:root {
  --navy-950: #070d18;
  --navy-900: #0a1322;
  --navy-800: #0f1d33;
  --navy-700: #16294a;
  --ink: #16202e;
  --slate: #4a5568;
  --slate-light: #94a3b8;
  --bg: #ffffff;
  --bg-alt: #f4f6fa;
  --line: #e3e8f0;
  --line-dark: #1d2f4d;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --cyan: #38bdf8;
  --mono: Consolas, "Cascadia Code", ui-monospace, "SF Mono", monospace;
  --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --max: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 28px; }
h1, h2, h3 { font-weight: 650; letter-spacing: -0.015em; line-height: 1.2; }
a { color: var(--accent); }

.kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}
.dark .kicker { color: var(--cyan); }

/* ---------- Header ---------- */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 19, 34, 0.96);
  border-bottom: 1px solid var(--line-dark);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.brand { display: flex; align-items: baseline; gap: 12px; text-decoration: none; }
.brand .mark {
  color: #fff; font-size: 1.22rem; font-weight: 700; letter-spacing: 0.01em;
}
.brand .mark .amp { color: var(--cyan); font-weight: 400; }
.brand .tag {
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.24em;
  color: var(--slate-light); text-transform: uppercase;
}
nav.links { display: flex; align-items: center; gap: 34px; }
nav.links a {
  color: #cbd5e1; text-decoration: none; font-size: 0.92rem; font-weight: 500;
  padding: 4px 0; border-bottom: 2px solid transparent;
}
nav.links a:hover { color: #fff; }
nav.links a.active { color: #fff; border-bottom-color: var(--cyan); }
nav.links a.nav-cta {
  background: var(--accent); color: #fff; padding: 10px 20px;
  border-radius: 6px; border-bottom: none; font-weight: 600;
}
nav.links a.nav-cta:hover { background: var(--accent-dark); }

/* ---------- Dark sections / heroes ---------- */
.dark {
  background:
    radial-gradient(ellipse 900px 420px at 75% -10%, rgba(37, 99, 235, 0.22), transparent),
    linear-gradient(rgba(56, 189, 248, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.045) 1px, transparent 1px),
    var(--navy-900);
  background-size: auto, 44px 44px, 44px 44px, auto;
  color: #e2e8f0;
}
.dark h1, .dark h2, .dark h3 { color: #fff; }

.hero { padding: 108px 0 100px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 4.6vw, 3.5rem); margin: 18px 0 0; }
.hero p.lead { margin-top: 22px; font-size: 1.14rem; color: #b6c2d4; max-width: 540px; }

.page-hero { padding: 76px 0 64px; }
.page-hero h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin-top: 14px; }
.page-hero p.lead { margin-top: 16px; font-size: 1.1rem; color: #b6c2d4; max-width: 640px; }

.cta-row { margin-top: 38px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 14px 30px; border-radius: 6px;
  text-decoration: none; font-size: 0.98rem; font-weight: 600; letter-spacing: 0.01em;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline { color: #e2e8f0; border: 1px solid #3b4f70; }
.btn-outline:hover { border-color: var(--cyan); color: #fff; }
.btn-outline-light { color: var(--ink); border: 1px solid #b9c4d4; }
.btn-outline-light:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Capability strip ---------- */
.strip {
  border-top: 1px solid var(--line-dark);
  background: var(--navy-950);
  padding: 18px 0;
}
.strip .wrap {
  display: flex; gap: 14px 34px; flex-wrap: wrap; justify-content: center;
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.18em;
  color: var(--slate-light);
}
.strip span::before { content: "▸ "; color: var(--accent); }
.strip .strip-label { color: #8fa3bd; letter-spacing: 0.08em; text-transform: uppercase; }
.strip .strip-label::before { content: none; }

/* ---------- Light sections ---------- */
section.block { padding: 88px 0; }
section.block-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { margin-bottom: 48px; max-width: 680px; }
.section-head h2 { font-size: 2rem; margin-top: 10px; }
.section-head p { color: var(--slate); margin-top: 14px; }

.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }

.card {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 34px 30px; position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
}
.card h3 { font-size: 1.18rem; margin: 14px 0 12px; }
.card p { color: var(--slate); font-size: 0.95rem; }
.card .num { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.2em; color: var(--accent); }
.card ul { margin: 14px 0 0 18px; color: var(--slate); font-size: 0.93rem; }
.card ul li { margin-bottom: 7px; }
.card a.more { display: inline-block; margin-top: 18px; font-weight: 600; text-decoration: none; font-size: 0.93rem; }
.card a.more:hover { text-decoration: underline; }

/* ---------- Why band ---------- */
.why-band { padding: 92px 0; text-align: center; }
.why-band .kicker { color: var(--cyan); }
.why-band blockquote {
  max-width: 780px; margin: 26px auto 0; font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  font-weight: 550; line-height: 1.5; color: #fff; letter-spacing: -0.01em;
}
.why-band blockquote em { color: var(--cyan); font-style: normal; }

/* ---------- Principles ---------- */
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.principle {
  display: flex; gap: 20px; align-items: baseline;
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 24px 26px;
}
.principle .p-num {
  font-family: var(--mono); font-size: 0.95rem; color: var(--accent);
  min-width: 34px; font-weight: 600;
}
.principle p { font-size: 1.02rem; font-weight: 550; color: var(--ink); }

