.menu-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    z-index: 1000;
}

#menu-toggle {
    display: none;
}

.menu-btn {
    width: 48px;
    height: 48px;
    background-color: #333;
    border-radius: 6px;
    cursor: pointer;
    position: absolute;
    top: 12px;
    right: 24px;
    z-index: 1002;

    -webkit-appearance: none;

    appearance: none;
    display: block;
}

.menu-btn span {
    position: absolute;
    left: 9px;
    width: 30px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-btn span:nth-child(1) {
    top: 12px;
}

.menu-btn span:nth-child(2) {
    top: 22px;
}

.menu-btn span:nth-child(3) {
    top: 32px;
}

#menu-toggle:checked + label span:nth-child(1) {
    transform: rotate(45deg);
    top: 22px;
}

#menu-toggle:checked + label span:nth-child(2) {
    opacity: 0;
}

#menu-toggle:checked + label span:nth-child(3) {
    transform: rotate(-45deg);
    top: 22px;
}

.menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    background: #444;
    padding-top: 64px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    z-index: 1000;
}

.menu a {
    display: block;
    padding: 1em;
    color: white;
    text-decoration: none;
    border-bottom: 1px solid #555;
}

.menu a:last-child {
    border-bottom: none;
}

#menu-toggle:checked + label + .menu {
    display: block;
}

@media (min-width: 769px) {
    .menu-container {
        display: none;
    }
}