.btn{justify-content:center;align-items:center;gap:var(--space-2);font-family:var(--font-body);border-radius:var(--radius-lg);min-height:var(--touch-target);transition:transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);-webkit-user-select:none;user-select:none;cursor:pointer;font-weight:600;display:inline-flex}.btn:active:not(:disabled){transform:scale(.98)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-full{width:100%}.btn-sm{padding:0 var(--space-3);font-size:var(--size-sm);min-height:38px}.btn-md{padding:0 var(--space-5);font-size:var(--size-base);min-height:var(--touch-target)}.btn-lg{padding:0 var(--space-6);font-size:var(--size-lg);min-height:54px}.btn-primary{background-color:var(--color-brand-teal);color:var(--color-text-inverse);box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){background-color:var(--color-brand-teal-light);box-shadow:var(--shadow-lg)}.btn-secondary{background-color:var(--color-bg-secondary);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background-color:var(--color-border)}.btn-outline{color:var(--color-brand-teal);border:2px solid var(--color-brand-teal);background-color:#0000}.btn-outline:hover:not(:disabled){background-color:#0d737714}.btn-ghost{color:var(--color-text-secondary);background-color:#0000}.btn-ghost:hover:not(:disabled){color:var(--color-text-primary);background-color:var(--color-bg-secondary)}