/* ===========================
   第37回 日本産婦人科・新生児血液学会学術集会
   スタイルシート
=========================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary:    #8B1A4A;
  --color-secondary:  #C4547A;
  --color-accent:     #B5363A;
  --color-light-pink: #F7D6E0;
  --color-cream:      #FDF5F0;
  --color-cream-dark: #F5E8DD;
  --color-text:       #333333;
  --color-text-light: #777777;
  --color-white:      #FFFFFF;
  --sidebar-width:    185px;
  --layout-max:       1000px;
  --font-ja:          'Noto Serif JP', 'Yu Mincho', 'YuMincho', '游明朝', serif;
  --font-base:        'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
}

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background-color: var(--color-cream);
  line-height: 1.7;
  font-size: 16px;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--color-secondary); }

img { max-width: 100%; height: auto; display: block; }

/* ===========================
   レイアウト全体
   max-width で中央配置 → サイドバー左側に余白が生まれる
=========================== */
.layout-wrapper {
  max-width: var(--layout-max);
  margin: 0 auto;
  display: flex;
  min-height: 100vh;
}

/* ===========================
   左サイドバー (通常フロー、画像横に配置)
=========================== */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background-color: var(--color-primary);
  display: flex;
  flex-direction: column;
}

/* ナビゲーション
   padding-top: 110px → ホームボタンを開催概要(3番目)の位置に配置
   flex: 1 を外してナビが縦いっぱいに伸びないようにする → ポスターがナビ直下に表示される */
.sidebar-nav {
  padding: 110px 0 0;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav ul li a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 14px 14px;      /* さらに+20% (12→14px) */
  color: rgba(255,255,255,0.85);
  font-size: 15px;          /* 14→15px に拡大 */
  letter-spacing: 0.03em;
  transition: background-color 0.18s, color 0.18s;
  border-left: 3px solid transparent;
  line-height: 1.4;
}
.sidebar-nav ul li a:hover {
  background-color: rgba(255,255,255,0.13);
  color: var(--color-white);
  border-left-color: rgba(255,255,255,0.5);
}
.sidebar-nav ul li a.active {
  background-color: rgba(255,255,255,0.18);
  color: var(--color-white);
  border-left-color: var(--color-white);
  font-weight: 600;
}
.sidebar-nav ul li a.nav-coming-soon {
  color: rgba(255,255,255,0.35);
}
.sidebar-nav ul li a.nav-coming-soon:hover {
  background-color: transparent;
  color: rgba(255,255,255,0.35);
  border-left-color: transparent;
}

.nav-icon {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  fill: currentColor;
  opacity: 0.85;
}

/* サイドバー下部コピーライト：フッターにのみ表示するため非表示 */
.sidebar-footer {
  display: none;
}

/* ポスターダウンロードセクション
   margin-top: 50px の空白 */
.sidebar-poster {
  margin-top: 50px;
  padding: 0 8px 0;
}
.sidebar-banner {
  margin-top: 15px;
  padding: 0 8px 28px;
}
.sidebar-banner-link {
  display: block;
}
.sidebar-banner-link img {
  width: 100%;
  height: auto;
  border-radius: 3px;
  transition: opacity 0.2s;
}
.sidebar-banner-link:hover img {
  opacity: 0.80;
}
.sidebar-poster-label {
  font-size: 11.5px;
  font-weight: 600;
  color: rgba(255,255,255,0.78);
  letter-spacing: 0.06em;
  text-align: center;
  margin-bottom: 8px;
  border-top: 1px solid rgba(255,255,255,0.18);
  padding-top: 10px;
}
.sidebar-poster-link {
  display: block;
}
.sidebar-poster-link img {
  width: 100%;
  height: auto;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 3px;
  transition: opacity 0.2s, transform 0.2s;
}
.sidebar-poster-link:hover img {
  opacity: 0.80;
  transform: scale(1.02);
}

/* ===========================
   メインコンテンツ
=========================== */
.main-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ===========================
   ヒーロー画像 (ホームのみ)
   width: 100% / height: auto で左右余白なしに画像を全幅表示
=========================== */
.hero {
  background-color: var(--color-cream);
}

.hero img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===========================
   お知らせセクション
=========================== */
.section {
  padding: 48px 36px;
}
.section--alt {
  background-color: var(--color-cream-dark);
}

.section-inner {
  max-width: 100%;
}

.section-title {
  font-family: var(--font-ja);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 24px;
  padding-bottom: 10px;
  position: relative;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--color-light-pink);
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 56px;
  height: 2px;
  background: var(--color-primary);
}

