*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.container{
    background: linear-gradient(135deg, #714baf, #7791be);
    width: 100%;
    min-height: 100vh;
    padding: 10px;
}
.box-container{
    padding: 20px;
    margin-left: 10%;
    margin-top: 10%;
    width: 100%;
    max-width: 600px;
}
.input-box{
    display: flex;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.021);
    border: 1px solid;
    padding: 30px;
    margin: 40px 0;
}
h2{
    font-size: 40px;
    font-weight: bold;
    color: #110e0c;
}
h3{
    font-size: 18px;
    margin-bottom: 22px;
    margin-right: 5rem;
}
.input-box input{
    flex: 1;
    padding: 16px 20px;
    margin-right: 15px;
    font-size: 16px;
    border: 0;
    position: relative;
    border-radius: 0.5rem;
    background-color: whitesmoke;
}
.input-box button{
    padding: 16px 20px;
    font-size: 18px;
    font-weight: 700;
    border-radius: 0.5rem;
    border: 0;
    position: relative;
    background-color: whitesmoke;
}
.input-box button:hover{
    background: #714baf;
    cursor: pointer;
}
#ageResult{
    font-size: 18px;
    color: #000;
    margin-left: 10px;
}

@media screen and (max-width: 640px){
    .box-container{
        padding: 20px;
        margin-left: 8%;
        margin-top: 10%;
        width: 100%;
        max-width: 400px;
    }
    .input-box{
        display: flex;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.021);
        border: 1px solid;
        padding: 20px;
        margin: 30px 0;
    }
    .input-box input{
        flex: 1;
        padding: 12px 16px;
        margin-right: 10px;
        font-size: 14px;
    }
    .input-box button{
        padding: 12px 16px;
        font-size: 14px;
        font-weight: 700;
    }
    #ageResult{
    font-size: 16px;
    font-weight: 500;
}
}

@media screen and (max-width: 470px){
    .box-container{
        padding: 15px;
        margin-left: 5%;
        margin-top: 10%;
        width: 100%;
        max-width: 350px;
    }
    .input-box{
        padding: 18px;
        margin: 28px 0;
    }
    .input-box input{
        flex: 1;
        padding: 12px 16px;
        margin-right: 10px;
        font-size: 15px;
    }
    .input-box button{
        padding: 12px 16px;
        font-size: 15px;
        font-weight: 700;
    }
    h2{
        font-size: 35px;
    }
    h3{
        font-size: 16px;
    }

    #ageResult{
    font-size: 16px;
    font-weight: 500;
}
}