body {
    max-width: 99vw;
}

.container-fluid {
    margin-top: -19px;
    margin-left: -15px;
    padding-right: 30px;
}

.container-fluid .course_picture {
    height: 100%;
    width: 100%;
}

.container-fluid .btn-primary {
    float: right;
    margin-top: -48px;
}

.container-fluid .btn-danger {
    float: right;
    margin-top: -48px;
}

hr {
    margin-top: unset !important;
    margin-bottom: 20px;
    border: 0;
    border-top: 1px solid black;
}

#Quizname {
    font-size: 16px;
    padding-left: 16px;
}

/* Sidebar */
.cd-nav-item.cd-nav-dropdown {
    width: 280px;
    background-color: #f0f0f0;
    position: fixed;
    overflow-y: auto;
    overflow-x: hidden;
    height: auto;
    bottom: 0;
    left: 0;
    top: 50px;
    padding: 20px 0 0;
    z-index: 1;
    border-right: 1px solid #c8d2dc;
}

.cd-nav-item {
    -ms-flex: 1;
    flex: 1;
}

/*.cd-sidebar-nav .cd-nav-item {
    display:-ms-flexbox;
    display:flex;
    -ms-flex-align:center;
    align-items:center;
    height:48px;
    font-family:barlow,sans-serif;
    font-size:18px;
    font-weight:400;
    line-height:22px;
    color:#3c4b64;
    text-decoration:none;
}*/

.cd-sidebar-nav .cd-nav-dropdown-items {
    margin: 0;
    overflow-y: hidden;
    list-style: none;
    transition: max-height .25s ease-in-out;
}

#sidebar>.cd-sidebar-nav a {
    display: block;
    color: black;
    padding: 16px;
    text-decoration: none;
}

#sidebar>.cd-sidebar-nav a.active {
    background-color: #4CAF50;
    color: white;
}

#sidebar>.cd-sidebar-nav a:hover:not(.active) {
    background-color: #555;
    color: white;
}

.chapter {
    left: 280px;
    height: auto;
    position: absolute;
    background: #fff;
    width: calc(100% - 280px);
    top: 65px;
}

#video {
    text-align: center;
}

.subchapter {
    left: 280px;
    height: auto;
    position: absolute;
    background: #fff;
    width: calc(100% - 280px);
    top: 65px;
}

.course {
    left: 294px;
    height: auto;
    position: absolute;
    background: #fff;
    width: calc(100% - 294px);
    top: 65px;
}

#title {
    /*left:20px;*/
    position: absolute;
    width: calc(100% - 20px);
    padding: 10px 20px 20px 0px;
}

.previous {
    background-color: #f1f1f1;
    color: black;
}

.next {
    background-color: #4CAF50;
    color: white;
}

#nextprev a {
    text-decoration: none;
    display: inline-block;
    padding: 8px 16px;
}

#nextprev a:hover {
    background-color: #ddd;
    color: black;
}

#nextprev {
    text-align: center;
}

#w2-warning-0 {
    height: 100px;
}

iframe {
    width: 90%;
    height: 500px;
}

#w2-warning-0 {
    height: auto;
    position: relative;
    width: calc(100% - 280px);
    float: right;
    z-index: 1;
}

#btnNav {
    position: fixed;
    top: 10px;
    left: 13px;
    z-index: 1031;
    height: var(--header-height);
    background: #022C46;
    color: #fff;
    display: flex;
    outline: none;
    border: none;
}

.sidebar .mobile {
    transform: translateX(0);
}

#w2-success-0 {
    height: auto;
    position: relative;
    width: calc(100% - 280px);
    float: right;
    z-index: 1;
}

@media(max-width: 848px) {
    .cd-nav-item.cd-nav-dropdown {
        width: 280px;
        background-color: #f0f0f0;
        position: fixed;
        overflow-y: auto;
        overflow-x: hidden;
        height: auto;
        bottom: 0;
        left: 0;
        top: 50px;
        padding: 20px 0 0;
        z-index: 2;
        border-right: 1px solid #c8d2dc;
        transform: translateX(-280px);
        transition: transform 0.3s;
    }

    .nav--open .cd-nav-item {
        transform: translateX(0px);
    }

    .nav__overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(2px);
        visibility: hidden;
        opacity: 0;
        transition: opacity 0.3s;
    }

    .nav--open .nav__overlay {
        visibility: visible;
        opacity: 1;
    }

    .chapter {
        left: 0;
        width: 100%;
        padding: 0px 5px;
        /*position:inherit !important;*/
    }

    #title {
        left: 0;
        position: inherit !important;
        width: 100%;
    }

    .subchapter {
        left: 0;
        width: 100%;
        padding: 0px 5px;
        /*position:inherit !important;*/
    }

    p>img {
        width: 97% !important;
    }

    #chapter-description {
        width: 99%;
    }

    iframe {
        width: 70%;
        height: 70%;
    }

    .course {
        left: 0;
        width: 97%;
        position: inherit !important;
        margin-left: 15px;
    }

    .navbar-brand>img {
        margin-left: 70px;
    }

    .container-fluid {
        margin-left: 0px;
        padding-right: 15px;
    }
}

.navbar-nav>li>a {
    color: #ffffff !important;
    text-decoration: none;
}

.btn-link {
    color: #ffffff !important;
}

.navbar-nav>li>a:hover:not(.active) {
    background-color: #555;
}

.navbar-toggle {
    position: relative;
    float: right;
    padding: 9px 10px;
    margin-right: 15px;
    margin-top: 8px;
    margin-bottom: -12px !important;
    background-color: transparent;
    color: #fff;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
}

#chapter-name {
    display: flex;
}

#subchapter-name {
    display: flex;
}

#readed {
    margin-top: 18px;
}