:root {
  color-scheme: light;
  --ink: #14201d;
  --muted: #52635e;
  --line: #d8e2de;
  --paper: #ffffff;
  --wash: #f4f8f6;
  --green: #0b6b57;
  --green-dark: #084c40;
  --teal: #087f8c;
  --gold: #9a6410;
  --warning: #fff7e7;
  --shadow: 0 18px 50px rgba(13, 48, 40, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: 0;
}

a {
  color: var(--green);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--green-dark);
}

img {
  max-width: 100%;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner,
.content-width {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: 34px;
  height: 34px;
}

.brand small {
  border-left: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  padding-left: 10px;
}

.topic-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.topic-nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

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

.topic-hero {
  background: var(--wash);
  border-bottom: 1px solid var(--line);
  padding: 72px 0 64px;
}

.topic-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 72px;
  align-items: center;
}

.eyebrow {
  color: var(--green);
  display: block;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 14px;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: 48px;
  margin-bottom: 20px;
  max-width: 820px;
}

h2 {
  font-size: 30px;
  margin-bottom: 18px;
}

h3 {
  font-size: 21px;
  margin-bottom: 10px;
}

.hero-summary {
  color: var(--muted);
  font-size: 20px;
  max-width: 760px;
}

.hero-facts {
  border-left: 4px solid var(--teal);
  padding: 4px 0 4px 26px;
}

.hero-facts strong {
  display: block;
  font-size: 28px;
}

.hero-facts span {
  color: var(--muted);
  display: block;
  font-size: 14px;
  margin-bottom: 18px;
}

.hero-facts span:last-child {
  margin-bottom: 0;
}

.breadcrumbs {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 22px;
}

.breadcrumbs a {
  color: inherit;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) 260px;
  gap: 72px;
  padding: 64px 0 80px;
}

.article-body > section {
  border-bottom: 1px solid var(--line);
  margin-bottom: 42px;
  padding-bottom: 38px;
}

.article-body > section:last-child {
  border-bottom: 0;
}

.article-body p,
.article-body li {
  color: #30433d;
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
}

.article-body li + li {
  margin-top: 8px;
}

.takeaway,
.safety-note {
  border-left: 4px solid var(--green);
  margin: 0 0 40px;
  padding: 20px 24px;
}

.takeaway {
  background: #edf8f4;
}

.safety-note {
  background: var(--warning);
  border-left-color: var(--gold);
}

.takeaway strong,
.safety-note strong {
  display: block;
  margin-bottom: 5px;
}

.article-meta {
  color: var(--muted);
  font-size: 14px;
  margin-top: 24px;
}

.article-aside {
  align-self: start;
  position: sticky;
  top: 104px;
}

.article-aside nav {
  border-left: 1px solid var(--line);
  display: grid;
  gap: 12px;
  padding-left: 22px;
}

.article-aside strong {
  display: block;
  font-size: 14px;
  margin-bottom: 15px;
  text-transform: uppercase;
}

.article-aside a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.article-aside a:hover {
  color: var(--green);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin: 34px 0 48px;
}

.topic-card {
  border: 1px solid var(--line);
  border-radius: 6px;
  color: inherit;
  min-height: 230px;
  padding: 26px;
  text-decoration: none;
}

.topic-card:hover {
  border-color: var(--green);
  box-shadow: var(--shadow);
  color: inherit;
}

.topic-card .number {
  color: var(--teal);
  display: block;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 30px;
}

.topic-card p {
  color: var(--muted);
  font-size: 15px;
}

.source-list {
  font-size: 15px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  align-items: center;
  background: var(--green);
  border: 1px solid var(--green);
  border-radius: 5px;
  color: #ffffff;
  display: inline-flex;
  font-size: 15px;
  font-weight: 800;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  text-decoration: none;
}

.button:hover {
  background: var(--green-dark);
  color: #ffffff;
}

.button.secondary {
  background: transparent;
  color: var(--green);
}

.button.secondary:hover {
  background: #edf8f4;
  color: var(--green-dark);
}

.site-footer {
  background: #13221e;
  color: #e8f1ed;
  padding: 46px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 36px;
}

.site-footer h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.site-footer h3 {
  color: #a7bbb4;
  font-size: 13px;
  text-transform: uppercase;
}

.site-footer p,
.site-footer a {
  color: #bed0ca;
  font-size: 14px;
}

.site-footer nav {
  display: grid;
  gap: 8px;
}

.disclaimer {
  border-top: 1px solid #31433d;
  margin-top: 34px;
  padding-top: 22px;
}

@media (max-width: 860px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 12px 0;
  }

  .topic-nav {
    max-width: 100%;
    padding-bottom: 8px;
    width: 100%;
  }

  .topic-hero {
    padding: 48px 0;
  }

  .topic-hero-grid,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .topic-hero-grid,
  .article-layout {
    gap: 34px;
  }

  .article-aside {
    position: static;
  }

  .article-aside nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .header-inner,
  .content-width {
    width: min(100% - 28px, 1120px);
  }

  .brand small {
    display: none;
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 26px;
  }

  .hero-summary {
    font-size: 18px;
  }

  .topic-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .article-layout {
    padding: 46px 0 60px;
  }

  .article-aside nav {
    grid-template-columns: 1fr;
  }
}