body {
    margin: 0;
    background-color: #E0EBFF !important;
    display: flex;
}

.exercise-nav-container {
    display: flex;
    flex-direction: column;
    background-color: #818DFC;
    padding: 10px;
}

.exercise-nav-container nav {
    display: flex;
    flex-direction: column;
    justify-content: center; 
    align-items: center;
    padding-top: 200px;
}

.exercise-nav-container nav a {
    display: block;
    width: 100%;
    padding: 10px;
    cursor: pointer;
    margin-bottom: 30px;
    text-align: center; 
}

.exercise-nav-container .navbar_li {
    display: block;
    cursor: pointer;
}

.exercise-nav-container nav a:hover {
    background-color: #D9D9D9;
    opacity: 0.2;
}

.exercise-nav-container .nav_text {
    color: white;
    font-size: 1em;
    margin: auto;
    line-height: 50px;
    padding: 20px 30px;
}


.main-container {
    flex-grow: 1; 
    padding: 20px; 
}

/* title and hidden timer */
h1 {
    padding-top: 90px;
    text-align: center;
}

#hidden-div {
    display: none;
}

/* Additional styling for the logo */
.exercise-nav-container .navbar_logo {
    max-width: 100%;
    height: auto;
}
nav {
    color: white;
    font-size: 26px;
}
.main-container {
    flex-grow: 1; 
    padding: 20px; 
}

/*video layout*/

#video-container {
    display: flex;
    justify-content: center;
}

#video-container iframe {
    width: 700px;
    height: 400px;
}

#instructions {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
}

div > ul {
    width: 100%;
    list-style-position: inside;
}

div > ul > li {
    text-align: center;
}

/* instructions div */
h2 {
    padding-left: 50px;
    display: flex;
    justify-content: center;
    text-decoration: underline;
}

/* displaying button */
#exercise-button {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

#timer > img {
    align-self: center;
    height: 20px;
}

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

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

/* hidden div to switch nav */
.level-div {
    display: none;
}

.level-div.active {
    display: block;
    margin-top: 10px;
    padding: 20px;
}

.nested-div {
    margin-bottom: 10px;
}

.nextButton {
    text-align: center;
    width: fit-content;
    padding: 10px 16px;
    border-radius: 12px;
    margin: 20px 15px;
    font-size: 30px;
    transition-property: background-color,border-color,color,box-shadow,filter;
    transition-duration: .3s;
    background-color: #FFFFF2;
    color:  #555555;
    user-select: none;
}