/* ===================================================
   ガバフェス2026 - スタイルシート
   テーマ: つなぐ / ガバナンス研究科グリーン×ダークネイビー
   =================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&family=Noto+Serif+JP:wght@400;700&display=swap');

/* ---------- CSS カスタムプロパティ ---------- */
:root {
  /* ガバナンス研究科カラー（グリーン系） */
  --color-primary:     #2e8b57;  /* シーグリーン */
  --color-primary-lt:  #3aab6a;
  --color-primary-dk:  #1e6b3e;
  --color-accent:      #4caf7d;  /* エメラルドグリーン */
  --color-accent-lt:   #6dcf9a;
  --color-accent-dk:   #2e9458;

  --color-navy:        #1a2e22;  /* ダークグリーン寄りネイビー */
  --color-navy-lt:     #243b2e;
  --color-bg:          #f5f9f6;
  --color-surface:     #ffffff;
  --color-text:        #1a2e22;
  --color-text-muted:  #5a7566;
  --color-border:      #c8e0d0;

  /* ヒーログラデーション: ダークグリーン → グリーン → 明るいグリーン */
  --grad-hero: linear-gradient(135deg, #0e2418 0%, #1e6b3e 50%, #3aab6a 100%);
  --grad-section: linear-gradient(180deg, #f5f9f6 0%, #eaf4ee 100%);

  --radius-sm:  8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-sm:  0 2px 8px rgba(46,139,87,0.10);
  --shadow-md:  0 8px 32px rgba(46,139,87,0.14);
  --shadow-lg:  0 16px 64px rgba(46,139,87,0.18);

  --font-sans:  'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Serif JP', serif;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- リセット ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 18px; /* 文字サイズを全体的に大きく（16px→18px）調整 */
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a  { color: inherit; text-decoration: none; }

/* ---------- ユーティリティ ---------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section--alt {
  background: var(--grad-section);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary-dk);
  background: rgba(46, 139, 87, 0.10);
  border: 1px solid rgba(46, 139, 87, 0.28);
  border-radius: 99px;
  padding: 4px 14px;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 640px;
}

/* ---------- ナビゲーション ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(14, 36, 24, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background var(--transition);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
}

.nav__logo img {
  height: 48px;
  width: auto;
  display: inline-block;
  max-width: 180px;
}

.nav__links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
  letter-spacing: 0.03em;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-accent);
}

/* ハンバーガー（モバイル） */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: rgba(255,255,255,0.8);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--grad-hero);
  padding-top: 64px;
}

/* 背景装飾 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(76,175,125,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 10% 80%, rgba(58,171,106,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* ヒーロー背景画像（acacomo） */
.hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: saturate(0.6) brightness(0.5);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 48px 24px;
}

.hero__year {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s ease forwards 0.2s;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 10vw, 6.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero__theme {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-weight: 700;
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.7s ease forwards 0.6s;
}

.hero__theme::before { content: '「'; color: rgba(76,175,125,0.5); }
.hero__theme::after  { content: '」'; color: rgba(76,175,125,0.5); }

.hero__concepts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeIn 0.8s ease forwards 0.9s;
}

.hero__concepts-prefix {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent-lt);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(76, 175, 125, 0.4);
  padding: 4px 12px;
  border-radius: 99px;
  letter-spacing: 0.05em;
}

.hero__concept-tag {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  color: rgba(255,255,255,0.9);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 99px;
  letter-spacing: 0.03em;
  transition: background var(--transition), border-color var(--transition);
}

.hero__concept-tag:hover {
  background: rgba(76,175,125,0.25);
  border-color: rgba(76,175,125,0.5);
}

.hero__desc {
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: rgba(255,255,255,0.78);
  max-width: 680px;
  margin: 0 auto 48px;
  line-height: 2;
  opacity: 0;
  animation: fadeIn 0.8s ease forwards 1.0s;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 32px 40px;
  justify-content: center;
  opacity: 0;
  animation: fadeIn 0.8s ease forwards 1.2s;
}

.hero__meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  font-weight: 500;
}

