/* VolaSet — an instrument, not a poster. Absolute black, white, hairlines, and a lot of air.
   Nothing rounded, nothing coloured: the only thing allowed to draw the eye is a number. */

:root {
  --bg: #000;
  --panel: #08080a;
  --line: #1c1c20;
  --line-2: #2a2a30;
  --ink: #ffffff;
  --dim: #8b8b93;
  --dimmer: #55555d;
  --up: #d8ffe0;
  --down: #ffd8d8;
  --shell: 1180px;
}

* { box-sizing: border-box; }
/* `overflow-x` on the body alone still leaves the document itself scrollable sideways by the width of
   the page gutter on narrow screens — measured, not assumed. Clip the root too. */
html { scroll-behavior: smooth; overflow-x: clip; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Public Sans", ui-sans-serif, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* the faint diagonals from the banner, printed once behind everything */
body::before {
  content: "";
  position: fixed;
  inset: -20%;
  pointer-events: none;
  z-index: 0;
  background:
    linear-gradient(115deg, transparent 48.6%, rgba(255,255,255,0.045) 48.8%, transparent 49%),
    linear-gradient(115deg, transparent 61.6%, rgba(255,255,255,0.03) 61.8%, transparent 62%),
    linear-gradient(-115deg, transparent 30.6%, rgba(255,255,255,0.035) 30.8%, transparent 31%);
}

h1, h2, h3 { font-weight: 600; line-height: 1.06; margin: 0; letter-spacing: -0.022em; }
code, .mono, .num { font-family: "JetBrains Mono", ui-monospace, monospace; }
a { color: var(--ink); text-underline-offset: 3px; }

/* ── top ─────────────────────────────────────────────────────────────────── */

.top {
  position: sticky; top: 0; z-index: 40;
  background: rgba(0,0,0,0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.top-inner { max-width: var(--shell); margin: 0 auto; padding: 13px 24px; display: flex; align-items: center; gap: 22px; }
.mark { display: flex; align-items: center; gap: 13px; color: var(--ink); text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
.mark svg { height: 22px; width: auto; display: block; }
.mark .rule { width: 1px; height: 20px; background: var(--line-2); }
.tabs { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tabs a {
  color: var(--dim); text-decoration: none; font-size: 13px; padding: 7px 12px; white-space: nowrap;
  border: 1px solid transparent;
}
.tabs a:hover { color: var(--ink); }
.tabs a.on { color: var(--ink); border-color: var(--line-2); }
.wallet { margin-left: auto; display: flex; gap: 12px; align-items: center; }
.wallet .x { display: flex; align-items: center; color: var(--dim); }
.wallet .x:hover { color: var(--ink); }
.wallet .x svg { width: 15px; height: 15px; display: block; }
.foot a { color: var(--dimmer); text-decoration: none; }
.foot a:hover { color: var(--ink); }

.btn {
  font-family: "JetBrains Mono", monospace; font-size: 12px; letter-spacing: 0.04em;
  padding: 9px 16px; border: 1px solid var(--line-2); background: transparent; color: var(--ink);
  cursor: pointer; text-decoration: none; display: inline-block;
}
.btn:hover { border-color: var(--ink); }
.btn.solid { background: var(--ink); color: #000; border-color: var(--ink); font-weight: 600; }
.btn.solid:hover { background: #e2e2e6; }
.btn:disabled { opacity: 0.3; cursor: not-allowed; }
.pill { font-family: "JetBrains Mono", monospace; font-size: 11px; padding: 5px 9px; border: 1px solid var(--line-2); color: var(--dim); }
.pill.bad { color: #fff; border-color: #fff; cursor: pointer; }

/* ── page ────────────────────────────────────────────────────────────────── */

#view { min-height: 62vh; }
.page { max-width: var(--shell); margin: 0 auto; padding: 0 24px 110px; position: relative; z-index: 1; }

.head { padding: 76px 0 40px; }
.eyebrow { font-family: "JetBrains Mono", monospace; font-size: 11px; letter-spacing: 0.24em; text-transform: uppercase; color: var(--dimmer); margin-bottom: 22px; }
.head h1 { font-size: clamp(38px, 6vw, 68px); max-width: 17ch; }
.head h1 em { font-style: normal; color: var(--dim); }
.head .lede { color: var(--dim); font-size: 17.5px; margin: 24px 0 0; max-width: 64ch; }
.lede strong { color: var(--ink); font-weight: 500; }

.banner { padding: 15px 18px; border: 1px solid var(--line-2); font-size: 14.5px; color: var(--dim); margin: 24px 0; }
.banner b { color: var(--ink); font-weight: 600; }

/* ── readouts ────────────────────────────────────────────────────────────── */

.readout { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); border: 1px solid var(--line); }
.readout > div { padding: 16px 18px; border-right: 1px solid var(--line); }
.readout > div:last-child { border-right: 0; }
.readout dt { font-family: "JetBrains Mono", monospace; font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dimmer); margin: 0 0 9px; }
.readout dd { margin: 0; font-family: "JetBrains Mono", monospace; font-size: 20px; }
.readout dd small { font-size: 11px; color: var(--dimmer); }
.ph { color: var(--line-2); }

/* ── figures ─────────────────────────────────────────────────────────────── */

.figure { border: 1px solid var(--line); position: relative; overflow: hidden; }
.figure canvas { display: block; width: 100%; }
.cap { font-family: "JetBrains Mono", monospace; font-size: 10.5px; letter-spacing: 0.1em; color: var(--dimmer); padding: 12px 18px; border-top: 1px solid var(--line); }

section { padding: 72px 0 0; }
h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 16px; }
.sub { color: var(--dim); max-width: 64ch; margin: 0 0 28px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.cols3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cell { background: #000; padding: 26px 24px; text-decoration: none; color: inherit; display: block; }
.cell:hover { background: var(--panel); }
.cell .k { font-family: "JetBrains Mono", monospace; font-size: 10px; letter-spacing: 0.18em; color: var(--dimmer); display: block; margin-bottom: 14px; }
.cell h3 { font-size: 20px; margin-bottom: 10px; }
.cell p { margin: 0; color: var(--dim); font-size: 14.5px; }

/* ── desk ────────────────────────────────────────────────────────────────── */

.desk { display: grid; grid-template-columns: 360px 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.panel { background: #000; padding: 26px; }
.panel label { display: block; font-family: "JetBrains Mono", monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dimmer); margin: 22px 0 9px; }
.panel label:first-of-type { margin-top: 0; }
.panel label b { float: right; color: var(--ink); letter-spacing: 0; text-transform: none; font-weight: 500; }
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 1px; background: var(--line-2); outline: none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 12px; height: 12px; background: #fff; cursor: pointer; }
input[type="range"]::-moz-range-thumb { width: 12px; height: 12px; border-radius: 0; border: 0; background: #fff; cursor: pointer; }
input[type="text"], select {
  width: 100%; background: #000; border: 1px solid var(--line-2); color: var(--ink);
  padding: 11px 12px; font-family: "JetBrains Mono", monospace; font-size: 12.5px;
}
input[type="text"]:focus, select:focus { outline: none; border-color: var(--ink); }

.out { background: #000; padding: 26px; display: flex; flex-direction: column; }
.big { font-family: "JetBrains Mono", monospace; font-size: clamp(30px, 4.4vw, 46px); line-height: 1; }
.big small { font-size: 14px; color: var(--dim); }
.rows { margin-top: auto; border-top: 1px solid var(--line); padding-top: 18px; }
.rows div { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; font-family: "JetBrains Mono", monospace; font-size: 12.5px; }
.rows span { color: var(--dimmer); }
.rows b { font-weight: 400; }

/* ── tables ──────────────────────────────────────────────────────────────── */

table { width: 100%; border-collapse: collapse; font-family: "JetBrains Mono", monospace; font-size: 12.5px; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); }
th { color: var(--dimmer); font-weight: 400; font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; }
tr:hover td { background: var(--panel); }
td a { color: var(--dim); text-decoration: none; }
td a:hover { color: var(--ink); }
.empty { color: var(--dimmer); padding: 30px 16px; font-size: 14px; }

/* ── docs ────────────────────────────────────────────────────────────────── */

.doc { display: grid; grid-template-columns: 220px 1fr; gap: 44px; align-items: start; }
.toc { position: sticky; top: 80px; display: flex; flex-direction: column; }
.toc a { padding: 9px 12px; text-decoration: none; color: var(--dim); font-size: 13.5px; border-left: 1px solid var(--line); }
.toc a.on { color: var(--ink); border-left-color: var(--ink); }
.body { max-width: 68ch; }
.body h2 { margin: 4px 0 20px; }
.body p, .body li { color: var(--dim); }
.body li { margin-bottom: 9px; }
.body strong { color: var(--ink); font-weight: 500; }
.body pre { border: 1px solid var(--line); padding: 16px 18px; overflow-x: auto; font-size: 12.5px; color: var(--ink); font-family: "JetBrains Mono", monospace; }

.onward { display: flex; align-items: baseline; gap: 16px; margin-top: 64px; padding: 22px 24px; border: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.onward:hover { border-color: var(--line-2); background: var(--panel); }
.onward .l { font-size: 19px; font-weight: 600; }
.onward .n { color: var(--dim); font-family: "JetBrains Mono", monospace; font-size: 12px; }
.onward .a { margin-left: auto; }

footer { border-top: 1px solid var(--line); }
.foot { max-width: var(--shell); margin: 0 auto; padding: 26px 24px; display: flex; gap: 22px; flex-wrap: wrap; font-family: "JetBrains Mono", monospace; font-size: 11.5px; color: var(--dimmer); }

@media (max-width: 1000px) {
  .split, .desk, .doc, .cols3 { grid-template-columns: 1fr; }
  .toc { position: static; flex-flow: row wrap; }
}
@media (max-width: 620px) {
  .top-inner { flex-wrap: wrap; padding: 11px 16px; gap: 12px; }
  .tabs { order: 3; width: 100%; margin: 0 -16px; padding: 0 16px; }
  .page { padding: 0 16px 80px; }
  .head { padding: 44px 0 28px; }
}