:root {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: #111827;
}

body {
  margin: 0;
  padding: 16px;
  background: #f4f6fa;
}

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

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.panel {
  background: #fff;
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 3px 14px rgba(17, 24, 39, 0.08);
}

textarea {
  width: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  border: 1px solid #cfd3db;
  border-radius: 8px;
  padding: 8px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
}

input,
select,
button {
  padding: 6px 10px;
  border: 1px solid #cfd3db;
  border-radius: 8px;
}

button {
  background: #111827;
  color: #fff;
  cursor: pointer;
}

button:hover {
  background: #0b1220;
}

#previewWrap {
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  min-height: 220px;
  background: #fff;
  padding: 8px;
}

#previewFrame {
  width: 100%;
  min-height: 200px;
  border: none;
}

#output {
  white-space: pre-wrap;
  max-height: 220px;
  overflow: auto;
  background: #0f172a;
  color: #d1d5db;
  padding: 12px;
  border-radius: 10px;
}