@charset "utf-8";

.opening_session_block {
  margin-bottom: 80px;
}

.opening_session_visual {
  margin-bottom: 35px;
  border-radius: 12px;
  overflow: hidden;
}

.opening_session_visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.opening_session_block .opening_session_intro,
.opening_session_block .opening_session_theme,
.opening_session_block .opening_session_more {
  margin-bottom: 40px;
  line-height: 1.9;
}

.opening_session_intro_panel {
  position: relative;
  margin: 0 0 56px;
  padding: clamp(28px, 3.4vw, 48px) clamp(28px, 4vw, 60px);
  background: linear-gradient(135deg, rgba(219, 232, 255, 0.82) 0%, rgba(231, 240, 255, 0.68) 52%, #ffffff 100%);
  overflow: hidden;
}

.opening_session_intro_panel .opening_session_intro {
  position: relative;
  z-index: 1;
  margin: 0;
  color: #122347;
  line-height: 1.9;
}

.opening_session_intro_label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: clamp(18px, 1.85vw, 26px);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #2b5fc2;
  margin-bottom: clamp(14px, 1.4vw, 20px);
}

.opening_session_intro_label::before {
  content: "";
  flex: 0 0 32px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(43, 95, 194, 0.1) 0%, rgba(43, 95, 194, 0.85) 100%);
}

.opening_session_intro_main {
  max-width: 840px;
  font-size: clamp(16px, 1.4vw, 19px);
  font-weight: 600;
  letter-spacing: 0.02em;
}

@media (max-width: 767px) {
  .opening_session_intro_panel {
    margin: 0 0 25px;
    padding: 24px 20px 28px;
  }

  .opening_session_intro_label {
    gap: 10px;
    letter-spacing: 0.06em;
    font-size: 20px;
  }

  .opening_session_intro_label::before {
    flex-basis: 24px;
  }

  .opening_session_intro_main {
    font-size: 15px;
    font-weight: 600;
  }
}

.opening_session_block .opening_session_intro p + p,
.opening_session_block .opening_session_more p + p {
  margin-top: 1em;
}

.opening_session_block .opening_session_theme {
  font-weight: 700;
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.7;
  color: #101d38;
}

@media (max-width: 1024px) {
  .opening_session_block .opening_session_theme {
    font-size: clamp(15px, 1.8vw, 18px);
  }
}

@media (max-width: 600px) {
  .opening_session_block .opening_session_theme {
    font-size: clamp(14px, 4.5vw, 16px);
    line-height: 1.8;
  }
}

.opening_session_card_content .session_detail_data .session_time.js-session-time-s::after {
  content: "\25B8";
  font-family: inherit;
  font-size: 1.35em;
  color: #1e3f8c;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
}

.opening_session_cards {
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 0;
  list-style: none;
}

.opening_session_card {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-areas: "media content";
  gap: 24px;
  border-radius: 12px;
  background-color: #fff;
  transition: transform 0.25s ease;
  color: inherit;
  text-decoration: none;
}

.opening_session_card:hover,
.opening_session_card:focus {
  transform: translateY(-4px);
}

.opening_session_card_media {
  position: relative;
  grid-area: media;
}

.opening_session_card_media figure {
  overflow: hidden;
  border-radius: 10px;
  aspect-ratio: 16 / 9;
  background-color: #f4f6fb;
}

.opening_session_card_media figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: static;
  transform: none;
}

.opening_session_card_content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  grid-area: content;
}

.opening_session_cards .item:nth-child(odd) .opening_session_card {
  grid-template-areas: "content media";
}

.opening_session_card_content h5 {
  font-size: 20px;
  line-height: 1.6;
  margin: 0;
}

.opening_session_card_content .session_detail_data {
  gap: 10px 5px;
  padding: 0;
  flex-wrap: wrap;
}

.opening_session_card_content .session_detail_data li {
  color: #4a4f67;
}

.opening_session_card_content .session_detail_data .session_place {
  width: 100%;
}
.session_introduction_list .session_summary {
  margin: 0;
  line-height: 1.9;
  color: #222;
}

.opening_session_cta_list {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
  padding: 0;
}

.opening_session_cta_list a {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
      width: 100%;
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: #fff;
  padding: 0 24px;
}

.opening_session_cta_list .cta_item {
  display: flex;
  min-height: 0;
}

.opening_session_cta_list .cta_bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.65);
  transition: filter 0.25s ease;
  z-index: 0;
}

.opening_session_cta_list a::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 20%, rgba(0, 0, 0, 0.55) 100%);
  z-index: 1;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.25s ease;
}

.opening_session_cta_list .cta_label {
  position: relative;
  display: block;
  width: 100%;
  text-align: center;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.05em;
  z-index: 2;
}

.opening_session_cta_list a:hover .cta_bg,
.opening_session_cta_list a:focus .cta_bg {
  filter: brightness(0.8);
}

.opening_session_cta_list a:hover::after,
.opening_session_cta_list a:focus::after {
  opacity: 0.75;
}

@media screen and (max-width: 1023px) {
  .opening_session_card {
    grid-template-columns: 1fr;
    grid-template-areas:
      "media"
      "content";
  }

  .opening_session_cards .item:nth-child(odd) .opening_session_card {
    grid-template-areas:
      "media"
      "content";
  }
}

@media screen and (max-width: 840px) {
  .opening_session_cards {
    gap: 30px;
  }

  .opening_session_card {
  }

  .opening_session_card_content h5 {
    font-size: 18px;
  }

  .opening_session_cta_list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 639px) {
  .opening_session_block {
    margin-bottom: 60px;
  }

  .opening_session_visual {
    margin-bottom: 25px;
    border-radius: 10px;
  }

  .opening_session_card {
    gap: 20px;
  }

  .opening_session_card_media figure {
    border-radius: 8px;
  }
  .opening_session_card_content .session_detail_data {
    margin-bottom: 0;
  }
  .opening_session_card_content .session_detail_data li {
    font-size: 12px;
  }

  .session_introduction_list .session_summary {
    font-size: 13px;
  }

  .opening_session_cta_list {
    grid-template-columns: 1fr;
  }

  .opening_session_cta_list a {
    height: 180px;
  }
  .list_thumbnail .item {
    margin-top: 0;
  }
}