body {
  margin: 0;
  color: #1f2933;
  background: #f4f6f8;
  font-family: Roboto, Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

a {
  color: #1565c0;
}

.site-header {
  background: #1976d2;
  color: #fff;
  padding: 18px 24px;
}

.site-header a {
  color: #fff;
  text-decoration: none;
}

.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

@media (max-width: 600px) {
  .wrap {
    padding: 0 16px;
  }
}

.hero,
.content {
  background: #fff;
  border: 1px solid #d7dee7;
  border-radius: 8px;
  margin: 24px auto;
  padding: clamp(20px, 4vw, 32px);
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.12;
  margin: 0 0 14px;
}

.hero__meta {
  color: #5f6b7a;
  font-size: 0.95rem;
  margin: 0 0 10px;
}

.lead {
  color: #4b5563;
  font-size: 1.15rem;
  margin: 0;
}

.cta {
  display: inline-block;
  background: #1976d2;
  border-radius: 6px;
  color: #fff;
  font-weight: 700;
  margin-top: 18px;
  padding: 10px 16px;
  text-decoration: none;
}

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.toc {
  background: #f8fafc;
  border: 1px solid #d7dee7;
  border-radius: 8px;
  display: grid;
  gap: 8px;
  margin: 22px 0;
  padding: 16px;
}

.toc a {
  font-weight: 500;
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

.summary-list {
  margin: 18px 0;
  padding-left: 22px;
}

.summary-list li {
  margin: 8px 0;
}

.table-wrap {
  border: 1px solid #d7dee7;
  border-radius: 8px;
  margin: 18px 0 28px;
  overflow-x: auto;
}

table {
  border-collapse: collapse;
  min-width: 720px;
  width: 100%;
}

th,
td {
  border-bottom: 1px solid #e5eaf0;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f8fafc;
  color: #334155;
  font-size: 0.9rem;
  font-weight: 700;
}

td.numeric,
th.numeric {
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

.formula {
  background: #f8fafc;
  border: 1px solid #d7dee7;
  border-radius: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92rem;
  margin: 14px 0 22px;
  overflow-x: auto;
  padding: 14px 16px;
}

.callout {
  background: #eef6ff;
  border: 1px solid #b8d8f8;
  border-radius: 8px;
  margin: 18px 0;
  padding: 16px;
}

.liability-waiver {
  background: #fff8d6;
  border: 1px solid #f1dd84;
  border-radius: 8px;
  color: #3f3a1f;
  margin: 0 0 24px;
  padding: 14px 16px;
}

.official-sources {
  border-top: 1px solid #d7dee7;
  margin-top: 28px;
  padding-top: 20px;
}

.official-sources h2 {
  font-size: 1.25rem;
  margin-top: 0;
}

.official-sources ul {
  margin: 0;
  padding-left: 22px;
}

.official-sources li {
  margin: 8px 0;
}

.source {
  color: #5f6b7a;
  font-size: 0.9rem;
}

.note {
  background: #fff8d6;
  border: 1px solid #f1dd84;
  border-radius: 8px;
  padding: 16px;
}

footer {
  color: #64748b;
  padding: 28px 0 40px;
}