html , body , #ct{
    margin:0px;
    height: 100%;
    user-select:none;
    overflow: hidden;
}
#menu{
    display: none;
    border-radius: 100%;
    width: 250px;
    height: 250px;
    position: fixed;
    left: 50%;
    top:20%;
    z-index:10;
    color:#fff;
}
#menu > div{
    display:none;
}
#menu_4-1{
    display: inline-block;
    width: 125px;
    height: 125px;
    background: radial-gradient(at 100% 100%,#19344100 29%, #193441dd 30%);
    border-radius: 125px 0 0 0;
    text-align: center;
    top: calc(0%);
    left: calc(0%);
    position: absolute;
}
#menu_4-1:hover{
    font-weight: bold;
    text-shadow: 2px 2px 5px #00e5ff;
    background: radial-gradient(at 100% 100%,#19344100 29%, #193441dd 30%);
    border-top: 4px #00e5ff solid;
    border-left: 4px #00e5ff solid;
    top: -5%;
    left: -5%;
}
#menu_4-2{
    display: inline-block;
    width: 125px;
    height: 125px;
    background: radial-gradient(at 0% 100%,#19344100 29%, #193441dd 30%);
    border-radius: 0 125px 0 0;
    text-align: center;
    top: calc(0%);
    left: calc(50%);
    position: absolute;
}
#menu_4-2:hover{
    font-weight: bold;
    text-shadow: 2px 2px 5px #00e5ff;
    background: radial-gradient(at 0% 100%,#19344100 29%, #193441dd 30%);
    border-top: 4px #00e5ff solid;
    border-right: 4px #00e5ff solid;
    top: -5%;
    left: 55%;
}
#menu_4-3{
    display: inline-block;
    width: 125px;
    height: 125px;
    background: radial-gradient(at 100% 0%,#19344100 29%, #193441dd 30%);
    border-radius: 0 0 0 125px;
    text-align: center;
    top: calc(50%);
    left: calc(0%);
    position: absolute;
}
#menu_4-3:hover{
    font-weight: bold;
    text-shadow: 2px 2px 5px #00e5ff;
    background: radial-gradient(at 100% 0%,#19344100 29%, #193441dd 30%);
    border-bottom: 4px #00e5ff solid;
    border-left: 4px #00e5ff solid;
    top: 55%;
    left: -5%;
}
#menu_4-4{
    display: inline-block;
    width: 125px;
    height: 125px;
    background: radial-gradient(at 0% 0%,#19344100 29%, #193441dd 30%);
    border-radius: 0 0 125px 0;
    text-align: center;
    top: calc(50%);
    left: calc(50%);
    position: absolute;
}
#menu_4-4:hover{
    font-weight: bold;
    text-shadow: 2px 2px 5px #00e5ff;
    background: radial-gradient(at 0% 0%,#19344100 29%, #193441dd 30%);
    border-bottom: 4px #00e5ff solid;
    border-right: 4px #00e5ff solid;
    top: 55%;
    left: 55%;
}
#menu_c{
    position: absolute;
    width: 100px;
    height: 100px;
    border-radius: 100%;
    display: inline-block;
    top: calc(50% - 50px);
    left: calc(50% - 50px);
    color:#fff;
}
#menu_c2-1{
    position: absolute;
    width: 100px;
    height: 50px;
    background-color: #1d495ecc;
    border-radius: 100px 100px 0 0;
    display: inline-block;
    top: calc(50% - 50px);
    left: calc(50% - 50px);
    line-height: 50px;
    text-align: center;
}
#menu_c2-1:hover{
    box-shadow: 0px 0px 5px 0px #000;
    font-weight: bold;
    text-shadow: 2px 2px 5px #00e5ff;
}
#menu_c2-2{
    position: absolute;
    width: 100px;
    height: 50px;
    background-color: #1d495ecc;
    border-radius: 0 0 100px 100px;
    display: inline-block;
    top: 50%;
    left: calc(50% - 50px);
    text-align: center;
    line-height: 50px;
}
#menu_c2-2:hover{
    box-shadow: 0px 0px 5px 0px #000;
    font-weight: bold;
    text-shadow: 2px 2px 5px #00e5ff;
}

#menu_c-x{
    position: absolute;
    border-radius: 100%;
    background-color: #04344aa8;
    text-align: center;
    font-size: small;
}
.menu_c-x-2{
    width: 30px;
    line-height: 30px;
    left: calc(50% - 15px);
    top: calc(50% - 15px);
}
.menu_c-x-only{
    width: 50px;
    line-height: 50px;
    left: calc(50% - 25px);
    top: calc(50% - 25px);
}

#menu_c-x:hover{
    box-shadow: 0px 0px 5px 0px #000;
    font-weight: bold;
    text-shadow: 2px 2px 5px #00e5ff;
}