body {
    background-color: #000;
    font-family: 'Source Sans Pro', sans-serif;
    margin: 0;
    color: #000;
    overflow: hidden;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}

a {
    color: orange;
    text-decoration: none;
}

i {
    color: #fff;
}

strong {
    color: #ff0;
}

#title {
    position: absolute;
    left: 0px;
    width: 100%;
    top: 8px;
    text-align: center;
    z-index: 10;
    font-size: 2.0em;
    color: #0f0;
    pointer-events: none;
}

#planet_selector {
    position: absolute;
    left: 0;
    width: 100%;
    height: 100px;
    bottom: 0;
    background-color: #000;
    text-align: center;
}

#planet_selector_description {
    position: absolute;
    left: 0;
    width: 100%;
    height: 32px;
    top: 0px;
    color: #ff0;
    background-color: #000;
    text-align: center;
    font-size: 1.2em;
}

#planet_selector a {
    color: #ff0;
}

#about_box_icon {
  position: absolute;
  right: 8px;
  top: 8px;
  overflow: hidden;
  z-index: 1900;
}

#about_box_bkg {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  overflow: hidden;
  z-index: 1900;
  background-color: rgba(100,100,100,0.7);
  pointer-events:none;
}

#about_box {
  width: 500px;
  height: 500px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -250px;
  margin-top: -250px;
  overflow: hidden;
  padding: 18px;
  color: #fff;
  text-align: justify;
  z-index: 2000;
  background-color: rgba(100,100,100,0.9);
  border-radius: 16px;
  font-size: 0.70em;
  border: #999 4px solid;
  pointer-events:none;
}

.help_contents {
  position: absolute;
  top: 64px;
  left: 16px;
  right: 16px;
  bottom: 16px;
  font-size: 2.0em;
  z-index: 4010;
}

.mouse_off {
  pointer-events:all;
}

.mouse_off {
  pointer-events:none;
}

.hide {
  opacity: 0;
  transition: opacity .5s ease-out;
}

.show {
  opacity: 1;
  transition: opacity .5s ease-out;
}