/* ABQ Proof Architecture — Step 3 */
.proof-sequence{display:grid;grid-template-columns:repeat(5,1fr);margin-top:18px;padding:14px 18px;border:1px solid var(--line);border-radius:9px;background:#fff}
.proof-sequence>div{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:12px;font-weight:650;white-space:nowrap}.proof-sequence i{display:grid;place-items:center;width:28px;height:28px;border:1px solid #c9d9ce;border-radius:50%;background:var(--green-soft);color:var(--green);font-size:12px;font-style:normal}.proof-sequence b{height:1px;flex:1;margin:0 12px;background:var(--line-strong)}
.proof-section{margin-top:18px;padding:25px;border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;box-shadow:var(--shadow-sm)}
.proof-section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;padding-bottom:20px;border-bottom:1px solid var(--line)}.proof-section-head span{color:var(--muted);font-size:12px;font-weight:680;letter-spacing:.09em;text-transform:uppercase}.proof-section-head h3{margin:8px 0 0;font-size:24px;font-weight:590;letter-spacing:-.03em}.proof-section-head>p{max-width:520px;margin:0;color:var(--muted);font-size:13px;line-height:1.55}
.source-envelope-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:20px;border:1px solid var(--line);border-radius:8px;overflow:hidden}.source-envelope-grid>div{min-height:105px;padding:18px;border-right:1px solid var(--line)}.source-envelope-grid>div:last-child{border-right:0}.source-envelope-grid span,.source-envelope-grid strong{display:block}.source-envelope-grid span{color:var(--muted);font-size:12px}.source-envelope-grid strong{margin-top:19px;font-size:14px;font-weight:620}.source-reference-line{display:grid;grid-template-columns:150px 1fr;gap:18px;margin-top:14px;padding:15px 17px;border-left:3px solid #587363;background:#f5f8f5}.source-reference-line>span{color:var(--muted);font-size:12px;font-weight:650}.source-reference-line>div{display:flex;flex-wrap:wrap;gap:7px}.source-reference-line code{font-size:12px;overflow-wrap:anywhere}
.custody-chain{display:grid;grid-template-columns:repeat(4,1fr);margin-top:24px}.custody-chain article{min-width:0;padding-right:20px}.custody-chain article>div{display:flex;align-items:center}.custody-chain i{display:grid;place-items:center;width:35px;height:35px;border:1px solid #bfcfc4;border-radius:50%;background:#f3f8f4;color:#376a49;font-size:12px;font-style:normal;font-weight:700}.custody-chain b{height:1px;flex:1;background:linear-gradient(90deg,#9fb8a6,#dce3de)}.custody-chain span,.custody-chain strong{display:block}.custody-chain span{margin-top:17px;color:var(--muted);font-size:12px}.custody-chain strong{margin-top:8px;font-size:15px;font-weight:620}.custody-chain p{margin:7px 0 0;color:var(--muted);font-size:12px;line-height:1.45}.chain-seal{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:22px;padding:14px 17px;border:1px solid var(--line);border-radius:7px;background:#f7f9f7}.chain-seal span{color:var(--muted);font-size:12px;font-weight:650}.chain-seal code{font-size:12px;overflow-wrap:anywhere}
.proof-boundary{border-top:3px solid #243129}.boundary-list{margin-top:22px;border-top:1px solid var(--line)}.boundary-list>div{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:52px;border-bottom:1px solid var(--line)}.boundary-list span{color:var(--muted);font-size:12px}.boundary-list strong{font-size:13px;text-align:right}.boundary-limit{margin-top:22px;padding:17px;border-radius:7px;background:#f4f5f3}.boundary-limit>span{color:var(--muted);font-size:12px;font-weight:670;text-transform:uppercase}.boundary-limit ul{margin:13px 0 0;padding-left:17px}.boundary-limit li{margin-top:8px;color:var(--ink-soft);font-size:12px;line-height:1.4}
.claim-proof-grid{display:grid;gap:10px;margin-top:20px}.claim-proof-grid article{display:grid;grid-template-columns:38px 1fr;gap:15px;padding:18px;border:1px solid var(--line);border-radius:8px;background:#fafbf9}.claim-proof-grid article>i{display:grid;place-items:center;width:34px;height:34px;border:1px solid #c7d9cc;border-radius:50%;color:#376a49;font-size:12px;font-style:normal;font-weight:700}.claim-proof-grid span,.claim-proof-grid strong{display:block}.claim-proof-grid span{color:var(--muted);font-size:12px}.claim-proof-grid strong{margin-top:7px;font-size:14px;font-weight:630}.claim-proof-grid p,.claim-proof-empty p{margin:7px 0 0;color:var(--muted);font-size:12px;line-height:1.5}.claim-proof-empty{padding:23px;border:1px dashed var(--line-strong);border-radius:8px;text-align:center}.claim-proof-empty strong{font-size:14px}.proof-limitations{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}.proof-limitations>span{color:var(--muted);font-size:12px;font-weight:650}.proof-limitations>div{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:7px}
@media(max-width:1100px){.proof-sequence{overflow:auto}.proof-sequence>div{min-width:175px}.source-envelope-grid{grid-template-columns:1fr 1fr}.source-envelope-grid>div:nth-child(2){border-right:0}.source-envelope-grid>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.custody-chain{grid-template-columns:1fr 1fr;gap:22px}.custody-chain article:nth-child(2) b{display:none}}
@media(max-width:700px){.proof-section-head{align-items:flex-start;flex-direction:column}.source-envelope-grid,.custody-chain{grid-template-columns:1fr}.source-envelope-grid>div{border-right:0;border-bottom:1px solid var(--line)}.source-envelope-grid>div:last-child{border-bottom:0}.custody-chain article{padding-right:0}.custody-chain b{display:none}.source-reference-line{grid-template-columns:1fr}.proof-limitations{align-items:flex-start;flex-direction:column}.proof-limitations>div{justify-content:flex-start}}

/* Narrative order: claims precede the final verification boundary. */
.proof-ledger-layout{grid-template-columns:1fr}
.proof-boundary{position:static;margin-top:18px}
.boundary-list{display:grid;grid-template-columns:repeat(4,1fr)}
.boundary-list>div{display:block;min-height:90px;padding:17px;border-right:1px solid var(--line)}
.boundary-list>div:last-child{border-right:0}
.boundary-list strong{display:block;margin-top:15px;text-align:left}
@media(max-width:700px){.boundary-list{grid-template-columns:1fr}.boundary-list>div{border-right:0}}

.evidence-record-topbar{display:flex;align-items:center;justify-content:flex-start;margin-bottom:20px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.evidence-registry-back{display:inline-flex;align-items:center;gap:10px;min-height:42px;padding:0 16px 0 9px;border:1px solid var(--line-strong);border-radius:999px;background:#fff;color:var(--ink);font-size:12px;font-weight:670;cursor:pointer;transition:border-color 160ms var(--ease),box-shadow 160ms var(--ease),transform 160ms var(--ease)}
.evidence-registry-back i{display:grid;place-items:center;width:27px;height:27px;border-radius:50%;background:#eff2ef;color:var(--ink);font-size:14px;font-style:normal;transition:background 160ms var(--ease),color 160ms var(--ease)}
.evidence-registry-back:hover,.evidence-registry-back:focus-visible{border-color:#aab6ae;box-shadow:var(--shadow-sm);outline:0;transform:translateX(-2px)}
.evidence-registry-back:hover i,.evidence-registry-back:focus-visible i{background:#253029;color:#fff}
.evidence-record-actions .evidence-registry-back{margin-right:auto}