:root {
  --bg: #f6f7f9;
  --bg-alt: #eceff3;
  --surface: #ffffff;
  --ink: #0e1a2b;
  --ink-soft: #4a5568;
  --line: #d8dde5;
  --accent: #c75f14;
  --accent-ink: #ffffff;
  --grid: rgba(14, 26, 43, 0.06);
  --radius: 14px;
  --max: 1120px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1422;
    --bg-alt: #0f1b2d;
    --surface: #13213a;
    --ink: #e8edf5;
    --ink-soft: #9aa8bd;
    --line: #22324d;
    --accent: #f59a4f;
    --accent-ink: #0b1422;
    --grid: rgba(150, 180, 220, 0.07);
    color-scheme: dark;
  }
}

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

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

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

.mono { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
.dim { color: var(--ink-soft); }
.accent { color: var(--accent); }

a { color: inherit; }

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

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); font-weight: 700; max-width: 22ch; }
h3 { font-size: 1.1rem; font-weight: 600; }
p { margin: 0; }

.eyebrow { font-size: 0.82rem; color: var(--accent); letter-spacing: 0.02em; margin-bottom: 16px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 600; text-decoration: none; white-space: nowrap;
  border: 1px solid var(--accent);
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px -8px var(--accent); }
.btn:focus-visible, nav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { box-shadow: none; border-color: var(--ink-soft); }
.btn-small { padding: 7px 16px; font-size: 0.9rem; }
.btn-large { padding: 16px 30px; font-size: 1.1rem; margin-top: 32px; word-break: break-all; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { white-space: nowrap; display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; letter-spacing: -0.01em; }
.nav nav { display: flex; align-items: center; gap: 28px; }
.nav nav a:not(.btn) { text-decoration: none; color: var(--ink-soft); font-size: 0.95rem; }
.nav nav a:not(.btn):hover { color: var(--ink); }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 112px 0 96px; }
.grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at 30% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 40%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; }
.lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 46ch; margin-top: 24px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.spec { display: flex; flex-wrap: wrap; gap: 40px; margin: 64px 0 0; padding-top: 24px; border-top: 1px dashed var(--line); font-size: 0.85rem; }
.spec dt { color: var(--ink-soft); }
.spec dd { margin: 4px 0 0; color: var(--ink); font-weight: 500; }

/* Sections */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section-lede { color: var(--ink-soft); font-size: 1.1rem; max-width: 56ch; margin-top: 16px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 48px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: border-color .2s ease, transform .2s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card p { color: var(--ink-soft); margin-top: 8px; font-size: 0.97rem; }
.icon {
  width: 44px; height: 44px; border-radius: 10px; margin-bottom: 20px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.icon svg { width: 22px; height: 22px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.two-col { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: start; }
.principles { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.principles li {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px;
}
.principles .num { color: var(--accent); font-size: 0.85rem; padding-top: 3px; min-width: 24px; }
.principles p { color: var(--ink-soft); margin-top: 4px; font-size: 0.97rem; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 48px; border-top: 1px solid var(--line); }
.step { padding: 28px 24px 0 0; position: relative; }
.step::before {
  content: ""; position: absolute; top: -5px; left: 0;
  width: 9px; height: 9px; border-radius: 50%; background: var(--accent);
}
.step-n { color: var(--ink-soft); font-size: 0.85rem; display: block; margin-bottom: 10px; }
.step p { color: var(--ink-soft); margin-top: 8px; font-size: 0.97rem; }

/* Contact band is always dark, regardless of theme */
.contact { text-align: center; background: #0e1a2b; color: #e8edf5; }
.contact .eyebrow { color: #f59a4f; }
.contact .section-lede { color: #9aa8bd; margin-inline: auto; }
.contact h2 { margin-inline: auto; }
.contact .btn { background: #f59a4f; border-color: #f59a4f; color: #0b1422; }
.contact-inner { display: flex; flex-direction: column; align-items: center; }

.footer { padding: 28px 0; border-top: 1px solid var(--line); font-size: 0.9rem; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* Responsive */
@media (max-width: 860px) {
  .two-col { grid-template-columns: 1fr; gap: 40px; }
  .steps { grid-template-columns: 1fr 1fr; row-gap: 40px; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .nav nav a:not(.btn) { display: none; }
  .hero { padding: 72px 0 64px; }
  .section { padding: 72px 0; }
  .steps { grid-template-columns: 1fr; }
  .spec { gap: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .card { transition: none; }
}