/* -------------------- Buttons -------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.65rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-lg { padding: 0.85rem 1.6rem; font-size: 1rem; }
.btn-sm { padding: 0.5rem 0.95rem; font-size: 0.875rem; }

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06) inset, 0 8px 24px rgba(15, 118, 110, 0.35);
}
.btn-primary:hover {
  background: var(--primary-bright);
  border-color: var(--primary-bright);
  color: #FFFFFF;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset, 0 10px 32px rgba(20, 184, 166, 0.5);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--primary-dark);
  border-color: var(--primary);
}
.btn-secondary:hover {
  background: var(--tint);
  color: var(--primary-darker);
  border-color: var(--primary-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--on-dark-heading);
  border-color: var(--on-dark-border-strong);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--on-dark-heading);
  border-color: rgba(255, 255, 255, 0.3);
}
.btn-ghost-light {
  background: transparent;
  color: var(--heading);
  border-color: var(--border-strong);
}
.btn-ghost-light:hover {
  background: var(--surface-cream);
  color: var(--primary-dark);
  border-color: var(--primary);
}

.btn-on-dark-primary { background: #FFFFFF; color: var(--primary-darker); border-color: #FFFFFF; }
.btn-on-dark-primary:hover { background: var(--tint); color: var(--primary-darker); border-color: var(--tint); }
.btn-on-dark-ghost {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.5);
}
.btn-on-dark-ghost:hover { background: rgba(255, 255, 255, 0.1); border-color: #FFFFFF; }

.btn .arrow { transition: transform 0.15s ease; }
.btn:hover .arrow { transform: translateX(3px); }