:root {
  color-scheme: light;
  --ink: #152c28;
  --muted: #465f58;
  --green: #075848;
  --light: #e6f2eb;
  --line: #ceded5;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #f7faf7;
  line-height: 1.65;
}
* { box-sizing: border-box; }
body { margin: 0; }
.shell { width: min(100% - 2.5rem, 70rem); margin-inline: auto; }
header { background: #123a31; color: #fff; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .85rem; flex-wrap: wrap; }
.brand { display: inline-flex; gap: .55rem; align-items: center; font-size: 1.45rem; font-weight: 800; text-decoration: none; letter-spacing: -.045em; }
.brand span { color: #103c30; background: #b9efcf; border-radius: .45rem; padding: 0 .36rem; }
nav { display: flex; flex-wrap: wrap; gap: .35rem 1rem; font-size: .88rem; }
a { color: var(--green); text-underline-offset: .22em; }
a:focus-visible { outline: 2px solid #468761; outline-offset: .2rem; }
header a { color: #effcf4; }
nav a[aria-current="page"] { font-weight: 750; }
.hero { padding-block: clamp(2.5rem, 7vw, 5rem) 2rem; }
.tag { color: var(--green); font-size: .8rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.65rem); letter-spacing: -.065em; line-height: 1.02; max-width: 16ch; margin: .6rem 0 1rem; }
h2 { margin: 1.35rem 0 .45rem; line-height: 1.2; }
h3 { margin: .3rem 0; line-height: 1.25; }
p { margin: 0 0 1rem; }
.hero p { max-width: 59ch; font-size: clamp(1.06rem, 2vw, 1.25rem); color: var(--muted); }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: .85rem; margin-top: 1rem; }
.features div, .callout { padding: 1.15rem; border: 1px solid var(--line); border-radius: .85rem; background: #fff; }
.features span { color: var(--green); font-weight: 800; font-size: .8rem; }
.features p, .callout p:last-child { margin-bottom: 0; }
.callout { margin-top: 1.5rem; background: var(--light); }
.callout h2 { margin-top: 0; }
.info section { border-top: 1px solid var(--line); max-width: 73ch; }
footer { color: var(--muted); border-top: 1px solid var(--line); padding-block: 1.25rem; margin-top: 3rem; }
footer p { font-size: .85rem; margin-bottom: .25rem; }
@media (max-width: 42rem) { .features { grid-template-columns: 1fr; } }