:root{--ink:#2c3032;--muted:#60676a;--paper:#fcfbf8;--line:#dfdfd9;--blue:#a4b6c5;--sage:#b6c8ba;--sand:#d8bca6;--purple:#c7bdcf}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:1.5rem}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.85;overflow-wrap:anywhere}a{color:inherit;text-underline-offset:.3em}a:hover{text-decoration:underline}a:focus-visible,summary:focus-visible,.table-wrap:focus-visible{outline:2px solid 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0}img{max-width:100%;height:auto;display:block}figcaption{font-size:.8rem;color:var(--muted);margin-top:8px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;table-layout:fixed;font-size:.85rem}.col-item{width:20%}.col-spec{width:36%}.col-meaning{width:44%}caption{text-align:left;color:var(--muted);font-size:.75rem;padding-bottom:12px}th,td{text-align:left;vertical-align:top;padding:12px 10px;border-bottom:1px solid var(--line)}thead{background:#f0efeb}td small{display:block;color:var(--muted);font-size:.67rem;margin-top:8px;line-height:1.5}.shop-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.button{border:1px solid var(--line);padding:10px 16px}.article ul{padding-left:1.3rem}.article li{margin-bottom:12px}details{border-block:1px solid var(--line);padding:16px 0;font-size:.85rem}summary{cursor:pointer}.skip{position:fixed;left:16px;top:-80px;z-index:10;background:white;padding:12px}.skip:focus{top:12px}@media(max-width:640px){.site-header,main,.site-footer{padding-inline:22px}.site-header{display:block;padding-top:22px;padding-bottom:18px}.site-header nav{margin-top:16px;gap:10px 18px}.hero{padding:50px 0 62px}.hero-copy{font-size:.9rem}.hero-number{bottom:14px}.notes-intro{padding-top:40px}.note-grid{grid-template-columns:1fr}.category{padding-top:30px}.article{margin-top:32px}.article h1{font-size:1.6rem}.article section>h2{font-size:1.15rem}.photo-empty{min-height:150px}table{font-size:.76rem}th,td{padding:10px 6px}.col-item{width:21%}.col-spec{width:35%}.col-meaning{width:44%}.site-footer nav{gap:12px 20px}.editorial{margin:40px 0}.hero h1{font-size:1.95rem}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* Extremely light blocks; category and reader accents stay low saturation. */
.note-card{background:#f7f7f4;padding:22px 24px;margin-bottom:18px;border:1px solid #ecece6}.note-card:nth-child(2){background:#f5f7f7}.editorial{background:#f4f6f3;padding:30px 28px}.reading-step{padding:26px;background:#f6f7f6;border:1px solid #eaedea;scroll-margin-top:16px}.reading-step:nth-child(2){background:#f3f6f8;border-color:#e7ecef}.reading-step:nth-child(3){background:#f7f6f3;border-color:#edeae5}.reading-step:nth-child(4){background:#f4f7f4}.reading-step:nth-child(5){background:#f7f5f8}.reading-step:nth-child(6){background:#f5f6f6}.article .reading-step>section:first-child{margin-top:0}.article .reading-step>section:last-child{margin-bottom:0}.article .reading-step.intro-step{background:transparent;border:0;padding:0}.reader-controls[hidden]{display:none}.reader-controls{position:fixed;bottom:0;left:0;right:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 18px calc(12px + env(safe-area-inset-bottom));background:#fcfbf8f5;border-top:1px solid var(--line);font-size:.78rem}.reader-controls button{min-height:44px;min-width:68px;padding:8px 14px;border:1px solid #cdd3d5;background:#f1f3f3;color:var(--ink);font:inherit;cursor:pointer}.reader-controls button:disabled{opacity:.45;cursor:default}.reader-controls button:focus-visible{outline:2px solid #465f72;outline-offset:2px}.reader-controls span{text-align:center}@media(max-width:640px){.note-card{padding:20px}.reading-step{padding:20px 16px}.review-article.reader-ready{margin-bottom:95px}.reader-ready .reading-step{min-height:calc(100svh - 112px);margin-top:24px;margin-bottom:24px}.reader-ready .intro-step{min-height:0}.reader-ready .reading-step:last-of-type{min-height:calc(100svh - 112px)}.intro-step .photo-empty{min-height:120px}.intro-step .back{margin-bottom:14px}.intro-step .notice{padding:12px;font-size:.78rem}.intro-step .summary{margin-block:20px}.intro-step .summary h2{font-size:1.07rem}.review-article h1{font-size:1.45rem}.editorial{padding:24px 20px}}
