.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--loader-bg-color, #fff);
  z-index: 99;
  transition: opacity var(--transition-duration, .25s) ease, visibility var(--transition-duration, .25s) ease;
}

.loader.loaded {
  opacity: 0;
  visibility: hidden;
}

.loader::before,
.loader::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50px;
  height: 50px;
  background-color: var(--loader-color, var(--primary-color));
  border-radius: 50%;
  opacity: 0;
  transform: translate(-50%, -50%);
}

.loader::before {
  animation: page-loader 1.5s infinite;
}

.loader::after {
  animation: page-loader 1.5s infinite .75s;
}

@keyframes page-loader {
  from {
    transform: translate(-50%, -50%) scale(0);
    opacity: 1;
  }
  to {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
  }
}

.header {
  position: var(--header-position, absolute);
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height, 100px);
  z-index: 9;
}

.header .content {
  height: var(--header-height, 100px);
}

.header .nav a {
  white-space: nowrap;
}

.header .hamburger {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: var(--hamburger-size, var(--hamburger-width, 30px));
  height: var(--hamburger-size, var(--hamburger-height, 30px));
  cursor: pointer;
}

.header .hamburger span {
  display: block;
  width: 100%;
  height: var(--hamburger-lines-height, 3px);
  background-color: var(--hamburger-lines-color, var(--white-color, #fff));
}

.header .backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,.8);
  opacity: 0;
  visibility: hidden;
  z-index: 1;
  transition: opacity var(--transition-duration, 0s) ease, visibility var(--transition-duration, 0s) ease;
}

.header .backdrop.visible {
  opacity: 1;
  visibility: visible;
}

@media (min-width: 992px) {
  .backdrop,
  .hamburger-wrap {
    display: none;
  }
}

@media (max-width: 991px) {
  .header {
    --nav-color: var(--black-color, #000);
  }
  .header .btn-wrap {
    display: none;
  }
  .header .nav {
    position: fixed;
    flex-direction: column;
    align-items: flex-start;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--mobile-nav-bg-color, var(--white-color, #fff));
    padding: 30px;
    z-index: 1;
    opacity: 0;
    transform: translateX(100%);
    transition: opacity var(--transition-duration, 0s) ease, transform var(--transition-duration, 0s) ease;
  }
  .header .nav.visible {
    opacity: 1;
    transform: translateX(0);
  }
  .header .nav .d-flex {
    flex-direction: column;
  }
  .header .nav .close-nav {
    position: relative;
    width: var(--hamburger-width, 30px);
    height: var(--hamburger-height, 30px);
    cursor: pointer;
  }
  .header .nav .close-nav::before,
  .header .nav .close-nav::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: var(--hamburger-lines-height, 3px);
    background-color: var(--mobile-nav-link-color, var(--black-color, #000));
  }
  .header .nav .close-nav::before {
    transform: translate(-50%, -50%) rotate(45deg);
  }
  .header .nav .close-nav::after {
    transform: translate(-50%, -50%) rotate(-45deg);
  }
  .header .nav li.d-none {
    display: block;
  }
}