:root{
  --bg:#f6f7f9; --card:#fff; --ink:#1f2430; --sub:#6b7280;
  --pri:#e2353b; --pri-dark:#b81f24; --line:#e6e8ec;
  --rakuten:#bf0000; --yahoo:#ff0033;
  --radius:14px; --shadow:0 1px 3px rgba(0,0,0,.08),0 8px 24px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Segoe UI","Hiragino Kaku Gothic ProN","Noto Sans JP",Meiryo,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}

.site-header{background:linear-gradient(135deg,var(--pri),var(--pri-dark));color:#fff;padding:22px 0}
.logo{font-size:1.5rem;font-weight:800;letter-spacing:.02em}
.tagline{margin:.3em 0 0;font-size:.9rem;opacity:.92}

.notice{background:#fff8e1;border:1px solid #f3d98a;border-radius:10px;padding:12px 16px;margin:18px 0;font-size:.9rem}
.notice code{background:#fcecd0;padding:1px 6px;border-radius:4px}

.tabs{display:flex;gap:8px;margin:22px 0 18px}
.tab{flex:1;text-align:center;padding:12px;background:var(--card);border:1px solid var(--line);border-radius:10px;font-weight:700;color:var(--sub)}
.tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}

.search-box{display:flex;gap:8px}
.search-box input{flex:1;padding:14px 16px;border:1px solid var(--line);border-radius:10px;font-size:1rem;background:#fff}
.search-box button{padding:0 22px;border:0;border-radius:10px;background:var(--pri);color:#fff;font-weight:800;font-size:1rem;cursor:pointer;white-space:nowrap}
.search-box button:hover{background:var(--pri-dark)}

/* filter bar */
.search-form{margin:8px 0 24px}
.search-form .search-box{margin:0 0 10px}
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:.9rem}
.filter-bar .f-item{display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.filter-bar input[type=number]{width:84px;padding:6px 8px;border:1px solid var(--line);border-radius:7px;font-size:.9rem}
.filter-bar select{padding:6px 8px;border:1px solid var(--line);border-radius:7px;font-size:.9rem;background:#fff}
.filter-bar input[type=checkbox]{width:16px;height:16px}
.ship-free{display:inline-block;margin-left:8px;font-size:.62rem;font-weight:700;color:#0a8a3f;background:#e6f7ee;border:1px solid #b6e6cb;border-radius:4px;padding:1px 5px;vertical-align:middle}
.card-specs{display:flex;flex-wrap:wrap;gap:4px;margin:2px 0 0}
.card-specs .spec{font-size:.66rem;font-weight:600;color:#3a4456;background:#eef1f6;border:1px solid #dfe4ec;border-radius:4px;padding:1px 6px}
.card-review{margin:2px 0 0;font-size:.74rem}
.card-review .stars{color:#f5a623;font-weight:700}
.card-review .rc{color:var(--sub)}

.lead,.results-head{margin:8px 0 16px}
.results-head{font-size:1.2rem;border-left:5px solid var(--pri);padding-left:10px}
.lead{color:var(--sub);font-weight:700;margin-top:26px}
.back a{color:var(--sub);font-size:.9rem}

.preset-group{margin:18px 0}
.preset-group h3{font-size:1.05rem;margin:0 0 10px}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:10px 18px;font-weight:600;box-shadow:var(--shadow);transition:.15s}
.chip:hover{border-color:var(--pri);color:var(--pri);transform:translateY(-1px)}

.kw-block{margin:8px 0 28px}
.kw-title{font-size:1rem;color:var(--sub);margin:0 0 10px;font-weight:700}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.15s}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 28px rgba(0,0,0,.12)}
.card-img{position:relative;aspect-ratio:1/1;background:#f0f1f3;display:flex;align-items:center;justify-content:center}
.card-img img{width:100%;height:100%;object-fit:contain}
.badge{position:absolute;top:8px;left:8px;font-size:.68rem;font-weight:800;color:#fff;padding:3px 8px;border-radius:999px}
.badge-rakuten{background:var(--rakuten)}
.badge-yahoo{background:var(--yahoo)}
.card-body{padding:10px 12px;display:flex;flex-direction:column;gap:4px;flex:1}
.card-title{font-size:.82rem;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.6em}
.card-price{font-size:1.2rem;font-weight:800;color:var(--pri);margin:0}
.card-shop{font-size:.72rem;color:var(--sub);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.empty{background:var(--card);border:1px dashed var(--line);border-radius:10px;padding:24px;text-align:center;color:var(--sub)}

.site-footer{margin-top:40px;background:#fff;border-top:1px solid var(--line);padding:20px 0;font-size:.8rem;color:var(--sub)}
.site-footer p{margin:.3em 0}

@media(max-width:520px){
  .grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
  .tagline{font-size:.8rem}
}