:root {
  --ink: #111827;
  --muted: #53605b;
  --page: #f7f8f5;
  --surface: #ffffff;
  --band: #e9efea;
  --line: #d7e3da;
  --primary: #18735c;
  --primary-dark: #0f5e4b;
  --blue: #315c9a;
  --amber: #b7791f;
  --danger: #9f3a38;
  --shadow: 0 20px 60px rgba(17, 24, 39, 0.08);
  --radius: 8px;
  --max: 1180px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(215, 227, 218, 0.95);
  background: rgba(247, 248, 245, 0.92);
  backdrop-filter: blur(18px);
}

.header-inner {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0;
}

.mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.mark svg {
  width: 20px;
  height: 20px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 0.93rem;
}

.nav a {
  padding: 9px 10px;
  border-radius: 8px;
}

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

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 13px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 700;
}

.container {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
}

.hero {
  padding: 58px 0 34px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.78fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--primary);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  margin-top: 18px;
  font-size: clamp(3.1rem, 7vw, 6.7rem);
}

.hero-copy {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  font-weight: 800;
  color: var(--ink);
}

.button.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.hero-visual {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 10px;
  box-shadow: var(--shadow);
}

.quick-panel {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat {
  min-height: 104px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.stat b {
  display: block;
  font-size: 1.7rem;
}

.stat span {
  color: var(--muted);
  font-size: 0.92rem;
}

.band {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.band.alt {
  background: var(--surface);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.section-head h2 {
  font-size: clamp(2rem, 3vw, 3rem);
}

.section-head p {
  max-width: 560px;
  color: var(--muted);
  margin: 0;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  min-height: 100%;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.card:hover {
  border-color: rgba(24, 115, 92, 0.45);
  box-shadow: var(--shadow);
}

.card .kicker {
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card h3 {
  margin-top: 10px;
  font-size: 1.2rem;
  line-height: 1.18;
}

.card p {
  color: var(--muted);
  margin: 12px 0 0;
}

.guide-shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 38px;
  align-items: start;
  padding: 42px 0 62px;
}

.toc {
  position: sticky;
  top: 96px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.toc strong {
  display: block;
  margin-bottom: 10px;
}

.toc a {
  display: block;
  color: var(--muted);
  padding: 7px 0;
  font-size: 0.94rem;
}

.guide-hero {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.guide-hero h1 {
  font-size: clamp(2.7rem, 5vw, 5rem);
}

.guide-hero p {
  color: var(--muted);
  font-size: 1.12rem;
  margin: 18px 0 0;
}

.summary-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.summary-row div {
  padding: 14px;
  border-radius: 8px;
  background: var(--page);
  border: 1px solid var(--line);
}

.summary-row b {
  display: block;
  margin-bottom: 5px;
}

.content-section {
  margin-top: 28px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.content-section h2 {
  font-size: clamp(1.7rem, 2vw, 2.35rem);
}

.content-section > p {
  color: var(--muted);
}

.matrix,
.checklist,
.notes {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.matrix-item,
.check-item,
.note-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px;
  border-radius: 8px;
  background: var(--page);
  border: 1px solid var(--line);
}

.badge {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  font-size: 0.86rem;
}

.badge.blue {
  background: var(--blue);
}

.badge.amber {
  background: var(--amber);
}

.matrix-item h3,
.check-item h3,
.note-item h3 {
  font-size: 1.02rem;
  margin: 0 0 4px;
}

.matrix-item p,
.check-item p,
.note-item p {
  color: var(--muted);
  margin: 0;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  min-width: 640px;
}

th,
td {
  padding: 13px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: var(--page);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

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

.related {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.related a {
  padding: 9px 11px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--primary-dark);
  background: var(--page);
  font-weight: 800;
}

.site-footer {
  padding: 38px 0 46px;
  background: var(--ink);
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  align-items: start;
}

.site-footer p,
.site-footer a {
  color: rgba(255, 255, 255, 0.72);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 12px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  background: var(--ink);
  color: #fff;
  padding: 8px 10px;
  z-index: 50;
}

.skip-link:focus {
  left: 10px;
}

@media (max-width: 980px) {
  .header-inner {
    align-items: start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav {
    flex-wrap: wrap;
  }

  .header-cta {
    display: none;
  }

  .hero-grid,
  .guide-shell,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .grid.cols-3,
  .grid.cols-4,
  .quick-panel,
  .summary-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container,
  .header-inner {
    width: min(100% - 24px, var(--max));
  }

  h1 {
    font-size: 3rem;
  }

  .hero {
    padding-top: 34px;
  }

  .section-head {
    display: block;
  }

  .guide-hero,
  .content-section {
    padding: 20px;
  }

  .footer-links {
    justify-content: start;
  }
}