:root {
  --bg: #16171a;
  --bg-2: #1b1d21;
  --panel: #1e2024;
  --panel-2: #24272c;
  --line: #2b2e34;
  --line-2: #3a3e46;
  --text: #e6e8eb;
  --muted: #9096a0;
  --dim: #666c76;
  --accent: #ef5b5b;
  --accent-2: #c94646;
  --accent-hover: #f47a7a;
  --accent-ink: #2a0b0b;
  --accent-dim: rgba(239, 91, 91, .13);
  --grey: #a2a9b3;
  --r: 3px;
  --sans: "Inter", "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", "JetBrains Mono", Consolas, monospace;
  --wrap: 1080px;
}

* { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--r); }

.wrap { width: min(var(--wrap), 100% - 48px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; border-radius: var(--r); z-index: 10; }
.skip:focus { left: 8px; }

/* header */
.top { position: sticky; top: 0; z-index: 5; background: rgba(22, 23, 26, .92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -.01em; text-decoration: none; }
.logo { height: 25px; width: auto; }
.nav { display: flex; align-items: center; gap: 22px; font-size: 14px; color: var(--muted); }
.nav a { text-decoration: none; }
.nav a:hover { color: var(--text); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 42px; padding: 0 18px; border-radius: var(--r); border: 1px solid var(--line-2); background: transparent; color: var(--text); font: 500 15px/1 var(--sans); text-decoration: none; cursor: pointer; transition: background .15s, border-color .15s, transform .15s; }
.btn:hover { border-color: var(--muted); background: var(--panel); }
.btn:active { transform: scale(.98); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.small { height: 34px; padding: 0 14px; font-size: 14px; }

/* hero */
.hero { padding: 88px 0 72px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 56px; align-items: center; }
.eyebrow { font: 500 12px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin: 0 0 20px; }
h1, h2, h3 { margin: 0; letter-spacing: -.025em; line-height: 1.1; font-weight: 600; text-wrap: balance; }
h1 { font-size: clamp(38px, 5.4vw, 60px); }
h2 { font-size: clamp(28px, 3.4vw, 38px); }
h3 { font-size: 17px; letter-spacing: -.01em; line-height: 1.3; }
.lede { font-size: 19px; line-height: 1.55; color: var(--muted); margin: 22px 0 0; max-width: 34em; text-wrap: pretty; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.note { margin: 14px 0 0; font-size: 13px; color: var(--dim); }

/* matrix illustration */
.board { border: 1px solid var(--line-2); border-radius: var(--r); background: var(--panel); overflow: hidden; }
.board-bar { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-bottom: 1px solid var(--line); font: 12px/1 var(--mono); color: var(--dim); }
.board-bar b { color: var(--muted); font-weight: 500; }
.axes { display: grid; grid-template-columns: 22px 1fr 1fr; }
.axes .corner { grid-column: 1; }
.col-h { padding: 8px 12px; font: 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--dim); border-bottom: 1px solid var(--line); }
.row-h { writing-mode: vertical-rl; transform: rotate(180deg); text-align: center; font: 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--dim); border-right: 1px solid var(--line); padding: 10px 0; }
.quad { padding: 14px; min-height: 148px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.quad:nth-of-type(even) { border-right: 0; }
.quad.last { border-bottom: 0; }
.q-title { display: flex; align-items: center; gap: 8px; font: 600 12px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 12px; }
.q-title i { width: 8px; height: 8px; border-radius: 1px; background: var(--c); }
.q-do { --c: var(--accent); }
.q-plan { --c: var(--accent-2); }
.q-delegate { --c: var(--grey); }
.q-drop { --c: #5d636d; }
.q-title { color: var(--c); }
.q-drop .q-title { color: var(--dim); }
.item { display: flex; justify-content: space-between; gap: 10px; padding: 8px 10px; margin-top: 6px; background: var(--bg-2); border: 1px solid var(--line); border-left: 2px solid var(--c); border-radius: var(--r); font-size: 13px; line-height: 1.3; }
.item span:last-child { font: 11px/1.6 var(--mono); color: var(--dim); white-space: nowrap; }

