/* Public Transport research publication layer. Self-contained and portable. */
.transport-shell{max-width:1180px}.transport-hero{padding:86px 0 54px;position:relative}.transport-hero h1{font-size:clamp(44px,7vw,78px);line-height:.98;letter-spacing:-.06em;margin:0 0 24px;font-weight:620;max-width:1050px}.transport-hero .lede{max-width:850px}.transport-mark{font:11px ui-monospace,SFMono-Regular,Menlo,monospace;text-transform:uppercase;letter-spacing:.11em;color:var(--indigo);margin-bottom:16px}.transport-nav{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px}.transport-nav a{font-size:12px;text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:8px 12px;background:rgba(255,253,249,.7)}.transport-nav a:hover,.transport-nav a[aria-current=page]{border-color:var(--indigo);color:var(--indigo-strong)}
.transport-diagram{border:1px solid var(--indigo-line);border-radius:22px;background:linear-gradient(145deg,#fffdf9,#f0eef8);padding:26px;overflow:hidden}.transport-diagram svg{width:100%;height:auto;display:block}.transport-diagram text{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;fill:#4c4868}.transport-diagram .node{fill:#fffdf9;stroke:#9089bd;stroke-width:1.4}.transport-diagram .wire{stroke:#6c659d;stroke-width:1.8;fill:none}.transport-diagram .soft{stroke:#bcb7d5;stroke-dasharray:5 6}.transport-diagram .accent{fill:#514b8f}.transport-diagram .label{font-size:12px}.transport-diagram .small{font-size:10px;fill:#777286}
.transport-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.transport-card{border:1px solid var(--line);border-radius:18px;padding:24px;background:rgba(255,253,249,.66)}.transport-card h3{font-size:22px;letter-spacing:-.035em;margin:7px 0 10px;font-weight:620}.transport-card p{color:var(--muted);font-size:14px;line-height:1.65;margin:0}.transport-card .tag{font:10px ui-monospace,SFMono-Regular,Menlo,monospace;text-transform:uppercase;letter-spacing:.09em;color:var(--quiet)}.transport-card .arrow{margin-top:18px}.statement{font-size:clamp(28px,4.5vw,50px);line-height:1.08;letter-spacing:-.045em;font-weight:600;max-width:900px;margin:0}.statement em{font-style:normal;color:var(--indigo-strong)}
.ladder{display:grid;gap:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:rgba(255,253,249,.6)}.rung{display:grid;grid-template-columns:74px 1fr 1.2fr;gap:18px;padding:18px 20px;border-top:1px solid var(--line);align-items:start}.rung:first-child{border-top:0}.rung .n{font:11px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--indigo)}.rung strong{font-size:15px}.rung p{margin:0;color:var(--muted);font-size:13px;line-height:1.55}.boundary{border-left:2px solid var(--indigo);padding:2px 0 2px 17px;color:#55515f;max-width:830px}.boundary strong{color:var(--ink)}
.research-sequence{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.seq{border-top:1px solid var(--line);padding:17px 5px 8px}.seq .num{font:10px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--indigo);letter-spacing:.08em}.seq strong{display:block;font-size:16px;margin:5px 0}.seq p{margin:0;color:var(--muted);font-size:12px;line-height:1.55}
.equation{font:14px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;background:#f0eef8;border:1px solid var(--indigo-line);border-radius:12px;padding:14px 16px;overflow:auto;color:#403a76}.callout{border:1px solid var(--indigo-line);border-radius:18px;padding:24px;background:var(--panel)}.callout strong{display:block;font-size:20px;margin-bottom:8px}.callout p{margin:0;color:var(--muted);line-height:1.65}
.instrument-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.instrument{border:1px solid var(--line);border-radius:20px;padding:24px;background:var(--panel)}.instrument h2{font-size:24px;margin:4px 0 8px}.instrument p{font-size:13px;color:var(--muted);line-height:1.6}.controls{display:grid;gap:10px;margin:18px 0}.controls label{display:grid;gap:5px;font-size:12px;color:var(--muted)}select,.instrument button{font:inherit;border:1px solid #b7b2bc;border-radius:10px;background:#fffdf9;color:var(--ink);padding:9px 10px}.instrument button{cursor:pointer;text-align:left}.instrument button:hover{border-color:var(--indigo)}.receipt{background:#252330;color:#eeecf7;border-radius:14px;padding:16px;font:12px/1.55 ui-monospace,SFMono-Regular,Menlo,monospace;min-height:132px;white-space:pre-wrap}.status{display:inline-flex;padding:5px 8px;border-radius:999px;background:var(--indigo-soft);border:1px solid var(--indigo-line);font:10px ui-monospace,SFMono-Regular,Menlo,monospace;text-transform:uppercase;letter-spacing:.08em;color:var(--indigo-strong)}.status.warn{background:#f6efe4;border-color:#dfcba8;color:#76592b}.status.no{background:#f5eaea;border-color:#dfc2c2;color:#7b4040}
.path-viz{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:8px;align-items:center;margin:18px 0}.path-node{border:1px solid var(--indigo-line);border-radius:12px;padding:12px;text-align:center;background:#faf8ff;font-size:12px}.path-arrow{color:var(--indigo);font-size:18px}.tiny{font-size:11px;color:var(--quiet);line-height:1.55}.source-list{display:grid;gap:10px}.source-item{border-top:1px solid var(--line);padding:14px 2px}.source-item:first-child{border-top:0}.source-item strong{font-size:14px}.source-item p{font-size:12px;color:var(--muted);margin:4px 0 0}.source-item a{color:var(--indigo-strong)}
@media(max-width:820px){.transport-grid,.instrument-grid,.research-sequence{grid-template-columns:1fr}.rung{grid-template-columns:48px 1fr}.rung p{grid-column:2}.path-viz{grid-template-columns:1fr}.path-arrow{transform:rotate(90deg);text-align:center}.transport-hero{padding-top:60px}}