:root { --gap: 12px; --radius: 12px; --border: #c9c9c9; }

/* Base layout & typography */
* { box-sizing: border-box; }
body { font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Arial; margin: 24px; }
h1 { margin: 0 0 8px; font-size: 20px; }
.bar, form { max-width: 1000px; }
.bar {
  display: grid; gap: var(--gap);
  grid-template-columns: 1fr auto;
  align-items: center; margin-bottom: var(--gap);
  position: sticky; top: 0; background: #fff; padding: 8px 0; z-index: 5;
}
.row { display: flex; gap: var(--gap); flex-wrap: wrap; align-items: center; }
select, input[type="text"] {
  padding: 8px 10px; border: 1px solid var(--border);
  border-radius: var(--radius); min-width: 240px;
}

/* Editor */
textarea {
  width: 100%;
  min-height: 70vh;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font: 15px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* Buttons */
button {
  padding: 10px 14px;
  border: 1px solid #888;
  border-radius: var(--radius);
  cursor: pointer;
  background: #f4f4f4;
}
button.primary { background: #e8f0fe; border-color: #5a7; }

/* Mobile tweaks */
@media (max-width: 640px) {
  body { margin: 14px; font-size: 16px; }
  .bar { grid-template-columns: 1fr; gap: 10px; }
  .row { gap: 10px; }
  select, input[type="text"] { width: 100%; min-width: 0; }
  button { width: 100%; padding: 12px 16px; font-size: 16px; }
  textarea { min-height: calc(100dvh - 220px); } /* fill under header/controls */
}

@media (prefers-color-scheme: dark) {
  body { background:#0b0b0c; color:#e6e6e6; }
  .bar { background:#0b0b0c; }
  textarea { background:#111215; color:#e6e6e6; border-color:#2c2f36; }
  select, input[type="text"] { background:#15161a; color:#e6e6e6; border-color:#2c2f36; }
  button { background:#1a1b1f; color:#e6e6e6; border-color:#2c2f36; }
  button.primary { background:#2d3e2d; color:#d6ffd6; border-color:#5a7; } /* ✅ add this */
  .hint { color:#a7aab0; }
}