:root {
  --bg: #0f172a;
  --card: #1e293b;
  --ink: #e2e8f0;
  --muted: #94a3b8;
  --accent: #22d3ee;
  --ok: #4ade80;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px; border-bottom: 1px solid #334155;
}
.logo { font-weight: 800; letter-spacing: .5px; color: var(--accent); font-size: 1.1rem; }
.tag { color: var(--muted); font-size: .9rem; }
main { max-width: 960px; margin: 0 auto; padding: 24px; }
.hero { text-align: center; padding: 24px 0 16px; }
.hero h1 { font-size: 2rem; margin: 0 0 12px; }
.sub { color: var(--muted); max-width: 720px; margin: 0 auto 12px; }
.score-badge {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--card); border: 1px solid #334155; color: var(--muted); font-size: .85rem;
}
.score { color: var(--accent); }
.card {
  background: var(--card); border: 1px solid #334155; border-radius: 12px;
  padding: 20px; margin: 16px 0;
}
.card h2 { margin-top: 0; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .grid { grid-template-columns: 1fr; } }
.upload input[type=file], .upload textarea { width: 100%; margin: 8px 0; }
.upload textarea {
  background: #0f172a; color: var(--ink); border: 1px solid #334155;
  border-radius: 8px; padding: 10px; font-family: ui-monospace, Menlo, monospace; font-size: .8rem;
}
.hint { color: var(--muted); font-size: .85rem; }
button, .btn {
  background: var(--accent); color: #082f49; font-weight: 700; border: 0;
  border-radius: 8px; padding: 10px 18px; cursor: pointer; font-size: .95rem; text-decoration: none;
}
button:hover, .btn:hover { filter: brightness(1.08); }
.error { color: #fca5a5; }
table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid #334155; vertical-align: top; }
th { color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .5px; }
.sev-blocker td:first-child { border-left: 4px solid #ef4444; }
.sev-major td:first-child { border-left: 4px solid #f97316; }
.sev-minor td:first-child { border-left: 4px solid #eab308; }
.sev-opportunity td:first-child { border-left: 4px solid #38bdf8; }
.mono { font-family: ui-monospace, Menlo, monospace; font-size: .8rem; }
.small { font-size: .82rem; color: var(--muted); }
.note { color: #fbbf24; font-size: .75rem; }
.actions { margin: 16px 0; text-align: center; }
footer { color: var(--muted); text-align: center; font-size: .8rem; padding: 24px 0; }