.wrapper {
    height: 100vh;
    background: #333;
}

#main-div {
    position: fixed;
    right: 30px;
    bottom: 130px;
    z-index: 9999999;
}

#main-button {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    right: 0;
    bottom: 0;
    height: 50px;
    width: 50px;
    font-size: 20px;
    color: #fff;
    cursor: pointer;
    background-color: #276059;
    box-shadow: 0 0 10px 0 rgba(0,0,0,.5);
    border-radius: 50%;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    -ms-border-radius: 50%;
    -o-border-radius: 50%;
}

#main-button ~ button {
    visibility: hidden;
    font-weight: 600;
    height: 50px;
    padding: 0 20px;
    color: #fff;
    background: linear-gradient(90deg, #00a1f5, #0064f3);
    box-shadow: 0 0 10px 0 rgba(0,0,0,.5);
    border: 0;
    position: absolute;
    z-index: -1;
    right: 0;
    bottom: 0;
    opacity: 0;
    white-space: nowrap;
    cursor: pointer;
    transition: .2s all linear;
    -webkit-transition: .2s all linear;
    -moz-transition: .2s all linear;
    -ms-transition: .2s all linear;
    -o-transition: .2s all linear;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    -ms-border-radius: 5px;
    -o-border-radius: 5px;
}

#main-button.open ~ button {
    visibility: visible;
    right: 70px;
    opacity: 1;
    transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -webkit-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -moz-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -ms-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -o-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
}

#main-button ~ a {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: -1;
    height: 50px;
    width: 50px;
    font-size: 20px;
    opacity: 0;
    text-decoration: none;
    color: #fff;
    background-color: #fff;
    box-shadow: 0 0 10px 0 rgba(0,0,0,.5);
    border-radius: 50%;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    -ms-border-radius: 50%;
    -o-border-radius: 50%;
    transition: .2s all linear;
    -webkit-transition: .2s all linear;
    -moz-transition: .2s all linear;
    -ms-transition: .2s all linear;
    -o-transition: .2s all linear;
}

#main-button ~ .telegram-color {
    background: linear-gradient(0deg, #017AB1, #01ABE6);
}

#main-button ~ .whatsapp-color {
    background: linear-gradient(0deg, #00B100, #09db09);
}

#main-button ~ .messenger-color {
    background: linear-gradient(0deg, #0078FF, #00C6FF);
}

#main-button.open ~ a {
    opacity: 1;
    transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -webkit-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -moz-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -ms-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
    -o-transition: .4s all cubic-bezier(0, 0.01, 0, 1.27);
}
#main-button.open ~ a:nth-of-type(1) {
    bottom: 60px;
}
#main-button.open ~ a:nth-of-type(2) {
    bottom: 120px;
}
#main-button.open ~ a:nth-of-type(3) {
    bottom: 180px;
}

.wave {
    animation-name: wave;
    animation-duration: 1s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

@keyframes wave {
    0% {box-shadow: 0 0 0px 0px rgba(255, 255, 255, 0.5);}
    100% {box-shadow: 0 0 0px 10px rgba(255, 255, 255, 0);}
}

.open {
    animation-iteration-count: 1;
}

.su-preloader {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background: #ffffff;
    z-index: 99999999;
}

.flower {
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    overflow: hidden;
    position: absolute;
    text-indent: -9999px;
    display: inline-block;
    width: 16px;
    height: 16px;
    background: #e96;
    border-radius: 100%;
    animation: flower 5s infinite ease-in-out;
    -webkit-animation: flower 5s infinite ease-in-out;
    transform-origin: 50%, 50%;
    -webkit-transform-origin: 50%, 50%;
    box-shadow: white 0 0 15px 0, #fd8 -12px -12px 0 4px,
    #fd8 12px -12px 0 4px,
    #fd8 12px 12px 0 4px,
    #fd8 -12px 12px 0 4px;
}

@keyframes flower {
     0% {
         transform: rotateZ(0deg);
         box-shadow: white 0 0 15px 0, #fd8 -12px -12px 0 4px, #fd8 12px -12px 0 4px, #fd8 12px 12px 0 4px, #fd8 -12px 12px 0 4px;
     }

     50% {
         transform: rotateZ(1080deg); /* 3 * 360deg */
         box-shadow: white 0 0 15px 0, #fd8 12px 12px 0 4px, #fd8 -12px 12px 0 4px, #fd8 -12px -12px 0 4px, #fd8 12px -12px 0 4px;
     }
 }

/* Thêm @@-webkit-keyframes cho trình duyệt cũ */
@-webkit-keyframes flower {
     0% {
         -webkit-transform: rotateZ(0deg);
         box-shadow: white 0 0 15px 0, #fd8 -12px -12px 0 4px, #fd8 12px -12px 0 4px, #fd8 12px 12px 0 4px, #fd8 -12px 12px 0 4px;
     }

     50% {
         -webkit-transform: rotateZ(1080deg);
         box-shadow: white 0 0 15px 0, #fd8 12px 12px 0 4px, #fd8 -12px 12px 0 4px, #fd8 -12px -12px 0 4px, #fd8 12px -12px 0 4px;
     }
 }

.spinner {
    width: 50px;
    height: 50px;
    border: 2px solid #f3f3f3;
    border-top: 3px solid #2489ce;
    /*border-top: 5px solid #f1c40f;*/
    border-radius: 100%;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    animation: spin 1s infinite ease;
}

@keyframes spin {
     from {
         transform: rotate(0deg);
     }

     to {
         transform: rotate(360deg);
     }
 }