:root {
  --bg: #f7f5f0; --bg2: #ffffff; --ink: #1b1a17; --ink2: #5b5850; --line: #e3dfd6;
  --accent: #0b6e4f; --accent2: #d97706; --accent3: #2563eb; --warn: #b91c1c;
  --ok: #0b6e4f; --chip: #eef3f0; --mono: "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; --radius: 14px;
  --shadow: 0 1px 2px rgba(0,0,0,.05), 0 8px 24px rgba(0,0,0,.06);
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #121311; --bg2: #1b1d1a; --ink: #ecebe6; --ink2: #a8a79f; --line: #2b2e2a;
  --accent: #34c38f; --accent2: #f5a524; --accent3: #60a5fa; --warn: #f87171; --ok: #34c38f; --chip: #222622;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
} }
:root[data-theme="dark"] {
  --bg: #121311; --bg2: #1b1d1a; --ink: #ecebe6; --ink2: #a8a79f; --line: #2b2e2a;
  --accent: #34c38f; --accent2: #f5a524; --accent3: #60a5fa; --warn: #f87171; --ok: #34c38f; --chip: #222622;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { max-width: 100%; overflow-x: hidden; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); line-height: 1.55; font-size: 17px; }
img, svg, table, pre { max-width: 100%; }
.card { overflow-x: auto; }
a { color: var(--accent3); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5rem; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1rem; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
header.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 12px; min-height: 56px; }
.brand { font-weight: 700; text-decoration: none; color: var(--ink); }
nav.main { margin-left: auto; display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
nav.main a { color: var(--ink2); text-decoration: none; padding: 6px 10px; border-radius: 999px; font-size: .92rem; white-space: nowrap; }
nav.main a:hover, nav.main a.on { background: var(--chip); color: var(--ink); }
.theme { border: 1px solid var(--line); background: var(--bg2); color: var(--ink); border-radius: 999px; padding: 4px 10px; cursor: pointer; font: inherit; font-size: .85rem; }
section { padding: 64px 0; border-bottom: 1px solid var(--line); }
section .kicker { color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; margin-bottom: .4rem; }
.lead { font-size: 1.15rem; color: var(--ink2); max-width: 62ch; }
.hero { padding: 84px 0 56px; }
.hero .grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; align-items: center; }
.hero .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip { background: var(--chip); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; font-size: .85rem; color: var(--ink); }
.chip.accent { background: color-mix(in srgb, var(--accent) 15%, transparent); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.card { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card h3 { margin-bottom: .35rem; }
.card p { color: var(--ink2); font-size: .97rem; margin-bottom: .5rem; }
.card .num { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; color: var(--ink); }
.card .num small { font-size: .9rem; font-weight: 500; color: var(--ink2); margin-left: 4px; }
.badge { display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; padding: 2px 8px; border-radius: 6px; margin-left: 8px; vertical-align: middle; }
.badge.illu { background: color-mix(in srgb, var(--accent2) 18%, transparent); color: var(--accent2); }
.badge.meas { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.badge.own { background: color-mix(in srgb, var(--accent3) 18%, transparent); color: var(--accent3); }
.note { font-size: .88rem; color: var(--ink2); }
.timeline { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.timeline li { display: grid; grid-template-columns: 120px 1fr; gap: 16px; align-items: start; }
.timeline .when { font-family: var(--mono); font-size: .85rem; color: var(--accent); padding-top: 4px; }
.timeline .what { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.timeline .what strong { display: block; }
.timeline .what span { color: var(--ink2); font-size: .95rem; }
.demo { margin-top: 24px; display: grid; grid-template-columns: 300px 1fr; gap: 20px; }
.demo .controls { display: grid; gap: 14px; align-content: start; }
.demo label { display: grid; gap: 4px; font-size: .9rem; color: var(--ink2); }
.demo label b { color: var(--ink); display: flex; justify-content: space-between; font-weight: 600; }
.demo input[type=range] { width: 100%; accent-color: var(--accent); }
.demo .viz { min-height: 280px; }
.demo .viz svg { width: 100%; height: auto; display: block; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-top: 14px; }
