/* fleethall.com, direction A, Floor: the market is the picture. The arena's Graphite colours; Archivo semi-expanded for
   display only. Every font is served from this origin (OFL, fonts/OFL.txt), so a page view asks no one else for
   anything. */
@font-face { font-family: "Archivo"; font-weight: 600 800; font-stretch: 112% 125%; font-display: swap; src: url(fonts/archivo-display.woff2) format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 400 700; font-display: swap; src: url(fonts/inter.woff2) format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 400 500; font-display: swap; src: url(fonts/jetbrains-mono.woff2) format("woff2"); }

:root {
  /* ink-3 is lighter than the platform's, so 11–13 px captions on black keep a 4.5:1 contrast */
  --bg: #07090b; --panel: #0d1014; --panel-2: #141820; --line: #1c2129; --line-2: #262c36;
  --ink: #eef1f4; --ink-2: #a3acb9; --ink-3: #808a98; --ink-4: #424955;
  --up: #22c38e; --up-a: rgba(34, 195, 142, 0.16); --down: #f2495c; --down-a: rgba(242, 73, 92, 0.16);
  --accent: #5ee3c8;
  --display: "Archivo", "Inter", system-ui, sans-serif; --ui: "Inter", system-ui, sans-serif; --mono: "JetBrains Mono", ui-monospace, monospace;
  --gutter: clamp(16px, 4vw, 56px);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 16px/1.55 var(--ui); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
.n { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.up { color: var(--up); } .down { color: var(--down); }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* nav */
.nav { position: fixed; inset: 0 0 auto; z-index: 20; display: flex; align-items: center; gap: 28px; height: 64px; padding: 0 var(--gutter); background: linear-gradient(var(--bg), rgba(7, 9, 11, 0)); }
.mark { font: 800 15px var(--display); font-stretch: 125%; letter-spacing: 0.22em; text-decoration: none; }
.nav nav { display: flex; gap: 24px; font-size: 13px; color: var(--ink-2); }
.nav nav a { text-decoration: none; }
.nav nav a:hover { color: var(--ink); }
.nav .cta { margin-left: auto; }
.btn { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 20px; border-radius: 999px; font: 600 14px var(--ui); text-decoration: none; border: 1px solid var(--line-2); color: var(--ink); background: transparent; cursor: pointer; }
.btn.primary { background: var(--accent); color: #04120e; border-color: var(--accent); }
.btn.small { height: 36px; padding: 0 16px; font-size: 13px; }

/* hero: the BTC book as a depth landscape, replayed as recorded */
.hero { position: relative; height: 100svh; min-height: 640px; overflow: hidden; }
#depth { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.price { position: absolute; z-index: 2; left: 28%; right: 0; top: 13vh; text-align: center; pointer-events: none; }
.price small { display: block; font: 500 12px var(--mono); letter-spacing: 0.14em; color: var(--ink-3); margin-bottom: 6px; }
.price b { font: 500 clamp(44px, 8.4vw, 132px) / 1 var(--mono); letter-spacing: -0.04em; font-variant-numeric: tabular-nums; transition: color 0.4s; }
.price i { font-style: normal; font-size: 0.42em; vertical-align: 0.5em; margin-left: 0.15em; }
/* A hollow dot: what plays is a recording, not a live feed */
.status { position: absolute; z-index: 2; top: 76px; right: var(--gutter); margin: 0; display: flex; align-items: center; gap: 8px; font: 500 11px var(--mono); color: var(--ink-2); letter-spacing: 0.04em; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; border: 1.5px solid var(--ink-2); }
.scrim { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7, 9, 11, 0.9) 0%, rgba(7, 9, 11, 0.6) 30%, rgba(7, 9, 11, 0) 50%), linear-gradient(to top, var(--bg) 0%, rgba(7, 9, 11, 0) 22%); pointer-events: none; }
.copy { position: absolute; left: var(--gutter); right: var(--gutter); bottom: max(48px, 7vh); display: grid; gap: 22px; max-width: 760px; }
h1 { margin: 0; font: 700 clamp(38px, 5.4vw, 86px) / 0.95 var(--display); font-stretch: 112%; letter-spacing: -0.03em; text-transform: uppercase; }
.lede { margin: 0; max-width: 54ch; font-size: clamp(16px, 1.35vw, 19px); color: var(--ink-2); }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.caption { position: absolute; right: var(--gutter); bottom: max(48px, 7vh); max-width: 300px; margin: 0; font: 400 11px/1.5 var(--mono); color: var(--ink-3); text-align: right; }

/* sections: one idea per screen */
section.screen { min-height: 100svh; padding: 120px var(--gutter); display: grid; align-content: center; gap: 40px; border-top: 1px solid var(--line); }
.stack { display: grid; gap: 28px; }
.kicker { font: 500 12px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); }
h2 { margin: 0; font: 700 clamp(34px, 5vw, 76px) / 1 var(--display); font-stretch: 112%; letter-spacing: -0.03em; text-transform: uppercase; max-width: 16ch; }
.body { max-width: 58ch; color: var(--ink-2); font-size: clamp(16px, 1.3vw, 19px); margin: 0; }
.fine { font: 400 12px/1.5 var(--mono); color: var(--ink-3); max-width: 80ch; margin: 0; }
[data-in] { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-in].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { [data-in] { opacity: 1; transform: none; transition: none; } }

