.content-area {
    display: flex;
    justify-content:space-around;
    width: 1920px;
    min-height: calc(100vh - 154px);
    margin: 0;
}

.left-content {
    width: 200px;
    min-height: calc(100vh - 174px);
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    border-bottom-left-radius: 15px;
    border-bottom-right-radius: 15px;
}

.arrow{
    margin-left: 15px;
}

.odd {
    text-decoration: none;
    height: 70px;
    display: flex;
    background-color: #ffcc99;
    align-items: center;
    border-bottom: 3px solid #ff9933;
}

.even {
    text-decoration: none;
    height: 70px;
    display: flex;
    background-color: #ffffff;
    align-items: center;
    border-bottom: 3px solid #ff9933;
}

.link-text{
    color: #000000;
    font-weight: bold;
    text-decoration: none;
    margin-left: 10px;
}

.lesson-menu-header {
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    height: 35px;
    background-color: #ff9933;
    font-size: 20px;
    padding: 3px 15px;
    font-weight: bold;
}

.main-content {
    width: 1200px;
    background-color: #ffffff;
    border-radius: 15px;
    margin-top: 20px;
    margin-bottom: 20px;
    background-color: #fffcf9;
}

.lesson-section {
    width: 1200px;
    height: 35px;
    background-color: #ff9933;
    font-size: 20px;
    padding: 3px 25px;
    font-weight: bold;
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    margin-top: 0;
}

.lesson-icon{
    display: inline-block;
    height: 20px;
    line-height: 14px;
    font-size: 14px;
    color: #ffffff;
    background-color: #cc0066;
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
    text-align: center;
    padding: 2px 10px;
    margin: 0;
}

.lesson-exp-group{
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

.lesson-exp{
    display: inline-block;
    height: 20px;
    line-height: 14px;
    font-size: 14px;
    border: 2px solid #cccccc;
    border-left: none;
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
    padding: 0 15px 0 10px;
    margin: 0 5px 0 0;
    background-color: #ffffff;
}

.pan-list{
    margin: 0 10px;
}

.dl-style{
    font-weight: bold;
    color: #0000ff;
    text-decoration: none;
}

.sub-section{
    padding: 5px 10px;
    margin: 20px 20px 5px 20px;
    border-top: 2px dashed #ff9933;
    border-bottom: 2px dashed #ff9933;
    background-color: #ffcc66;
}

.sub-document{
    margin: 20px 40px 10px 30px;
    background-color: #ffffff;
    padding: 15px 40px;
    border-radius: 20px;
    border: 2px dashed #cccccc;
}

.sub-image{
    margin: 0px 40px 10px 30px;
    border-radius: 10px;
    border: 3px solid #aaaaaa;
}

.movie-layout{
    width: 90%;
    margin: 20px 0;
    border: 2px solid #000000;
}

.radio{
    margin-left: 10px;
}

.radio-button{
    padding: 10px 20px;
    font-size: 18px;
    font-weight: bold;
    color: #ffffff;
    background-color: #ff9933;
    border: 2px solid #cccccc;
    border-radius: 12px;
    margin-left: 20px;
    cursor: pointer;
}

.delete-button{
    padding: 10px 20px;
    font-size: 18px;
    font-weight: bold;
    color: #ffffff;
    background-color: #ff0033;
    border: 2px solid #cccccc;
    border-radius: 12px;
    margin: 10px 0 0 0;
    cursor: pointer;
}

.record-container{
    margin: 10px 30px;
}

.form-error {
    font-size: 18px;
    line-height: 24px;
    min-height: 24px;
    color: #ff0000;
    text-align: left;
}

.right-content {
    width: 400px;
    min-height: calc(100vh - 174px);
    background-color: #fffcf9;
    margin: 20px 0 20px 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-bottom-left-radius: 15px;
    border-bottom-right-radius: 15px;
}

.put-day-area {
    display: flex;
    justify-content: center;
    margin: 5px 0;
}

.put-day {
    padding: 2px 15px;
    background-color: #c6c6c6;
    display: inline-block;
    font-size: 14px;
    border-radius: 10px;
}

.user-area-left {
    display: flex;
    margin: 10px 15px 5px 15px;
}

.user-area-right {
    display: flex;
    margin: 10px 30px 5px 15px;
    justify-content: end;
}

.user-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #cce5ff;
    position: relative;
    display: inline-block;
    box-sizing: border-box;
}

.user-icon::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 24%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
}

.user-icon::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 10px;
    border-radius: 10px / 6px;
    background: #fff;
    box-shadow: 0 2px 0 rgba(0, 0, 0, 0.02) inset;
}

.user-name {
    font-size: 14px;
    line-height: 40px;
    margin-left: 10px;
}

.put-time {
    font-size: 14px;
    line-height: 40px;
    margin-left: 10px;
}

.put-comment {
    width: 350px;
    padding: 10px 15px;
    background-color: #99ff99;
    border-radius: 10px;
    margin: 0 15px 15px 15px;
}

.put-comment-admin{
    width: 350px;
    padding: 10px 15px;
    background-color: #ffffee;
    border-radius: 10px;
    margin: 0 15px 15px 15px;
    border: 2px solid #cccccc;
}

.send-area {
    display: flex;
    align-items: center;
}

.chat-header {
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
    height: 35px;
    background-color: #ff9933;
    font-size: 20px;
    padding: 3px 25px;
    font-weight: bold;
    margin-bottom: 20px;
}

.chat-footer {
    padding: 15px;
}

.chat-input {
    width: 320px;
    height: 40px;
    margin: 15px 0 0 0;
    background-color: #ffffff;
    border: 1px solid #aaaaaa;
    font-size: 18px;
    color: #000000;
    padding: 10px 15px;
    resize: none;
}

.icon {
    width: 25px;
    height: 25px;
    margin-top: 15px;
    margin-left: 5px;
    cursor: pointer;
}