@charset "utf-8";

/* The whitepaper page. Black and white like the rest of the site; green/red only for profit and loss.
   Type: Avenir for reading text; Berkeley Mono for headings, labels and anything technical
   (numbers, charts, tables, calculations, controls). KaTeX keeps its own fonts for the maths.
   Sizes are in px because the site's root font-size shrinks with the viewport. */

.wp {
  --ink: #fff;
  --ink-2: rgba(255, 255, 255, 0.78);
  --ink-3: rgba(255, 255, 255, 0.54);
  --ink-4: rgba(255, 255, 255, 0.32);
  --line: rgba(255, 255, 255, 0.1);
  --line-2: rgba(255, 255, 255, 0.06);
  --card: #0b0b0c;
  --mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Avenir", "Avenir Next", system-ui, -apple-system, sans-serif;
  --gutter: clamp(16px, 5vw, 56px);
  color: var(--ink-2);
  font: 400 17px/1.7 var(--sans);
}
.wp *:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.wp a:not(.btn) { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(255, 255, 255, 0.35); }
.wp a:not(.btn):hover { text-decoration-color: #fff; }
.wp b { color: var(--ink); font-weight: 400; }
.wp em { font-style: italic; }

/* one centred column */
.wp-col { position: relative; max-width: 800px; margin: 0 auto; padding: 0 var(--gutter); box-sizing: content-box; }

/* ---------- hero ---------- */
.wp-hero { position: relative; padding: 140px 0 24px; overflow: hidden; }
.wp-hero .glow {
  position: absolute; left: 50%; top: -30vw; width: min(1400px, 170vw); aspect-ratio: 1.6; transform: translateX(-50%);
  pointer-events: none; filter: blur(30px);
  background: radial-gradient(closest-side, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.04) 45%, transparent 75%);
}
.wp-kicker { font: 400 13px/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.wp-hero h1 { margin: 18px 0 20px; color: var(--ink); font: 400 clamp(38px, 5.2vw, 64px)/1.04 var(--mono); letter-spacing: -0.035em; text-wrap: balance; }
.wp-lede { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.55; color: var(--ink-2); }
.wp-meta { margin-top: 18px; font-size: 14px; color: var(--ink-3); }
.wp-meta b { color: var(--ink-2); }
.wp-btns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.wp .wp-btns .btn { text-decoration: none; }

/* ---------- sections ---------- */
.wp-sec { padding: 52px 0 8px; scroll-margin-top: 90px; }
.wp-sec + .wp-sec { border-top: 1px solid var(--line-2); }
.wp-sec > .wp-kicker { margin-bottom: 10px; }
.wp h2 { color: var(--ink); font: 400 clamp(28px, 3vw, 38px)/1.12 var(--mono); letter-spacing: -0.03em; text-wrap: balance; margin-bottom: 20px; }
.wp h3 { color: var(--ink); font: 400 19px/1.3 var(--mono); letter-spacing: -0.015em; margin: 34px 0 10px; }
.wp-sec p + p { margin-top: 14px; }
.wp-sec ul, .wp-sec ol.list { margin: 14px 0; padding-left: 22px; }
.wp-sec ul { list-style: disc; }
.wp-sec ol.list { list-style: decimal; }
.wp-sec li { margin: 8px 0; padding-left: 4px; }
.wp-sec li::marker { color: var(--ink-4); }

