.btn{border-radius:var(--radius-md);transition:var(--transition);cursor:pointer;white-space:nowrap;border:none;justify-content:center;align-items:center;font-weight:600;text-decoration:none;display:inline-flex}.btn-sm{padding:.5rem 1rem;font-size:.875rem}.btn-md{padding:.75rem 1.5rem;font-size:1rem}.btn-lg{padding:1rem 2rem;font-size:1.125rem}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--primary-dark);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background-color:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover:not(:disabled){background-color:var(--border-color);box-shadow:var(--shadow-sm)}.btn-danger{background-color:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background-color:#dc2626}.btn-success{background-color:var(--success);color:#fff}.btn-success:hover:not(:disabled){background-color:var(--success-dark)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}