*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,"Helvetica Neue",sans-serif;font-size:18px;color:#243238;background:#f6f8f7;line-height:1.65}
img{max-width:100%;height:auto}
a{color:#166534;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#0f4f27}
a:focus-visible,button:focus-visible{outline:3px solid #8ec9a4;outline-offset:3px;border-radius:3px}
.site-header{background:#fff;border-bottom:1px solid #dfe7e2;position:sticky;top:0;z-index:20}
.site-header-inner{max-width:1200px;margin:0 auto;padding:15px 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.site-brand{font-weight:700;font-size:1.3rem;text-decoration:none;color:#17352a;white-space:nowrap}
.site-brand span{display:block;font-size:.75rem;font-weight:400;color:#61726a}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.site-nav a{display:block;padding:9px 11px;border-radius:7px;text-decoration:none;color:#33463e;font-size:1rem}
.site-nav a:hover,.site-nav a[aria-current]{background:#edf5f0;color:#135c30}
.hero{background:linear-gradient(135deg,#eef7f1,#f9fbfa);border-bottom:1px solid #dfe7e2}
.hero-inner{max-width:1200px;margin:0 auto;padding:68px 24px 58px}
.eyebrow{font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.8rem;color:#39704f}
.hero h1{max-width:900px;font-size:clamp(2.2rem,5vw,3.8rem);line-height:1.08;margin:.4rem 0 1rem;color:#17352a}
.hero p{max-width:830px;font-size:1.16rem;color:#4a5d54;margin:0 0 1.4rem}
.actions{display:flex;flex-wrap:wrap;gap:12px}
.button{display:inline-block;padding:12px 18px;border-radius:8px;background:#176738;color:#fff;text-decoration:none;font-weight:700}
.button:hover{background:#0f552d;color:#fff}
.button.secondary{background:#fff;color:#175d34;border:1px solid #bfd1c5}
.page{max-width:1200px;margin:0 auto;padding:42px 24px 68px}
.intro-note{background:#fff;border:1px solid #dce5df;border-left:4px solid #3c7a55;border-radius:8px;padding:18px 21px;margin:0 0 36px}
.section-title{font-size:1.9rem;line-height:1.2;color:#1a372c;margin:44px 0 10px}
.section-lead{max-width:850px;color:#586960;margin-top:0}
.unit-grid,.resource-grid,.trust-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:24px 0 12px}
.card{background:#fff;border:1px solid #dce5df;border-radius:12px;padding:24px;box-shadow:0 3px 12px rgba(24,55,43,.04)}
.card h2,.card h3{margin-top:0;line-height:1.25;color:#1a372c}
.card h2{font-size:1.4rem}
.card h3{font-size:1.16rem}
.card p{color:#52635b}
.card ul{padding-left:1.2rem}
.unit-number{font-size:.8rem;text-transform:uppercase;letter-spacing:.07em;font-weight:700;color:#3e7354}
.card-link{font-weight:700}
.popular-list{background:#fff;border:1px solid #dce5df;border-radius:12px;padding:12px 26px}
.popular-list a{display:block;padding:14px 0;border-bottom:1px solid #edf1ee;font-weight:700;text-decoration:none}
.popular-list a:last-child{border-bottom:0}
.content-page{max-width:980px;margin:0 auto;padding:44px 24px 74px}
.content-page h1{font-size:clamp(2.1rem,4vw,3.1rem);line-height:1.12;color:#17352a;margin-bottom:16px}
.content-page h2{color:#1a372c;margin-top:40px;line-height:1.25}
.content-page h3{color:#29473b;margin-top:30px;line-height:1.3}
.breadcrumbs{font-size:.94rem;color:#6b7a73;margin-bottom:22px}
.byline{font-size:.96rem;color:#64736c;border-bottom:1px solid #e0e7e3;padding-bottom:18px;margin-bottom:28px}
.essay-content>p:first-child{margin-top:0}
.essay-content p{margin:0 0 1.18em}
.essay-content ul,.essay-content ol{padding-left:1.45rem;margin:0 0 1.3rem}
.essay-content li+li{margin-top:.45rem}
.essay-content blockquote{margin:1.5rem 0;padding:1rem 1.2rem;background:#fff;border-left:4px solid #90b69d;color:#40534a}
.essay-content small{color:#64736c}
.essay-content code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:#edf1ee;padding:.12em .3em;border-radius:4px}
.source-note{background:#f0f6f2;border-radius:8px;padding:17px 19px;margin:26px 0}
.table-wrap{overflow-x:auto;margin:1.5rem 0}
table{border-collapse:collapse;width:100%;background:#fff}
.essay-content table{min-width:700px;font-size:.96rem}
th,td{text-align:left;border:1px solid #dce5df;padding:11px;vertical-align:top}
th{background:#edf5f0;color:#29473b}
.site-footer{background:#17352a;color:#dce8e0;margin-top:20px}
.site-footer-inner{max-width:1200px;margin:0 auto;padding:34px 24px}
.site-footer a{color:#fff}
.footer-links{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:12px}
.small{font-size:.9rem;color:#718078}
.site-footer .small{color:#b9c8c0}
.redirect-page{max-width:760px;margin:80px auto;padding:32px;background:#fff;border:1px solid #dce5df;border-radius:12px}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:12px;top:12px;background:#fff;padding:8px;z-index:100}
@media(max-width:820px){
  body{font-size:17px}
  .site-header-inner{align-items:flex-start;flex-direction:column}
  .site-header{position:static}
  .site-nav ul{gap:2px}
  .unit-grid,.resource-grid,.trust-grid{grid-template-columns:1fr}
  .hero-inner{padding-top:44px}
  .hero h1{font-size:2.4rem}
  .content-page{padding-top:32px}
  .essay-content table{min-width:620px}
}