:root{--bg:#f6f8fc;--panel:#fff;--ink:#182033;--muted:#667085;--line:#dfe4ec;--brand:#3158e5;--brand2:#6b4ad8;--ok:#08754b;--warn:#a55a00;--bad:#a61c35;--radius:18px;--shadow:0 12px 30px rgba(23,32,51,.08);--max:1120px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:var(--brand);text-underline-offset:.17em}button,input,select{font:inherit}button{cursor:pointer}.wrap{width:min(calc(100% - 32px),var(--max));margin:auto}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-inner{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:900}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:linear-gradient(135deg,var(--brand),#7f58e8);color:#fff}.brand small{display:block;color:var(--muted);font-size:10px;line-height:1.1}.header-nav{display:flex;gap:15px;align-items:center}.header-nav a{font-size:13px;color:#344054;text-decoration:none;font-weight:800}.hero{padding:44px 0 24px}.hero h1,.category-hero h1{font-size:clamp(32px,5.5vw,54px);line-height:1.08;letter-spacing:-.035em;margin:14px 0}.hero .lead,.category-hero p{max-width:850px;color:#475467;font-size:clamp(16px,2.2vw,20px)}.eyebrow{display:inline-flex;padding:6px 11px;border-radius:999px;background:#eef2ff;border:1px solid #d4ddff;color:#2949bd;font-size:12px;font-weight:900}.hero-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.pill{padding:7px 10px;border:1px solid var(--line);background:#fff;border-radius:999px;font-size:13px;font-weight:800;color:#475467}.main-grid{display:grid;grid-template-columns:minmax(0,1.28fr) minmax(280px,.72fr);gap:22px;margin:16px auto 42px;align-items:start}.panel,.content-card,.hub-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.tool{padding:22px}.tool h2{margin:0 0 5px}.section-note{color:var(--muted);margin:0 0 17px;font-size:14px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:13px;font-weight:850;color:#344054}.field input,.field select{min-height:48px;width:100%;padding:10px 12px;border:1px solid #cfd6e2;border-radius:12px;background:white;outline:none}.field input:focus,.field select:focus{border-color:#8097ee;box-shadow:0 0 0 3px rgba(49,88,229,.11)}.inline{display:grid;grid-template-columns:1fr 130px;gap:8px}.btn{min-height:46px;border:0;border-radius:12px;padding:10px 15px;font-weight:900;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;gap:6px}.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}.btn-secondary{background:#eef2ff;color:#2949bd}.btn-ghost{background:#fff;border:1px solid var(--line);color:#344054}.btn-amazon{background:#172033;color:#fff;width:100%;margin-top:10px}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}.result{margin-top:18px;padding:18px;border:1px solid #d9e2ff;background:linear-gradient(145deg,#f8faff,#eef4ff);border-radius:16px}.result-empty{text-align:center;color:var(--muted);padding:26px 10px}.result-main{font-size:34px;line-height:1.1;font-weight:950;color:#223a9b}.result-main small{font-size:14px;color:#53627b}.metrics,.special-result{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}.metric,.special-result .box{background:#fff;border:1px solid #dfe5f4;border-radius:13px;padding:12px}.metric span,.special-result small{display:block;font-size:12px;color:var(--muted);font-weight:800}.metric strong,.special-result strong{display:block;margin-top:2px;font-size:19px}.compare{margin-top:12px;padding:11px 12px;border-radius:12px;font-weight:850}.compare.good{background:#e9f8f1;color:var(--ok)}.compare.bad{background:#fff0f2;color:var(--bad)}.compare.same{background:#f2f4f7;color:#475467}.affiliate-note{font-size:11px;color:#667085;margin:8px 0 0}.side-stack{display:grid;gap:16px}.side-card{padding:18px}.side-card h2{margin:0 0 8px;font-size:18px}.side-card ul{margin:8px 0;padding-left:20px}.history-list{display:grid;gap:8px}.history-item{border:1px solid var(--line);border-radius:13px;padding:11px}.history-item-head{display:flex;justify-content:space-between;gap:8px}.history-actions{display:flex;gap:7px;margin-top:8px}.history-actions button{border:1px solid var(--line);background:#f8fafc;border-radius:9px;padding:6px 9px}.section{padding:18px 0 48px}.section-head{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:16px}.section-head h2{margin:0;font-size:clamp(25px,4vw,36px);letter-spacing:-.025em}.section-head p{margin:0;color:var(--muted)}.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.category-card,.tool-card{display:block;background:#fff;border:1px solid var(--line);border-radius:17px;padding:17px;text-decoration:none;color:var(--ink);box-shadow:0 7px 18px rgba(23,32,51,.04);transition:.16s}.category-card:hover,.