:root {
  --bg-dark: #0b132b;
  --bg-dark-2: #1b263b;
  --primary: #2f80ed;
  --opal: #a0e7e5;
}

.bg-gradient-nav {
  background: linear-gradient(90deg, var(--bg-dark-2), #0e223a);
}

.hero-section {
  background: radial-gradient(1200px 600px at 10% 10%, rgba(47,128,237,0.25), transparent 60%),
              radial-gradient(900px 400px at 90% 20%, rgba(160,231,229,0.2), transparent 60%),
              linear-gradient(180deg, var(--bg-dark), #0f2040);
  position: relative;
}

.hero-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 1.25rem;
  backdrop-filter: blur(6px);
  color: #fff;
}

.bg-opal {
  background-color: var(--opal);
}

.stat-item {
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: .75rem;
  padding: .75rem 1rem;
  display: inline-block;
}

.shape-divider {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 60px;
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0));
}

.feature-item {
  display: flex; gap: .75rem; align-items: center;
  padding: .75rem; border: 1px solid #eef2f6; border-radius: .75rem; background: #fff;
}

.platform-card {
  padding: 1.25rem; background: #fff; border-radius: 1rem; border: 1px solid #eef2f6;
  box-shadow: 0 6px 18px rgba(16,24,40,0.06);
}

.arch-card { padding: 1rem; background: #fff; border: 1px solid #eef2f6; border-radius: 1rem; }
.arch-icon { width: 48px; height: 48px; border-radius: .75rem; display: grid; place-items: center; margin-bottom: .5rem; }

.metric { background: #fff; border: 1px solid #eef2f6; border-radius: .75rem; padding: .75rem; }
.metric-value { font-weight: 800; font-size: 1.5rem; }
.metric-label { color: #6b7280; font-size: .8rem; }

.step-card { background: #fff; border: 1px solid #eef2f6; border-radius: .75rem; padding: 1rem; }
.step-num { width: 32px; height: 32px; border-radius: .5rem; background: #eef2f6; color: #111827; display: grid; place-items: center; font-weight: 700; margin-bottom: .5rem; }

.tech-item { padding: .75rem 1rem; border: 1px dashed #e5e7eb; border-radius: .75rem; background: #fff; }

footer { background: #fff; }

.back-to-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 1040; border-radius: 50%; width: 44px; height: 44px; display: grid; place-items: center;
  box-shadow: 0 8px 18px rgba(16,24,40,0.18);
}

/* Utilities */
.text-white-50 { color: rgba(255,255,255,0.65) !important; }

/* Nav active state */
.navbar .nav-link.active { color: #fff; font-weight: 600; }

/* Forms */
.form-control:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 .25rem rgba(47,128,237,0.15);
}

@media (max-width: 575.98px) {
  .display-5 { font-size: 2rem; }
}