@charset "UTF-8";
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Shippori Mincho", "游明朝", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.header-container {
  display: flex;
  flex-direction: column;
}

.hero {
  position: relative;
  flex: 1;
  background-image: url("../images/hero.jpg");
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.3);
}
.hero-content {
  position: relative;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  text-align: center;
  z-index: 1;
}
.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  margin-top: 1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}
.hero-subtitle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
  font-family: "Shippori Mincho", "游明朝", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
}
.hero-subtitle img {
  width: 90px;
}
@media (min-width: 768px) {
  .hero-subtitle {
    gap: 2rem;
    flex-direction: row;
    align-items: flex-end;
  }
  .hero-subtitle .subtitle {
    width: 120px;
  }
}
.hero-text-vertical {
  position: absolute;
  right: 15%;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-size: 2rem;
  font-weight: 700;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  line-height: 1.8;
}

.logo-sub {
  display: none;
}
@media (min-width: 768px) {
  .logo-sub {
    display: block;
  }
}

.youtube-announcement iframe {
  height: 240px; /* img.subtitle と同じ高さにする */
  aspect-ratio: 16/9; /* 横幅は自動調整 */
  width: auto; /* 明示的に幅を指定したい場合はここに px か % を */
}
@media (min-width: 768px) {
  .youtube-announcement iframe {
    height: 420px; /* img.subtitle と同じ高さにする */
  }
}

.gallery {
  background-color: #0052cc;
  padding: 1rem 0;
  overflow: hidden;
}
.gallery-container {
  width: 100%;
  overflow: hidden;
}
.gallery-track {
  display: flex;
  gap: 0.5rem;
  padding: 0 0.5rem;
  -webkit-animation: scroll 50s linear infinite;
          animation: scroll 50s linear infinite;
  width: -webkit-fit-content;
  width: -moz-fit-content;
  width: fit-content;
}
.gallery-track:hover {
  -webkit-animation-play-state: paused;
          animation-play-state: paused;
}
.gallery-item {
  flex: 0 0 auto;
  width: 160px;
  height: 120px;
  overflow: hidden;
  border-radius: 4px;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  transition: transform 0.3s ease;
}
.gallery-item img:hover {
  transform: scale(1.05);
}

@-webkit-keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(calc(-800px - 2.5rem));
  }
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(calc(-800px - 2.5rem));
  }
}
.navigation {
  display: flex;
  background: linear-gradient(to right, #0052cc, #003399);
  color: #fff;
}
.navigation .nav-item {
  flex: 1;
  text-align: center;
  padding: 1rem;
  font-size: 1.25rem;
  font-weight: 700;
  position: relative;
  font-family: "Shippori Mincho", "游明朝", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
}
.navigation .nav-item:first-child {
  background-color: #1728c0;
}
.navigation .nav-item:last-child {
  background-color: #00bfff;
}
.navigation .nav-item a {
  display: block;
  transition: transform 0.2s ease;
}
.navigation .nav-item a:hover {
  transform: scale(1.05);
}

.nav-item-middle {
  position: absolute;
  top: 0;
  right: 90%;
  width: 20%;
  height: 100%;
  background-color: #00bfff;
}
.nav-item-middle::before {
  content: "";
  position: absolute;
  top: 0;
  left: -1px;
  width: 100%;
  height: 100%;
  background-color: #1728c0;
  -webkit-clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
          clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
}

.broadcast-date {
  font-size: 1.3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
}

.broadcast-date-wrap .broadcast-date-pc {
  max-width: 800px;
  margin-bottom: 20px;
  display: none;
}
@media screen and (min-width: 768px) {
  .broadcast-date-wrap .broadcast-date-pc {
    display: block;
  }
}
.broadcast-date-wrap .broadcast-date-sp {
  max-width: 280px;
  margin-bottom: 10px;
}
@media screen and (min-width: 768px) {
  .broadcast-date-wrap .broadcast-date-sp {
    display: none;
  }
}

.broadcast-content {
  margin-top: 20px;
  padding: 0 15px;
  background-color: black;
  opacity: 0.8;
}
.broadcast-content p {
  font-size: 14px;
  line-height: 1.2;
  margin-bottom: 1em;
  text-align: justify;
}
.broadcast-content p:last-child {
  margin-bottom: 0;
}
@media screen and (min-width: 768px) {
  .broadcast-content {
    margin-top: 30px;
    padding: 0 30px;
  }
  .broadcast-content p {
    font-size: 16px;
  }
}

.overview {
  padding: 4rem 2rem;
  background-color: #f5f5f5;
  position: relative;
  overflow: hidden;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}
.overview::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("../images/content-bg.jpg?v=2");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.4;
  z-index: 0;
}
.overview h2 {
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}
.overview-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  line-height: 2;
  font-family: "Shippori Mincho", "游明朝", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", serif;
  font-size: 1.125rem;
}
.overview-content p {
  margin-bottom: 1rem;
  font-feature-settings: "palt";
  letter-spacing: 0.05em;
  font-weight: 500;
}

