h1 {
  margin-top: 32px;
  margin-bottom: 8px;
  font-size: 2rem;
}

.lede {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 28px;
  max-width: 60ch;
}

.tool {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.format-row {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 16px;
}

.format-row label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.format-row select {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
}

.btn {
  font: inherit;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
}

.btn:hover { border-color: var(--muted); }

.btn--swap {
  align-self: flex-end;
  color: var(--accent);
  border-color: var(--accent);
}

.btn--small {
  padding: 3px 10px;
  font-size: 0.8rem;
  margin-left: 8px;
}

.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.col-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  display: flex;
  align-items: center;
  margin-bottom: 6px;
}

textarea {
  width: 100%;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85rem;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  resize: vertical;
  min-height: 200px;
}

textarea[readonly] { color: var(--ink); background: var(--panel); }

.hint {
  color: #c0392b;
  font-size: 0.85rem;
  margin: 0 0 16px;
}

.preview-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.preview-head h2 { font-size: 1.1rem; margin: 0; }

.row-count { color: var(--muted); font-size: 0.85rem; }

.preview-hint {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 4px 0 12px;
}

.preview {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: auto;
  max-height: 360px;
}

.preview table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
}

.preview th, .preview td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.preview th {
  background: var(--bg);
  cursor: pointer;
  user-select: none;
  position: sticky;
  top: 0;
}

.preview th:hover { color: var(--accent); }

.preview tbody tr:last-child td { border-bottom: none; }

.table-empty {
  color: var(--muted);
  padding: 16px;
  margin: 0;
  font-size: 0.9rem;
}

.faq { margin-top: 48px; max-width: 70ch; }

.faq h2 { font-size: 1.3rem; margin-top: 32px; }

.faq code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.85em;
  background: var(--bg);
  padding: 1px 5px;
  border-radius: 4px;
}

details {
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
}

details summary {
  cursor: pointer;
  font-weight: 600;
}

@media (max-width: 640px) {
  .columns { grid-template-columns: 1fr; }
  .format-row { flex-wrap: wrap; }
}