.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(248, 250, 252, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--mist);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 16px;
}

.logo {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--steel);
  font-weight: 500;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
}

.nav a:hover {
  background: var(--soft-signal);
  text-decoration: none;
}

.main {
  padding-bottom: 72px;
}

.section {
  padding: 64px 0;
}

.section-tight {
  padding: 48px 0;
}

.hero {
  padding: 88px 0 64px;
}

.footer {
  border-top: 1px solid var(--mist);
  padding: 48px 0;
  background: white;
}

.footer .cols {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.footer .cols strong {
  display: block;
  margin-bottom: 10px;
}

.footer a {
  display: block;
  color: var(--steel);
  margin: 8px 0;
}

.footer a:hover {
  color: var(--ink);
  text-decoration: none;
}

.footer .fine {
  margin-top: 32px;
  color: var(--steel);
  font-size: 14px;
}

@media (max-width: 900px) {
  .footer .cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .hero { padding: 64px 0 48px; }
  .section { padding: 56px 0; }
  .footer .cols { grid-template-columns: 1fr; }
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }


/* DEFINITIVE PRIMARY BUTTON STYLE */
a.btn.btn-primary {
  background-color: #2563eb !important;
  color: #ffffff !important;
  border: 2px solid #2563eb !important;
}

a.btn.btn-primary:hover {
  background-color: #1e40af !important;
  border-color: #1e40af !important;
  color: #ffffff !important;
}