:root {
  --paper: #f6f7f5;
  --ink: #1d2a2f;
  --granite: #5b676b;
  --rule: #d9dedc;
  --air: #1f5e52;
  --amber: #d9a21b;
  --sand: #cfc6b2;
  --silt: #a9a08c;
  --shale: #7d857a;
  --bedrock: #4e5852;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 1.0625rem/1.55 "Atkinson Hyperlegible", system-ui, sans-serif;
}
a { color: var(--air); text-underline-offset: .15em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; border-radius: 2px; }
h1, h2, h3 { line-height: 1.15; margin: 0; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 700; letter-spacing: -.02em; max-width: 22ch; text-wrap: balance; }
h2 { font-size: 1.5rem; margin: 2.5rem 0 .75rem; }
h3 { font-size: 1.125rem; }
.wrap { max-width: 64rem; margin: 0 auto; padding: 0 1.25rem; }
.narrow { max-width: 42rem; }
.lede { font-size: 1.1875rem; color: var(--granite); max-width: 40rem; margin: .75rem 0 1.5rem; }

.top { border-bottom: 1px solid var(--rule); }
.top .wrap { display: flex; justify-content: space-between; align-items: center; padding-block: .9rem; gap: 1rem; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; font-size: 1.125rem; }
.for-biz { font-size: .9375rem; }

/* The ground: soil layers, the place radon comes from. */
.strata {
  position: relative; overflow: hidden; height: 3.25rem;
  background: linear-gradient(var(--sand) 0 18%, var(--silt) 18% 40%, var(--shale) 40% 68%, var(--bedrock) 68% 100%);
}
.strata.thin { height: .9rem; margin: 0 0 2rem; border-radius: 2px; }
.strata i {
  position: absolute; bottom: -6px; width: 5px; height: 5px; border-radius: 50%;
  background: var(--paper); opacity: 0; animation: rise 9s linear infinite;
}
.strata i:nth-child(1) { left: 12%; animation-delay: 0s; }
.strata i:nth-child(2) { left: 31%; animation-delay: 3.4s; }
.strata i:nth-child(3) { left: 54%; animation-delay: 6.1s; }
.strata i:nth-child(4) { left: 73%; animation-delay: 1.7s; }
.strata i:nth-child(5) { left: 90%; animation-delay: 4.8s; }
@keyframes rise {
  0% { transform: translateY(0); opacity: 0; }
  15% { opacity: .55; }
  85% { opacity: .55; }
  100% { transform: translateY(-3.6rem); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .strata i { animation: none; } }

.hero { padding-top: clamp(2.5rem, 8vw, 5rem); }
.hero .wrap { padding-bottom: 2.25rem; }
.search label { display: block; font-weight: 700; margin-bottom: .4rem; }
.search input {
  width: 100%; max-width: 36rem; font: inherit; font-size: 1.25rem; color: var(--ink);
  padding: .8rem 1rem; border: 2px solid var(--ink); border-radius: 6px; background: #fff;
}
.search input:focus-visible { outline-offset: 0; }

.results h2 { margin-top: 2rem; }
.results .none { color: var(--granite); }

.state-grid, .jump ul {
  list-style: none; padding: 0; margin: 0;
  columns: 4 12rem; column-gap: 2rem;
}
.state-grid li, .jump li { break-inside: avoid; padding: .3rem 0; border-bottom: 1px solid var(--rule); display: flex; justify-content: space-between; gap: .5rem; }
.state-grid span, .jump span { color: var(--granite); font-variant-numeric: tabular-nums; }

.facts { padding-left: 1.2rem; max-width: 40rem; }
.facts li { margin-bottom: .5rem; }
.source { font-size: .9375rem; color: var(--granite); }

.crumbs { font-size: .9375rem; margin: 1.5rem 0 1rem; color: var(--granite); }
.jump { margin-bottom: 1.5rem; }
.jump summary { cursor: pointer; font-weight: 700; color: var(--air); }
.jump ul { margin-top: .75rem; }

.list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--rule); }
.biz { padding: 1.1rem 0; border-bottom: 1px solid var(--rule); }
.biz p { margin: .15rem 0; }
.biz .kind { color: var(--granite); }
.biz .place { font-weight: 700; }
.biz .addr { font-size: .9375rem; color: var(--granite); }
.actions { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; align-items: center; margin-top: .6rem !important; }
.call {
  display: inline-block; background: var(--air); color: #fff; text-decoration: none;
  font-weight: 700; padding: .5rem .9rem; border-radius: 6px;
}
.call:hover { background: #174a40; }
.site { font-weight: 700; }
.claim { font-size: .875rem; }
.claim a { color: var(--granite); }
.featured { border-left: 4px solid var(--amber); padding-left: 1rem; background: #fffaf0; }
.badge { font-size: .875rem; font-weight: 700; color: #7a5a06; }
.more { margin: -.4rem 0 .75rem; font-size: .9375rem; }
.back { margin: 2rem 0; }

.invite { border: 1px dashed var(--silt); border-radius: 6px; padding: .75rem 1rem; margin-bottom: 1.5rem; font-size: .9375rem; }
.invite p { margin: 0; }

.button {
  display: inline-block; background: var(--air); color: #fff; text-decoration: none;
  font-weight: 700; padding: .65rem 1.1rem; border-radius: 6px;
}
.button:hover { background: #174a40; }

.foot { margin-top: 4rem; border-top: 1px solid var(--rule); color: var(--granite); font-size: .9375rem; padding: 1.5rem 0 3rem; }
.foot p { margin: .3rem 0; }

@media (max-width: 40rem) {
  body { font-size: 1rem; }
  h2 { margin-top: 2rem; }
  .call { padding: .65rem 1rem; }
}

.faq { max-width: 44rem; margin-top: 3rem; }
.q { border-bottom: 1px solid var(--rule); padding: .75rem 0; }
.q summary { cursor: pointer; font-weight: 700; }
.q p { margin: .5rem 0 0; color: var(--granite); }
.nearby ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .4rem 1.25rem; }