@charset "UTF-8";

/* ==========================================================================
   コンファレンス プレビュー（/ja/conference/ , /en/conference/）専用
   ページ構成: ページ見出し / MV / テーマ / 注目セッション / ネクスト
   NOTE: 共通CSS(style.css, add.css, under-2026.css)は変更しない方針のため、
         このページで必要な追加分だけをここに置く
   ========================================================================== */

:root {
  /* ベース */
  --conf-navy: #0a1a4a;
  --conf-navy-deep: #071335;
  --conf-navy-deep-rgb: 7, 19, 53;
  --conf-navy-mid-rgb: 8, 22, 60;
  --conf-navy-light-rgb: 9, 24, 66;
  --conf-navy-rgb: 10, 26, 74;

  /* テキスト */
  --conf-text: #1f2f59;
  --conf-text-sub: #5a6a8a;
  --conf-text-body: #3d4a67;
  --conf-text-dark: #333;
  --conf-text-muted: #555;

  /* 青系アクセント */
  --conf-blue: #2e86c1;
  --conf-blue-light: #6ba3d6;
  --conf-date: #8ebcdc;
  --conf-heading: #1c4d8d;
  --conf-session-title: #44799d;
  --conf-accent-muted: #738ba3;
  --conf-meta: #91afce;

  /* 線・背景・UI */
  --conf-line: #bbd3e4;
  --conf-time-line: #c3cede;
  --conf-border: #eaeaea;
  --conf-panel: #f2f4f7;
  --conf-placeholder: #eef1f5;
  --conf-speaker-placeholder: #dfe3ea;
  --conf-code-bg: #afbecd;
  --conf-note: #8a95a8;

  /* グラデーション */
  --conf-sessions-grad-start: #c9d2df;
  --conf-sessions-grad-end: #cfe6cb;

  /* Sessions タブ */
  --conf-tab-bar-bg: #b8c7d6;
  --conf-tab-inactive: #fff;
  --conf-tab-active-text: #5a6a8a;
  --conf-tab-active-line: #1f2f59;
  --conf-release-grad-start: #2f6ea8;
  --conf-release-grad-end: #7eb8e8;

  /* 半透明 */
  --conf-white-90: rgba(255, 255, 255, 0.9);
  --conf-white-80: rgba(255, 255, 255, 0.8);
  --conf-white-45: rgba(255, 255, 255, 0.45);
  --conf-navy-overlay-38: rgba(var(--conf-navy-deep-rgb), 0.38);
  --conf-shadow: rgba(12, 26, 73, 0.06);
  --conf-shadow-hover: rgba(12, 26, 73, 0.12);
  --conf-themes-bg: rgba(200, 210, 225, 0.35);

  /* レイアウト */
  --conf-speaker-card-w: calc((1360px - 64px) / 5);
}

/* ヘッダー下端の波（header-title-bg-2026.css）は既定で本文の白に合わせた塗りだが、
   このページはヘッダー直下が .conf-mv（紺 --conf-navy: #0a1a4a）で白ではないため、
   background-image を同じ形・fill だけ --conf-navy に変えたSVGへこのページ限定で丸ごと差し替える。
   NOTE: data URI 内は静的な文字列なので var(--conf-navy) は使えず、値を直書きしている。
   --conf-navy を変更したときはここも合わせて変えること。 */
.header-title-2026__wave::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 3600 200' preserveAspectRatio='none'%3E%3Cpath fill='%230a1a4a' d='M0,120 C400,102 400,102 800,120 C1300,142.5 1300,142.5 1800,120 C2250,99.75 2250,99.75 2700,120 C3150,140.25 3150,140.25 3600,120 L3600,200 L0,200 Z'/%3E%3C/svg%3E");
}