.kpi { background: var(--chip); border-radius: 10px; padding: 10px 12px; }
.kpi .v { font-size: 1.4rem; font-weight: 800; }
.kpi .l { font-size: .78rem; color: var(--ink2); }
.kpi.bad .v { color: var(--warn); } .kpi.good .v { color: var(--ok); }
.toggle { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.toggle button { border: 0; background: var(--bg2); color: var(--ink2); padding: 6px 12px; cursor: pointer; font: inherit; font-size: .88rem; }
.toggle button.on { background: var(--accent); color: #fff; }
.pipeline { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-top: 22px; align-items: stretch; }
.pipeline .step { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 12px; font-size: .9rem; position: relative; opacity: .55; transition: opacity .4s, transform .4s; }
.pipeline .step.on { opacity: 1; transform: translateY(-3px); border-color: var(--accent); }
.pipeline .step b { display: block; margin-bottom: 4px; }
.pipeline .step .st { font-family: var(--mono); font-size: .75rem; color: var(--accent); }
.report { margin-top: 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
table.rep { width: 100%; border-collapse: collapse; font-size: .85rem; font-family: var(--mono); }
table.rep th, table.rep td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); }
table.rep th { color: var(--ink2); font-weight: 600; }
.mail { font-family: var(--mono); font-size: .82rem; white-space: pre-wrap; background: var(--chip); border-radius: 10px; padding: 12px; }
pre.code { font-family: var(--mono); font-size: .8rem; background: #14211c; color: #d7f0e3; border-radius: 10px; padding: 14px; overflow-x: auto; margin: 12px 0 0; }
.bot { margin-top: 20px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.chat { background: var(--bg2); border: 1px solid var(--line); border-radius: var(--radius); display: flex; flex-direction: column; min-height: 420px; }
.chat .log { flex: 1; padding: 16px; overflow-y: auto; display: grid; gap: 10px; align-content: start; max-height: 460px; }
.msg { max-width: 92%; padding: 10px 12px; border-radius: 12px; font-size: .95rem; }
.msg.me { background: var(--accent); color: #fff; justify-self: end; }
.msg.bot { background: var(--chip); }
.msg.bot .src { display: block; margin-top: 8px; font-size: .8rem; color: var(--ink2); border-left: 3px solid var(--accent); padding-left: 8px; }
.msg.bot ol { margin: 6px 0 0 18px; padding: 0; }
.chat form { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--line); }
.chat input { flex: 1; font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
.chat button, .btn { font: inherit; padding: 10px 14px; border-radius: 10px; border: 0; background: var(--accent); color: #fff; cursor: pointer; }
.btn.ghost { background: var(--chip); color: var(--ink); border: 1px solid var(--line); }
.quick { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.quick button { font: inherit; font-size: .82rem; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--bg2); color: var(--ink); cursor: pointer; }
.score { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; margin-top: 16px; }
.score .row { background: var(--bg2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.score .row b { font-family: var(--mono); font-size: 1.1rem; color: var(--ok); }
.score .row span { display: block; font-size: .82rem; color: var(--ink2); }
.bar { height: 6px; background: var(--chip); border-radius: 999px; overflow: hidden; margin-top: 6px; }
.bar i { display: block; height: 100%; background: var(--ok); }
.tools { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; margin-top: 16px; }
.tools .card ul { margin: 0; padding-left: 18px; color: var(--ink2); font-size: .95rem; }
.story { max-width: 70ch; }
.story p { font-size: 1.05rem; }
.story .pull { border-left: 4px solid var(--accent); padding: 6px 16px; margin: 20px 0; font-size: 1.2rem; font-style: italic; color: var(--ink); }
footer { padding: 40px 0 60px; color: var(--ink2); font-size: .9rem; }
footer a { color: var(--ink); }
.screen { background: #000; border-radius: 10px; padding: 0; overflow: hidden; }
.legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: .82rem; color: var(--ink2); margin-top: 8px; }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 5px; }
@media (max-width: 820px) {
  .hero .grid, .demo, .report, .bot { grid-template-columns: 1fr; }
  .pipeline { grid-template-columns: 1fr 1fr; }
  .timeline li { grid-template-columns: 1fr; gap: 4px; }
  section { padding: 44px 0; }
  body { font-size: 16px; }
}