.background-container-left-bottom {
  z-index: 0;
  width: 50%;
  height: 40px;
  left: 0;
  bottom: -1px !important;
  background-color: #1728c0;
  position: absolute;
  -webkit-clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
          clip-path: polygon(0% 0%, 0% 100%, 100% 100%);
}
.background-container-left-top {
  width: 50%;
  height: 40px;
  left: 0;
  top: 0px !important;
  background-color: #1728c0;
  position: absolute;
  -webkit-clip-path: polygon(0% 0%, 0% 100%, 100% 0%);
          clip-path: polygon(0% 0%, 0% 100%, 100% 0%);
}
.background-container-right-bottom {
  bottom: -1px !important;
  position: absolute;
  right: 0;
  width: 50%;
  height: 40px;
  background-color: #00bfff;
  -webkit-clip-path: polygon(0% 100%, 100% 100%, 100% 0%);
          clip-path: polygon(0% 100%, 100% 100%, 100% 0%);
}
.background-container-right-top {
  position: absolute;
  top: 0px;
  right: 0;
  width: 50%;
  height: 40px;
  background-color: #00bfff;
  -webkit-clip-path: polygon(0% 0%, 100% 100%, 100% 0%);
          clip-path: polygon(0% 0%, 100% 100%, 100% 0%);
}

.broadcasts {
  padding: 4rem 2rem;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.broadcasts::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("../images/broadcast-bg.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}
.broadcasts h2 {
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}
.broadcasts .video-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.broadcasts .video-container .video {
  position: relative;
  width: 100%;
  margin-bottom: 2rem;
}
.broadcasts .video-container .video .video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
.broadcasts .video-container .video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  z-index: 2;
}

footer {
  background-color: #000;
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
}
footer .footer-nav {
  margin-bottom: 1.5rem;
  font-size: 1rem;
}
footer .social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
footer .social-links .social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #fff;
  transition: transform 0.2s ease;
}
footer .social-links .social-icon:hover {
  transform: scale(1.1);
}
footer .social-links .social-icon img {
  width: 24px;
  height: 24px;
}
footer .rsk-logo {
  margin: 2rem auto;
  width: 120px;
  height: auto;
}
footer .rsk-logo img {
  width: 100%;
  height: auto;
}
@media (min-width: 768px) {
  footer .rsk-logo {
    width: 150px;
  }
}
footer .copyright {
  font-size: 0.8rem;
  opacity: 0.8;
}

.wave-divider {
  height: 150px;
  width: 100%;
  background-color: #0052cc;
  position: relative;
  overflow: hidden;
}
.wave-divider::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100px;
  background-color: #f5f5f5;
  -webkit-clip-path: polygon(0 100%, 100% 100%, 100% 0, 0 100%);
          clip-path: polygon(0 100%, 100% 100%, 100% 0, 0 100%);
}

.back-to-top {
  position: fixed;
  width: 40px;
  height: 40px;
  right: 15px;
  bottom: 15px;
  background-color: rgba(0, 82, 204, 0.9);
  color: #fff;
  border-radius: 50%;
  display: none;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 1000;
  font-size: 0.9rem;
}
.back-to-top:hover {
  background-color: rgba(0, 51, 153, 0.9);
  transform: translateY(-3px);
}
.back-to-top.show {
  display: flex;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  .hero-subtitle {
    justify-content: center;
    gap: 2rem;
  }
  .hero-subtitle img {
    width: 120px;
  }
  .hero-subtitle img {
    width: 120px;
  }
  .hero-subtitle .broadcast-date {
    width: auto;
    text-align: left;
  }
  .hero-subtitle .broadcast-date .date-label {
    font-size: 2rem;
  }
  .hero-subtitle .broadcast-date .date-value {
    font-size: 2rem;
  }
  .gallery-item {
    width: 240px;
    height: 180px;
  }
  .background-container-left-bottom {
    height: 80px;
    left: 0;
    bottom: 0;
  }
  .background-container-left-top {
    height: 80px;
    left: 0;
    top: -1px;
  }
  .background-container-right-bottom {
    bottom: 0;
    right: 0;
    height: 80px;
  }
  .background-container-right-top {
    top: -1px;
    right: 0;
    height: 80px;
  }
  .back-to-top {
    width: 50px;
    right: 20px;
    height: 50px;
    bottom: 20px;
  }
  @-webkit-keyframes scroll {
    0% {
      transform: translateX(0);
    }
    100% {
      transform: translateX(calc(-240px * 5 - 0.5rem * 5));
    }
  }
  @keyframes scroll {
    0% {
      transform: translateX(0);
    }
    100% {
      transform: translateX(calc(-240px * 5 - 0.5rem * 5));
    }
  }
}
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  z-index: 2000;
}
.modal.show {
  display: block;
}
.modal-content {
  position: relative;
  width: 90%;
  max-width: 1200px;
  margin: 2% auto;
  height: 90vh;
}
.modal-video-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
}
.modal-video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}
.modal .close-modal {
  position: absolute;
  top: -40px;
  right: 0;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  transition: transform 0.3s ease;
}
.modal .close-modal:hover {
  transform: scale(1.1);
}

.video-wrapper {
  cursor: pointer;
  transition: transform 0.3s ease;
}
.video-wrapper:hover {
  transform: scale(1.02);
}
.video-wrapper::after {
  content: "クリックで拡大";
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.video-wrapper:hover::after {
  opacity: 1;
}
/*# sourceMappingURL=style.css.map */