:root{--bg:#fbfbf9;--text:#1f2328;--muted:#5f6670;--line:#e3e3de;--accent:#1d5c8c;--accent-soft:#e8f0f6;--code-bg:#f1f1ec}@media (prefers-color-scheme:dark){:root{--bg:#16181b;--text:#e6e6e3;--muted:#9aa0a8;--line:#2c2f34;--accent:#7db4dc;--accent-soft:#1d2a35;--code-bg:#202328}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif;font-size:17px;line-height:1.85}a{color:var(--accent)}.topbar{background:var(--bg);border-bottom:1px solid var(--line);align-items:center;gap:24px;height:56px;padding:0 24px;display:flex;position:sticky;top:0}.brand{color:var(--text);white-space:nowrap;font-weight:700;text-decoration:none}.topbar nav{scrollbar-width:none;gap:4px;min-width:0;display:flex;overflow-x:auto}.topbar nav a{color:var(--muted);white-space:nowrap;border-radius:6px;align-items:center;gap:6px;padding:6px 10px;font-size:15px;text-decoration:none;display:flex}.topbar nav a:hover{color:var(--text)}.topbar nav a[aria-current=page]{color:var(--accent);background:var(--accent-soft)}.num{border:1px solid;border-radius:50%;flex:none;place-items:center;width:22px;height:22px;font-size:12px;display:inline-grid}main{max-width:720px;margin:0 auto;padding:48px 24px 96px}h1{margin:0 0 12px;font-size:30px;line-height:1.4}h2{margin:56px 0 12px;font-size:21px}.eyebrow{color:var(--muted);margin:0;font-size:14px}.lead{color:var(--muted);margin-top:0;font-size:18px}article h2{border-top:1px solid var(--line);padding-top:24px}code{background:var(--code-bg);border-radius:4px;padding:2px 6px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.9em}pre{background:var(--code-bg);border-radius:8px;padding:16px 20px;overflow-x:auto}pre code{background:0 0;padding:0}ul.contains-task-list{padding-left:0;list-style:none}.task-list-item input{accent-color:var(--accent);margin-right:10px}.chapters{border-top:1px solid var(--line);margin:40px 0;padding:0;list-style:none}.chapters li{border-bottom:1px solid var(--line)}.chapters a{color:var(--text);align-items:baseline;gap:16px;padding:18px 4px;text-decoration:none;display:flex}.chapters a:hover strong{color:var(--accent)}.chapters .num{color:var(--accent);transform:translateY(3px)}.chapters .summary{color:var(--muted);font-size:15px;display:block}.pager{border-top:1px solid var(--line);justify-content:space-between;margin-top:72px;padding-top:24px;display:flex}@media (width<=640px){.topbar{gap:12px;padding:0 16px}.brand{display:none}main{padding:32px 16px 72px}h1{font-size:25px}}pre.astro-code{border:1px solid var(--line)}@media (prefers-color-scheme:dark){.astro-code,.astro-code span{color:var(--shiki-dark)!important;background-color:var(--shiki-dark-bg)!important}}.steps{flex-wrap:wrap;gap:6px;margin:8px 0 20px;padding:0;list-style:none;display:flex}.steps a{border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:2px 10px;font-size:14px;text-decoration:none;display:block}.steps a:hover{color:var(--text)}.steps a[aria-current=page]{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}.goals{background:var(--accent-soft);border-radius:8px;margin:24px 0 8px;padding:16px 20px}.goals>p:first-child{color:var(--accent);margin:0 0 4px;font-size:14px;font-weight:700}.goals ul{margin:0;padding-left:1.2em}figure{margin:28px 0}figure img{border-radius:8px;width:100%;height:auto;display:block}figcaption{color:var(--muted);margin-top:8px;font-size:14px;line-height:1.7}table{border-collapse:collapse;width:100%;margin:20px 0;font-size:15px;line-height:1.6}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:8px 10px}th{color:var(--muted);font-weight:600}.demo{color:#1f2328;border:1px solid var(--line);background:#fff;border-radius:8px;margin:8px 0 28px;padding:36px 20px 