@charset "UTF-8";

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth; /* ヘッダーリンクのスムーススクロール */
  font-size: 62.5%;
}

body {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 1.6rem;
  color: #ffffff;
  background-color: #000000;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Background Video (全画面固定)
   ========================================================================== */
.video-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
}

.video-bg video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.4) 0%,
    rgba(0, 0, 0, 0.85) 100%
  );
}

/* ==========================================================================
   Layout Wrapper
   ========================================================================== */
.wrapper {
  position: relative;
  width: 100%;
}

.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 共通セクション */
.section {
  padding: 90px 0;
}

.section-title {
  font-size: 4rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 40px;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Header Navigation
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  /* 1. ほんのり透ける黒背景（85%の黒） */
  background-color: rgba(0, 0, 0, 0.85);

  /* 2. 背景を上品にボカす（すりガラス効果） */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  /* 3. 下方向へ広がる長めのぼけ足（影） */
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);

  /* 余白調整 */
  padding: 15px 0;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.site-logo img {
  height: 32px;
  width: auto;
  display: block;
}

.header-nav ul {
  display: flex;
  gap: 30px;
  list-style: none;
}

.header-nav a {
  color: #ffffff;
  text-decoration: none;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.header-nav a:hover {
  opacity: 1;
}

/* --------------------------------------------------
   ハンバーガーボタン（PC時は非表示）
-------------------------------------------------- */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 1001; /* ヘッダーより前面 */
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  position: absolute;
  left: 10px;
  transition: all 0.3s ease;
}

.hamburger span:nth-child(1) { top: 14px; }
.hamburger span:nth-child(2) { top: 21px; }
.hamburger span:nth-child(3) { top: 28px; }

/* ハンバーガー開閉アニメーション (×印) */
.hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------
   スマホ向けレイアウト (768px以下)
-------------------------------------------------- */
@media (max-width: 768px) {
  .hamburger {
    display: block; /* スマホでボタンを表示 */
  }

  /* スマホ用ドロワーメニュー */
  .header-nav {
    position: fixed;
    top: 0;
    right: -100%; /* 初期状態は画面外へ退避 */
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right 0.4s ease;
    z-index: 1000;
  }

  /* メニュー展開時 */
  .header-nav.is-active {
    right: 0;
  }

  .header-nav ul {
    flex-direction: column;
    align-items: center;
    gap: 32px; /* 縦並びの感覚 */
  }

  .header-nav a {
    font-size: 1.8rem; /* スマホで押しやすいフォントサイズ */
    font-weight: 700;
    letter-spacing: 0.1em;
  }
}

/* ==========================================================================
   Hero Section (ファーストビュー)
   ========================================================================== */
.hero-section {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 20px 60px;
}

.hero-section .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

/* Hero Title */
.hero-title {
  font-size: clamp(4rem, 6vw, 6.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.hero-subtitle {
  font-size: clamp(1.9rem, 3vw, 3.2rem);
  font-weight: 400;
  opacity: 0.9;
  margin-top: 4px;
}

/* Date */
.hero-date {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  font-size: clamp(2.2rem, 3.5vw, 3.5rem);
  font-weight: 700;
}

.hero-date .divider {
  width: 1px;
  height: 24px;
  background-color: rgba(255, 255, 255, 0.4);
}

.hero-date small {
  font-size: 2.1rem;
  font-weight: 400;
}

/* Location Badge */
.hero-location {
  display: inline-flex;
  align-items: center;
  background: rgba(22, 60, 138, 0.85);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 1.4rem;
  backdrop-filter: blur(4px);
}

.hero-location .badge {
  font-weight: 700;
  margin-right: 12px;
  text-transform: lowercase;
}

.hero-location .location-text {
  font-size: 1.5rem;
}

/* Countdown */
.hero-countdown {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 24px;
  border-radius: 8px;
  backdrop-filter: blur(4px);
  margin-top: 10px;
}

.countdown-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 44px;
}

.countdown-item .number {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.hero-countdown .colon {
  font-size: 1.8rem;
  font-weight: 700;
  opacity: 0.6;
  margin-top: -4px;
}

/* ==========================================================================
   Outline Section
   ========================================================================== */
.section-outline {
  background-color: #000000;
}

.outline-head {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 36px;
  letter-spacing: 0.03em;
}

.outline-list {
  display: grid;
  grid-template-columns: 240px 1fr;
  row-gap: 18px;
  column-gap: 24px;
  margin-bottom: 40px;
  padding-left: 6rem;
}

