* {
    margin: 0;
    padding: 0;
}
body {
    font-size: 24px;
    color: #fff;
    height: 100vh;
    text-align: center;
}

a {
    color: #fff;
    text-decoration: none;
}

.header {
    background-color: #343a40!important;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.main {
    width: auto;
}
.main_container {
    display: flex;
    flex: 1;
    width: auto;
}

.nav {
    background-color: salmon;
    padding-top: 3rem;
    flex: 0 0 220px;
}

.nav h4 {
    text-decoration: underline;
}

.nav ul li {
    font-size: 14px;
    list-style: none;
    padding: 4px;
    margin-left:10px;
    text-align:left;
}

.nav ul li a:hover{
    background-color: #555;
    color: aliceblue;
}


.poster {
    background-color: #e99090;
    padding-top: 3rem;
    flex: 3 3;
}

.poster img {
    width: 660px;
    margin-top: -80px;
}

.poster .desc {
    margin-top: -50px;
    margin-bottom: 40px;
}

.article {
    background-color: #e99090;
    padding-top: 3rem;
    flex: 1 1;
    justify-items: center;
    align-content: center;
}

.aside {
    background-color: #b95f21;
    padding-top: 3rem;
    flex: 1 1 5rem;
}

.article table {
    border-collapse: collapse;
    border: 2px solid #3e3a3a;
    margin: 20px 30px;
    padding: 20px;
}

.table_odd {
    background-color: ghostwhite;
    color: #555;

}

.table_even {
    background-color: whitesmoke;
    color: #333;
}

.article th, td{
    border-collapse: collapse;
    border: 1px solid #3e3a3a;
}

.article .table_head th { 
    width: 310px;
    height: 40px;
    padding: 8px 8px;
    font-size: 22px;
    font-weight: 600;
    text-align: center;
}


.article .table_body td {
    height: 30px;
    text-align:left;
    padding: 20px;
    font-size: 18px;
    font-weight: 400;
    line-height: 1.15;
}

.note {
    margin: 10px;
    padding: 10px;
    text-align: left;
    font-size: 16px;
}

.article_example {
    background-color: #bb4646;
    padding-top: 3rem;
}

.article_example h3 {
    margin-bottom: -80px;
    text-decoration:underline
}

.article_example img {
    width: 620px;
    margin-bottom: -80px;
}

.article_example p {
    font-size: 22px;
}

.article_example span {
    font-size: 18px;
}

.article_example li {
    border: 2px solid #333;
    border-radius: 20px;
    width: 440px;
    justify-items: center;
    align-content: center;
    margin-left: auto;
    margin-right: auto;
    list-style: none;
    background-color: #333;
    color: #333;
    margin-bottom: 2px;
}

.article_example li:hover {
    background-color: #fff;
}

.article_example li li::after{
    content: '';
    border-bottom: 1px solid #333;
  
}

.footer {
    background-color: #343a40!important;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

@media all and (max-width: 959px) {
    .main {
        flex-direction: column;
    }
}

@media all and (max-width: 640px) {
    body {
        font-size: 18px;
    }
    .main_container {
        flex-direction: column;
    }

    .article_example img {
        width: 420px;
    }
}