/* markets */
.big { font: 800 clamp(120px, 24vw, 360px) / 0.82 var(--display); font-stretch: 125%; letter-spacing: -0.05em; }
.big-line { margin: 0; font: 600 clamp(22px, 2.6vw, 38px) / 1.15 var(--display); font-stretch: 112%; text-transform: uppercase; letter-spacing: -0.01em; }
.classes { display: flex; flex-wrap: wrap; gap: 10px 34px; font-size: clamp(15px, 1.4vw, 20px); color: var(--ink-2); }
.classes b { color: var(--ink); font: 500 1em var(--mono); margin-left: 8px; }
.wall { margin: 0 calc(-1 * var(--gutter)); display: grid; gap: 1px; overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.lane { display: flex; gap: 1px; width: max-content; animation: drift 90s linear infinite; }
.lane:nth-child(2) { animation-direction: reverse; animation-duration: 110s; }
@keyframes drift { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .lane { animation: none; } }
.tile { display: grid; gap: 2px; min-width: 150px; padding: 14px 18px; background: var(--panel); }
.tile b { font: 600 14px var(--ui); }
.tile span { font: 400 13px var(--mono); color: var(--ink-2); }
.tile em { font: 500 12px var(--mono); font-style: normal; }

/* fills: a market order walking the recorded book */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 96px); align-items: center; }
.rules { list-style: none; margin: 0; padding: 0; display: grid; border-top: 1px solid var(--line); max-width: 560px; }
.rules li { display: grid; grid-template-columns: 170px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; color: var(--ink-2); }
.rules li b { color: var(--ink); font-weight: 500; }
.sim { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.sim-head { display: flex; align-items: center; gap: 16px; padding: 16px 18px; border-bottom: 1px solid var(--line); }
.sim-head label { font-size: 13px; color: var(--ink-2); white-space: nowrap; }
.sim-head output { margin-left: auto; font: 500 22px var(--mono); }
.sim-range { padding: 6px 18px 0; }
.sim input[type=range] { width: 100%; accent-color: var(--accent); height: 28px; }
.ladder { font: 400 13px var(--mono); }
.ladder .row { position: relative; display: grid; grid-template-columns: 1fr 1fr 1fr; padding: 0 18px; height: 26px; align-items: center; }
.ladder .row span { position: relative; }
.ladder .row span:not(:first-child) { text-align: right; }
.ladder .row::before { content: ""; position: absolute; inset: 1px 0 1px auto; width: var(--w, 0%); background: var(--down-a); }
.ladder .row.head { color: var(--ink-3); font-size: 11px; }
.ladder .row.head::before { content: none; }
.ladder .row.taken { background: rgba(94, 227, 200, 0.07); }
.ladder .row.taken span:first-child { color: var(--accent); }
.ladder .mid { display: flex; justify-content: space-between; padding: 8px 18px; border-block: 1px solid var(--line); color: var(--ink-3); font-size: 12px; }
.result { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
.result div { padding: 14px 18px; display: grid; gap: 2px; border-right: 1px solid var(--line); }
.result div:last-child { border-right: 0; }
.result small { color: var(--ink-3); font-size: 11px; }
.result b { font: 500 16px var(--mono); }
.sim-note { padding: 12px 18px 14px; }

/* API */
.term { background: #050607; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; max-width: 980px; width: 100%; }
.term-head { display: flex; align-items: center; gap: 4px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.term-head .tab { background: none; border: 0; color: var(--ink-3); font: 500 13px var(--ui); padding: 8px 12px; border-radius: 8px; cursor: pointer; }
.term-head .tab[aria-pressed="true"] { color: var(--ink); background: var(--panel-2); }
.term-head .run { margin-left: auto; }
.term pre { margin: 0; padding: 20px; font: 400 13px/1.6 var(--mono); color: var(--ink-2); overflow-x: auto; white-space: pre; min-height: 120px; }
.term pre .k { color: var(--accent); } .term pre .s { color: #d9c08a; } .term pre .c { color: var(--ink-3); }
.term .out { border-top: 1px solid var(--line); }
.term .out-head { display: flex; flex-wrap: wrap; gap: 4px 16px; padding: 10px 20px 0; font: 500 12px var(--mono); color: var(--ink-3); }
.term .out-head b { color: var(--up); font-weight: 500; }
.term .out pre { min-height: 0; max-height: 380px; color: var(--ink); }

/* sign up */
.join { display: grid; gap: 28px; max-width: 640px; }
footer { border-top: 1px solid var(--line); padding: 40px var(--gutter) 56px; display: grid; gap: 18px; color: var(--ink-3); font-size: 13px; }
footer .row { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; }
footer .recorded { font: 400 12px var(--mono); }

@media (max-width: 860px) {
  .nav nav { display: none; }
  .scrim { background: linear-gradient(to top, var(--bg) 30%, rgba(7, 9, 11, 0.75) 55%, rgba(7, 9, 11, 0) 75%); }
  .price { top: 96px; left: 0; }
  .status { top: 64px; left: var(--gutter); right: auto; }
  .caption { display: none; }
  .split { grid-template-columns: 1fr; }
  .result { grid-template-columns: repeat(2, 1fr); }
  .result div:nth-child(2) { border-right: 0; }
  .result div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .rules li { grid-template-columns: 1fr; gap: 2px; }
  section.screen { padding: 88px var(--gutter); min-height: auto; }
}