body { background: linear-gradient(54deg, var(--petrol-dark) 0%, var(--petrol-light) 100%); background-attachment: fixed;  }  .btn-gray-gradient-bg, .gray-gradient-card-bg { background: linear-gradient(54deg, var(--btn-01) 0%, var(--btn-02) 100%); }  .btn-gray-gradient-bg:hover, .gray-gradient-card-bg:hover { filter: brightness(1.1); }