:root{
    --login-bg:#c6cee3;
    --front: rgba(113, 113, 232, 0.6);
    --back: rgba(78, 78, 158, 0.6);

}
iframe{
    position: fixed;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    z-index: -1;
}
body{
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
    background-color: var(--login-bg);
    position: relative;
}
.setting{
    position: absolute;
    right: 30px;
    top: 10px;
    width: 50px;
    display: flex;
    flex-direction: column;

}
.setting:hover{
    cursor: pointer;
}
.setting img{
    width: 30px;
    height:30px;
}
ul{
    padding: 0;
    margin: 0;
    display: none;
}
.setting div {
    margin: 2px;
    padding: 2px;
    width: 50px;
    height: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.setting div:hover{
    background-color: #999999;
}
.main{
    width: 850px;
    height: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: rgba(173, 187, 228, 0.19);
    box-shadow: 0.3rem 0.3rem 0.6rem #7e869d, -0.2rem -0.2rem 0.5rem  #9391c3;
    border-radius: 5px;
}
.head{
    display: flex;
    flex-direction:row;
    padding: 10px 0;
    font-weight: bold;
}
.head div{
    margin: 3px 15px;
    padding: 6px 9px;
    border-radius: 5px;
    transition: all 0.3s ease;
    display: flex;
    font-size: 18px;
    color: rgba(245, 241, 241, 0.62);
    align-items: center;
}
.head div img{
    width: 35px;
    height: 35px;
    margin: 2px 3px;
}
.head div:hover{
    background-color: rgba(63, 76, 189, 0.34);
    transform: scale(1.05);
    color: white;
    cursor: pointer;
}
.main .head .big{
    background-color: rgba(63, 76, 189, 0.83);
    transform: scale(1.05);
    color: white;
}
.head div:active{
    transform: scale(0.95);
}
.body{
    border-radius: 10px;
    position: relative;
    width: 800px;
    height: 500px;
    /*background-color: #662bd3;*/
    transition: all 0.5s;
    transform-style: preserve-3d;
}
.body .front{
    z-index: 1;
    background-color:var(--front);
}
.body .front,.body .back{
    position: absolute;
    top: 0;
    left:0;
    width: 800px;
    height: 500px;
    border-radius: 10px;
    border: none;
    display: flex;
}
.back{
    transform: translateY(250px) rotateX(-90deg);
    background-color:var(--back);
}
.body div .left{
    width: 350px;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: #be7dec 0 0 10px 0
}
.body div .right{
    width: 500px;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}
.body div .right .exist{
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    text-align: center;
    display: none;
}
.body form{
    display: flex;
    flex-direction: column;
align-items: center;
    transform: translateY(-50px);
}
.body form h2{
    text-align: center;
    margin-top: 30px;
}
.body form input{
    outline: none;
    background:none;
    border: none;
    width: 200px;
    height: 50px;
    margin: 20px 0;
    font-size: 16px;
    border-bottom: 1px solid white;
    transition: all 0.3s ease;
    color: white;
}
.body form input::placeholder{
    color:white;
}
.body form input:focus{
    border: white solid 1px;
    transform: scale(1.2);
}
.body form button{
    outline: none;
    border: none;
    width: 120px;
    height: 50px;
    background-color: #8751ea;
    border-radius: 15px;
    font-size: 18px;
    margin-top: 20px;
    transition: all 0.3s ease;
    color: white;
}
.body form button:hover{
    transform: scale(1.1);
}
.body form button:active{
    transform: scale(0.9);
}
.left .welcome{
    font-size: 30px;
    font-weight: bold;
    margin-bottom: 50px;
}
.left img{
    width: 120px;
    height: 120px;
}
.left p{
    font-size: 18px;
}