.outline-list dt {
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
}

.outline-list dd {
  color: #ffffff;
}

.official-link {
  text-align: center;
}

.text-link {
  color: #0066cc;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding-bottom: 2px;
  transition: opacity 0.2s ease;
  border-bottom: 1px solid #0066cc;
}

.text-link:hover {
  opacity: 0.8;
  color: #004499;
  border-bottom: 1px solid #004499;
}

.text-link .arrow {
  font-size: 0.7em;
  margin-left: 4px;
}

.program-list {
  padding-left: 6rem;
  margin-bottom: 48px;
}
.program-list h3 {
  font-size: 1.8rem;
  margin-bottom: 12px;
}
.program-list p {
  line-height: 2;
}
.program-list a {
  color: #0066cc; 
  text-decoration: underline; 
  transition: color 0.2s ease;
}

.program-list a:hover {
  color: #004499; 
}


/* ==========================================================================
   Access Section (白背景エリア)
   ========================================================================== */
.section-access {
  background-color: #ffffff;
  color: #000000;
  padding-bottom: 0;
  width: 100%;
}

.title-dark {
  color: #000000;
}

.access-info {
  margin-bottom: 35px;
  width: 100%;
  text-align: left;
}

/* PC時：会場名と住所を横並びにする設定 */
.venue-header {
  display: flex;
  align-items: baseline; /* テキストの下揃え */
  gap: 20px; /* 会場名と住所の間隔 */
  margin-bottom: 12px;
  flex-wrap: wrap; /* 万が一画面が狭い場合も綺麗に折り返す */
}

.venue-name {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
}

.venue-address {
  font-size: 1.4rem;
  color: #555555;
  margin-bottom: 0; /* マージンをリセット */
}

.access-routes {
  list-style: none;
  font-size: 1.4rem;
}

.access-routes li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 4px;
  color: #333333;
}

.access-routes li::before {
  content: "・";
  position: absolute;
  left: 0;
}
.map-container {
  width: 100%;
  height: 480px; 
  background-color: #e5e5e5;
}

/* ==========================================================================
   Back Number Section
   ========================================================================== */
.section-backnumber {
  background-color: #000000;
  text-align: center;
}

.btn-blue {
  display: inline-block;
  background: #1e4596;
  color: #ffffff;
  text-decoration: none;
  padding: 12px 36px;
  border-radius: 50px;
  font-size: 1.5rem;
  font-weight: 700;
  transition: background-color 0.2s ease;
}

.btn-blue:hover {
  background: #2856b6;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: #000000;
  padding: 30px 20px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Responsive (SP / Mobile)
   ========================================================================== */
@media (max-width: 768px) {
  .header {
    padding: 15px 20px;
  }

  .header-nav ul {
    gap: 45px;
  }

  .section {
    padding: 60px 0;
  }
  .hero-date small {
    font-size: 1.5rem;
    font-weight: 400;
  }

  .outline-list {
    grid-template-columns: 1fr;
    row-gap: 4px;
    padding-left: 0;
  }
  .program-list {
    padding-left: 0;
  }

  .outline-list dt {
    margin-top: 12px;
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 0.6);
  }

  .map-container {
    height: 280px;
  }

  .venue-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 16px;
  }
  .section.section-access {
    padding-bottom: 0;
  }
}

/* ==========================================================================
   Hero Section (ファーストビュー) 関連の補足
   ========================================================================== */
.hero-section {
  position: relative; /* スクロール誘導の絶対配置基準 */
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 20px 80px;
}

/* ==========================================================================
   Sponsor Section (白背景エリア)
   ========================================================================== */
.section-sponsor {
  background-color: #ffffff;
  color: #000000;
  padding: 70px 0;
  width: 100%;
}

/* スポンサーセクション内のコンテナのみ横幅を広く確保 */
.section-sponsor .container {
  max-width: 1100px; /* ロゴが余裕をもって並ぶ横幅 */
}

.sponsor-group {
  width: 100%;
  text-align: center;
  margin-bottom: 24px;
}

.sponsor-rank {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  position: relative;
  display: inline-block;
}

/* 下部のアクセントライン */
.sponsor-rank::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background-color: #1e4596;
}

/* ロゴリスト全体の親枠 */
.sponsor-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center; /* ★ 横方向の中央揃え */
  align-items: center;     /* ★ 縦方向の中央揃え */
  gap: 20px 24px;
  list-style: none;
  width: 100%;
  padding: 0;
  margin: 0 auto;          /* ★ ブロック自体の左右中央配置 */
}

