css\galeria3.css

#container {
  text-align: center;
  clear: both;
  height: 2160px;
  width: 960px;
  border-radius: 5px;
  border-style: solid;
  border-color: black;
  border-width: 2px;
  background-color: #82bede;
}

#banner {
  height: 12%;
  width: 100%;
  float: left;
  background-color: #82bede;
}

#banner img {
  width: 100%;
  height: 100%;
}

#navbar {
  height: 2%;
  width: 100%;
  float: left;
  background-color: #355e70;
}

/*menu*/
#menu2 {
  text-align: center;
  margin: 50px 0 50px 0;
}

.topbutton {
  border: none;
  background-color: #98c0cf;
  margin-left: 7px;
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  float: left;
  width: 100px;
  height: 25px;
}

#menu2 ul {
  margin: 0;
  list-style: none;
  display: inline-block;
  white-space: nowrap;
}

#menu2 li {
  display: inline;
}

#menu2 li a {
  display: block;
  margin-top: 6px;
  height: 30px;
  float: left;
  color: #000;
  text-decoration: none;
  font: normal 14px/22px 'latomedium', arial,sans-serif;
  padding: 0 0 0 12px;
  background: url(../img/pro_nine_0a.gif) no-repeat;
}

#menu2 li a b {
  height: 100%;
  float: left;
  display: block;
  background: url(../img/pro_nine_0.gif) right top;
  padding: 0 12px 0 0;
}

#menu2 li a:hover {
  background: url(../img/pro_nine_1a.gif) no-repeat;
}

#menu2 li a:hover b {
  background: url(../img/pro_nine_1.gif) right top;
}

/*galeria*/
body {
  min-height: 100vh;
  display: grid;
  place-content: start center;
  background: linear-gradient(#fff, #aaa, #fff);
}

.container {
  display: flex;
  width: 100%;
  padding: 4% 2%;
  box-sizing: border-box;
  height: 100vh;
}

.box {
  flex: 1;
  overflow: hidden;
  transition: .5s;
  margin: 0 2%;
  box-shadow: 0 20px 30px rgba(0, 0, 0, 0.1);
  line-height: 0;
}

.box > img {
  width: 200%;
  height: calc(100% - 10vh);
  object-fit: cover;
  transition: .5s;
}

.box > span {
  font-size: 1.8vh;
  display: block;
  text-align: center;
  height: 10vh;
  line-height: 2.6;
}

.box:hover {
  flex: 1 1 50%;
}

.box:hover > img {
  width: 100%;
  height: 100%;
}