/* --------------------------------------------------------------------------
   ページ見出しの英字サブタイトル
   header.php で $page_title_en をセットしたときだけ出力される要素。
   位置は共通の .page-title-2026__title（max-width 1440 / padding 0 40px）に揃える
   -------------------------------------------------------------------------- */
.page-title-2026__en {
  max-width: 1440px;
  margin: 6px auto 0;
  padding: 0 40px;
  box-sizing: border-box;
  color: var(--conf-white-80);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

@media screen and (max-width: 767px) {
  .page-title-2026__en {
    padding: 0 20px;
    font-size: 12px;
  }
}

/* --------------------------------------------------------------------------
   ページ共通
   -------------------------------------------------------------------------- */
.conf-preview {
  overflow-x: hidden;
  color: var(--conf-text);
}

/* 英字の大見出し（The Sessions / Next） */
.conf-sessions__title,
.conf-next__title {
  margin: 0;
  color: var(--ceatecblue);
  font-size: 42px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

/* ■ 付きの中見出し（Pickup Speakers / SNS 等） */
.conf-subhead {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--ceatecblue);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

.conf-subhead::before {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  background: currentColor;
}

.conf-subhead--sm {
  font-size: 15px;
}

.conf-subhead--sm::before {
  width: 7px;
  height: 7px;
}

/* 各ブロックの左端を、共通のページ見出し・コンテンツエリアと揃える */
.conf-preview .conf-mv__inner,
.conf-preview .conf-themes__inner,
.conf-preview .conf-sessions__inner,
.conf-preview .conf-next__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  box-sizing: border-box;
}

/* ==========================================================================
   MV（メインビジュアル + 説明）
   ========================================================================== */

.conf-mv {
  position: relative;
  overflow: hidden;
  background: var(--conf-navy);
}

.conf-mv__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* NOTE: style.css の img { object-fit: contain } を打ち消す */
.conf-mv__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 65% 50%;
}

/* 左側を紺で潰し、右の写真へ向かって抜けていくオーバーレイ */
.conf-mv__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg,
      rgba(var(--conf-navy-deep-rgb), 0.97) 0%,
      rgba(var(--conf-navy-mid-rgb), 0.94) 26%,
      rgba(var(--conf-navy-light-rgb), 0.74) 54%,
      rgba(var(--conf-navy-rgb), 0.52) 78%,
      rgba(var(--conf-navy-rgb), 0.46) 100%),
    linear-gradient(180deg, rgba(var(--conf-navy-deep-rgb), 0.5) 0%, rgba(var(--conf-navy-deep-rgb), 0) 40%);
}

.conf-mv__inner {
  padding: 88px 40px 96px;
}

.conf-mv__title {
  margin: 0;
  color: var(--color-white);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

.conf-mv__body {
  margin-top: 28px;
}

.conf-mv__body p {
  margin: 0;
  color: var(--conf-white-90);
  font-size: 15px;
  line-height: 2;
}

.conf-mv__body p + p {
  margin-top: 1.6em;
}

/* 公開日バッジ */
.conf-mv__release {
  display: inline-flex;
  align-items: stretch;
  margin: 44px 0 0;
  border-radius: 4px;
  overflow: hidden;
  background: linear-gradient(90deg, var(--conf-release-grad-start) 0%, var(--conf-release-grad-end) 100%);
}

.conf-mv__release-label {
  display: flex;
  align-items: center;
  padding: 10px 18px;
  background: var(--conf-navy-overlay-38);
  border-right: 1px solid var(--conf-white-45);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

.conf-mv__release-date {
  display: flex;
  align-items: baseline;
  align-self: center;
  gap: 0;
  padding: 10px 24px;
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  white-space: nowrap;
}

.conf-mv__release-num {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
}

.conf-mv__release-highlight {
  font-size: 22px;
  font-weight: 800;
  line-height: 1;
}

@media screen and (max-width: 1119px) {
  .conf-mv__title {
    font-size: 28px;
  }
}

@media screen and (max-width: 767px) {
  /* SPは写真の上に文字が乗るため、オーバーレイを一段濃くする */
  .conf-mv__media::after {
    background:
      linear-gradient(180deg, rgba(var(--conf-navy-deep-rgb), 0.86) 0%, rgba(var(--conf-navy-mid-rgb), 0.92) 100%);
  }

