@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP&display=swap');

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: #3b3b3b;
}

img {
  max-width: 100%;
}

#contents h2 {
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  color: inherit;
}

div#header {
    position: relative;
  margin-bottom: 4em;
  border-bottom: 1px solid #f1f1f1;
}

#lower .topics-path {
  display: none;
}

.overview {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
}

.overview__cover {
  width: 24%;
  box-sizing: border-box;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.overview__text-group {
  width: 72%;
  padding: 1.45em 0;
}

#contents .overview__title {
  margin-bottom: 1em;
  font-size: clamp(1.5em, 2vw, 2em);
  line-height: 1.5;
}

#contents  .overview__title .overview_num {
  display: inline-block;
  background: #385f9f;
  color: #fff;
  font-size: .75em;
  padding: .4em 1em;
  border-radius: 4px;
  font-weight: 700;
  margin-bottom: 1em;
}

#contents  .overview__title small {
  font-size: 85%;
  margin-top: .5em;
  display: inline-block;
}

#contents .overview__description {
  margin-bottom: 2em;
  font-size: clamp(1.1em, 1.8vw, 1.4em);
}

#contents .overview__period {
  display: flex;
  flex-wrap: wrap;
  font-size: clamp(1.2em, 2vw, 1.45em);
}
#contents .overview__period dt {
  font-weight: 600;
  color: #385f9f;
}
#contents .overview__period dt::after {
  content: "：";
}

#contents .overview__link-button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 42%;
  margin: 3em 0 0 auto;
  padding: 1.3em;
  font-size: clamp(1.3em, 2.2vw, 1.75em);
  font-weight: 600;
  color: #fff;
  background: #385f9f;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.3s, transform 0.1s;
  position: relative;
}

#contents .overview__link-button::after {
    font-family: "FontAwesome";
    content: "\f105";
    font-size: 1.45em;
    font-style: normal;
    font-weight: normal;
    transition: transform 0.3s ease;
}
#contents .overview__link-button:hover::after {
    transform: translateX(4px); /* 矢印が右へスライド */
  }

#contents h3 {
  margin: 2em auto 1em;
  padding: 0;
  font-size: clamp(1.3em, 2vw, 1.6em);
  font-weight: 600;
  border: none;
}

#contents h3::before,
#contents h3::after {
  display: none;
}

#contents .warning {
  margin: 5em auto;
  padding: 0 2em 2em;
  border-top: 1px solid #e10a58;
  border-bottom: 1px solid #e10a58;
}

#contents .warning__subtitle {
  color: #e10a58;
}

#contents .warning__list li {
  margin-bottom: 1em;
  padding-left: 1em;
  text-indent: -1em;
  font-size: clamp(1.1em, 1.5vw, 1.3em);
  line-height: 1.5;
}

#contents .warning__list li::before {
  font-family: "FontAwesome";
  content: "\f111";
  margin-right: 1.5em;
  font-size: 0.4em;
  color: #e10a58;
  vertical-align: middle;
}

#contents .usage__title {
  font-size: clamp(1.5em, 3vw, 2em);
  margin-bottom: 1.5em;
}

#contents .usage__feature {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-bottom: 3em;
}

#contents .usage__feature-media {
  width: 40%;
}

#contents .usage__feature-content {
  width: 56%;
}

#contents .usage__feature-heading {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 1em;
}

#contents .usage__icon {
  width: auto;
  height: 3em;
}

#contents .usage__feature-name {
    width: auto;
    margin-left: 0.5em;
    margin-top: 0; 
    margin-bottom: 0; 
}

#contents .usage__description {
  line-height: 2;
}

.usage__description-icon {
  display: inline-block;
}

#contents .usage__description-icon img {
  height: 1.7em;
  padding: 0 0.3em;
  vertical-align: sub;
}

div#footer {
    padding: 2em 1em;
    background-color: #f8f8f8;
    text-align: center;
    font-size: 0.85em;
    color: #999;
    border-top: 1px solid #e0e0e0;
    margin-top: 6em;
  }
  
  #footer p {
    margin: 0;
    line-height: 1.6;
  }

.note {
  padding: 0 2em;
  display: grid;
  place-content: center;
}
.note p {
  font-size: 2em;
  font-weight: bold;
  color: #14609e;
}



@media screen and (max-width: 768px) {
    div#wrapper { padding-top: 0; }
    div#header { margin-bottom: 3em; }
    .overview {
      flex-direction: column;
    }
  
    #contents .usage__feature {
      flex-direction: column-reverse;
    }
  
    .overview__cover,
    .overview__text-group,
    #contents .usage__feature-media,
    #contents .usage__feature-content {
      width: 100%;
    }
  
    #contents .overview__link-button {
      width: 100%;
      padding: 1.6em;
      margin-top: 2.5em;
    }

    .overview__cover {
        width: 56%;
        margin: 0 auto 2em;
    }
    .overview__text-group {
    width: 100%;
    }
    #contents .warning { margin-top: 3em; }

    #contents .overview__period dt { margin-bottom: .5em; }
    #contents .overview__period dt::after {
      display: none;
    }

    div#footer {
        font-size: 0.75em;
        padding: 1.5em 1em;
    }
  }
  
  @media screen and (max-width: 410px) {
    .overview__cover {
      width: 80%;
    }
  }