/* ---------- maths ---------- */
.wp .katex { color: var(--ink); font-size: 1.06em; }
.wp .katex-display { margin: 20px 0; padding: 4px 2px; overflow-x: auto; overflow-y: hidden; }
.wp .katex-display > .katex { white-space: nowrap; }
.eq-box { margin: 20px 0; padding: 2px 22px; border-radius: 18px; background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1); }
.eq-box .cap { display: block; padding-top: 14px; font: 400 12px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }
.note { margin-top: 20px; padding-left: 16px; border-left: 2px solid var(--line); color: var(--ink-3); font-size: 15px; }
details.derive { margin: 16px 0; border-radius: 16px; background: rgba(255, 255, 255, 0.03); }
details.derive > summary { cursor: pointer; list-style: none; padding: 12px 18px; font: 400 14px/1.3 var(--mono); color: var(--ink-3); }
details.derive > summary::-webkit-details-marker { display: none; }
details.derive > summary::before { content: "+"; display: inline-block; width: 18px; }
details.derive[open] > summary::before { content: "−"; }
details.derive > summary:hover { color: var(--ink); }
details.derive > div { padding: 0 18px 14px; }

/* ---------- figures ---------- */
.fig {
  position: relative; margin: 28px 0; padding: 22px; border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.012)), var(--card);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.09);
}
.fig-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 20px; margin-bottom: 12px; }
.fig-title { font: 400 15px/1.35 var(--mono); color: var(--ink); }
.fig-sub { font-size: 14px; color: var(--ink-3); }
.fig figcaption { margin-top: 14px; font-size: 14px; line-height: 1.55; color: var(--ink-3); }
.chart { position: relative; width: 100%; touch-action: pan-y; }
.chart svg { display: block; width: 100%; overflow: visible; }
.chart text { font: 400 11px/1 var(--mono); fill: var(--ink-3); }
.chart .lbl { fill: var(--ink-2); }
.chart .lbl-strong { fill: var(--ink); }
.chart .axis { stroke: rgba(255, 255, 255, 0.16); stroke-width: 1; shape-rendering: crispEdges; }
.chart .grid { stroke: rgba(255, 255, 255, 0.06); stroke-width: 1; shape-rendering: crispEdges; }
@media (max-width: 620px) { .fig { padding: 16px 14px; border-radius: 20px; } .chart text { font-size: 10px; } }

.tip {
  font-family: var(--mono);
  position: absolute; z-index: 5; pointer-events: none; min-width: 170px; max-width: 250px; padding: 10px 12px; border-radius: 12px;
  background: rgba(20, 20, 22, 0.94); box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  font-size: 13px; line-height: 1.45; color: var(--ink-2); opacity: 0; transition: opacity 0.12s;
}
.tip.on { opacity: 1; }
.tip b { display: block; margin-bottom: 4px; font: 400 13px/1.3 var(--mono); color: var(--ink); }
.tip div { display: flex; justify-content: space-between; gap: 14px; }
.tip span:last-child { font-family: var(--mono); color: var(--ink); font-variant-numeric: tabular-nums; }

.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; font: 400 12px/1.4 var(--mono); color: var(--ink-3); }
.legend span { display: inline-flex; align-items: center; gap: 8px; }
.legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* controls */
.ctrls { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin: 4px 0 14px; }
.ctrl { display: flex; align-items: center; gap: 12px; flex: 1 1 260px; min-width: 0; font: 400 13px/1.3 var(--mono); color: var(--ink-3); }
.ctrl label { white-space: nowrap; }
.ctrl output { font: 400 14px/1 var(--mono); color: var(--ink); min-width: 48px; text-align: right; font-variant-numeric: tabular-nums; }
.wp input[type="range"] { flex: 1; min-width: 80px; height: 28px; appearance: none; -webkit-appearance: none; background: transparent; cursor: pointer; }
.wp input[type="range"]::-webkit-slider-runnable-track { height: 4px; border-radius: 4px; background: rgba(255, 255, 255, 0.16); }
.wp input[type="range"]::-moz-range-track { height: 4px; border-radius: 4px; background: rgba(255, 255, 255, 0.16); }
.wp input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; margin-top: -7px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.6); }
.wp input[type="range"]::-moz-range-thumb { width: 18px; height: 18px; border: 0; border-radius: 50%; background: #fff; }
.wp select, .wp input[type="number"] {
  appearance: none; -webkit-appearance: none; height: 36px; padding: 0 12px; border-radius: 10px; border: 0;
  background: rgba(255, 255, 255, 0.07); color: var(--ink); font: 400 14px/1 var(--mono); box-shadow: inset 0 0 0 1px var(--line);
}
.wp input[type="number"] { width: 92px; }

