*{box-sizing:border-box}body{margin:0;background:#f7f7f5;color:#1a1a1a;font-family:'Noto Sans JP','游ゴシック','Yu Gothic','ヒラギノ角ゴ ProN','Hiragino Kaku Gothic ProN',sans-serif;font-size:18px;line-height:1.8;letter-spacing:.05em}main{max-width:896px;margin:auto;padding:24px 16px 64px}a{color:inherit;text-underline-offset:5px}a:focus-visible,button:focus-visible,summary:focus-visible,select:focus-visible{outline:3px solid #555;outline-offset:4px}header{margin:32px 0}h1,h2,h3{line-height:1.5;letter-spacing:.02em}h1{font-size:32px;margin:8px 0 16px}h2,h3{font-size:22px;margin:0 0 16px}.eyebrow,.small{font-size:15px;color:#555}.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:15px}.breadcrumbs a{display:inline-flex;align-items:center;min-height:44px}.lead-note{border-left:3px solid #aaa;padding:8px 16px}.lesson-steps,.purpose-items{padding:0;list-style:none}.lesson-steps>li,main>section,.purpose-items>li{background:#fff;border:1px solid #ddd;border-radius:18px;padding:24px;margin:24px 0}.lesson-steps>li[hidden]{display:none}.lesson-steps>li>:first-child{margin-top:0}p{margin:16px 0}.tool{font-size:16px;color:#555}.check{background:#f3f3f0;padding:16px;border-radius:18px}.step-picker{margin:24px 0 16px}.step-picker label{display:block;font-size:16px;margin-bottom:8px}select{width:100%;padding:8px;min-height:48px;border:1px solid #aaa;border-radius:8px;background:#fff;color:#1a1a1a;font:inherit}.step-controls{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:24px;padding-top:24px;border-top:1px solid #ddd}.step-controls a,button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:8px 24px;border:1px solid #bbb;border-radius:18px;text-decoration:none;background:#fff;font:inherit;color:inherit;cursor:pointer}.step-controls a:last-child{background:#262626;color:#fff}.step-count{font-size:16px;color:#555}details{border-top:1px solid #ddd;padding:16px 0}summary{min-height:44px;cursor:pointer;padding:8px 0;font-weight:600}pre,blockquote{white-space:pre-wrap;overflow-wrap:anywhere;background:#f5f5f3;padding:16px;margin:16px 0;font:inherit;border-radius:18px}figure{margin:24px 0}figure img{max-width:100%;height:auto;border:1px solid #ddd;border-radius:8px}figcaption{font-size:15px;color:#555}.flow ol{display:flex;gap:8px;padding:0;list-style:none;counter-reset:flow;flex-wrap:wrap}.flow li{flex:1;min-width:128px;background:#f3f3f0;padding:16px;border-radius:18px;font-size:16px;counter-increment:flow}.flow li:before{content:counter(flow,decimal-leading-zero);display:block;color:#666;font-size:12px}.topic-cards{display:grid;gap:16px}.topic-cards>a{display:flex;flex-direction:column;gap:8px;text-decoration:none;border:1px solid #ddd;background:#fff;border-radius:18px;padding:24px}.topic-cards>a:hover{border-color:#555}.topic-cards span{font-size:16px;color:#555}.topic-cards strong{font-size:20px}footer{display:flex;flex-wrap:wrap;gap:24px;margin-top:48px;padding-top:24px;border-top:1px solid #ddd}footer a{min-height:44px;display:flex;align-items:center}.source{font-size:16px}dt{font-weight:600;margin-top:24px}dd{margin:8px 0 24px}.screen-figure{margin:24px 0}[role=status]{display:block;font-size:16px;margin-top:8px}@media(min-width:768px){main{padding:32px 32px 64px}h1{font-size:40px}.lesson-steps>li,main>section{padding:32px}.topic-cards{grid-template-columns:1fr 1fr}}@media(prefers-reduced-motion:no-preference){a,button{transition:background .15s,border-color .15s}}
/* 主操作・補助操作・本文リンクを区別する。 */
main{overflow-wrap:anywhere}
.posting-overview a span{flex-shrink:0;white-space:nowrap}
main>section, .lesson-steps>li{scroll-margin-top:24px}
header .eyebrow{letter-spacing:.05em}
button[data-copy]{font-weight:700;background:#262626;color:#fff;border-color:#262626;gap:8px}
button[data-copy]::before{content:"";width:16px;height:16px;flex-shrink:0;border:1px solid currentColor;border-radius:2px;box-shadow:-4px -4px 0 -1px #262626,-4px -4px 0 0 currentColor;margin-left:8px}
.copy-panel button[data-copy]{background:#f7f7f5;color:#1a1a1a;border-color:#f7f7f5}
.copy-panel button[data-copy]::before{box-shadow:-4px -4px 0 -1px #f7f7f5,-4px -4px 0 0 currentColor}
button[data-copy]:hover{filter:brightness(.9)}
.step-controls{flex-wrap:wrap}
.step-controls a{font-weight:600}
main footer a{border:1px solid #bbb;border-radius:18px;padding:8px 16px;background:#fff;text-decoration:none;gap:8px}
main footer a::before{content:"←"}
main footer a:hover,.topic-cards>a:hover{background:#f0f0ed;border-color:#555}
.topic-cards>a::after{content:"手順を見る →";display:block;font-size:16px;font-weight:700;margin-top:auto;padding-top:16px}
details>summary{border-radius:18px;padding:16px;background:#f3f3f0}
details[open]>summary{background:#e8e8e3}
details>summary:hover{background:#e8e8e3}
@media(max-width:767px){button[data-copy],main footer a{width:100%}main footer{gap:16px}.lesson-steps>li,main>section{padding:24px 16px}.step-controls{gap:8px}.step-controls a{padding:8px 16px}}