/* 各ロゴの枠 */
.sponsor-item {
  width: calc((100% - 96px) / 5);
  min-width: 200px;
  max-width: 260px;
  height: 80px;
  display: flex;
  align-items: center;     /* ★ 枠内での縦中央揃え */
  justify-content: center;  /* ★ 枠内での横中央揃え */
  padding: 8px;
  margin: 0 auto;          /* ★ 念のため追加 */
}

/* リンクタグ（a）が入っても枠いっぱいに広げて中央揃えを保持 */
.sponsor-item a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  text-decoration: none;
}

/* 画像自体の制御 */
.sponsor-item img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  margin: 0 auto;          /* ★ 画像自体も中央寄稿 */
  opacity: 0.85;
  transition: all 0.3s ease;
}

/* ホバー時の効果 */
.sponsor-item a:hover img,
.sponsor-item img:hover {
  opacity: 1;
}

/* ==========================================================================
   Responsive (SP / Mobile) - Sponsor
   ========================================================================== */
@media (max-width: 768px) {
  /* スマホ時: 横2列ベースで中央寄せ */
  .sponsor-list {
    gap: 16px 20px;
  }

  .sponsor-item {
    width: calc((100% - 20px) / 2);
    max-width: 160px;
    height: 50px;
  }
}

/* ==========================================================================
   Privacy Policy Page Style
   ========================================================================== */
.privacy-page {
  background-color: #ffffff;
  color: #333333;
  padding: 140px 0 90px; /* ヘッダーとの被りを防ぐ上部パディング */
}

.privacy-page .container {
  max-width: 860px;
}

.page-title {
  font-size: 3.6rem; /* 36px */
  font-weight: 800;
  text-align: center;
  color: #000000;
  margin-bottom: 50px;
}

.privacy-section {
  margin-bottom: 40px;
}

.privacy-heading {
  font-size: 1.8rem; /* 18px */
  font-weight: 700;
  color: #000000;
  margin-bottom: 16px;
}

.privacy-section p {
  font-size: 1.4rem; /* 14px */
  line-height: 1.8;
  margin-bottom: 12px;
}

.privacy-subblock {
  margin-top: 24px;
}

.privacy-subblock h3 {
  font-size: 1.5rem; /* 15px */
  font-weight: 700;
  color: #000000;
  margin-bottom: 8px;
}

.privacy-list {
  list-style: none;
  padding-left: 0;
  margin-top: 8px;
}

.privacy-list li {
  font-size: 1.4rem; /* 14px */
  line-height: 1.8;
  position: relative;
  padding-left: 16px;
  margin-bottom: 4px;
}

.privacy-list li::before {
  content: "・";
  position: absolute;
  left: 0;
  top: 0;
}

.contact-name {
  margin-top: 16px;
}

.privacy-page a {
  color: #1e4596;
  text-decoration: underline;
}

.privacy-page a:hover {
  text-decoration: none;
}

.privacy-note {
  margin-top: 20px;
  font-size: 1.3rem; /* 13px */
  color: #666666;
}

@media (max-width: 768px) {
  .privacy-page {
    padding: 100px 0 60px;
  }

  .page-title {
    font-size: 2.8rem;
    margin-bottom: 30px;
  }
}

/* --------------------------------------------------------------------------
   Scroll Indicator (スクロール誘導)
   -------------------------------------------------------------------------- */
.scroll-indicator {
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: #ffffff;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.3s ease;
  z-index: 10;
}

.scroll-indicator:hover {
  opacity: 1;
}

.scroll-text {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* 下向きの矢印（ラインデザイン） */
.scroll-arrow {
  width: 16px;
  height: 16px;
  border-right: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;
  transform: rotate(45deg);
  animation: scrollBounce 2s infinite ease-in-out;
}

/* ふわふわと上下に揺れるアニメーション */
@keyframes scrollBounce {
  0%, 100% {
    transform: rotate(45deg) translate(0, 0);
  }
  50% {
    transform: rotate(45deg) translate(6px, 6px);
  }
}

/* ==========================================================================
   Program Page Styles (New Grid & Card Accordion)
   ========================================================================== */
.program-page {
  padding: 130px 0 100px;
  background-color: #000000;
  color: #ffffff;
}

.program-page .container {
  max-width: 1140px;
}

/* タイトルエリアを中央（またはデザイン通り）に調整 */
.program-header-row {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  margin-bottom: 40px;
}

.program-page .page-title {
  font-size: 6rem;
  font-weight: 800;
  text-align: center;
  color: #ffffff;
}

.day-select {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background-color: #1a3673;
  color: #ffffff;
  border: 1px solid #2e52a4;
  padding: 8px 32px 8px 16px;
  font-size: 1.4rem;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg fill='white' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

