.slider {
  margin: 0 auto;
  max-width: 100%;
}

.slider img {
  width: 100%;
}

.slide_viewer {
  height: 640px;
  overflow: hidden;
  position: relative;
}

.slide_group {
  height: 100%;
  position: relative;
  width: 100%;
}

.slide {
  display: none;
  height: 100%;
  position: absolute;
  width: 100%;
}

.slide:first-child {
  display: block;
}



.slide_buttons {
  left: 0;
  right: 0;
  text-align: center;
}


@media(max-width: 975px) {
  .slide_buttons {
    display: none;
  }
}
@media(max-width: 755px) {
  .directional_nav {
    display: none;
  }
}

a.slide_btn {
  color: #474544;
  font-size: 42px;
  margin: 0 0.175em;
  -webkit-transition: all 0.4s ease-in-out;
  -moz-transition: all 0.4s ease-in-out;
  -ms-transition: all 0.4s ease-in-out;
  -o-transition: all 0.4s ease-in-out;
  transition: all 0.4s ease-in-out;
}

.slide_btn.active, .slide_btn:hover {
  color: #428CC6;
  cursor: pointer;
}

.directional_nav {
  height: 300px;
  margin: 0px auto;
  max-width: 100%;
  position: absolute;
  top: 50%;
}

.previous_btn {
  bottom: 0;
  left: 100px;
  margin: auto;
  position: absolute;
  top: 0;
}

.next_btn {
  bottom: 0;
  margin: auto;
  position: absolute;
  right: 100px;
  top: 0;
}

.previous_btn, .next_btn {
  cursor: pointer;
  height: 65px;
  opacity: 0.5;
  -webkit-transition: opacity 0.4s ease-in-out;
  -moz-transition: opacity 0.4s ease-in-out;
  -ms-transition: opacity 0.4s ease-in-out;
  -o-transition: opacity 0.4s ease-in-out;
  transition: opacity 0.4s ease-in-out;
  width: 65px;
}

.previous_btn:hover, .next_btn:hover {
  opacity: 1;
}

@media only screen and (max-width: 767px) {
  .previous_btn {
    left: 50px;
  }
  .next_btn {
    right: 50px;
  }
}

.minimized {
  width: 300px;
  cursor: pointer;
  border: 1px solid #FFF;
}
.minimized:hover {
  border: 2px solid #385087;
}
/* увеличенная картинка */
#magnify {
  display: none;
  /* position: absolute; upd: 24.10.2016 */
  position: fixed;
  max-width: 930px;
  height: auto;
  z-index: 9999;
}

#magnify img {
  width: 100%;
}
/* затемняющий фон */
#overlay {
  display: none;
  background: #000;
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  opacity: 0.5;
  z-index: 9990;
}
/* кнопка закрытия */
#close-popup {
  width: 30px;
  height: 30px;
  border-radius: 15px;
  cursor: pointer;
  position: absolute;
  top: 15px;
  right: 15px;
}
#close-popup i {
  width: 30px;
  height: 30px;
  background: url(https://codernote.ru/files/cross.png) no-repeat center center;
  background-size: 16px 16px;
  display: block;
}
@keyframes rota {
  25% { transform: rotate(360deg); }
}
#close-popup:hover {
  animation: rota 4s infinite normal;
  -webkit-animation-iteration-count: 1;
  animation-iteration-count: 1;
}