:root { color-scheme: light; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #172c35; background: #f9faf7; line-height: 1.65; }
* { box-sizing: border-box; }
body { margin: 0; }
a { color: #12614f; text-underline-offset: .18em; }
a:hover { color: #093f33; }
a:focus-visible { outline: 3px solid #c37529; outline-offset: 4px; }
.shell { width: min(100% - 3rem, 70rem); margin-inline: auto; }
.site-header { border-bottom: 1px solid #d6e0d8; background: #f9faf7; }
.header-inner, .footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.header-inner { min-height: 5rem; }
.brand { color: #172c35; font-size: 1.1rem; font-weight: 750; letter-spacing: -.025em; text-decoration: none; }
nav, .footer-inner div { display: flex; flex-wrap: wrap; gap: 1.4rem; }
nav a { font-size: .95rem; text-decoration: none; }
nav a[aria-current="page"] { font-weight: 700; text-decoration: underline; }
.hero { padding-block: clamp(5rem, 11vw, 9rem); }
.eyebrow { margin: 0 0 1rem; color: #12614f; font-size: .76rem; font-weight: 750; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.035em; }
h1 { max-width: 14ch; margin: 0 0 1.5rem; font-size: clamp(2.8rem, 7vw, 5.6rem); }
h2 { margin: 0 0 1.3rem; font-size: clamp(1.8rem, 4vw, 2.7rem); }
h3 { margin: 1.1rem 0 .6rem; font-size: 1.2rem; }
p { max-width: 70ch; }
.lead { max-width: 58ch; margin: 0 0 2rem; color: #40565c; font-size: clamp(1.1rem, 2.1vw, 1.3rem); }
.button { display: inline-block; padding: .8rem 1.2rem; border-radius: .4rem; background: #12614f; color: #fff; font-weight: 650; text-decoration: none; }
.button:hover { background: #093f33; color: #fff; }
.section { padding-block: clamp(3.5rem, 7vw, 6rem); }
.band { background: #e8f0e8; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; margin-top: 3rem; }
.number { color: #12614f; font-size: .85rem; font-weight: 700; }
.grid p { color: #40565c; }
.reading { max-width: 52rem; }
.reading h1 { font-size: clamp(2.8rem, 6vw, 4.5rem); }
.reading h2 { margin-top: 2.8rem; font-size: 1.6rem; }
.reading li { margin-block: .7rem; }
code { overflow-wrap: anywhere; font-size: .9em; }
footer { border-top: 1px solid #d6e0d8; color: #526667; font-size: .88rem; }
.footer-inner { min-height: 6rem; }
@media (max-width: 640px) {
  .header-inner, .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 1.2rem; gap: .6rem; }
  .grid { grid-template-columns: 1fr; gap: 1.2rem; }
  nav { gap: 1rem; }
}