h2::after {
  background: linear-gradient(to right, #1a1a1a 0px, #1a1a1a 10px, #124e84 10px, #124e84 80px);
  bottom: 10px;
  display: block;
  content: "";
  height: 2px;
  margin: 10px 0 20px 0;
  width: 80px;
}

body {
  background-image: url("https://jbu_ftp.sidearmsports.com/custompages/css/gameday/background-blue-repeat.jpg");
  background-repeat: repeat;
  background-color: #eeef0;
}

.button-header {width: 100%; max-width: 1416px; margin: auto;}
.button-subheader {display: flex; flex-wrap: wrap; width: 100%; margin: auto;}

.button-subheader .button-sub-btn {
  display: flex;
  align-items: center;
  border: 1px solid lightgrey;
  text-decoration: none;
  width: calc(50% - 25px);
  height: 5.0vw;
  text-align: center;
  padding: 15px;
  margin: 5px;
  justify-content: center;
  text-transform: uppercase;
  font-weight: bold;
  color: #1a1a1a;
  position: relative;
  overflow: hidden;
  transition: .25s;
  background-color: #fff;
}

.button-subheader .button-sub-btn::before {
  content: "";
  background-size: cover;
  background-position: center;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  opacity: 0;
  filter: grayscale(100%);
  transition: opacity 0.25s;
}

.button-subheader .button-sub-btn:hover::before {
  opacity: 0.5;
}

.btn-1::before {
  background-image: url("https://jbu_ftp.sidearmsports.com/custompages/css/sport-file-assets/legacy-vault-all-americans.jpg");
  background-position: center;
  background-size: cover;
}

.btn-2::before {
  background-image: url("https://jbu_ftp.sidearmsports.com/custompages/css/sport-file-assets/legacy-vault-hall-of-fame.jpg");
}

.btn-3::before {
  background-image: url("https://jbu_ftp.sidearmsports.com/custompages/css/sport-file-assets/legacy-vault-wall-of-fame.jpg");
}

.btn-4::before {
  background-image: url("https://jbu_ftp.sidearmsports.com/custompages/css/sport-file-assets/legacy-vault-team-championships.jpg");
}

.btn-5::before {
  background-image: url("https://jbu_ftp.sidearmsports.com/custompages/css/sport-file-assets/legacy-vault-commissioners-cup.jpg");
}

.button-subheader .button-sub-btn:hover {
  color: #fff;
  border: 1px solid #1b76c7;
  background-color: #124e84;
}

.button-subheader .button-sub-btn:hover i, 
.button-subheader .button-sub-btn:hover span {
  visibility: hidden;
}

.button-subheader .button-sub-btn i, 
.button-subheader .button-sub-btn span {
  visibility: visible;
  z-index: 1;
}

.button-subheader .button-sub-btn span {
  display: inline-block;
}

@media (max-width: 876px) {
  .button-subheader {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .button-subheader .button-sub-btn {
    width: 100%;
    margin: 10px 0;
    height: auto;
    font-size: 1rem;
  }
}