@font-face {
  font-family: "Kotobake Text";
  src: url("fonts.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

:root {
  --paper: #f3ebdd;
  --paper-deep: #e7dcc8;
  --ink: #1a1612;
  --ink-soft: #4a433c;
  --cinnabar: #c23b2e;
  --gold: #8e6a14;
  --rule: rgba(26, 22, 18, 0.18);
  --serif: "Kotobake Text", "Iowan Old Style", "Songti SC", "Source Han Serif SC", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

a { color: inherit; }

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 7vw;
  background: rgba(243, 235, 221, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1.5px solid var(--cinnabar);
  color: var(--cinnabar);
  border-radius: 3px;
  font-size: 20px;
  line-height: 1;
}

.brand-name { font-size: 18px; letter-spacing: 0.3em; }

nav { display: flex; align-items: center; gap: 28px; }

nav a { text-decoration: none; font-size: 16px; color: var(--ink-soft); }

nav a:hover { color: var(--ink); }

.nav-cta {
  color: var(--paper) !important;
  background: var(--ink);
  padding: 6px 16px;
  border-radius: 3px;
}

h1, h2, h3 { font-weight: 500; line-height: 1.3; margin: 0; }

h1 { font-size: clamp(36px, 5vw, 60px); letter-spacing: 0.04em; }

h2 { font-size: clamp(28px, 3.4vw, 40px); letter-spacing: 0.06em; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.28em;
  font-size: 14px;
  color: var(--gold);
  margin: 0 0 18px;
}

.seal {
  display: inline-grid;
  place-items: center;
  padding: 2px 7px;
  border: 1.5px solid var(--cinnabar);
  color: var(--cinnabar);
  border-radius: 2px;
  letter-spacing: 0.2em;
  font-size: 13px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(260px, 420px) 1fr;
  gap: 6vw;
  align-items: center;
  padding: 6vh 7vw 8vh;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-art img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  box-shadow: 0 18px 50px rgba(26, 22, 18, 0.18);
}

.lead { font-size: 19px; color: var(--ink-soft); max-width: 38em; }

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin: 28px 0 12px; }

.btn {
  display: inline-block;
  background: var(--cinnabar);
  color: #fbf6ee;
  text-decoration: none;
  padding: 12px 26px;
  border-radius: 3px;
  letter-spacing: 0.12em;
  font-size: 17px;
  border: 1.5px solid var(--cinnabar);
}

.btn:hover { background: #a83226; }

.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }

.btn.ghost:hover { background: var(--ink); color: var(--paper); }

.fine { font-size: 14px; color: var(--ink-soft); letter-spacing: 0.04em; }

.block { padding: 8vh 7vw; max-width: 1100px; margin: 0 auto; }

.section-lead { color: var(--ink-soft); max-width: 40em; }

.steps {
  list-style: none;
  padding: 0;
  margin: 40px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}

.steps h3 { font-size: 22px; margin: 8px 0; letter-spacing: 0.08em; }

.steps p { color: var(--ink-soft); margin: 0; font-size: 16.5px; }

.num {
  display: block;
  color: var(--cinnabar);
  letter-spacing: 0.3em;
  font-size: 15px;
}

.band {
  max-width: none;
  background: linear-gradient(var(--paper), var(--paper-deep));
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.band .split { max-width: 1100px; margin: 28px auto 0; }

.split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 6vw;
  align-items: start;
}

.split p { color: var(--ink-soft); margin: 0 0 1em; }

.facts { list-style: none; padding: 0; margin: 0; }

.facts li {
  display: flex;
  flex-direction: column;
  padding: 14px 0;
  border-top: 1px solid var(--rule);
}

.facts li:last-child { border-bottom: 1px solid var(--rule); }

.facts b { font-size: 22px; font-weight: 500; letter-spacing: 0.06em; }

.facts span { color: var(--ink-soft); font-size: 15px; }

.download { max-width: 860px; }

.slip {
  background: #fbf6ee;
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 48px 7%;
  box-shadow: 0 10px 40px rgba(26, 22, 18, 0.06);
}

.slip h2 { margin-bottom: 12px; }

.slip > p { color: var(--ink-soft); }

.install { color: var(--ink-soft); padding-left: 1.2em; font-size: 16.5px; }

.install li { margin: 6px 0; }

footer {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: center;
  padding: 6vh 7vw;
  border-top: 1px solid var(--rule);
}

.footer-brand img { width: 100%; height: auto; display: block; }

.colophon { font-size: 13.5px; line-height: 1.7; color: var(--ink-soft); }

.colophon p { margin: 0 0 0.6em; }

.colophon a { color: var(--gold); }

.copy { letter-spacing: 0.2em; }

@media (max-width: 800px) {
  .hero, .steps, .split, footer { grid-template-columns: 1fr; }
  .hero { padding-top: 3vh; }
  nav a:not(.nav-cta) { display: none; }
  .top { padding: 12px 5vw; }
  .slip { padding: 32px 6%; }
  footer { gap: 20px; }
  .footer-brand { max-width: 200px; }
}