.nav {
    border-bottom: 1px solid black;
    background: #fff;
}

.nav .main-list li a {
    color: black
}

.main {
    margin-top: 150px;
}

.main h1 {
    font-size: 33px;
}

.text-article {
    margin-top: 35px;
}

.text-article p{
    letter-spacing: 0.2px;
    word-spacing: 1px;
    margin-top: 20px;
}

.text-article iframe {
    width: 80%;
    display: block;
    margin: 0 auto;
    height: 450px;
}

.text-article h4 {
    text-align: center;
    margin-top: 5px;
}

.text-article h6 {
    font-size: 20px;
}

h4.text-footer {
    margin-top: 15px;
    margin-bottom: 25px;
}


@media screen and (max-width: 768px) {
    .text-article iframe {
        width: 95%;
        height: 250px;
    }

    .main {
        margin-top: 85px;
    }

    .main h1 {
        font-size: 25px;
    }

    .main a {
        width: 100%;
    }
}