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.category-card .icon,.tool-card .icon{font-size:25px}.category-card h3,.tool-card h3{margin:8px 0 4px;font-size:17px}.category-card p,.tool-card p{margin:0;color:var(--muted);font-size:13px}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:22px}.content-card{padding:26px}.content-card h2{font-size:27px;line-height:1.35;margin:32px 0 8px}.content-card h2:first-child{margin-top:0}.content-card h3{margin:23px 0 6px}.content-card p,.content-card li{color:#475467}.content-card table{width:100%;border-collapse:collapse;margin:15px 0;font-size:14px}.content-card th,.content-card td{padding:10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.content-card th{background:#f8fafc}.content-card .callout{background:#f6f8ff;border-left:4px solid var(--brand);padding:13px 15px;border-radius:0 12px 12px 0}.toc{position:sticky;top:82px;padding:18px}.toc strong{display:block;margin-bottom:6px}.toc a{display:block;padding:5px 0;text-decoration:none;font-size:13px;color:#475467}.breadcrumbs{font-size:12px;color:var(--muted);padding-top:18px}.breadcrumbs a{color:#667085}.category-hero{padding:22px 0 14px}.category-hero h1{font-size:clamp(31px,5vw,48px)}.notice{padding:12px 14px;border-radius:12px;background:#fff9e8;border:1px solid #f0dfab;color:#7a5310;font-size:13px}.faq{display:grid;gap:10px}.faq details{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff}.faq summary{font-weight:850;cursor:pointer}.faq p{margin:8px 0 0}.hub-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.hub-card{padding:20px}.hub-card h3{margin-top:0}.hub-card ul{padding-left:20px}.quick-links{display:flex;flex-wrap:wrap;gap:8px}.quick-links a{padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:#fff;text-decoration:none;font-size:13px}.site-footer{border-top:1px solid var(--line);background:#fff;padding:34px 0 44px}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:24px}.footer-brand{font-weight:950;font-size:18px}.footer-grid p{color:var(--muted);font-size:13px}.footer-links a{display:block;padding:3px 0;color:#475467;text-decoration:none;font-size:13px}.disclosure{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:#667085}.scanner{position:fixed;inset:0;z-index:100;background:rgba(5,10,25,.76);display:none;align-items:center;justify-content:center;padding:18px}.scanner.open{display:flex}.scanner-card{width:min(100%,520px);background:#fff;border-radius:20px;padding:16px}.scanner-head{display:flex;justify-content:space-between;align-items:center}.scanner-close{width:40px;height:40px;border:0;background:#f2f4f7;border-radius:12px}.scanner-reader{min-height:300px;background:#111;border-radius:14px;overflow:hidden}.toast{position:fixed;left:50%;bottom:24px;z-index:110;transform:translate(-50%,20px);background:#172033;color:#fff;padding:10px 14px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:200;background:#fff;padding:10px}.muted{color:var(--muted)}.positive{color:var(--ok)}.negative{color:var(--bad)}
@media(max-width:900px){.main-grid,.content-grid{grid-template-columns:1fr}.card-grid{grid-template-columns:repeat(2,1fr)}.toc{position:static}.footer-grid{grid-template-columns:1fr 1fr}.hub-grid{grid-template-columns:1fr}}
@media(max-width:600px){.wrap{width:min(calc(100% - 20px),var(--max))}.site-header{position:static}.header-inner{min-height:58px}.header-nav{gap:9px}.header-nav a{font-size:12px}.header-nav a:nth-child(2){display:none}.hero{padding-top:28px}.hero h1{font-size:37px}.tool{padding:16px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.inline{grid-template-columns:1fr 106px}.actions{grid-template-columns:1fr}.metrics,.special-result{grid-template-columns:1fr 1fr}.card-grid{grid-template-columns:1fr 1fr;gap:10px}.category-card,.tool-card{padding:14px}.content-card{padding:18px}.footer-grid{grid-template-columns:1fr}.result-main{font-size:29px}}
@media(max-width:390px){.card-grid,.metrics,.special-result{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.editorial-meta{margin:0 0 20px;padding:10px 12px;border-radius:12px;background:#f8fafc;border:1px solid var(--line);font-size:12px;color:#667085}.editorial-meta a{font-weight:800}.related-links{margin-top:10px}.guide-amazon-cta{margin-top:28px}.guide-amazon-cta h2{margin-top:0!important;font-size:21px!important}.guide-amazon-cta .btn-amazon{max-width:520px}.article-body{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}.article-body h2{font-size:27px;line-height:1.35;margin:0 0 8px}.article-body p{color:#475467}

