@charset "UTF-8";
html, body {
  background-color: #4e537a;
  margin: 0px 30px 0px 30px;
}

.imgDiv {
  display: block;
  width: 100%;
  max-width: 1200px;
  background-color: #425D70;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 80px;
}

.imgDiv img {
  width: 100%;
}

p {
  font-size: 3rem;
  line-height: 4.5rem;
  color: #e3e7ff;
}

h1, h2, h3, h4 {
  font-weight: normal;
}

h1 {
  text-align: center;
  font-size: 4em;
  color: #b0b5c0;
  margin: 30px 0px 40px 0px;
}

h2, h3 {
  font-size: 3rem;
  line-height: 1.7em;
  color: #e3e7ff;
  margin: 20px 40px 0px 0px;
}

h2 {
  color: #f7ffcc;
}

h2 div {
  display: inline;
  color: #8ce9ff;
}

h3 {
  font-size: 3rem;
}

ul, ol {
  font-size: 3rem;
  line-height: 1.7em;
  color: #e3e7ff;
  margin: 0px 40px 40px 20px;
}

ul.ex span {
  color: #f7ffcc;
}

li.ans {
  color: white;
}

li.ans::after {
  content: " ←";
  color: #f7ffcc;
}

li.exp {
  color: #6dff96;
}

li.exp span {
  color: #b3fdd2;
}

s {
  display: inline-block;
  color: #3a3e5b;
  text-decoration: none;
  white-space: nowrap;
  background: -webkit-gradient(linear, left top, left bottom, from(#4e537a), color-stop(47%, #4e537a), color-stop(47%, #4e537a), color-stop(53%, #4e537a), color-stop(53%, #4e537a), to(#4e537a));
  background: -o-linear-gradient(#4e537a 0%, #4e537a 47%, #4e537a 47%, #4e537a 53%, #4e537a 53%, #4e537a 100%);
  background: linear-gradient(#4e537a 0%, #4e537a 47%, #4e537a 47%, #4e537a 53%, #4e537a 53%, #4e537a 100%);
}

u {
  border-bottom: 3px dotted #8085ae;
  line-height: 1.1em;
}

u > em {
  background-color: #8085ae;
  color: white;
}

u > em:after {
  border-color: transparent transparent #8085ae transparent;
  border-width: 10px;
  margin-left: -10px;
}