/* ... existing styles ... */

@keyframes wave {
    0% { transform: rotate( 0.0deg) }
    10% { transform: rotate(14.0deg) }
    20% { transform: rotate(-8.0deg) }
    30% { transform: rotate(14.0deg) }
    40% { transform: rotate(-4.0deg) }
    50% { transform: rotate(10.0deg) }
    60% { transform: rotate( 0.0deg) }
    100% { transform: rotate( 0.0deg) }
}
.animate-wave {
    animation: wave 2.5s infinite;
    display: inline-block;
    transform-origin: 70% 70%;
}

#mobile-menu {
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    /* Extra safety to ensure it's hidden when not active */
    visibility: hidden;
}

#mobile-menu.active {
    transform: translateX(0);
    visibility: visible;
}