body{
    padding: 0;
    margin: 0;
    background: url("../imgs/bg_01.png") repeat;
    background-color: #63b9ff;
}
.btn-down{
    background: #00b3ff;
    color: #f7ffec;
}
.btn-down:link{
    background: #19e4ff;
    color: #f5f5ff;
}
.btn-down:hover{
    background: #00b3ff;
    color: #f5faff;
}
.btn-down:active{
    background: #0085bb;
    color: #f5f5ff;
}

.glass_5px{
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}