  .conf-mv__media img {
    object-position: 60% 50%;
  }

  .conf-mv__inner {
    padding: 56px 20px 64px;
  }

  .conf-mv__title {
    font-size: 24px;
  }

  .conf-mv__body {
    margin-top: 20px;
  }

  .conf-mv__body p {
    font-size: 14px;
    line-height: 1.9;
  }

  /* 改行指定はPCの想定なので、SPでは折り返しに任せる */
  .conf-mv__body br,
  .conf-themes__desc br {
    display: none;
  }

  .conf-mv__release {
    margin-top: 32px;
  }
}

/* スマホ（サイト共通の 480px ブレークポイント） */
@media screen and (max-width: 480px) {
  .conf-mv__release {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 100%;
  }

  .conf-mv__release-label {
    justify-content: center;
    padding: 10px 12px;
    border-right: none;
    border-bottom: 1px solid var(--conf-white-45);
    font-size: 11px;
    text-align: center;
  }

  .conf-mv__release-date {
    align-self: auto;
    display: flex;
    align-items: baseline;
    justify-content: center;
    padding: 10px 16px;
    font-size: 14px;
    text-align: center;
    white-space: normal;
  }

  .conf-mv__release-num {
    font-size: 22px;
  }
}

/* ==========================================================================
   テーマ（変革を捉える5つの指標）
   ========================================================================== */

.conf-themes {
  position: relative;
  overflow-x: hidden;
  background: var(--color-white);
}

.conf-themes__head {
  display: grid;
  grid-template-areas: "stack";
  justify-items: center;
  align-items: center;
  width: 100%;
}

.conf-themes__bg,
.conf-themes__title {
  grid-area: stack;
  justify-self: center;
  align-self: center;
}

.conf-themes__bg {
  margin: 0;
  margin-top: -50px;
  width: max-content;
  max-width: 100%;
  color: rgba(31, 47, 89, 0.09);
  font-family: "Montserrat", sans-serif;
  font-size: 120px;
  font-weight: 300;
  font-style: italic;
  line-height: 1;
  letter-spacing: -0.02em;
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
}

.conf-themes__inner {
  position: relative;
  padding: 54px 40px 64px;
}

.conf-themes__title {
  position: relative;
  z-index: 1;
  width: 100%;
  margin: 0;
  color: var(--ceatecblue);
  font-size: 28px;
  font-weight: 800;
  line-height: 1.55;
  text-align: center;
      margin-top: 2em;
}

.conf-themes__title-num {
  font-size: 46px;
}

.en .conf-themes__title {
  max-width: min(920px, 100%);
}

.en .conf-themes__bg {
  margin-top: -40px;
}

.conf-themes__desc {
  margin: 16px 0 0;
  color: var(--conf-text-body);
  font-size: 14px;
  line-height: 1.9;
  text-align: center;
}

/* 3列 + 2列（2列目は中央寄せ） */
.conf-themes__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  row-gap: 20px;
  column-gap: 20px;
  margin: 28px 0 0;
  padding: 0;
}

.conf-theme {
  display: flex;
  flex-direction: column;
  flex: 0 0 calc(33.333% - 13.334px);
  background: var(--color-white);
  border: 1px solid var(--conf-border);
}

.conf-theme__figure {
  margin: 0;
}

.conf-theme__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--conf-placeholder);
}

.conf-theme__body {
  padding: 16px 20px 20px;
}

.conf-theme__head {
  margin: 0;
}

.conf-theme__en {
  color: var(--conf-heading);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}

.conf-theme__title {
  margin: 0 0 8px;
  color: var(--conf-heading);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
}

.conf-theme__desc {
  margin: 0;
  color: var(--conf-text-muted);
  line-height: 1.7;
}

