.chatArea, .noteArea{
    position: relative;
    height: 768px;
    width: 20%;
    background-color: lightblue;
    margin: 0 2% 0 2%;
    border-radius: 0 20px 20px 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.chatArea{
    position: relative;
    border-radius: 20px 0 0 20px;
    filter: opacity(0.8);
    pointer-events: none;
}

.chatArea.hasEvent{
    pointer-events: all;
}

.chatNoOpen{
    display: block;
    position: absolute;
    font-size: 2.5rem;
    font-weight: bold;
    color: #ff4d4d;
    top: 50%;   
    left: 50%;
    width: 80%;
    text-shadow: 0px 0px 20px white;
    transform: translate(-50%, -100%);
}

.conChatContent{
    overflow: scroll;
}

.chatNoOpen.nonShow{
    display: none;
}

.diveContentTitle{
    position: relative;
    height: 7%;
    font-size: 1.5rem;
    font-weight: bold;
    transform: translate(5%, 10%);
}

.diveContentTitle::first-letter{
    font-size: 2.4rem;
    color: #FC5185;
}

.diveContentTitle::after{
    position: absolute;
    content: "";
    height: 3px;
    width: 80%;
    bottom: 0;
    left: 0;
    background-color: #07182E;
}

.chatMessenge, .noteMessenge{
    height: 80%;
    width: 100%;
    overflow-y: scroll;
}

.noteMessenge > ul > li{
    font-size: 1.1rem;
    padding: 2%;
    width: 80%;
    overflow-wrap: break-word;
}

.chatMessenge > ul > li::marker{
    content: "🔺";
}

.chatMessenge > ul > li{
    font-size: 1.1rem;
    padding: 2%;
    width: 80%;
    overflow-wrap: break-word;
}

.noteLiTrashCan, .noteLiShare{
    width: 7%;
    aspect-ratio: 1/1;
    opacity: 0;
    float: right;
    margin: 2%;
    transition: 0.5s linear;
}

.noteLiTrashCan:hover, .noteLiShare:hover{
    transform: scale(1.2);
    filter: drop-shadow(0px 0px 2px lightcoral);
}

.noteMessenge > ul > li:hover{
    background-color: rgba(255, 255, 255, 0.3);
}

.noteMessenge > ul > li:hover .noteLiTrashCan{
    opacity: 1;
}

.noteMessenge > ul > li:hover .noteLiShare{
    opacity: 1;
}

.noteMessenge > ul > li::marker{
    content: "🔹";
}

.noteCurrentNote{
    width: 75%;
    height: 40px;
    margin-top: 6%;
    border-radius: 4%;
    background-color: #FFF9DE;
    transform: translate(10%);
    overflow: hidden;
    transition: 0.5s linear;
}

.noteCurrentNote:hover{
    height: 200px;
    overflow: scroll;
}

.noteCurrentNote > ul{
    margin: 0;
    padding: 0;
}

.noteCurrentNote > ul > li{
    text-align: center;
    user-select: none;
    width: 100%;
    height: 40px;
    color: #07182E;
    font-weight: bold;
    font-size: 1.2rem;
    line-height: 40px;
}

.noteCurrentNote > ul > li:nth-child(1){
    background-color: #b6d7a8;
}

.noteCurrentNote > ul > li:not(:nth-child(1)):hover{
    background-color: #FF6969;
}


.noteCurrentNote > ul > li::marker{
    content: "";
}

.diveinputArea{
    position: relative;
    height: 10%;
    width: 100%;
    background-color: #07182E;
    border-radius: 0 0 0 20px;
}

.DIA_note{
    border-radius: 0 0 20px 0px;
}

.diveInput{
    position: absolute;
    left: 4%;
    top: 50%;
    height: 60%;
    width: 75%;
    transform: translateY(-50%);
    border-radius: 40px;
    overflow-wrap: inherit;
    border: 0;
    font-size: 1rem;
}

.diveInput:focus{
    border: 0;
    outline: none;
}

.btnSend{
    position: absolute;
    width: 12%;
    aspect-ratio: 1/1;
    left: 85%;
    top: 50%;
    transform: translateY(-50%);
    border-radius: 50%;
}

