/* ===== 基本設定 ===== */
:root {
  --page-bg: #f5f7fa;
  --card-bg: #ffffff;
  --text: #17202a;
  --muted: #59636e;
  --primary: #005bac;
  --primary-dark: #004684;
  --accent-bg: #eaf4fc;
  --border: #dbe2e8;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  --radius: 14px;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--page-bg);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    "Meiryo",
    sans-serif;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

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

a {
  color: var(--primary);
}

.container {
  width: min(calc(100% - 32px), var(--max-width));
  margin-inline: auto;
}

/* ===== ヘッダー ===== */
.site-header {
  padding: 40px 0 34px;
  color: #ffffff;
  background: linear-gradient(135deg, rgba(0, 91, 172, 0.98), rgba(0, 70, 132, 0.98));
}

.event-name {
  margin: 0 0 8px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 1.25;
}

.lead {
  max-width: 760px;
  margin: 20px 0 0;
  font-size: 1rem;
}

/* ===== メイン ===== */
main {
  padding-block: 36px 56px;
}

main h2 {
  margin: 0 0 22px;
  font-size: clamp(1.45rem, 5vw, 2rem);
  line-height: 1.35;
}

/* ===== 重要案内 ===== */
.important-info {
  margin-bottom: 36px;
  padding: 22px;
  background: var(--accent-bg);
  border-left: 6px solid var(--primary);
  border-radius: var(--radius);
}

.important-info h2 {
  margin-bottom: 10px;
  font-size: 1.35rem;
}

.important-info ul {
  margin: 0;
  padding-left: 1.3em;
}

/* ===== テーマカード ===== */
.theme-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.theme-card {
  display: flex;
  flex-direction: column;
  padding: 22px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.theme-card h3 {
  margin: 14px 0 10px;
  font-size: 1.28rem;
  line-height: 1.45;
}

.theme-number {
  align-self: flex-start;
  padding: 5px 12px;
  color: #ffffff;
  background: var(--primary);
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 800;
  text-align: center;
}

.theme-number .room {
  color: #ffffff;
  font-size: 0.92em;
  font-weight: 600;
  white-space: nowrap;
}

.theme-card p {
  margin: 0 0 22px;
  color: var(--muted);
}

.button-group {
  display: grid;
  gap: 10px;
  margin-top: auto;
}

/* ===== ボタン ===== */
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 10px 18px;
  color: #ffffff;
  background: var(--primary);
  border: 2px solid var(--primary);
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.button:hover,
.button:focus-visible {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

.button:active {
  transform: translateY(1px);
}

.button:focus-visible {
  outline: 3px solid rgba(0, 91, 172, 0.3);
  outline-offset: 3px;
}

.button-outline {
  color: var(--primary);
  background: #ffffff;
}

.button-outline:hover,
.button-outline:focus-visible {
  color: #ffffff;
  background: var(--primary);
}

.button-secondary {
  width: fit-content;
  background: #ffffff;
  color: var(--primary);
}

/* ===== スケジュール ===== */
.schedule-section {
  margin-top: 44px;
}

.schedule-note {
  margin: -10px 0 18px;
  color: var(--muted);
}

.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.schedule-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: #ffffff;
}

.schedule-table th,
.schedule-table td {
  padding: 12px 14px;
  border: 1px solid var(--border);
  vertical-align: middle;
}

.schedule-table th {
  color: #ffffff;
  background: var(--primary);
  text-align: center;
}

.schedule-table td:first-child,
.schedule-table td:nth-child(2) {
  white-space: nowrap;
  text-align: center;
  font-weight: 700;
}

.schedule-table td:nth-child(3),
.schedule-table td:nth-child(4) {
  text-align: center;
}

/* ===== 第2回案内 ===== */
.notice {
  margin-top: 36px;
  padding: 24px;
  background: #ffffff;
  border-left: 6px solid var(--primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.notice h2 {
  margin-bottom: 10px;
  font-size: 1.35rem;
}

.notice p {
  margin: 0 0 18px;
}

/* ===== フッター ===== */
.site-footer {
  padding: 24px 0;
  color: #ffffff;
  background: #263442;
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.92rem;
}

/* ===== タブレット以上 ===== */
@media (min-width: 700px) {
  .site-header {
    padding: 56px 0 48px;
  }

  main {
    padding-block: 48px 72px;
  }

  .theme-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .theme-card {
    padding: 26px;
  }

  .notice,
  .important-info {
    padding: 30px;
  }

  .button-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .button-group .button:only-child {
    grid-column: 1 / -1;
  }
}

/* ===== 動きを減らす設定への配慮 ===== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}
/* ===== 状態表示・ナビゲーション ===== */
.status-badge{display:inline-flex;align-items:center;width:fit-content;padding:4px 11px;border-radius:999px;font-size:.82rem;font-weight:800;line-height:1.5}
.status-ended{color:#44515e;background:#e7ebef}
.status-on-dark{margin-bottom:12px;color:#fff;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.55)}
.breadcrumb{display:flex;flex-wrap:wrap;gap:6px 10px;margin-bottom:26px;color:var(--muted);font-size:.92rem}
.archive-info{margin-bottom:24px;padding:18px 22px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.archive-info h2{margin-bottom:6px;font-size:1.2rem}.archive-info p{margin:0;color:var(--muted)}
/* ===== イベントポータル ===== */
.portal-header h1{max-width:850px}.portal-main{min-height:52vh}.event-grid{display:grid;grid-template-columns:1fr;gap:22px}
.event-card{display:flex;flex-direction:column;max-width:720px;padding:24px;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.event-card-header{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px}.event-year{margin:0;color:var(--muted);font-weight:700}
.event-card h3{margin:16px 0 10px;font-size:clamp(1.5rem,5vw,2rem);line-height:1.35}.event-card>p{margin:18px 0 24px;color:var(--muted)}
.event-card>.button{width:fit-content}.event-meta{display:grid;gap:6px;margin:8px 0 0}.event-meta>div{display:grid;grid-template-columns:5em 1fr;gap:10px}
.event-meta dt{color:var(--muted);font-weight:700}.event-meta dd{margin:0}

/* ===== 予定イベント・出展案内 ===== */
.status-planned{color:#075f38;background:#dff5e9}
.event-date{margin:0 0 12px;font-weight:700}
.event-link{margin:14px 0 0}
.warning-info{border-left-color:#d88900;background:#fff7df}
.booth-grid{display:grid;grid-template-columns:1fr;gap:22px}
.booth-card{overflow:hidden;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.booth-card>img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;border-bottom:1px solid var(--border)}
.booth-card-body{padding:22px}
.booth-card h3{margin:0 0 10px;font-size:1.5rem}
.booth-card p{color:var(--muted)}
@media (min-width:700px){
  .event-grid,.booth-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .event-card{max-width:none}
  .booth-card-body{padding:26px}
}

.booth-image-toggle { width: 100%; font: inherit; cursor: pointer; }