:root {
  --bg: #f6f8fa;
  --fg: #1f2328;
  --muted: #59636e;
  --card: #ffffff;
  --border: #d1d9e0;
  --accent: #1f6feb;
  --accent-fg: #ffffff;
  --sev-critical: #ffcdcd;
  --sev-high: #ffe4c8;
  --sev-medium: #fff9c4;
  --sev-low: #e2f0ff;
  --sev-info: #ebebeb;
  --sev-text: #1f2328;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --card: #161b22;
    --border: #30363d;
    --accent: #388bfd;
    --sev-critical: #5c2224;
    --sev-high: #5a3a1a;
    --sev-medium: #54491a;
    --sev-low: #1d3a5c;
    --sev-info: #30363d;
    --sev-text: #e6edf3;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}
.wrap { max-width: 1150px; margin: 0 auto; padding: 0 16px; }
code, kbd, pre { font-family: ui-monospace, SFMono-Regular, "Cascadia Mono", Consolas, monospace; }

header { padding: 28px 0 4px; }
h1 { margin: 0 0 4px; font-size: 1.6rem; }
.tagline { margin: 0 0 16px; color: var(--muted); max-width: 62em; }

#dropzone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  background: var(--card);
  padding: 28px 20px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
#dropzone:hover, #dropzone:focus-visible, #dropzone.drag {
  border-color: var(--accent);
  outline: none;
}
.dz-inner { display: flex; gap: 16px; align-items: center; justify-content: center; text-align: left; }
.dz-icon { font-size: 2.2rem; }
.dz-sub { color: var(--muted); font-size: 0.9rem; margin-top: 2px; }

.howto { margin: 14px 0; color: var(--muted); font-size: 0.95rem; }
.howto summary { cursor: pointer; color: var(--fg); }
.howto a { color: var(--accent); }

#status {
  margin: 14px 0;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--card);
  border: 1px solid var(--border);
}
#status.error { border-color: #d1242f; color: #d1242f; }

#results { margin-top: 16px; }
.summary { margin-bottom: 10px; color: var(--muted); }

.results-grid { display: grid; grid-template-rows: auto auto; gap: 12px; }
.table-scroll {
  overflow: auto;
  max-height: 46vh;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
}
table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
thead th {
  position: sticky; top: 0;
  background: var(--card);
  text-align: left;
  padding: 8px 10px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
tbody td { padding: 6px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
tbody tr { cursor: pointer; }
tbody tr.sev { color: var(--sev-text); }
tbody tr.sev-critical { background: var(--sev-critical); }
tbody tr.sev-high { background: var(--sev-high); }
tbody tr.sev-medium { background: var(--sev-medium); }
tbody tr.sev-low { background: var(--sev-low); }
tbody tr.sev-info { background: var(--sev-info); }
tbody tr.selected { outline: 2px solid var(--accent); outline-offset: -2px; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
td.nowrap { white-space: nowrap; }

.detail {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  min-height: 180px;
  max-height: 44vh;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.86rem;
}

.actions { margin: 14px 0; display: flex; gap: 10px; flex-wrap: wrap; }
button {
  font: inherit;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); }
button:hover { filter: brightness(1.08); }

footer { color: var(--muted); font-size: 0.85rem; padding: 18px 16px 30px; }
footer a { color: var(--accent); }

@media (max-width: 700px) {
  .dz-inner { flex-direction: column; text-align: center; }
}