:root {
  color-scheme: light;
  font-family: "PT Sans", Arial, sans-serif;
  line-height: 1.6;
  color: #183228;
  background: #f4faf3;
}

* { box-sizing: border-box; }

body { margin: 0; }

a { color: #176b3a; }

.site-header {
  background: #2e9e4d;
  color: #fff;
  padding: 1rem 1.25rem;
}

.site-header__inner, main, .site-footer {
  width: min(100% - 2.5rem, 860px);
  margin: 0 auto;
}

.brand { color: #fff; font-family: "Fredoka One", cursive; font-size: 1.35rem; text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: .75rem 1rem; margin-top: .5rem; }
.site-nav a { color: #effff2; }

main { padding: 3rem 0; }
h1, h2 { color: #22763b; line-height: 1.2; }
h1 { font-family: "Fredoka One", cursive; font-size: clamp(2rem, 6vw, 3.25rem); margin: 0 0 1rem; }
h2 { margin-top: 2.25rem; }
.eyebrow { color: #327446; font-weight: bold; margin-bottom: .35rem; text-transform: uppercase; letter-spacing: .06em; }
.lead { font-size: 1.18rem; max-width: 44rem; }
.callout { background: #e0f3e1; border-left: 4px solid #35a852; border-radius: .25rem; margin: 1.5rem 0; padding: 1rem 1.25rem; }
pre { background: #163725; border-radius: .5rem; color: #edfff0; overflow-x: auto; padding: 1rem 1.25rem; }
code { font-family: "Source Code Pro", monospace; }
.utility-table { border-collapse: collapse; width: 100%; }
.utility-table th, .utility-table td { border-bottom: 1px solid #c7ddca; padding: .75rem; text-align: left; vertical-align: top; }
.utility-table th { color: #1e6132; }
.lesson-links { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); list-style: none; padding: 0; }
.lesson-links a { background: #fff; border: 1px solid #c7ddca; border-radius: .5rem; display: block; font-weight: bold; padding: .9rem; text-decoration: none; }
.lesson-links a:hover, .lesson-links a:focus { background: #e0f3e1; }
.cta { background: #2e9e4d; border-radius: .5rem; color: white; display: inline-block; font-weight: bold; padding: .75rem 1rem; text-decoration: none; }
.ad-slot--lesson { margin: 2.5rem auto 0; max-width: 728px; min-height: 100px; text-align: center; }
.ad-slot__label { color: #327446; font-size: .75rem; margin: 0 0 .5rem; text-transform: uppercase; }
.site-footer { border-top: 1px solid #c7ddca; padding: 1.5rem 0 2.5rem; }

@media (min-width: 640px) {
  .site-header__inner { align-items: center; display: flex; justify-content: space-between; }
  .site-nav { margin-top: 0; }
}