:root {
  --canvas: #f4f6fa;
  --surface: #ffffff;
  --fg: #11182a;
  --fg-muted: #5a6478;
  --line: #d9dfea;
  --brand: #1f4fd8;
  --brand-fg: #ffffff;
  --ok: #176334;
  --ok-bg: #e8f6ed;
  --warn: #8f5200;
  --warn-bg: #fdf3e3;
  --bad: #a3231f;
  --bad-bg: #fcecec;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0a0f17;
    --surface: #141b27;
    --fg: #e8ecf4;
    --fg-muted: #9aa5ba;
    --line: #27303f;
    --brand: #6f9bff;
    --brand-fg: #0a0f17;
    --ok: #74d39a;
    --ok-bg: #12241a;
    --warn: #f0bd6a;
    --warn-bg: #2a2114;
    --bad: #f08b86;
    --bad-bg: #2a1616;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 32px 16px 64px;
  background: var(--canvas);
  color: var(--fg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-variant-numeric: tabular-nums;
}
main { max-width: 760px; margin: 0 auto; }
h1 { font-size: 30px; margin: 0 0 6px; letter-spacing: -0.02em; }
h2 { font-size: 17px; margin: 0 0 10px; }
.lead { color: var(--fg-muted); margin: 0 0 28px; }
form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  gap: 16px;
}
.drop {
  display: grid;
  gap: 4px;
  justify-items: center;
  text-align: center;
  padding: 30px 16px;
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}
.drop.over, .drop:hover { border-color: var(--brand); }
.drop input[type=file] {
  position: absolute; width: 1px; height: 1px;
  opacity: 0; overflow: hidden; clip: rect(0 0 0 0);
}
.drop-text { font-weight: 600; }
.drop-hint, .note { color: var(--fg-muted); font-size: 14px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; }
.check input { margin-top: 3px; width: 18px; height: 18px; flex: none; }
.check em { color: var(--fg-muted); font-style: normal; }
button {
  font: inherit;
  font-weight: 600;
  padding: 12px 18px;
  min-height: 44px;
  border: 0;
  border-radius: 10px;
  background: var(--brand);
  color: var(--brand-fg);
  cursor: pointer;
}
button:disabled { opacity: .55; cursor: progress; }
.status { margin: 20px 0 0; padding: 12px 14px; border-radius: 10px; }
.status.work { background: var(--surface); border: 1px solid var(--line); color: var(--fg-muted); }
.status.bad { background: var(--bad-bg); border: 1px solid var(--bad); color: var(--bad); }
section#result { margin-top: 20px; display: grid; gap: 16px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}
.card.ok { border-color: var(--ok); background: var(--ok-bg); }
.card.warn { border-color: var(--warn); background: var(--warn-bg); }
.card.ok h2 { color: var(--ok); }
.card.warn h2 { color: var(--warn); }
.cols { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 620px) { .cols { grid-template-columns: 1fr 1fr; } }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--fg-muted); font-weight: 600; width: 44%; }
td { overflow-wrap: anywhere; }
.gone td { color: var(--fg-muted); text-decoration: line-through; }
ul { margin: 0; padding-left: 20px; }
li { margin: 2px 0; }
footer { margin-top: 32px; color: var(--fg-muted); font-size: 14px; }
.dl { display: inline-block; margin-top: 4px; text-decoration: none; }