.btn-round {
    width: 100px;
    height: 100px;
    border-radius: 100px;
    background-color: blue;
}
.btn-square {
    width: 100px;
    height: 100px;
    background-color: blue;
}
.close {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 50px;
    top: 25px;
    left: 25px;
    overflow: hidden;
}
.close::before, .close::after {
    content: '';
    position: absolute;
    height: 2px;
    width: 100%;
    top: 50%;
    left: 0;
    margin-top: -1px;
    background: #7C8B9C;
}
.close::before {
    transform: rotate(0deg);
}
.close::after {
    transform: rotate(90deg);
}
.animated {
    -webkit-animation-duration: 1s;
    animation-duration: 1s;
    -webkit-animation-fill-mode: both;
    animation-fill-mode: both;
}
@-webkit-keyframes plusButton {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, -135deg);
        transform: rotate3d(0, 0, 1, -135deg);
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: none;
        transform: none;
    }
}
@keyframes plusButton {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, 135deg);
        transform: rotate3d(0, 0, 1, 135deg);
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: none;
        transform: none;
    }
}
.plusButton {
    -webkit-animation-name: plusButton;
    animation-name: plusButton;
}
@-webkit-keyframes closeButton {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: none;
        transform: none;
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, 135deg);
        transform: rotate3d(0, 0, 1, 135deg);
    }
}
@keyframes closeButton {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: none;
        transform: none;
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, 135deg);
        transform: rotate3d(0, 0, 1, 135deg);
    }
}
.closeButton {
    -webkit-animation-name: closeButton;
    animation-name: closeButton;
}
@-webkit-keyframes circleShape {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, 135deg);
        transform: rotate3d(0, 0, 1, 135deg);
        border-radius: 100px;
    }
}
@keyframes circleShape {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, 135deg);
        transform: rotate3d(0, 0, 1, 135deg);
        border-radius: 100px;
    }
}
.circleShape {
    -webkit-animation-name: circleShape;
    animation-name: circleShape;
}
@-webkit-keyframes squareShape {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, 135deg);
        transform: rotate3d(0, 0, 1, 135deg);
        border-radius: 100px;
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        border-radius: 0px;
    }
}
@keyframes squareShape {
    from {
        -webkit-transform-origin: center;
        transform-origin: center;
        -webkit-transform: rotate3d(0, 0, 1, 135deg);
        transform: rotate3d(0, 0, 1, 135deg);
        border-radius: 100px;
    }
    to {
        -webkit-transform-origin: center;
        transform-origin: center;
        border-radius: 0px;
    }
}
.squareShape {
    -webkit-animation-name: squareShape;
    animation-name: squareShape;
}