:root{color-scheme:light;--ink:#273932;--muted:#5b6c64;--line:#e2e8e1;--brand:#326c56;--paper:#fff;--tint:#f2f6ef}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fafbf7;color:var(--ink);font-family:"Noto Sans JP","Yu Gothic",Meiryo,sans-serif;line-height:1.85}a{color:var(--brand);text-underline-offset:.24em}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid #b37027;outline-offset:5px}p{margin:1em 0}h1,h2,h3{line-height:1.5;text-wrap:pretty}h1{font-size:clamp(1.7rem,3vw,2.4rem);margin:.45em 0 .7em;letter-spacing:.01em}h2{font-size:1.3rem;margin:0 0 1em}ul{padding-left:1.4em}li+li{margin-top:.6em}
.site-header{background:white;border-bottom:1px solid var(--line);padding:20px max(24px,calc((100vw - 1120px)/2));display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.brand{font-weight:700;font-size:1.05rem;text-decoration:none}.site-header nav,footer{display:flex;gap:24px;flex-wrap:wrap}.site-header nav{font-size:.85rem}main{max-width:1120px;margin:auto;padding:24px 28px 72px}.breadcrumbs{font-size:.75rem;color:var(--muted);margin-bottom:32px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;line-height:1.7}.breadcrumbs li{margin:0}.breadcrumbs li+li::before{content:"›";margin-right:8px}.eyebrow{color:var(--brand);font-size:.78rem;font-weight:700;letter-spacing:.08em}.lead{font-size:1rem;color:var(--muted);max-width:38em}.button{display:inline-block;background:var(--brand);color:white;border-radius:9px;padding:12px 20px;text-decoration:none;font-weight:700;font-size:.95rem}.button:hover{background:#255443}.text-link{font-weight:700;font-size:.9rem}.index-intro{padding:12px 0 28px}.index-intro h1{font-size:clamp(2.2rem,4.5vw,3.3rem);line-height:1.3;margin:.4em 0}.index-intro .lead{margin:20px 0}.topic-nav{display:flex;gap:12px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:24px}.topic-nav a{border:1px solid #cddccd;background:white;border-radius:50px;padding:10px 20px;text-decoration:none;font-weight:700}.topic-nav span{font-size:.75rem;color:var(--muted);margin-left:12px}
section{margin-top:40px;scroll-margin-top:24px}.collection-heading{display:flex;gap:24px;align-items:baseline;flex-wrap:wrap}.collection-heading h2{margin:0;font-size:1.4rem}.collection-heading p{color:var(--muted);font-size:.9rem;margin:0}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;list-style:none;padding:0;margin-top:24px}.article-grid li{margin:0}.article-card{display:flex;flex-direction:column;height:100%;border:1px solid var(--line);border-radius:18px;background:white;text-decoration:none;overflow:hidden;transition:box-shadow .18s,transform .18s}.article-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px #27393210}.card-copy{padding:22px;display:flex;flex-direction:column;flex:1}.card-label{font-size:.74rem;font-weight:700;color:var(--accent);margin:0 0 8px}.article-card h2{font-size:1.15rem;color:var(--ink);margin:0 0 10px}.card-copy>p:not(.card-label){font-size:.85rem;color:var(--muted);margin:0 0 20px}.card-link{display:flex;align-items:center;justify-content:space-between;margin-top:auto;font-size:.8rem;font-weight:700}.card-link b{font-size:1.25rem}
.tone-teal{--accent:#26746b;--wash:#e5f2ed;--edge:#b9d9cf}.tone-blue{--accent:#376b96;--wash:#e9f1f8;--edge:#c2d7e6}.tone-purple{--accent:#76528c;--wash:#f0eaf6;--edge:#d7c6e5}.tone-orange{--accent:#946029;--wash:#fcf0db;--edge:#e5cfaa}.tone-pink{--accent:#96566c;--wash:#f9eaf0;--edge:#e8c3d0}.example-visual{background:var(--wash);border:1px solid var(--edge);border-radius:20px;padding:30px 22px;text-align:center;display:flex;flex-direction:column;justify-content:center;gap:18px;min-height:250px;color:var(--ink)}.demo-prompt{font-size:.85rem;font-weight:700;margin:0}.demo-tokens{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px}.demo-tokens span{display:inline-flex;align-items:center;justify-content:center;min-width:65px;min-height:65px;padding:12px 18px;background:white;color:var(--accent);border-radius:14px;box-shadow:0 4px 0 var(--edge);font-size:clamp(1rem,2.5vw,1.6rem);font-weight:700;line-height:1.5}.demo-answer{font-size:.8rem;margin:0;color:var(--accent);font-weight:700}.example-visual.compact{min-height:180px;border:0;border-radius:0;padding:20px 14px;gap:14px}.compact .demo-prompt{font-size:.72rem}.compact .demo-tokens span{font-size:1rem;min-width:48px;min-height:48px;padding:8px 12px}.compact .demo-answer{font-size:.7rem}
