body {
  background-color: #f00;
  color: #00f;
  margin: 0;
  padding: 0;
  font-family: helvetica, arial, sans-serif;
  font-size: 20pt;
  overflow: hidden; }

::selection {
  background: #ff00ff;
  color: #00ffff; }

img {
  vertical-align: bottom; }

a {
  color: #00f; }

#debug {
  position: absolute;
  z-index: 220; }

#loading {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 255, 0.8);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 120;
  display: flex;
  justify-content: center;
  align-items: center; }

#start {
  width: 100%;
  height: 100%;
  background-color: red;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center; }
  #start .container {
    text-align: center; }
    #start .container .title {
      font-size: 40px;
      padding: 10px;
      width: 583.1px;
      height: 188.7px;
      background-size: contain;
      background-repeat: no-repeat;
      background-image: url("../img/logo.svg"); }

#btn {
  margin-top: 50px;
  border: 2px solid #f0f;
  text-align: center;
  font-size: 20px;
  cursor: pointer;
  border-radius: 50%;
  display: inline-block;
  padding: 50px; }
  #btn:hover {
    background-color: #f0f; }

#about {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 255, 0, 0.8);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 110;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  display: none;
  text-align: center; }
  #about ul, #about li {
    list-style: none;
    padding: 0;
    margin: 20px; }
  #about .title1 {
    font-size: 24pt;
    color: #00f;
    display: block;
    font-weight: bold; }
  #about .container {
    display: inline-block; }
  #about .hosoku {
    margin-top: 20px;
    font-size: 12pt; }
  #about #closeBtn {
    position: absolute;
    right: 11px;
    top: 10px;
    cursor: pointer; }

#aboutBtn {
  position: fixed;
  top: 10px;
  right: 11px;
  z-index: 105;
  cursor: pointer; }