.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--font-size-md);
  font-weight: 700;
  line-height: 1;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  min-height: 52px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-trust-blue), var(--color-navy));
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(45,108,186,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(45,108,186,0.45);
  background: linear-gradient(135deg, var(--color-trust-hover), var(--color-navy));
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}
.btn-secondary:hover {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold), #a87a30);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(201,168,76,0.35);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201,168,76,0.45);
}

.btn-ghost {
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
  border-color: rgba(255,255,255,0.3);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.5);
}

.btn-lg { font-size: var(--font-size-lg); padding: var(--space-5) var(--space-10); min-height: 60px; }
.btn-sm { font-size: var(--font-size-sm); padding: var(--space-3) var(--space-6); min-height: 44px; }
.btn-full { width: 100%; }

/* Sticky CTA bar */
.sticky-cta {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--color-navy);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  z-index: var(--z-sticky);
  box-shadow: 0 -4px 20px rgba(26,39,68,0.2);
  transform: translateY(100%);
  transition: transform var(--transition-slow);
}
.sticky-cta.visible { transform: translateY(0); }
.sticky-cta p { color: var(--color-white); font-size: var(--font-size-sm); margin: 0; }
.sticky-cta-close {
  background: none; border: none; color: rgba(255,255,255,0.6);
  cursor: pointer; font-size: 1.25rem; line-height: 1; padding: var(--space-1);
}

@media (max-width: 640px) {
  .sticky-cta { flex-direction: column; text-align: center; }
  .sticky-cta p { display: none; }
}