* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: hsl(259, 100%, 65%);
    position: relative;
}

#container {
    background: #FFFFFF;
    padding: 32px 32px 42px 32px;
    border-radius: 16px 16px 108px 16px;
}

#age-form {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 100px;
    grid-gap: 24px;
    margin-bottom: 18px;
    position: relative;
}

input, label {
    display: block;
}

label {
    font-weight: 700;
    letter-spacing: 2px;
    font-size: 10px;
    text-transform: uppercase;
    color: hsl(0, 1%, 44%);
    margin-left: 2px;
    margin-bottom: 6px;
}

/* For WebKit browsers (Chrome, Safari) */
input[type="number"]::-webkit-outer-spin-button, input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* For Firefox
input[type="number"] {
    -moz-appearance: textfield;
} */

/* Additional styles to ensure consistent appearance across browsers */
input[type="number"] {
    appearance: textfield;
}

input {
    width: 100px;
    font-size: 20px;
    font-weight: 700;
    padding: 8px 12px;
    border-radius: 4px;
    border: solid 1px;
    border-color: hsl(0, 0%, 86%);
}

input::placeholder {
    color: hsl(0, 0%, 60%);
}

.errors {
    color: hsl(0, 100%, 67%);
    margin-left: 2px;
    font-size: 12px;
    font-style: italic;
    opacity: 0;
    transition: 0.15s;
}

#btnSubmit {
    background-color: hsl(259, 100%, 65%);
    border: none;
    padding: 12px 11px 8px 12px;
    height: 60px;
    width: 60px;
    border-radius: 30px;
    position: absolute;
    right: 0;
    top: 80px;
    cursor: pointer;
    transition: 0.15s;
}

#btnSubmit:hover {
    background-color: rgb(167, 127, 255);
}

img {
    width: 24px;
    height: 22px;
}

hr {
    border: none;
    border-top:1px solid hsl(0, 0%, 86%);
    margin-bottom: 32px;
}

.result {
    font-size: 64px;
    font-style: italic;
    font-weight: 800;
    display: block;
    margin:-20px 0;
}

.values {
    color: hsl(259, 100%, 65%);
}

#overlay {
    position: absolute;
    background-color: rgba(0, 0, 0, 0.525);
    height: 100vh;
    width: 100vw;
    transition: 0.15s;
}

#popUp {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    height: auto;
    width: auto;
    background-color: #FFFFFF;
    border-radius: 16px;
    padding: 24px;
    opacity: 1;
    transition: 0.15s;
}

.disappear {
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
}

#heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

#title {
    display: flex;
    justify-content: left;
    align-items: center;
    gap: 12px;
    width: 300px;
}

h1 {
    font-size: 24px;
}

#btnClose {
    border: none;
    background-color: white;
    height: 32px;
    width: 32px;
    cursor: pointer;
    justify-self: end;
    transition: 0.15s;
    display: flex;
    align-items: center;
    justify-content: right;
}

#btnClose:hover {
    opacity: 0.5;
}

#list {
    margin-top: -12px;
}

#errList {
    list-style-position: inside;
}

@media all and (max-width: 671px) {
    body {
        display: block;
        margin: 0 auto;
        overflow: hidden;
    }

    #container {
        background: #FFFFFF;
        padding: 32px 32px 42px 32px;
        border-radius: 0px;
        height: 100vh;
        display: flex;
        flex-direction: column;
    }

    #btnSubmit {
        left: 50%;
        transform: translateX(-50%);

    }

    input {
        width: 100%;
    }

    #age-form {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        grid-gap: 24px;
        margin-bottom: 18px;    
        position: relative;
    }

    #overlay {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 100;
    }

    #results {
        text-align: center;
        height: 100%;
        margin-top: 100px;
    }


    .result {
        font-size: 2.8em;
    }

    #btnSubmit {
        scale: 80%;
    }

    #title {
        width: 175px;
    }
}