:root{color-scheme:light;--ink:#192332;--muted:#657180;--blue:#2476db;--paper:#fff;--soft:#f4f5f7}
*{box-sizing:border-box;border-radius:0}
html{scroll-behavior:smooth;scroll-padding-top:28px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-underline-offset:4px;overflow-wrap:anywhere}
button{font:inherit;border:0;cursor:pointer}
:focus-visible{outline:3px solid var(--blue);outline-offset:5px}
.skip-link{position:absolute;left:16px;top:-80px;z-index:10;background:white;padding:12px}
.skip-link:focus{top:8px}
.review-banner{display:flex;align-items:center;justify-content:center;gap:24px;padding:12px 24px;background:#f2f3f5;color:#3d4651;font-size:13px;line-height:1.6}
.review-banner strong{white-space:nowrap}
.site-header{max-width:1200px;margin:auto;display:flex;align-items:center;gap:24px;padding:30px 40px}
.wordmark{color:var(--blue);font-size:38px;font-weight:800;letter-spacing:-2px;line-height:1}
.site-description{color:var(--muted);font-size:13px;letter-spacing:.05em}
main{max-width:1184px;margin:auto;padding:44px 40px 100px}
.article-heading{max-width:850px;margin:0 auto 42px}
.category{font-size:14px;letter-spacing:.07em;color:var(--blue);font-weight:700;margin:0 0 18px}
h1{text-wrap:balance;font-size:clamp(28px,3vw,42px);line-height:1.6;letter-spacing:.01em;margin:0;font-weight:800;overflow-wrap:anywhere}
.byline{color:var(--muted);font-size:13px;margin:24px 0 0}
figure{margin:38px 0}
figure img{display:block;width:100%;height:auto;background:var(--soft)}
.cover{max-width:850px;margin:0 auto 60px}
.cover img{aspect-ratio:16/9;object-fit:contain}
.reading-layout{display:grid;grid-template-columns:230px minmax(0,760px);column-gap:64px;align-items:start}
.toc{position:sticky;top:24px;font-size:13px;line-height:1.8;padding-top:10px}
.toc summary{font-size:15px;font-weight:700;cursor:pointer}
.toc ol{padding-left:1.4em;margin-top:18px}
.toc li{padding:0 0 13px 4px;color:var(--muted)}
.toc a{color:#4f5a68;text-decoration:none}
.toc a:hover{text-decoration:underline;color:var(--blue)}
.article-body{font-size:17px;line-height:2.05;min-width:0;overflow-wrap:anywhere}
.article-body p{margin:0 0 24px}
.article-body h2{font-size:26px;font-weight:800;line-height:1.65;margin:60px 0 26px}
.article-body h3{font-size:21px;line-height:1.7;margin:40px 0 20px}
.article-body h4{font-size:18px;line-height:1.7;margin:30px 0 18px}
.article-body ul{padding:24px 26px 24px 48px;margin:26px 0;background:var(--soft)}
.article-body li{padding:5px 0}
.article-body strong{font-weight:800}
.article-body blockquote{margin:26px 0;padding:24px 28px;background:var(--soft)}
.article-body blockquote p:last-child{margin-bottom:0}
figcaption{font-size:12px;line-height:1.8;color:var(--muted);margin-top:12px}
.video-stage{display:flex;justify-content:center;align-items:center;aspect-ratio:16/9;min-height:200px;background:#162132}
.load-video{color:white;background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;min-height:140px;width:100%;padding:30px;font-size:15px;text-decoration:none}
.play-symbol{font-size:38px;font-family:Arial,sans-serif}
.video-stage iframe{width:100%;height:100%;min-height:200px;border:0;aspect-ratio:16/9}
.link-card{margin:28px 0;padding:24px;background:var(--soft)}
.link-card span{display:block;font-size:12px;color:var(--muted);margin-bottom:8px}
.link-card a{display:block;font-size:15px}
.site-footer{padding:44px 24px 56px;background:var(--soft);text-align:center}
.site-footer .wordmark{font-size:28px}
.site-footer p,.site-footer a{font-size:13px}
@media(max-width:1000px){.reading-layout{grid-template-columns:minmax(0,760px);justify-content:center}.toc{position:static;margin-bottom:42px;padding:24px;background:var(--soft)}.toc ol{columns:2;column-gap:35px}.toc li{break-inside:avoid}.cover{margin-bottom:32px}}
@media(max-width:600px){.review-banner{align-items:flex-start;flex-direction:column;gap:2px;padding:10px 20px;font-size:11px}.site-header{padding:25px 22px;gap:18px}.wordmark{font-size:31px}.site-description{font-size:10px}main{padding:23px 22px 65px}.article-heading{margin-bottom:26px}h1{font-size:27px;line-height:1.65}.category{font-size:12px;margin-bottom:13px}.byline{font-size:11px;margin-top:18px}.cover{margin:0 -22px 32px}.toc{padding:20px;font-size:12px;margin-bottom:32px}.toc ol{columns:1;margin-bottom:0}.article-body{font-size:16px;line-height:2}.article-body h2{font-size:22px;margin-top:46px}.article-body h3{font-size:19px}.article-body ul{padding:20px 20px 20px 38px}.article-body blockquote{padding:20px}.article-body figure{margin:28px 0}figcaption{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.table-scroll{overflow-x:auto;max-width:100%;margin:28px 0}.article-body table{border-collapse:collapse;width:100%;font-size:15px}.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid #ddd;text-align:left}.article-body thead{border-top:2px solid #192332}.article-body code{background:#f4f5f7;padding:2px 5px}.article-body hr{border:0;border-top:1px solid #ddd;margin:32px 0}
.article-body pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#f4f5f7;padding:20px}.article-body pre code{padding:0}