*{
    margin: 0;
    padding: 0;
    font-family: 'poppins',sans-serif;
    box-sizing: border-box;
}
.container{
    width: 100%;
    min-height: 100vh;
    background:linear-gradient(135deg,#2f2b8c,#08a5cc);
    color: white;
    padding: 10px;
}
.calculator{
    width: 100%;
    max-width: 600px;
    margin-left: 10%;
    margin-top: 10%;
}
.calculator h1{
    font-size: 60px;
}
.calculator h1 span{
    color: tomato;
}
.input-box{
    margin: 40px 0;
    padding: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, .3);
}

.input-box input{
    margin: 20px;
    padding:15px 20px;
    border-radius: 5px;
    outline: 0;
    border: 0;
    flex: 1;
    position: relative;
    font-size: 19px;
}

.input-box button{
border: 0;
outline: 0;
padding: 15px 20px;
border-radius: 5px;
font-weight: 500;
color: #333;
cursor: pointer;
background: #ffff76;
}
.input-box input::-webkit-calendar-picker-indicator{
top: 0;
left: 0;
right: 0;
bottom: 0;
background-size: 30px;
position: absolute;
height: auto;
width: auto;
cursor:pointer;
background-position:calc(100% - 10px);
}
#result{
    font-size: 20px;
}

#result span{
    color: yellow;
    font-style: italic;
}