3-styles.css

/* 3-styles.css */

body {
    background-color: whitesmoke;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.menu {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    position: relative;
    margin-top: 10rem;
}

.menu-open-button {
    cursor: pointer;
    width: 60px;
    height: 60px;
    background-color: rgb(196, 18, 18);
    border-radius: 50%;
}

.menu-open-button span {
    background-color: white;
    height: 2px;
    position: absolute;
    width: 50%;
    margin-top: 23px;
    left: 25%;
    transition: all 0.3s ease;
}

.menu-open-button span:first-child {
    top: 0;
}

.menu-open-button span:nth-child(2) {
    top: 6px;
}

.menu-open-button span:last-child {
    top: 12px;
}

input[type="checkbox"]:checked + .menu-open-button span:nth-child(2) {
    opacity: 0;
}

input[type="checkbox"]:checked + .menu-open-button span:first-child,
input[type="checkbox"]:checked + .menu-open-button span:last-child {
    top: 6px;
}

input[type="checkbox"]:checked + .menu-open-button span:first-child {
    transform: rotate(45deg);
}

input[type="checkbox"]:checked + .menu-open-button span:last-child {
    transform: rotate(-45deg);
}

input[type="checkbox"] {
    display: none;
}

.menu-item {
    display: none;
}

input[type="checkbox"]:checked ~ .menu-item {
    background-color: rgb(196, 18, 18);
    color: white;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}

input[type="checkbox"]:checked ~ .menu-item:hover {
    background-color: white;
    color: rgb(196, 18, 18);
}

.menu-open-button:hover {
    width: 65px;
    height: 65px;
}

.menu-open-button:hover span {
    margin-top: 27px;
}

input[type="checkbox"]:checked + .menu-open-button span {
    margin-top: 23px;
}