/* Landing page. Dark and technical; one accent (teal) for interaction, and the
   medallion colours used only where they mean something: the lineage zones. */
:root {
  --bg: #0a0d12;
  --panel: #10151c;
  --panel-2: #141b24;
  --line: #1e2732;
  --line-2: #2a3542;
  --text: #d8dee6;
  --bright: #f1f5f9;
  --muted: #8592a3;
  --dim: #5b6676;
  --accent: #5eead4;
  --accent-dim: rgba(94, 234, 212, 0.12);
  --raw: #94a3b8;
  --bronze: #d6935a;
  --silver: #c9d2dc;
  --gold: #eac45c;
  --exposure: #5eead4;
  --warn: #f2b15b;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Inter, Roboto, sans-serif;
  --radius: 10px;
  --max: 1160px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background:
    radial-gradient(900px 480px at 78% -8%, rgba(94, 234, 212, 0.09), transparent 70%),
    radial-gradient(rgba(148, 163, 184, 0.07) 1px, transparent 1px) 0 0 / 22px 22px,
    var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, .btn:focus-visible, .node:focus-visible, .adr:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.05em 0.35em;
  color: var(--bright);
}

/* ---- top bar ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem max(1.25rem, calc((100vw - var(--max)) / 2));
  background: rgba(10, 13, 18, 0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.88rem;
}
.brand { color: var(--bright); font-weight: 600; }
.brand .prompt { color: var(--accent); }
.topbar > nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.topbar > nav a { color: var(--muted); }
.topbar > nav a:hover { color: var(--bright); text-decoration: none; }

.menu { display: none; position: relative; }
.menu summary {
  list-style: none;
  cursor: pointer;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--line-2);
  border-radius: 6px;
  color: var(--muted);
}
.menu summary::-webkit-details-marker { display: none; }
.menu summary::after { content: " ▾"; }
.menu[open] summary { color: var(--bright); border-color: var(--accent); }
.menu[open] summary::after { content: " ▴"; }
.menu summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.menu nav {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  display: flex;
  flex-direction: column;
  min-width: 12rem;
  padding: 0.35rem;
  background: var(--panel);
  border: 1px solid var(--line-2);
  border-radius: 8px;
  box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.9);
}
.menu nav a { padding: 0.65rem 0.75rem; border-radius: 5px; color: var(--text); }
.menu nav a:hover { background: var(--panel-2); color: var(--bright); text-decoration: none; }

main { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

/* ---- hero ---- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 2.5rem;
  align-items: center;
  padding: 5.5rem 0 3rem;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}
h1 {
  font-size: clamp(2.3rem, 5vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--bright);
  margin: 0 0 1.4rem;
  font-weight: 700;
}
.accent { color: var(--accent); }
.lede { color: var(--muted); font-size: 1.1rem; max-width: 36rem; margin: 0 0 2rem; }
.ctas { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 0.7rem 1rem;
  white-space: nowrap;
  border-radius: 8px;
  border: 1px solid var(--line-2);
  background: var(--panel);
  color: var(--bright);
  font-family: var(--mono);
  font-size: 0.86rem;
  transition: border-color 0.15s, transform 0.15s;
}
.btn:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #04211c; font-weight: 600; }
.btn-primary:hover { background: #7ff0dc; }
.btn-ghost { background: transparent; color: var(--muted); }

.terminal {
  position: relative;
  margin: 0;
  padding: 2.6rem 1.4rem 1.4rem;
  background: var(--panel-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(94, 234, 212, 0.04);
  font: 0.84rem/1.85 var(--mono);
  color: var(--text);
  /* A wrapped row would land its tail under the key column; scroll instead. */
  white-space: pre;
  overflow-x: auto;
}
.t-dots { position: absolute; top: 0.9rem; left: 1rem; display: flex; gap: 6px; }
.t-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.t-cmd::before { content: "$ "; color: var(--accent); }
.t-cmd { color: var(--bright); }
.t-key {
  display: inline-block;
  width: 7.5em;
  color: var(--dim);
}
.t-key::before { content: "✓ "; color: var(--accent); }

/* ---- stats ---- */
.stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}
.stat { padding: 1.4rem 1.3rem; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.stat:last-child { border-right: 0; }
.stat-n { font: 700 2.2rem/1 var(--mono); color: var(--bright); letter-spacing: -0.03em; }
.stat-label { margin-top: 0.55rem; color: var(--text); font-weight: 600; font-size: 0.93rem; }
.stat-note { color: var(--dim); font-size: 0.8rem; }

