.btn{display:inline-block;padding:.5rem 1rem;border-radius:6px;border:none;cursor:pointer;font-size:.875rem;font-weight:500;text-decoration:none;transition:background .15s}.btn-primary{background:#3b82f6;color:#fff}.btn-primary:hover{background:#2563eb}.btn-danger{background:#ef4444;color:#fff}.btn-danger:hover{background:#dc2626}.btn-ghost{background:rgba(0,0,0,0);color:#94a3b8;border:1px solid #334155}.btn-ghost:hover{background:#1e293b}.btn-sm{padding:.25rem .75rem;font-size:.8rem}.login-btn{display:inline-block;background:#3b82f6;color:#fff;text-decoration:none;padding:.75rem 2rem;border-radius:8px;font-size:1rem;font-weight:500;transition:background .15s}.login-btn:hover{background:#2563eb}