:root {
  --brand-bg: #0b132b;        /* deep navy */
  --brand-accent: #6fffe9;    /* mint accent */
  --brand-text: #e0e6ed;      /* light text */
  --brand-hover: #5ff3de;     /* hover accent */
  --brand-shadow: rgba(0, 0, 0, 0.2);
}

/* Sticky navbar base */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--brand-bg) !important;
  box-shadow: 0 8px 24px var(--brand-shadow);
}

/* Branding / logo */
.navbar-brand {
  color: var(--brand-text) !important;
  font-weight: 700;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.navbar-brand img {
  height: 40px;
  width: auto;
  filter: drop-shadow(0 2px 4px var(--brand-shadow));
}

/* Nav links */
.nav-link {
  color: var(--brand-text) !important;
  font-weight: 500;
  transition: color 160ms ease, transform 160ms ease;
}

.nav-link:hover {
  color: var(--brand-accent) !important;
  transform: translateY(-1px);
}

.nav-link.active {
  color: var(--brand-accent) !important;
}

/* CTA button */
.btn-accent {
  background: var(--brand-accent);
  color: #0b132b;
  border: none;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.btn-accent:hover {
  background: var(--brand-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--brand-shadow);
}

/* Smooth scroll for anchor links */
html {
  scroll-behavior: smooth;
}

/* Spacer to offset sticky navbar height */
main {
  padding-top: 80px;
}