:root {
  --bg: #f6f5f1; --surface: #ffffff; --text: #1d1d1b; --muted: #6b6a64;
  --line: #dddbd3; --accent: #1f5f8b; --accent-text: #ffffff; --low: #b3261e; --low-bg: #fbe9e7;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161615; --surface: #20201e; --text: #ecebe6; --muted: #a3a29b;
    --line: #3a3935; --accent: #6fb0dd; --accent-text: #0e1a22; --low: #ff8a80; --low-bg: #3a1f1c;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 1100px; margin: 0 auto; padding: 40px 16px 64px; }
h1 { font-size: 1.9rem; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; margin: 0; }
.lead { margin: 0 0 6px; max-width: 60ch; }
.privacy { margin: 0 0 24px; color: var(--muted); font-size: 0.92rem; max-width: 60ch; }
.drop { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 36px 16px;
  border: 2px dashed var(--line); border-radius: 12px; background: var(--surface);
  cursor: pointer; text-align: center; transition: border-color .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--accent); }
.drop input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.drop:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.drop-main { font-weight: 600; }
.drop-sub { color: var(--muted); font-size: 0.9rem; }
.error { color: var(--low); font-weight: 600; }
#result { margin-top: 32px; }
.bar { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: end; justify-content: space-between; margin-bottom: 8px; }
.muted { color: var(--muted); margin: 2px 0 0; }
.small { font-size: 0.88rem; }
button { font: inherit; border-radius: 8px; border: 1px solid var(--line); background: var(--surface);
  color: var(--text); padding: 4px 10px; cursor: pointer; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); padding: 10px 18px; font-weight: 600; }
.scroll { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
table { border-collapse: collapse; font-size: 0.88rem; width: 100%; }
th, td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: center; white-space: nowrap; }
th { font-weight: 600; vertical-align: bottom; }
th small { display: block; font-weight: 400; color: var(--muted); font-size: 0.75rem; }
td.name, th.name { text-align: left; position: sticky; left: 0; background: var(--surface); }
tr:last-child td { border-bottom: 0; }
tr.avg td { color: var(--muted); font-style: italic; }
td.low { color: var(--low); background: var(--low-bg); font-weight: 600; }