/* CEATEC 2025 Footer Styles - デザインテンプレート準拠 */
.footer-2025 {
  background: linear-gradient(180deg, #2727d5 0%, #292970 90%);
  color: white;
  border-top-left-radius: 30px;
  border-top-right-radius: 30px;
  margin: 30px auto 0;
  padding: 40px 0 0;
  display: flex;
  flex-direction: column;
}

/* 2行×3列グリッドレイアウト */
.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 30px;
  margin-bottom: 40px;
  margin-left: auto;
  margin-right: auto;
      width: 100%;
  max-width: 1200px;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 15px 0;
  color: white;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 8px;
}

.footer-column h4 a {
  color: white;
  text-decoration: none;
}

.footer-column h4 a:hover {
  text-decoration: underline;
}

.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-column li {
  margin-bottom: 8px;
}

.footer-column li li {
  margin-bottom: 0px;
}

.footer-column a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 12px;
  line-height: 1.4;
  transition: color 0.3s ease;
  font-weight: 700;
}

.footer-column a:hover {
  color: white;
  text-decoration: underline;
}
.footer-column ul ul {
padding-left: 1em;
margin-top: 0.25em;
  list-style: none;
}

/* フッター内の非リンクアイテムのスタイリング（トップレベル） */
.footer-column li:not(:has(a)) {
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  line-height: 1.4;
  cursor: default;
  margin-bottom: 8px;
}

/* ネストしたリスト内の非リンクアイテムのスタイリング */
.footer-column ul ul li:not(:has(a)) {
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  line-height: 1.2;
  cursor: default;
}

/* アクションボタンエリア - 4つ横並び100% */
.footer-action-buttons {
  display: flex;
  gap: 10px;
  width: 100%;
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
  margin-left: auto;
  margin-right: auto;
  max-width: 1200px;
}

.footer-action-buttons li {
  flex: 1;
}

.action-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: 3px solid rgba(255, 255, 255, 1);
  border-radius: 10px;
  color: white;
  text-decoration: none;
  font-size: 11px;
  font-weight: 500;
  transition: all 0.3s ease;
  text-align: center;
}

.action-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-1px);
}

.action-btn .material-icons {
  font-size: 18px;
}

/* Disabled action button styling */
.action-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  border-color: rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.6);
}

.action-btn.disabled:hover {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
  transform: none;
  color: rgba(255, 255, 255, 0.6);
}

/* 言語切り替え・バナーエリア */
.footer-bottom-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-top: 20px;
  margin-bottom: 20px;
  margin-left: auto;
  margin-right: auto;
  max-width: 1200px;
}
.footer-bottom-section .lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 25px;
  color: white;
  text-decoration: none;
  font-size: 11px;
  font-weight: 500;
  transition: all 0.3s ease;
}
.footer-bottom-section .lang-btn:hover {
  background: rgba(255, 255, 255, 0.25);
}
.footer-bottom-section .lang-btn .material-icons {
  font-size: 16px;
}

.footer-bottom-section img {
  max-width: 400px;
  height: auto;
  transition: transform 0.3s ease;
}

.footer-bottom-section a:hover img {
  transform: scale(1.05);
}

/* フッターボトム（黒背景） */
.footer-bottom {
  background: #000000;
  color: white;
  padding: 20px;
  justify-content: space-between;
  align-items: flex-start;
  width: 100%;
  max-width: none;
}

.organizer-info {
  display: flex;
  gap: 40px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
  margin-left: auto;
  margin-right: auto;
  max-width: 1200px;
}

.organizer-column {
  width: auto;
  display: inline-block;
}
.organizer-column:last-child {
  margin-left: auto;
}

.organizer-column h5 {
  color: white;
  font-size: 14px;
  font-weight: bold;
  margin: 0 0 10px 0;
  padding-bottom: 5px;
}

.organizer-column p {
  color: #ccc;
  font-size: 12px;
  line-height: 1.4;
  margin: 0 0 5px 0;
}

.footer-bottom-right {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-shrink: 0;
  margin-top: 50px;
  margin-left: auto;
  margin-right: auto;
  max-width: 1200px;
}

.footer-bottom-right a {
  color: white;
  text-decoration: none;
  font-size: 12px;
}

.footer-bottom-right a:hover {
  text-decoration: underline;
}

.footer-bottom-right p {
  color: #fff;
  font-size: 11px;
  margin: 0;
  text-align: right;
}


/*=======side_list_social=======*/
.side_list_social {
  position: fixed;
  right: 0;
  top: 50%;
  width: 45px;
  padding: 12px 0;
  z-index: 10;
}
.list_social ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background-color: #fff;
  box-shadow: 0px 0px 5px 0px rgba(0, 0, 0, 0.3);
  border-top-left-radius: 5px;
  border-bottom-left-radius: 5px;
}

.list_social li {
  margin: 0;
}

.list_social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  transition: all 0.3s ease;
}

.list_social a:hover {
  color: #2727d5;
  transform: scale(1.15);
}

.list_social img {
  width: 20px;
  height: 20px;


/* レスポンシブ対応 */
@media screen and (max-width: 1024px) {
  .footer-columns {
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    padding-left: 25px;
    padding-right: 25px;
  }
}

@media screen and (max-width: 767px) {
  .footer-columns {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .footer-action-buttons {
    flex-direction: column;
    gap: 10px;
    padding-left: 25px;
    padding-right: 25px;
  }
  
  .footer-action-buttons li {
    flex: none;
  }
  
  .footer-bottom-section {
    flex-direction: column;
    gap: 15px;
    text-align: center;
    padding-left: 25px;
    padding-right: 25px;
  }
  
  .footer-bottom-section img {
    max-width: 280px;
  }
  
  .organizer-info {
    flex-direction: column;
    gap: 10px;
  }
  
  .footer-bottom-right {
    flex-direction: column;
    gap: 10px;
    text-align: center;
    padding-left: 25px;
    padding-right: 25px;
  }

  .side_list_social {
    bottom: 80px;
    top: auto;
    transform: none;
    right: 15px;
    width: auto;
  }

  .list_social ul {
    flex-direction: row;
    gap: 5px;
    background: transparent;
    box-shadow: none;
  }
  
  .list_social a {
    width: 35px;
    height: 35px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.15);
  }
}

@media screen and (max-width: 480px) {
  .footer-columns {
    grid-template-columns: 1fr;
  }
  
  .footer-column h4 {
    font-size: 13px;
  }
  
  .footer-column a {
    font-size: 11px;
  }
  
  .action-btn {
    font-size: 10px;
    padding: 6px 12px;
  }
  
  .footer-bottom-section img {
    max-width: 220px;
  }
}

/* ページトップボタン */
#page_top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
}

#page_top a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: rgba(39, 39, 213, 0.9);
  border-radius: 50%;
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
}

#page_top a:hover {
  background: rgba(39, 39, 213, 1);
  transform: translateY(-2px);
}

#page_top .material-icons-round {
  font-size: 24px;
}