:root {
    --bch-zindex: 100;
    --bch-bottom-space: 20px;
    --bch-horizontal-space: 20px;
    --bch-button-size: 48px;
    --bch-svg-size: 36px;
    --bch-item-space: 1em;
    --bch-border-radius: 12px;
    --bch-color-border: #fefefe;
    --bch-color-white: #fff;
    --bch-color-text: #fff;
    --bch-bgcolor-text: #777;
    --bch-bgcolor-dark: #333;
    --bch-bgcolor-zalo: #0091ff;
    --bch-bgcolor-messenger: #1877f2;
    --bch-bgcolor-WhatsApp: #29a71a;
    --bch-bgcolor-phone: #ff6a00;
    --bch-bgcolor-button: #dc3545;
}
.bch-block{position:fixed;bottom:var(--bch-bottom-space);z-index:var(--bch-zindex)}
.bch-block *{box-sizing:border-box}
.bch-block.position-left{left:var(--bch-bottom-space)}
.bch-block.position-right{right:var(--bch-bottom-space)}
.bch-block.position-left-center{bottom:50%;left:var(--bch-bottom-space)}
.bch-block.position-right-center{bottom:50%;right:var(--bch-bottom-space)}
.bch-block.position-left-center .bch-block__text,.bch-block.position-left .bch-block__text{margin-left:.5em}
.bch-block.position-right-center .bch-block__text,.bch-block.position-right .bch-block__text{margin-right:.5em}
.bch-block.position-left-center .bch-block__item,.bch-block.position-left .bch-block__item{justify-content:flex-start}
.bch-block.position-right-center .bch-block__item,.bch-block.position-right .bch-block__item{justify-content:flex-end}
.bch-block.position-right-center .bch-block__toggle-button,.bch-block.position-right .bch-block__toggle-button{align-self:flex-end}
.bch-block.position-left-center .bch-block__url,.bch-block.position-left .bch-block__url{flex-direction:row-reverse}
.bch-block.text-hover .bch-block__text{opacity:0;transform:translateY(4px);pointer-events:none;transition:transform .4s ease-in-out;will-change:transform}
.bch-block.text-hover .bch-block__item:hover .bch-block__text{opacity:1;transform:translateY(0)}
.bch-block__inner{display:flex;flex-direction:column}
.bch-block__list{margin:0;padding:0;list-style:none;transition:transform .4s ease-in-out,opacity .4s ease-in-out}
.bch-block__item,.bch-block__url{display:flex;align-items:center}
.bch-block__url{text-decoration:none}
.bch-block__item{margin-bottom:var(--bch-item-space)}
.bch-block__item.is-messenger:hover .bch-block__text,.bch-block__item.is-messenger .bch-block__icon{background:var(--bch-bgcolor-messenger)}
.bch-block__item.is-WhatsApp:hover .bch-block__text,.bch-block__item.is-WhatsApp .bch-block__icon{background:var(--bch-bgcolor-WhatsApp)}
.bch-block__item.is-zalo:hover .bch-block__text,.bch-block__item.is-zalo .bch-block__icon{background:var(--bch-bgcolor-zalo)}
.bch-block__item.is-phone:hover .bch-block__text,.bch-block__item.is-phone .bch-block__icon{background:var(--bch-bgcolor-phone)}
.bch-block__text{display:inline-block;padding:4px 8px;background:var(--bch-bgcolor-text);color:var(--bch-color-text);font-size:13px;box-shadow:#63636333 0 2px 8px;border:2px solid var(--bch-color-border);border-radius:var(--bch-border-radius);user-select:none;pointer-events:none;transition:all .4s ease}
.bch-block__icon{display:flex;align-items:center;justify-content:center;flex-direction:column;width:var(--bch-button-size);height:var(--bch-button-size);padding:6px;background:var(--bch-bgcolor-dark);animation:ring 1s linear infinite;border-radius:50%;border:3px solid var(--bch-bgcolor-white)}
.bch-block__icon svg{width:var(--bch-svg-size);height:var(--bch-svg-size);fill:var(--bch-color-white)}
.bch-block .bch-block__inner .bch-block__toggle-button{position:relative;display:inline-flex;align-items:center;justify-content:center;margin-top:.25em;width:48px;height:48px;background:var(--bch-bgcolor-dark);color:var(--bch-color-text);border:2px solid var(--bch-color-border);border-radius:50%;cursor:pointer;transition:all .5s ease;overflow:hidden}
.bch-block__toggle-button svg{width:32px;height:32px;fill:var(--bch-color-white)}
.bch-block__toggle-button span{position:absolute;top:4px;left:4px;width:36px;height:36px;z-index:1;pointer-events:none;transition:transform .5s ease-in-out}
@keyframes ring {
    0%{transform:scaleZ(1)}
    10%,20%{transform:scale3d(.9,.9,.9) rotate3d(0,0,1,-3deg)}
    30%,50%,70%,90%{transform:scale3d(1.1,1.1,1.1) rotate3d(0,0,1,3deg)}
    40%,60%,80%{transform:scale3d(1.1,1.1,1.1) rotate3d(0,0,1,-3deg)}
    to{transform:scaleZ(1)}
}
.bch-block .open-icon{transform:translateY(150%)}
.bch-block.is-hidden .open-icon{transform:translateY(0)}
.bch-block.is-hidden .close-icon{transform:translateY(150%)}
.bch-block__list{opacity:1;transform:translateY(0)}
.bch-block.is-hidden .bch-block__list{opacity:0;transform:translateY(15px);pointer-events:none;transition:.5s ease-in-out}
.bch-block.is-hidden .bch-block__toggle-button{background:var(--bch-bgcolor-button)}