.profile-list{display:grid;grid-template-columns:8rem 1fr;gap:12px 22px;font-size:.9rem}.profile-list dt{font-weight:600}.profile-list dd{margin:0}.reader-controls{left:50%;right:auto;bottom:calc(18px + env(safe-area-inset-bottom));transform:translateX(-50%);width:max-content;max-width:calc(100vw - 40px);background:transparent;border:0;padding:0;gap:0;pointer-events:none}.reader-controls [data-progress]{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.reader-controls button{pointer-events:auto;min-width:210px;min-height:48px;border-radius:999px;background:#fcfcfaf5;box-shadow:0 3px 16px #28343a12;border-color:#d9dedc;padding:12px 28px;font-size:.86rem}.reader-controls button:disabled{opacity:.8;box-shadow:0 2px 10px #28343a08}@media(max-width:640px){.profile-list{grid-template-columns:1fr;gap:4px}.profile-list dd{margin-bottom:16px}}
.pr-label{display:inline-block;margin:0 0 14px;padding:2px 10px;border:1px solid #cdd3d5;font-size:.75rem;color:var(--ink);letter-spacing:.04em}.shop-block{margin-top:22px;padding-top:14px;border-top:1px solid var(--line)}.ad-label{margin:0 0 4px;font-size:.75rem;color:var(--ink)}.shop-block .shop-links{margin-top:8px}.shop-block .small{margin:12px 0 0}

/* Category pictograms: generic line icons, not product imagery. */
.card-icon{color:#747e83;margin-bottom:14px;line-height:1}.card-icon svg{display:block}

.catalog-image{margin:0 0 20px}.catalog-image>a{display:block;width:240px;max-width:100%;margin-top:8px}.catalog-image img{display:block;width:240px;max-width:100%;height:auto;object-fit:contain;background:#fff}.catalog-image figcaption{font-size:.7rem;color:#60686b;margin-top:8px}
.catalog-image .ad-label{display:block}
.reader-controls button{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:#2c3032;color:#fff;border:1px solid #2c3032;box-shadow:0 4px 18px #1d252a40;font-weight:600;letter-spacing:.03em}
.reader-controls button .arrow{font-size:1.15rem;line-height:1}
.reader-controls button .ratio{font-weight:500;font-size:.78rem;color:#cfd6d9;padding-left:10px;border-left:1px solid #5b666b}
.reader-controls button:disabled{opacity:1}
.reader-controls button:focus-visible{outline:3px solid #a4b6c5;outline-offset:3px}
.related{scroll-margin-top:16px}
.note-card .catalog-image{display:flex;flex-direction:column;align-items:flex-start}
.note-card .catalog-image>a{width:160px}
.note-card .catalog-image img{width:160px;height:160px;aspect-ratio:1/1;object-fit:contain;background:#fff;border:1px solid #e3e5e1;margin:0!important}
.card-icon{display:flex;align-items:center;justify-content:center;width:72px;height:72px;aspect-ratio:1/1;border:1px solid #e3e5e1;background:#fff}
.product-type{display:inline-block;margin:0 0 6px;padding:1px 8px;border:1px solid #cdd3d5;border-radius:3px;font-size:.75rem;color:#3a4246;background:#fff;letter-spacing:.02em}.note-card .product-type{margin-bottom:4px}
.shop-buttons{display:grid;gap:10px;margin:8px auto 0;max-width:660px}
.shop-n1{grid-template-columns:1fr;max-width:280px;margin-left:0}.shop-n2{grid-template-columns:repeat(2,1fr);max-width:480px;margin-left:0}.shop-n3{grid-template-columns:repeat(3,1fr);margin-left:0}
.shop-btn{display:flex;align-items:center;justify-content:center;gap:8px;min-height:56px;padding:10px 8px;border:1.5px solid #2c3032;border-radius:6px;background:#fff;color:#2c3032;font-weight:600;font-size:.86rem;line-height:1.35;text-align:center;text-decoration:none;word-break:keep-all;overflow-wrap:anywhere}
.shop-btn:hover{background:#2c3032;color:#fff;text-decoration:none}.shop-btn:focus-visible{outline:3px solid #a4b6c5;outline-offset:2px}.shop-arrow{font-weight:400}
@media(max-width:640px){.shop-buttons{gap:8px}.shop-n2,.shop-n3{max-width:none}.shop-btn{font-size:.78rem;min-height:60px;padding:8px 4px;flex-wrap:wrap;gap:2px 6px}}
.shop-btn .nw{white-space:nowrap}.shop-btn{gap:0 4px;flex-wrap:wrap}
/* 2026-10-13 shop buttons */
.reader-controls{bottom:calc(6px + env(safe-area-inset-bottom))}
.shop-btn{border:2px solid #2c3032;border-radius:0;background:#fff;box-shadow:none}
.shop-block .ad-label{font-size:.72rem;color:#60686b;margin-bottom:6px}
.shop-amazon{background:#fff4e2;border-color:#e88a00}.shop-amazon:hover{background:#e88a00;color:#fff}
.shop-rakuten{background:#fbeaea;border-color:#bf0000}.shop-rakuten:hover{background:#bf0000;color:#fff}
.shop-yahoo{background:#eaf2fd;border-color:#2a6fd6}.shop-yahoo:hover{background:#2a6fd6;color:#fff}
.shop-btn{position:relative}.pr-tag{position:absolute;top:3px;left:5px;font-size:.58rem;font-weight:600;line-height:1;letter-spacing:.04em;color:#60686b}