/* 2列 + 2列 + 1列（中央寄せ） */
@media screen and (max-width: 1119px) {
  .conf-themes__bg {
    font-size: 80px;
  }

  .conf-themes__title {
    font-size: 24px;
  }

  .conf-themes__title-num {
    font-size: 32px;
  }

  .conf-theme {
    flex-basis: calc(50% - 10px);
  }
}

/* ==========================================================================
   注目セッション（Pickup Speakers / Pickup Sessions）
   ========================================================================== */

.conf-sessions {
  background: linear-gradient(180deg, var(--conf-sessions-grad-start) 0%, var(--conf-sessions-grad-end) 100%);
}

.conf-sessions__inner {
  padding: 56px 40px 64px;
}

.conf-sessions__lead {
  margin: 12px 0 0;
  color: var(--ceatecblue);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.55;
}

.conf-sessions__desc {
  margin: 8px 0 0;
  color: var(--conf-text-body);
  font-size: 14px;
  line-height: 1.8;
}

.conf-sessions .conf-subhead {
  margin-top: 40px;
}

/* ---------- Pickup Speakers ---------- */
.conf-speakers-track {
  margin: 20px 0 0;
}

.conf-speakers {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 16px;
  margin: 0;
  padding: 0;
}

.conf-speaker {
  display: flex;
  flex-direction: column;
  flex: 0 0 calc((100% - 64px) / 5);
  background: var(--color-white);
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--conf-shadow);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.conf-speaker:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px var(--conf-shadow-hover);
}

.conf-speaker__figure {
  margin: 0;
}

.conf-speaker__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: top center;
  background: var(--conf-speaker-placeholder);
}

.conf-speaker__body {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  padding: 12px 12px 14px;
}

.conf-speaker__name {
  margin: 0;
  color: var(--conf-heading);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

.conf-speaker__honorific {
  margin-left: 2px;
  font-size: 11px;
  font-weight: 700;
}

.conf-speaker__org {
  margin: 4px 0 0;
  color: var(--conf-text-sub);
  font-size: 10px;
  line-height: 1.6;
  text-align: center;
}

/* 対応する Pickup Sessions の行へページ内アンカーで飛ばす（日付＋タイトル） */
.conf-speaker__session {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  flex-shrink: 0;
  margin-top: auto;
  padding-top: 10px;
  padding-right: 18px;
  min-height: calc(1.4em + 3em);
  color: var(--conf-accent-muted);
  font-size: 11px;
  line-height: 1.5;
  box-sizing: content-box;
}

.conf-speaker__time {
  display: block;
  font-weight: 600;
  line-height: 1.4;
}

.conf-speaker__dow {
  font-size: 10px;
}

.conf-speaker__session-title {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  margin-top: 4px;
  font-weight: 400;
}

.conf-speaker__session::after {
  content: "keyboard_double_arrow_down";
  position: absolute;
  right: 0;
  bottom: 0;
  font-family: "Material Icons Round";
  font-size: 16px;
  font-weight: 400;
  color: var(--conf-accent-muted);
}

.conf-speaker__session:hover {
  opacity: 0.7;
}

/* ---------- Sessions Tabs ---------- */
.conf-tabs {
  display: flex;
  gap: 8px;
  margin: 20px 0 0;
}

.conf-tab {
  flex: 1;
  padding: 14px 12px 10px;
  border: none;
  border-bottom: 1px solid var(--conf-tab-inactive);
  background: transparent;
  color: var(--conf-tab-inactive);
  font-family: "LINE Seed JP", sans-serif;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, opacity 0.2s;
}

.conf-tab:hover {
  opacity: 0.85;
}

.conf-tab.is-active {
  color: var(--conf-tab-active-text);
  border-bottom: 3px solid var(--conf-tab-active-text);
}

.conf-tab__dow {
  font-size: 14px;
  font-weight: 500;
}

/* 英語タブ: (Tue) 等が長いためサイズを抑える */
.en .conf-tab {
  font-size: 18px;
  letter-spacing: 0;
}

