body {
    background-image: url("img/bg-img-home.jpg");
    background-size: 100vw;
    background-position: 0 38px;
    background-repeat: no-repeat;
    background-attachment: fixed;
}
.bgimg{
    width: 100%;
    aspect-ratio: 2560 / 1707;
    max-height: 70vh;
}

.big{
    max-width: 1500px;
    margin: auto;
}
.top{
    background-color: rgb(230, 223, 214);
    padding-bottom: 20px;
    min-height: calc(30vh - 38px);
}
.w3-ul li{
    padding: 5px;
    border-bottom:1px solid rgba(0, 0, 0, 0.2)
}

.first{
    width: 100%;
    transition: ease 2s;
}
@keyframes second {
    0% { width: 50%;}
    66.66% { width: 0%;}
    100% { width: 100%;}
}
.second {
    width: 100%;
    animation: second 3s
}

@media screen and (max-width: 600px) {
    .second {
        width: 100%;
        animation: initial
    }
    .first{
        width: 100%;
        transition: initial
    }
    .correct{
        transition: ease 2s;
    }
    .incorrect {
        transition: ease 2s;
    }
    iframe{
        width: 100%!important;
    }
}

.correct{
    color: white;
    background-color: #4CAF50
}
.incorrect{
    background-color: #f44336;
    color: white;
}

#body * a {
    position: relative;
    text-decoration: none;
}
  
#body * a::before {
    content: "";
    position: absolute;
    width: 100%;
    height: 3px;
    bottom: -2px;
    background-color: rgba(0, 0, 0, 0.7);
    border-radius: 2px;
    transition: ease 1s;
}
  
#body * a:hover::before {
    width: 0%;
    background-color: transparent;
}
iframe{
    margin: auto;
    margin-bottom: 25px;
    display: block;
    width: 600px;
    aspect-ratio: 560/315;
}