@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700;800;900&display=swap');
:root{--ink:#10243a;--muted:#586879;--blue:#175be8;--pale:#edf4ff;--line:#dbe3ed;--orange:#f77b38;--paper:#fff;--navy:#102d4d;--radius:16px;font-family:'Noto Sans JP',system-ui,sans-serif;color:var(--ink);background:#fff;font-synthesis:none;font-size:16px}
*{box-sizing:border-box}body{margin:0;line-height:1.85}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}a,button,input,select{touch-action:manipulation}button,a,input,summary,select{outline-offset:5px}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,select:focus-visible{outline:3px solid var(--orange)}button{cursor:pointer}button:disabled{cursor:default}p{margin:0 0 1em}h1,h2,h3,h4{line-height:1.5;letter-spacing:-.035em;margin:0 0 .65em}h1{font-size:clamp(2rem,4vw,3.5rem);font-weight:900}h2{font-size:clamp(1.5rem,2.4vw,2.05rem);font-weight:800}h3{font-size:1.17rem}small,.small{font-size:.875rem}.muted{color:var(--muted)}.wrap{width:min(1160px,calc(100% - 64px));margin:auto}.skip{position:absolute;top:-100px;left:12px;background:#fff;padding:12px;z-index:200}.skip:focus{top:12px}.header{border-bottom:1px solid 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.grid{margin-top:24px}.list-cases{list-style:none;counter-reset:case;padding:0}.list-cases li{counter-increment:case;padding:14px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:28px 1fr;gap:12px;font-size:.925rem}.list-cases li:before{content:counter(case,decimal-leading-zero);color:var(--blue);font-size:.8rem;font-weight:700;margin-top:2px}.footer{background:#f5f8fc;border-top:1px solid var(--line);margin-top:22px;padding:39px 0 28px}.footer-main{display:flex;justify-content:space-between;gap:30px}.footer-links{display:flex;gap:25px;font-size:.875rem;flex-wrap:wrap}.footer-note{font-size:.75rem;color:var(--muted);margin-top:25px;border-top:1px solid var(--line);padding-top:20px;display:flex;justify-content:space-between;gap:24px}.footer .brand{font-size:1.15rem}.footer p{font-size:.875rem;color:var(--muted);margin-top:12px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:13px 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@media(max-width:1000px){.nav{gap:16px}.wrap{width:calc(100% - 40px)}.hero{gap:30px}.article-layout{grid-template-columns:minmax(0,1fr) 210px;gap:30px}.grid{gap:16px}.card{padding:22px}}
@media(max-width:780px){.header-inner{min-height:76px;flex-wrap:wrap;gap:0}.brand{font-size:1.15rem}.brand-sub{font-size:.72rem}.brand-mark{width:34px;height:38px}.menu-button{display:block}.nav{display:none;width:100%;padding:12px 0 22px;flex-wrap:wrap;gap:12px 25px}.nav.open{display:flex}.hero{grid-template-columns:1fr;padding:38px 0;gap:30px}.hero h1{font-size:2.4rem}.hero .intro{max-width:600px}.workbook{padding:24px}.metrics{gap:26px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.section{padding:38px 0}.section-head{align-items:start;flex-direction:column;gap:12px;margin-bottom:22px}.article-layout{display:block}.toc{display:none}.home-feature{grid-template-columns:1fr;padding:25px;gap:24px}.footer-main{flex-direction:column}.footer-note{flex-direction:column;gap:6px}.lesson-block{grid-template-columns:45px 1fr;gap:16px}.lesson-block .grid{grid-template-columns:1fr}.page-head{padding-top:18px}}
@media(max-width:520px){.wrap{width:calc(100% - 36px)}.grid,.grid.two{grid-template-columns:1fr}.hero h1{font-size:2.15rem}.hero .eyebrow{margin-bottom:14px}.workbook{border-radius:15px}.card{padding:24px}.guide-card{min-height:210px}.actions{gap:10px}.button{padding:10px 16px;font-size:.9rem}.hero-note{font-size:.75rem}.metrics strong{font-size:1.5rem}.metrics{gap:23px}.path-card .num{font-size:2rem}.prompt-toolbar{padding:12px}.prompt-text{padding:17px;font-size:.9rem}.article-top h1{font-size:1.9rem}.article-meta{gap:8px 14px}.footer-links{gap:12px 22px}.lesson-block{display:block}.lesson-block .big{font-size:2rem;margin-bottom:15px}.outcome{padding:21px}.filters{gap:7px}.filter{padding:7px 12px;font-size:.8rem}.article-body h2{font-size:1.35rem}.step{gap:12px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media print{.header,.footer,.toc,.copy-btn,.related,.toast{display:none!important}.article-layout{display:block}.wrap{width:100%}.prompt-panel,.outcome,.pitfall{break-inside:avoid}a{color:inherit!important}}
