:root{
  --bg: #0e0e0e;
  --fg: #e5e5e5;
  --muted: #b9b9b9;
  --dim: #8a8a8a;
  --hair: rgba(229,229,229,.12);
  --max: 720px;
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Source Serif 4", "Libre Baskerville", Georgia, serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 22px 40px;
}

.hero{
  padding: 10px 0 26px;
  border-bottom: 1px solid var(--hair);
}

.kicker{
  letter-spacing: .08em;
  text-transform: lowercase;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 12px;
}

h1{
  margin: 0 0 10px;
  font-size: 42px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.subtitle{
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 48ch;
}

.section{
  padding: 26px 0;
  border-bottom: 1px solid var(--hair);
}

h2{
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: .01em;
}

p{ margin: 0 0 12px; }
p:last-child{ margin-bottom: 0; }

ul{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}
li{ margin: 6px 0; }

.toc{
  columns: 1;
}

.two-col{
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.purchase{
  border-bottom: none;
  padding-bottom: 10px;
}

.price{
  margin-bottom: 18px;
}

.amount{
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.meta{
  color: var(--muted);
  font-size: 14px;
  margin-top: 4px;
}

.button{
  display: inline-block;
  padding: 12px 16px;
  border: 1px solid var(--hair);
  color: var(--fg);
  text-decoration: none;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: .02em;
}

.button:hover{
  border-color: rgba(229,229,229,.22);
}

.fineprint{
  margin-top: 14px;
  color: var(--dim);
  font-size: 13px;
}

.footer{
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  color: var(--dim);
  font-size: 13px;
}

.footer a{
  color: var(--dim);
  text-decoration: none;
  margin-left: 14px;
}
.footer a:hover{ color: var(--muted); }

@media (min-width: 780px){
  .wrap{ padding: 72px 0 48px; }
  .two-col{ grid-template-columns: 1fr 1fr; gap: 28px; }
}