fbff 0%, #f1f5f9 100%);
  border-radius: var(--radius-sm);
  min-height: 4rem;
  overflow: hidden;
}

.ref-target-kicker {
  font-family: var(--font-latin);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #64748b;
  margin-bottom: 0.18rem;
}

.ref-target-summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.6rem 0.75rem;
  cursor: pointer;
}

.ref-target-summary::-webkit-details-marker {
  display: none;
}

.ref-target-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.45;
  flex: 1;
}

.ref-target-body {
  padding: 0 0.75rem 0.7rem;
  border-top: 1px solid #dbe3ee;
  background: rgba(255, 255, 255, 0.6);
}

.ref-target-summary {
  gap: 0.4rem;
}

.ref-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-left: auto;
  background: var(--color-border);
}

.ref-status-implemented { background: var(--color-success); }
.ref-status-partial { background: #f59e0b; }
.ref-status-unknown { background: var(--color-border); opacity: 0.5; }

.ref-targets-kicker {
  font-family: var(--font-latin);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 0.4rem;
}

.ref-target-text {
  font-size: 0.8rem;
  color: #475569;
  line-height: 1.6;
  margin: 0.55rem 0 0.5rem;
}

.ref-target-examples-wrap {
  margin-top: 0.45rem;
}

.ref-target-examples-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: #475569;
  margin-bottom: 0.25rem;
}

.ref-target-examples {
  margin: 0;
  padding-left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.ref-target-examples li {
  font-size: 0.77rem;
  color: #334155;
  line-height: 1.5;
}

.ref-examples {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin-bottom: 0.9rem;
  background: #fcfdff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.ref-examples th {
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  background: #f8fafc;
}

.ref-examples td {
  padding: 0.42rem 0.6rem;
  border-bottom: 1px solid var(--color-border);
}

.ref-examples tbody tr:nth-child(even) td {
  background: #fafafa;
}

.ref-examples tr:last-child td { border-bottom: none; }

.ref-wrong {
  color: var(--color-error);
  text-decoration: line-through;
}

.ref-arrow {
  color: var(--color-text-secondary);
  text-align: center;
  width: 2rem;
}

.ref-right {
  color: var(--color-success);
  font-weight: 600;
}

.ref-subrules {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.ref-subrules li {
  font-family: var(--font-devanagari);
  font-size: 0.73rem;
  color: #475569;
  background: #f8fafc;
  padding: 0.28rem 0.55rem;
  border-radius: var(--radius-sm);
  border: 1px solid #e2e8f0;
}

/* Back button on reference view */
.ref-back-btn {
  margin-bottom: 0.75rem;
}

.ref-back-arrow {
  font-size: 1rem;
}

.ref-back-label {
  font-family: var(--font-latin);
  font-size: 0.65rem;
  color: var(--color-text-secondary);
  margin-left: 0.15rem;
}

/* Highlight animation when navigated to from a rule citation */
.ref-card-highlight {
  animation: refHighlight 1.5s ease;
}

@keyframes refHighlight {
  0% { box-shadow: 0 0 0 3px var(--color-primary); }
  100% { box-shadow: none; }
}

/* === Rule Tooltips === */
.rule-ref {
  position: relative;
  cursor: pointer;
  border-bottom: 1px dotted var(--color-primary);
}

.rule-ref:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.rule-ref:hover::after,
.rule-ref:focus-visible::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.35rem 0.6rem;
  background: var(--color-text);
  color: var(--color-surface);
  font-family: var(--font-devanagari);
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.4;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  z-index: 100;
  pointer-events: none;
  margin-bottom: 4px;
}

.rule-ref:hover::before,
.rule-ref:focus-visible::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--color-text);
  z-index: 100;
  pointer-events: none;
}

/* === Footer === */
.footer {
  text-align: center;
  padding: 1.25rem 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.footer-sub {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  margin-top: 0.15rem;
}


/* === Responsive === */

/* Tablet: narrow the fixed panel */
@media (max-width: 1024px) {
  .checker-layout {
    grid-template-columns: 1fr 280px;
  }
}

/* === Mobile diagnostic overlay card === */
.mobile-diag-overlay {
  display: none;
}

