:root{
  --bg: #FAF6F0;
  --card-bg: #FFFFFF;
  --wood-light: #D9AE7E;
  --wood-dark: #B8895E;
  --cream-deep: #EFE3D2;
  --ink: #3E2E23;
  --sub-ink: #7A6A5D;
  --dot: #E85D4E;
  --near-black: #15110E;
  --shadow: 0 4px 20px rgba(62,46,35,0.08);
}
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: "M PLUS 1p", "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  overflow-x: hidden;
}

/* ---------- bilingual text treatment ----------
   JA is the primary line: bold, full-size, dark ink.
   EN sits right under it: smaller, wider letter-spacing, muted color,
   reading like a caption/translation rather than a second headline. */
.bi{ display:flex; flex-direction:column; }
.ja{ color: var(--ink); }
.en{
  color: var(--sub-ink);
  font-size: 0.62em;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-top: 0.35em;
}
h1 .en, h2 .en{
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}

a{ color: inherit; text-decoration: none; }

/* ---------- topbar ---------- */
.topbar{
  position: relative;
  display:flex;
  align-items:center;
  justify-content: center;
  max-width: 1080px;
  margin: 0 auto;
  padding: 22px 24px 0;
}
.brand{ display:flex; align-items:center; gap:14px; }
.brand-mark{ border-radius: 12px; flex-shrink:0; }
.brand-name{ font-weight:700; font-size: 1.6rem; letter-spacing: 0.02em; }
.nav-cta{
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display:flex; flex-direction:column; align-items:center; text-align:center;
  background: var(--ink);
  color:#fff;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight:800;
  line-height:1.3;
  box-shadow: 0 3px 10px rgba(62,46,35,0.25);
}
.nav-cta .ja{ color:#fff; }
.nav-cta .en{ color: var(--wood-light); font-size:0.68em; margin-top:0.15em; font-weight:700; }

/* ---------- layout helpers ---------- */
main{ max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.section-title{
  text-align:center;
  align-items:center;
  font-size: 1.7rem;
  font-weight:900;
  margin: 0 0 40px;
}
.section-title .en{ font-size:0.42em; }

/* ---------- hero ---------- */
.hero{
  display:flex;
  flex-direction: column;
  align-items:center;
  text-align:center;
  padding: 64px 0 72px;
}
.hero-copy{ max-width: 620px; display:flex; flex-direction:column; align-items:center; }
.eyebrow{ align-items:center; }
.eyebrow{
  display:flex; flex-direction:column;
  font-size: 0.78rem;
  font-weight:700;
  color: var(--dot);
  margin: 0 0 18px;
}
.eyebrow .en{ color: var(--wood-dark); font-size:0.85em; letter-spacing:0.08em; margin-top:0.2em; }
h1{
  font-size: 2.5rem;
  line-height:1.25;
  font-weight:900;
  margin: 0 0 22px;
  text-align:center;
}
h1 .ja{ display:block; }
h1 .en{ display:block; font-size:0.4em; line-height:1.5; margin-top:0.6em; }
.lede{ font-size: 1rem; line-height:1.85; color: var(--ink); margin: 0 0 30px; max-width: 480px; text-align:center; align-items:center; }
.lede .en{ font-size: 0.85em; color: var(--sub-ink); }

.cta-button{
  display:inline-flex; flex-direction:column; align-items:center; text-align:center;
  background: var(--dot);
  color:#fff;
  padding: 15px 32px;
  border-radius: 14px;
  font-weight:700;
  font-size: 1.02rem;
  box-shadow: 0 6px 18px rgba(232,93,78,0.35);
  transition: transform .15s, box-shadow .15s;
}
.cta-button:hover{ transform: translateY(-2px); box-shadow: 0 10px 24px rgba(232,93,78,0.42); }
.cta-button .en{ color: rgba(255,255,255,0.85); font-size:0.62em; margin-top:0.25em; }

/* ---------- features ---------- */
.features{ padding: 40px 0 64px; }
.feature-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}
.feature-card{
  background: var(--card-bg);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 26px 22px;
}
.feature-icon{ font-size: 1.6rem; margin-bottom: 12px; }
.feature-card h3{ font-size: 1.02rem; font-weight:700; margin: 0 0 10px; }
.feature-card h3 .en{ font-size:0.6em; color: var(--wood-dark); }
.feature-card p{ margin:0; font-size: 0.88rem; line-height:1.7; color: var(--ink); }
.feature-card p .en{ font-size:0.85em; color: var(--sub-ink); }

/* ---------- how to use ---------- */
.howto{ padding: 24px 0 70px; }
.steps{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 30px;
  position: relative;
}
.step{ text-align:center; padding: 0 8px; }
.step-num{
  width: 44px; height:44px;
  border-radius:50%;
  background: var(--ink);
  color: var(--wood-light);
  font-weight:900;
  font-size: 1.1rem;
  display:flex; align-items:center; justify-content:center;
  margin: 0 auto 16px;
}
.step h3{ font-size: 0.98rem; font-weight:700; margin: 0 0 10px; display:flex; flex-direction:column; }
.step h3 .en{ font-size:0.62em; color: var(--wood-dark); }
.step p{ margin:0; font-size: 0.85rem; line-height:1.7; color: var(--ink); display:flex; flex-direction:column; }
.step p .en{ font-size:0.85em; color: var(--sub-ink); }

/* ---------- final CTA ---------- */
.final-cta{
  text-align:center;
  background: var(--near-black);
  color: #fff;
  border-radius: 28px;
  padding: 56px 24px;
  margin-bottom: 70px;
}
.final-cta h2{ font-size: 1.6rem; font-weight:900; margin:0 0 14px; align-items:center; }
.final-cta h2 .ja{ color: #fff; }
.final-cta h2 .en{ font-size:0.45em; color: var(--wood-light); }
.final-cta p{ margin: 0 0 30px; align-items:center; font-size:0.95rem; }
.final-cta p .ja{ color: #EFE3D2; }
.final-cta p .en{ color: #B39A82; font-size:0.85em; }
.final-cta .cta-button{ background: var(--dot); }

/* ---------- footer ---------- */
.site-footer{
  text-align:center;
  padding: 0 24px 40px;
  color: var(--sub-ink);
  font-size: 0.75rem;
}
.site-footer .bi{ align-items:center; }
.site-footer .en{ font-size:0.9em; margin-top:0.3em; }

/* ---------- responsive ---------- */
@media (max-width: 720px){
  h1{ font-size: 1.9rem; }
  .hero{ padding: 32px 0 48px; }
  .lede{ margin-left:auto; margin-right:auto; }
  .eyebrow{ align-items:center; }
  .final-cta{ border-radius: 20px; }
}

@media (max-width: 480px){
  .topbar{ flex-direction: column; gap: 14px; padding-top: 18px; }
  .nav-cta{ position: static; transform:none; }
  .brand-name{ font-size: 1.15rem; }
}