@charset "UTF-8";
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap");

:root {
  --primary-white: #ffffff;
  --primary-grey: #f4f4f4;
  --primary-black: #222222;
  --regular: 400;
  --medium: 500;
  --bold: 700;
  --content-width: 800px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-padding-top: 30px;
  scroll-behavior: smooth;
}
body {
  font-family: "Poppins", "Noto Sans JP", sans-serif;
  font-size: 18px;
  font-weight: var(--medium);
  line-height: 1.5;
  letter-spacing: 0.04em;
  background-color: #fafffe;
}
body.active {
  height: 100vh;
  overflow: hidden;
}
ul,
ol {
  list-style-type: none;
}
h1,
h2,
h3,
h4 {
  font-size: 1rem;
  font-weight: normal;
}
a {
  color: var(--primary-black);
  text-decoration: none;
}
a,
a::before,
a::after,
a:hover,
a:hover:before,
a:hover:after {
  transition: all 0.5s ease;
}
a:hover {
  opacity: 0.8;
}
p {
  line-height: 2;
  word-break: auto-phrase;
}
p + p {
  margin-top: 2em;
}
img {
  width: 100%;
  height: auto;
  vertical-align: bottom;
}
section {
  padding: 30px 0;
  margin: auto;
}

.pc {
  display: block;
}
.sp {
  display: none;
}
.wrapper {
  width: var(--content-width);
  max-width: 100%;
  background-color: #092168;
  color: var(--primary-white);
  margin: 50px auto 100px;
  border-radius: 30px;
  box-shadow: 0 0 15px #00000026;
}
.sec-inner {
  margin: 0 30px;
}
.sec-title {
  font-size: 28px;
  font-weight: var(--bold);
  text-align: center;
}
.sec-title::after {
  content: "";
  display: block;
  width: 30px;
  height: 5px;
  background: linear-gradient(280.21deg, #4f6dc5 34.22%, #4de1b5 70.89%);
  margin: 6px auto;
}
.sec-title-text {
  text-align: center;
  line-height: 2;
  margin-bottom: 30px;
}
.back-link {
  text-align: right;
  margin: 16px 30px;
}
.first-view {
  padding-top: 23px;
  padding: 30px 30px 0;
}
.fv-logo {
  width: 203px;
  margin: 0 auto 15px;
}
.fv-title {
  margin-top: 40px;
}
.fv-text {
  margin-top: 40px;
  text-align: left;
  font-weight: var(--medium);
  font-size: 18px;
  line-height: 200%;
  letter-spacing: 0.04em;
}
.youtube-description {
  font-weight: var(--medium);
}
.youtube-content {
  background: linear-gradient(90deg, #212121, var(--primary-black));
  border-radius: 8px;
  padding: 40px 54px;
}
.sec-youtube a {
  display: inline-block;
  border-radius: 10px;
  background-color: var(--primary-white);
  font-size: 18px;
  padding: 20px;
}
.youtube-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}
.youtube-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.youtube-details {
  font-size: 18px;
  line-height: 200%;
  letter-spacing: 4%;
}
.youtube-details {
  padding-top: 60px;
}
.youtube-details h3 {
  font-size: 18px;
  margin-left: -0.5em;
}
.profile-group {
  margin-top: 60px;
}
.sec-related {
  color: var(--primary-black);
}
.sec-related .sec-inner {
  background-color: var(--primary-grey);
  border-radius: 8px;
  padding: 20px;
}
.related-item {
  margin-top: 40px;
  font-size: 14px;
  line-height: 2;
  background-color: var(--primary-white);
  padding: 16px;
  border-radius: 8px;
  display: flex;
  gap: 16px;
  align-items: center;
}
.related-item > img {
  width: 240px;
  display: inline-block;
}
.related-item__info {
  flex: 1;
}
.related-item__info h3 {
  font-size: 14px;
  font-weight: var(--bold);
}
.related-item__info .related-item__button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background-color: var(--primary-black);
  color: var(--primary-white);
  border-radius: 8px;
  text-decoration: none;
  font-weight: normal;
  font-size: 14px;
  gap: 8px;
  padding: 9.5px 0;
  box-sizing: border-box;
  text-align: center;
  line-height: 0;
  margin-top: 16px;
}

.related-item__info .related-item__button .button-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0; /* アイコンが縮まないように */
}
.footer {
  padding: 30px;
}
.footer-logo {
  width: 305px;
  margin: 0 auto 30px;
}

@media screen and (max-width: 800px) {
  .pc {
    display: none;
  }
  .sp {
    display: block;
  }
  .wrapper {
    border-radius: 0;
    margin: 0;
  }
  .fv-title {
    margin-top: 24px;
  }
  .fv-text {
    margin-top: 24px;
    font-size: 14px;
    line-height: 150%;
    letter-spacing: 0.2em;
    font-weight: var(--regular);
  }
  .sec-inner {
    margin: 0 30px;
  }
  .sec-title {
    font-size: 18px;
  }
  .sec-title-text {
    font-size: 14px;
    font-weight: normal;
  }
  .youtube-content {
    padding: 40px 16px;
  }
  .youtube-details {
    font-size: 14px;
  }
  .youtube-details h3 {
    font-size: 14px;
  }
  .youtube-description {
    font-weight: var(--regular);
  }
  .profile-group {
    margin-top: 60px;
  }
  @media screen and (max-width: 800px) {
    .related-item {
      flex-direction: column;
      align-items: flex-start;
    }
    .related-item > img {
      display: block;
      margin: 0 auto;
    }
    .related-item__info {
      width: 100%;
    }
    .related-item__info h3 {
      font-weight: normal;
    }
  }
}