:root{
  --bg: #fbfbfb;
  --surface: #ffffff;
  --text: #1f2328;
  --muted: #586069;
  --border: rgba(31, 35, 40, 0.12);
  --link: #0b4db8;

  --max: 72ch;
  --pad: clamp(16px, 3vw, 28px);

  --radius: 14px;
  --shadow: 0 1px 0 rgba(31, 35, 40, 0.06);
}

*{ box-sizing: border-box; }
html{ color-scheme: light; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a{ color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover{ text-decoration-thickness: 2px; }

.container{
  max-width: calc(var(--max) + 2*var(--pad));
  margin: 0 auto;
  padding: 0 var(--pad);
}

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

main{ padding: 28px 0 64px; }
h1,h2,h3{ line-height: 1.2; letter-spacing: -0.01em; }
h1{ font-size: clamp(28px, 4vw, 40px); margin: 18px 0 10px; }
h2{ font-size: clamp(20px, 2.4vw, 26px); margin: 32px 0 10px; }
p{ margin: 12px 0; }

.small{ color: var(--muted); font-size: 0.95rem; }
.hr{ border-top: 1px solid var(--border); margin: 22px 0; }

.skip{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip:focus{
  position: fixed; left: 12px; top: 12px; width: auto; height: auto;
  padding: 10px 12px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; z-index: 1000;
}