/* Scoped technical-document additions; retain the existing paper/ink palette. */
.document-focus{padding:30px 0 26px;border-bottom:1px solid var(--doc-line)}
.document-focus>header{display:flex;align-items:baseline;gap:18px;margin-bottom:16px}
.document-focus>header small{font-size:12px;color:var(--doc-muted);letter-spacing:.08em}
.document-focus>header h2{font-size:24px;line-height:1.4;margin:0}
.focus-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.focus-cards>a{display:flex;flex-direction:column;gap:12px;padding:23px 24px;border:1px solid var(--doc-line);background:var(--doc-panel);color:var(--doc-ink);text-decoration:none;min-width:0}
.focus-cards>a:hover,.focus-cards>a:focus-visible{border-color:var(--doc-blue);background:var(--doc-blue-soft)}
.focus-cards small{font-size:12px;color:var(--doc-blue)}
.focus-cards b{font-size:23px;line-height:1.35}
.focus-cards span{font-size:14px;line-height:1.8;color:var(--doc-muted);word-break:keep-all;overflow-wrap:anywhere}
.focus-related{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13px;color:var(--doc-muted);margin:18px 0 0}
.focus-related a,.depth-refs a{color:var(--doc-blue);text-underline-offset:4px}
.document-verification{font-size:12px;line-height:1.9;color:var(--doc-muted);margin:20px 0 8px;max-width:88ch}
.case-depth{margin:28px 0 34px;min-width:0}
.case-takeaway{background:var(--doc-night);color:var(--doc-paper);padding:21px 25px;font-size:17px;line-height:1.85;margin:0 0 30px;word-break:keep-all;overflow-wrap:anywhere}
.depth-section{margin:28px 0;min-width:0}
.depth-section h3{font-size:19px;line-height:1.55;margin:0 0 12px;color:var(--doc-ink);word-break:keep-all}
.depth-section>p{font-size:15px;line-height:1.95;max-width:95ch;word-break:keep-all;overflow-wrap:anywhere;margin:10px 0}
.depth-section>.depth-note{font-size:12px;color:var(--doc-muted);line-height:1.85}
.depth-table-wrap{width:100%;overflow-x:auto;border:1px solid var(--doc-line);margin:14px 0;outline-offset:4px}
.depth-table{width:100%;border-collapse:collapse;font-size:14px;table-layout:fixed}
.depth-table th,.depth-table td{text-align:left;vertical-align:top;padding:15px 18px;border-bottom:1px solid var(--doc-line);line-height:1.85;word-break:keep-all;overflow-wrap:anywhere}
.depth-table thead th{background:var(--doc-blue-soft);font-size:12px;font-weight:700;color:var(--doc-ink)}
.depth-table tbody th{width:24%;font-weight:600;background:var(--doc-panel)}
.depth-table tr:last-child th,.depth-table tr:last-child td{border-bottom:0}
.depth-section>.depth-refs{display:flex;flex-wrap:wrap;gap:6px 15px;font-size:12px;line-height:1.7;color:var(--doc-muted);margin:12px 0}
.ring-preservation{list-style:none;padding:0;margin:18px 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;counter-reset:none}
.ring-preservation li{border:1px solid var(--doc-line);background:var(--doc-panel);padding:20px;display:flex;flex-direction:column;gap:10px}
.ring-preservation b{font-size:19px;color:var(--doc-blue)}
.ring-preservation span{font-size:14px;line-height:1.6}
.verification-record{margin:24px 0 0;padding:15px 20px;border:1px solid var(--doc-line);background:var(--doc-panel)}
.verification-record summary{cursor:pointer;font-size:13px;font-weight:600;line-height:1.7;color:var(--doc-blue)}
.verification-record p{font-size:13px;line-height:1.9;color:var(--doc-muted);margin:12px 0 0;overflow-wrap:anywhere}
.source-code:target{outline:2px solid var(--doc-blue);outline-offset:4px;scroll-margin-top:150px}
.engineering-case,.architecture-overview{scroll-margin-top:150px}
@media(max-width:700px){
 .focus-cards{grid-template-columns:1fr;gap:10px}.focus-cards>a{padding:18px;gap:8px}.focus-cards b{font-size:21px}
 .document-focus>header h2{font-size:21px}.case-takeaway{padding:18px;font-size:15px}.depth-section h3{font-size:17px}
 .depth-section>p{font-size:14px;line-height:1.9}.depth-table{min-width:620px;font-size:13px}.depth-table th,.depth-table td{padding:12px 14px}
 .ring-preservation{grid-template-columns:1fr;gap:8px}.ring-preservation li{padding:14px 18px;flex-direction:row;justify-content:space-between;align-items:center}
 .verification-record{padding:14px 16px}.document-verification{font-size:11px}
}
@media print{
 .document-focus,.document-verification{break-inside:avoid}.focus-cards{grid-template-columns:repeat(3,minmax(0,1fr))}
 .depth-table{min-width:0;font-size:10px}.depth-table-wrap{overflow:visible}.depth-section{break-inside:auto}.depth-table tr{break-inside:avoid}
 .case-takeaway{background:none;color:var(--doc-ink);border:1px solid var(--doc-line)}.depth-refs{display:none!important}
}

/* contrast-and-wrap: override the original case paragraph specificity. */
.engineering-case .case-depth > .case-takeaway{color:var(--doc-paper);}
.document-intro dd{word-break:keep-all;overflow-wrap:anywhere;}
@media print{.engineering-case .case-depth > .case-takeaway{color:var(--doc-ink);}}