* {
    box-sizing: border-box;
}

img {
    max-width: 100%;
}

.menu {
    background: lightblue;
    position: fixed;
    top: 0;
    right: -200px;
    height: 100vh;
    width: 200px;
    padding: 10px;
    text-align: center;
    transition: all 1s;
}


.menu.active {
    right: 0;
    background: yellow;
  }

.menu.glow {
    background: lightcoral;
}


.gear {
    background: lightblue;
    width: 50px;
    height: 50px;
    position: fixed;
    bottom: 20px;
    left: 20px;
    transition: transform .5s, background .5s;
}

.gear.active {
    transform: rotate(180deg);
}

.gear.glow {
    background: lightcoral;
}