<div class="accordion">
  <div class="img-container">
    <img src="https://i.imgur.com/XJtqz1w.png" />
    <div class="cover">
      <div>Wing Zero</div>
    </div>
    <div class="caption">
      <div>XXXG-00W0</div>
      <div>Wing Gundam Zero</div>
      <div>ウイングゲンダムゼロ</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/ZaXl3Uo.png" />
    <div class="cover">
      <div>Deathscythe Hell</div>
    </div>
    <div class="caption">
      <div>XXXG-01D2</div>
      <div>Gundam Deathscythe Hell</div>
      <div>ガンダムデスサイズヘル</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/HPv0jNp.png" />
    <div class="cover">
      <div>Heavy Arms Custom</div>
    </div>
    <div class="caption">
      <div>XXXG-01H2</div>
      <div>Gundam Heavy Arms Custom</div>
      <div>ガンダムヘビーアームズ</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/S7FPurl.png" />
    <div class="cover">
      <div>Sandrock Custom</div>
    </div>
    <div class="caption">
      <div>XXXG-01SR2</div>
      <div>Gundam Sandrock Custom</div>
      <div>ガンダムサンドロック</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/maoEY9X.png" />
    <div class="cover">
      <div>Altron</div>
    </div>
    <div class="caption">
      <div>XXXG-01S2</div>
      <div>Altron Gundam</div>
      <div>アルトロンガンダム</div>
    </div>
  </div>
</div>

<div class="centered">
  <div class="title">Know Your Gundam</div>
</div>

<div class="accordion">
  <div class="img-container">
    <img src="https://i.imgur.com/BD4hNXZ.png" />
    <div class="cover">
      <div>Wing Zero Custom</div>
    </div>
    <div class="caption">
      <div>XXXG-00W0</div>
      <div>Wing Gundam Zero Custom</div>
      <div>ウイングゲンダムゼロ</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/iVH1nNi.png" />
    <div class="cover">
      <div>Deathscythe Hell</div>
    </div>
    <div class="caption">
      <div>XXXG-01D2</div>
      <div>Gundam Deathscythe Hell (EW)</div>
      <div>ガンダムデスサイズヘル</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/mc0sH1I.png" />
    <div class="cover">
      <div>Heavy Arms Custom</div>
    </div>
    <div class="caption">
      <div>XXXG-01H2</div>
      <div>Gundam Heavy Arms Custom (EW)</div>
      <div>ガンダムヘビーアームズ</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/c48Dd1v.png" />
    <div class="cover">
      <div>Sandrock Custom</div>
    </div>
    <div class="caption">
      <div>XXXG-01SR2</div>
      <div>Gundam Sandrock Custom (EW)</div>
      <div>ガンダムサンドロック</div>
    </div>
  </div>
  <div class="img-container">
    <img src="https://i.imgur.com/YxovOi4.png" />
    <div class="cover">
      <div>Altron</div>
    </div>
    <div class="caption">
      <div>XXXG-01S2</div>
      <div>Altron Gundam EW Version</div>
      <div>アルトロンガンダム</div>
    </div>
  </div>
</div>

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&display=swap');

body, html {
  font-family: Arial, Helvetica, sans-serif;
  padding: 0;
  margin: 0;
  background-color: #333333;
  --app-margin: 14px;
  --app-accorion-height: 400px;
}

.spacer {
  height: 24px;
}

.centered {
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: auto;
}

.wrapper {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  max-width: 1200px;
  margin: auto;
}

/*----- accordion ------*/

.accordion {
  max-width: 600px;
  width: 100%;
  height: var(--app-accorion-height);
  border: 1px solid;
  margin: auto;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-evenly;
  background-color: rgba(255, 255, 255, 0.2);
}

.accordion .img-container {
  border-right: 1px solid;
  flex: 1;
  flex-grow: 1;
  width: 100%;
  height: auto;
  overflow: hidden;
  position: relative;
  transition: flex-grow 0.3s ease-in-out;
}

.accordion .img-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.accordion .img-container:last-child {
  border-right: none;
}

.accordion .img-container:hover {
  flex-grow: 4;
  cursor: pointer;
}

/*----- transitions ------*/

.accordion .img-container:hover .cover {
  top: 0;
}

.accordion .img-container:hover .caption {
  top: 73%;
}

/*----- accordion cover ------*/

.cover {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0) 0%,
    rgba(0,0,0,0.7) 100%
  );
  position: absolute;
  top: var(--app-accorion-height);
  transition: top 0.3s ease-in-out;
}

.cover div {
  font-family: 'Bebas Neue', Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  color: rgba(255, 255, 255, 0.2);
  text-shadow: 0 4px 6px rgba(255, 255, 255, 0.2);
  font-size: 45px;
  width: 100%;
  text-align: right;
  position: absolute;
  writing-mode: vertical-rl;
  text-orientation: sideways-right;
  overflow: hidden;
  word-wrap: none;
  padding-top: 14px;
}

/*----- text caption------*/

.caption {
  height: 50%;
  position: absolute;
  top: var(--app-accorion-height);
  color: #ffffff;
  padding: 16px;
  transition: top 0.4s ease-in-out 0.3s;
}

.caption div {
  font-family: 'Bebas Neue', Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  line-height: 25px;
}

.caption div:first-child {
  font-size: 40px;
}

.caption div:nth-child(2) {
  font-size: 18px;
  border-bottom: 1px solid #ffffff;
}

.caption div:nth-child(3) {
  letter-spacing: -3px;
}

.font-test {
  font-family: 'Bebas Neue', Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  padding: 0px;
}

/*----- page title------*/

.title {
  font-family: 'Bebas Neue', Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  font-size: 80px;
  line-height: 80px;
  color: #ffffff;
  font-weight: normal;
  text-align: center;
  padding: 16px 0 10px 0;
}