:root {
  --paper: #e8e4d8;
  --ink: #14120e;
  --mute: #5c574c;
  --rule: #14120e;
  --btn: #14120e;
  --btn-fg: #e8e4d8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 14px;
  line-height: 1.55;
  min-height: 100dvh;
}
body.night {
  --paper: #11110e;
  --ink: #e8e4d8;
  --mute: #a39c8c;
  --rule: #e8e4d8;
  --btn: #e8e4d8;
  --btn-fg: #11110e;
}
body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.07;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap { max-width: 980px; margin: 0 auto; padding: 22px 22px 80px; }
.bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 12px;
  margin-bottom: 36px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.bar nav { display: flex; gap: 18px; }
.bar a:hover { text-decoration: underline; }

.kicker {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mute);
  margin: 0 0 14px;
}
h1 {
  font-family: "IBM Plex Serif", "Times New Roman", serif;
  font-weight: 400;
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.sub { max-width: 420px; color: var(--mute); margin: 0 0 28px; }

.btn {
  display: inline-block;
  border: 1px solid var(--rule);
  background: var(--btn);
  color: var(--btn-fg);
  padding: 12px 18px;
  font: inherit;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}
.btn.ghost { background: transparent; color: var(--ink); }
.btn:hover { opacity: 0.86; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }

.hero { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero img { width: 100%; }
.center { text-align: center; }
.center .sub { margin-left: auto; margin-right: auto; }
.center img { margin: 8px auto 28px; width: min(380px, 80vw); }

.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  margin: 56px 0 0;
}
.spec { padding: 18px 16px; border-right: 1px solid var(--rule); }
.specs .spec:nth-child(2n) { border-right: none; }
.specs .spec:nth-child(n+3) { border-top: 1px solid var(--rule); }
.spec b { display: block; font-weight: 500; margin-bottom: 4px; }
.spec span { color: var(--mute); font-size: 12px; }

.buy {
  margin-top: 40px;
  border: 1px solid var(--rule);
  padding: 20px;
}
.buy .price { font-size: 22px; margin: 0 0 4px; }
.buy .per { color: var(--mute); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 16px; }
.plan { display: flex; justify-content: space-between; align-items: baseline; border: 1px solid var(--rule); padding: 12px 14px; margin-bottom: 8px; }
.plan.on { background: var(--ink); color: var(--paper); }
body.night .plan.on { background: var(--ink); color: var(--paper); }

.toc { display: grid; gap: 0; border: 1px solid var(--rule); }
.toc a {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 16px;
  padding: 18px 16px;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.toc a:last-child { border-bottom: none; }
.toc a:hover { background: var(--ink); color: var(--paper); }
.toc .n { letter-spacing: 0.16em; font-size: 11px; }
.toc .t { font-family: "IBM Plex Serif", serif; font-size: 22px; }
.toc .m { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--mute); }
.toc a:hover .m { color: inherit; }

.steps { margin-top: 56px; }
.step { display: grid; grid-template-columns: 48px 1fr; gap: 16px; padding: 16px 0; border-top: 1px solid var(--rule); }
.fine { margin-top: 40px; font-size: 11px; color: var(--mute); letter-spacing: 0.08em; text-transform: uppercase; }

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; }
  .hero img { max-width: 320px; margin: 0 auto; }
  .specs { grid-template-columns: 1fr; }
  .spec, .specs .spec:nth-child(2n) { border-right: none; }
  .specs .spec + .spec { border-top: 1px solid var(--rule); }
  .toc a { grid-template-columns: 48px 1fr; }
  .toc .m { grid-column: 2; }
}