/* ==============================
   基本的なリセットと共通スタイル
============================== */
body {
  background-color: #f2f2f2;
  margin: 0;
  padding: 0;
}

/* メインコンテナ */
.webinar-main {
  padding-top: 0px;
  width: 100%;
  overflow-x: hidden;
  background-color: #f2f2f2;
  padding-bottom: 44px;
}

/* 共通カードスタイル */
.webinar-card {
  background: #ffffff;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0px 2px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
}
.webinar-card:hover {
  transform: translateY(-5px);
  box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.15);
}

/* カードリンクスタイル */
.webinar-card-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* サムネイル */
.webinar-card .card-thumbnail {
  width: 100%;
  aspect-ratio: 1200 / 630;
  overflow: hidden;
}

.webinar-card .card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* カードコンテンツ */
.card-content {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* 日付セクション */
.card-date-section {
  background: transparent;
  border-left: 3px solid #28a7e1;
  border-bottom: none;
  padding: 10px 0 10px 15px;
  margin-bottom: 20px;
  border-radius: 0;
  box-shadow: none;
  position: relative;
  display: inline-block;
}

.card-date-display {
  position: relative;
  display: inline-block;
}

.date-label {
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 12px;
  font-weight: 700;
  color: #28a7e1;
  letter-spacing: 0.1em;
  margin-bottom: 5px;
  opacity: 0.9;
}

.card-date-display {
  display: block;
}

.date-main {
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #1a1a1a;
  letter-spacing: 0.05em;
  display: block;
}

.date-time {
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 14px;
  font-weight: 400;
  color: #666;
  margin-top: 4px;
  display: block;
}

/* カードタイトル */
.card-title {
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 19px;
  font-weight: 700;
  line-height: 34px;
  letter-spacing: 4px;
  margin-bottom: 15px;
  color: #333;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 3.2em;
}

/* カードメタ情報 */
.card-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

/* タグとステータスコンテナ */
.card-tags-status {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

/* タグスタイル */
.card-tag {
  display: inline-flex;
  padding: 2px 12px;
  background: #28a7e1;
  color: #fff;
  text-align: center;
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 12px;
  font-weight: 700;
  line-height: 24px;
  letter-spacing: 2.4px;
  white-space: nowrap;
  border-radius: 100px;
}

/* ステータススタイル */
.card-status {
  display: inline-flex;
  padding: 3px 12px;
  text-align: center;
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.05em;
  white-space: nowrap;
  border-radius: 20px;
}

.card-status.upcoming {
  background: #2e7d32;
  color: #fff;
}

.card-status.full {
  background: #f57c00;
  color: #fff;
}

.card-status.archived {
  background: #666;
  color: #fff;
}

/* 日付表示は card-date-section に統合済みのため削除 */

/* ==============================
   ヘッダーセクション
============================== */
.webinar-page-header {
  display: flex;
  align-items: center;
  gap: 30px;
  padding: 0 40px;
  max-width: 1350px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  margin-top: 85px;
}

.webinar-header-wrapper,
.section-header-wrapper {
  display: flex;
  align-items: center;
  gap: 20px;
}

.webinar-title-group {
  display: flex;
  align-items: center;
  gap: 20px;
  min-width: 0;
}

.webinar-main-title {
  color: #333;
  font-family: "BIZ UDGothic";
  font-size: 32px;
  font-style: normal;
  font-weight: 700;
  line-height: normal;
  letter-spacing: 8px;
  margin: 0;
  white-space: nowrap;
}

.webinar-sub-title {
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 16px;
  font-weight: 400;
  color: #666;
  margin-top: 5px;
  letter-spacing: 2px;
}

/* デコレーティブライン */
.webinar-decorative-lines,
.upcoming-decorative-lines,
.all-webinars-decorative-lines,
.filter-decorative-lines {
  flex-grow: 1;
  display: flex;
  flex-direction: row;
  gap: 12px;
  min-width: 0;
}

