.fixed-whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    z-index: 9999;
}
.fixed-whatsapp:before {
    content: "";
    background-repeat: no-repeat;
    background-size: 34px 34px;
    background-position: center center;
    width: 50px;
    height: 50px;
    background-image: url("https://ptspsulsel.kemenag.go.id/assets/img/logo-wa.png");
    background-color: #00c853;
    position: absolute;
    top: 0;
    left: 0;
    border-radius: 100%;
    box-shadow: 0 1px 1.5px 0 rgba(0, 0, 0, 0.12),
        0 1px 1px 0 rgba(0, 0, 0, 0.24);
}
.fixed-whatsapp:after {
    content: "Hallo kakak, chat mimin di sini yah!";
    width: 200px;
    padding: 5px 10px;
    position: absolute;
    bottom: 100%;
    margin-bottom: 10px;
    right: -150px;
    text-align: left;
    color: #555;
    border: 1px solid #dedede;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 4px;
    opacity: 0;
    transition: all 0.4s ease-in-out;
    font-size: 90%;
    line-height: 1.1;
}
.fixed-whatsapp:hover:after {
    opacity: 1;
    right: 0;
}
.prestasi_siswa {
    position: relative;
}

.prestasi_siswa .caption_text {
    display: none;
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 10px;
    background: rgba(255, 255, 255, 0.8);
}

.prestasi_siswa:hover .caption_text {
    display: block;
}