.back {
  background-color: rgb(4, 4, 4);
}

.video-background {
  display: flex;
}

body {
  background-color: white;
}

canvas {
  z-index: -1;
  top: 0;
  left: 0;
}

.content {
  position: relative;
  z-index: 6;
  color: white;
  text-align: center;
  padding: 20px;
}

.liquid-card {
  position: absolute;
  z-index: 10;
  margin-left: 15%;
  margin-top: 10%;
  margin-bottom: 2.5%;
  width: 70%;
  height: 300px;
  border-radius: 22px;
  overflow: hidden;
  backdrop-filter: blur(3px) saturate(130%);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  justify-items: center;
  justify-content: center;
  text-align: center;
  transition-property: background, box-shadow, transform;
  transition-duration: 0.5s;
  color: white;
  padding: 20px;
  float: left;
}

.about-us {
  font-weight: bold;
}

.about-img img {
  float: left;
  margin-left: 10%;
  margin-top: 5%;
  border-radius: 5%;
  width: 350px;

}



@media only screen and (max-width:500px) {
  .liquid-card {
    width: 90%;

  }

  .liquid-card:hover {
    width: 90%;
    box-shadow: #00BFFF 5px 5px;
  }

  .about-img img {
    width: 0%;
  }

}


/*position panal*/

.position_box {
  background-color: rgb(255, 255, 255);
  width: 100%;
  float: left;
}

.position_header {
  width: 40%;
  font-weight: bold;
  padding: 0.5%;
  background-color: aqua;
  clip-path: polygon(0% 0%, 90% 0%, 100% 100%, 0% 100%);
  margin-left: 1%;
  margin-top: 3%;
  text-align: center;
}

.position_row {
  justify-content: center;
  align-items: center;
}

.position {
  margin-top: 0;
  margin-left: 3%;
  padding: 2%;
  float: left;
}


@media only screen and (max-width:500px) {}

/*CM members*/

.CM_member img {
  border-radius: 40%;
  width: 50%;

}

.CM_position {
  margin-top: 0;
  margin-left: 2%;
  padding: 1%;
  float: left;
}

.AC_year {
  padding: 2%;
  height: 240px;
  margin-top: 5%;
  justify-content: center;
  align-items: center;
  width: 100%;
  border-style: inset;
}

.year {
  font-size: 20px;
  font-weight: bold;

}

@media only screen and (max-width:500px) {
  .AC_year {
    border-style: none;
  }
}

}

.Activity {
  clear: both;
  margin-top: 50px;
  padding-bottom: 50px;
  background-color: white;
  width: 100%;
  padding: 2%;
}

.active-content h4 {
  font-weight: bold;
  margin-top: 2%;
}

.img-active img {
  width: 25%;

}

.img-active {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.video-active {
  display: flex;
  justify-content: center;
  align-items: center;
}

.video-active iframe {
  margin-top: 2%;
}

.one-activity {
  margin-bottom: 2%;
}

/* ================= BACK TO TOP ================= */
#back-to-top-button {
  position: fixed;
  right: 50px;
  bottom: 50px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: #00ff7f;
  border: none;
  font-size: 22px;
  z-index: 100;
}