/* DAY バナー (青いバー) */
.day-block {
  margin-bottom: 60px;
}

.day-banner {
  background-color: #1a3673;
  color: #ffffff;
  font-size: 4rem;
  font-weight: 800;
  padding: 10px 24px;
  text-align: center;
  letter-spacing: 0.05em;
  border-radius: 2px;
  margin-bottom: 30px;
}

.day-banner span {
  font-size: 3.2rem;
  font-weight: 500;
  margin-left: 12px;
}

/* 時間帯の行 */
.time-row {
  margin-bottom: 36px;
}

.time-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px; /* 文字と線の間の余白 */
  font-size: 3rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  border-bottom: none; /* 既存の下線を消去 */
  padding-bottom: 0;
}
/* 左右の線（疑似要素） */
.time-header::before,
.time-header::after {
  content: "";
  flex: 1; /* 空きスペース全体に線を伸ばす */
  height: 1px;
  background-color: #ffffff; /* 線の色（デザインに合わせて調整可） */
}

/* カードグリッド構造 (PCは可変列、スマホは1列) */
.card-grid {
  display: grid;
  gap: 16px;
  align-items: start;
}

.card-grid.cols-1 { grid-template-columns: 1fr; }
.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

/* プログラムカード本体 (右上斜めカット) */
.program-card {
  background-color: #ffffff;
  color: #000000;
  border-radius: 4px;
  /* 右上斜めカットの角丸デザイン */
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.program-card.js-accordion {
  cursor: pointer;
}

.program-card.js-accordion:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 255, 255, 0.15);
}

/* --- 2カラム幅統合・空枠用の追加スタイル --- */

/* 2列分の幅にする指定 */
.program-card.span-2 {
  grid-column: span 2;
}

/* 4列分の幅（1行すべて）にする指定（オープニング等を1行全幅にする場合） */
.program-card.span-4 {
  grid-column: span 4;
}

/* C・D部屋などの空枠用スタイル */
.program-card.empty {
  background-color: transparent; /* 背景を透明に */
  box-shadow: none;
  clip-path: none;                 /* 斜めカットを解除 */
  min-height: 120px;               /* 空枠でも一定の高さを確保して列を揃える */
  cursor: default;
  pointer-events: none;            /* アコーディオン等のクリックを無効化 */
}

/* カード上部 (サマリー) */
.card-summary {
  padding: 16px 20px;
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #e5e5e5;
}

.session-id {
  font-size: 1.3rem;
  font-weight: 700;
  color: #111111;
}

/* バッジ */
.badge {
  font-size: 1.1rem;
  font-weight: 700;
  padding: 2px 8px;
  color: #ffffff;
  border-radius: 2px;
}
.badge-red { background-color: #e60012; }
.badge-orange { background-color: #ff9900; }
.badge-blue { background-color: #0066cc; }

.card-title {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.4;
  color: #000000;
  margin-bottom: 12px;
}

.card-speaker {
  font-size: 1.3rem;
  color: #444444;
  margin-bottom: 8px;
}

.card-more-btn {
  font-size: 1.1rem;
  color: #666666;
  text-align: right;
  margin-top: 8px;
  font-weight: 500;
}

/* アコーディオンが開いているときは右下の「詳細を見る ▼」を非表示 */
.program-card.is-open .card-more-btn {
  display: none;
}

/* ==========================================================================
   アコーディオン開閉部分 (CSS Grid ぬるぬるアニメーション)
   ========================================================================== */
.card-detail {
  display: grid;
  grid-template-rows: 0fr; /* 初期状態：高さ0 */
  transition: grid-template-rows 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  border-top: 0px solid transparent;
}

/* 開いた状態 */
.program-card.is-open .card-detail {
  grid-template-rows: 1fr; /* 中身の本当の高さへスムーズに展開 */
  border-top: 1px solid #e5e5e5;
}

.detail-inner {
  overflow: hidden;
  padding: 0 20px; /* 上下パディング初期値0 */
  background-color: #ffffff;
  transition: padding 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.program-card.is-open .detail-inner {
  padding: 20px; /* 開いたときに上下パディングをつける */
}

.detail-text {
  font-size: 1.3rem;
  line-height: 1.7;
  color: #222222;
  margin-bottom: 24px;
}

/* 登壇者一覧 */
.speaker-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.speaker-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.speaker-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: #dddddd;
  overflow: hidden;
  flex-shrink: 0;
}

.speaker-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.speaker-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: #000000;
}