/* お知らせリスト */
.news-list {
  list-style: none;
  background: var(--color-white);
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  overflow: hidden;
}
.news-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid #F0E8E4;
  transition: background-color 0.15s;
  flex-wrap: wrap;
}
.news-list li:last-child { border-bottom: none; }
.news-list li:hover { background-color: #FDF8F6; }

.news-date {
  font-size: 12.5px;
  color: var(--color-text-light);
  white-space: nowrap;
  margin-top: 2px;
  flex-shrink: 0;
  font-family: 'Courier New', monospace;
}
.news-badge {
  display: inline-block;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 3px;
  flex-shrink: 0;
  margin-top: 3px;
  letter-spacing: 0.04em;
}
.news-text {
  font-size: 13.5px;
  color: var(--color-text);
  line-height: 1.65;
  flex: 1;
  min-width: 180px;
}

/* ===========================
   ページヘッダー (下層ページ)
   高さ約80% + 学会名表示
=========================== */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #A52A5A 100%);
  padding: 18px 32px 20px;
}

.page-hero-conf {
  font-family: var(--font-ja);
  font-size: 11px;
  color: rgba(255,255,255,0.72);
  letter-spacing: 0.06em;
  margin-bottom: 5px;
  font-weight: 400;
}

.page-hero h1 {
  font-family: var(--font-ja);
  color: var(--color-white);
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
}

.page-hero .breadcrumb {
  margin-top: 6px;
  font-size: 11px;
  color: rgba(255,255,255,0.58);
}
.page-hero .breadcrumb a {
  color: rgba(255,255,255,0.75);
}
.page-hero .breadcrumb a:hover { color: var(--color-white); }

/* ===========================
   準備中ページ
=========================== */
.coming-soon-box {
  max-width: 520px;
  margin: 54px auto;
  background: var(--color-white);
  border-radius: 12px;
  padding: 50px 36px;
  text-align: center;
  box-shadow: 0 4px 18px rgba(0,0,0,0.07);
}
.coming-soon-icon {
  width: 64px;
  height: 64px;
  background: var(--color-light-pink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.coming-soon-icon svg {
  width: 32px;
  height: 32px;
  fill: var(--color-primary);
}
.coming-soon-box h2 {
  font-family: var(--font-ja);
  font-size: 17px;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.coming-soon-box p {
  color: var(--color-text-light);
  font-size: 13.5px;
  line-height: 1.9;
}
.btn-home {
  display: inline-block;
  margin-top: 24px;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 28px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background-color 0.2s, transform 0.1s;
}
.btn-home:hover {
  background-color: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* ===========================
   フッター
=========================== */
#site-footer {
  background-color: #3D0A22;
  color: rgba(255,255,255,0.75);
  padding: 36px 36px 20px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 24px;
}

.footer-block h3 {
  font-family: var(--font-ja);
  color: var(--color-white);
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 9px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255,255,255,0.18);
  letter-spacing: 0.05em;
}
.footer-block address {
  font-size: 11.5px;
  line-height: 2;
  font-style: normal;
}
.footer-block a {
  color: rgba(255,255,255,0.60);
}
.footer-block a:hover { color: var(--color-white); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 16px;
  text-align: center;
  font-size: 10.5px;
  color: rgba(255,255,255,0.38);
}

/* ===========================
   ハンバーガー (モバイルのみ表示)
=========================== */
.hamburger-btn {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  border: none;
  border-radius: 5px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.hamburger-btn span {
  display: block;
  width: 19px;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: all 0.3s;
}
.hamburger-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.open span:nth-child(2) { opacity: 0; }
.hamburger-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 150;
}
.sidebar-overlay.show { display: block; }

/* ===========================
   レスポンシブ
=========================== */
@media (max-width: 860px) {
  .hamburger-btn { display: flex; }

  /* サイドバーをオーバーレイドロワーに切替 */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 230px;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.32s ease;
    overflow-y: auto;
    box-shadow: none;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 18px rgba(0,0,0,0.3);
  }

  /* ハンバーガーボタン（top:12px / height:40px）と重ならないよう
     サイドバーナビの先頭に余白を確保（デスクトップの110pxを上書き） */
  .sidebar-nav {
    padding-top: 68px;
  }

  /* モバイルではポスターセクションの上マージンを縮小 */
  .sidebar-poster {
    margin-top: 24px;
  }

  /* メインコンテンツは全幅 */
  .layout-wrapper {
    display: block;
    max-width: 100%;
  }

  .section { padding: 36px 20px; }
  .page-hero { padding: 48px 20px 22px; }  /* モバイルはハンバーガー分余白 */
  #site-footer { padding: 30px 20px 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 480px) {
  .coming-soon-box { padding: 36px 20px; margin: 36px 14px; }
}