* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #111;
  font-family: sans-serif;
  overflow: hidden;
}

.toolbar {
  position: fixed;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 999;
}

.toolbar button {
  background: #000;
  color: #fff;
  border: 1px solid #444;
  padding: 8px 14px;
  margin: 0 3px;
  cursor: pointer;
}

.container {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

#flipbook {
  box-shadow: 0 20px 50px rgba(0,0,0,.7);
}

.page {
  background: #000;
}

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