/* ========== CSS 基本設定 ========== */
:root {
  --accent: #1f6feb; /* JESPAブルー */
  --bg: #ffffff;
  --text: #111318;
  --muted: #5b6370;
  --line: #e6e8eb;
  --card: #f7f8fa;
  --radius: 14px;
  --space: 24px;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Noto Sans JP', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent); }

.container { width: min(1040px, 100% - 40px); margin-inline: auto; }
.section { padding-block: 56px; }
.section.alt { background: var(--card); }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.link-more { text-decoration: none; font-size: 14px; }

.skip-link { position: absolute; left: -9999px; top: 0; background: #000; color: #fff; padding: 8px 12px; }
.skip-link:focus { left: 8px; z-index: 1000; }

/* ========== ヘッダー / ナビ ========== */
.site-header { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--line); }
.header-grid { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; padding-block: 12px; }
.brand { font-weight: 700; text-decoration: none; color: inherit; font-size: 18px; }
.nav ul { margin: 0; padding: 0; list-style: none; display: flex; gap: 16px; }
.nav a { text-decoration: none; color: inherit; padding: 8px 10px; border-radius: 10px; }
.nav a:hover { background: var(--card); }
.menu-toggle { display: none; border: 1px solid var(--line); background: #fff; padding: 8px 12px; border-radius: 10px; }

@media (max-width: 760px) {
  .menu-toggle { display: inline-block; }
  .nav { display: none; }
  .nav.open { display: block; grid-column: 1/-1; }
  .nav ul { flex-direction: column; gap: 8px; padding-bottom: 8px; }
}

/* ========== Hero ========== */
.hero { padding-block: 40px 24px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; align-items: center; }
.hero-compact .kaigi-cta-grid { align-items: start; }
.hero h1 { margin: 0 0 8px; font-size: clamp(24px, 3.2vw, 36px); }
.hero p { color: var(--muted); margin: 0 0 16px; }
.hero-figure img { border-radius: var(--radius); }

/* ========== 共通ボタン/通知 ========== */
.btn { display: inline-block; padding: 10px 16px; border: 1px solid var(--line); border-radius: 12px; text-decoration: none; color: inherit; background: #fff; }
.btn:hover { border-color: #c9ced6; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.notice { margin-top: 12px; padding: 12px; border-left: 4px solid var(--accent); background: #edf5ff; border-radius: 6px; }
.small { font-size: 13px; }
.muted { color: var(--muted); }

/* ========== カード / グリッド ========== */
.grid { display: grid; gap: 16px; }
.cards { grid-template-columns: repeat(12, 1fr); }
.cards > .card { grid-column: span 4; }
@media (max-width: 1024px) { .cards > .card { grid-column: span 6; } }
@media (max-width: 640px) { .cards > .card { grid-column: span 12; } }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; display: grid; gap: 8px; }
.card-title { margin: 0; font-size: 18px; }
.card-link { text-decoration: none; font-weight: 500; }
.meta { display: flex; gap: 10px; align-items: baseline; color: var(--muted); font-size: 14px; }
.tag { background: var(--accent); color: #fff; border-radius: 999px; font-size: 12px; padding: 2px 8px; }


/* ========== About / Contact グリッド ========== */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; align-items: center; }
.about-figure img { border-radius: var(--radius); }
.contact-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 24px; align-items: start; }

@media (max-width: 920px) {
  .hero-grid,
  .about-grid,
  .contact-grid,
  .privacy-grid { grid-template-columns: 1fr; }
}

/* ========== 学術集会（kaigi） ========== */
.hero-compact { padding-block: 32px; }
.kaigi-cta-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 24px; align-items: start; }
.kaigi-summary { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.kaigi-summary li { display: grid; grid-template-columns: 88px 1fr; gap: 12px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; }
.kaigi-summary span { color: var(--muted); }

.two-col-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
@media (max-width: 920px) { .two-col-grid { grid-template-columns: 1fr; } }

.program-grid {
  grid-template-columns: repeat(12, 1fr);
}

/* プログラムのカードだけ中身を上揃えにする */
.program-grid > .card {
  grid-column: span 6;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  gap: 8px;
}

@media (max-width: 920px) {
  .program-grid > .card {
    grid-column: span 12;
  }
}

.map-embed { aspect-ratio: 16 / 9; background: #dfe6ee; border-radius: var(--radius); border: 1px solid var(--line); display: grid; place-items: center; overflow: hidden; }

/* ========== フッター ========== */
.site-footer { border-top: 1px solid var(--line); background: #fff; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; padding-block: 18px; }
.footer-grid a { text-decoration: none; color: inherit; margin-left: 16px; }
.footer-grid a:hover { text-decoration: underline; }

/* ========== 細かなUI ========== */
ul.checklist { padding-left: 1.2em; }
ul.checklist li { list-style: '✔ '; margin-bottom: 6px; }
ul.bullets { padding-left: 1.2em; }
ul.bullets li { list-style: disc; margin-bottom: 6px; }



/* ▼ カード全体をリンクに（本文は通常の文字色） */
a.card-link-area {
  display: block;
  color: var(--text);      /* 本文と同じ色 (#111318) */
  text-decoration: none;   /* 下線なし */
}

/* フォーカス/ホバー時も下線なしでOK */
a.card-link-area:hover,
a.card-link-area:focus,
a.card-link-area:visited {
  color: var(--text);
  text-decoration: none;
}

/* ▼ 「学術集会へ」だけ他のカードと同じ青にする */
.card-link-area .card-link {
  color: var(--accent);    /* = #1f6feb JESPAブルー */
  text-decoration: none;
  font-weight: 500;
}

/* ホバー時も下線は出さない（色はそのまま） */
.card-link-area .card-link:hover {
  color: var(--accent);
  text-decoration: none;
}