html, body {
  margin: 0;
  padding: 0;
  width: 100dvw;
  height: 100dvh;
  overflow: hidden;
}

.container {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  overflow: hidden;
  position: relative;
}

.viewer-navigation {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  border-bottom: 1px solid #cccccc;
  height: 50px;
  background-color: #ffffff;
  display: flex;
}

.viewer-navigation-group {
  margin: 0.5em;
  width: auto;
}

.viewer-navigation-group .button {
  font-size: 0.8em;
  font-family: Arial, Helvetica, sans-serif;
  max-width: 200px;
  border: 1px solid #aaaaaa;
  background: #eeeeee;
  padding: 5px 7px;
}

.viewer-navigation-group .button:active {
  background-color: #aaaaaa;
  opacity: 0.8;
  box-shadow: 1px 1px 1px #aaaaaa;
}

.viewer-navigation-group .button:hover {
  background-color: #aaaaaa;
}

.viewer-container {
  overflow: auto;
  width: 100%;
  height: 100%;
}
.viewer {
  text-align: center;
  padding-top: 50px;
}

.viewer .page {
  border: 1px solid #cccccc;
  margin: 1em auto;
}

#openFile {
  display: none;
}

#scaleOption {
  width: 100px;
  height: 25px;
  background: #ffffff;
  border: 1px solid #dddddd;
  margin: auto;
}