.btnSend:hover{
    filter: brightness(1.2);
    -webkit-filter: drop-shadow(0px 0px 20px white);
}

.diveArea{
    background-color: lightcoral;
    height: 768px;
    width: 1024px;
}

.course{
    width: 30%;
    height: 80%;
    margin: 2%;
    border-radius: 5%;
    background-color: rgb(253, 253, 158);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    opacity: 0;
    transform: translateY(100%);
    transition: 1s ease;
}

.course.active, .diveContent.active{
    opacity: 1;
    transform: translateY(0);
}

.course > h1::first-letter{
    font-size: 3rem;
    color: #FC5185;
    font-weight: bold;
}

.coursesList{
    width: 90%;
    height: 60%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.noOpenCourse{
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    border-radius: 5%;
    transform: translateY(-5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3;
}

.noOpenCourse > div{
    font-size: 5rem;
    color: #FF6969;
    font-weight: bold;
    user-select: none;
}

.courseLink, .courseFinPer{
    position: relative;
    font-size: 1.6rem;
    font-weight: bold;
    margin: 3%;
    user-select: none;
}

.courseLink::before{
    content: "👆";
    position: absolute;
    top: 0;
    left: 0;
    border-radius: 5px;
    width: 50%;
    height: 3px;
    top: 100%;
    z-index: -1;
    background-color: #b6d7a8;
    transition: transform 0.3s ease;

    transform: scaleX(0);
    transform-origin: right;
}

.courseLink:hover::before{
    transform: scaleX(1);
    transform-origin: left;
}

.courseLink::after{
    content: " ❌ （尚未完成）";
    font-size: 1.2rem;
    color: #FC5185;
}

.courseLink.finish::after{
    content: " ✔️（完成）";
    font-size: 1.2rem;
    color: lightgreen;
}

.courseLink:hover{
    animation: color 2s linear infinite;
    color: #FC5185;
}

@keyframes color {
    to{
        filter: hue-rotate(360deg);
    }
}

.waitForConnect{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40%;
    height: 40%;
    transform: translate(-50%, -50%);
    background-color: #FC5185;
    display: none;
    opacity: 0;
    transition: 0.5s ease;
    border-radius: 20px;
    flex-direction: column;
    align-items: center;
}

.waitForConnect.active{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 38%;
    height: 45%;
    transform: translate(-50%, -50%);
    background-color: #FF6969;
    display: flex;
    opacity: 1;
}

.waitForConnect > h1{
    position: relative;
    height: 10%;
    width: 100%;
    text-align: center;
    color: white;
}

.waitForConnect > h1::before{
    content: "";
    position: absolute;
    height: 3px;
    background: white;
    width: 100%;
    bottom: -10px;
    left: 0;
    animation: scale 1s linear infinite alternate-reverse;

    transform: scale(0);
    transform-origin: center;
}

@keyframes scale {
    to{
        transform: scale(1);
    }
}

.connectBtn{
    width: 30%;
    height: 15%;
    background: white;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: hue_filter 3s linear infinite;
    box-shadow: 0px 0px 20px #b6d7a8;
}

.connectBtn h2 {
    z-index: 1;
    color: #FC5185;
    font-size: 1.4rem;
    user-select: none;
    font-weight: bold;
  }

@keyframes hue_filter {
    to{
        filter: hue-rotate(360deg);
    }
  }

.connect_player{
    height: 45%;
    width: 90%;
    margin: 4%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    flex-wrap: nowrap;
}

.playerList{
    position: relative;
    height: 100%;
    width: 100%;
    background-color: #A6D0DD;
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    animation: upDown 2s ease-in-out alternate-reverse infinite;
    transform: translateY(-5%);
    transition: 1s linear;
}

.playerList:nth-child(2){
    background-color: #FFD3B0;
}

.playerList:nth-child(3){
    background-color: #FFF9DE;
}

.playerIcon{
    position: relative;
    aspect-ratio: 1/1;
    height: 80%;
    filter: drop-shadow(0px 0px 5px black);
}

@keyframes upDown {
    to{
        transform: translateY(5%);
        opacity: 0.9;
        box-shadow: 0px 2px 20px 1px #FF6969;
    }
}