.hero__meta-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(76,175,125,0.18);
  border: 1px solid rgba(76,175,125,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

/* 一般参加案内文 */
.hero__invite {
  margin: 48px auto 64px;
  max-width: 620px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(76, 175, 125, 0.3);
  border-radius: var(--radius-md);
  padding: 28px 36px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  animation: fadeIn 0.8s ease forwards 1.3s;
  box-shadow: 0 8px 32px rgba(14, 36, 24, 0.2);
}

.hero__invite-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: var(--color-accent);
  color: var(--color-navy);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.hero__invite-text {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.8;
}

/* スクロールインジケーター */
.hero__scroll {
  display: none;
}

/* ---------- 開催概要セクション ---------- */
.overview__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.overview__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.overview__card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
}

.overview__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.overview__card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.overview__card-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.overview__card-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.5;
  margin-bottom: 8px;
}

.overview__card-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 会場画像ブロック */
.venue-image {
  margin-top: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.venue-image img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  display: block;
}

.venue-image__caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(14,36,24,0.85), transparent);
  color: #fff;
  padding: 24px 28px 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ---------- 参加者への事前案内 ---------- */
.participant-guide {
  background: #eaf4ee;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: 64px;
}

.participant-guide__highlights {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin: 32px 0 24px;
  padding: 24px 28px;
  color: #fff;
  background: var(--color-primary-dk);
  border-radius: var(--radius-md);
}

.participant-guide__highlights strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.3rem;
  line-height: 1.5;
}

.participant-guide__highlights span {
  display: block;
  font-size: 0.9rem;
}

.participant-guide__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.participant-guide__card {
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
}

.participant-guide__card h3 {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-primary-dk);
  font-size: 1.15rem;
}

.participant-guide__card ul {
  padding-left: 1.4em;
}

.participant-guide__card li + li {
  margin-top: 14px;
}

.participant-guide__card--media {
  grid-column: 1 / -1;
}

@media (max-width: 768px) {
  .participant-guide__highlights,
  .participant-guide__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .participant-guide__highlights,
  .participant-guide__card {
    padding: 24px 20px;
  }

  .participant-guide .pc-only {
    display: none;
  }
}

/* ---------- タイムラインセクション ---------- */
.timeline {
  margin-top: 56px;
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent), var(--color-primary-lt));
  border-radius: 2px;
}

.timeline__group {
  margin-bottom: 48px;
}

.timeline__group-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-navy);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  padding: 6px 20px;
  border-radius: 99px;
  margin-bottom: 20px;
  margin-left: -44px;
  position: relative;
}

.timeline__group-label::before {
  content: '';
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(76,175,125,0.22);
}

.timeline__item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -38px;
  top: 28px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 3px var(--color-primary-lt);
}

.timeline__item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.timeline__time {
  min-width: 140px;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.timeline__title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-navy);
  margin-bottom: 4px;
}

.timeline__note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.timeline__resource {
  margin-top: 16px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary-dk);
}

.timeline__resource a {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.timeline__badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 99px;
  margin-left: 8px;
  vertical-align: middle;
}

.timeline__badge--open {
  background: rgba(76,175,125,0.12);
  color: var(--color-accent-dk);
  border: 1px solid rgba(76,175,125,0.3);
}

.timeline__badge--closed {
  background: rgba(46,139,87,0.1);
  color: var(--color-primary);
  border: 1px solid rgba(46,139,87,0.2);
}

.program-notice {
  margin: 24px 0 40px;
  padding: 16px 20px;
  background: rgba(220, 100, 50, 0.07);
  border: 1px solid rgba(220, 100, 50, 0.22);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.86rem;
  line-height: 1.7;
}

.program-notice p {
  margin: 0;
}

.program-notice p + p {
  margin-top: 5px;
}

/* ---------- パネルディスカッション ---------- */
.panel-discussion {
  margin-top: 24px;
  display: grid;
  gap: 20px;
}

.panel-discussion__speakers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.panel-speaker {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  padding: 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.panel-speaker__photo {
  width: 84px;
  aspect-ratio: 1 / 1;
  flex: 0 0 auto;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.panel-speaker__name {
  margin: 0 0 4px;
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-navy);
}

