div {
    height: 1200px;
    background-image: url("https://pbs.twimg.com/media/GBpehjMXYAAyBYg?format=jpg&name=large");
    background-size: 100% 100%;
}

.p {
    width: 750px;
    height: 260px;
    border-radius: 10px;
    background-color: lightblue;
    padding: 10px 10px;
    position: relative;
    /* bottom: 850px; */
    top: 50px;
    left: 380px;
    font-size: 20px;
    transition-duration: 1s;
    text-align: center;
}

.p:hover {
    box-shadow: 1px 1px 10px 10px red;
    color: red;
    text-shadow: 1px 1px 10px blue;
}

/* body {
    overflow: hidden;
} */

.a {
    width: 150px;
    height: 100px;
    background-color: chartreuse;
    border: 1px solid blue;
    position: relative;
    /* bottom: 800px; */
    top: 70px;
    left: 670px;
    color: black;
    z-index: 100;
    font-weight: 700;
    text-align: center;
    transition-duration: 1s;
}

.a:hover {
    box-shadow: 1px 1px 10px 5px blue;
    color: red;
}