:root{
    --veryLightGray : hsl(0, 0%, 98%);
}
*{
    margin: 0;
    padding: 0;
}
html[data-theme='light']{
    --bgColor : hsl(0, 0%, 98%);
    --headerColor: white;
    --textColor: black;
    --shadowColor: #dfdede;
}
html[data-theme='dark']{
    --bgColor :  hsl(207, 26%, 17%);
    --headerColor: hsl(209, 23%, 22%);
    --textColor: white;
    --shadowColor: #0e0e0e;
}
body{
    font-family: 'Nunito Sans', sans-serif;
    background-color: var(--bgColor);
    color: var(--textColor);
    transition: 0.2s;
}
.header{
    position : sticky;
    height: 1em;
    display: flex;
    padding: 2em;
    align-items: center;
    justify-content:space-between;
    background-color: var(--headerColor);
    box-shadow: 10px 10px 10px -5px var(--shadowColor);
}
.theme-box{
    display: flex;
    align-items: center;
    transition: 0.5s;
}
.theme-box:hover{
    cursor: pointer;
}
.theme-box p{
    margin-left: 0.5em;
    font-weight: 600;
}
.main{
    position: relative;
}
.input-form{
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.input-form select{
    margin-right: 3em;
    margin-top: 3em;
    padding: 1em;
    border: 0px;
    box-shadow: 10px 10px 10px -5px var(--shadowColor);
    color: var(--textColor);
    background-color: var(--headerColor);
    font-family: 'Nunito Sans', sans-serif;
}
.input-form select:focus, .input-form input:focus{
    outline: none;
}
.input-form input{
    margin-top: 3em;
    margin-left: 3em;
    padding: 1em 10em 1em 1em;
    border: 0px;
    background-color: var(--headerColor);
    color: var(--textColor);
    box-shadow: 10px 10px 10px -5px var(--shadowColor);
    font-family: 'Nunito Sans', sans-serif;
}
::placeholder{
    color: var(--textColor);
}
.flag{
    width: 18rem;
    height: 12rem;
    border-top-left-radius: 0.5rem;
    border-top-right-radius: 0.5rem;
}

.countries-box{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    margin-top: 3rem;
    margin-bottom: 3rem;
    gap: 3rem;    
}

.country-item{
    width: 18rem;
    background-color: var(--header-color);
    border-radius: 0.5rem;
    box-shadow: 10px 10px 10px -5px var(--shadowColor);
    color: var(--textColor);
}

.country-item:hover{
    cursor: pointer;
}

.country-item h3{
    padding: 1rem;
}

.country-item ul{
    list-style-type: none;
    padding: 1rem;
}

.details-grid{
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-top: 3em;
}

.text-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.2em;
    padding: 2em;
}

.text-grid > h3{
    grid-column: 1/5;
}

.text-grid > .stats {
    background-color: rgb(79, 152, 216);
    list-style: none;
    grid-column: 1/5;
    height: 200px;
}

.text-grid > .border-countries-box{
    grid-column: 0.5;
}

.text-grid > p:nth-child(even) {
    grid-column: 1/3;
}

.text-grid > p:nth-child(odd) {
    grid-column: 3/5;
}

.text-grid > p{
    font-weight: bold;
}

.text-grid > p > span{
    font-weight:normal;
}

.details-flag{
    align-self: center;
    justify-self: center;
}

.details-flag > img {
    width: 30rem;
}

.neighboring-countries{
    grid-column: 2/3;
}

.neighboring-countries{
    list-style: none;
    display: contents;
    gap: 1em;
}

.border-countries-box{
    font-weight: bold;
    margin-top: 1em;
}

.neighboring-countries > li {
    border: 2px solid #efefef;
    border-radius: 2px;
    padding: 0.25em 1em;
    align-self: center;
}

.neighboring-countries > li:hover {
    cursor: pointer;
}

.details-section{
    display: none;
}

.back-btn{
    padding: 1em 4em;
    margin: 1.5em;
    border: 0px;
    background-color: var(--header-color);
    color: var(--textColor);
    box-shadow: 10px 10px 10px -5px var(--shadowColor);
}

@media screen and (max-width:700px){
    .details-flag{
        grid-column: 1/3;
    }
    .text-grid > p:nth-child(even) {
        grid-column: 1/5;
    }    
    .text-grid > p:nth-child(odd) {
        grid-column: 1/5;
    }
    .text-grid{
        gap: 1em;
    }
    .neighboring-countries > li {
        padding: 0.25em;
    }

    .header h2{
        font-size: 1.25em;
    }

    .details-flag > img {
        width: 20rem;
    }

    .input-form{
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .input-form input{
        margin-left: 0;
        padding: 1em;
    }

    .input-form select{
        margin-right: 0;
    }

    ::placeholder{
        text-align: center;
    }

    .neighboring-countries {
        list-style: none;
        display: grid;
        gap: 1em;
        grid-template-columns: 1fr 1fr;
    }
}