/* v1.4.0: repeat-use / shopping mode */
.price-hero{padding:18px;border:1px solid #cdd9ff;border-radius:18px;background:linear-gradient(135deg,#eef3ff,#fff);box-shadow:var(--shadow);margin:0 0 18px}.price-hero h2{margin:0 0 4px;font-size:23px}.price-hero p{margin:0;color:#53627b}.price-status{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:13px}.price-status .stat{background:#fff;border:1px solid #dfe5f4;border-radius:13px;padding:11px}.price-status small{display:block;color:var(--muted);font-size:11px;font-weight:800}.price-status strong{display:block;font-size:18px;margin-top:2px}.history-compare{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}.history-compare .hc{border:1px solid #dfe5f4;background:#fff;border-radius:12px;padding:10px}.history-compare small{display:block;color:#667085;font-size:11px;font-weight:800}.history-compare strong{display:block;font-size:16px}.shop-mode-link{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 16px;border-radius:16px;text-decoration:none;background:#172033;color:#fff;margin-top:14px}.shop-mode-link strong{font-size:17px}.shop-mode-link span{font-size:12px;color:#c7d1e4}.shopping-body{background:#eef2f7}.shopping-shell{width:min(calc(100% - 20px),720px);margin:auto;padding:12px 0 86px}.shopping-top{position:sticky;top:0;z-index:40;background:rgba(238,242,247,.96);backdrop-filter:blur(10px);padding:8px 0}.shopping-top-inner{display:flex;justify-content:space-between;align-items:center;gap:10px}.shopping-top a{text-decoration:none;font-weight:900}.shopping-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:var(--shadow);margin-top:10px}.shopping-card h1{font-size:25px;line-height:1.2;margin:0 0 6px}.shopping-card .form-grid{gap:10px}.shopping-result .result-main{font-size:38px}.shopping-bottom{position:fixed;z-index:50;bottom:0;left:0;right:0;background:rgba(255,255,255,.97);border-top:1px solid var(--line);padding:8px 10px env(safe-area-inset-bottom)}.shopping-bottom-inner{width:min(100%,720px);margin:auto;display:grid;grid-template-columns:1fr 1fr;gap:8px}.pricebook-tools{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.pricebook-tools input{min-height:44px;border:1px solid var(--line);border-radius:11px;padding:8px 11px;min-width:220px;flex:1}.pricebook-list{display:grid;gap:12px}.pricebook-item{background:#fff;border:1px solid var(--line);border-radius:15px;padding:14px}.pricebook-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.pricebook-head h3{margin:0;font-size:17px}.pricebook-head small{color:var(--muted)}.pricebook-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}.pricebook-metrics div{background:#f8fafc;border-radius:10px;padding:9px}.pricebook-metrics small{display:block;color:var(--muted);font-size:10px;font-weight:800}.pricebook-metrics strong{display:block}.pricebook-records{margin-top:10px;border-top:1px solid var(--line);padding-top:7px}.pricebook-record{display:flex;justify-content:space-between;gap:12px;padding:5px 0;font-size:12px;color:#475467}.decision-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.decision-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:15px;text-decoration:none;color:var(--ink)}.decision-card h3{margin:4px 0;font-size:16px}.decision-card p{font-size:12px;color:var(--muted);margin:0}.mini-kicker{font-size:10px;color:#4c64bd;font-weight:900;letter-spacing:.05em}.sticky-quick{position:sticky;bottom:10px;z-index:20;margin-top:12px}.install-hint{margin-top:10px;font-size:12px;color:#667085}.mode-badge{display:inline-flex;align-items:center;gap:5px;background:#eaf8f1;color:#08754b;border-radius:999px;padding:5px 8px;font-size:11px;font-weight:900}
@media(max-width:700px){.price-status,.history-compare,.pricebook-metrics,.decision-grid{grid-template-columns:1fr}.shopping-result .result-main{font-size:32px}.shopping-card{padding:14px}.pricebook-head{display:block}}

/* v1.5.0: favorites / target price / backup */
