:root {--theme-1: rgb(196, 5, 129)}
* {
    padding: 0;
    margin: 0;
}
html {
    background-color: rgb(64, 73, 198);
}
body {
    background-color: rgb(243, 251, 250);
    font-size: 100%;
    width: 100%;
    max-width: 800px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin: 0 auto;
}
header img {
    width: 100%;
}
#nav_menu ul {
    display: flex;
    flex-basis: 100%;
    justify-content: space-around;
    margin: 0;
    padding: 0;
	list-style-type: none;
	position: relative;
    background-color: rgb(85, 9, 9);
}
#nav_menu ul li a{
    font-size: small;
    display: block;
    text-align: center;
    padding: 1.75em 0;
    margin: .5px;
    text-decoration: none;
    background-color: var(--theme-1);
    color: white;
    font-weight: bold;
    border-radius: 100px;
    position: relative;
}
#nav_menu ul li { 
    flex-basis: 20%;
}
#nav_menu ul ul {
    width: 20%;
	display: none;
	position: absolute;
	top: 100%;
}
#nav_menu ul li:hover > ul { display: block; }
#nav_menu > ul::after {
	content: "";
	display: block;
}
#nav_menu a.current {
    color: greenyellow;
}
#nav_menu ul li a:hover, #nav_menu ul li a:focus {
    color: #ffd103;
    font-style: italic;
}
main {
    margin-top: 2em;
}
main img {
    float: left;
    height: 80px;
    margin-right: 1.5em;
    border: 1px solid var(--theme-1);
}
section ul {
    list-style-type: none;
    padding: 1em;
    float: left;
}
section ul li {
    padding: 1em 0;
    width: 125px;
}
a:link {
    text-decoration: none;
}
a:hover, a:focus {
    font-style: italic;
}
div {
    margin: 0 1em 4em 12em;
}
.class_time {
    font-weight: normal;
    font-size: medium;
    font-style: italic;
    margin: 1.5em;
}
.explain {
    margin: 3em 0 -2em 0;
    text-indent: 30px;
}
main hr {
    border: 1px solid var(--theme-1);
    margin: 0 1em 1em 12em;
}

footer p {
    text-align: center;
    color:white;
    background-color: var(--theme-1);
    padding: 1em 0em;
}
@media (max-width: 730px) {
    #nav_menu ul li a {
        font-size: 70%;
    }
}
@media (max-width: 615px) {
    #nav_menu ul li a {
        font-size: 8px;
    }
    section {
        display: none;
    }
    main {
        display: flex;
        flex-direction: column;
    }
    div {
        margin: 0 2em 4em;
    }
    main hr {
        margin-left: 1em;
    }
}
@media (max-width: 430px) {
    * {
        font-size: 96%;
    }
    .class_time {
        margin: .5em;
    }
    #mobile_menu div {
        margin: 0;
    }
    div h2 {
        padding-top: 1em;
    }
}