.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; border-radius: 999px; background: rgba(255, 255, 255, 0.05); }
.seg button {
  appearance: none; border: 0; cursor: pointer; height: 34px; padding: 0 14px; border-radius: 999px; background: transparent;
  color: var(--ink-3); font: 400 13px/1 var(--mono); white-space: nowrap; transition: color 0.15s, background 0.15s;
}
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] { color: var(--ink); background: linear-gradient(180deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.08)); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18); }
@media (max-width: 520px) { .seg button { padding: 0 10px; } }
.wbtn { appearance: none; border: 0; cursor: pointer; height: 38px; padding: 0 20px; border-radius: 999px; font: 400 14px/1 var(--mono); background: #fff; color: #000; }
.wbtn.ghost { background: rgba(255, 255, 255, 0.08); color: var(--ink); }

/* stat cards */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: 14px 0 4px; }
.stats > div, .quote > div { padding: 12px 14px; border-radius: 14px; background: rgba(255, 255, 255, 0.04); min-width: 0; }
.stats dt, .quote dt { font: 400 12px/1.3 var(--mono); color: var(--ink-3); }
.stats dd, .quote dd { margin-top: 4px; font: 400 18px/1.2 var(--mono); color: var(--ink); overflow-wrap: anywhere; }
.stats dd small, .quote dd small { display: block; margin-top: 2px; font: 400 12px/1.3 var(--sans); color: var(--ink-3); }
@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } .stats dd { font-size: 16px; } }

.story { margin-top: 14px; padding: 14px 18px; border-radius: 16px; background: rgba(255, 255, 255, 0.035); font-size: 15.5px; line-height: 1.6; }
.sandbox { display: none; margin-top: 12px; padding: 16px 18px; border-radius: 16px; background: rgba(255, 255, 255, 0.035); }
.sandbox.on { display: block; }
.sandbox .row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; font-size: 14px; color: var(--ink-3); }
.quote { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 14px; }
@media (max-width: 620px) { .quote { grid-template-columns: 1fr; } }

/* tables */
.tbl-wrap { max-width: 100%; overflow-x: auto; margin: 18px 0; -webkit-overflow-scrolling: touch; }
.tbl { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.tbl th { padding: 9px 10px; text-align: left; font: 400 12px/1.3 var(--mono); color: var(--ink-3); border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl td { padding: 9px 10px; border-bottom: 1px solid var(--line-2); color: var(--ink-2); }
.tbl td.n, .tbl th.n { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.tbl td.n { color: var(--ink); }
.tbl caption { caption-side: bottom; padding-top: 10px; text-align: left; font-size: 13px; color: var(--ink-3); }
details.tview { margin-top: 12px; }
details.tview > summary { cursor: pointer; font: 400 13px/1.3 var(--mono); color: var(--ink-3); list-style: none; }
details.tview > summary::-webkit-details-marker { display: none; }
details.tview > summary:hover { color: var(--ink); }