.mobile-inspector-overlay {
  display: none;
}

/* Mobile: stack to single column */
@media (max-width: 768px) {
  /* Switch from viewport-clipped layout to natural page scroll */
  body {
    height: auto;
    min-height: 100svh;
    overflow-y: auto;
  }

  .main {
    overflow: visible;
  }

  .view.active {
    overflow: visible;
    flex: none;
  }

  /* Reference view: let page scroll naturally on mobile */
  #view-reference.active {
    overflow-y: visible;
  }

  .checker-layout {
    grid-template-columns: 1fr;
    flex: none;
  }

  .header-inner {
    flex-direction: column;
    gap: 0.5rem;
  }

  .editor-container {
    min-height: 250px;
  }

  /* Cap diagnostics panel height so editor stays visible above */
  .checker-panel-col {
    max-height: 45vh;
    overflow-y: auto;
  }

  .preview-grid {
    grid-template-columns: 1fr;
  }

  /* Show inline overlay instead */
  .mobile-diag-overlay {
    display: none; /* shown via JS when tapping an error */
    position: absolute;
    bottom: 0.5rem;
    left: 0.5rem;
    right: 0.5rem;
    z-index: 20;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 0.75rem;
    animation: fadeIn 0.15s ease;
  }

  .mobile-diag-overlay.visible {
    display: block;
  }

  .mobile-inspector-overlay {
    display: none; /* shown via JS when tapping a non-diagnostic word */
    margin-top: 0.6rem;
    background: color-mix(in srgb, var(--color-surface) 96%, white 4%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 0.75rem;
    animation: fadeIn 0.15s ease;
    max-height: min(44svh, 26rem);
    overflow: auto;
    -webkit-overflow-scrolling: touch;
  }

  .mobile-inspector-overlay.visible {
    display: block;
  }

  .inspector-container-mobile {
    max-height: 100%;
    overflow: auto;
    padding-right: 0.1rem;
  }

  .inspector-container-mobile .panel-back-btn {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--color-surface);
  }

  .mobile-diag-overlay .diag-correction {
    font-size: 1.05rem;
    margin-bottom: 0.3rem;
  }

  .mobile-diag-overlay .diag-explanation {
    display: block;
    margin-bottom: 0.3rem;
  }

  .mobile-diag-overlay .diag-rule {
    display: block;
    margin-bottom: 0.4rem;
  }

  .mobile-diag-overlay .diag-alternates {
    display: block;
    margin-top: 0.45rem;
    margin-bottom: 0.45rem;
  }

  .mobile-diag-overlay .mobile-diag-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
  }

  .mobile-diag-progress {
    font-family: var(--font-latin);
    font-size: 0.68rem;
    color: var(--color-text-secondary);
    margin-left: auto;
  }

  .mobile-diag-dismiss {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.2rem;
    line-height: 1;
  }

  .editor-status {
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .editor-status-left {
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .mode-note {
    max-width: 100%;
  }

  .inspector-word-header { flex-direction: column; align-items: flex-start; }
  .inspector-fix-section { flex-direction: column; align-items: flex-start; }

  .ref-card-header { flex-direction: column; align-items: flex-start; }
  .ref-examples { font-size: 0.8rem; }
  .ref-subrules { flex-direction: row; }

  /* Tables: horizontal scroll on narrow screens */
  .steps-table,
  .ref-examples {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .rule-ref:hover::after { white-space: normal; max-width: 250px; left: 0; transform: none; }
  .rule-ref:hover::before { left: 1rem; transform: none; }
}

/* Small phones */
@media (max-width: 480px) {
  .header-title {
    font-size: 1.35rem;
  }

  .header-subtitle {
    font-size: 0.75rem;
  }

  .header-build {
    display: none;
  }

  .main {
    padding: 0.75rem 0.5rem;
  }

  .editor-container {
    min-height: 200px;
  }

  .editor-backdrop,
  .editor-input {
    padding: 0.75rem;
    font-size: 0.95rem;
  }

  .grammar-toggle {
    font-size: 0.72rem;
  }

  .category-pill {
    font-size: 0.62rem;
    padding: 0.15rem 0.45rem;
  }

  .diag-card {
    padding: 0.5rem;
  }

  .ref-card {
    padding: 0.75rem;
  }

  .sandhi-split-row {
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0.5rem 0.75rem;
  }
}