.article-hero{display:grid;grid-template-columns:1.25fr 1fr;align-items:center;gap:40px;padding:8px 0 40px;border-bottom:1px solid var(--line)}.article-hero h1{font-size:clamp(1.7rem,2.8vw,2.25rem)}.article-hero .lead{margin-bottom:24px}.reading-layout{display:grid;grid-template-columns:210px minmax(0,720px);gap:64px;align-items:start;margin-top:36px}.reading-rail{position:sticky;top:24px}.reading-rail nav{display:flex;flex-direction:column;gap:14px;border-left:2px solid var(--edge);padding-left:16px}.reading-rail a{font-size:.78rem;color:var(--muted);text-decoration:none}.reading-rail a:hover{color:var(--accent);text-decoration:underline}.article-body>section:first-child{margin-top:0}.quick-points{background:white;border:1px solid var(--edge);border-radius:16px;padding:24px 28px}.quick-points .eyebrow{color:var(--accent);margin:0 0 8px}.quick-points h2{font-size:1.15rem;margin-bottom:12px}.quick-points ul{padding:0;list-style:none;margin:0}.quick-points li{position:relative;padding-left:24px;font-size:.98rem;font-weight:600}.quick-points li:before{content:"✓";position:absolute;left:0;color:var(--accent)}.try-steps{padding:6px 0}.try-steps ol{counter-reset:step;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding:0;list-style:none;margin:0}.try-steps li{counter-increment:step;margin:0;background:var(--wash);padding:18px 16px;border-radius:12px;font-size:.87rem}.try-steps li:before{content:counter(step,decimal-leading-zero);display:block;font-size:1.3rem;font-weight:700;color:var(--accent);margin-bottom:8px}.article-intro{font-size:.95rem;color:var(--muted);margin:32px 0}.reading-section{margin:44px 0 0;padding-top:28px;border-top:1px solid var(--line)}.section-heading{display:flex;gap:14px;align-items:baseline}.section-heading>span{font-size:.85rem;color:var(--accent);font-weight:700}.section-heading h2{font-size:1.25rem}.reading-section p{font-size:1rem;line-height:2;margin:18px 0}.examples{list-style:none;padding:0;display:grid;gap:10px;margin:4px 0 24px}.examples li{margin:0;background:var(--wash);border-left:3px solid var(--accent);padding:14px 18px;border-radius:0 10px 10px 0;font-size:.93rem;line-height:1.85}.tool-callout{border:1px solid #b8cec0;border-radius:16px;padding:28px;background:#eff6ec;margin:44px 0 20px}.tool-callout h2{font-size:1.2rem}.tool-callout p{font-size:.93rem}.small,.editorial-note{font-size:.8rem;color:var(--muted)}.editorial-note{padding:12px 0}.source-notes{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;font-size:.85rem}.source-notes summary{cursor:pointer;font-weight:700}.related ul{list-style:none;padding:0}.related li{border-bottom:1px solid var(--line);padding:14px 0;margin:0}.related a{text-decoration:none;display:block;font-size:.95rem}.related span{display:block;font-size:.75rem;color:var(--muted)}.tool-list{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.tool-list li{margin:0;padding:16px;border:1px solid var(--line);border-radius:10px;background:white}.tool-list p{font-size:.9rem;margin:4px 0;color:var(--muted)}footer{justify-content:center;border-top:1px solid var(--line);padding:28px 24px;font-size:.85rem}.skip-link{position:absolute;left:16px;top:-100px;background:white;padding:8px;z-index:10}.skip-link:focus{top:8px}
@media(max-width:950px){.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.reading-layout{grid-template-columns:minmax(0,720px);justify-content:center;gap:0}.reading-rail{display:none}.article-hero{gap:24px}.article-hero h1{font-size:1.75rem}}