/* ensemble diagram */
.ens { display: grid; grid-template-columns: minmax(0, 1.2fr) 36px minmax(0, 1fr) 36px minmax(0, 1fr); align-items: center; }
.ens-nodes { display: grid; gap: 8px; }
.node { padding: 10px 12px; border-radius: 12px; background: rgba(255, 255, 255, 0.05); }
.node b { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 7px; font: 400 13px/1.3 var(--mono); color: var(--ink); }
.node b span { color: var(--ink-3); }
.node .w { height: 4px; border-radius: 4px; background: rgba(255, 255, 255, 0.1); overflow: hidden; }
.node .w i { display: block; height: 100%; background: #fff; border-radius: 4px; }
.ens-arrow { display: flex; align-items: center; justify-content: center; color: var(--ink-4); font: 400 18px/1 var(--mono); }
.ens-core { padding: 18px 12px; border-radius: 18px; text-align: center; background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.03)); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2); }
.ens-core b { display: block; font: 400 14px/1.3 var(--mono); color: var(--ink); margin-bottom: 6px; }
.ens-core small { display: block; font-size: 12.5px; color: var(--ink-3); line-height: 1.45; }
.ens-out { padding: 12px; border-radius: 14px; background: rgba(255, 255, 255, 0.04); }
.ens-out b { font: 400 13px/1.3 var(--mono); color: var(--ink); }
.ens-out svg { display: block; width: 100%; height: 80px; margin-top: 8px; }
@media (max-width: 700px) {
  .ens { grid-template-columns: 1fr; }
  .ens-arrow { height: 32px; transform: rotate(90deg); }
}

/* references */
.refs { list-style: none; display: grid; gap: 8px; font-size: 14px; line-height: 1.55; color: var(--ink-3); }
.refs li { display: grid; grid-template-columns: 34px minmax(0, 1fr); }
.refs li > i { font: 400 12px/1.9 var(--mono); font-style: normal; color: var(--ink-4); }
.refs em { color: var(--ink-2); }

.end-cta { margin: 40px 0 12px; padding: 28px; border-radius: 24px; background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.015)); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1); }
.end-cta h3 { margin-top: 0; }
.wp-sec#references { padding-bottom: 40px; }

/* ---------- executive summary ---------- */
.wp [hidden] { display: none !important; }
.wp .muted { color: var(--ink-3); }
.wp .up { color: #16c77c; }
.wp .down { color: #e8404c; }
.wp .lead { font-size: 19px; line-height: 1.6; color: var(--ink); }
.abstract p { font-size: 18px; line-height: 1.75; color: var(--ink); }
.abstract p + p { margin-top: 16px; }

/* ---------- life cycle ---------- */
ol.lifecycle { list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: 8px 0 0; padding: 0 !important; counter-reset: lc; }
ol.lifecycle li { margin: 0 !important; padding: 16px !important; border-radius: 16px; background: rgba(255, 255, 255, 0.04); counter-increment: lc; }
ol.lifecycle li b { display: block; font: 400 15px/1.3 var(--mono); color: var(--ink); margin-bottom: 6px; }
ol.lifecycle li b::before { content: counter(lc) " · "; color: var(--ink-4); }
ol.lifecycle li p { font-size: 14.5px; line-height: 1.55; color: var(--ink-3); }
@media (max-width: 760px) { ol.lifecycle { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { ol.lifecycle { grid-template-columns: 1fr; } }

/* ---------- the open-to-payout demo ---------- */
ol.phases { list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; margin: 0 0 16px; padding: 0 !important; }
ol.phases li { margin: 0 !important; padding: 8px 0 0 !important; border-top: 2px solid rgba(255, 255, 255, 0.12); font: 400 12px/1.2 var(--mono); letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-4); }
ol.phases li.done { border-top-color: rgba(255, 255, 255, 0.45); color: var(--ink-3); }
ol.phases li.on { border-top-color: #fff; color: var(--ink); }
.fig .panel { margin-bottom: 14px; }
.fig .row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; font: 400 13px/1.4 var(--mono); }
.fig .row + .row { margin-top: 10px; }
.fig .calc { margin-top: 12px; padding: 12px 14px; border-radius: 12px; background: rgba(255, 255, 255, 0.04); font: 400 13px/1.7 var(--mono); color: var(--ink-2); }
.fig .calc b { font-family: var(--mono); font-weight: 400; color: var(--ink); }
.wp input#life-n { width: 88px; }
.wbtn.sm { height: 34px; padding: 0 14px; font-size: 13px; }
.wbtn:disabled { opacity: 0.35; cursor: default; }
.tbl tr.op td { border-top: 1px solid var(--line); color: var(--ink); }
.fig .legend + .panel { margin-top: 16px; }