:root {
  --navy: #0f172a;
  --navy-2: #16213e;
  --sky: #0ea5e9;
  --sky-bright: #38bdf8;
  --slate: #334155;
  --light: #f1f5f9;
  --white: #ffffff;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: "Inter", -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--slate);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--sky); text-decoration: none; }

h1, h2, h3 { color: var(--navy); letter-spacing: -0.01em; margin: 0; }

.eyebrow {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sky);
}

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.card-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.card-grid .reveal:nth-child(3) { transition-delay: 0.16s; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 2px 16px rgba(15, 23, 42, 0.05);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
}
.brand-mark {
  display: block;
  border-radius: 7px;
  background: var(--navy);
}
.brand-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-nav a {
  color: var(--slate);
  font-size: 15px;
  font-weight: 500;
}
.site-nav a:hover { color: var(--navy); }
.nav-cta {
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--navy);
  color: var(--white) !important;
}
.nav-cta:hover { background: var(--navy-2); }

/* Hero */
.hero {
  position: relative;
  background: var(--navy);
  color: var(--white);
  padding: 120px 0 108px;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.09) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 85%);
}
.hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 720px;
  height: 420px;
  background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.28), transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero-inner .eyebrow { color: var(--sky-bright); }
.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  color: var(--white);
}
.hero .lede {
  max-width: 620px;
  margin: 0 auto;
  font-size: 19px;
  color: #cbd5e1;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 36px;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 9px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--sky);
  color: var(--navy) !important;
}
.btn-primary:hover { background: var(--sky-bright); }
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--white) !important;
}
.btn-ghost:hover { border-color: rgba(255, 255, 255, 0.5); }

/* Sections */
.section {
  padding: 88px 0;
}
.section > .wrap > h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 40px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  background: var(--white);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  border-color: var(--sky);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}
.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: #e0f2fe;
  color: var(--sky);
  margin-bottom: 16px;
}
.card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.card p {
  margin: 0;
  font-size: 15px;
  color: var(--slate);
}

/* Contact */
.section-dark {
  background: var(--navy);
  color: var(--white);
}
.contact-inner {
  text-align: center;
}
.contact-inner .eyebrow { color: var(--sky-bright); }
.contact-inner h2 {
  color: var(--white);
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 22px;
}
.contact-email {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  color: var(--white) !important;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--sky);
}
.contact-email:hover { color: var(--sky-bright) !important; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.site-footer .wrap {
  font-size: 13px;
  color: #94a3b8;
}

@media (max-width: 640px) {
  .hero { padding: 88px 0 72px; }
  .section { padding: 64px 0; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .site-nav { gap: 14px; }
  .site-nav a:not(.nav-cta) { display: none; }
}

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