.postmaster-page{overflow:hidden}
.postmaster-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,390px);gap:64px;align-items:center;padding:54px 0 62px}
.postmaster-hero h1{margin-bottom:10px}
.postmaster-subtitle{font:clamp(1.4rem,2.5vw,2rem)/1.25 var(--serif);color:var(--gold);max-width:27ch;margin-bottom:20px}
.postmaster-cover{margin:0;background:#f8f7f1;color:#30424b;border:1px solid #d9d6c9;border-radius:12px;overflow:hidden;box-shadow:0 18px 54px #0005}
.postmaster-cover a{display:block}
.postmaster-cover img{width:100%;aspect-ratio:1020/1320;object-fit:cover}
.postmaster-cover figcaption{padding:12px 16px;border-top:1px solid #d8d4c7;font-size:12px;line-height:1.55}
.postmaster-nav{position:sticky;top:0;z-index:20;border-block:1px solid var(--line);background:#10151df2;backdrop-filter:blur(10px)}
.postmaster-nav .container{display:flex;gap:6px;overflow-x:auto;scrollbar-width:thin;padding-block:8px}
.postmaster-nav a{display:inline-flex;align-items:center;min-height:42px;padding:8px 14px;border-radius:7px;color:var(--muted);white-space:nowrap;text-decoration:none;font-size:13px;font-weight:650}
.postmaster-nav a:hover{background:var(--panel-2);color:var(--text)}
.depth-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.depth-card{position:relative;padding:25px;border:1px solid var(--line);border-radius:12px;background:var(--panel);min-width:0}
.depth-card.current{border-color:#548d7e;background:#192b2b}
.depth-card h3{font-size:1.2rem;margin-bottom:10px}
.depth-card p:not(.eyebrow){font-size:14px;color:var(--muted)}
.depth-number{position:absolute;right:18px;top:15px;font:28px var(--serif);color:#657581}
.story-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.92fr);gap:52px;align-items:center}
.story-grid.reverse{grid-template-columns:minmax(320px,.92fr) minmax(0,1fr)}
.story-grid.reverse .story-copy{grid-column:2;grid-row:1}
.story-grid.reverse .paper-figure{grid-column:1;grid-row:1}
.story-copy>p{max-width:69ch}
.equation-path{display:flex;align-items:center;justify-content:center;gap:18px;flex-wrap:wrap;padding:25px 18px;margin:26px 0;border:1px solid #486e64;border-radius:12px;background:#20342f;font:clamp(1.2rem,2.2vw,1.75rem)/1.3 var(--serif);text-align:center}
.equation-path b{font-weight:400;color:var(--gold)}
.math-inline{font-family:var(--serif);color:var(--text);white-space:nowrap}
.paper-figure{margin:0;border-radius:12px;overflow:hidden;background:#f7f6ef;color:#344851;border:1px solid #d7d5c9}
.paper-figure img{width:100%}
.paper-figure figcaption{padding:14px 17px;border-top:1px solid #d7d5c9;font-size:12px;line-height:1.6}
.chapter-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.chapter-card{display:flex;flex-direction:column;min-width:0;padding:25px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.chapter-card h3{font:1.45rem/1.25 var(--serif);margin-bottom:11px}
.chapter-card p{font-size:14px;color:var(--muted)}
.chapter-kicker{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}
.chapter-kicker span{display:grid;place-items:center;width:42px;height:42px;border:1px solid #64897d;border-radius:50%;font:20px var(--serif);color:var(--gold)}
.chapter-kicker small{font-size:11px;color:var(--soft);text-transform:uppercase;letter-spacing:.05em}
.chapter-card .carry{padding-top:13px;margin-top:auto;border-top:1px solid var(--line);color:#c7d0d8}
.chapter-links{display:flex;align-items:center;gap:7px 20px;flex-wrap:wrap;margin-top:4px}
.chapter-links a{display:inline-flex;align-items:center;min-height:44px;font-size:13px;font-weight:650}
