/* Homepage header */

.masthead {
  min-height: 30rem;
  position: relative;
  display: table;
  width: 100%;
  height: auto;
  padding-top: 8rem;
  padding-bottom: 8rem;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.1) 100%), url("../images/backgrounds/intro-bg.jpg");
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;

  /* Create the parallax scrolling effect */
  background-attachment: fixed;
}

/* Overlay */
.mask {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-attachment: fixed
}

header.masthead .masthead-content {
    z-index: 1;
    position: relative;
  }

  @media only screen and (max-device-width: 1366px) {
    .masthead {
      background-attachment: scroll;
    }
  }
  
  @media (min-width: 992px) {
    header.masthead {
      padding-top: calc(10rem + 55px);
      padding-bottom: 10rem;
    }
  }

/* Animated Button */

  .animated-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    line-height: 80px;
    display: inline-block;
    text-align: center;
    background: #325C77;
    position: relative;
}

.animated-btn::before, .animated-btn::after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    border-radius: 50%;
    background: rgba(50, 92, 119, 0.8);
    animation: ripple-1 2s infinite ease-in-out;
    z-index: -1;
}

.animated-btn::after {
    background: rgba(50, 92, 119, 0.6);
    animation: ripple-2 2s infinite ease-in-out;
    animation-delay: 0.5s;
}

@keyframes ripple-1 {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

@keyframes ripple-2 {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    100% {
        transform: scale(1.7);
        opacity: 0;
    }
}