:root {
  color-scheme: dark;
  --bg: #08111f;
  --panel: #111d2e;
  --panel-2: #16263c;
  --text: #edf4ff;
  --muted: #9db0ca;
  --line: #2a3c55;
  --accent: #59a7ff;
  --pass: #35d07f;
  --warning: #f5bd4f;
  --fail: #ff6f78;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(44, 116, 190, .25), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 80px; }
.hero { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1 { margin: 8px 0 10px; font-size: clamp(32px, 5vw, 56px); line-height: 1; }
.hero p { max-width: 760px; color: var(--muted); font-size: 17px; line-height: 1.6; }
.hero-badge { border: 1px solid var(--line); background: var(--panel); padding: 10px 14px; border-radius: 999px; color: var(--muted); }
.panel, .check-card, .summary {
  border: 1px solid var(--line);
  background: rgba(17, 29, 46, .92);
  box-shadow: 0 18px 48px rgba(0,0,0,.22);
  border-radius: 18px;
}
.form-panel { padding: 22px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
label { display: grid; gap: 8px; }
label span, .record-grid span { color: var(--muted); font-size: 13px; font-weight: 700; }
.wide { grid-column: 1 / -1; }
input {
  width: 100%;
  border: 1px solid var(--line);
  background: #0b1626;
  color: var(--text);
  padding: 13px 14px;
  border-radius: 11px;
  outline: none;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(89,167,255,.15); }
button {
  margin-top: 18px;
  border: 0;
  border-radius: 11px;
  background: var(--accent);
  color: #04101f;
  font-weight: 900;
  padding: 13px 18px;
  cursor: pointer;
}
button:disabled { opacity: .55; cursor: wait; }
.hidden { display: none !important; }
#loading { margin-top: 20px; padding: 28px; display: flex; align-items: center; gap: 14px; color: var(--muted); }
.spinner { width: 24px; height: 24px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.summary { margin-top: 20px; padding: 22px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.score { font-size: 44px; font-weight: 950; }
.verdict { color: var(--muted); font-size: 17px; }
.results { display: grid; gap: 16px; margin-top: 18px; }
.check-card { padding: 20px; }
.check-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.check-card h2 { margin: 0 0 7px; font-size: 20px; }
.check-summary { margin: 0; color: var(--muted); }
.status-pill { border-radius: 999px; padding: 7px 10px; font-size: 12px; font-weight: 900; text-transform: uppercase; }
.status-pass { color: var(--pass); background: rgba(53,208,127,.12); }
.status-warning { color: var(--warning); background: rgba(245,189,79,.12); }
.status-fail { color: var(--fail); background: rgba(255,111,120,.12); }
.details { margin: 16px 0 0; padding-left: 22px; color: #c3d2e7; line-height: 1.55; overflow-wrap: anywhere; }
.suggestion { margin-top: 18px; border-top: 1px solid var(--line); padding-top: 18px; }
.suggestion-title { font-weight: 900; margin-bottom: 12px; }
.record-grid { display: grid; grid-template-columns: 130px 1fr; gap: 10px; }
.record-grid > div { display: grid; gap: 6px; }
.record-value { grid-column: 1 / -1; }
code {
  display: block;
  border: 1px solid var(--line);
  background: #081321;
  padding: 10px 12px;
  border-radius: 9px;
  color: #d8e8ff;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.copy-button { margin-top: 12px; padding: 9px 12px; }
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .wide { grid-column: auto; }
  .hero { display: block; }
  .hero-badge { display: inline-block; margin-top: 8px; }
  .summary { align-items: flex-start; }
}

.quick-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 14px;
}
.quick-row button { margin: 0; min-height: 46px; padding-inline: 26px; }
.domain-field input { font-size: 18px; }
.advanced {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.advanced summary {
  color: var(--accent);
  cursor: pointer;
  font-weight: 850;
  user-select: none;
}
.advanced-help { color: var(--muted); margin: 10px 0 14px; font-size: 14px; }
@media (max-width: 720px) {
  .quick-row { grid-template-columns: 1fr; }
  .quick-row button { width: 100%; }
}