.en .conf-tab__dow {
  font-size: 12px;
}

/* タブ連動: 非アクティブなグループを非表示 */
.conf-session-group {
  display: none;
}

.conf-session-group.is-active {
  display: block;
}

/* ---------- Pickup Sessions ---------- */

/* 日付グループコンテナ */
.conf-session-groups {
  margin: 8px 0 0;
}

.conf-session-group {
  margin: 0;
}

/* タブ表示のためグループ間の縦余白は不要 */
.conf-session-group + .conf-session-group {
  margin-top: 0;
}

/* 日付見出し（タブ表示のため非表示） */
.conf-session-group__date {
  display: none;
}

.conf-session-group__num {
  font-size: 18px;
  letter-spacing: -0.02em;
}

.conf-session-group__sep {
  margin: 0 1px;
  font-size: 14px;
  font-weight: 600;
}

.conf-session-group__dow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  padding: 0;
  border: 1px solid var(--conf-blue-light);
  box-sizing: border-box;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
  text-align: center;
}

.en .conf-session-group__dow {
  width: auto;
  min-width: 22px;
  padding: 0 4px;
}

/* セッションリスト */
.conf-session-list {
  margin: 0;
  padding: 0;
}

/* 各セッション（3カラム） */
.conf-session {
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 0;
  padding: 14px 16px;
  background: var(--color-white);
  border-radius: 0;
  box-shadow: none;
  scroll-margin-top: 20px;
}

.conf-session + .conf-session {
  margin-top: 3px;
}

.conf-session:target {
  box-shadow: none;
  outline: 2px solid var(--conf-blue-light);
  outline-offset: -2px;
}

/* PC: head はラップのみ（子要素が flex 行に直接参加） */
.conf-session__head {
  display: contents;
}

.conf-session__main {
  order: 2;
}

.conf-session__aside {
  order: 3;
}

/* 左カラム: 時刻 */
.conf-session__time {
  order: 1;
  flex: 0 0 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 72px;
  min-width: 72px;
  padding-right: 16px;
  border-right: 1px solid var(--conf-line);
  margin: 0;
  color: var(--conf-accent-muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
}

.conf-session__time-start::after {
  content: "";
  display: block;
  width: 1px;
  height: 10px;
  margin: 3px auto;
  background: var(--conf-time-line);
}

/* 中カラム: タイトル・概要・note・登壇者 */
.conf-session__main {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0 16px;
}

.conf-session__title {
  margin: 0;
  color: var(--conf-session-title);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.6;
}

.conf-session__note {
  margin: 4px 0 0;
  padding: 0;
  color: var(--conf-note);
  font-size: 11px;
  line-height: 1.5;
  text-align: left;
}

.conf-session__desc {
  margin: 6px 0 0;
  color: var(--conf-text-dark);
  font-size: 12px;
  line-height: 1.7;
}

.conf-session__desc + .conf-session__note {
  margin-top: 4px;
}

.conf-session__speaker {
  margin: 6px 0 0;
  color: var(--conf-note);
  font-size: 12px;
  line-height: 1.5;
}

.conf-session__speaker-label {
  color: var(--conf-note);
}

.conf-session__speaker::before {
  content: "person";
  margin-right: 4px;
  font-family: "Material Icons Round";
  font-size: 13px;
  font-weight: 400;
  vertical-align: -2px;
  color: var(--conf-note);
}

/* 右カラム: セッションID・場所（縦並び） */
.conf-session__aside {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  min-width: 100px;
  padding-left: 16px;
}

.conf-session__code {
  flex: 0 0 auto;
  margin: 0;
  padding: 2px 8px;
  border-radius: 3px;
  background: var(--conf-code-bg);
  color: var(--color-white);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.conf-session__place {
  margin: 0;
  color: var(--conf-meta);
  font-size: 12px;
  line-height: 1.5;
  text-align: right;
}

