/* Stage 2 evidence hub only. Shared header and footer are unchanged. */
.proof-stage2 { --proof-gray: #b5b7be; --proof-line: #30343d; color: var(--text); }
.proof-stage2 .proof-hero { padding: 5rem 0 3rem; }
.proof-stage2 .eyebrow { margin-bottom: 1.3rem; }
.proof-stage2 h1 { font-size: clamp(2.8rem, 6vw, 4.6rem); line-height: 1.08; max-width: 18ch; margin: 0 0 1.5rem; }
.proof-stage2 .lede { max-width: 64ch; color: var(--text); font-size: 1.2rem; }
.proof-stage2 .intro-note { max-width: 73ch; margin: 1rem 0 1.8rem; color: var(--proof-gray); }
.proof-stage2 .proof-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--proof-line); margin-top: 2.6rem; }
.proof-stage2 .proof-nav a { padding: 1.1rem; border-right: 1px solid var(--proof-line); color: var(--text); font-size: .88rem; background: var(--bg-card); }
.proof-stage2 .proof-nav a:last-child { border-right: 0; }
.proof-stage2 .proof-nav span { display: block; color: var(--accent); font-family: var(--mono); font-size: .68rem; margin-bottom: .4rem; }
.proof-stage2 section { padding: 3.6rem 0; scroll-margin-top: 6rem; }
.proof-stage2 h2 { margin: 0 0 1rem; font-size: clamp(1.9rem, 3.7vw, 2.7rem); }
.proof-stage2 h3 { margin: 0 0 .65rem; font-size: 1.05rem; }
.proof-stage2 p, .proof-stage2 li, .proof-stage2 dd { color: var(--proof-gray); }
.proof-stage2 .section-head { display: grid; grid-template-columns: 1fr 1.1fr; gap: 3rem; margin-bottom: 1.7rem; }
.proof-stage2 .section-head p { max-width: 62ch; }
.proof-stage2 .index { font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: .85rem; }
.proof-stage2 .record { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); border: 1px solid var(--proof-line); background: var(--bg-card); }
.proof-stage2 .record > div { padding: 1.7rem; min-width: 0; }
.proof-stage2 .record > div + div { border-left: 1px solid var(--proof-line); }
.proof-stage2 dl { margin: 0; }
.proof-stage2 dt { font-family: var(--mono); color: var(--accent); text-transform: uppercase; font-size: .68rem; letter-spacing: .07em; margin-bottom: .35rem; }
.proof-stage2 dd { margin: 0 0 1.25rem; font-size: .95rem; }
.proof-stage2 dd:last-child { margin-bottom: 0; }
.proof-stage2 .result { color: var(--text); font-size: 1.12rem; }
.proof-stage2 .boundary { margin-top: 1.3rem; padding: 1.1rem 1.3rem; border-left: 2px solid var(--accent); background: var(--bg-subtle); font-size: .92rem; }
.proof-stage2 .boundary p + p { margin-top: .65rem; }
.proof-stage2 .sources { display: flex; flex-wrap: wrap; gap: .6rem 1.5rem; margin-top: 1.2rem; font-size: .85rem; }
.proof-stage2 a:not(.btn) { text-decoration: underline; text-underline-offset: .22em; text-decoration-thickness: 1px; }
.proof-stage2 .proof-nav a { text-decoration: none; }
.proof-stage2 .table-wrap { border-color: var(--proof-line); margin: 1.4rem 0; }
.proof-stage2 caption { text-align: left; padding: 1rem; font-size: .9rem; color: var(--text); background: var(--bg-subtle); }
.proof-stage2 th, .proof-stage2 td { overflow-wrap: anywhere; }
.proof-stage2 td { color: var(--proof-gray); }
.proof-stage2 th[scope="row"] { color: var(--text); font-size: .87rem; font-family: var(--font); text-transform: none; letter-spacing: 0; background: var(--bg-card); vertical-align: top; }
.proof-stage2 .protocol { font-size: .92rem; max-width: 87ch; margin-top: 1rem; }
.proof-stage2 .steps { counter-reset: step; list-style: none; padding: 0; margin-top: 1.5rem; }
.proof-stage2 .steps li { counter-increment: step; display: grid; grid-template-columns: 2rem 1fr; gap: 1rem; padding: 1.2rem 0; border-top: 1px solid var(--proof-line); }
.proof-stage2 .steps li::before { content: "0" counter(step); color: var(--accent); font-family: var(--mono); font-size: .8rem; padding-top: .2rem; }
.proof-stage2 .steps p { font-size: .93rem; margin-top: .4rem; }
.proof-stage2 .limits { padding: 1.8rem; border: 1px solid var(--proof-line); background: var(--bg-subtle); }
.proof-stage2 .limits ul { padding-left: 1.15rem; }
.proof-stage2 .limits li + li { margin-top: .8rem; }
.proof-stage2 .archive-list { list-style: none; padding: 0; margin: 1.2rem 0; }
.proof-stage2 .archive-list li { border-top: 1px solid var(--proof-line); padding: .85rem 0; font-size: .88rem; scroll-margin-top: 6rem; }
.proof-stage2 .archive-list p { margin-top: .35rem; }
.proof-stage2 details { border: 1px solid var(--proof-line); margin-top: 1.25rem; padding: 1.1rem 1.3rem; }
.proof-stage2 summary { color: var(--text); cursor: pointer; }
.proof-stage2 details[open] summary { margin-bottom: 1rem; }
.proof-stage2 code { overflow-wrap: anywhere; }
.proof-stage2 pre { white-space: pre-wrap; overflow-wrap: anywhere; max-width: 100%; }
.proof-stage2 .cta-row { margin-top: 1.4rem; margin-bottom: 0; }
a:focus-visible, button:focus-visible, summary:focus-visible, .proof-stage2 [tabindex]:focus-visible { outline: 2px solid #d9a441; outline-offset: 5px; }
.proof-stage2 [id] { scroll-margin-top: 6rem; }
@media (max-width: 767px) {
  .proof-stage2 .proof-hero { padding: 3.2rem 0 2rem; }
  .proof-stage2 section { padding: 2.6rem 0; }
  .proof-stage2 .proof-nav, .proof-stage2 .section-head, .proof-stage2 .record { grid-template-columns: minmax(0, 1fr); }
  .proof-stage2 .proof-nav a { border-right: 0; border-bottom: 1px solid var(--proof-line); }
  .proof-stage2 .proof-nav a:last-child { border-bottom: 0; }
  .proof-stage2 .section-head { gap: .5rem; }
  .proof-stage2 .record > div { padding: 1.25rem; }
  .proof-stage2 .record > div + div { border-left: 0; border-top: 1px solid var(--proof-line); }
  .proof-stage2 .limits { padding: 1.3rem; }
  .proof-stage2 th, .proof-stage2 td { padding: .65rem .55rem; font-size: .8rem; }
  .proof-stage2 .cta-row { flex-direction: column; align-items: stretch; }
  .proof-stage2 .btn { justify-content: center; }
}