:root{--bg:#f6f7f9;--card:#fff;--ink:#17191c;--muted:#68707a;--line:#e3e6ea;--accent:#1769e0;--ok:#0b7a45}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif}
a{color:inherit}header,main,footer{max-width:980px;margin:auto;padding-left:18px;padding-right:18px}
header{padding-top:28px;padding-bottom:12px}.brand{font-weight:900;font-size:29px;text-decoration:none}.tag{color:var(--muted);margin-top:4px}
main{padding-top:8px;padding-bottom:60px}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;margin:12px 0;box-shadow:0 2px 12px rgba(0,0,0,.03)}
h1{font-size:26px;margin:0 0 8px}h2{font-size:19px;margin:0 0 14px}.lead,.note,.disclaimer{color:var(--muted);line-height:1.75}.disclaimer{font-size:12px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.field label{display:block;font-size:13px;font-weight:800;margin-bottom:6px}
.field input,.field select{width:100%;padding:13px;border:1px solid #cfd4da;border-radius:11px;background:#fff;font-size:16px}
button.calc{width:100%;border:0;background:var(--accent);color:white;font-weight:900;font-size:16px;padding:14px;border-radius:12px;margin-top:14px;cursor:pointer}
.preference-block{margin-top:18px;padding-top:17px;border-top:1px solid var(--line)}.preference-block h2{font-size:16px;margin-bottom:11px}.preference-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.preference-help{margin:9px 0 0;color:var(--muted);font-size:12px;line-height:1.65}
.result{display:none}.result.show{display:block}.big{font-size:32px;font-weight:900}.pill{display:inline-block;padding:7px 10px;border-radius:999px;background:#e9f2ff;color:#174b8f;font-weight:800;margin:6px 5px 0 0}
.reason{line-height:1.8}.products{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.product{border:1px solid var(--line);border-radius:14px;padding:14px}
.product img{width:100%;aspect-ratio:1/1;object-fit:contain;background:#fafafa;border-radius:10px}.product h3{font-size:14px;line-height:1.55;min-height:44px}.price{font-size:19px;font-weight:900}
.buy{display:block;text-decoration:none;text-align:center;background:#bf0000;color:#fff;font-weight:900;padding:11px;border-radius:10px;margin-top:10px}.badge{font-size:12px;font-weight:900;color:var(--ok)}
.product-condition{grid-column:1/-1;margin:0;padding:11px 13px;border-radius:11px;background:#eef5ff;color:#244d7d;font-size:13px;line-height:1.6}
.amazon-option{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 17px;border:1px solid #e1c35c;border-radius:14px;background:#fff9df}.amazon-option strong,.amazon-option small{display:block}.amazon-option strong{font-size:16px;margin-top:3px}.amazon-option small{color:var(--muted);line-height:1.55;margin-top:4px}.amazon-label{color:#7a5900;font-size:12px;font-weight:900}.amazon-buy{flex:0 0 auto;min-width:180px;text-decoration:none;text-align:center;background:#ffd814;color:#111820;border:1px solid #f0b800;font-weight:900;padding:12px 15px;border-radius:10px}.affiliate-disclosure{font-size:11px;line-height:1.6}
.tools{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.tool{display:block;text-decoration:none;background:#fff;border:1px solid var(--line);border-radius:15px;padding:17px}.tool strong{display:block;font-size:17px;margin-bottom:7px}.tool span{color:var(--muted);font-size:13px;line-height:1.55}
.breadcrumb{font-size:13px;color:var(--muted);margin:6px 0 12px}.hero{padding-top:8px}
footer{padding-bottom:40px;color:var(--muted);font-size:12px;line-height:1.7}
@media(max-width:720px){.grid,.products,.tools,.preference-grid{grid-template-columns:1fr}.brand{font-size:25px}.preference-block{margin-top:16px}.product-condition{margin-bottom:1px}.amazon-option{display:block}.amazon-buy{display:block;width:100%;margin-top:13px}}