.line {
  display: block;
  height: 2px;
  width: 100%;
}

.blue-line {
  background-color: #00a0e9;
}

.red-line {
  background-color: #de021e;
}

/* ==============================
   イメージセクション
============================== */
.webinar-image {
  margin-top: 60px;
  width: 100%;
}

.webinar-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==============================
   コンテンツエリア
============================== */
.webinar-content {
  max-width: 1350px;
  margin: 0 auto;
  padding: 0 40px;
}

/* 説明文 */
.webinar-info-text {
  text-align: center;
  font-size: 18px;
  color: #666;
  margin: 30px 0 50px;
}

/* ==============================
   セクションヘッダー
============================== */
.upcoming-header {
  max-width: 1350px;
  margin: 110px auto 0px;
  padding: 0 40px;
}

.all-webinars-header,
.filter-header {
  max-width: 1350px;
  margin: 60px auto 40px;
  padding: 0 40px;
}

.title-group {
  flex-shrink: 0;
}

.main-title {
  font-family: "BIZ UDGothic", sans-serif;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 8px;
  margin: 0;
  color: #333;
  display: inline-block;
}

/* ==============================
   カードグリッド
============================== */
.upcoming-cards {
  margin-bottom: 60px;
}

.all-webinars-cards {
  margin-bottom: 60px;
  padding: 0 40px;
  max-width: 1350px;
  margin-left: auto;
  margin-right: auto;
}

.articles-wrapper,
.webinar-articles-grid .articles-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

/* 開催予定のウェビナーカードを横長デザインに変更 */
.upcoming-cards {
  padding: 0 40px;
  margin-bottom: 20px;
  max-width: 1350px;
  margin-left: auto;
  margin-right: auto;
}

/* 開催予定のページネーション専用スタイル */
.upcoming-pagination {
  margin-top: 30px;
  margin-bottom: 60px;
}

.upcoming-cards .articles-wrapper {
  display: flex;
  flex-direction: column;
  gap: 30px;
  padding: 20px 0;
}

.upcoming-cards .webinar-card {
  display: flex;
  flex-direction: row;
  height: auto;
  max-width: 100%;
  transform: none;
  overflow: hidden;
}

.upcoming-cards .webinar-card-link {
  display: flex;
  flex-direction: row;
  width: 100%;
  height: 100%;
  align-items: stretch;
}

.upcoming-cards .card-thumbnail {
  width: 45%;
  min-height: 250px;
  flex-shrink: 0;
  overflow: hidden;
  aspect-ratio: 1200 / 630;
  display: flex;
  align-items: center;
}

.upcoming-cards .card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.upcoming-cards .card-content {
  padding: 30px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.upcoming-cards .card-date-section {
  padding: 12px 20px;
  margin-bottom: 20px;
  max-width: 400px;
}

.upcoming-cards .date-label {
  font-size: 13px;
}

.upcoming-cards .date-main {
  font-size: 20px;
}

.upcoming-cards .date-time {
  font-size: 16px;
}

.upcoming-cards .card-title {
  font-size: 19px;
  line-height: 34px;
  letter-spacing: 4px;
  margin-bottom: 20px;
  -webkit-line-clamp: 3;
  min-height: auto;
}

.upcoming-cards .card-meta {
  flex-direction: row;
  align-items: center;
  gap: 15px;
}

.upcoming-cards .card-tags-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.upcoming-cards .card-tag {
  font-size: 12px;
  padding: 2px 12px;
  border-radius: 100px !important;
  line-height: 24px;
  letter-spacing: 2.4px;
}

.upcoming-cards .card-status {
  font-size: 14px;
  padding: 5px 16px;
  border-radius: 50px !important;
}