.conf-session__place::before {
  content: "place";
  margin-right: 4px;
  font-family: "Material Icons Round";
  font-size: 13px;
  font-weight: 400;
  vertical-align: -2px;
}

@media screen and (max-width: 1119px) {
  .conf-sessions__title,
  .conf-next__title {
    font-size: 28px;
  }

  /* PC以下は全員スライダー（タブレットはカードをやや小さく） */
  :root {
    --conf-speaker-card-w: 200px;
  }

  .conf-speakers-track {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .conf-speakers-track::-webkit-scrollbar {
    display: none;
  }

  .conf-speaker {
    flex: 0 0 var(--conf-speaker-card-w);
    scroll-snap-align: start;
  }

  .conf-themes__bg {
    font-size: 80px;
  }
}

@media screen and (max-width: 767px) {
  .conf-sessions__inner {
    padding: 40px 20px 48px;
  }

  .conf-sessions__title,
  .conf-next__title {
    font-size: 24px;
  }

  .conf-sessions__lead {
    font-size: 15px;
  }

  .conf-sessions .conf-subhead {
    margin-top: 28px;
  }

  /* 日付グループ（タブ表示のためグループ間余白なし） */
  .conf-session-group + .conf-session-group {
    margin-top: 0;
  }

  /* 日付見出しはタブ表示のため非表示 */

  .conf-session-group__num {
    font-size: 16px;
  }

  .conf-session-group__dow {
    width: 20px;
    height: 20px;
    font-size: 9px;
  }

  .en .conf-session-group__dow {
    width: auto;
    min-width: 20px;
    padding: 0 3px;
  }

  /* セッション: SP は head 行 + 本文 */
  .conf-session {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
  }

  .conf-session__head {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    order: 0;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--conf-line);
  }

  .conf-session__time {
    order: 0;
    flex: 0 1 auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    width: auto;
    min-width: 0;
    padding-right: 0;
    padding-bottom: 0;
    border-right: none;
    border-bottom: none;
    font-size: 13px;
  }

  .conf-session__time-start::after {
    display: inline-block;
    width: 12px;
    height: 1px;
    margin: 0 0 0 8px;
    vertical-align: middle;
  }

  .conf-session__main {
    order: 1;
    padding: 0;
  }

  .conf-session__title {
    font-size: 13px;
  }

  .conf-session__title br {
    display: none;
  }

  .conf-session__note {
    margin-top: 4px;
    font-size: 10px;
  }

  .conf-session__desc {
    margin-top: 4px;
    font-size: 11px;
  }

  .conf-session__speaker {
    margin-top: 4px;
    font-size: 11px;
  }

  .conf-session__aside {
    order: 0;
    flex: 0 1 auto;
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
    max-width: 62%;
    padding-left: 0;
  }

  .conf-session__place {
    order: 0;
    min-width: 0;
    text-align: right;
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .conf-session__code {
    order: 1;
    flex-shrink: 0;
  }

  .conf-themes__bg {
    font-size: 48px;
  }

  :root {
    --conf-speaker-card-w: 176px;
  }

  /* Sessions Tabs SP */
  .conf-tab {
    padding: 12px 6px 8px;
    font-size: 16px;
  }

  .conf-tab.is-active {
    border-bottom-width: 2px;
  }

  .conf-tab__dow {
    font-size: 12px;
  }

  .en .conf-tabs {
    gap: 4px;
  }

  .en .conf-tab {
    padding: 12px 2px 8px;
    font-size: clamp(11px, 3.1vw, 14px);
    letter-spacing: 0;
  }

  .en .conf-tab__dow {
    font-size: clamp(9px, 2.4vw, 11px);
  }

  /* Pickup Sessions: SP は横スワイプで日付切り替え */
  .conf-session-groups {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .conf-session-groups::-webkit-scrollbar {
    display: none;
  }

  .conf-session-group {
    flex: 0 0 100%;
    scroll-snap-align: start;
    display: block !important;
  }

