/* ===== 変数・ベース ===== */
:root {
  /* 青松English Hub 共通トンマナ（docs/design-system.md 準拠） */
  --bg: #f8f7f4;
  --bg-card: #ffffff;
  --text: #1a1714;
  --text-muted: #6b645c;
  --accent: #2d6a4f;
  --accent-hover: #1f5238;
  --accent-light: #d8f3dc;
  --border: #e2ddd8;
  --nav-bg: #ffffff;
  --hero-bg: #2d6a4f;
  --hero-text: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --font: -apple-system, BlinkMacSystemFont, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== ナビゲーションバー ===== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.site-nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* ポータルへ戻る導線（全アプリ共通・左上） */
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.site-logo:hover { color: var(--accent); }

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--accent);
  font-size: 0.85rem;
  line-height: 1;
}

.nav-sep {
  color: var(--border);
  flex-shrink: 0;
}

.site-nav-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.site-nav-badge {
  flex-shrink: 0;
  margin-left: auto;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0.2em 0.75em;
  white-space: nowrap;
}

/* ===== ヒーローセクション ===== */
.hero {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: 3rem 1.5rem 2.5rem;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero-eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0.8;
  letter-spacing: 0.06em;
}

.hero-title {
  margin: 0 0 0.3rem;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.3;
}

.hero-sub {
  margin: 0 0 1.75rem;
  font-size: 1rem;
  opacity: 0.75;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
}

.stat-num {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  opacity: 0.75;
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* ===== メイン ===== */
.main {
  flex: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

/* ===== 時間割（折りたたみ） ===== */
.time-details {
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.time-summary {
  list-style: none;
  padding: 0.85rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  user-select: none;
  transition: background 0.15s;
}

.time-summary:hover { background: var(--accent-light); }
.time-summary::-webkit-details-marker { display: none; }
.time-summary::marker { display: none; }

.collapse-icon {
  display: inline-block;
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.collapse-icon::before { content: "▼"; }

.time-details[open] .collapse-icon { transform: rotate(0deg); }
.time-details:not([open]) .collapse-icon { transform: rotate(-90deg); }

.time-details .time-table-card {
  margin-bottom: 0;
  border-radius: 0;
  border: none;
  border-top: 1px solid var(--border);
  box-shadow: none;
}

/* ===== 時間割テーブル ===== */
.time-table-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.time-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.time-table th,
.time-table td {
  padding: 0.55rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.time-table th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 10em;
}

.time-table tbody tr:last-child td { border-bottom: none; }
.time-table td:first-child {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

/* ===== 検索・フィルターエリア ===== */
.search-area {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.search-row {
  margin-bottom: 1rem;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.search-icon {
  font-size: 1rem;
  margin-right: 0.6rem;
  opacity: 0.55;
}

.search-input {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 0.7rem 0;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
}

.search-input::placeholder { color: var(--text-muted); }
.search-input:focus { outline: none; }

.search-clear {
  width: 26px;
  height: 26px;
  border: 0;
  background: var(--border);
  color: var(--text-muted);
  border-radius: 50%;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  margin-left: 0.4rem;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.search-clear:hover { background: var(--text-muted); color: #fff; }

/* ===== フィルター行 ===== */
.filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

/* 時間帯ピル */
.timeslot-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex: 1;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.35em 1em;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 500;
  font-family: inherit;
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}

.pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

/* 教室セレクト */
.filter-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.filter-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  letter-spacing: 0.03em;
}

.filter-select {
  padding: 0.38rem 0.7rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-family: inherit;
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s;
}
.filter-select:focus { outline: none; border-color: var(--accent); }

.result-count {
  margin: 0 0 0 auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.sort-hint {
  margin: 0.75rem 0 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===== スケジュールテーブル ===== */
.table-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.table-wrap { overflow-x: auto; }

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.schedule-table th,
.schedule-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.schedule-table thead {
  position: sticky;
  top: 56px; /* nav height */
  z-index: 1;
  background: var(--bg);
}

.schedule-table th {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  background: #eef1ec;
}

.schedule-table th.sortable {
  cursor: pointer;
  user-select: none;
  padding-right: 1.5rem;
  transition: background 0.15s;
}

.schedule-table th.sortable:hover { background: var(--border); }

.schedule-table th .sort-icon {
  font-size: 0.8em;
  opacity: 0.5;
  margin-left: 0.15em;
}

.schedule-table th.sort-asc .sort-icon,
.schedule-table th.sort-desc .sort-icon { display: none; }

