*{
    margin: 0;
    padding: 0;
    font-family: 'poppins', sans-serif;
    box-sizing: border-box;
}
.container{
width: 100%;
min-height: 100vh;
background: linear-gradient(135deg, #4203a9,#90bafc);
color: #fff;
padding: 10px;
}
.calc{
width: 100%;
max-width: 600px;
margin-left: 10%;
margin-top: 10%;
}
.calc h1{
font-size: 60px;
}
.input-box{
margin: 40px 0;
padding: 35px;
border-radius: 10px;
background: #90bafc;
display: flex;
align-items: center;
}
.input-box input{
flex: 1;
margin-right: 20px;
padding: 14px 20px;
border: 0;
outline: 0;
font-size: 18px;
border-radius: 5px;
position: relative;
}
.input-box button{
background: #ffff76;
border: 0;
outline: 0;
padding: 15px 30px;
border-radius: 5px;
font-weight: 500;
color: #333;
cursor: pointer;
}