:root {
  --bg: #0f1115;
  --panel: #171a21;
  --fg: #e8ecf1;
  --muted: #9aa3b2;
  --border: #2a2f3a;
  --accent: #4f8cff;
  --info: #5aa3ff;
  --low: #5ecf7a;
  --medium: #f5c451;
  --high: #f07f3d;
  --critical: #ef4444;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2rem; border-bottom: 1px solid var(--border);
}
.site-header .brand { font-weight: 700; font-size: 1.125rem; color: var(--fg); }
.site-header nav a { margin-left: 1.5rem; color: var(--muted); }

main { max-width: 64rem; margin: 0 auto; padding: 2rem 1.5rem 4rem; }

.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 2rem; color: var(--muted); font-size: 0.875rem; text-align: center; }

h1 { font-size: 2.25rem; line-height: 1.2; margin: 0 0 0.5rem; }
.subhead { color: var(--muted); margin: 0 0 2rem; font-size: 1.125rem; }

.paste-box {
  width: 100%; min-height: 12rem; padding: 1rem;
  background: var(--panel); color: var(--fg);
  border: 1px solid var(--border); border-radius: 8px;
  font-family: var(--mono); font-size: 0.875rem;
  resize: vertical;
}
.paste-box::placeholder { color: var(--muted); }
.paste-box:focus { outline: 2px solid var(--accent); outline-offset: 2px; }

.cta-row { display: flex; align-items: center; gap: 1rem; margin-top: 1rem; flex-wrap: wrap; }
.btn {
  background: var(--accent); color: white; border: 0;
  padding: 0.75rem 1.5rem; border-radius: 6px; font-size: 1rem; font-weight: 600;
  cursor: pointer;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--border); }

.disclaimer { color: var(--muted); font-size: 0.875rem; margin-top: 0.5rem; }

.error-banner {
  background: rgba(239, 68, 68, 0.1); border: 1px solid var(--critical);
  color: var(--critical); padding: 0.75rem 1rem; border-radius: 6px;
  margin-bottom: 1rem;
}

.result { margin-top: 2.5rem; }
.verdict-header {
  display: flex; align-items: center; gap: 1.5rem;
  padding: 1.25rem; background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px;
}
.traffic-light { width: 3.5rem; height: 3.5rem; border-radius: 50%; flex: 0 0 auto; }
.traffic-light.info { background: var(--info); }
.traffic-light.low { background: var(--low); }
.traffic-light.medium { background: var(--medium); }
.traffic-light.high { background: var(--high); }
.traffic-light.critical { background: var(--critical); }
.verdict-label { font-size: 1.5rem; font-weight: 700; margin: 0; }
.verdict-meta { color: var(--muted); margin: 0.25rem 0 0; font-size: 0.875rem; }
.score-circle {
  margin-left: auto; width: 4rem; height: 4rem; border: 3px solid var(--border); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; font-weight: 700; font-variant-numeric: tabular-nums;
}

section.why { margin-top: 1.5rem; }
section.why h2 { font-size: 1.125rem; margin: 0 0 0.75rem; }
.signal {
  padding: 0.75rem 1rem; background: var(--panel); border: 1px solid var(--border);
  border-radius: 6px; margin-bottom: 0.5rem;
}
.signal .sig-id { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.signal .sig-evidence { margin: 0.25rem 0 0; font-size: 0.9375rem; }
.severity-dot { display: inline-block; width: 0.5rem; height: 0.5rem; border-radius: 50%; margin-right: 0.375rem; vertical-align: middle; }
.severity-dot.info, .severity-dot.low { background: var(--low); }
.severity-dot.medium { background: var(--medium); }
.severity-dot.high, .severity-dot.critical { background: var(--critical); }

details.raw { margin-top: 1.5rem; }
details.raw summary { cursor: pointer; color: var(--muted); font-size: 0.875rem; }
details.raw pre { background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 1rem; overflow: auto; font-size: 0.8125rem; }

.loading { color: var(--muted); font-style: italic; }

@media (max-width: 640px) {
  main { padding: 1.25rem 1rem; }
  h1 { font-size: 1.75rem; }
  .site-header { padding: 1rem; }
  .site-header nav a { margin-left: 1rem; }
}