.pricebook-filter-grid{display:grid;grid-template-columns:minmax(220px,1fr) 180px auto;gap:8px;align-items:center;margin:12px 0}.pricebook-filter-grid input,.pricebook-filter-grid select,.pricebook-tools select,.pricebook-meta select,.pricebook-meta input{min-height:44px;border:1px solid var(--line);border-radius:11px;padding:8px 11px;background:#fff}.favorite-filter{display:flex;align-items:center;gap:7px;min-height:44px;padding:0 10px;border:1px solid var(--line);border-radius:11px;background:#fff;font-weight:800;font-size:13px}.favorite-filter input{min-height:auto}.backup-note{margin:8px 0 14px;padding:10px 12px;background:#f7f9ff;border:1px solid #dce4ff;border-radius:12px;color:#59667b;font-size:12px}.pricebook-item.is-favorite{border-color:#e9c14f;box-shadow:0 8px 24px rgba(181,134,0,.09)}.item-title-row{display:flex;align-items:center;gap:7px}.favorite-btn{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:20px;line-height:1;cursor:pointer}.favorite-btn.active{color:#d49a00;background:#fff8d9;border-color:#e8c75c}.pricebook-meta{display:grid;grid-template-columns:180px minmax(0,1fr);gap:10px;margin-top:10px}.pricebook-meta label{font-size:11px;font-weight:800;color:#667085}.pricebook-meta label>select{width:100%;display:block;margin-top:4px}.target-inline{display:grid;grid-template-columns:minmax(100px,1fr) 70px;gap:6px;margin-top:4px}.target-inline input{width:100%}.target-inline button{border:1px solid var(--line);background:#172033;color:#fff;border-radius:10px;font-weight:850}.pricebook-metrics{grid-template-columns:repeat(4,1fr)}.buy-target{margin-top:9px;padding:11px 12px;border-radius:12px;font-weight:800;font-size:13px}.buy-target.hit{background:#eaf8f1;border:1px solid #a8dfc7;color:#08754b}.buy-target.wait{background:#fff6e6;border:1px solid #f1d3a2;color:#8a5510}.buy-target.neutral{background:#f7f8fb;border:1px solid var(--line);color:#667085}.shopping-bottom-inner{grid-template-columns:1.35fr 1fr .8fr}.shopping-bottom #toggleFavorite.active{background:#fff4c4;border-color:#e4bd40;color:#916600}
@media(max-width:700px){.pricebook-filter-grid,.pricebook-meta{grid-template-columns:1fr}.pricebook-metrics{grid-template-columns:1fr 1fr}.shopping-bottom-inner{grid-template-columns:1fr 1fr}.shopping-bottom #clearForm{grid-column:1/-1}.pricebook-tools{align-items:stretch}.pricebook-tools .btn,.pricebook-tools select{flex:1 1 150px}}
@media(max-width:390px){.pricebook-metrics{grid-template-columns:1fr}.shopping-bottom-inner{grid-template-columns:1fr 1fr}.shopping-bottom .btn{padding-left:8px;padding-right:8px;font-size:12px}}

/* v1.6.0: faster repeat use, safer history editing, PWA */
.hero-actions-v160{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.hero-actions-v160 .btn{min-width:170px}.install-app-btn{margin-top:10px;width:100%}
.quick-products{margin:10px 0 14px}.quick-product-label{font-size:12px;font-weight:900;color:#475467;margin-bottom:7px}.quick-product-list{display:flex;gap:8px;overflow-x:auto;padding:2px 1px 7px;scrollbar-width:thin}.quick-product{flex:0 0 min(230px,78vw);text-align:left;border:1px solid #d8e0ee;background:#f8faff;border-radius:13px;padding:10px 11px;color:var(--ink)}.quick-product span{float:left;margin-right:7px;color:#e0a000}.quick-product strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.quick-product small{display:block;color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.quick-empty{margin:0;padding:10px 12px;border:1px dashed #cad5e8;border-radius:12px;color:var(--muted);font-size:12px;background:#f8fafc}
.pricebook-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}.pricebook-actions .btn{min-height:38px;padding:7px 10px;font-size:12px;width:auto;margin:0}.btn-compact{width:auto!important;margin:0!important}.pricebook-record{align-items:center}.pricebook-record strong{margin-left:auto}.record-delete,.link-danger{border:0;background:transparent;color:#9d2235;text-decoration:underline;text-underline-offset:2px;font-size:11px;padding:4px 5px}.pricebook-danger{text-align:right;margin-top:6px}.backup-status{display:flex;gap:7px;align-items:flex-start;margin:10px 0 14px;padding:10px 12px;border-radius:12px;background:#f8fafc;border:1px solid var(--line);font-size:12px;color:#667085}.backup-status strong{color:#9a5a00}.backup-status.needs-backup{background:#fff8e8;border-color:#ecd59a}.pricebook-metrics{grid-template-columns:repeat(4,1fr)}
.offline-badge{display:none}
@media(max-width:600px){.hero-actions-v160{display:grid;grid-template-columns:1fr 1fr}.hero-actions-v160 .btn{min-width:0;padding:9px 8px;font-size:13px}.pricebook-actions{justify-content:flex-start;margin-top:9px}.pricebook-actions .btn{flex:1}.pricebook-record{display:grid;grid-template-columns:1fr auto auto;gap:8px}.pricebook-record span{min-width:0}.pricebook-record strong{margin:0}.backup-status{display:block}.backup-status strong{display:block;margin-bottom:3px}}
.result-saved-note{display:inline-flex;margin-bottom:9px;padding:4px 8px;border-radius:999px;background:#eaf8f1;color:#08754b;font-size:11px;font-weight:900}