@font-face {
  font-family: 'Source Sans Pro';
  src: url('../../../fonts/source/sourceSansPro-bold.woff2') format('woff2'), url('../../../fonts/source/sourceSansPro-bold.woff') format('woff'), url('../../../fonts/source/sourceSansPro-bold.ttf') format('truetype');
  font-weight: bold;
  font-style: normal;
}
@font-face {
  font-family: 'Source Sans Pro';
  src: url('../../../fonts/source/sourceSansPro-regular.woff2') format('woff2'), url('../../../fonts/source/sourceSansPro-regular.woff') format('woff'), url('../../../fonts/source/sourceSansPro-regular.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}
.hide {
  display: none;
}
.absolute_center {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
}
.transform_center {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%) translateY(-50%);
  transform: translate(-50%) translateY(-50%);
}
.unselectable {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
*,
*:before,
*:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 62.5%;
}
body {
  position: relative;
  z-index: 0;
  min-width: 320px;
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 1.6rem;
  line-height: 1.2em;
  background-color: #f0f0f0;
  color: #111;
}
label {
  cursor: pointer;
}
div {
  overflow: hidden;
}
main,
header,
footer {
  display: block;
}
main {
  margin: 30px auto;
  padding: 40px 20px 20px;
  background: #fff;
  box-shadow: 2px 2px rgba(0, 0, 0, 0.15);
}
.wrap_inner {
  max-width: calc(100% - 40px);
  width: 800px;
  margin-left: auto;
  margin-right: auto;
}
table {
  border-collapse: collapse;
}
input {
  position: fixed;
  top: 0;
  left: 0;
  opacity: 0;
  visibility: hidden;
}
.global_sub_header {
  margin-left: 0px;
  margin-right: 0px;
}
h1 {
  margin-bottom: 4px;
  font-size: 6rem;
  line-height: 0.9em;
  text-align: center;
}
.article_date {
  display: block;
  margin-bottom: 40px;
  text-align: center;
  font-size: 2rem;
  line-height: 1.2em;
  color: #999;
}
.article_desc {
  width: 500px;
  max-width: 100%;
  margin: 0 auto 50px;
  text-align: center;
  font-size: 2rem;
  line-height: 1.2em;
}
.article_desc p {
  margin-bottom: 1.2em;
}
.riddles_wrap {
  overflow: visible;
  counter-reset: list;
}
.riddle_wrap {
  position: relative;
  overflow: visible;
  margin-bottom: 30px;
  counter-increment: list;
}
.riddle_wrap.open .riddle_btn::before {
  display: none;
}
.riddle_wrap.open .riddle_btn .riddle_answer {
  display: block;
}
.riddle_wrap .riddle_lbl {
  margin-bottom: 10px;
  padding-right: 40px;
  font-size: 1.6rem;
  line-height: 1.2em;
  font-weight: bold;
}
.riddle_wrap .riddle_lbl::before {
  content: counter(list) ")";
  margin-right: 5px;
}
.riddle_wrap .riddle_btn {
  position: absolute;
  z-index: 3;
  top: -5px;
  right: 0px;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-justify-content: center;
  -ms-justify-content: center;
  justify-content: center;
  -webkit-align-items: center;
  -ms-align-items: center;
  align-items: center;
  padding: 0 10px;
  min-width: 30px;
  height: 30px;
  background: #673AB7;
  border-radius: 3px;
  color: #fff;
  outline: none;
  border: none;
  font-family: inherit;
  font-size: 1.6rem;
  font-weight: bold;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  -webkit-transform: translateX(0);
  transform: translateX(0);
}
.riddle_wrap .riddle_btn::before {
  content: "?";
}
.riddle_wrap .riddle_btn:hover,
.riddle_wrap .riddle_btn:active {
  background: #4d2b89;
}
.riddle_wrap .riddle_answer {
  display: none;
  font-size: 1.4rem;
}
.riddle_wrap .riddle_val {
  padding: 20px;
  overflow: auto;
  background: #2b2b2b;
  color: #bababa;
  font-weight: bold;
}
.riddle_wrap .code_orange {
  color: #cc7832;
}
.riddle_wrap .code_green {
  color: #a5c261;
}
.riddle_wrap .code_blue {
  color: #6897bb;
}
@media all and (max-width: 400px) {
  h1 {
    font-size: 4.5rem;
  }
  main {
    padding: 30px 15px 15px;
  }
  .wrap_inner {
    max-width: calc(100% - 30px);
  }
  .article_date {
    margin-bottom: 30px;
    font-size: 1.8rem;
  }
  .riddle_wrap .riddle_val {
    padding: 15px;
    font-size: 1.4rem;
  }
}