  /* スワイプ中のみ日付パネル間にすき間（停止時は gap なし・一覧はフル幅） */
  .conf-session-groups.is-scrolling {
    gap: 10px;
  }
}

/* ==========================================================================
   ネクスト（次回の更新予定 / SNS紹介）
   ========================================================================== */

.conf-next {
  background: var(--color-white);
}

.conf-next__inner {
  padding: 56px 40px 64px;
}

.conf-next__intro {
  margin: 12px 0 0;
  color: var(--conf-text-body);
  font-size: 14px;
  line-height: 1.8;
}

/* 日付8/27＋公開内容 を内側に寄せるラッパー */
.conf-next__box {
  max-width: 1000px;
  margin: 24px auto 0;
}

.conf-next__release {
  display: flex;
  align-items: stretch;
  gap: 24px;
}

/* ---------- 日付 ---------- */
.conf-next__datebox {
  position: relative;
  flex: 0 0 auto;
  width: 120px;
  padding-right: 24px;
  border-right: none;
}

/* 区切り線の左側・左向き三角（位置固定） */
.conf-next__cols::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 24px;
  z-index: 1;
  transform: translateX(calc(-100% - 2px));
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 8px 10px 8px 0;
  border-color: transparent var(--conf-blue-light) transparent transparent;
}

/* 「8」と「27」を斜線で区切るレイアウト。斜線は ::after の細い棒を回転して作る */
.conf-next__date {
  position: relative;
  width: 100px;
  height: 100px;
  margin: 0;
  color: var(--conf-blue);
  font-weight: 700;
  line-height: 1;
}

.conf-next__date::after {
  content: "";
  position: absolute;
  left: 54px;
  top: 2px;
  width: 3px;
  height: 98px;
  background: currentColor;
  transform: rotate(28deg);
  transform-origin: top center;
}

.conf-next__month {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 48px;
}

.conf-next__day {
  position: absolute;
  left: 38px;
  right: auto;
  bottom: 0;
  font-size: 60px;
}

.conf-next__dow {
  margin: 8px 0 0;
  padding: 3px 0;
  border: 1px solid var(--conf-blue);
  color: var(--conf-blue);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
}

/* ---------- 公開内容の2カラム ---------- */
.conf-next__cols {
  position: relative;
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-width: 0;
  padding-left: 32px;
  border-left: 1px solid var(--conf-line);
}

.conf-next__col {
  min-width: 0;
}

.conf-next__col:first-child {
  padding-right: 32px;
}

.conf-next__col + .conf-next__col {
  position: relative;
  padding-right: 0;
  padding-left: 32px;
  padding-top: 32px;
  border-left: none;
}

/* 聴講予約側の区切り線は見出しの高さから下のみ */
.conf-next__col + .conf-next__col::before {
  content: "";
  position: absolute;
  left: 0;
  top: 32px;
  bottom: 0;
  width: 0;
  border-left: 1px solid var(--conf-line);
  background: none;
}

.conf-next__time {
  margin: 0 0 4px;
  color: var(--conf-blue);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}

.conf-next__lead {
  margin: 0;
  color: var(--conf-blue);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
}

.conf-next__desc {
  margin: 8px 0 0;
  color: var(--conf-text-sub);
  font-size: 12px;
  line-height: 1.8;
}

/* ---------- Stay Informed ---------- */
.conf-stay {
  margin-top: 32px;
  padding: 36px 40px;
  background: var(--conf-panel);
}

.conf-stay__desc {
  margin: 0;
  color: var(--conf-text-body);
  font-size: 12px;
  line-height: 1.7;
}

.conf-stay__groups {
  display: flex;
  flex-wrap: nowrap;
  align-items: flex-start;
  gap: 24px;
  margin-top: 20px;
}

.conf-stay__group {
  min-width: 0;
}

.conf-stay__group--news {
  flex: 1.5 1 0;
}

.conf-stay__group--sns {
  flex: 4 1 0;
}

.conf-stay__group .conf-subhead {
  margin: 0;
}

.conf-stay__btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0;
}

.conf-stay__group--sns .conf-stay__btns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.conf-stay__group--news .conf-stay__btns .btn,
.conf-stay__group--sns .conf-stay__btns .btn {
  width: 100%;
  box-sizing: border-box;
}

