*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f5f7f9;color:#172533;font:17px/1.65 system-ui,-apple-system,"Segoe UI",sans-serif}a{color:#235d85;text-underline-offset:3px}a:hover{color:#103d61}a:focus-visible{outline:3px solid #397ec1;outline-offset:3px}.site-header{display:flex;gap:24px;align-items:center;flex-wrap:wrap;background:#fff;border-bottom:1px solid #d8e1e8;padding:18px max(20px,calc((100vw - 1180px)/2))}.brand{font-size:21px;font-weight:750;text-decoration:none;color:#172533}.brand span{font-weight:400}.site-header nav{display:flex;flex-wrap:wrap;gap:18px;font-size:15px}.languages{margin-left:auto}.languages [aria-current]{font-weight:750}main{max-width:1180px;margin:auto;padding:24px 20px 56px}.breadcrumbs{font-size:14px;color:#5f7080;overflow-wrap:anywhere;margin-bottom:24px}.reading{display:grid;grid-template-columns:250px minmax(0,1fr);gap:36px;align-items:start}.toc{background:#eef3f6;border-radius:16px;padding:16px;font-size:14px}.toc h2{font-size:16px;margin:0 0 10px}.toc ul{list-style:none;padding:0;margin:0}.toc li{margin:8px 0}.article-body{background:#fff;border:1px solid #d8e1e8;border-radius:18px;padding:32px;min-width:0}.article-body h1{font-size:clamp(27px,3vw,39px);line-height:1.2;margin:0 0 24px}.article-body h2{font-size:25px;line-height:1.3;margin-top:36px;scroll-margin-top:24px}.article-body h3{font-size:20px;line-height:1.35;margin-top:28px}.article-body p{margin:16px 0}.article-body li{margin:8px 0}.article-body code{background:#eef3f6;padding:2px 5px;border-radius:4px;white-space:normal;overflow-wrap:anywhere;font-size:.88em}.table-wrap{overflow-x:auto;margin:24px 0}table{border-collapse:collapse;width:100%;font-size:15px}th,td{padding:12px;border:1px solid #d8e1e8;text-align:left;vertical-align:top;overflow-wrap:anywhere}th{background:#eef3f6}.related{margin:32px 0 0;padding:24px;background:#eef3f6;border-radius:16px}.related h2{font-size:22px;margin-top:0}.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;list-style:none;margin:32px 0;padding:0}.guide-grid li{padding:24px;border:1px solid #d8e1e8;border-radius:16px;background:#fff}.guide-grid h2{font-size:23px;line-height:1.3;margin-top:0}.guide-grid p{font-size:15px;color:#526879}footer{display:flex;gap:24px;flex-wrap:wrap;padding:24px max(20px,calc((100vw - 1180px)/2));border-top:1px solid #d8e1e8;font-size:14px}.skip{position:absolute;top:-100px}.skip:focus{top:8px;background:#fff;padding:10px;z-index:2}@media(max-width:850px){.reading{grid-template-columns:minmax(0,1fr);gap:20px}.toc{font-size:15px}.guide-grid{grid-template-columns:minmax(0,1fr)}.article-body{padding:24px}}@media(max-width:480px){body{font-size:16px}.site-header{gap:14px}.site-header nav{gap:12px}.languages{margin-left:0}main{padding:18px 14px 36px}.article-body{padding:20px 16px}.article-body h2{font-size:22px}th,td{padding:8px;font-size:14px}}
.article-heading{max-width:960px;margin-bottom:28px}.article-heading h1{font-size:clamp(28px,3vw,40px);line-height:1.2;margin:0}.toc summary{font-weight:700;cursor:pointer}
@media(max-width:480px){.table-wrap table{min-width:560px}.table-wrap th,.table-wrap td{overflow-wrap:normal;word-break:normal}}

/* R31 light social logo */
.site-header .brand{display:flex;align-items:center;gap:10px}.site-header .brand-logo{display:block;width:42px;height:42px;border-radius:10px;object-fit:cover;flex:0 0 auto}
@media(max-width:480px){.site-header .brand-logo{width:38px;height:38px}}