@keyframes box {
    0% {
        position: absolute;
        top: 0;
        left: 0;
        background: red;
    }
    25% {
        position:absolute;
        top: calc(100% - 100px);
        left: 0;
        background: blue;
    }
    50% {
        position: absolute;
        top: calc(100% - 100px);
        left: calc(100% - 100px);
        background: green;
    }
    75% {
        position: absolute;
        top: 0;
        left: calc(100% - 100px);
        background: yellow;
    }
    100% {
        position: absolute;
        top: 0;
        left: 0;
        background: red;
    }

}

body {
    margin: 0;
}

html {
    box-sizing: border-box;
}

.cards {
    background: #0d5825;
    height: 500px;
    width: auto;
}

.blockquote {
    font-size: 25px;
    text-align: center;
    color: white;
    position: relative;
    top: 10px;
}

.card1 {
    height: 200px;
    width: 150px;
    position: absolute;
    top: 50%;
    left: 53%;
    transform: translate(-47%, -50%) rotate(8deg);
    z-index: 3;
}
.card2 {
    height: 200px;
    width: 150px;
    position: absolute;
    top: 48%;
    left: 51%;
    transform: translate(-49%, -52%) rotate(-8deg); 
    z-index: 2;
}
.card3 {
    height: 200px;
    width: 150px;
    position: absolute;
    top: 47%;
    left: 48%;
    transform: translate(-52%, -53%) rotate(-20deg);
}

.card1:hover {
    transition: transform .4s ease-in-out;
    transform: translate(-47%, -60%) rotate(8deg);
}

.card2:hover {
    transition: transform .4s ease-in-out;
    transform: translate(-49%, -62%)  rotate(-8deg);
}

.card3:hover {
    transition: transform .4s ease-in-out;
    transform: translate(-52%, -63%) rotate(-20deg);  
}

/* Task 2 */
.task2 {
    height: 300px;
    width: 300px;
}

.pink {
    height: 100px;
    width: 100px;
    background-color: pink;
    position: relative;
    top: 10px;
    left: 10px;
    z-index: 1;
}

.blue {
    height: 100px;
    width: 100px;
    background-color: blue;
    position: relative;
    top: -20px;
    left: 70px;
    z-index: 2;
}

.lightgreen {
    height: 100px;
    width: 100px;
    background-color: lightgreen;
    position: relative;
    top: -55px;
    left: 130px;
    z-index: 1;
}

/* Task 3 */
.menu {
    height: 400px;
    width: 200px;
    position: relative;
    transform: translateX(-160px);
    background-color: gray;
}
.menu:hover {
    transition: all .9s linear;
    transform: translateX(0px);
}

.menu:hover #vertical {
    transition: all .9s linear;
    opacity: 0;
}

.menu-list {
    position: relative;
    top: 100px;
}

#vertical {
    font-size: 20px;
    color: white;
    writing-mode: vertical-lr;
    position: relative;
    top: 10px;
    left: 10px;
    float: right;
}

.list-item {
    margin-top: 10px;
    margin-bottom: 10px;
}

.menu a {
    text-decoration: none;
}

.menu-items li {
    list-style: none;
}

.menu-items a {
    color: white;
}

.links:hover {
    transition: all .3s ease-in;
    color: orange;
}


/* Task 4 */
.anim-holder {
    width: 300px;
    height: 300px;
    position: relative;
}

.anim-box {
    width: 100px;
    height: 100px;
    position: absolute;
    top: 0;
    left: 0;
    background: red;
    animation: box 4s linear infinite;
}