invisio v2.0

@font-face {
    font-family: myFirstFont;
    src: url(../font/thaisanslite_r1.otf);
    font-weight: bold;
}

body {
    height: 100%;
    margin: 0;
    padding: 0;

font-family: "Noto Sans Thai", sans-serif;
    font-optical-sizing: auto;
    font-weight: bold;
    font-style: normal;
    font-variation-settings:
        "wdth" 100;

}

.top-div {
    position: fixed;
    width: 100%;
    z-index: 1;
}

.topbar {
    left: 0;
    top: 0;
    width: 100%;
    height: 30px;
    background-color: #0c71c3;
    color: #FFFF;
    padding: 5px;
    padding-left: 10%;
    text-align: left;
    font-size: small;
    margin: 0;
}

.banner {
    margin-top: 0;
    width: 100%;
    background-color: #FFFF;
}

.banner img {
    margin: auto;
    width: 40%;
    height: auto;
    display: block;
    transition: 0.5s;
}

.nav-con {
    width: 100%;
    display: flex;
    justify-content: center;
    background-color: #FFFF;
}

.menu {
    display: flex;
}

.menu li {
    margin-top: 1rem;
    list-style: none;
    display: flex;
    align-items: center;
}

.menu li a {
    margin-left: 1rem;
    padding: 5px 5px;
    color: black;
    text-decoration: none;
}

.register_a {
    padding: 10px 15px;
    color: white;
    background-color: #0c71c3;
    border-radius: 20px;
}

.footer {
    left: 0;
    bottom: 0;
    width: 100%;
    height: 50px;
    background-color: #1f1f1f;
    color: #666;
    padding: 15px;
    padding-left: 10%;
    text-align: left;
    font-size: 10pt;
}

#myBtn {
    position: fixed;
    bottom: 110px;
    z-index: 99;
    font-size: 10px;
    border: none;
    outline: none;
    background-color: rgb(0, 0, 0);
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 10px 0px 0px 10px;
    opacity: 50%;
    transition: 1s;
    right: 0;

}

.content-baner {
    position: relative;
    width: 100%;
    height: 450px;
    background-image: url('../image/content_baner.jpg');
    background-size: cover;
}

.text-baner {
    position: absolute;
    bottom: 15%;
    left: 10%;
}

.text-baner h3 {
    color: goldenrod;
}

.text-baner h5 {
    color: #fff;
}

.content-present {
    display: flex;
    padding-left: 5rem;
    padding-right: 5rem;
}

.content-present-text {
    display: flex;
    margin: 0;
    border-radius: 20px;
}

.conten-box {
    padding: 30px;
    border-radius: 30px;
    margin: 1rem;
}

.conten-box span {
    color: #666666;
}

.main-content-index {
    background-color: #b3e1fd;
    padding-top: 5%;
    padding-left: 10%;
    padding-right: 10%;
}

.main-content {
    padding-top: 5%;
    padding-left: 12%;
    padding-right: 12%;
}

.conten-box h4 {
    color: #0c71c3;
}

@media only screen and (min-width: 981px) {
    .banner img {
        max-height: 100%;
    }
}

@media (max-width: 980px) {
    .banner img {
        max-height: 100%;
    }

}