.panel-speaker__role {
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.panel-discussion__topics {
  padding: 20px 22px;
  background: rgba(46,139,87,0.05);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 0.9rem;
  line-height: 1.8;
}

.panel-discussion__topics p {
  margin: 0;
}

.panel-discussion__status {
  display: inline-block;
  margin-bottom: 10px !important;
  padding: 3px 10px;
  background: rgba(220, 100, 50, 0.12);
  color: #c04000;
  border: 1px solid rgba(220, 100, 50, 0.3);
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 700;
}

@media (max-width: 600px) {
  .panel-discussion__speakers {
    grid-template-columns: 1fr;
  }

  .panel-speaker__photo {
    width: 72px;
  }

  .panel-discussion__topics {
    padding: 18px;
  }
}

/* ---------- ワークショップ・分科会（講義形式） ---------- */
.sessions-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
}

.sessions-info__header {
  margin-bottom: 24px;
}

.sessions-info__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 4px;
}

.sessions-info__note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.sessions-info__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.session-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  align-items: start;
  gap: 20px;
}

.session-card__photo {
  width: 120px;
  height: 120px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.session-card__photo--minamoto {
  object-position: center 48%;
}

.session-card__content {
  min-width: 0;
}

.session-card__type {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary-dk);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 10px;
}

.session-card__teacher {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-navy);
  margin: 0 0 4px;
}

.session-card__affiliation {
  margin: 0 0 16px;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.session-card__label {
  display: inline-block;
  margin: 12px 0 6px;
  padding: 2px 8px;
  border-radius: 99px;
  background: rgba(46,139,87,0.1);
  color: var(--color-primary-dk);
  font-size: 0.75rem;
  font-weight: 700;
}

.session-card__theme {
  margin: 0;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-navy);
}

.session-card__theme span {
  display: block;
  margin-top: 4px;
  font-size: 0.88rem;
  font-weight: 500;
}

.session-card__summary {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-text);
}

.session-card__pending {
  display: inline-block;
  margin: 0;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 700;
  background: rgba(220, 100, 50, 0.12);
  color: #c04000;
  border: 1px solid rgba(220, 100, 50, 0.3);
  border-radius: 99px;
}

@media (max-width: 900px) {
  .sessions-info__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .sessions-info {
    padding: 28px 18px;
  }

  .session-card {
    grid-template-columns: 88px minmax(0, 1fr);
    padding: 18px;
    gap: 14px;
  }

  .session-card__photo {
    width: 88px;
    height: 88px;
  }

  .session-card__type {
    font-size: 0.88rem;
  }

  .session-card__teacher {
    font-size: 1.05rem;
  }
}

@media (max-width: 360px) {
  .session-card {
    grid-template-columns: 1fr;
  }

  .session-card__photo {
    width: 104px;
    height: 104px;
  }
}

/* ---------- 参加要項セクション ---------- */
.fee__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: 28px;
  margin-top: 48px;
  margin-bottom: 56px;
}

.fee__card {
  border-radius: var(--radius-lg);
  padding: 40px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.fee__card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.fee__card--part1 {
  background: linear-gradient(135deg, var(--color-navy), var(--color-primary));
  color: #fff;
}

.fee__card--part2 {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-dk));
  color: #fff;
}

.fee__card::after {
  content: '';
  position: absolute;
  bottom: -40px; right: -40px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
}

.fee__part-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 8px;
}

.fee__part-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.4;
}

.fee__amount {
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 4px;
}

.fee__amount span {
  font-size: 1.2rem;
  font-weight: 500;
  opacity: 0.8;
  margin-left: 4px;
}

.fee__details {
  font-size: 0.9rem;
  opacity: 0.78;
  line-height: 1.6;
  margin-top: 16px;
}

/* 申込セクション */
.apply__box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.apply__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-navy);
  margin-bottom: 12px;
}

.apply__note {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 99px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-dk));
  color: #fff;
  box-shadow: 0 4px 16px rgba(46,139,87,0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(46,139,87,0.4);
}

