:root {
  --ink: #0f172a;
  --muted: #5b6b82;
  --line: #dbe4f0;
  --accent: #0284c7;
  --accent-dark: #0369a1;
  --sky: #e0f2fe;
  --pass: #15803d;
  --pass-bg: #dcfce7;
  --fail: #b91c1c;
  --fail-bg: #fee2e2;
  --card: #ffffff;
  --page: #f6f9fc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--page);
  line-height: 1.55;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent-dark); }
code { background: var(--sky); padding: 0 5px; border-radius: 4px; font-size: .92em; }

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.topbar-in {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-weight: 700; color: var(--ink); text-decoration: none; font-size: 1.05rem;
}
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar nav a { text-decoration: none; font-weight: 600; }

.btn {
  display: inline-block;
  background: var(--accent); color: #fff; text-decoration: none;
  padding: 12px 22px; border-radius: 9px; font-weight: 700;
}
.btn:hover { background: var(--accent-dark); }
.btn-small { padding: 7px 14px; border-radius: 7px; color: #fff !important; }

.hero { padding: 42px 0 8px; }
.hero h1 { font-size: 2rem; margin: 0 0 10px; }
.lead { color: var(--muted); font-size: 1.05rem; margin: 0 0 22px; }

.scan-form { display: flex; gap: 10px; }
.scan-form input {
  flex: 1; padding: 13px 15px; font-size: 1rem;
  border: 1.5px solid var(--line); border-radius: 9px; background: #fff;
}
.scan-form input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.scan-form button {
  padding: 13px 26px; font-size: 1rem; font-weight: 700;
  background: var(--accent); color: #fff; border: 0; border-radius: 9px;
  cursor: pointer;
}
.scan-form button:hover:not(:disabled) { background: var(--accent-dark); }
.scan-form button:disabled { opacity: .55; cursor: wait; }

.examples { color: var(--muted); margin: 12px 0 0; font-size: .95rem; }
.chip {
  border: 1px solid var(--line); background: #fff; color: var(--accent-dark);
  border-radius: 999px; padding: 3px 12px; margin-left: 6px; cursor: pointer;
  font-size: .9rem; font-weight: 600;
}
.chip:hover { border-color: var(--accent); }

.status { min-height: 1.4em; color: var(--muted); margin: 14px 0 0; }
.status.error { color: var(--fail); font-weight: 600; }

.hidden { display: none !important; }

.result {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 24px; margin: 22px 0;
}
.score-row { display: flex; gap: 26px; align-items: center; flex-wrap: wrap; }
.score-box { text-align: center; min-width: 110px; }
.score { font-size: 3.4rem; font-weight: 800; line-height: 1; color: var(--accent-dark); }
.score-sub { color: var(--muted); font-size: .85rem; }
.grade-line { font-size: 1.15rem; font-weight: 600; }
.grade {
  display: inline-block; min-width: 34px; text-align: center;
  padding: 1px 9px; border-radius: 7px; color: #fff; background: #64748b;
  font-weight: 800;
}
.grade-A, .grade-B { background: var(--pass); }
.grade-C { background: #d97706; }
.grade-D, .grade-F { background: var(--fail); }
.target-line { color: var(--muted); margin-top: 4px; word-break: break-all; }
.counts { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.count {
  background: var(--sky); border-radius: 999px; padding: 2px 11px;
  font-size: .85rem; font-weight: 600; text-transform: capitalize;
}
.count-total { background: var(--ink); color: #fff; }

.result h2 { font-size: 1.1rem; margin: 24px 0 10px; }
.categories {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 8px;
}
.cat {
  display: flex; justify-content: space-between; align-items: center;
  border-radius: 8px; padding: 8px 12px; font-size: .93rem;
}
.cat.pass { background: var(--pass-bg); }
.cat.fail { background: var(--fail-bg); }
.cat.neutral { background: var(--sky); }
.cat-state { font-weight: 800; font-size: .8rem; letter-spacing: .04em; }
.cat.pass .cat-state { color: var(--pass); }
.cat.fail .cat-state { color: var(--fail); }
.subdomains { color: var(--muted); font-size: .92rem; word-break: break-word; }
.note {
  background: var(--sky); border-radius: 9px; padding: 11px 14px;
  color: var(--ink); font-size: .95rem;
}
.cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 16px; }
.cta-sub { color: var(--muted); font-size: .9rem; max-width: 480px; }

.explainer { padding: 6px 0 34px; color: var(--muted); }
.explainer h2 { color: var(--ink); font-size: 1.15rem; }
.fineprint { font-size: .88rem; }

footer { border-top: 1px solid var(--line); background: var(--card); }
.foot-in {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  padding: 16px 20px; color: var(--muted); font-size: .92rem;
}

@media (max-width: 560px) {
  .scan-form { flex-direction: column; }
  .hero h1 { font-size: 1.6rem; }
  .score { font-size: 2.7rem; }
}