.summary-link{display:flex;justify-content:space-between;align-items:center;gap:28px;margin-top:16px;padding:25px 28px;border:1px solid #705f3f;border-radius:12px;background:#29281f}
.summary-link h3{font:1.55rem var(--serif);margin-bottom:8px}
.summary-link p{margin-bottom:0;color:var(--muted);max-width:65ch}
.visual-section{border-top-color:#46695f}
.boundary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.boundary-panel{padding:28px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
.boundary-panel.established{border-top:4px solid #6cbca4}
.boundary-panel.open-panel{border-top:4px solid #d57b5a}
.boundary-panel h3{font:1.45rem var(--serif)}
.boundary-panel li{font-size:14px;color:var(--muted);padding-left:4px}
.boundary-panel li+li{margin-top:10px}
.boundary-bottom{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-block:17px 28px}
.equivalence-box{display:flex;flex-direction:column;gap:7px;padding:18px 21px;border:1px solid #806a4c;border-radius:10px;background:#27271f}
.equivalence-box span{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);font-weight:700}
.equivalence-box strong{font:1.12rem/1.4 var(--serif)}
.proof-map{margin:0;border-radius:12px;overflow:hidden;background:#f7f6ef;color:#344851;border:1px solid #d7d5c9}
.proof-map img{width:100%}
.proof-map figcaption{padding:14px 18px;border-top:1px solid #d7d5c9;font-size:12px;line-height:1.6}
.proof-map a,.paper-figure a{color:#1c6254}
.edition-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.edition-grid article{padding:22px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.edition-grid h3{font-size:1rem}
.edition-grid p{margin-bottom:0;color:var(--muted);font-size:14px}
.publication-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:30px;align-items:center;margin-block:28px 18px;padding:26px;border:1px solid #45675e;border-radius:12px;background:#1b2929}
.publication-card h3{font:1.5rem var(--serif);margin-bottom:9px}
.publication-card p{margin-bottom:0;color:var(--muted);max-width:76ch}
.publication-links{display:flex;flex-direction:column;align-items:stretch}
.publication-links .text-link{text-align:center}
.postmaster-page .section{scroll-margin-top:62px}
@media(max-width:900px){
 .postmaster-hero{grid-template-columns:minmax(0,1fr) 280px;gap:34px}
 .story-grid,.story-grid.reverse{grid-template-columns:1fr;gap:28px}
 .story-grid.reverse .story-copy,.story-grid.reverse .paper-figure{grid-column:1;grid-row:auto}
 .paper-figure{max-width:680px}
 .publication-card{grid-template-columns:1fr}
 .publication-links{align-items:flex-start}
}
@media(max-width:680px){
 .postmaster-hero{grid-template-columns:1fr;padding:30px 0 38px}
 .postmaster-cover{width:min(82%,390px);margin-inline:auto;order:-1}
 .postmaster-hero-copy .actions>.button{flex:1 1 180px}
 .depth-grid,.chapter-grid,.boundary-grid,.edition-grid{grid-template-columns:1fr}
 .depth-card,.chapter-card,.boundary-panel{padding:21px}
 .summary-link,.boundary-bottom{align-items:stretch;flex-direction:column}
 .summary-link .button{width:100%}
 .equation-path{gap:9px;padding:20px 12px}
 .equation-path b{flex-basis:100%;transform:rotate(90deg)}
 .publication-card{padding:21px}
 .postmaster-nav .container{width:100%;padding-inline:12px}
 .paper-figure figcaption,.proof-map figcaption{font-size:11px}
}
@media print{
 .postmaster-nav{display:none}
 .postmaster-hero{grid-template-columns:1fr 220px;gap:25px;padding-top:0}
 .depth-card,.chapter-card,.boundary-panel,.edition-grid article,.publication-card{background:#fff;color:#111;break-inside:avoid}
 .postmaster-cover,.paper-figure,.proof-map{box-shadow:none}
 .postmaster-page .muted,.postmaster-page p,.postmaster-page li{color:#222}
 .math-inline{color:#111}
}