html, body {
  font-family: 'Slabo 27px', serif;
  color: #fff;
  padding: 0;
  margin: 0;
  background: #434c50;
}

h1, h2, h3, h4, h5, h6 {
	font-family: "Segoe UI", Arial, sans-serif;
	font-weight: 400;
    color: #808080;
	margin: 10px 0;
}

subtitle {
	font-family: "Segoe UI", Arial, sans-serif;
	font-weight: 100;
    color: #999999;
	margin: 0;
}

* {
  box-sizing: border-box;
}

a {
  color: #fff;
}

.clear {
  clear: both;
  float: none;
  width: 100%;
}

.container {
  max-width: 1200px;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}
.container .gallery a img {
  float: left;
  width: 100%;          /* width: 20%; */
  height: auto;
  border: 2px solid #434c50;
  -webkit-transition: -webkit-transform .15s ease;
  -moz-transition: -moz-transform .15s ease;
  -o-transition: -o-transform .15s ease;
  -ms-transition: -ms-transform .15s ease;
  transition: transform .15s ease;
  position: relative;
}
/* default scale(1.05) */
.container .gallery a:hover img {
  -webkit-transform: scale(1.0); opacity: 0.5;
  -moz-transform: scale(1.0); opacity: 0.5;
  -o-transform: scale(1.0); opacity: 0.5;
  -ms-transform: scale(1.0); opacity: 0.5;
  transform: scale(1.0); opacity: 0.5;
  z-index: 5;
}
.container .gallery a.big img {
  width: 40%;
}

.container .gallery a.small img {
  width: 20%;
}

.container .gallery a.medium img {
  width: 25%;
}

.align-center {
  text-align: center;
}

.button {
  background-color: #666666;
  border: none;
  color: white;
  border-radius: 32px;
  padding: 16px 32px;
  text-align: center;
  font-size: 16px;
  margin: 4px 2px;
  opacity: 0.6;
  transition: 0.3s;
  display: inline-block;
  text-decoration: none;
  cursor: pointer;
}
.button:hover {opacity: 1}