:root {
  --paper: #f7f4ee; --paper2: #efeae0; --line: #ddd5c6;
  --ink: #1f1d1a; --ink2: #3b3832; --muted: #6b655c; --faint: #8a8377;
  --clay: #c96442; --olive: #5B8C5A; --rust: #b5432f; --slate: #3E7CB1; --amber: #b7791f;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --w: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--slate); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--slate); outline-offset: 2px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 .5em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
.mono { font-family: var(--mono); font-size: .85em; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; border-radius: 6px; }
.skip:focus { left: 8px; z-index: 10; }

.c-clay { color: var(--clay); } .c-slate { color: var(--slate); } .c-olive { color: var(--olive); }
.bg-clay { background: var(--clay); } .bg-slate { background: var(--slate); } .bg-olive { background: var(--olive); }
.dot { display: inline-block; width: .6em; height: .6em; border-radius: 50%; margin-right: .5em; vertical-align: .05em; flex: none; }

/* header */
.top { max-width: var(--w); margin: 0 auto; padding: 22px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.mark { font: 700 1.5rem/1 var(--sans); letter-spacing: -0.03em; text-decoration: none; color: var(--ink); }
.mark-p { color: var(--clay); } .mark-c { color: var(--slate); } .mark-e { color: var(--olive); }
.top nav { display: flex; gap: 22px; align-items: center; font-size: .95rem; }
.top nav a { color: var(--ink2); text-decoration: none; }
.top nav a:hover { color: var(--clay); }
.nav-cta { border: 1.5px solid var(--ink); padding: 6px 14px; border-radius: 999px; }

main > section { max-width: var(--w); margin: 0 auto; padding: 64px 24px; }
.section-head { max-width: 760px; margin-bottom: 28px; }
.section-head p { color: var(--ink2); margin: 0; }

/* hero */
.hero { padding-top: 56px !important; }
.eyebrow { font: 600 .9rem/1 var(--mono); color: var(--muted); letter-spacing: .02em; margin: 0 0 22px; }
.hero h1 { font-size: clamp(2.2rem, 5.6vw, 4rem); max-width: 15ch; font-weight: 700; }
.lede { font-size: clamp(1.05rem, 1.8vw, 1.3rem); color: var(--ink2); max-width: 46rem; margin: 0 0 30px; }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; font: 600 1rem/1 var(--sans); padding: 14px 22px; border-radius: 999px; border: 1.5px solid var(--ink); color: var(--ink); background: transparent; text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--paper2); }
.btn-primary { background: var(--clay); border-color: var(--clay); color: #fff; }
.btn-primary:hover { background: #b65737; }
.pce-strip { list-style: none; padding: 0; margin: 48px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.pce-strip li { background: var(--paper); padding: 18px 20px; font-size: .95rem; color: var(--ink2); }
.pce-strip b { color: var(--ink); }

/* flow */
.stages { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.stage { font: 600 .95rem/1 var(--sans); padding: 10px 16px; border-radius: 999px; border: 1.5px solid var(--line); background: var(--paper); color: var(--ink2); cursor: pointer; display: inline-flex; align-items: center; }
.stage[aria-pressed="true"] { border-color: var(--ink); color: var(--ink); background: #fff; }
.caption { min-height: 3.2em; color: var(--ink2); margin: 0 0 12px; max-width: 820px; }
.graph-wrap { position: relative; margin: 0; background: #fffdf9; border: 1px solid var(--line); border-radius: 16px; padding: 10px; overflow: hidden; }
#flow-graph { display: block; width: 100%; height: auto; min-height: 260px; font-family: var(--sans); }
.status { display: block; padding: 8px 6px 2px; color: var(--muted); }
.sf-box { fill: #fff; stroke-width: 2; } .sf-clay { stroke: var(--clay); } .sf-slate { stroke: var(--slate); } .sf-olive { stroke: var(--olive); }
.sf-t { font: 700 22px var(--sans); text-anchor: middle; fill: var(--ink); }
.sf-s { font: 14px var(--sans); text-anchor: middle; fill: var(--muted); }
.sf-arrow { stroke: var(--faint); stroke-width: 2; fill: none; marker-end: none; }
.evidence-panel { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; margin: 8px 6px 0; padding: 12px 0 0; border-top: 1px solid var(--line); font-size: .8rem; }
.evidence-panel[hidden] { display: none; }
.evidence-panel div { display: grid; gap: 2px; }
.evidence-panel .k { color: var(--muted); }

