style.css

*,*::before,*::after{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body{
    font-family: 'Times New Roman', Times, serif;
    font-size: 62.5%;
    background-image: linear-gradient(to right, #141e30, #243b55);
    color: white;
    /* border: 2px solid red; */
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}


.container{
    /* border: 2px solid red; */
    max-width: 1000px;
    width: 90%;
    background: #243b55;
    box-shadow: rgba(0, 0, 0, 0.09) 0px 2px 1px, rgba(0, 0, 0, 0.09) 0px 4px 2px, rgba(0, 0, 0, 0.09) 0px 8px 4px, rgba(0, 0, 0, 0.09) 0px 16px 8px, rgba(0, 0, 0, 0.09) 0px 32px 16px;
}

.container header{
    font-size: 1.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    background: white;
    color: #243b55;
    padding: 0.4em;
    box-shadow: rgba(50, 50, 93, 0.25) 0px 2px 5px -1px, rgba(0, 0, 0, 0.3) 0px 1px 3px -1px;
    margin-bottom: 2rem;
}

.center{
    /* border: 2px solid red; */
    font-size: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
}

section{
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    font-size: 1rem;
    justify-content: space-between;
    padding: 1.5em;
}

section .left{
    flex-basis: 50%;
    display: flex;
    flex-direction: column;
    /* border: 2px solid red; */
    gap: 1.5rem;
}

.common{
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    /* border: 2px solid red; */
}

.common h3{
    font-size: 1.5rem;
}

.common .change{
    display: flex;
    gap: 0.5rem;
    font-size: 1.5rem;
}

.common .special{
    font-size: 1.5rem;
}

input{
    /* border: 2px solid red; */
    width: 80%;
    height: 4px;
}

.calculate{
    font-size: 1.2rem;
    padding: 0.7em 1.5em;
    border-radius: 5px;
    outline: none;
    border: 2px solid grey;
    background: transparent;
    color: white;
    cursor: pointer;
}
.calculate:hover{
    background:#141e30;
}

section .right{
    flex-basis: 40%;
    /* border: 2px solid red; */
    display: flex;
    flex-direction: column;
    margin: auto;
    text-align: center;
    box-shadow: rgba(0, 0, 0, 0.3) 0px 19px 38px, rgba(0, 0, 0, 0.22) 0px 15px 12px;
    padding: 2em;
}

section .flex{
    display: flex;
    gap: 1rem;
    justify-content: center;
    font-size: 1rem;
}

.hello{
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    /* border: 2px solid red; */
}

.price-active{
    margin-bottom: 1rem;
}

.dollar-special sup{
    font-size: 1.5rem;
}
.price-active .price-special{
    font-size: 4rem;
}

.zero{
    font-size: 1.5rem;
}

@media screen and (max-width:1068px){
    .section .right{
        flex-basis: 60%;
    }
    .section .left{
        flex-basis: 50%;
    }
    .dollar-special sup{
        font-size: 1rem;
    }
    .price-active .price-special{
        font-size: 2rem;
    }
    
    .zero{
        font-size: 1rem;
    }
    body{
        height: auto;
        margin: 1rem 0;
    }
}

@media screen and (max-width:768px){
    section{
        flex-direction: column;
        gap: 4rem;
    }
    section .right{
        width: 100%;
        /* border: 2px solid red; */
    }
    input{
        width: 100%;
    }
    .main-heading{
        font-size: 1.2rem;
        text-align: center;
    }
    .header-heading{
        font-size: 1.5rem;
        text-align: center;
    }
    .paragraph{
        text-align: center;
    }
}

@media screen and (max-width:468px){
    .center{
        padding:0 1em;
    }
    .common h3{
        font-size: 1.1rem;
    }
    .right h2{
        font-size: 1.1rem;
    }
    section .right{
        padding: 1em;
    } 
}