@media(max-width:600px){main{padding:18px 18px 48px}.breadcrumbs{margin-bottom:22px}.site-header{padding:15px 18px;gap:10px}.site-header nav{font-size:.78rem;gap:18px}.article-grid,.tool-list{grid-template-columns:1fr}.index-intro{padding-top:0}.index-intro h1{font-size:2.25rem}.topic-nav a{padding:8px 14px;font-size:.85rem}.collection-heading{gap:6px}.collection-heading p{font-size:.8rem}.article-hero{grid-template-columns:1fr;gap:22px;padding-bottom:28px}.article-hero h1{font-size:1.65rem}.article-hero .lead{font-size:.94rem;margin-bottom:16px}.example-visual{min-height:200px;padding:24px 16px}.reading-layout{margin-top:28px}.quick-points{padding:22px 20px}.quick-points li{font-size:.9rem}.try-steps ol{grid-template-columns:1fr;gap:9px}.try-steps li{display:flex;gap:14px;align-items:baseline;padding:12px 16px}.try-steps li:before{margin:0;font-size:1rem}.reading-section p{font-size:.95rem;line-height:1.95}.section-heading h2{font-size:1.15rem}.tool-callout{padding:22px}.card-copy{padding:20px}.example-visual.compact{min-height:155px}.article-grid{gap:20px}.collection-heading{display:block}.article-collection{margin-top:32px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.article-card{transition:none}.article-card:hover{transform:none}}
@media print{body{background:white;color:black}.site-header,footer,.reading-rail,.skip-link{display:none}.reading-layout{display:block}.article-hero{display:block}main{max-width:none;padding:0}.tool-callout,.example-visual,.quick-points{break-inside:avoid}a{color:inherit}.source-notes{display:block}}
/* Keep the index entrance compact so examples appear in the first screen. */
.index-intro{display:grid;grid-template-columns:1.2fr 1fr;column-gap:40px;row-gap:12px;align-items:center;padding:0 0 24px}.index-intro .eyebrow{grid-column:1/-1;margin:0}.index-intro h1{font-size:2.45rem;line-height:1.35;margin:0;grid-row:2/4}.index-intro .lead{margin:0;font-size:.95rem}.index-intro .text-link{font-size:.8rem}.topic-nav{padding-bottom:20px}.article-collection{margin-top:28px}
@media(max-width:600px){.index-intro{display:block;padding-bottom:18px}.index-intro h1{font-size:1.95rem;margin:10px 0}.index-intro .lead{margin:12px 0}.index-intro .text-link{font-size:.78rem}}
.guide-flow{display:flex;gap:12px;flex-wrap:wrap;padding:12px 16px;margin-bottom:22px;border:1px solid #dae5d9;border-radius:10px;font-size:.8rem;background:white}.guide-flow span[aria-current]{font-weight:700;color:#326c56}.guide-flow span:last-child{color:#66756d}.tool-guide-link{font-size:.8rem}.embedded-guide .site-header,.embedded-guide footer,.embedded-guide .breadcrumbs,.embedded-guide .guide-flow,.embedded-guide .reading-rail{display:none}.embedded-guide main{padding-top:24px}.embedded-guide .reading-layout{display:block;max-width:720px;margin:30px auto 0}.embedded-guide .article-hero{padding-top:0}.embedded-guide .index-intro{padding-top:0}
.tool-tour{margin:28px 0 44px;padding:28px;border:1px solid #d9e4dc;border-radius:18px;background:#fff}.tool-tour>h2{margin-top:8px}.tool-tour-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:start}.tool-tour figure{margin:0}.tool-tour img{display:block;width:100%;height:auto;border:1px solid #dce4df;border-radius:10px}.tool-tour figcaption{font-size:.73rem;color:#65766b;line-height:1.7;margin-top:10px}.tool-tour ol{padding-left:1.4em;margin-top:0}.tool-tour li{padding-left:6px;margin-bottom:20px}.tool-tour li::marker{color:#376b56;font-weight:700}.tool-tour h3{font-size:1rem;margin:0 0 6px}.tool-tour li p{font-size:.88rem;line-height:1.85;margin:0}.screenshot-zoom{margin-top:20px;border-top:1px solid #e1e8e2;padding-top:12px}.screenshot-zoom summary{cursor:pointer;color:#356550;font-weight:700;font-size:.85rem;padding:8px 0}.screenshot-zoom img{margin-top:12px}@media(max-width:700px){.tool-tour{padding:18px;margin-top:20px}.tool-tour-grid{grid-template-columns:1fr;gap:22px}.tool-tour>h2{font-size:1.35rem}.tool-tour-grid figure{max-width:430px;margin:0 auto}.tool-tour .button{display:block;text-align:center}}@media print{.screenshot-zoom{display:none}}
.screenshot-zoom{max-width:100%;overflow-x:auto}.screenshot-zoom img{min-width:960px}.screenshot-zoom summary{position:sticky;left:0}.screenshot-zoom .small{font-size:.75rem;color:#65766b}
.tool-card-photo{display:block;width:100%;height:230px;object-fit:cover;object-position:top;border-bottom:1px solid #dce4df}.tool-article-hero{padding:16px 0 8px;max-width:880px}.tool-article-hero h1{font-size:2.15rem;line-height:1.5;margin:12px 0}.tool-article-hero .lead{font-size:1rem;line-height:1.9}@media(max-width:600px){.tool-article-hero h1{font-size:1.65rem}.tool-card-photo{height:200px}}