/* カードの高さを揃える */
.webinar-card-wrapper {
  height: 100%;
}

/* 空の状態メッセージ */
.no-posts {
  text-align: center;
  padding: 60px 20px;
  color: #666;
  font-size: 16px;
  font-family: "BIZ UDGothic", sans-serif;
  letter-spacing: 0.05em;
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  background-color: #f9f9f9;
  border-radius: 8px;
  margin: 0 auto;
  max-width: 600px;
  width: 100%;
}

/* 開催予定セクション内のメッセージ */
.upcoming-cards .no-posts {
  background-color: #fff;
  border: 1px solid #e0e0e0;
}

/* ==============================
   タグフィルターセクション
============================== */
.webinar-filter-section {
  margin: 60px 0 60px;
}

/* タグボタンコンテナ */
.tag-filter-container {
  max-width: 1350px;
  margin: 50px auto 0px auto;
  padding: 0 40px;
  box-sizing: border-box;
}

.tag-buttons {
  background: rgba(255, 255, 255, 0.6);
  border-radius: 9.996px;
  display: flex;
  padding: 30px 30px;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 30px;
}

/* タグボタンスタイル */
.tag-btn {
  display: inline-flex;
  min-width: fit-content;
  padding: 8px 50px;
  justify-content: center;
  align-items: center;
  border-radius: 7px;
  background: #b9b9b9;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;

  color: #fff;
  font-family: "BIZ UDGothic";
  font-size: 16px;
  font-style: normal;
  font-weight: 700;
  line-height: 28px;
  letter-spacing: 3.2px;
  white-space: nowrap;
}

.tag-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.tag-btn.active {
  background: #e61221;
  transform: translateY(0);
}

.tag-btn .ripple {
  position: absolute;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* 「すべて」ボタンはデフォルトでactiveクラスを持つため特別なスタイリングは不要 */

/* カードラッパー（フィルター用） */
.webinar-card-wrapper {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.webinar-card-wrapper.hidden {
  display: none;
}

/* ==============================
   レスポンシブデザイン
============================== */
/* 1200px以下のレイアウト調整 */
@media (max-width: 1200px) {
  .upcoming-cards .webinar-card {
    flex-direction: column;
  }

  .upcoming-cards .webinar-card-link {
    flex-direction: column;
  }

  .upcoming-cards .card-thumbnail {
    width: 100%;
    height: 250px;
  }

  .upcoming-cards .card-content {
    padding: 25px;
  }
}

@media (max-width: 768px) {
  /* メインコンテナ */
  .webinar-main {
    padding-top: 110px;
  }

  /* ヘッダーセクション */
  .webinar-page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    padding: 0 20px;
    margin: 20px auto 0;
  }

  /* 画像セクション */
  .webinar-image {
    margin-top: 40px;
  }

  .webinar-image img {
    width: 100%;
    height: 170px;
    object-fit: cover;
  }

  /* セクションヘッダー */
  .upcoming-header {
    margin: 60px auto 0;
    padding: 0 15px;
  }

  .all-webinars-header,
  .filter-header {
    margin: 30px auto 20px;
    padding: 0 15px;
  }

  /* モバイルでは縦並びに */
  .webinar-header-wrapper,
  .section-header-wrapper {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .webinar-decorative-lines,
  .upcoming-decorative-lines,
  .all-webinars-decorative-lines,
  .filter-decorative-lines {
    max-width: 100%;
    width: 100%;
    gap: 8px;
  }

  .webinar-main-title {
    font-size: 20px;
    letter-spacing: 5px;
  }

  .webinar-sub-title {
    font-size: 12px;
    letter-spacing: 1.5px;
  }

  .main-title {
    font-size: 20px;
    letter-spacing: 5px;
  }

  .articles-wrapper {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .card-title {
    font-size: 18px;
    line-height: 32px;
    letter-spacing: 1.7px;
  }

  /* モバイルでの開催予定カード調整 */
  .upcoming-cards {
    padding: 0 15px;
    margin-bottom: 40px;
  }

