:root {
  --bg: #fafaf7;
  --fg: #1c1c1c;
  --muted: #666;
  --border: #d9d9d4;
  --panel: #fff;
  --accent: #0366d6;
  --sev-error: #d73a49;
  --sev-warning: #b08800;
  --sev-information: #0366d6;
  --sev-hint: #6a737d;
  --mark-error: #ffd0d0;
  --mark-warning: #fff0b3;
  --mark-information: #d6ecff;
  --mark-hint: #eeeeee;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --fg: #e6e6e6;
    --muted: #9aa0a6;
    --border: #2a2d33;
    --panel: #1c1f24;
    --accent: #58a6ff;
    --sev-error: #ff6b6b;
    --sev-warning: #f2c14e;
    --sev-information: #58a6ff;
    --sev-hint: #8b949e;
    --mark-error: #4a1f22;
    --mark-warning: #4a3b14;
    --mark-information: #1a2f4a;
    --mark-hint: #2a2d33;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}
.noscript {
  background: var(--mark-warning);
  color: var(--fg);
  padding: 0.75rem 1rem;
  margin: 0;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
header {
  padding: 1.5rem 1.25rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
}
header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
}
.tagline {
  margin: 0;
  color: var(--muted);
}
main {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 1.25rem;
  padding: 0 1.25rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}
@media (max-width: 820px) {
  main { grid-template-columns: 1fr; }
}
section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  min-width: 0;
}
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.75rem;
}
.toolbar label { font-size: 0.9rem; color: var(--muted); }
.toolbar select, .toolbar button {
  font: inherit;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--fg);
  border-radius: 4px;
  cursor: pointer;
}
.toolbar button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
textarea#input {
  width: 100%;
  min-height: 320px;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
  font: 0.95rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  resize: vertical;
}
.summary {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.summary.clean { color: var(--sev-information); }
.summary.dirty { color: var(--sev-warning); }
.summary.warn  { color: var(--sev-error); }

details.packs-wrap, details.preview-wrap {
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
}
details summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
}
.packs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  margin-top: 0.5rem;
}
.pack {
  font-size: 0.9rem;
  white-space: nowrap;
}
.hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
}
.preview {
  margin: 0.5rem 0 0;
  padding: 0.5rem;
  white-space: pre-wrap;
  word-wrap: break-word;
  font: 0.9rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  max-height: 320px;
  overflow: auto;
}
mark.sev-error       { background: var(--mark-error);       color: inherit; border-bottom: 2px solid var(--sev-error); }
mark.sev-warning     { background: var(--mark-warning);     color: inherit; border-bottom: 2px solid var(--sev-warning); }
mark.sev-information { background: var(--mark-information); color: inherit; border-bottom: 2px solid var(--sev-information); }
mark.sev-hint        { background: var(--mark-hint);        color: inherit; border-bottom: 2px dotted var(--sev-hint); }

h2 {
  font-size: 1rem;
  margin: 0.5rem 0;
}
ol.findings {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 480px;
  overflow: auto;
}
ol.findings .empty {
  color: var(--muted);
  padding: 0.5rem 0;
  font-style: italic;
}
ol.findings .finding {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 4px;
  padding: 0.5rem 0.6rem;
  margin-bottom: 0.5rem;
  background: var(--bg);
}
.finding.sev-error    { border-left-color: var(--sev-error); }
.finding.sev-warning  { border-left-color: var(--sev-warning); }
.finding.sev-information { border-left-color: var(--sev-information); }
.finding.sev-hint     { border-left-color: var(--sev-hint); }
.finding-head {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.25rem;
  flex-wrap: wrap;
}
.badge {
  font-size: 0.7rem;
  text-transform: uppercase;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  color: #fff;
  letter-spacing: 0.03em;
}
.badge.sev-error       { background: var(--sev-error); }
.badge.sev-warning     { background: var(--sev-warning); }
.badge.sev-information { background: var(--sev-information); }
.badge.sev-hint        { background: var(--sev-hint); }
.loc {
  font: 0.8rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--muted);
}
.match {
  font: 0.85rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--panel);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  border: 1px solid var(--border);
}
.msg {
  font-size: 0.88rem;
  color: var(--muted);
}
button.fix-one {
  margin-top: 0.4rem;
  font: inherit;
  font-size: 0.8rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--fg);
  border-radius: 3px;
  cursor: pointer;
}
footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}
footer a { color: var(--accent); }
footer .privacy { margin-top: 0.25rem; }