/* Weft. Near-black ground, hairline borders, one colour: the cyan of a current. */
@font-face { font-family: "Geist"; src: url("fonts/geist-latin.woff2") format("woff2"); font-weight: 100 900; font-display: swap; unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Geist"; src: url("fonts/geist-vietnamese.woff2") format("woff2"); font-weight: 100 900; font-display: swap; unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }
@font-face { font-family: "Geist Mono"; src: url("fonts/geist-mono-latin.woff2") format("woff2"); font-weight: 100 900; font-display: swap; unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Geist Mono"; src: url("fonts/geist-mono-vietnamese.woff2") format("woff2"); font-weight: 100 900; font-display: swap; unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }

:root {
  --sans: "Geist", system-ui, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, Consolas, monospace;
  --bg: #07090c;
  --bg2: #0c1014;
  --line: #1a2128;
  --line-h: #2f3b45;
  --tp: #f4f7f8;
  --ts: #c3cbd1;
  --tt: #7d8891;
  --ac: #22d3ee;
  --ac-soft: #a5f1fb;
  --ac-dim: #22d3ee14;
  --s1: #22d3ee;
  --s2: #a78bfa;
  --s3: #fbbf24;
  --good: #5eead4;
  --bad: #fda4af;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --w: 1120px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ts); font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
/* A faint warp of vertical threads behind everything. */
body::before { content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: repeating-linear-gradient(90deg, transparent 0 79px, #ffffff06 79px 80px), radial-gradient(900px 480px at 78% -10%, #22d3ee12, transparent 70%); }
a { color: inherit; }
::selection { background: #0e7490; color: #fff; }
:focus-visible { outline: 2px solid var(--ac); outline-offset: 3px; border-radius: 2px; }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--tp); color: #000; padding: 8px 12px; z-index: 20; }
.skip:focus { left: 8px; }

.top { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 28px; padding: 14px max(20px, calc((100vw - var(--w)) / 2)); background: #07090ce6; backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--tp); text-decoration: none; font: 600 17px var(--mono); letter-spacing: -0.02em; }
.brand svg { color: var(--ac); }
.top nav { display: flex; gap: 22px; margin-left: auto; font: 13px var(--mono); }
.top nav a { color: var(--tt); text-decoration: none; transition: color 0.2s; }
.top nav a:hover { color: var(--tp); }
.lang { display: flex; border: 1px solid var(--line); }
.lang button { font: 500 12px var(--mono); color: var(--tt); background: none; border: 0; padding: 6px 10px; cursor: pointer; }
.lang button[aria-pressed="true"] { background: var(--tp); color: #000; }

main { max-width: var(--w); margin: 0 auto; padding: 0 20px; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr); gap: 56px; align-items: center; padding: 84px 0 72px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 22px; font: 12px var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--tt); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ac); box-shadow: 0 0 0 4px var(--ac-dim); }
h1 { margin: 0 0 22px; font: 600 clamp(38px, 5.4vw, 64px)/1.02 var(--sans); letter-spacing: -0.035em; color: var(--tp); text-wrap: balance; }
h1 span, h1 em { display: block; }
h1 em { font-style: normal; color: var(--ac); }
.lede { margin: 0 0 30px; max-width: 54ch; font-size: 17.5px; color: var(--ts); text-wrap: pretty; }
.lede.small { font-size: 16px; color: var(--tt); margin-bottom: 26px; max-width: 62ch; }

.cmd { display: flex; align-items: center; gap: 12px; padding: 4px 4px 4px 14px; background: var(--bg2); border: 1px solid var(--line); min-width: 0; }
.cmd:hover { border-color: var(--line-h); }
.ps { font: 13px var(--mono); color: var(--ac); flex: none; }
.cmd code { flex: 1; min-width: 0; font: 13px/1.5 var(--mono); color: var(--tp); white-space: nowrap; overflow-x: auto; scrollbar-width: none; padding: 9px 0; }
.cmd code::-webkit-scrollbar { display: none; }
.cmd button { flex: none; font: 500 12px var(--mono); color: var(--tp); background: #ffffff0f; border: 1px solid var(--line-h); padding: 8px 12px; cursor: pointer; transition: background 0.2s, color 0.2s; }
.cmd button:hover { background: var(--tp); color: #000; }
.cmd button.ok { background: var(--ac); color: #012; border-color: var(--ac); }
.cta { display: flex; align-items: center; flex-wrap: wrap; gap: 14px 18px; margin-top: 14px; }
.btn { display: inline-flex; align-items: center; gap: 10px; font: 600 14px var(--mono); padding: 12px 18px; text-decoration: none; border: 1px solid var(--line-h); color: var(--tp); transition: transform 0.2s var(--ease), background 0.2s; }
.btn.primary { background: var(--ac); border-color: var(--ac); color: #021116; }
.btn.primary:hover { background: var(--ac-soft); transform: translateY(-1px); }
.meta { font: 12px var(--mono); color: var(--tt); }
.fine { margin: 14px 0 0; font-size: 13px; color: var(--tt); max-width: 62ch; }
.fine code { font: 12px var(--mono); color: var(--ts); overflow-wrap: anywhere; }

