body {
    background: #000 url('Pics/background.png') no-repeat center center fixed;
    background-size: cover;
    }

    /* Smooth mobile menu transition (no padding on the outer container) */
    #mobile-menu {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, opacity 0.4s ease;
    }