@media screen and (max-width: 1119px) {
  .conf-next__release {
    gap: 24px;
  }

  .conf-next__cols {
    gap: 0;
    padding-left: 24px;
  }

  .conf-next__col:first-child {
    padding-right: 24px;
  }

  .conf-next__col + .conf-next__col {
    padding-left: 24px;
    padding-right: 0;
  }

  .conf-stay__groups {
    flex-direction: column;
    gap: 24px;
  }

  .conf-stay__group--news,
  .conf-stay__group--sns {
    flex: none;
    width: 100%;
  }

  .conf-stay__group--sns .conf-stay__btns {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (max-width: 767px) {
  .conf-next__inner {
    padding: 40px 20px 48px;
  }

  .conf-next__box {
    margin-top: 20px;
  }

  .conf-next__release {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .conf-next__datebox {
    width: 100px;
    padding-right: 0;
    border-right: none;
    margin-right: 0;
  }

  .conf-next__datebox::after {
    display: none;
  }

  .conf-next__date {
    width: 88px;
    height: 88px;
  }

  .conf-next__date::after {
    left: 46px;
    height: 86px;
    transform: rotate(28deg);
  }

  .conf-next__month {
    font-size: 40px;
  }

  .conf-next__day {
    left: 32px;
    font-size: 52px;
  }

  .conf-next__dow {
    font-size: 11px;
  }

  .conf-next__cols {
    grid-template-columns: 1fr;
    gap: 16px;
    width: 100%;
    border-left: none;
    padding: 0;
    margin-top: 0;
    border-top: none;
  }

  .conf-next__cols::before {
    display: none;
  }

  .conf-next__col {
    padding-right: 0;
  }

  .conf-next__col:first-child .conf-next__time {
    position: relative;
    padding-bottom: 16px;
    margin-bottom: 12px;
  }

  .conf-next__col:first-child .conf-next__time::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: var(--conf-line);
  }

  .conf-next__col:first-child .conf-next__time::before {
    content: "";
    position: absolute;
    left: 1em;
    bottom: 0;
    z-index: 1;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 7px 9px 7px;
    border-color: transparent transparent var(--conf-line) transparent;
  }

  .conf-next__col + .conf-next__col {
    padding-left: 0;
    padding-top: 0;
    border-top: none;
  }

  .conf-next__col + .conf-next__col::before {
    display: none;
  }

  .conf-next__time {
    font-size: 20px;
  }

  .conf-next__lead {
    font-size: 15px;
  }

  .conf-stay {
    margin-top: 24px;
    padding: 28px 24px;
  }

  .conf-stay__groups {
    gap: 20px;
  }
}

/* 縦1列 */
@media screen and (max-width: 767px) {
  .conf-themes__inner {
    padding: 44px 20px 48px;
  }

  .conf-themes__bg {
    font-size: 48px;
  }

  .conf-themes__title {
    font-size: 20px;
  }

  .conf-themes__title-num {
    font-size: 26px;
  }

  .conf-themes__desc {
    margin-top: 12px;
    font-size: 13px;
    line-height: 1.8;
  }

  .conf-themes__list {
    row-gap: 16px;
    margin-top: 20px;
  }

  .conf-theme {
    flex-basis: 100%;
  }
}

@media screen and (max-width: 480px) {
  .conf-stay__group--sns .conf-stay__btns {
    grid-template-columns: 1fr;
  }

  /* add.css .btn { max-width: 280px } を打ち消し、SP は全幅 */
  .conf-stay__btns li {
    width: 100%;
  }

  .conf-stay__group--news .conf-stay__btns .btn,
  .conf-stay__group--sns .conf-stay__btns .btn {
    display: block;
    max-width: none;
  }
}