:root {
  --ink: #16212b;
  --muted: #56636f;
  --line: #dfe5ea;
  --bg: #fbfcfc;
  --teal: #0f7c80;
  --teal-soft: #e6f3f3;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--teal); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; }
header { border-bottom: 1px solid var(--line); background: #fff; }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: .2px; }
.mark { width: 26px; height: 26px; border-radius: 6px; background: var(--teal); position: relative; }
.mark::after { content: ""; position: absolute; left: 12px; top: 5px; width: 2px; height: 16px; background: #fff; border-radius: 1px; }
nav a { margin-left: 20px; color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }
main { padding: 56px 0 72px; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 12px; letter-spacing: -.3px; }
h2 { font-size: 22px; margin: 40px 0 10px; }
h3 { font-size: 18px; margin: 28px 0 6px; }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 32px; }
.apps { display: grid; gap: 14px; margin-top: 8px; }
.app { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.app h3 { margin: 0 0 4px; }
.app p { margin: 0; color: var(--muted); font-size: 16px; }
.tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--teal); background: var(--teal-soft); border-radius: 999px; padding: 2px 9px; margin-left: 8px; vertical-align: 2px; }
.box { background: var(--teal-soft); border-radius: 12px; padding: 18px 20px; margin: 24px 0; }
.meta { color: var(--muted); font-size: 15px; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 24px 0 40px; }
footer a { color: var(--muted); }
@media (max-width: 520px) {
  h1 { font-size: 28px; }
  nav a { margin-left: 14px; }
}