.btn{padding:var(--space-2)var(--space-4);border-radius:var(--border-radius-md);cursor:pointer;transition-property:background-color,transform,box-shadow;transition-duration:var(--transition-duration);transition-timing-function:var(--transition-timing);border:none;outline:none;font-weight:700}.btn-small{padding:var(--space-1)var(--space-3);font-size:.875rem}.btn:focus-visible{outline:2px solid var(--color-primary-light);outline-offset:2px}.btn:disabled{opacity:.6;cursor:not-allowed;box-shadow:none;transform:none}.btn-primary{background-color:var(--color-primary-dark);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){background-color:var(--color-primary);box-shadow:var(--shadow-lg),var(--shadow-glow-md);transform:translateY(-2px)}.btn-secondary{background-color:var(--color-surface-2);color:var(--color-text-secondary)}.btn-secondary:hover:not(:disabled){background-color:hsl(var(--color-slate-hue),20%,41%)}.btn-success{background-color:var(--color-success);color:#fff;box-shadow:var(--shadow-md)}.btn-success:hover:not(:disabled){background-color:var(--color-success-dark);box-shadow:var(--shadow-lg),var(--shadow-glow-md);transform:translateY(-2px)}.btn-warning{background-color:var(--color-warning);color:var(--color-text-primary);box-shadow:var(--shadow-md)}.btn-warning:hover:not(:disabled){background-color:var(--color-warning-dark);box-shadow:var(--shadow-lg),var(--shadow-glow-md);transform:translateY(-2px)}.btn-danger{background-color:var(--color-danger);color:#fff;box-shadow:var(--shadow-md)}.btn-danger:hover:not(:disabled){background-color:var(--color-danger-dark);box-shadow:var(--shadow-lg),var(--shadow-glow-md);transform:translateY(-2px)}.btn-full-width{width:100%}