*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}
.container{
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(135deg, #4203a9, #30bafc);
    padding: 10px;
    background-position: center;
}
.calculator{
    width: 100%;
    max-width: 600px;
    margin-left: 10%;
    margin-top: 10%;
}
.calculator h1{
    font-size: 60px;
    color: #c0c0c0;
}
.calculator h1 span{
    color: #ffd700;
}
.input-box{
    margin: 40px 0;
    padding: 35px;
    border-radius: 10px;
    background: rgba(225,255,255,0.3);
    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: #333333;
    border: 0;
    outline: 0;
    padding: 15px 30px;
    border-radius: 5px;
    font-weight: 500;
}
.input-box button span{
    color: white;
}
.input-box input::-webkit-calendar-picker-indicator{
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    width: auto;
    height: auto;
    position: absolute;
    background-position: calc(100% - 10px);
    background-size: 30px;
    cursor: pointer;
}
#age {
    font-family: Arial, sans-serif;
    font-size: 18px;
    color: #fff;
    margin-top: 10px;
    font-weight: bolder;
    border-radius: 5px;
    background: #333333;
    border: 1px;
    outline: 0px;
}
/* Media Queries */

/* Small devices (landscape phones, less than 768px) */
@media (max-width: 768px) {
    .calculator {
        margin-left: 5%;
        margin-top: 5%;
    }
    .calculator h1 {
        font-size: 40px;
    }
    .input-box {
        flex-direction: column;
        padding: 20px;
    }
    .input-box input {
        margin-right: 0;
        margin-bottom: 20px;
        padding: 10px 15px;
    }
    .input-box button {
        padding: 12px 25px;
    }
}

/* Medium devices (tablets, less than 992px) */
@media (max-width: 992px) {
    .calculator {
        margin-left: 7.5%;
        margin-top: 7.5%;
    }
    .calculator h1 {
        font-size: 50px;
    }
    .input-box {
        padding: 30px;
    }
    .input-box input {
        padding: 12px 18px;
    }
    .input-box button {
        padding: 14px 28px;
    }
}

/* Large devices (desktops, less than 1200px) */
@media (max-width: 1200px) {
    .calculator {
        margin-left: 8%;
        margin-top: 8%;
    }
    .calculator h1 {
        font-size: 55px;
    }
    .input-box {
        padding: 32px;
    }
    .input-box input {
        padding: 13px 19px;
    }
    .input-box button {
        padding: 15px 29px;
    }
}
#devName {
    margin-top: 25%;
    color: antiquewhite;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-style: italic;
}