:root {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #17202a;
  background: #f3f5f7;
  line-height: 1.45;
}
* { box-sizing: border-box; }
body { margin: 0; }
.wrap { width: min(100% - 28px, 980px); margin: 42px auto; }
.hero, .card, .warnings, .notice { background: #fff; border: 1px solid #dfe3e8; border-radius: 10px; }
.hero { padding: 28px; }
h1 { margin: 0 0 6px; font-size: 30px; }
.hero p { margin: 0 0 24px; color: #59636e; }
label { display:block; font-weight: 650; margin-bottom: 8px; }
.input-row { display:flex; gap:10px; }
input {
  flex:1; min-width:0; padding:13px 14px; border:1px solid #bcc5ce;
  border-radius:7px; font-size:16px; outline:none;
}
input:focus { border-color:#2c6eb5; box-shadow:0 0 0 3px rgba(44,110,181,.12); }
button {
  border:0; border-radius:7px; padding:0 20px; background:#2c6eb5; color:#fff;
  font-weight:700; cursor:pointer; font-size:15px;
}
button:disabled { opacity:.6; cursor:wait; }
.hint { color:#6a737d; font-size:13px; margin-top:8px; }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.status { margin-top:14px; padding:12px 14px; border-radius:8px; border:1px solid #dfe3e8; background:#fff; }
.status.loading { color:#4d5965; }
.status.error { color:#a32626; background:#fff5f5; border-color:#e9b8b8; }
.hidden { display:none !important; }
.overall { margin-top:18px; padding:18px 20px; border:1px solid #dfe3e8; border-radius:10px; display:flex; justify-content:space-between; align-items:center; background:#fff; }
.overall.good { border-left:5px solid #218739; }
.overall.warning { border-left:5px solid #b77900; }
.overall.bad { border-left:5px solid #b3261e; }
.domain { font-family:ui-monospace,monospace; color:#59636e; }
.dot { display:inline-block; width:9px; height:9px; border-radius:50%; background:#218739; margin-right:9px; }
.grid { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-top:14px; }
.card { padding:20px; margin-top:14px; }
.grid .card { margin-top:0; }
h2 { font-size:18px; margin:0 0 14px; }
.subhead { margin-top:24px; padding-top:18px; border-top:1px solid #e8ebee; }
.row { display:grid; grid-template-columns:minmax(130px, 42%) 1fr; gap:12px; padding:9px 0; border-bottom:1px solid #eef0f2; word-break:break-word; }
.row:last-child { border-bottom:0; }
.label { color:#68727c; }
.badge { display:inline-block; border-radius:999px; padding:3px 9px; font-size:12px; font-weight:750; }
.badge.good { background:#e7f5ea; color:#176c2c; }
.badge.bad { background:#fdeaea; color:#a32626; }
.fingerprint { word-break:break-all; font-size:12px; }
.chips { display:flex; flex-wrap:wrap; gap:7px; }
.chips span { background:#f0f2f4; border:1px solid #e0e4e8; padding:5px 8px; border-radius:6px; font-family:ui-monospace,monospace; font-size:12px; }
.chain-item { border:1px solid #e4e7ea; border-radius:8px; padding:12px; margin-bottom:10px; }
.chain-title { font-weight:700; margin-bottom:4px; }
.inline-warning { color:#a32626; font-weight:700; margin-top:6px; }
.warnings { margin-top:14px; padding:18px; background:#fffaf0; border-color:#ead7a3; }
.warnings h3 { margin:0 0 8px; font-size:16px; }
.warnings ul { margin:0; padding-left:20px; }
.notice { margin-top:14px; padding:14px 18px; }
.notice.good { background:#f3fbf5; border-color:#cbe7d0; color:#176c2c; }
.muted, .small, footer { color:#737d87; font-size:13px; }
.small { margin:12px 2px; }
footer { text-align:center; margin:28px 0; }
@media (max-width: 700px) {
  .wrap { margin:18px auto; }
  .hero { padding:20px; }
  h1 { font-size:25px; }
  .input-row { flex-direction:column; }
  button { height:46px; }
  .grid { grid-template-columns:1fr; }
  .grid .card { margin-top:0; }
  .overall { align-items:flex-start; flex-direction:column; gap:6px; }
  .row { grid-template-columns:1fr; gap:3px; }
}

.chain-item.leaf { border-left: 4px solid #2c6eb5; }
.chain-arrow { text-align:center; color:#8a949e; font-size:20px; margin:2px 0; }
.chain-note { margin-top:10px; }