/* Case-study page. Rules carried over from the z-nile Pipeline Map, scoped under .zn so they sit on top of site.css. */
.zn .wrap { max-width: 1120px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); padding-block: 40px 64px; display: grid; gap: 56px; }
.zn h1, .zn h2, .zn h3 { font-family: var(--display); text-wrap: balance; margin: 0; line-height: 1.15; }
.zn h1 { font-size: clamp(2.1rem, 5vw, 3.2rem); font-weight: 700; letter-spacing: -0.01em; }
.zn h2 { font-size: 1.6rem; font-weight: 700; }
.zn h3 { font-size: 1.2rem; font-weight: 700; }
.zn p { margin: 0; }
.zn code, .zn .mono { font-family: var(--mono); font-size: 0.86em; }
.zn code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere; }
.zn .eyebrow { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--water); font-weight: 500; }
.zn .lede { max-width: 66ch; font-size: 1.08rem; color: var(--muted); }
.zn .lede strong { color: var(--ink); font-weight: 600; }
.zn section { display: grid; gap: 20px; min-width: 0; }
.zn .section-head { display: grid; gap: 6px; max-width: 70ch; }
.zn .section-head p { color: var(--muted); }
.zn header { display: grid; gap: 18px; }
.zn .facts { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 6px 0 0; padding: 14px 0 0; border-top: 1px solid var(--line); list-style: none; }
.zn .facts li { display: flex; align-items: baseline; gap: 7px; font-size: 0.9rem; color: var(--muted); }
.zn .facts b { font-family: var(--mono); font-weight: 500; color: var(--ink); font-variant-numeric: tabular-nums; font-size: 1rem; }
.zn .route { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.zn .route-grid { min-width: 860px; display: grid; grid-template-columns: 112px repeat(5, minmax(0, 1fr)); }
.zn .route-grid > div { padding: 10px 12px; border-top: 1px solid var(--line); font-size: 0.86rem; min-width: 0; }
.zn .route-grid > .rowlabel { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); border-right: 1px solid var(--line); display: flex; align-items: center; }
.zn .route-grid > .corner { border-top: 0; border-right: 1px solid var(--line); }
.zn .station { border-top: 0 !important; position: relative; padding: 18px 12px 14px !important; display: grid; gap: 4px; text-decoration: none; color: inherit; }
.zn .station::before { content: ""; position: absolute; left: 0; right: 0; top: 33px; height: 6px; background: var(--water-soft); }
.zn .station:first-of-type::before { left: 24px; }
.zn .station .dot { position: relative; width: 26px; height: 26px; border-radius: 50%; background: var(--water); color: var(--surface); font-family: var(--mono); font-size: 0.8rem; font-weight: 500; display: grid; place-items: center; }
.zn .station .sname { font-family: var(--display); font-weight: 700; font-size: 1.15rem; margin-top: 6px; }
.zn .station .scmd { font-family: var(--mono); font-size: 0.78rem; color: var(--water); }
.zn a.station:hover .sname, .zn a.station:focus-visible .sname { text-decoration: underline; text-underline-offset: 3px; }
.zn a.station:focus-visible { outline: 2px solid var(--water); outline-offset: -2px; }
.zn .state { font-family: var(--mono); font-size: 0.78rem; }
.zn .state .arrow { color: var(--muted); }
.zn .pill { display: inline-block; font-family: var(--mono); font-size: 0.72rem; padding: 1px 7px; border-radius: 999px; background: var(--sand-soft); color: var(--sand); white-space: nowrap; }
.zn .pill.water { background: var(--water-soft); color: var(--water); }
.zn .none { color: var(--muted); }
.zn .offramp { grid-column: 5 / 7; border-top: 1px dashed var(--line) !important; font-size: 0.82rem; color: var(--muted); }
.zn .offramp b { font-family: var(--mono); font-weight: 500; color: var(--ink); }
.zn .stages { display: grid; gap: 22px; }
.zn .stage { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; scroll-margin-top: 16px; }
.zn .stage-top { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; align-items: start; padding: 20px 22px 16px; border-bottom: 1px solid var(--line); }
.zn .stage-num { grid-row: span 2; width: 40px; height: 40px; border-radius: 50%; background: var(--water); color: var(--surface); display: grid; place-items: center; font-family: var(--mono); font-weight: 500; }
.zn .stage-num.off { background: transparent; color: var(--muted); border: 1.5px dashed var(--muted); }
.zn .stage-title { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.zn .stage-title .scmd { font-family: var(--mono); font-size: 0.85rem; color: var(--water); }
.zn .stage-job { color: var(--muted); max-width: 78ch; }
.zn .lanes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.zn .lane { padding: 16px 22px 18px; min-width: 0; display: grid; gap: 8px; align-content: start; }
.zn .lane + .lane { border-left: 1px solid var(--line); }
.zn .lane h4 { margin: 0; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.zn .lane ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 7px; }
.zn .lane li { font-size: 0.88rem; line-height: 1.45; min-width: 0; }
