#mobile-menu {
    position: fixed;
    top: 0;
    left: -250px;
    width: 250px;
    height: 100%;
    background: #333;
    color: white;
    transition: left 0.3s ease-in-out;
    z-index: 1000;
    padding: 1em;
    padding-top: 9rem;
}
#mobile-menu.open {
    left: 0;
}
#mobile-menu ul {
    list-style: none;
    padding: 0;
}
#mobile-menu ul li {
    margin: 1em 0;
}
#menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 1em;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    position: relative;
}
#menu-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: white;
    transition: transform 0.3s ease, opacity 0.3s ease;
}
#mobile-menu.open + #menu-toggle .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
#mobile-menu.open + #menu-toggle .bar:nth-child(2) {
    opacity: 0;
}
#mobile-menu.open + #menu-toggle .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}
header {
    position: relative;
}
@media (min-width: 768px) {
    #menu-toggle {
        display: none;
    }
    #mobile-menu {
        position: static;
        width: auto;
        height: auto;
        background: none;
        color: inherit;
        padding: 0;
        display: block;
        left: 0 !important;
        transition: none;
    }
    #mobile-menu ul {
        display: flex;
        gap: 1em;
    }
    #mobile-menu li {
        position: relative;
    }
    #mobile-menu a {
        color: white;
        text-decoration: none;
        padding: 0.5em 1em;
        display: block;
        transition: background 0.3s;
    }
    #mobile-menu a:hover {
        background-color: rgba(255,255,255,0.1);
    }
    #mobile-menu .sub-menu {
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        position: absolute;
        top: 100%;
        left: 0;
        background-color: #444;
        min-width: 200px;
        z-index: 1001;
        transition: all 0.3s ease;
    }
    #mobile-menu li:hover > .sub-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    #mobile-menu .sub-menu li {
        width: 100%;
    }
    #mobile-menu .sub-menu a:hover {
        background-color: rgba(255,255,255,0.2);
    }
}