/* traffic map */
.col-head { font: 700 11px var(--mono); letter-spacing: .12em; fill: var(--faint); }
.node-label { font-size: 13px; font-weight: 600; fill: var(--ink); paint-order: stroke; stroke: #fffdf9; stroke-width: 4px; stroke-linejoin: round; }
.node-note { font-size: 11px; fill: var(--muted); paint-order: stroke; stroke: #fffdf9; stroke-width: 4px; stroke-linejoin: round; }
.edge-label { font: 700 11px var(--mono); text-anchor: middle; paint-order: stroke; stroke: #fffdf9; stroke-width: 4px; stroke-linejoin: round; }
#flow-graph path { transition: stroke .5s, stroke-width .5s; }
.flow-rules { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 8px 6px 0; padding: 12px 0 0; border-top: 1px solid var(--line); font-size: .85rem; color: var(--ink2); }
.flow-rules[hidden] { display: none; }
.flow-rules b { color: var(--rust); font-family: var(--mono); margin-right: 4px; }
.ev-side { display: grid; gap: 10px; align-content: start; }
.matrix { border-collapse: separate; border-spacing: 3px; width: 100%; font: 12px var(--mono); margin-top: 4px; }
.matrix th { font: 600 11px var(--sans); color: var(--muted); text-align: left; padding: 3px 6px; background: none; text-transform: none; letter-spacing: 0; border: 0; }
.matrix td { text-align: center; padding: 5px 4px; border-radius: 5px; border: 0; background: transparent; white-space: nowrap; }
.m-warmup { background: #ece6da !important; color: var(--muted); }
.m-advise { background: #f6ead0 !important; color: #7a5410; }
.m-ready { background: #e2eedf !important; color: #2f5a2e; font-weight: 700; }
.m-rejected { background: #f5e3de !important; color: #8a4434; }
.m-x { background: transparent !important; color: var(--rust); }
.legend i.m-x { border: 1px dashed var(--rust); }
.legend { display: flex !important; flex-wrap: wrap; gap: 6px 14px; align-items: center; color: var(--muted); }
.legend i { display: inline-block; width: 14px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: middle; }
.small { font-size: .8rem; flex-basis: 100%; }

/* terminal mock */
.term { background: #1c1b19; color: #e9e4da; border-radius: 14px; overflow: hidden; box-shadow: 0 18px 50px rgba(31,29,26,.18); }
.term-bar { display: flex; align-items: center; gap: 7px; padding: 11px 14px; background: #2a2825; font: 12px var(--sans); color: #a49d90; }
.term-bar span { width: 11px; height: 11px; border-radius: 50%; background: #4a4640; }
.term-bar em { font-style: normal; margin-left: 10px; }
.term-body { margin: 0; padding: 20px 22px 24px; font: 13.5px/1.75 var(--mono); white-space: pre; overflow-x: auto; }
.t-dim { color: #8a8377; } .t-str { color: #e3b58f; } .t-hl { color: #f1d38a; }
.t-olive { color: #8fc28e; } .t-slate { color: #8fb6dc; } .t-amber { color: #f0b04a; }
.band { display: inline-block; margin-top: 6px; padding: 3px 8px; background: #2c2a26; border-radius: 4px; }
.caret { display: inline-block; width: .6em; height: 1.1em; background: #e9e4da; vertical-align: -.2em; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.note { color: var(--muted); font-size: .92rem; margin-top: 16px; }
.pill { display: inline-block; font: 600 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .05em; padding: 5px 8px; border-radius: 999px; background: #f3e1d7; color: #8e3f22; margin-right: 6px; }

/* thesis */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: #fff; border: 1px solid var(--line); border-top: 5px solid; border-radius: 14px; padding: 22px; }
.card h3 { font-size: 1.3rem; }
.card p { margin: 0 0 12px; color: var(--ink2); }
.card .where { font-size: .88rem; color: var(--muted); margin: 0; }
.card-clay { border-top-color: var(--clay); } .card-slate { border-top-color: var(--slate); } .card-olive { border-top-color: var(--olive); }

/* proof */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--paper2); vertical-align: top; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); background: var(--paper); }
tr:last-child td { border-bottom: 0; }
td:nth-child(3), td:nth-child(4) { white-space: nowrap; }
td:nth-child(4), td:nth-child(5) { color: var(--muted); }
.lbl { font: 700 .72rem/1 var(--mono); padding: 5px 7px; border-radius: 5px; letter-spacing: .03em; }
.lbl-PASS { background: #e2eedf; color: #2f5a2e; }
.lbl-PARTIAL { background: #f6ead0; color: #7a5410; }
.lbl-INCONCLUSIVE { background: #e6e9ef; color: #3a4a62; }
.lbl-BLOCKED { background: #f5dcd5; color: #8a2c1b; }

/* early */
.early { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: start; }
.early ul { padding-left: 1.2em; color: var(--ink2); }
.contact { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.contact .k { margin: 0; color: var(--muted); font-size: .9rem; }
.addr { font: 600 clamp(1.2rem, 2.4vw, 1.6rem)/1.3 var(--mono); margin: 4px 0 20px; word-break: break-all; }
.addr a { color: var(--ink); text-decoration: none; }
.copy-status { min-height: 1.4em; margin: 12px 0 0; color: var(--olive); font-size: .92rem; }

.foot { max-width: var(--w); margin: 0 auto; padding: 32px 24px 48px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 10px 28px; justify-content: space-between; font-size: .9rem; color: var(--ink2); }

@media (max-width: 860px) {
  .pce-strip, .cards, .early { grid-template-columns: 1fr; }
  .top nav a:not(.nav-cta) { display: none; }
  main > section { padding: 44px 18px; }
  .evidence-panel { grid-template-columns: 1fr; }
  .term-body { font-size: 11.5px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .caret { animation: none; }
  #flow-graph path { transition: none; }
}