@import url('https://fonts.googleapis.com/css2?family=Zen+Old+Mincho:wght@500;700&family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

:root {
  --ink: #17191c;
  --paper: #faf8f4;
  --paper-2: #f1ede4;
  --line: #ddd7c9;
  --accent: #b5452c;
  --muted: #8a8477;
  --radius: 2px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---- header ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,248,244,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px;
  max-width: 1120px; margin: 0 auto;
}
.brand {
  font-family: 'Zen Old Mincho', serif;
  font-size: 22px;
  letter-spacing: 0.08em;
}
.brand small {
  display: block;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 10px;
  letter-spacing: 0.25em;
  color: var(--muted);
  font-weight: 400;
  margin-top: 2px;
}
.nav { display: flex; gap: 28px; font-size: 13px; letter-spacing: 0.05em; }
.nav a { color: var(--muted); transition: color .15s; }
.nav a:hover { color: var(--ink); }
.header-icons { display: flex; gap: 16px; align-items: center; flex: none; }
.icon-btn { width: 20px; height: 20px; color: var(--ink); }

.migration-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; letter-spacing: 0.08em; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}

@media (max-width: 760px) {
  .header-inner { flex-wrap: wrap; gap: 10px 16px; padding: 14px 16px; }
  .brand { font-size: 18px; }
  .nav { order: 3; width: 100%; gap: 18px; overflow-x: auto; }
  .migration-badge { display: none; }
}

/* ---- hero ---- */
.hero {
  padding: 64px 24px 48px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}
.hero h1 {
  font-family: 'Zen Old Mincho', serif;
  font-size: 34px;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.hero p {
  color: var(--muted);
  font-size: 14px;
  max-width: 480px;
  margin: 0 auto;
}

/* ---- notice bar ---- */
.notice {
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
  padding: 10px 16px;
  letter-spacing: 0.02em;
}
.notice b { color: var(--ink); font-weight: 500; }

/* ---- product grid ---- */
.section-title {
  font-family: 'Zen Old Mincho', serif;
  font-size: 20px;
  letter-spacing: 0.06em;
  margin: 56px 0 24px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 28px 20px;
  padding-bottom: 64px;
}
.card { position: relative; }
.card-img {
  position: relative;
  aspect-ratio: 1 / 1;
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
  margin-bottom: 12px;
}
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.card:hover .card-img img { transform: scale(1.04); }
.badge-sold {
  position: absolute; top: 10px; left: 10px;
  background: var(--ink); color: var(--paper);
  font-size: 10px; letter-spacing: 0.1em;
  padding: 4px 9px;
}
.badge-instock {
  position: absolute; top: 10px; left: 10px;
  background: var(--accent); color: #fff;
  font-size: 10px; letter-spacing: 0.1em;
  padding: 4px 9px;
}
.card-title { font-size: 13.5px; font-weight: 500; line-height: 1.5; }
.card-meta { font-size: 11.5px; color: var(--muted); margin-top: 3px; }
.card-price { font-size: 13.5px; margin-top: 6px; font-weight: 500; }

/* ---- footer ---- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 24px 60px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}
.site-footer .links { margin-top: 10px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---- product detail ---- */
.breadcrumb { font-size: 12px; color: var(--muted); padding: 20px 0 0; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }

.pd-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  padding: 28px 0 72px;
}
@media (max-width: 760px) { .pd-layout { grid-template-columns: 1fr; gap: 28px; } }

.pd-img {
  border: 1px solid var(--line);
  background: #fff;
  aspect-ratio: 1/1;
  position: relative;
  overflow: hidden;
}
.pd-img img { width: 100%; height: 100%; object-fit: cover; }

.pd-condition {
  display: inline-block;
  font-size: 11px; letter-spacing: 0.06em; color: var(--muted);
  border: 1px solid var(--line); padding: 3px 9px; margin-bottom: 14px;
}
.pd-title { font-size: 22px; font-weight: 500; line-height: 1.5; margin-bottom: 4px; }
.pd-meta { font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.pd-price { font-size: 24px; font-weight: 500; margin-bottom: 22px; }
.pd-desc { font-size: 13.5px; color: #4a463e; margin-bottom: 28px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 100%; padding: 15px; font-size: 13px; letter-spacing: 0.1em;
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper);
  cursor: pointer; transition: opacity .15s;
}
.btn:hover { opacity: .85; }
.btn[disabled] {
  background: transparent; color: var(--muted); border-color: var(--line);
  cursor: not-allowed;
}

/* ---- audio preview block (the key upgrade) ---- */
.preview-block { margin-top: 30px; }
.preview-label {
  font-size: 11px; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.preview-label .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

.player {
  display: flex; align-items: center; gap: 14px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 14px 16px;
}
.play-btn {
  flex: none;
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--ink); color: var(--paper);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; border: none;
}
.play-btn svg { width: 16px; height: 16px; }
.player-body { flex: 1; min-width: 0; }
.player-track { font-size: 12px; color: var(--muted); margin-bottom: 6px; display: flex; justify-content: space-between; gap: 8px; }
.player-bar {
  position: relative; height: 3px; background: var(--line); cursor: pointer; border-radius: 2px;
}
.player-bar-fill {
  position: absolute; top:0; left:0; height: 100%; width: 0%;
  background: var(--accent); border-radius: 2px;
}

/* ---- before/after compare ---- */
.compare {
  margin-top: 16px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
@media (max-width: 480px) { .compare { grid-template-columns: 1fr; } }
.compare-col {
  border: 1px dashed var(--line); padding: 14px; font-size: 11.5px;
}
.compare-col.old { color: var(--muted); }
.compare-col .tag { display:block; font-size: 10px; letter-spacing: 0.1em; margin-bottom: 8px; }
.compare-col.old .tag { color: var(--muted); }
.compare-col.new .tag { color: var(--accent); }
.old-link {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line); padding: 6px 10px; font-size: 11.5px; color: var(--muted);
}