.schedule-table th.sort-asc::after { content: " ▲"; font-size: 0.75em; opacity: 0.7; }
.schedule-table th.sort-desc::after { content: " ▼"; font-size: 0.75em; opacity: 0.7; }

.schedule-table .col-theme,
.schedule-table .col-detail { min-width: 180px; max-width: 320px; }

.schedule-table .col-detail { min-width: 220px; max-width: 400px; }

.schedule-table tbody tr { transition: background 0.12s; }

.schedule-table tbody tr.schedule-row-clickable { cursor: pointer; }

.schedule-table tbody tr.schedule-row-clickable:hover { background: var(--accent-light); }

.schedule-table tbody tr:last-child td { border-bottom: 0; }

.schedule-table .group-name-cell { font-weight: 600; color: var(--accent); }

.empty-row {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem 1rem !important;
}

/* ===== フッター ===== */
.site-footer {
  text-align: center;
  padding: 1.25rem 1.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.site-footer-text { margin: 0 0 0.2rem; }
.site-footer a { color: var(--accent); text-decoration: none; font-weight: 500; }
.site-footer a:hover { text-decoration: underline; color: var(--accent-hover); }

/* ===== グループ詳細ページ ===== */
.detail-header { margin-bottom: 1.5rem; }

.detail-header h1 { margin: 0 0 0.25rem; font-size: 1.4rem; font-weight: 700; }

.theme-title { margin: 0; font-size: 1rem; color: var(--text-muted); }

.text-muted { color: var(--text-muted); margin: 0; }

.meta-list { list-style: none; margin: 0.5rem 0 0; padding: 0; font-size: 0.9rem; color: var(--text-muted); }
.meta-list li { margin: 0.2rem 0; }

.back-link {
  display: inline-flex;
  align-items: center;
  margin-bottom: 1.25rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4em 0.75em;
  border-radius: var(--radius-pill);
  transition: color 0.15s, background 0.15s;
}
.back-link:hover { color: var(--accent-hover); background: var(--accent-light); }

.section-block {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.section-block h3 { margin: 0 0 0.75rem; font-size: 1rem; font-weight: 600; color: var(--text); }

.pdf-embed-wrap {
  position: relative;
  width: 100%;
  height: 480px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg);
}
.pdf-embed-wrap iframe { width: 100%; height: 100%; border: 0; }

.link-list { list-style: none; margin: 0.5rem 0 0; padding: 0; }
.link-list li { margin: 0.5rem 0; }
.link-list a { color: var(--accent); text-decoration: none; font-weight: 500; transition: color 0.15s; }
.link-list a:hover { color: var(--accent-hover); text-decoration: underline; }
.link-list a.external::after { content: " ↗"; font-size: 0.85em; }

.btn {
  display: inline-block;
  padding: 0.55rem 1.25rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  border: 0;
  cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--accent-hover); }

.btn-secondary { background: var(--text-muted); }
.btn-secondary:hover { background: #444; }

.loading, .error-message { text-align: center; padding: 2rem; color: var(--text-muted); }
.error-message { color: #b91c1c; font-weight: 500; }

/* ===== お知らせ ===== */
.site-notice {
  margin: 0 0 1.25rem;
  padding: 0.75rem 1.25rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  color: #92400e;
  font-size: 0.88rem;
}

/* ===== 閲覧ゲート（Google ログイン） ===== */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 2.5rem 2rem;
  max-width: 420px;
  width: 100%;
  text-align: center;
}

.auth-badge {
  display: inline-block;
  margin: 0 0 1rem;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0.2em 0.75em;
}

.auth-title {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.auth-desc {
  margin: 0 0 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.auth-button {
  display: flex;
  justify-content: center;
}

.auth-error {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: #b91c1c;
  font-weight: 500;
}

/* copyright inline */
.site-copyright-notice--inline {
  margin: 0 0 0.75rem;
  color: var(--text-muted);
  font-size: 0.7rem;
}

/* ===== レスポンシブ ===== */
@media (max-width: 600px) {
  .hero { padding: 2rem 1rem 1.75rem; }
  .hero-stats { gap: 1.5rem; }
  .stat-num { font-size: 1.6rem; }
  .main { padding: 1.25rem 1rem; }
  .search-area { padding: 1rem; }
  .filter-row { gap: 0.5rem 0.75rem; }
}

@media (max-width: 480px) {
  /* 狭い画面ではポータル導線と学内限定バッジを優先し、長いサイト名は省略 */
  .site-nav-inner { padding: 0 1rem; }
  .nav-sep, .site-nav-title { display: none; }
}