:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --border: #d9dce1;
  --text: #1c2027;
  --muted: #6b7280;
  --accent: #7a1f2b;
  --accent-dark: #5c1620;
  --accent-tint: #f3e5e7;
  --danger: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --panel: #1e2128;
    --border: #33373f;
    --text: #e7e9ee;
    --muted: #9aa0ab;
    --accent: #c65b66;
    --accent-dark: #e08790;
    --accent-tint: #3a2226;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.file-protocol-warning {
  background: #fff3cd;
  color: #664d03;
  border-bottom: 1px solid #ffda6a;
  padding: 10px 20px;
  font-size: 0.85rem;
  line-height: 1.5;
}
.file-protocol-warning code {
  background: rgba(0,0,0,0.08);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.9em;
}

.topbar-title h1 {
  font-size: 1.2rem;
  margin: 0;
}
.subtitle {
  font-size: 0.75rem;
  color: var(--muted);
}

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

.field-inline {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
}
.field-inline select {
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  min-height: 40px;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover { border-color: var(--accent); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-dark); }
.btn-secondary { background: var(--bg); }
.btn-ghost { background: transparent; }
.btn-small { padding: 4px 10px; font-size: 0.78rem; }

.layout {
  display: grid;
  grid-template-columns: minmax(320px, 480px) 1fr;
  gap: 20px;
  padding: 20px;
  align-items: start;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 12px; gap: 14px; }
  .form-pane { max-height: none; overflow-y: visible; padding-right: 0; }
  .preview-pane { position: static; top: auto; }
  .letter-preview { max-height: 60vh; padding: 24px 20px; }
  .topbar { padding: 12px 14px; }
  .topbar-actions { width: 100%; justify-content: flex-start; }
  .field-inline select { flex: 1; }
}

.form-pane {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding-right: 6px;
}

.form-section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
.form-section h2 {
  font-size: 0.95rem;
  margin: 0 0 10px 0;
  color: var(--accent);
}
.hint { font-weight: normal; color: var(--muted); font-size: 0.75rem; }

.howto-details {
  margin: 8px 0 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  background: var(--accent-tint);
}
.howto-details summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: bold;
  color: var(--accent);
}
.howto-body { font-size: 0.85rem; margin-top: 8px; }
.howto-body ol { padding-left: 20px; margin: 8px 0; }
.howto-body li { margin-bottom: 8px; }
.howto-body em { font-style: italic; }

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
  font-size: 0.82rem;
}
.field span { color: var(--muted); }
.field em { font-style: normal; color: var(--muted); opacity: 0.8; }
.field input, .field select, .field textarea {
  padding: 9px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  /* iOS Safari/Chrome auto-zoom the page on focus if a field's font-size is under 16px */
  font-size: 16px;
  font-family: inherit;
  min-height: 40px;
}
.field textarea { resize: vertical; min-height: 60px; }
.field-row { display: flex; gap: 10px; }
.field-row .field { flex: 1; }

.checkbox-field {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.85rem;
  margin-bottom: 10px;
  cursor: pointer;
  min-height: 24px;
}
.checkbox-field input {
  margin-top: 2px;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  accent-color: var(--accent);
}

.checkbox-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 10px;
}

.timeline-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
  align-items: flex-start;
}
.timeline-row input[type="date"] { width: 150px; flex-shrink: 0; }
.timeline-row input[type="text"] { flex: 1; }
.timeline-row button {
  border: none;
  background: transparent;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.3rem;
  padding: 4px 10px;
  min-height: 40px;
  min-width: 40px;
}

.extract-results {
  margin-top: 10px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}
.extract-empty { font-size: 0.82rem; color: var(--muted); }
.extract-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border);
}
.extract-check {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  min-width: 130px;
  cursor: pointer;
}
.extract-check input { width: 18px; height: 18px; accent-color: var(--accent); }
.extract-value {
  flex: 1;
  min-width: 140px;
  padding: 8px 9px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}
.extract-context {
  flex-basis: 100%;
  font-size: 0.72rem;
  color: var(--muted);
  font-style: italic;
}
.extract-suggestion {
  margin-top: 10px;
  padding: 10px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent-tint);
}
.extract-suggestion-label { font-size: 0.78rem; font-weight: bold; margin-bottom: 4px; }
.extract-suggestion-text { font-size: 0.85rem; margin-bottom: 6px; }

.guaranteed-row-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0 14px;
}
.guaranteed-row-btn { white-space: nowrap; }

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0 14px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-tint);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 4px 6px 4px 12px;
  font-size: 0.82rem;
}
.chip button {
  background: transparent;
  border: none;
  color: var(--accent);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
}
.ground-match {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border);
}
.ground-match:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.ground-match ul { margin: 4px 0; padding-left: 20px; }

.preview-pane {
  position: sticky;
  top: 90px;
}
.preview-toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.letter-preview {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 40px 48px;
  max-height: calc(100vh - 170px);
  overflow-y: auto;
  font-family: "Times New Roman", Georgia, serif;
  font-size: 15px;
  line-height: 1.55;
  color: #111;
  background: #fff;
}
@media (prefers-color-scheme: dark) {
  .letter-preview { color: #111; }
}

.letter-preview p { margin: 0 0 14px 0; }
.letter-preview .subject { font-weight: bold; text-decoration: underline; }
.letter-preview ul { margin: 0 0 14px 0; padding-left: 22px; }
.letter-preview li { margin-bottom: 6px; }
.letter-preview .block-heading { font-weight: bold; margin-top: 18px; }
.letter-preview .signature-block { margin-top: 30px; }

.app-footer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted);
  padding: 16px;
}

@media print {
  .topbar, .form-pane, .preview-toolbar, .app-footer, .file-protocol-warning { display: none !important; }
  .layout { display: block; padding: 0; }
  .preview-pane { position: static; }
  .letter-preview {
    border: none;
    max-height: none;
    overflow: visible;
    padding: 0.5in;
    box-shadow: none;
  }
}