.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr) 320px;
  gap: 0;
  min-height: 0;
}

.panel {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow-y: auto;
}

.section-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text3);
  margin-bottom: 10px;
}

.hint-text {
  font-size: 12px;
  color: var(--text3);
  margin-top: 8px;
  line-height: 1.65;
}

.hint-text--warn {
  color: #ef4444;
  font-weight: 600;
}

section {
  padding: 14px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.select,
.text-input,
.number-input {
  width: 100%;
  padding: 10px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.text-input,
.number-input {
  font-family: var(--mono);
}

.select:focus,
.text-input:focus,
.number-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field > span {
  font-size: 12px;
  color: var(--text2);
  font-weight: 500;
}

.btn-primary,
.btn-secondary,
.mini-btn {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  font-weight: 600;
}

.btn-primary {
  width: 100%;
  padding: 11px 14px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(0.98);
}

.btn-secondary,
.mini-btn {
  padding: 8px 10px;
  background: var(--surface-muted);
  color: var(--text2);
  font-weight: 500;
  font-size: 12px;
}

.btn-secondary:hover,
.mini-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.btn-row .btn-secondary {
  flex: 1;
}

.preview-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 22px 22px;
  gap: 16px;
  background: #eef0f6;
  position: relative;
  overflow: visible;
}

.preview-card {
  width: min(560px, 100%);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow-lg);
  padding: 18px 18px;
  position: sticky;
  top: 18px;
}

.preview-title {
  font-size: 12px;
  color: var(--text3);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.preview-number {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: clamp(22px, 4vw, 34px);
  letter-spacing: 0.05em;
  color: #111827;
}

.preview-list {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  color: #111827;
  counter-reset: previewRow;
}

.preview-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  counter-increment: previewRow;
}

.preview-row::before {
  content: counter(previewRow, decimal-leading-zero);
  flex-shrink: 0;
  color: var(--text3);
  font-size: 12px;
  user-select: none;
  -webkit-user-select: none;
}

.preview-row-num {
  flex: 1;
  min-width: 0;
  text-align: right;
  letter-spacing: 0.04em;
}

.preview-meta {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--text3);
  font-size: 12px;
}

.meta-chip {
  border: 1px solid var(--border);
  background: #fff;
  padding: 6px 10px;
  border-radius: 999px;
  font-family: var(--mono);
}

.output-panel {
  background: var(--surface);
  border-left: 1px solid var(--border);
  padding: 22px 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.empty-output {
  padding: 14px 12px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface-muted);
  color: var(--text3);
  font-size: 13px;
  text-align: center;
}

.out-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.out-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-muted);
}

.out-left {
  min-width: 0;
}

.out-number {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  letter-spacing: 0.04em;
}

.out-sub {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text3);
}

.out-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.message {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-muted);
  color: var(--text3);
  font-size: 12px;
  line-height: 1.6;
}

.message.is-warn {
  border-color: rgba(239, 68, 68, 0.35);
  background: rgba(239, 68, 68, 0.08);
  color: #b91c1c;
  font-weight: 600;
}

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }
  .panel {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .output-panel {
    border-left: none;
    border-top: 1px solid var(--border);
    max-height: 320px;
  }
  .preview-area {
    min-height: 260px;
  }
}