*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: serif;
}

body.lock {
    overflow: hidden;
}

.popup{
    position: fixed;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    top: 0;
    left: 0;
    opacity: 0;
    visibility: hidden;
    overflow-y: auto; 
    overflow-x: hidden;
    transition: all 0.8s ease 0s;
}

.popup.open {
    opacity: 1;
    visibility: visible;
}

.popup.open .popup__content {
    transform: perspective(600px) translate(0px, 0px) rotateX(0);
    opacity: 1;
}

.popup__body{
    min-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px 10px;
}

.popup__content{
    background-color: #fff;
    color: #000;
    max-width: 800px;
    padding: 30px;
    position: relative;
    transition: all 0.8s ease 0s;
    opacity: 0;
    transform: perspective(600px) translate(0px, -100%) rotateX(45deg);
}

.popup__close{
    color: #000;
    position: absolute;
    right: 10px;
    top: 10px;
    font-size: 20px;
    cursor: pointer;
}

.popup__title{
    font-size: 40px;
    margin: 0px 0px 1em 0px;
}