/* ---------- 幹事セクション ---------- */
.organizers__group-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.organizers__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.organizer__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.organizer__card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-lt);
}

.organizer__name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-navy);
  line-height: 1.4;
}

.organizer__cohort {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(46,139,87,0.1);
  color: var(--color-primary-dk);
  border: 1px solid rgba(46,139,87,0.25);
  border-radius: 99px;
  padding: 1px 8px;
  margin-top: 3px;
}

.organizer__card--faculty {
  background: linear-gradient(135deg, rgba(30,107,62,0.05), rgba(46,139,87,0.04));
  border-color: rgba(46,139,87,0.2);
}

.organizer__card--faculty .organizer__avatar {
  background: linear-gradient(135deg, var(--color-navy), var(--color-primary));
}

.organizer__title {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-top: 2px;
}

/* ---------- 関連資料・校歌 ---------- */
#resources,
#reports {
  scroll-margin-top: 80px;
}

.resource-card {
  margin-top: 32px;
  padding: 28px clamp(20px, 4vw, 32px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.resource-card__label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary-dk);
}

.resource-card h3 {
  margin: 8px 0 12px;
  font-family: var(--font-serif);
  font-size: 1.35rem;
}

.resource-card__file {
  margin: 16px 0;
  font-weight: 700;
}

.resource-card .btn {
  max-width: 100%;
  padding: 12px 24px;
}

.resource-card__note {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.school-song {
  margin-top: 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.school-song__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px;
  color: var(--color-primary-dk);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-md);
}

.school-song__toggle::-webkit-details-marker { display: none; }
.school-song__toggle:hover { background: var(--color-bg); }
.school-song__toggle:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 4px;
}

.school-song__show,
.school-song__hide { flex-shrink: 0; font-size: 0.8rem; }
.school-song__hide,
.school-song[open] .school-song__show { display: none; }
.school-song[open] .school-song__hide { display: inline; }

.school-song__body {
  padding: 24px clamp(16px, 4vw, 32px) 32px;
  border-top: 1px solid var(--color-border);
}

.school-song__credits,
.school-song__source {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.school-song__verses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 32px;
  margin: 28px 0;
}

.school-song__verse h3 {
  margin-bottom: 12px;
  color: var(--color-primary-dk);
  font-size: 1rem;
}

.school-song__verse p {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 2.2;
  overflow-wrap: anywhere;
}

.school-song__source a { text-decoration: underline; }

/* ---------- フッター ---------- */
.footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 32px;
}

.footer__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 32px;
}

.footer__brand {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.footer__brand span { color: var(--color-accent); }

.footer__tagline {
  font-size: 0.875rem;
  opacity: 0.6;
}

.footer__info { text-align: right; }

.footer__info-item {
  font-size: 0.875rem;
  margin-bottom: 4px;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer__copy {
  font-size: 0.8rem;
  opacity: 0.4;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  list-style: none;
}

.footer__links a {
  font-size: 0.8rem;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.footer__links a:hover {
  opacity: 1;
  color: var(--color-accent);
}

/* ---------- スクロールアニメーション ---------- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- キーフレーム ---------- */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(-8px); }
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(14,36,24,0.97);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  .nav__hamburger { display: flex; }

  .section { padding: 64px 0; }

  .timeline { padding-left: 20px; }
  .timeline__item { flex-direction: column; gap: 8px; }
  .timeline__time { min-width: unset; }
  .timeline__group-label { margin-left: -32px; font-size: 0.8rem; padding: 4px 14px; }

  .footer__top { flex-direction: column; }
  .footer__info { text-align: left; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }

  .apply__box { padding: 32px 24px; }
  .fee__card { padding: 28px; }
  .fee__amount { font-size: 2.2rem; }

  .hero__invite {
    margin: 36px 16px 48px;
    padding: 20px 24px;
  }
}

@media (max-width: 480px) {
  .hero__meta { flex-direction: column; align-items: center; }
  .organizers__grid { grid-template-columns: 1fr 1fr; }
}