.stage { margin: 0; padding: 20px; background: linear-gradient(180deg, #0c1014, #090c10); border: 1px solid var(--line); min-width: 0; }
.stage-top { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); align-items: center; gap: 14px; }
.stage canvas { display: block; width: 100%; }
#threads { height: 190px; }
#chart { height: 150px; border: 1px solid var(--line); }
.read { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.lbl { font: 11px var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--tt); }
.big { font: 600 clamp(34px, 4.2vw, 50px)/1 var(--mono); color: var(--tp); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.big b { font-weight: 600; }
.big small { font: 500 13px var(--mono); color: var(--tt); margin-left: 8px; letter-spacing: 0; }
.sub { font: 12px var(--mono); color: var(--tt); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-variant-numeric: tabular-nums; }
.sub.limit { color: var(--ac); }
.stage-head { margin: 18px 0 8px; }
.stage figcaption { margin-top: 12px; font-size: 12.5px; color: var(--tt); }

.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line); border-right: 0; }
.facts div { padding: 22px 20px; border-right: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; }
.facts b { font: 600 26px/1.1 var(--mono); color: var(--tp); letter-spacing: -0.02em; }
.facts span { font-size: 13px; color: var(--tt); line-height: 1.45; }

.block { padding: 104px 0 0; }
.kicker { margin: 0 0 14px; font: 12px var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ac); }
h2 { margin: 0 0 18px; font: 600 clamp(28px, 3.4vw, 40px)/1.1 var(--sans); letter-spacing: -0.03em; color: var(--tp); text-wrap: balance; max-width: 22ch; }
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); margin-top: 34px; }
.cards article { padding: 28px 26px 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background 0.3s; }
.cards article:hover { background: var(--bg2); }
.cards .n { font: 600 12px var(--mono); color: var(--ac); }
.cards h3 { margin: 14px 0 8px; font: 600 19px/1.25 var(--sans); color: var(--tp); letter-spacing: -0.01em; }
.cards p { margin: 0; font-size: 15px; color: var(--tt); text-wrap: pretty; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; min-width: 560px; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th { font: 500 11px var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--tt); background: var(--bg2); }
td { font: 14px var(--mono); color: var(--ts); font-variant-numeric: tabular-nums; white-space: nowrap; }
td:first-child { font: 15px var(--sans); color: var(--tp); white-space: normal; }
td:first-child small { display: block; font-size: 12.5px; color: var(--tt); }
td.win { color: var(--good); }
td.loss { color: var(--bad); }
td.even { color: var(--tt); }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: start; }
.checks { list-style: none; margin: 34px 0 0; padding: 0; border-top: 1px solid var(--line); }
.checks li { position: relative; padding: 16px 0 16px 30px; border-bottom: 1px solid var(--line); font-size: 15px; color: var(--ts); }
.checks li::before { content: ""; position: absolute; left: 2px; top: 23px; width: 12px; height: 6px; border-left: 2px solid var(--ac); border-bottom: 2px solid var(--ac); transform: rotate(-45deg); }

.faq { border-top: 1px solid var(--line); margin-top: 30px; }
details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; padding: 18px 34px 18px 0; position: relative; font: 500 17px var(--sans); color: var(--tp); }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font: 400 22px var(--mono); color: var(--tt); transition: transform 0.25s var(--ease); }
details[open] summary::after { transform: rotate(45deg); color: var(--ac); }
details p { margin: 0 0 20px; max-width: 68ch; color: var(--tt); font-size: 15.5px; }

.closer { margin: 110px 0 0; padding: 56px 28px; text-align: center; border: 1px solid var(--line); background: radial-gradient(600px 220px at 50% 0, #22d3ee14, transparent 70%), var(--bg2); }
.closer h2 { max-width: none; margin-bottom: 26px; }
.closer .fine { margin: 20px auto 0; }
.foot { max-width: var(--w); margin: 0 auto; padding: 34px 20px 46px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; font: 12px var(--mono); color: var(--tt); }
.foot a { color: var(--ts); }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 920px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 40px; padding: 56px 0 56px; }
  .split { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .facts div:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .top nav { display: none; }
  .lang { margin-left: auto; }
  .block { padding-top: 76px; }
}
@media (max-width: 560px) {
  .cards { grid-template-columns: minmax(0, 1fr); }
  .stage { padding: 14px; }
  .stage-top { grid-template-columns: minmax(0, 1fr); }
  #threads { height: 170px; }
  .cmd button { padding: 8px 10px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .cmd button { transition: none; }
}