*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
main{
    width: 100%;
    height: 100vh;
    /* background-color:  #3498db; */
    animation: changebg 10s linear infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    color: white;
}
h1 span{
    color: #74b9ff;
}
#sub{
    width: 50px;
    height: 30px;
    border-radius: 10px;
    border: none;
    outline: none;
    background-color: lightgrey;
    color: black;
}
#sub:hover{
      cursor: pointer;
      background-color: gray;
      color: white;
      transition: 1s;
}
@keyframes changebg{
   
    /* 0%{
        background-color: #636e72;
    }
    50%{
        background-color: #34495e;
    }
    100%{
        background-color: #2d3436;
    } */
    0%{
        background-color: #74b9ff;
    }
    25%{
        background-color: #0984e3;
    }
    50%{
        background-color: #00cec9;
    }
    75%{
        background-color: #81ecec;
    }
    100%{
        background-color: #a29bfe;
    }
}
.row1{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 500px;
    height: 100px;
    margin: 10px;
}
.row2{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 500px;
    height: 100px;
    margin: 10px;
}
.row2 h2,h4{
     color: white;
     font-size: 25px;
     font-weight: bold;
}
input{
    border-radius: 10px;
    width: 300px;
    height: 30px;
    text-align: center;
}
#search{
    height: 30px;
    border: none;
    outline: none;
    box-shadow: 0px 0px 5px grey;
}
#search:hover{
 background-color:lightgray;
 transition: 1s;
}