:root {
  --accent: #b33a2b;
  --accent-hover: #8f2c1f;
  --paper: #f7f4ec;
  --paper-card: #fffdf7;
  --ink: #23241f;
  --ink-soft: #6f6f64;
  --hair: rgba(35, 36, 31, 0.14);
  --serif: "Noto Serif JP", Georgia, "Yu Mincho", serif;
  --sans: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  background-image: radial-gradient(900px 460px at 50% -8%, #fffdf8 0%, rgba(255,253,248,0) 70%);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; }

/* ---- Top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px clamp(18px, 5vw, 48px);
  background: rgba(247, 244, 236, 0.86);
  -webkit-backdrop-filter: saturate(1.3) blur(10px);
  backdrop-filter: saturate(1.3) blur(10px);
  border-bottom: 1px solid var(--hair);
}
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; }
.brand-logo { display: block; }
.brand-name { font-family: var(--serif); font-weight: 600; font-size: 0.98rem; color: var(--ink); }
.brand-name em { color: var(--accent); font-style: normal; }
.topnav { display: flex; gap: clamp(14px, 4vw, 30px); }
.topnav a {
  text-decoration: none; color: var(--ink-soft);
  font-size: 0.82rem; letter-spacing: 0.02em;
}
.topnav a:hover { color: var(--accent); }

/* ---- Layout ---- */
main { max-width: 860px; margin: 0 auto; padding: 0 clamp(18px, 5vw, 48px); }
.section { padding: clamp(3.5rem, 9vw, 6rem) 0; border-top: 1px solid var(--hair); }
.eyebrow {
  font-family: var(--sans); font-size: 0.66rem; font-weight: 600;
  letter-spacing: 0.24em; text-transform: uppercase; color: var(--accent);
  margin: 0 0 1.8rem;
}

/* ---- Hero ---- */
.hero { text-align: center; padding: clamp(3.5rem, 11vw, 7rem) 0 clamp(2rem, 6vw, 3.5rem); }
.hero-crane { margin: 0 auto 1.6rem; display: block; }
.hero h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(2.1rem, 7vw, 3.4rem); line-height: 1.1;
  letter-spacing: 0.01em; margin: 0 auto 1.2rem; max-width: 16ch;
}
.hero-quiet { color: var(--ink-soft); }
.hero-sub {
  font-family: var(--serif); font-size: clamp(1rem, 3vw, 1.18rem);
  color: #3a3b34; line-height: 1.65; max-width: 46ch; margin: 0 auto;
}
.scroll-cue { color: var(--accent); opacity: 0.55; font-size: 1.2rem; margin: 2.6rem 0 0; }

/* ---- Approach (numbered) ---- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 2rem; }
.steps li { display: flex; gap: clamp(14px, 4vw, 30px); align-items: flex-start; }
.num {
  font-family: var(--serif); font-size: clamp(1.6rem, 5vw, 2.3rem);
  color: var(--accent); opacity: 0.55; line-height: 1; min-width: 2.2ch;
}
.steps h3 { font-family: var(--serif); font-weight: 600; font-size: 1.25rem; margin: 0 0 0.35rem; }
.steps p { margin: 0; color: var(--ink-soft); max-width: 52ch; }

/* ---- Offerings ---- */
.books { display: grid; gap: 1.4rem; }
.eyebrow + .offering { margin-top: 0; }
.offering {
  display: flex; gap: clamp(16px, 4vw, 28px); align-items: center;
  text-decoration: none; color: inherit;
  background: var(--paper-card); border: 1px solid var(--hair);
  border-radius: 14px; padding: clamp(16px, 3.5vw, 26px);
  transition: border-color 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}
a.offering:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(35,36,31,0.08); }
.offering-cover {
  width: clamp(84px, 22vw, 120px); height: auto; border-radius: 6px; flex: 0 0 auto;
  border: 1px solid rgba(35,36,31,0.08);
  box-shadow: 0 8px 20px rgba(35,36,31,0.16);
}
.offering-cover--placeholder {
  aspect-ratio: 2 / 3; display: flex; align-items: center; justify-content: center;
  background: repeating-linear-gradient(135deg, #efe7d8 0 10px, #eae1cf 10px 20px);
  color: var(--ink-soft); box-shadow: none; font-family: var(--serif); font-size: 1.1rem;
}
.offering-body { min-width: 0; }
.tag {
  display: inline-block; font-family: var(--sans); font-size: 0.64rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.5rem;
}
.tag--muted { color: var(--ink-soft); }
.offering h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(1.3rem, 4vw, 1.6rem); margin: 0 0 0.5rem; }
.offering p { margin: 0 0 0.7rem; color: var(--ink-soft); }
.offering-cta { font-family: var(--sans); font-size: 0.9rem; font-weight: 500; color: var(--accent); }
.offering--soon { opacity: 0.72; }

/* ---- Footer ---- */
.site-foot {
  max-width: 860px; margin: 0 auto; padding: clamp(2.6rem, 7vw, 4rem) clamp(18px, 5vw, 48px);
  border-top: 1px solid var(--hair); text-align: center;
}
.foot-brand { display: inline-flex; align-items: center; gap: 8px; font-family: var(--serif); font-weight: 600; }
.foot-mail { display: block; margin: 0.9rem 0 0.4rem; color: var(--accent); text-decoration: none; font-size: 0.92rem; }
.foot-mail:hover { text-decoration: underline; }
.foot-copy { font-size: 0.76rem; letter-spacing: 0.04em; color: #9a9a8e; margin-top: 0.7rem; }

@media (max-width: 560px) {
  .offering { flex-direction: column; text-align: center; align-items: center; }
  .offering p { max-width: 40ch; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a.offering:hover { transform: none; }
}