:root {
    --dark-blue: hsl(209, 23%, 22%);
    --very-dark-blue-background: hsl(207, 26%, 17%);
    --very-dark-blue-text: hsl(200, 15%, 8%);
    --dark-gray: hsl(0, 0%, 52%);
    --very-light-gray: hsl(0, 0%, 98%);
    --white: hsl(0, 0%, 100%);
    --black: hsl(0, 0%, 0%);
}

* {
    margin: 0;
    border: none;
    padding: 0;
    max-width: 1440px;
    font-family: 'Nunito Sans', sans-serif;
}

body {
    background-color: var(--very-light-gray);
    color: var(--black);
    font-size: 14px;
}

.header {
    background-color: var(--white);
    display: flex;
    justify-content: space-between;
    box-shadow: 0 1px 5px var(--dark-gray);
}

.header .title {
    margin: 15px 80px;
}

.header .theme_mode {
    text-decoration: none;
    display: flex;
    color: var(--black);
    align-items: center;
    margin-right: 80px;
}

.countries {
    padding: 50px 80px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.countries .countries_header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 50px;
}

.countries .countries_header .countries_header_search {
    padding: 10px 20% 10px 50px;
    background-color: var(--white);
    color: var(--black);
    border-radius: 8px;
    box-shadow: 0 1px 5px var(--dark-gray);
    outline: none;
}

.countries .countries_header .magnifying-glass {
    position: absolute;
    top: 138px;
    left: 100px;
    width: 20px;
}

.countries .countries_header div {
    border-radius: 8px;
    box-sizing: border-box;
    box-shadow: 0px 1px 5px var(--dark-gray);
    width: 210px;
}

.countries .countries_header .countries_header_filter {
    display: flex;
    border-radius: 8px;
    align-items: center;
    cursor: pointer;
    justify-content: space-between;
    padding: 20px 10px 20px 20px;
    background-color: var(--white);
}

.countries .countries_header .countries_header_filter img {
    width: 15px;
    transition: 0.3s;
}

.countries .countries_header .select-menu.active img {
    transform: rotate(-180deg);
}

.countries .countries_header .select-menu .options {
    position: absolute;
    padding: 20px;
    margin-top: 10px;
    border-radius: 8px;
    background-color: var(--white);
    box-sizing: border-box;
    box-shadow: 0px 1px 5px var(--dark-gray);
    width: 210px;
    display: none;
}

.countries .countries_header .select-menu.active .options {
    display: block;
}

.countries .countries_header .select-menu .options .option {
    height: 25px;
    cursor: pointer;
    list-style-type: none;
}

.countries .countries_header .select-menu .options .option:hover {
    background-color: var(--very-light-gray);
}

.hide {
    display: none !important;
}

.countries .countries_header .countries_header_filter option {
    box-shadow: 0 0 3pt 2pt #719ECE;
    border: 1px solid var(--black);
    border-radius: 5px;
}

.countries article {
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    border-radius: 5px;
    padding-bottom: 30px;
    box-shadow: 0 1px 5px var(--dark-gray);
    margin-bottom: 80px;
}

.countries article:last-child {
    margin-right: 52%;
}

.countries article .flag {
    background-color: #aaa;
    /* padding: 70px 135px; */
    width: 265px;
    height: 160px;
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
}

.countries article .country {
    font-size: 16px;
    font-weight: 600;
    padding: 15px 10px;
}

.countries article h3 {
    font-size: 14px;
    font-weight: 600;
    padding: 2px 10px;
}

.countries article h3 span {
    font-weight: 400;
}

/**
 * Style Description Countries
 */
.btn-back {
    margin: 50px 80px;
    padding: 10px 35px 10px 60px;
    border-radius: 5px;
    background-color: var(--white);
    color: var(--black);
    box-shadow: 0 1px 5px var(--dark-gray);
    cursor: pointer;
}

.icons-row-left {
    position: relative;
    top: 10px;
    left: 135px;
    cursor: pointer;
}

.description_country {
    margin: 0 80px 0 80px;
    display: flex;
}

/* .description_country .information {
    display: flex;
} */

.description_country .flag {
    width: 561px;
    height: 400px;
}

.description_country .flag img {
    width: 100%;
    margin: auto;
    display: block;
    box-shadow: 0 1px 5px var(--dark-gray);
}

.description_country .country_information {
    padding-left: 122px;
    line-height: 25px;
}

.description_country .country_information h1 {
    margin-bottom: 40px;
    margin-top: 45px;
}

.description_country .country_information:nth-child(2n) {
    margin-top: 110px;
}

.description_country .information {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
}

.description_country .information .btn_footer_information {
    margin-top: 83px;
    margin-left: 122px;
    flex: 1 100%;
}

.description_country .information .btn_footer_information p {
    display: inline-block;
    font-weight: 700;
    margin-right: 10px;
}

.description_country .information .btn_footer_information span {
    background-color: var(--white);
    color: var(--black);
    box-shadow: 0 1px 5px var(--dark-gray);
    padding: 5px 20px;
    margin: 0 3px;
    border-radius: 5px;
}

@media (max-width: 450px) {
    .header .title {
        margin: 45px 20px;
        font-size: 1.4em;
    }

    .header .theme_mode {
        margin-right: 20px;
    }

    .countries {
        padding: 30px 20px 38px 20px;
    }

    .countries .countries_header {
        flex-wrap: wrap;
    }

    .countries article {
        margin-left: 44px;
        margin-right: 44px;
        width: 100%;
    }

    .countries .countries_header .countries_header_search {
        width: 100%;
        margin-bottom: 50px;
        padding-top: 21px;
        padding-bottom: 21px;
    }

    .countries .countries_header .magnifying-glass {
        top: 165px;
        left: 45px;
    }

    .countries .countries_header div {
        width: 248px;
    }

    .countries .countries_header .select-menu .options {
        width: 248px;
    }

    .countries article .flag {
        width: 100%;
    }

    /* page detail */
    .btn-back {
        margin: 50px 2px;
    }

    .icons-row-left {
        left: 60px;
    }

    .description_country {
        flex-wrap: wrap;
        margin: 0 35px;
        margin-bottom: 70px;
    }

    .description_country .flag {
        width: 384px;
        height: 275px;
    }

    .description_country .information {
        flex-direction: column;
    }

    .description_country .country_information {
        padding-left: 0;
    }

    .description_country .information .btn_footer_information {
        flex: none;
        margin-left: 0;
        margin-top: 55px;
        width: 100%;
        display: flex;
        flex-wrap: wrap;
    }

    .description_country .country_information h1 {
        margin: 55px 0 35px 0;
    }

    .description_country .country_information:nth-child(2n) {
        margin-top: 55px;
    }

    .description_country .information .btn_footer_information p {
        padding-bottom: 25px;
        width: 100%;
    }

    .description_country .information .btn_footer_information span {
        width: 20px;
        margin: 10px;
        margin-left: 0;
    }
}