*{
    margin: 0;
    padding: 0;
    font-family: 'Courier New', Courier, monospace;
    box-sizing: border-box;
}

.container{
width: 100%;
min-height: 100vh;
background: linear-gradient(135deg,#4203a9,#90bafc);
color: #fff;
padding: 10px;
}

.calculator{
width: 100%;
max-width: 600px;
margin-left:10% ;
margin-top:10% ;
align-content: center;
}

.calculator h1{
font-size: 60px;
}

.calculator h1 span{
color: #ffff76;
}

.input-container{
margin: 40Px 0;
padding: 35px;
border-radius: 10px;
background-color: rgba(255,255,255,0.3);
display: flex;
align-items: center;
/* justify-content: space-between; */
width: 80%;
align-content: center;
}

.input-container input{
flex: 1;
margin-right: 20px;
padding: 14px 20px;
border: 0;
outline: 0;
font-size: 18px;
border-radius: 5px;
position: relative;
}

.input-container  button{
background: #ffff76;
border: 0;
outline: 0;
padding: 15px 30px;
border-radius: 5px;
font-weight: 500;
color: #333;
cursor: pointer;
}

.input-container input::-webkit-calendar-picker-indicator{
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    height: auto;
    position: absolute;
    background-position: calc(100% - 10px);
    background-size: 30px;
    cursor: pointer;
}

#result{
font-size: 20px;
}

#result span{
color: #12ed7c;
font-weight: 700;
}

@media (max-width: 768px) {
    .calculator h1 {
        font-size: 40px;
    }

    .input-container {
        flex-direction: column;
        align-items: stretch;
        padding: 25px;
    }

    .input-container input,
    .input-container button {
        width: 100%;
        margin: 10px 0;
        font-size: 16px;
    }

    #result {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .calculator h1 {
        font-size: 30px;
    }

    .input-container {
        padding: 20px;
    }

    .input-container input {
        font-size: 16px;
    }

    .input-container button {
        padding: 12px 20px;
        font-size: 15px;
    }

    #result {
        font-size: 16px;
    }
}