* {
  box-sizing: border-box;
}
.container {
  width: 100%;
  padding-right: var(--bs-gutter-x, 0.75rem);
  padding-left: var(--bs-gutter-x, 0.75rem);
  margin-right: auto;
  margin-left: auto;
}
.mt-3 {
  margin-top: 1rem !important;
}
.PC_content_area {
  max-width: 1000px;
  padding-top: 40px;
}
.row {
  --bs-gutter-x: 1.5rem;
  --bs-gutter-y: 0;
  display: flex;
  flex-wrap: wrap;
  margin-top: calc(var(--bs-gutter-y) * -1);
  margin-right: calc(var(--bs-gutter-x) * -0.5);
  margin-left: calc(var(--bs-gutter-x) * -0.5);
}
.justify-content-center {
  justify-content: center !important;
  margin: 0 auto;
}
.col-12 {
  flex: 0 0 auto;
  width: 100%;
}
h1 {
  margin-top: 0;
  background-color: #ff7d53;
  font-size: 30px;
  color: white;
  font-weight: normal;
  padding: 20px;
}
.main_title {
  display: inline-block;
  width: 100%;
  margin-bottom: -10px;
  padding: 0;
}
.main_explanation {
  float: right;
  display: inline;
  font-size: 13px;
  width: calc(100% / 2 - 1px);
  margin-bottom: 0px;
  padding: 10px 30px 0 0;
  text-align: right;
}
.main_explanation .emphasis {
  font-size: 150%;
}
h2 {
  background-color: #a48b78;
  font-size: 24px;
  color: white;
  padding: 15px;
  font-weight: normal;
  margin-bottom: 30px;
}
.search_name {
  font-size: 18px;
  padding: 5px 10px;
  color: #333;
  border: 1px solid #aaa;
  border-radius: 0.1rem;
}
.submit_button {
  background-color: #eee;
  color: #000000;
  border: 1px solid #aaa;
  font-size: 16px;
  margin: 0 20px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  border-radius: 0.25rem;
  letter-spacing: 0.5em;
  padding: 4px 1em 4px 1.5em;
}
.accordion_one {
  max-width: 1024px;
  margin: 0 auto;
}
.keyword_search_header {
  background-color: lightgrey;
  font-size: 22px;
  color: black;
  padding: 12px;
  text-align: left;
  position: relative;
  z-index: +1;
  cursor: pointer;
  transition-duration: 0.2s;
  margin-bottom: 28px;
}
.accordion_header {
  background-color: lightgrey;
  font-size: 22px;
  color: black;
  padding: 15px;
  text-align: left;
  position: relative;
  z-index: +1;
  cursor: pointer;
  transition-duration: 0.2s;
}
.b_title {
  color: #000;
  font-size: 20px;
}
.i_box {
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 50%;
  right: 5%;
  width: 30px;
  height: 30px;
  border: 1px solid black;
  margin-top: -15px;
  box-sizing: border-box;
  transform-origin: center center;
  transition-duration: 0.2s;
}
.accordion_inner {
  padding: 30px 30px;
  border-left: 2px solid lightgray;
  border-right: 2px solid lightgray;
  border-bottom: 2px solid lightgray;
  box-sizing: border-box;
}
.box_one {
  height: 100%;
}
h4 {
  background-color: #ffffff;
  font-size: 16px;
  color: #02213a;
  padding: 15px;
  font-weight: bold;
}
.search_chbox {
  margin-top: 0.2em;
  padding: 0.5em;
  margin-bottom: 1em;
}
.iblock {
  display: inline-block;
  padding: 5px 15px 5px 5px;
  margin-bottom: 10px;
  margin-right: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}
.search_chbox input {
  font-size: 18px;
  padding: 4px 10px;
  color: #333;
  background-color: initial;
  cursor: default;
  appearance: auto;
}
.search_btn {
  text-align: center;
}
.conditional_search_button,
.reset_button {
  background-color: #eee;
  border: 1px solid #aaa;
  font-size: 16px;
  margin: 0 20px;
  cursor: pointer;
  letter-spacing: 0.5em;
  padding: 4px 1em 4px 1.5em;
  color: #333;
  border-radius: 0.25rem;
}
.block_topic_list ul,
.block_topic_list_50syllables ul {
  padding-left: 18px;
  line-height: 1.4;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-top: 0;
  margin-bottom: 1rem;
  list-style-type: disc;
  margin-block-start: 1em;
  margin-block-end: 1em;
  margin-inline-start: 0;
  margin-inline-end: 0;
  padding-inline-start: 40px;
}
.block_topic_list ul li {
  list-style-type: disc;
  margin-left: 1.6em;
  line-height: 1.2;
  margin-bottom: 1.5em;
  width: 30%;
  display: list-item;
  text-align: -webkit-match-parent;
}
.block_topic_list ul li a:visited {
  color: #0000ee;
}
.block_topic_list ul li .none {
  pointer-events: none;
  color: #000000;
  text-decoration: none;
}
.block_topic_list_50syllables ul li {
  list-style-type: disc;
  margin-left: 1.6em;
  line-height: 1.2;
  margin-bottom: 1.5em;
  width: 18%;
  display: list-item;
  text-align: -webkit-match-parent;
}
.block_topic_list_50syllables ul li a:visited {
  color: #0000ee;
}
@media all and (max-width: 1000px) {
  .col-lg-10 {
    flex: 0 0 auto;
  }
  h1 {
    display: block;
    text-align: left;
  }
  .search_btn {
    display: flex;
    justify-content: center;
  }
  .main_explanation {
    display: block;
    text-align: left;
    width: 100%;
    padding: 0;
  }
  .block_topic_list ul,
  .block_topic_list_50syllables ul {
    padding-inline-start: 0;
  }
  .block_topic_list ul li {
    width: 40%;
  }
}