20px;line-height:1.6;position:relative}.demo:before{content:"ブラウザでの表示";color:#8a9099;font-size:12px;position:absolute;top:8px;left:12px}.demo h1{margin:0 0 8px;font-size:30px}.demo h3{margin:0;font-size:18px}.demo p{margin:0}.demo-css .member-item{border:1px solid #ccc;border-radius:8px;max-width:240px;padding:16px}.demo-css .member-item h3{color:#1d5c8c;margin:0}.demo-box{font-size:13px}.demo-box div{border-radius:6px;padding:10px 12px}.box-margin{background:#fdf2dc;border:1px dashed #d9b46a}.box-border{background:#fff;border:2px solid #8a9099;margin-top:6px}.box-padding{background:#e3f1e4;margin-top:6px}.box-content{text-align:center;background:#e8f0f6;margin-top:6px}aside{border-left:3px solid var(--line);color:var(--text);margin:28px 0;padding:14px 20px}aside p{margin:6px 0}aside.ask{border-left-color:var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0}aside.ask>p:first-child{color:var(--accent);margin-top:0;font-size:14px;font-weight:700}aside.note{background:var(--code-bg);border-radius:0 8px 8px 0}.quiz{border:1px solid var(--line);border-radius:8px;margin:16px 0;padding:16px 20px}.quiz>p:first-child{margin-top:0;font-weight:600}.quiz ol,.quiz pre{margin:8px 0}.quiz details{margin-top:8px}.quiz summary{cursor:pointer;color:var(--accent);font-size:15px}.quiz details p{margin:8px 0 0}ol li pre{margin:10px 0 14px}.css-toggle{border:1px solid var(--line);border-radius:8px;margin:20px 0 28px;overflow:hidden}.css-toggle .switches{border-bottom:1px solid var(--line);flex-wrap:wrap;gap:4px 18px;padding:12px 16px;font-size:14px;display:flex}.css-toggle .switches label{cursor:pointer;white-space:nowrap}.css-toggle .switches input{accent-color:var(--accent);margin-right:4px}.css-toggle .switches label:first-child{width:100%;font-weight:700}.css-toggle:not(:has(.r-all:checked)) .switches label:not(:first-child){opacity:.4}.css-toggle .stage{color:#000;background:#fff;overflow-x:auto}.css-toggle:not(:has(.r-all:checked)) .stage *{all:revert}.css-toggle:has(.r-all:checked) .stage .member{color:#333;flex-wrap:wrap;padding:32px 16px;font-family:Muli,Helvetica,Arial,sans-serif;line-height:1.43;display:flex}.css-toggle:has(.r-all:checked) .stage .member-item{flex:240px;padding:0 12px}.css-toggle:has(.r-all:checked) .stage h3,.css-toggle:has(.r-all:checked) .stage h4{letter-spacing:1px;margin:10px 0;font-family:Catamaran,Helvetica,Arial,sans-serif;font-weight:200}.css-toggle:has(.r-all:checked) .stage h3{font-size:24px}.css-toggle:has(.r-all:checked) .stage h4{font-size:18px}.css-toggle:has(.r-all:checked) .stage p{margin:0 0 20px;font-size:18px}.css-toggle:has(.r-all:checked) .stage .text-muted{color:#777}.css-toggle:has(.r-all:checked) .stage .img-responsive{max-width:100%;height:auto;display:block}.css-toggle:has(.r-all:checked):has(.r-bg:checked) .stage .member{background-color:#eee}.css-toggle:has(.r-all:checked):has(.r-item:checked) .stage .member-item{text-align:center}.css-toggle:has(.r-all:checked):has(.r-name:checked) .stage .member-item h3{font-size:30px}.css-toggle:has(.r-all:checked):has(.r-face:checked) .stage .facepic{border:5px solid #fff;border-radius:180px;margin-left:auto;margin-right:auto}.prompt{border:1px solid var(--accent);border-radius:8px;margin:16px 0 24px;overflow:hidden}.prompt-bar{background:var(--accent-soft);color:var(--accent);justify-content:space-between;align-items:center;padding:8px 12px 8px 16px;font-size:14px;font-weight:700;display:flex}.prompt .copy{font:inherit;border:1px solid var(--accent);background:var(--accent);color:var(--bg);cursor:pointer;border-radius:6px;padding:4px 14px;font-weight:600}.prompt pre{white-space:pre-wrap;border-radius:0;margin:0;font-size:15px;line-height:1.7}.start ol pre{margin:10px 0 14px;line-height:1.6}.prompt pre code{font-family:inherit}
