html {
  overflow-x: hidden;
}

.header {
  background: #9b001e;
  font-family: "Kaisei Opti";
}
main {
  background-image: url(../img/on-air__back.svg);
}
.header-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  padding: 14px 28px;
  position: relative;
  z-index: 10;
  font-family: "Kaisei Opti";
}

.header-wrap__ttl {
  width: 300px;
  height: auto;
}

.header-wrap__ttl img {
  display: block;
  width: 100%;
  height: auto;
}
.header__small {
  display: inline;
}

.header-wrap__center {
  position: absolute;
  top: 84%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.header-wrap__center img {
  display: block;
  width: 100%;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-right__txt p {
  color: #fff;
  font-size: 15px;
  line-height: 1.4;
  white-space: nowrap;
}

/* ハンバーガー基準親 */
.hamburger-menu {
  position: relative;
  width: 50px;
  height: 50px;
  flex-shrink: 0;
}

/* ボタン */
.hamburger {
  position: relative;
  top: auto;
  right: auto;
  width: 50px;
  height: 50px;
  background-color: #9b001e;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  z-index: 1002;
}

.hamburger span {
  position: absolute;
  width: 28px;
  height: 1px;
  background: #ffffff;
  border-radius: 999px;
  left: 50%;
  transition:
    transform 0.5s,
    opacity 0.5s;
}

.hamburger span:nth-child(1) {
  top: 50%;
  transform: translate(-50%, -9px);
}

.hamburger span:nth-child(2) {
  top: 50%;
  transform: translate(-50%, 0);
}

.hamburger span:nth-child(3) {
  top: 50%;
  transform: translate(-50%, 9px);
}

@-webkit-keyframes active-btn06-bar02 {
  100% {
    height: 0;
  }
}

@keyframes active-btn06-bar02 {
  100% {
    height: 0;
  }
}

.hamburger.active {
  background-color: transparent;
  box-shadow: none;
}

.hamburger.active span {
  background: #fff;
  height: 2px;
}

.hamburger.active span:nth-child(1) {
  transform: translate(-50%, 0) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
  left: 200%;
  transform: translate(-50%, 0);
  -webkit-animation: active-btn06-bar02 0.8s forwards;
  animation: active-btn06-bar02 0.8s forwards;
}

.hamburger.active span:nth-child(3) {
  transform: translate(-50%, 0) rotate(-45deg);
}

/* スライドメニュー本体 */
.hamburger-menu-wrap {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100vh;
  margin: 0 auto;
  padding: 10px;
  background: #9b001e;
  transition: right 0.6s ease;
  z-index: 1000;
  max-width: 550px;
  box-sizing: border-box;
}

.hamburger-menu-wrap.active {
  right: 0;
}

.hamburger-menu-wrap__inner {
  height: 100%;
  border: 2px dashed rgba(255, 255, 255, 0.85);
  padding: 70px 20px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-sizing: border-box;
  font-family: "Kaisei Opti";
}

.hamburger-menu-wrap__inner__nav {
  width: 100%;
}

.hamburger-menu-wrap__inner__nav__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 34px;
}

.hamburger-menu-wrap__inner__nav__list__item a {
  color: #fff;
  font-size: 32px;
  line-height: 1.3;
  font-weight: 400;
  text-decoration: none;
}

.hamburger-menu-wrap__bland {
  margin-top: auto;
  padding-top: 40px;
  text-align: center;
}

.hamburger-menu-wrap__bland img {
  width: 72%;
  margin: 0 auto;
  display: block;
}

.hamburger-menu-wrap__onair {
  margin-top: 24px;
  margin-bottom: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  background: #fff;
  border-radius: 999px;
  color: #9b001e;
  font-size: 14px;
  text-align: center;
  text-decoration: none;
  width: 88%;
  max-width: 300px;
  font-weight: 400;
}
.top {
  background-image: url(../img/background.svg);
  background-repeat: no-repeat;
  background-size: cover;
}
.top-wrap__ttl {
  font-family: "Kaisei Opti";
  letter-spacing: 0.1rem;
  color: #9b001e;
  padding-top: 100px;
  text-align: center;
}
.top-wrap__ttl h3 {
  font-size: 60px;
}
.top-wrap__head {
  font-family: "Kaisei Opti";
  text-align: center;
  padding-bottom: 230px;
}
.top-wrap__head p {
  margin-top: 40px;
}
.top-wrap__head h5 {
  margin-top: 20px;
  font-size: 32px;
}
.article {
  background-repeat: no-repeat;
  background-size: cover;
  padding-bottom: 100px;
}
.article-wrap {
  background-color: #fff;
  margin: -130px auto 0 auto;
  width: 50%;
  min-width: 784px;
  font-family: "Kaisei Opti";
}
.article-wrap__top {
  text-align: center;
  position: relative;
}
.article-wrap__ribon {
  width: 90px;
  position: absolute;
  top: 2px;
  left: 50%;
  transform: translate(-50%, -50%);
}
.article-wrap__ribon img {
  display: block;
  width: 100%;
  height: auto;
}
.article-wrap__date {
  padding: 50px 0;
}
.article-wrap__img {
  width: 100%;
}

.article-wrap__video {
  width: 95%;
  margin: 0 auto;
  padding: 20px 0 60px 0;
}

.article-wrap__video iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  border: 0;
}
body.menu-open {
  overflow: hidden;
  height: 100vh;
  touch-action: none;
}

@media screen and (max-width: 1280px) {
  .header-wrap__ttl a {
    display: inline-flex;
    align-items: center;
    font-size: 36px;
    flex-direction: column;
    line-height: 1.4;
  }
  .header-wrap__ttl .koko {
    font-size: 18px;
    margin-left: 0;
  }
}
@media screen and (max-width: 820px) {
  .article-wrap {
    width: 95%;
    min-width: auto;
  }
  .header-wrap__ttl {
    width: 200px;
    height: auto;
  }
  .header-right__txt {
    display: none;
  }
  .top-wrap__ttl h3 {
    font-size: clamp(2.625rem, 0.2885rem + 6.9231vw, 3.75rem);
  }
  .top-wrap__head h5 {
    font-size: clamp(1.5rem, 0.4615rem + 3.0769vw, 2rem);
  }
}
@media screen and (max-width: 640px) {
  .header-right__txt {
    display: none;
  }

  .header-wrap {
    grid-template-columns: 1fr auto auto;
  }

  .header-wrap__ttl a {
    font-size: 18px;
  }
  .header-wrap__ttl .koko {
    font-size: 12px;
    margin-left: 0;
  }

  .header-wrap__center {
    width: 100px;
  }

  .hamburger-menu-wrap {
    width: 100vw;
  }
  .top-wrap__ttl {
    padding-top: 60px;
  }
}
@media screen and (max-width: 540px) {
  .header-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    padding: 14px 10px;
  }
  .header-wrap__ttl {
    width: 140px;
    height: auto;
  }
}
@media screen and (max-width: 400px) {
  .header-wrap__center {
    width: 90px;
    margin-top: 25px;
  }
}