/* ---------- Credibility checks ---------- */
.checks { display: flex; flex-wrap: wrap; gap: 18px 44px; margin-top: 8px; }
.check-item { display: flex; align-items: center; gap: 13px; font-weight: 600; font-size: 1.06rem; color: var(--ink); }
.check-item .ck {
  flex: none; width: 27px; height: 27px; border-radius: 50%;
  background: rgba(37, 99, 235, 0.12); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
}

/* ---------- Process steps ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.step { border-left: 2px solid var(--line); padding-left: 20px; }
.step .s-num { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.2em; color: var(--accent); }
.step h3 { font-size: 1.05rem; margin: 10px 0 8px; }
.step p { color: var(--slate); font-size: 0.9rem; }

/* ---------- Tech grid ---------- */
.tech-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.tech {
  font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.1em;
  border: 1px solid var(--line); border-radius: 6px; padding: 10px 18px;
  color: var(--ink); background: var(--bg);
}
.tech.soon { color: var(--slate); border-style: dashed; }

/* ---------- Service detail ---------- */
.svc { display: grid; grid-template-columns: 0.38fr 0.62fr; gap: 44px; padding: 64px 0; border-bottom: 1px solid var(--line); }
.svc:last-of-type { border-bottom: none; }
.svc h2 { font-size: 1.6rem; margin-top: 10px; }
.svc .svc-body p { color: var(--slate); margin-bottom: 16px; }
.svc .svc-body h4 { font-size: 0.85rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink); margin: 22px 0 10px; }
.svc .svc-body ul { margin-left: 18px; color: var(--slate); }
.svc .svc-body ul li { margin-bottom: 8px; }

/* ---------- Contact ---------- */
.contact-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; max-width: 760px; }
.contact-card {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 36px 32px; text-align: center;
}
.contact-card .kicker { display: block; margin-bottom: 12px; }
.contact-card a.email {
  font-size: 1.15rem; font-weight: 650; text-decoration: none; color: var(--ink);
}
.contact-card a.email:hover { color: var(--accent); }
.contact-card p { color: var(--slate); font-size: 0.92rem; margin-top: 10px; }

/* ---------- Contact form ---------- */
.contact-layout { display: grid; grid-template-columns: 1.1fr 0.8fr; gap: 56px; align-items: start; }
.cform {
  margin-top: 26px; display: grid; gap: 22px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 38px 34px; position: relative; overflow: hidden;
  box-shadow: 0 10px 32px rgba(22, 32, 46, 0.07);
}
.cform::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
}
.cform .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.cform label {
  display: block; font-family: var(--mono); font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--slate);
  margin-bottom: 9px;
}
.cform label .opt {
  font-family: var(--sans); font-weight: 400; text-transform: none;
  letter-spacing: 0.02em; color: var(--slate-light);
}
.cform input, .cform textarea {
  width: 100%; padding: 13px 15px; border: 1px solid #cbd5e1; border-radius: 8px;
  font: inherit; font-size: 0.98rem; color: var(--ink); background: #f8fafc;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.cform input::placeholder, .cform textarea::placeholder { color: #a3aebf; }
.cform input:hover, .cform textarea:hover { border-color: #a8b6c9; }
.cform input:focus, .cform textarea:focus {
  outline: none; border-color: var(--accent); background: #fff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}
.cform textarea { min-height: 220px; resize: vertical; line-height: 1.6; }
.cform button.btn {
  border: none; cursor: pointer; width: 100%; padding: 16px;
  font-size: 1.02rem; margin-top: 4px;
}
.contact-side .contact-card { text-align: left; margin-bottom: 18px; padding: 28px 26px; }
.contact-side .contact-card a.email { font-size: 1.05rem; }

/* ---------- CTA band ---------- */
.cta-band { padding: 84px 0; text-align: center; }
.cta-band h2 { font-size: 2rem; }
.cta-band p { color: #b6c2d4; margin: 16px auto 34px; max-width: 520px; }

/* ---------- Footer ---------- */
footer.site {
  background: var(--navy-950); color: var(--slate-light);
  padding: 52px 0 40px; border-top: 1px solid var(--line-dark);
}
.foot { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.foot .brand .mark { font-size: 1.05rem; }
.foot nav { display: flex; gap: 24px; }
.foot nav a { color: var(--slate-light); text-decoration: none; font-size: 0.88rem; }
.foot nav a:hover { color: #fff; }
.foot .mail { font-family: var(--mono); font-size: 0.82rem; }
.foot .mail a { color: var(--slate-light); text-decoration: none; display: block; margin-bottom: 6px; }
.foot .mail a:hover { color: var(--cyan); }
.copy { margin-top: 36px; font-size: 0.8rem; color: #64748b; }

/* ---------- Hero diagram ---------- */
.hero-art { display: flex; justify-content: center; }
.hero-art svg { width: 100%; max-width: 420px; height: auto; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { display: none; }
  .grid3, .grid2, .principles, .contact-cards, .contact-layout, .cform .row2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .svc { grid-template-columns: 1fr; gap: 16px; padding: 48px 0; }
  nav.links a:not(.nav-cta) { display: none; }
  .hero { padding: 72px 0 64px; }
}