.zn .lane li .note { color: var(--muted); }
.zn .to { color: var(--water); font-family: var(--mono); font-size: 0.8em; padding: 0 2px; }
.zn .stage-foot { display: flex; flex-wrap: wrap; gap: 8px 28px; padding: 12px 22px; background: var(--water-soft); font-size: 0.86rem; }
.zn .stage-foot span b { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--water); font-weight: 500; margin-right: 6px; }
.zn .phases { display: flex; flex-wrap: wrap; gap: 6px; padding: 14px 22px 0; list-style: none; margin: 0; counter-reset: ph -1; }
.zn .phases li { font-size: 0.8rem; padding: 3px 10px 3px 6px; border: 1px solid var(--line); border-radius: 6px; display: flex; gap: 6px; align-items: center; }
.zn .phases li::before { counter-increment: ph; content: counter(ph); font-family: var(--mono); font-size: 0.72rem; color: var(--surface); background: var(--water); border-radius: 4px; padding: 0 5px; }
.zn .stage.slim .stage-top { border-bottom: 0; }
.zn .matrix-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.zn table { border-collapse: collapse; width: 100%; min-width: 760px; font-size: 0.88rem; }
.zn th, .zn td { padding: 10px 12px; text-align: left; border-top: 1px solid var(--line); vertical-align: top; }
.zn thead th { border-top: 0; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); font-weight: 500; white-space: nowrap; }
.zn td.c { text-align: center; width: 84px; font-size: 1rem; }
.zn .yes { color: var(--water); }
.zn .some { color: var(--sand); }
.zn td .sub { display: block; color: var(--muted); font-size: 0.82rem; }
.zn td .n { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.zn .legend { display: flex; flex-wrap: wrap; gap: 6px 20px; font-size: 0.82rem; color: var(--muted); }
.zn .machines { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.zn .machine { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px 18px 16px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.zn .machine p { font-size: 0.9rem; color: var(--muted); }
.zn .machine ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.zn .machine li { font-size: 0.86rem; min-width: 0; }
.zn .anatomy { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.zn .tree { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px; min-width: 0; display: grid; gap: 12px; align-content: start; }
.zn .tree .path { font-family: var(--mono); font-size: 0.8rem; color: var(--water); overflow-wrap: anywhere; }
.zn .tree ul { margin: 0; padding: 0 0 0 14px; list-style: none; border-left: 2px solid var(--water-soft); display: grid; gap: 8px; }
.zn .tree li { display: grid; grid-template-columns: minmax(0, 15ch) minmax(0, 1fr); gap: 12px; font-size: 0.86rem; }
.zn .tree li code { background: none; padding: 0; color: var(--ink); }
.zn .tree li span { color: var(--muted); }
.zn .tree .after { font-size: 0.86rem; color: var(--muted); }
.zn .chain { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: ch; }
.zn .chain li { display: grid; grid-template-columns: 34px minmax(0, 22ch) minmax(0, 1fr); gap: 14px; align-items: baseline; padding: 12px 0; border-top: 1px solid var(--line); }
.zn .chain li::before { counter-increment: ch; content: counter(ch); font-family: var(--mono); font-size: 0.8rem; color: var(--water); }
.zn .chain .what { font-family: var(--mono); font-size: 0.84rem; overflow-wrap: anywhere; }
.zn .chain .why { color: var(--muted); font-size: 0.9rem; }
.zn .points { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 28px; margin: 0; padding: 0; list-style: none; }
.zn .points li { display: grid; gap: 4px; padding-top: 12px; border-top: 2px solid var(--water-soft); }
.zn .points b { font-family: var(--display); font-size: 1.02rem; }
.zn .points span { color: var(--muted); font-size: 0.9rem; }
.zn footer { color: var(--muted); font-size: 0.82rem; border-top: 1px solid var(--line); padding-top: 14px; }
@media (max-width: 860px) {
  .zn .lanes { grid-template-columns: minmax(0, 1fr); }
  .zn .lane + .lane { border-left: 0; border-top: 1px solid var(--line); }
  .zn .machines { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .zn .anatomy, .zn .points { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .zn .machines { grid-template-columns: minmax(0, 1fr); }
  .zn .chain li { grid-template-columns: 26px minmax(0, 1fr); }
  .zn .chain .why { grid-column: 2; }
  .zn .tree li { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .zn .stage-top, .zn .lane, .zn .stage-foot { padding-left: 16px; padding-right: 16px; }
  .zn .phases { padding-left: 16px; padding-right: 16px; }
}
.zn .section-head { margin-bottom: 0; }
.zn .facts { padding-top: 14px; }
.zn .back { font-family: var(--mono); font-size: 0.82rem; text-decoration: none; }
.zn .why { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--water); border-radius: 10px; padding: 18px 20px; max-width: 78ch; display: grid; gap: 8px; }
.zn .why p { color: var(--muted); }
.zn .why b { color: var(--ink); }