:root {
  --bg: #0a0e14;
  --bg-alt: #0d131c;
  --surface: #111927;
  --surface-2: #0c1220;
  --ink: #e8eef6;
  --ink-soft: #9db1c7;
  --accent: #2dd4bf;
  --accent-dark: #5eead4;
  --highlight: #f59e0b;
  --line: #1e2a3a;
  --radius: 14px;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  --max: 1120px;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: ui-sans-system, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; }

h1, h2, h3 { line-height: 1.18; letter-spacing: -0.015em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin-bottom: 1rem; }
h3 { font-size: 1.13rem; margin-bottom: 0.45rem; }
p + p { margin-top: 1rem; }
a { color: var(--accent); }
strong { color: var(--ink); }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 14, 20, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 2px 14px rgba(0,0,0,0.4); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; padding-bottom: 14px; }

.logo { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; color: var(--ink); }
.logo-mark { color: var(--accent); flex: none; }
.logo-word { font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; }
.logo-word em { font-style: normal; color: var(--accent); }
.logo-small .logo-word { font-size: 1.1rem; }

.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a { color: var(--ink); text-decoration: none; font-weight: 550; font-size: 0.98rem; }
.site-nav a:hover { color: var(--accent); }
.site-nav a.nav-cta {
  background: var(--accent); color: #052e2b; padding: 8px 18px; border-radius: 999px; font-weight: 700;
}
.site-nav a.nav-cta:hover { background: var(--accent-dark); color: #052e2b; }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; }

/* ---------- hero ---------- */
.hero {
  padding: 88px 0 80px;
  background:
    radial-gradient(680px 340px at 88% -60px, rgba(45, 212, 191, 0.12), transparent 65%),
    radial-gradient(760px 420px at -120px 110%, rgba(245, 158, 11, 0.07), transparent 60%),
    var(--bg);
}
.hero h1 { font-size: clamp(2.2rem, 5.2vw, 3.5rem); max-width: 16em; margin-bottom: 1.3rem; }
.hero h1 .accent { color: var(--accent); }
.hero-sub { font-size: 1.15rem; color: var(--ink-soft); max-width: 46em; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 2rem; }

.btn {
  display: inline-block; text-decoration: none; font-weight: 650;
  padding: 13px 26px; border-radius: 999px; font-size: 1rem;
  transition: transform 0.12s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #052e2b; }
.btn-primary:hover { background: var(--accent-dark); color: #052e2b; }
.btn-ghost { border: 1.5px solid var(--ink-soft); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-large { font-size: 1.12rem; padding: 15px 34px; }

/* ---------- trace figure ---------- */
.trace {
  margin-top: 3rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 14px;
  font-family: var(--mono);
  box-shadow: var(--shadow);
  overflow-x: auto;
}
.trace-head {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 0.82rem; color: var(--ink-soft);
  border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 14px;
}
.trace-total { color: var(--accent); }
.trace-row {
  display: grid; grid-template-columns: minmax(190px, 260px) 1fr 52px;
  align-items: center; gap: 14px; padding: 4.5px 0; font-size: 0.83rem; white-space: nowrap;
}
.trace-name { color: var(--ink); overflow: hidden; text-overflow: ellipsis; }
.trace-name.depth-1 { padding-left: 22px; color: var(--ink-soft); }
.trace-bar { background: #182234; border-radius: 4px; height: 10px; display: block; }
.trace-bar i { display: block; height: 100%; border-radius: 4px; background: var(--accent); opacity: 0.85; }
.trace-bar i.bar-tool { background: #60a5fa; }
.trace-bar i.bar-eval { background: var(--highlight); }
.trace-dur { color: var(--ink-soft); text-align: right; }
.eval-score { color: var(--accent); font-weight: 700; }
.eval-ok { color: var(--accent); font-weight: 700; }
.trace-note { font-family: ui-sans-system, -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 0.85rem; color: var(--ink-soft); margin-top: 12px; }

/* ---------- sections ---------- */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-lede { color: var(--ink-soft); max-width: 46em; margin-bottom: 0.5rem; }

/* pain points */
.pain-list { display: grid; gap: 14px; margin-top: 2.2rem; }
.pain {
  background: var(--surface); border: 1px solid var(--line); border-left: 4px solid #f87171;
  border-radius: 0 var(--radius) var(--radius) 0; padding: 18px 22px;
}
.pain p { color: var(--ink-soft); font-size: 0.98rem; }

/* solution cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin-top: 2.2rem; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow);
}
.card p { color: var(--ink-soft); font-size: 0.98rem; }
.card-icon { font-size: 1.7rem; margin-bottom: 0.7rem; }

/* use cases */
.cases { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; margin-top: 2.2rem; }
.case {
  border-left: 4px solid var(--accent);
  background: var(--surface); border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 22px; box-shadow: var(--shadow);
}
.case p { color: var(--ink-soft); font-size: 0.98rem; }

/* playbook steps */
.steps { list-style: none; margin-top: 2.2rem; display: grid; gap: 18px; max-width: 820px; }
.steps li { display: flex; gap: 20px; align-items: flex-start; }
.step-num {
  flex: none; width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: #052e2b; font-weight: 800; font-size: 1.15rem;
  display: flex; align-items: center; justify-content: center; margin-top: 2px;
}
.steps p { color: var(--ink-soft); }

/* approach + cta */
.approach em { color: var(--accent); font-style: normal; font-weight: 600; }
.cta-band {
  background: linear-gradient(160deg, #0b2e2a, #0a0e14 75%);
  text-align: center; border-top: 1px solid var(--line);
}
.cta-band p { color: var(--ink-soft); margin-bottom: 1.8rem; }

/* footer */
.site-footer { padding: 44px 0 36px; border-top: 1px solid var(--line); background: var(--bg-alt); }
.footer-inner { display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.site-footer p { color: var(--ink-soft); font-size: 0.95rem; }
.footer-fine { font-size: 0.85rem !important; }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* mobile nav */
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 24px 16px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 11px 0; border-bottom: 1px solid var(--line); }
  .site-nav a.nav-cta { text-align: center; margin-top: 10px; border-bottom: 0; }
  .hero { padding: 60px 0 56px; }
  .section { padding: 60px 0; }
  .trace-row { grid-template-columns: minmax(150px, 190px) 1fr 46px; }
}