:root {
  color-scheme: light dark;
  --bg: #f7f7f8;
  --fg: #1a1a1a;
  --muted: #5b5b66;
  --border: #d6d6dc;
  --accent: #2451b2;
  --accent-fg: #fff;
  --card: #fff;
  --warn: #b45309;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14141a;
    --fg: #ececf1;
    --muted: #9a9aa8;
    --border: #2c2c36;
    --accent: #6a8cff;
    --accent-fg: #0a0a10;
    --card: #1c1c24;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}
header h1 {
  margin: 0 0 .25rem;
  font-size: 1.85rem;
  letter-spacing: -0.01em;
}
.lede { color: var(--muted); margin: 0 0 2rem; }
section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}
section h2 { margin: 0 0 1rem; font-size: 1.1rem; }
form label {
  display: block;
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: .35rem;
}
input[type="file"] {
  display: block;
  width: 100%;
  padding: .65rem;
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: var(--fg);
  margin-bottom: 1rem;
}
button {
  appearance: none;
  border: 0;
  background: var(--accent);
  color: var(--accent-fg);
  padding: .6rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}
button[disabled] { opacity: .6; cursor: not-allowed; }
#status { font-size: .9rem; color: var(--muted); margin: .6rem 0 0; min-height: 1.2em; }
#status.error { color: var(--warn); }
dl { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1rem; margin: 0 0 1rem; }
dt { color: var(--muted); }
dd { margin: 0; font-variant-numeric: tabular-nums; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .45rem .55rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
#fields-wrap { max-height: 320px; overflow: auto; border: 1px solid var(--border); border-radius: 8px; }
footer { color: var(--muted); font-size: .8rem; text-align: center; margin-top: 2rem; }