/* ---- sections ---- */
.block { padding: 5rem 0 0; }
/* Keeps a jumped-to heading clear of the sticky top bar. */
section[id] { scroll-margin-top: 3.5rem; }
h2 {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  flex-wrap: wrap;
  font-size: 1.65rem;
  letter-spacing: -0.02em;
  color: var(--bright);
  margin: 0 0 0.9rem;
}
.sec-n { font: 500 0.82rem var(--mono); color: var(--accent); }
.sec-sub { font: 400 0.82rem var(--mono); color: var(--dim); }
.sec-lede { color: var(--muted); max-width: 46rem; margin: 0 0 1.8rem; }
.more { display: inline-block; margin-top: 0.4rem; font-family: var(--mono); font-size: 0.86rem; }

/* ---- lineage ---- */
.lineage {
  display: grid;
  grid-template-columns: repeat(5, minmax(150px, 1fr));
  gap: 1.6rem;
  overflow-x: auto;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.zone { --z: var(--raw); position: relative; display: flex; flex-direction: column; min-width: 0; }
.zone-bronze { --z: var(--bronze); }
.zone-silver { --z: var(--silver); }
.zone-gold { --z: var(--gold); }
.zone-exposures { --z: var(--exposure); }
.zone:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -1.2rem;
  top: 50%;
  color: var(--line-2);
  font-size: 1.1rem;
  font-family: var(--mono);
}
.zone-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 0.55rem;
  margin-bottom: 0.7rem;
  border-bottom: 2px solid var(--z);
  font-family: var(--mono);
}
.zone-name { color: var(--z); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.78rem; }
.zone-count { color: var(--dim); font-size: 0.78rem; }
.zone-nodes { display: flex; flex-direction: column; gap: 0.38rem; flex: 1; justify-content: center; }
.node {
  display: block;
  padding: 0.32rem 0.55rem;
  border: 1px solid var(--line-2);
  border-left: 3px solid var(--z);
  border-radius: 5px;
  background: var(--panel-2);
  color: var(--text);
  font: 0.74rem/1.35 var(--mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: border-color 0.15s, background 0.15s;
}
.node:hover { border-color: var(--z); background: #18212c; text-decoration: none; color: var(--bright); }

/* ---- decision cards ---- */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.card {
  display: flex;
  flex-direction: column;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 0.15s;
}
.card:hover { border-color: var(--line-2); }
.card h3 { margin: 0 0 0.6rem; color: var(--bright); font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.93rem; }
.card .chips { margin-top: auto; padding-top: 1rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.chips a {
  font: 0.72rem var(--mono);
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  color: var(--accent);
}
.chips a:hover { border-color: var(--accent); background: var(--accent-dim); text-decoration: none; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.split p, .callout p { color: var(--muted); margin: 0 0 0.6rem; }

.callout > * { max-width: 52rem; }
.callout {
  margin-top: 5rem;
  padding: 2.2rem 2.4rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--warn);
  border-radius: var(--radius);
  background: radial-gradient(640px 260px at 0 50%, rgba(242, 177, 91, 0.07), transparent 70%), var(--panel);
}
.callout .sec-n { color: var(--warn); }
.versus { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.4rem 0; }
.side {
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  background: var(--panel-2);
}
.side h3 { display: flex; flex-wrap: wrap; align-items: center; gap: 0.3rem 0.6rem; margin: 0 0 0.5rem; color: var(--bright); font-size: 1rem; }
.callout .side p { margin: 0; font-size: 0.93rem; }
.status { font: 400 0.72rem var(--mono); padding: 0.08rem 0.45rem; border-radius: 999px; border: 1px solid; white-space: nowrap; }
.status-live { color: var(--accent); border-color: rgba(94, 234, 212, 0.35); }
.status-built { color: var(--warn); border-color: rgba(242, 177, 91, 0.4); }
.next { color: var(--muted); margin: 0 0 1rem; padding-left: 1.6rem; }
.next li { margin-bottom: 0.35rem; }
.next li::marker { color: var(--warn); font-family: var(--mono); }