/* sections */
section { padding: 84px 0; border-top: 1px solid var(--line); }
.head { max-width: 40em; margin-bottom: 44px; }
.head p { color: var(--muted); font-size: 18px; margin: 16px 0 0; text-wrap: pretty; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--r); }
.step { padding: 28px; border-right: 1px solid var(--line); }
.step:last-child { border-right: 0; }
.num { font: 500 12px/1 var(--mono); color: var(--accent); letter-spacing: .08em; }
.step h3 { margin: 14px 0 10px; }
.step p, .feat p { margin: 0; color: var(--muted); font-size: 15px; text-wrap: pretty; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.feat { padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feat h3 { margin-bottom: 10px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: start; }
.split p { color: var(--muted); font-size: 17px; margin: 16px 0 0; text-wrap: pretty; }
.chat { border: 1px solid var(--line-2); border-radius: var(--r); background: var(--panel); padding: 20px; font-size: 14px; }
.msg { padding: 10px 12px; border-radius: var(--r); background: var(--bg-2); border: 1px solid var(--line); }
.msg + .msg { margin-top: 10px; }
.msg.me { margin-left: 18%; background: var(--accent-dim); border-color: transparent; }
.msg small { display: block; font: 11px/1.4 var(--mono); color: var(--dim); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .06em; }
.list { list-style: none; margin: 22px 0 0; padding: 0; }
.list li { position: relative; padding: 10px 0 10px 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; }
.list li::before { content: ""; position: absolute; left: 0; top: 19px; width: 8px; height: 2px; background: var(--accent); }
.list li b { color: var(--text); font-weight: 500; }

details { border-top: 1px solid var(--line); padding: 18px 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 500; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font: 400 20px/1 var(--mono); color: var(--dim); }
details[open] summary::after { content: "\2013"; }
details p { margin: 12px 0 0; color: var(--muted); max-width: 44em; }
.faq { max-width: 760px; }

.final { text-align: left; }
.final h2 { max-width: 16em; }

footer { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--dim); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: space-between; align-items: flex-start; }
footer .wrap > span { max-width: 46em; line-height: 1.5; }
footer nav { display: flex; gap: 22px; flex-wrap: wrap; }
footer a { text-decoration: none; }
footer a:hover { color: var(--text); }

/* legal pages */
.doc { padding: 64px 0 96px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(32px, 4.4vw, 44px); }
.doc .updated { color: var(--dim); font: 13px/1 var(--mono); margin: 18px 0 0; }
.doc .summary { margin: 28px 0 8px; padding: 18px 20px; border: 1px solid var(--line-2); border-left: 2px solid var(--accent); border-radius: var(--r); background: var(--panel); color: var(--muted); font-size: 16px; }
.doc h2 { font-size: 22px; margin: 44px 0 12px; letter-spacing: -.015em; }
.doc p, .doc li { color: var(--muted); font-size: 16px; text-wrap: pretty; }
.doc li { margin: 6px 0; }
.doc a { color: var(--text); text-decoration-color: var(--accent); text-underline-offset: 3px; }
.doc table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 15px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border: 1px solid var(--line); color: var(--muted); }
.doc th { color: var(--text); font-weight: 500; background: var(--panel); }

@media (max-width: 900px) {
  .hero { padding: 56px 0 48px; }
  .hero .wrap, .split { grid-template-columns: 1fr; gap: 40px; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--line); }
  .step:last-child { border-bottom: 0; }
  .grid { grid-template-columns: 1fr 1fr; }
  section { padding: 60px 0; }
}
@media (max-width: 560px) {
  .wrap { width: calc(100% - 32px); }
  .nav .hide-s { display: none; }
  .grid { grid-template-columns: 1fr; }
  .lede { font-size: 17px; }
  .quad { padding: 10px; min-height: 0; }
  .item { font-size: 12px; padding: 7px 8px; }
  .item span:last-child { display: none; }
  .doc table, .doc thead, .doc tbody, .doc tr, .doc th, .doc td { display: block; }
  .doc thead { display: none; }
  .doc td { border-bottom: 0; }
  .doc tr { border-bottom: 1px solid var(--line); }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }