/* $pend — brand green #1B5E20 light, #2E7D32 dark, per design-system.md. */
:root {
  --green: #1B5E20;
  --ink: #16181a;
  --muted: #5c6469;
  --bg: #ffffff;
  --panel: #f4f6f5;
  --line: #e2e6e4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --green: #2E7D32;
    --ink: #eceff1;
    --muted: #a3adb2;
    --bg: #101312;
    --panel: #191d1c;
    --line: #2a302e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 1.25rem 4rem;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

header, main, footer { max-width: 40rem; margin: 0 auto; }

header {
  padding: 3.5rem 0 2rem;
  text-align: center;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.5rem;
}

header.compact { padding: 2.5rem 0 1.5rem; text-align: left; }

.mark {
  width: 76px; height: 76px;
  margin: 0 auto 1.25rem;
  border-radius: 17px;
  background: var(--green);
  color: #fff;
  font-size: 46px;
  font-weight: 700;
  line-height: 76px;
}

h1 { font-size: 2rem; margin: 0 0 .35rem; letter-spacing: -0.02em; }
h2 { font-size: 1.2rem; margin: 2.25rem 0 .6rem; letter-spacing: -0.01em; }

.tagline { color: var(--muted); margin: 0; }
.updated { color: var(--muted); font-size: .9rem; margin: .25rem 0 0; }
.lede { font-size: 1.1rem; }

.back {
  display: inline-block;
  margin-bottom: 1.25rem;
  color: var(--green);
  font-weight: 600;
  text-decoration: none;
}

a { color: var(--green); }
a:hover { text-decoration: none; }

p, li { margin: .6rem 0; }
ul, dl { padding-left: 1.2rem; }
ul { margin: .6rem 0; }
dl { padding-left: 0; }
dt { font-weight: 600; margin-top: .8rem; }
dd { margin: .15rem 0 0; padding-left: 0; color: var(--muted); }

code {
  background: var(--panel);
  padding: .1em .4em;
  border-radius: 5px;
  font-size: .92em;
}

.callout {
  background: var(--panel);
  border-left: 3px solid var(--green);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.callout p { margin: 0; }
.pillars { list-style: none; padding: 0; }
.pillars li { padding: .5rem 0; border-bottom: 1px solid var(--line); }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 3rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

footer {
  margin-top: 2.5rem;
  color: var(--muted);
  font-size: .85rem;
  text-align: center;
}