:root {
  --bg: #f7f8fb;
  --bg-alt: #eef1f7;
  --surface: #ffffff;
  --text: #0e1626;
  --muted: #55607a;
  --line: #dde2ec;
  --accent: #2f6bff;
  --accent-2: #00b3a4;
  --accent-ink: #ffffff;
  --flow-bg: #0b1220;
  --radius: 14px;
  --wrap: 1160px;
  --shadow: 0 1px 2px rgba(14, 22, 38, .04), 0 8px 24px rgba(14, 22, 38, .06);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-alt: #0f1829;
    --surface: #121d31;
    --text: #e8edf7;
    --muted: #96a3bd;
    --line: #22304a;
    --accent: #5b8cff;
    --accent-2: #2dd4bf;
    --accent-ink: #0b1220;
    --flow-bg: #070d18;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.6 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.3rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0 0 1em; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: "JetBrains Mono", ui-monospace, monospace; font-size: .85em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

.eyebrow {
  font: 500 .8rem/1 "JetBrains Mono", ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .8em 1.4em;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--muted); }
.btn--small { padding: .5em 1.1em; font-size: .92rem; }
.btn--large { padding: 1em 2em; font-size: 1.15rem; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--text); font-weight: 600; font-size: 1.15rem; }
.brand:hover { text-decoration: none; }
.brand b { color: var(--accent); font-weight: 700; }
.brand__mark { width: 30px; height: 30px; color: var(--accent); --mark-fg: var(--accent-ink); }
.nav__links { display: flex; align-items: center; gap: 1.8rem; }
.nav__links a:not(.btn) { color: var(--muted); font-weight: 500; font-size: .95rem; }
.nav__links a:not(.btn):hover { color: var(--text); text-decoration: none; }
.nav__toggle { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: transform .2s ease; }

@media (max-width: 820px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
    display: none;
  }
  .nav__links.open { display: flex; }
  .nav__links a:not(.btn) { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav__links .btn { margin-top: 12px; }
  .nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
}

/* Hero */
.hero { padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 8vw, 104px); }
.hero__grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 34em; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 2rem; }
@media (max-width: 960px) { .hero__grid { grid-template-columns: 1fr; } }

.flow {
  position: relative; margin: 0;
  aspect-ratio: 5 / 4;
  border-radius: 20px;
  overflow: hidden;
  background: var(--flow-bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.flow canvas { display: block; width: 100%; height: 100%; }
.flow__panel {
  position: absolute; left: 14px; right: 14px; bottom: 14px;
  padding: 14px 16px;
  background: rgba(11, 18, 32, .72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 12px;
  color: #e8edf7;
  font-size: .9rem;
}
.flow__row { display: flex; justify-content: space-between; align-items: baseline; }
.flow__row label { color: #96a3bd; }
.flow__row output, .flow__stats strong { font-family: "JetBrains Mono", ui-monospace, monospace; }
.flow input[type="range"] { width: 100%; margin: 8px 0 10px; accent-color: #5b8cff; }
.flow__stats { display: flex; gap: 24px; }
.flow__stats div { display: flex; gap: 8px; align-items: baseline; }
.flow__stats span { color: #96a3bd; }
.flow__note { margin: 8px 0 0; font-size: .75rem; color: #6f7c96; }
@media (max-width: 480px) { .flow { aspect-ratio: 4 / 5; } }

/* Sections */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section--alt { background: var(--bg-alt); }
.section__head { max-width: 680px; margin-bottom: 48px; }
.section__head p:not(.eyebrow) { color: var(--muted); font-size: 1.08rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: transform .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.card p { color: var(--muted); font-size: .97rem; }
.card__icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  margin-bottom: 20px;
}
.card__icon svg { width: 24px; height: 24px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.tags { list-style: none; padding: 0; margin: auto 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.tags li {
  font: 500 .75rem/1 "JetBrains Mono", ui-monospace, monospace;
  padding: 6px 9px; border-radius: 6px;
  background: var(--bg-alt); color: var(--muted);
}

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
.step { padding: 0 28px 0 0; position: relative; }
.step::before { content: ""; display: block; height: 2px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); margin-bottom: 24px; opacity: .5; }
.step__num { font: 500 .85rem/1 "JetBrains Mono", ui-monospace, monospace; color: var(--accent); display: block; margin-bottom: 12px; }
.step p { color: var(--muted); font-size: .97rem; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; row-gap: 36px; } }
@media (max-width: 540px) { .steps { grid-template-columns: 1fr; } .step { padding-right: 0; } }

.objectives {
  margin-top: 56px; padding: 24px 28px;
  border: 1px dashed var(--line); border-radius: var(--radius);
  background: var(--surface);
}
.objectives__label { font-weight: 600; margin-bottom: 12px; }
.objectives ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px 28px; color: var(--muted); }
.objectives code { color: var(--accent-2); margin-right: 4px; }

/* Industries */
.industries { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.industry { background: var(--surface); padding: 32px 28px; }
.industry p { color: var(--muted); font-size: .97rem; margin: 0; }

/* About */
.about { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.about__body p { color: var(--muted); font-size: 1.1rem; }
@media (max-width: 820px) { .about { grid-template-columns: 1fr; gap: 8px; } }

/* Contact */
.contact { text-align: center; background: radial-gradient(ellipse at 50% 120%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%); }
.contact__inner { max-width: 680px; }
.contact p { color: var(--muted); font-size: 1.1rem; margin-bottom: 2rem; }
@media (max-width: 420px) { .btn--large { font-size: 1rem; padding: .9em 1.4em; } }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 28px 0; font-size: .9rem; color: var(--muted); }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer p { margin: 0; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* AI agent */
.agent { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.agent__lead { color: var(--muted); font-size: 1.08rem; }
.brief {
  margin: 0; padding: 28px;
  background: var(--flow-bg); color: #e8edf7;
  border: 1px solid var(--line); border-radius: 20px;
  box-shadow: var(--shadow);
  font-size: .95rem;
}
.brief__label { font: 500 .75rem/1 "JetBrains Mono", ui-monospace, monospace; text-transform: uppercase; letter-spacing: .12em; color: #6f7c96; margin-bottom: 10px; }
.brief__goal { font-size: 1.1rem; font-weight: 500; padding-bottom: 18px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.brief__plan { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; counter-reset: plan; color: #b9c3d8; }
.brief__plan li { display: grid; grid-template-columns: 7.5em 1fr; gap: 12px; counter-increment: plan; }
.brief__plan span { font: 500 .85rem/1.6 "JetBrains Mono", ui-monospace, monospace; color: #5b8cff; }
.brief__plan span::before { content: counter(plan) " "; color: #6f7c96; }
@media (max-width: 860px) { .agent { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .brief { padding: 20px; } .brief__plan li { grid-template-columns: 1fr; gap: 2px; } }