/* ---- decision log ---- */
.adrs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.45rem 1rem; }
.adr {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr) auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  color: var(--text);
  font-size: 0.88rem;
}
.adr:hover { border-color: var(--accent); text-decoration: none; }
.adr-n { font-family: var(--mono); color: var(--dim); }
.adr-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.adr-meta { display: flex; gap: 0.5rem; align-items: center; font: 0.72rem var(--mono); color: var(--dim); }
.adr-superseded .adr-title { color: var(--dim); text-decoration: line-through; text-decoration-color: var(--line-2); }
.adr-note { color: var(--accent); }
.pill { padding: 0.08rem 0.45rem; border-radius: 999px; border: 1px solid var(--line-2); }
.pill-accepted { color: var(--accent); border-color: rgba(94, 234, 212, 0.35); }
.pill-proposed { color: var(--warn); border-color: rgba(242, 177, 91, 0.4); }
.pill-superseded { color: var(--dim); }

/* ---- market charts (scripts/site_charts.py) ----
   One series per chart, so one mark colour. --series is a darker step of the
   accent: the UI teal is too light for data marks on this surface (it fails the
   dataviz lightness band); #16a394 passes it and clears 3:1 contrast. */
.tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.tile {
  display: flex;
  flex-direction: column;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.tile-n { font-size: 2rem; font-weight: 700; color: var(--bright); letter-spacing: -0.02em; line-height: 1.1; }
.tile-label { color: var(--muted); font-size: 0.85rem; margin-top: 0.3rem; }

.viz-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; align-items: start; }
.viz {
  --series: #16a394;
  margin: 0;
  padding: 1.3rem 1.3rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  min-width: 0;
}
.viz:first-child { grid-column: 1 / -1; }
.viz-col { display: flex; flex-direction: column; gap: 1rem; min-width: 0; }
.viz figcaption h3 { margin: 0; color: var(--bright); font-size: 1rem; }
.viz figcaption p { margin: 0.15rem 0 0.9rem; color: var(--dim); font-size: 0.84rem; }
.chart { display: block; width: 100%; height: auto; overflow: visible; }
.chart-narrow { display: none; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .guide { stroke: var(--line-2); stroke-width: 1; }
.chart .tick { fill: var(--dim); font: 11px var(--mono); font-variant-numeric: tabular-nums; }
.chart .label { fill: var(--text); font: 12px var(--sans); }
.chart .value { fill: var(--muted); font: 11px var(--mono); font-variant-numeric: tabular-nums; }
.chart .line { fill: none; stroke: var(--series); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .area { fill: var(--series); fill-opacity: 0.1; }
.chart .dot { fill: var(--series); stroke: var(--panel); stroke-width: 2; }
.chart .mark { fill: var(--series); }
.chart .hit { fill: transparent; }
.chart .hit:hover { fill: rgba(148, 163, 184, 0.06); }
.chart .bar:hover .mark { fill: #1bbba9; }
.chart .bar:hover .value { fill: var(--bright); }
.viz-empty { color: var(--dim); font-size: 0.9rem; }
.viz-note { color: var(--dim); font-size: 0.8rem; margin: 1rem 0 0; }

.table-view { margin-top: 0.6rem; font-size: 0.8rem; }
.table-view summary { cursor: pointer; color: var(--dim); font-family: var(--mono); }
.table-view summary:hover { color: var(--accent); }
.table-view table { width: 100%; margin-top: 0.6rem; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.table-view th, .table-view td { padding: 0.3rem 0.5rem; border-bottom: 1px solid var(--line); text-align: left; }
.table-view th { color: var(--muted); font-weight: 600; }
.table-view td { color: var(--text); }

/* ---- footer ---- */
.footer {
  max-width: var(--max);
  margin: 6rem auto 0;
  padding: 2rem 1.25rem 3rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font: 0.8rem var(--mono);
}

/* ---- responsive ---- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; padding-top: 3.5rem; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(even) { border-right: 0; }
  .stat:nth-child(odd):last-child { grid-column: 1 / -1; border-bottom: 0; }
  .cards { grid-template-columns: 1fr 1fr; }
  .adrs { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 0; }
  .split > div + div { padding-top: 4rem; }
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .viz-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .cards { grid-template-columns: 1fr; }
  .topbar > nav { display: none; }
  .menu { display: block; }
  .callout { padding: 1.6rem; }
  .versus { grid-template-columns: 1fr; }
  .chart-wide { display: none; }
  .chart-narrow { display: block; }
  .adr { grid-template-columns: 2.6rem minmax(0, 1fr); }
  .adr-meta { grid-column: 2; }
}