.reader-controls{width:100%;max-width:none;justify-content:center}
.reader-controls .to-top{position:fixed;right:16px;bottom:calc(6px + env(safe-area-inset-bottom));min-width:0;width:56px;height:56px;border-radius:50%;padding:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;font-size:.7rem;line-height:1.1;pointer-events:auto}
.reader-controls .to-top[hidden]{display:none}
.reader-controls .to-top span{font-size:1rem}
.reader-controls button:disabled{cursor:default}
.note-card{cursor:pointer;transition:border-color .15s,background-color .15s}
.note-card h3 a::after{content:"";position:absolute;inset:0;z-index:1}
.note-card .catalog-image a{pointer-events:none}
.note-card:hover{border-color:#9aa6ab;background:#fbfbf9}
.note-card:focus-within{outline:2px solid #465f72;outline-offset:2px}
.note-card h3 a:focus-visible{outline:none}
.note-card{display:grid;grid-template-columns:1fr 3fr;column-gap:14px;align-items:center;padding:12px 14px;margin-bottom:10px}
.note-card .card-media{align-self:start}
.note-card .catalog-image{margin:0}
.note-card .catalog-image .ad-label{font-size:.58rem;margin:0 0 2px;color:#60686b}
.note-card .catalog-image>a{width:100%;margin:0}
.note-card .catalog-image img{width:100%;height:auto;aspect-ratio:1/1;object-fit:contain}
.note-card .catalog-image figcaption{display:none}
.card-placeholder{width:100%;aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;border:1px solid #e3e5e1;background:#fff;color:#8a9296;font-size:.62rem;line-height:1.3;text-align:center}
.note-card .card-body{min-width:0}
.note-card .card-meta{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;margin:0 0 2px}
.note-card .card-meta .product-type{margin:0}
.note-card .card-meta .small{margin:0;font-size:.68rem}
.note-card h3{font-size:.95rem;line-height:1.45;margin:2px 0 4px}
.note-card .card-angle{font-size:.78rem;line-height:1.55;margin:0;color:var(--muted)}
.note-grid{gap:0 18px}
@media(max-width:640px){.note-card{padding:10px 12px;column-gap:12px}.note-card h3{font-size:.9rem}}
.site-header{background:#e9eff3;box-shadow:0 0 0 100vmax #e9eff3;clip-path:inset(0 -100vmax);border-bottom:0}
.site-footer{background:#33424c;box-shadow:0 0 0 100vmax #33424c;clip-path:inset(0 -100vmax);color:#e6ecef;border-top:0;margin-top:40px}
.site-footer a,.site-footer .brand{color:#fff}
.site-footer>div p,.site-footer .small{color:#c3ced4}
.site-footer a:focus-visible{outline-color:#a4b6c5}
.spec-em{font-weight:600;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;text-decoration-color:#e88a00}
.compare{margin-top:24px}.compare h3{font-size:1rem;margin-bottom:8px}.compare-table th[scope=row]{font-weight:600}.pr-inline{display:inline-block;margin-left:6px;padding:0 4px;border:1px solid #cdd3d5;font-size:.6rem;color:#60686b;vertical-align:middle}
.related-cards{display:grid;gap:6px;margin:8px 0}.note-card.mini{padding:6px 10px;grid-template-columns:1fr 5fr;column-gap:10px;align-items:center}.note-card.mini h3{font-size:.82rem;margin:0}.note-card.mini .card-meta{margin:0}
.reading-step{scroll-margin-top:0;margin-top:8px}
@media(max-width:640px){.site-header,main,.site-footer{padding-inline:8px}.reading-step{padding:16px 10px}.article{margin-top:12px}}
.note-card .card-meta{margin:0 0 2px}.note-card.mini .card-angle{font-size:.72rem;line-height:1.4}
html{scroll-padding-top:0}.related{scroll-margin-top:0}
@media(max-width:640px){.compare-table{table-layout:auto}.compare-table thead{position:absolute;left:-9999px}.compare-table,.compare-table tbody,.compare-table tr,.compare-table th,.compare-table td{display:block;width:100%;box-sizing:border-box}.compare-table tr{border:1px solid #dfe3e1;margin-bottom:8px;background:#fff}.compare-table th[scope=row]{background:#eef2f1;padding:8px 10px;text-align:left}.compare-table td{padding:6px 10px;border:0;font-size:.78rem}.compare-table td::before{content:attr(data-label);display:block;font-size:.66rem;color:#60686b}}
.compare h2{font-size:1.05rem;margin:0 0 10px}
.reading-step>.compare{margin-top:0}
.reading-step figure{margin:14px 0 0}.reading-step figure img{display:block;width:100%;height:auto;border:1px solid #e3e5e1}.reading-step figure.portrait img{width:auto;max-width:100%;max-height:52vh;margin:0 auto}.reading-step figcaption{margin-top:6px;font-size:.78rem;line-height:1.5;color:#60686b}.reading-step figure.portrait figcaption{text-align:center}