:root {
  color-scheme: light;
  --bg: #f7faf9;
  --text: #13201d;
  --muted: #5f716d;
  --line: #d9e6e2;
  --brand: #0f766e;
  --brand-dark: #134e4a;
  --accent: #c2410c;
  --soft: #e9f6f3;
  --warn: #fff4df;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 20px;
}

.brand {
  color: var(--brand-dark);
  font-weight: 800;
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 14px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--brand-dark);
}

.article {
  max-width: 920px;
  margin: 0 auto;
  padding: 52px 20px 72px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
  color: var(--brand-dark);
}

h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(34px, 5vw, 56px);
}

h2 {
  margin-top: 44px;
  font-size: 28px;
}

h3 {
  margin-top: 28px;
  font-size: 21px;
}

.lead {
  margin: 22px 0 0;
  max-width: 760px;
  color: #2f4540;
  font-size: 20px;
}

.meta {
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

.toc,
.note,
.example,
.cta,
.checklist,
.faq-block,
.score-table {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.toc {
  margin: 34px 0;
  padding: 20px;
}

.toc strong {
  display: block;
  margin-bottom: 8px;
  color: var(--brand-dark);
}

.toc a {
  display: inline-block;
  margin: 6px 14px 0 0;
}

.note {
  margin: 28px 0;
  padding: 18px 20px;
  background: var(--soft);
}

.example {
  margin: 22px 0;
  padding: 20px;
}

.example p:last-child,
.note p:last-child {
  margin-bottom: 0;
}

.checklist {
  margin: 24px 0;
  padding: 22px 24px;
}

.checklist li {
  margin: 8px 0;
}

.score-table {
  width: 100%;
  margin: 24px 0;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
}

.score-table th,
.score-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.score-table tr:last-child td {
  border-bottom: 0;
}

.score-table th {
  background: var(--soft);
  color: var(--brand-dark);
}

.cta {
  margin-top: 48px;
  padding: 26px;
  background: linear-gradient(135deg, #ffffff 0%, #e7f7f3 100%);
}

.cta h2 {
  margin-top: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 18px;
  border-radius: 8px;
  color: #ffffff;
  background: var(--brand);
  font-weight: 800;
  text-decoration: none;
}

.button.secondary {
  color: var(--brand-dark);
  background: #ffffff;
  border: 1px solid var(--line);
}

.faq-block {
  margin-top: 18px;
  padding: 20px 24px;
}

.faq-block h3:first-child {
  margin-top: 0;
}

.related {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.related ul {
  padding-left: 20px;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 26px 20px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

@media (max-width: 720px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .article {
    padding-top: 36px;
  }

  h1 {
    font-size: 36px;
  }

  .lead {
    font-size: 18px;
  }

  .score-table,
  .score-table tbody,
  .score-table tr,
  .score-table td,
  .score-table th {
    display: block;
    width: 100%;
  }

  .score-table th {
    display: none;
  }

  .score-table td {
    border-bottom: 1px solid var(--line);
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}