@import url("https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap");
@import url("https://cdn.jsdelivr.net/gh/hung1001/font-awesome-pro@4cac1a6/css/all.css");

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

body {
    background-image: url("../img/index_wallpaper.gif");
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: fixed;
}

main {
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    width: 100%;
    height: 100%;
}

main > nav {
    margin-left: 1rem;
    width: 20%;
    height: 100%;
    background-color: #3e3e3ee6;
}

main > nav > img {
    width: 70%;
    margin-left: 15%;
    margin-top: 3%;
    margin-bottom: 10px;
}

details > article {
    margin-left: 20px;
    margin-right: 20px;
    margin-top: 5px;
    background-color: #343434;
    padding: 7px 7px 7px 7px;
    color: #ffffff;
    box-shadow: rgba(0, 0, 0, 0.5) 0px 3px 8px;
}

details > summary {
    text-align: center;
    list-style: none;
}

button.nav {
    position: relative;
    width: 100%;
    height: 40px;
    border: none;
    font-size: large;
    text-align: left;
    padding: 13px 13px 13px 13px;
    margin-bottom: 10px;
    background-color: transparent;
}

button.nav > i {
    position: relative;
    width: 35px;
    height: 35px;
    margin-left: 8px;
    text-align: center;
    padding-top: 0.67rem;
    border-radius: 10px;
    vertical-align: middle;
    background-color: gray;
}

button.nav > span {
    margin-left: 12px;
    color: #ffffff;
}

fieldset {
    font-size: small;
    border: none;
}

fieldset > legend {
    font-weight: bolder;
    margin-bottom: 5px;
}

input[type=radio] {
    accent-color: #12865c;
}

button.classic {
    width: 96%;
    height: 30px;
    margin-left: 2%;
    margin-top: 5px;
    border: none;
    color: #ffffff;
    border-radius: 5px;
    background-color: #39aa6d;
}