:root{
  --bg:#fafafa; --fg:#1a1a1a; --muted:#6b6b6b; --line:#e0e0e0;
  --card:#ffffff; --accent:#2b2b2b; --maxw:1100px;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;color:var(--fg);background:var(--bg);line-height:1.6;word-break:keep-all;overflow-wrap:break-word}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.site-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(250,250,250,.92);backdrop-filter:blur(6px);z-index:10}
.site-header .brand{display:flex;align-items:center;font-weight:700;letter-spacing:.04em}
.brand-logo{height:40px;width:auto;display:block}
.nav a{margin-left:18px;color:var(--muted);font-size:14px}
.nav a:hover{color:var(--fg)}
.cart-badge{display:inline-block;min-width:18px;padding:0 6px;border-radius:10px;background:var(--accent);color:#fff;font-size:12px;text-align:center;margin-left:6px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.card img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}
.card .body{padding:12px}
.card .name{font-size:14px;font-weight:600}
.card .price{margin-top:4px;font-size:15px}
.card .pieces{color:var(--muted);font-size:12px}
.section-title{font-size:20px;font-weight:700;margin:28px 0 12px}
.btn{display:inline-block;padding:12px 18px;background:var(--accent);color:#fff;border:0;border-radius:8px;font-size:15px;cursor:pointer}
.btn.secondary{background:#fff;color:var(--fg);border:1px solid var(--line)}
.swatches{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.swatch{width:38px;height:38px;border-radius:8px;border:2px solid transparent;cursor:pointer;position:relative;background-size:cover}
.swatch.selected{border-color:var(--fg)}
.swatch .tag{position:absolute;bottom:-16px;left:0;right:0;font-size:10px;color:var(--muted);text-align:center}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.detail-grid>div{min-width:0}
@media(max-width:680px){.detail-grid{grid-template-columns:1fr}}
.site-footer{margin-top:48px;border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:13px}
.site-footer a{margin-right:14px}
table.cart{width:100%;border-collapse:collapse}
table.cart th,table.cart td{padding:10px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
.totals{margin-top:16px;max-width:320px;margin-left:auto}
.totals .row{display:flex;justify-content:space-between;padding:6px 0}
.totals .grand{font-weight:700;font-size:18px;border-top:1px solid var(--line);margin-top:6px;padding-top:10px}
.form-field{margin:14px 0}
.form-field label{display:block;font-size:14px;margin-bottom:4px}
.form-field input,.form-field textarea{width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;font-size:15px}
.checkbox-field label{display:flex;align-items:center;gap:8px;font-size:14px;cursor:pointer}
.checkbox-field input{width:auto}
.error{color:#c0392b;font-size:13px;margin-top:4px}
.hero{padding:48px 0;text-align:center}
.hero-logo{height:120px;width:auto;margin:0 auto 20px;display:block}
.hero h1{font-size:28px;margin:0 0 8px}
.hero p{color:var(--muted);margin:4px 0}

.legal table{width:100%;border-collapse:collapse;margin:16px 0 28px}
.legal table th,.legal table td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
.legal table th{width:180px;color:var(--muted);font-weight:600;white-space:nowrap}
.legal table td{white-space:pre-line}
.legal h2{font-size:17px;margin:28px 0 8px}
.legal p{font-size:14px;color:var(--muted);line-height:1.8}
@media(max-width:560px){.legal table th{width:110px;font-size:12px}.legal table td{font-size:13px}}

.notice{background:#f5f5f5;border:1px solid var(--line);border-radius:10px;padding:12px 16px;color:var(--muted);font-size:13px;margin:4px 0 24px}
.notice strong{color:var(--fg)}
.series-desc{color:var(--muted);font-size:14px;margin:-4px 0 16px;max-width:640px}

/* 購入フロー インフォグラフィック */
.flow{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:8px 0 28px}
.flow .flow-note{color:var(--muted);font-size:13px;margin:0 0 18px}
.flow .flow-note strong{color:var(--fg)}
.flow-steps{list-style:none;margin:0;padding:0;position:relative}
.flow-step{position:relative;display:flex;gap:14px;padding:0 0 22px 0}
.flow-step:last-child{padding-bottom:0}
.flow-step::before{content:"";position:absolute;left:17px;top:36px;bottom:-2px;width:2px;background:var(--line)}
.flow-step:last-child::before{display:none}
.flow-icon{flex:0 0 auto;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#f1f1f1;border:1px solid var(--line);position:relative;z-index:1}
.flow-icon svg{width:18px;height:18px;stroke:#444;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.flow-step.hazama .flow-icon{background:var(--accent);border-color:var(--accent)}
.flow-step.hazama .flow-icon svg{stroke:#fff}
.flow-body{flex:1;padding-top:1px}
.flow-actor{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.04em;padding:2px 8px;border-radius:999px;margin-bottom:3px}
.flow-actor.you{background:#eef3f8;color:#2d5a86;border:1px solid #d3e1ee}
.flow-actor.hz{background:#2b2b2b;color:#fff}
.flow-title{font-weight:600;font-size:15px}
.flow-title .num{color:var(--muted);font-weight:700;margin-right:6px}
.flow-desc{color:var(--muted);font-size:13px;margin-top:2px}

/* シリーズ切り替えボタン */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 4px}
.filter-btn{padding:8px 16px;border:1px solid var(--line);background:#fff;border-radius:999px;font-size:14px;cursor:pointer;color:var(--fg)}
.filter-btn:hover{border-color:var(--fg)}
.filter-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}

@media(max-width:560px){
  .nav a{margin-left:12px}
  .hero-logo{height:88px}
  .hero h1{font-size:22px}
  .flow{padding:18px 16px}
  .grid{grid-template-columns:1fr 1fr;gap:12px}
  .card .name{font-size:13px}
  .card .price{font-size:14px}
}