.speaker-prof {
  font-size: 1.2rem;
  color: #666666;
}

/* ==========================================
   登壇者リスト汎用パーツ (Card & Detail 共通)
   ========================================== */

.speaker-list {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 16px; /* 登壇者同士の間隔 */
}

.speaker-item {
  display: flex;
  align-items: flex-start;
  gap: 12px; /* アイコンとテキストの間隔 */
}

/* 丸型アイコン表示枠 */
.speaker-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid #cccccc;
  background-color: #9a9a9a; /* 画像がない場合のグラフィック用背景カラー */
  overflow: hidden;
  flex-shrink: 0; /* 横幅がつぶれるのを防止 */
  position: relative;
}

/* 人型SVGアイコン（ダミー用） */
.speaker-avatar::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml;utf8,<svg fill='%23ffffff' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><path d='M12 12c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm0 2c-2.67 0-8 1.34-8 4v2h16v-2c0-2.66-5.33-4-8-4z'/></svg>");
  background-size: 70%;
  background-position: center;
  background-repeat: no-repeat;
}

.speaker-avatar img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 名前とプロフィールのテキストグループ */
.speaker-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 48px;
}

.speaker-name {
  font-size: 1.4rem;
  font-weight: 700;
  color: #111111;
  line-height: 1.3;
  margin-bottom: 2px;
}

.speaker-prof {
  font-size: 1.2rem;
  color: #555555;
  line-height: 1.4;
  margin: 0;
}

/* 閉じるボタン */
.close-btn-wrap {
  text-align: center;
  padding-top: 16px;
  margin-top: 20px;
  border-top: 1px dashed #e5e5e5;
}

.card-close-btn {
  background-color: #f0f0f0;
  border: 1px solid #cccccc;
  border-radius: 4px;
  font-size: 1.2rem;
  font-weight: 700;
  color: #333333;
  cursor: pointer;
  padding: 8px 24px;
  display: inline-block;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.card-close-btn:hover {
  background-color: #e0e0e0;
  border-color: #999999;
}

.day2-placeholder {
  text-align: center;
  color: #888888;
  font-size: 1.5rem;
  padding: 40px 0;
}

.text-cols-4 {
  text-align: center;
  font-size: 2.4rem;
  font-weight: 600;
  background: #ffffff;
  color: #000000;
  padding: 12px;
  border-radius: 4px;
}

/* ==========================================
   LT募集中ボタン
   ========================================== */
.lt-btn-wrap {
  text-align: center;
  margin-top: 32px;
}

.lt-btn {
  display: inline-block;
  width: 45%;
  background: linear-gradient(135deg, #1a3673 0%, #2e52a4 100%);
  color: #ffffff;
  font-size: 2rem;
  font-weight: 700;
  padding: 14px 40px;
  border-radius: 30px; /* 丸みのあるピル型デザイン */
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(26, 54, 115, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  position: relative;
  margin-bottom: 36px;
}

.lt-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 82, 164, 0.4);
  background: linear-gradient(135deg, #2e52a4 0%, #3b66cb 100%);
}
/* --------------------------------------------------
   スマホ対応 (768px以下) - 縦1列に落とし込み
-------------------------------------------------- */
@media (max-width: 768px) {
  .program-page {
    padding: 100px 0 60px;
  }

  .program-header-row {
    flex-direction: column;
    gap: 16px;
  }

  .program-page .page-title {
    font-size: 2.8rem;
  }

  .day-select {
    position: static;
    transform: none;
  }
  .day-banner {
    font-size: 3rem;
  }
  .day-banner span {
    font-size: 2rem;
  }
  .time-header {
    font-size: 2.4rem;
  }

  /* PCで複数列だったグリッドをスマホでは全て1列に統一 */
  .card-grid.cols-2,
  .card-grid.cols-3,
  .card-grid.cols-4 {
    grid-template-columns: 1fr;
  }

  /* スマホでは2列・4列幅の指定を解除して1列にする */
  .program-card.span-2,
  .program-card.span-4 {
    grid-column: span 1;
  }

  /* スマホ表示時に空枠を非表示 */
  .program-card.empty {
    display: none;
  }

  .card-title {
    font-size: 1.5rem;
  }
  .card-grid.cols-4:first-of-type {
    display: none; /* スマホでは最上部の「Track A~D」ヘッダーを非表示にする */
  }
  .text-cols-4 {
    font-size: 1.8rem;
  }
  .lt-btn {
    font-size: 1.4rem;
    padding: 12px 28px;
    width: 80%; /* スマホではタップしやすいよう少し太めに */
    max-width: 300px;
  }
}