:root {
  --navy-900: #060a14;
  --navy-800: #0a1120;
  --navy-700: #101b30;
  --navy-600: #16243f;
  --line: rgba(120, 150, 190, 0.14);
  --silver: #d8dee8;
  --silver-dim: #96a2b5;
  --blue: #2f80ed;
  --blue-bright: #4f9bff;
  --text: #eef1f6;
  --text-dim: #9aa6ba;
  --radius: 14px;
  --maxw: 1080px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--navy-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 50% -10%, rgba(47, 128, 237, 0.16), transparent 60%),
    radial-gradient(700px 500px at 85% 20%, rgba(79, 155, 255, 0.08), transparent 55%),
    linear-gradient(180deg, var(--navy-900), var(--navy-800));
}

main, .nav, .footer { position: relative; z-index: 1; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  padding: 0.85rem 1.6rem;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue-bright), var(--blue));
  box-shadow: 0 8px 24px rgba(47, 128, 237, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(47, 128, 237, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-outline {
  color: var(--text);
  border-color: rgba(150, 180, 220, 0.35);
  background: rgba(255, 255, 255, 0.02);
}
.btn-outline:hover {
  border-color: var(--blue-bright);
  color: #fff;
  background: rgba(47, 128, 237, 0.1);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--blue-bright); color: #fff; }

.btn-sm { padding: 0.55rem 1.05rem; font-size: 0.88rem; }

/* ---------- Nav ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}
.nav-brand img { width: 38px; height: 38px; border-radius: 50%; }
.nav-brand strong { color: var(--blue-bright); font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 0.95rem; transition: color 0.15s ease; }
.nav-links a:hover { color: var(--text); }
.nav-links a.btn:hover { color: #fff; }

/* ---------- Hero ---------- */
.hero {
  max-width: 820px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 5rem;
  text-align: center;
}
.hero-logo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin-bottom: 2rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(120, 150, 190, 0.15);
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--blue-bright);
  margin-bottom: 1.1rem;
}
.eyebrow.center { text-align: center; }
h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
h1 .accent {
  background: linear-gradient(120deg, var(--silver), var(--blue-bright));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lead {
  font-size: 1.18rem;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 2.4rem;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 1rem; }
.cta-row.center { justify-content: center; }
.hero .cta-row { justify-content: center; }

/* ---------- Approach ---------- */
.approach {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 4rem 1.5rem;
  text-align: center;
}
h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 1rem;
}
.section-lead {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 3rem;
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  text-align: left;
}
.card {
  background: linear-gradient(180deg, rgba(22, 36, 63, 0.55), rgba(16, 27, 48, 0.35));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 155, 255, 0.4);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
}
.card-mark {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--blue-bright);
  margin-bottom: 1.1rem;
}
.card h3 { font-size: 1.35rem; margin-bottom: 0.6rem; letter-spacing: -0.01em; }
.card p { color: var(--text-dim); font-size: 1rem; }

/* ---------- Contact ---------- */
.contact {
  padding: 3rem 1.5rem 5rem;
}
.contact-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(47, 128, 237, 0.14), transparent 70%),
    linear-gradient(180deg, rgba(22, 36, 63, 0.5), rgba(16, 27, 48, 0.3));
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 3.5rem 2rem;
}
.contact-line {
  margin-top: 2rem;
  color: var(--text-dim);
  font-size: 1rem;
}
.contact-line a { color: var(--text); text-decoration: none; }
.contact-line a:hover { color: var(--blue-bright); }
.contact-line .dot { margin: 0 0.75rem; color: var(--silver-dim); }

/* ---------- Footer ---------- */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--silver-dim);
  font-size: 0.9rem;
}
.footer-tag { color: var(--text-dim); letter-spacing: 0.02em; }

/* ---------- Responsive ---------- */
@media (max-width: 780px) {
  .cards { grid-template-columns: 1fr; }
  .nav-links a[href="#approach"], .nav-links a[href="#contact"]:not(.btn) { display: none; }
}
@media (max-width: 480px) {
  .hero { padding-top: 3rem; }
  .btn { width: 100%; }
  .cta-row { flex-direction: column; }
}