:root {
  --ink: #1C2B39;
  --ink-soft: #435361;
  --paper: #EDEEE4;
  --paper-raised: #E1E3D5;
  --paper-line: rgba(28,43,57,0.14);
  --accent: #C1432B;
  --accent-ink: #FBF4EE;
  --gold: #B5872C;
  --focus: #2E6E8E;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #EDEEE4;
    --ink-soft: #B7C0C6;
    --paper: #141B22;
    --paper-raised: #1D2731;
    --paper-line: rgba(237,238,228,0.16);
    --accent: #E2694A;
    --accent-ink: #241009;
    --gold: #D8AE5C;
    --focus: #6FB4D8;
  }
}
:root[data-theme="dark"] {
  --ink: #EDEEE4;
  --ink-soft: #B7C0C6;
  --paper: #141B22;
  --paper-raised: #1D2731;
  --paper-line: rgba(237,238,228,0.16);
  --accent: #E2694A;
  --accent-ink: #241009;
  --gold: #D8AE5C;
  --focus: #6FB4D8;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.display { font-family: "Shippori Mincho", "Hiragino Mincho ProN", serif; text-wrap: balance; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

.wrap { max-width: 640px; margin: 0 auto; padding: 0 clamp(20px, 6vw, 40px); }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(20px, 6vw, 40px);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--paper-line);
}
.topbar .brand { font-size: 0.88rem; letter-spacing: 0.04em; font-weight: 700; }
.brand-sep { color: var(--gold); }
.topbar-cta {
  display: inline-flex; align-items: center; height: 36px; padding: 0 16px;
  border-radius: 999px; background: var(--accent); color: var(--accent-ink);
  font-size: 0.82rem; font-weight: 700; text-decoration: none; letter-spacing: 0.04em;
}

.hero { padding: clamp(48px, 12vh, 96px) 0 clamp(40px, 8vh, 64px); }
.block { padding: clamp(48px, 10vh, 80px) 0; border-top: 1px solid var(--paper-line);
  background: radial-gradient(circle at 18% 22%, var(--paper-line) 0, transparent 1.6px) 0 0/34px 34px, var(--paper); }
.block.alt { background-color: var(--paper-raised); }

.hero-mark {
  display: inline-flex; align-items: center; gap: 10px; padding: 6px 14px 6px 10px;
  border: 1px solid var(--paper-line); border-radius: 999px;
  font-size: 0.82rem; letter-spacing: 0.08em; color: var(--ink-soft);
  margin-bottom: clamp(20px, 5vh, 32px);
}
.hero-mark .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

.eyebrow {
  display: flex; align-items: baseline; gap: 12px;
  font-size: 0.82rem; letter-spacing: 0.14em; color: var(--ink-soft);
  margin: 0 0 clamp(16px, 3vh, 24px);
}
.eyebrow .num { font-family: "Shippori Mincho", serif; font-size: 1.5rem; color: var(--gold); letter-spacing: 0; }

h1.display { font-size: clamp(1.9rem, 6vw, 3rem); line-height: 1.35; font-weight: 800; margin: 0 0 0.6em; }
h2.display { font-size: clamp(1.5rem, 4.2vw, 2.2rem); line-height: 1.4; font-weight: 700; margin: 0 0 0.7em; }
p { font-size: clamp(1rem, 2.4vw, 1.15rem); line-height: 1.9; color: var(--ink-soft); margin: 0 0 1em; }
.lede { font-size: clamp(1.05rem, 2.7vw, 1.3rem); color: var(--ink); }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: clamp(20px, 4vh, 32px); }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  padding: 0 24px; border-radius: 999px; border: 0;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 700; letter-spacing: 0.04em; text-decoration: none; font-size: 1rem;
}
.button.secondary { background: transparent; color: var(--ink); border: 1px solid var(--paper-line); }

ul.plain { list-style: none; margin: 0 0 1.2em; padding: 0; display: flex; flex-direction: column; gap: 16px; }
ul.plain li { display: flex; gap: 14px; align-items: flex-start; font-size: clamp(1rem, 2.4vw, 1.08rem); line-height: 1.75; color: var(--ink); }
ul.plain li svg { flex: none; width: 22px; height: 22px; margin-top: 3px; color: var(--accent); }

.grid-includes { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; margin: 1.4em 0 0; }
.grid-includes span { background: var(--paper-raised); border: 1px solid var(--paper-line); border-radius: 3px; padding: 10px 14px; font-size: 0.9rem; text-align: center; }
.block.alt .grid-includes span { background: var(--paper); }

.stamp-row { display: flex; align-items: center; gap: clamp(24px, 5vw, 44px); flex-wrap: wrap; margin: 0.6em 0 1.2em; }
.stamp {
  --s: clamp(148px, 28vw, 190px); width: var(--s); height: var(--s); border-radius: 50%;
  border: 3px solid var(--accent); color: var(--accent);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  transform: rotate(-6deg); flex: none; position: relative;
}
.stamp::before { content: ""; position: absolute; inset: 8px; border: 1px solid var(--accent); border-radius: 50%; opacity: 0.55; }
.stamp .yen { font-family: "Shippori Mincho", serif; font-weight: 800; font-size: clamp(1.5rem, 4.4vw, 2.1rem); line-height: 1.15; }
.stamp .unit { font-size: 0.82rem; letter-spacing: 0.04em; margin-top: 2px; }
.stamp .zero { font-size: 0.78rem; margin-top: 6px; letter-spacing: 0.04em; color: var(--ink-soft); }

.price-facts { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.price-facts li { font-size: clamp(1rem, 2.4vw, 1.1rem); display: flex; gap: 10px; color: var(--ink); }
.price-facts li::before { content: "・"; color: var(--gold); }

.note-card {
  margin-top: 1.4em; padding: 14px 18px; background: var(--paper);
  border-left: 3px solid var(--gold); border-radius: 2px; font-size: 0.95rem; color: var(--ink-soft);
}
.block.alt .note-card { background: var(--paper-raised); }

.panel-final { padding: clamp(56px, 12vh, 96px) 0; background: var(--ink); color: var(--paper); text-align: left; }
.panel-final .eyebrow, .panel-final p { color: color-mix(in srgb, var(--paper) 78%, transparent); }
.panel-final h2 { color: var(--paper); }

.qr-block { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; margin: 1.4em 0 1.6em; }
.qr-frame { background: #FBFAF4; padding: 14px; border-radius: 4px; border: 1px solid var(--paper-line); flex: none; }
.qr-frame canvas, .qr-frame img { display: block; width: 148px; height: 148px; }
.qr-caption { font-size: 0.95rem; color: color-mix(in srgb, var(--paper) 78%, transparent); }
.line-id { font-family: "Shippori Mincho", serif; letter-spacing: 0.04em; color: var(--paper); }

.footer { padding: 28px clamp(20px, 6vw, 40px) 48px; border-top: 1px solid var(--paper-line); }
.footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 0.85rem; color: var(--ink-soft); }
.footer a { text-decoration: underline; }

@media (max-width: 420px) {
  .stamp-row { gap: 18px; }
}