  .all-webinars-cards {
    padding: 0 15px;
    margin-bottom: 40px;
  }

  .upcoming-cards .articles-wrapper {
    gap: 20px;
    padding: 10px 0;
  }

  .upcoming-cards .webinar-card {
    flex-direction: column;
  }

  .upcoming-cards .webinar-card-link {
    flex-direction: column;
  }

  .upcoming-cards .card-thumbnail {
    width: 100%;
    height: 190px;
    min-height: 190px;
  }

  .upcoming-cards .card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  /* 通常のカードのサムネイル調整 */
  .card-thumbnail {
    height: 190px;
  }

  .upcoming-cards .card-content {
    padding: 20px;
  }

  .upcoming-cards .card-date-section {
    padding: 10px 15px;
    margin-bottom: 15px;
    max-width: 100%;
  }

  .upcoming-cards .date-main {
    font-size: 16px;
  }

  .upcoming-cards .date-time {
    font-size: 14px;
  }

  .upcoming-cards .card-title {
    font-size: 18px;
    line-height: 32px;
    letter-spacing: 1.7px;
    margin-bottom: 15px;
    -webkit-line-clamp: 2;
  }

  .upcoming-cards .card-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .upcoming-cards .card-tag {
    font-size: 8px;
    padding: 0px 16px;
    border-radius: 100px !important;
    line-height: 19px;
    letter-spacing: 1.6px;
  }

  /* 通常のカードのタグも調整 */
  .card-tag {
    font-size: 8px;
    padding: 0px 16px;
    line-height: 19px;
    letter-spacing: 1.6px;
  }

  .upcoming-cards .card-status {
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 50px !important;
  }

  .webinar-content {
    padding: 0 15px;
  }

  /* ラインの高さ調整 */
  .line {
    height: 2px;
  }

  /* タグフィルター */
  .tag-filter-container {
    margin: 30px auto 0;
    padding: 0 15px;
  }

  .tag-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    padding: 20px 25px;
    gap: 7px;
  }

  .tag-btn {
    font-size: 13px;
    padding: 6px 25px;
    letter-spacing: 2px;
    line-height: 22px;
    border-radius: 5px;
  }
}

/* 575px以下のスタイル */
@media (max-width: 575px) {
  .webinar-main {
    padding-top: 110px;
  }

  .webinar-page-header {
    margin-top: 0px;
    padding: 0 45px;
  }

  .webinar-main-title {
    font-size: 20px;
    letter-spacing: 3.6px;
  }

  .card-title {
    font-size: 13px;
    line-height: 30px;
    letter-spacing: 1.7px;
  }

  .upcoming-cards .card-title {
    font-size: 13px;
    line-height: 30px;
  }

  .upcoming-header,
  .all-webinars-header,
  .filter-header {
    padding: 0 15px;
  }

  .upcoming-cards,
  .all-webinars-cards {
    padding: 0 15px;
  }

  .webinar-content {
    padding: 0 15px;
  }

  .tag-filter-container {
    padding: 0 15px;
  }

  .tag-buttons {
    padding: 15px 20px;
  }

  .tag-btn {
    font-size: 12px;
    padding: 5px 20px;
    letter-spacing: 1.6px;
    line-height: 20px;
    border-radius: 4px;
  }
}

/* 480px以下のスタイル */
@media (max-width: 480px) {
  .webinar-page-header {
    padding: 0 20px;
  }

  .webinar-main-title {
    font-size: 18px;
    letter-spacing: 3px;
  }

  .main-title {
    font-size: 18px;
    letter-spacing: 3px;
  }

  .card-title {
    font-size: 12px;
    line-height: 28px;
  }

  .upcoming-cards .card-title {
    font-size: 12px;
    line-height: 28px;
  }

  .tag-btn {
    font-size: 11px;
    padding: 4px 15px;
    letter-spacing: 1.4px;
    line-height: 18px;
  }
}