/* ホーム（プロンプト集）: 一覧性を優先して各プロンプトの表示高さを抑え、枠内でスクロールする */
.home-prompts .page-head{padding-bottom:8px}.home-prompts .page-head h1 span{color:var(--blue)}.home-prompts .prompt-text{max-height:12.5em;overflow:auto}.home-prompts .prompt-card h2{margin:10px 0 6px}.home-prompts .prompt-card .prompt-panel{margin-top:12px}
.search-icon{white-space:nowrap;flex:none}.home-prompts .prompt-toolbar{justify-content:flex-end;padding:8px 12px}.home-prompts .prompt-toolbar>span{display:none}
/* アイコン */
.icon{width:1.15em;height:1.15em;flex:none;vertical-align:-.2em}.search-icon .icon{width:20px;height:20px;display:block}.filter{display:inline-flex;align-items:center;gap:6px}.copy-btn{display:inline-flex;align-items:center;gap:5px}
.category[data-cat='文章・リサーチ']{background:#fdf3d8;color:#7a5600}
.pc-icon{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;flex:none;background:var(--pale);color:#144bb4}.pc-icon .icon{width:23px;height:23px}
.pc-icon[data-cat='文章・リサーチ']{background:#fdf3d8;color:#7a5600}.pc-icon[data-cat='資料・データ']{background:#e7f3fa;color:#1d5b7a}.pc-icon[data-cat='画像・動画']{background:#fff1e7;color:#9f4914}.pc-icon[data-cat='仕事の自動化']{background:#e7f5f0;color:#14614b}.pc-icon[data-cat='アプリ開発']{background:#f1edff;color:#5b3a9c}
.pc-labels{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
/* ホーム: 4列（1000px以下で3列、780px以下で2列、520px以下で1列） */
.home-prompts .grid.two{grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.home-prompts .prompt-card{padding:18px;display:flex;flex-direction:column}.home-prompts .prompt-card h2{font-size:1rem;line-height:1.55;margin:12px 0 4px}
.home-prompts .prompt-card>p{font-size:.82rem;line-height:1.65;margin-bottom:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.home-prompts .prompt-text{font-size:.84rem;line-height:1.75;padding:12px 14px;max-height:10.6em}
.home-prompts .prompt-card .prompt-panel{margin-top:12px;flex:1}.home-prompts .prompt-card details>summary{font-size:.8rem}
@media(max-width:1000px){.home-prompts .grid.two{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:780px){.home-prompts .grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.home-prompts .grid.two{grid-template-columns:1fr}}
/* 「役に立った」ボタンと感想・要望フォーム */
.card-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;flex-wrap:wrap}
.like-btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:white;color:var(--muted);border-radius:100px;padding:6px 14px;font-size:.82rem;cursor:pointer}
.like-btn:hover{border-color:#aec5e6;color:var(--blue)}.like-btn[aria-pressed=true]{background:var(--pale);border-color:#aec5e6;color:var(--blue);font-weight:700}.like-btn:disabled{opacity:.6}
.like-count{font-variant-numeric:tabular-nums;font-weight:700}.like-count:empty{display:none}
.sort{display:inline-flex;align-items:center;gap:8px;font-size:.85rem;color:var(--muted);margin:0 0 12px}.sort select{border:1px solid var(--line);border-radius:8px;padding:6px 10px;background:white;color:var(--ink);font:inherit}
.feedback{margin:40px 0 0;padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fafcff}.feedback h2{display:flex;align-items:center;gap:8px;margin-top:0}
.feedback form{display:grid;gap:14px;margin-top:12px}.feedback label{display:grid;gap:6px;font-size:.88rem;font-weight:600}.feedback select,.feedback textarea{border:1px solid #aebed0;border-radius:8px;padding:10px 12px;font:inherit;font-weight:400;background:white;color:var(--ink)}.feedback .button{justify-self:start}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
@media print{.like-btn,.feedback,.sort,.card-actions{display:none}}