/* ===========================
   CSS カスタムプロパティ（色・サイズの定義）
   =========================== */
:root {
  --color-primary:      #1a3f7a;
  --color-primary-mid:  #2457a8;
  --color-green:        #09976b;
  --color-accent:       #f5a623;
  --color-bg:           #f0f4f9;
  --color-card:         #ffffff;
  --color-text:         #1a202c;
  --color-text-light:   #718096;
  --color-border:       #e2e8f0;
  --color-chiri:        #1a3f7a;
  --color-omoshiro:     #09976b;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.10);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 24px rgba(0,0,0,0.14);

  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  18px;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue',
          Arial, 'Noto Sans JP', sans-serif;

  --max-width:     1080px;
  --section-gap:   56px;
}

/* ===========================
   リセット
   =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  { font-family: var(--font); background: var(--color-bg); color: var(--color-text); line-height: 1.65; font-size: 16px; }
img   { max-width: 100%; height: auto; display: block; }
a     { color: inherit; text-decoration: none; }
button { font-family: var(--font); cursor: pointer; }

/* ===========================
   ユーティリティ
   =========================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}
.section-title {
  font-size: 1.4rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 28px;
  color: var(--color-primary);
}
.hidden { display: none !important; }

/* ===========================
   ナビゲーション
   =========================== */
.nav {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}
.nav-links { display: flex; gap: 6px; }
.nav-link {
  color: rgba(255,255,255,0.75);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.88rem;
  transition: background 0.2s, color 0.2s;
}
.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(255,255,255,0.2);
}

/* ===========================
   ヒーロー
   =========================== */
.hero {
  background: linear-gradient(140deg, #0d2b5e 0%, #1a5b9e 45%, #0a7c5b 100%);
  padding: 56px 16px 48px;
  text-align: center;
  color: #fff;
}
.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  opacity: 0.8;
  margin-bottom: 10px;
}
.hero-title {
  font-size: 1.85rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 10px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.hero-desc {
  font-size: 0.95rem;
  opacity: 0.85;
  margin-bottom: 32px;
}
.hero-btns {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.hero-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 270px;
  padding: 14px 24px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow-md);
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-chiri    { background: #fff; color: var(--color-chiri); }
.btn-omoshiro { background: rgba(255,255,255,0.15); color: #fff; border: 2px solid rgba(255,255,255,0.55); }

/* ===========================
   統計セクション
   =========================== */
.stats-section { padding: 24px 0 var(--section-gap); }
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.stat-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 22px 14px 20px;
  text-align: center;
  box-shadow: var(--shadow-md);
  border-top: 4px solid var(--color-border);
  transition: transform 0.2s;
}
.stat-card:hover { transform: translateY(-2px); }
.stat-card.chiri    { border-top-color: var(--color-chiri); }
.stat-card.omoshiro { border-top-color: var(--color-omoshiro); }

.stat-name  { font-size: 0.75rem; font-weight: 700; color: var(--color-text-light); margin-bottom: 12px; min-height: 2.2em; line-height: 1.3; }
.stat-block { margin-bottom: 10px; }
.stat-label { font-size: 0.7rem; color: var(--color-text-light); margin-bottom: 2px; }
.stat-value { font-size: 1.8rem; font-weight: 900; line-height: 1; color: var(--color-chiri); }
.stat-unit  { font-size: 0.9rem; font-weight: 600; }
.stat-card.omoshiro .stat-value { color: var(--color-omoshiro); }

/* ローディングアニメ */
.loading { animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.45} }
.stat-card.loading .stat-value { color: var(--color-border); }

/* ===========================
   最新動画セクション
   =========================== */
.videos-section { padding: var(--section-gap) 0; background: #fff; }
.tabs { display: flex; gap: 8px; margin-bottom: 22px; overflow-x: auto; padding-bottom: 2px; }
.tab-btn {
  flex-shrink: 0;
  padding: 9px 20px;
  border: 2px solid var(--color-border);
  border-radius: 50px;
  background: #fff;
  color: var(--color-text-light);
  font-size: 0.88rem;
  font-weight: 700;
  transition: all 0.2s;
}
.tab-btn.active.chiri-tab    { background: var(--color-chiri);    border-color: var(--color-chiri);    color: #fff; }
.tab-btn.active.omoshiro-tab { background: var(--color-omoshiro); border-color: var(--color-omoshiro); color: #fff; }

.videos-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.video-card {
  background: var(--color-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.video-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.video-card a     { display: block; }
.video-thumbnail  { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: var(--color-bg); }
.video-info       { padding: 12px 14px; }
.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-date { font-size: 0.77rem; color: var(--color-text-light); }
.video-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin-top: 5px;
  align-items: center;
}
.video-stat { font-size: 0.77rem; color: var(--color-text-light); }
.video-card.loading { height: 180px; background: var(--color-border); border: none; }

/* ===========================
   コメント表示
   =========================== */
.video-comments {
  border-top: 1px solid var(--color-border);
  padding: 10px 14px;
  background: var(--color-bg);
}
.comments-loading {
  font-size: 0.78rem;
  color: var(--color-text-light);
  text-align: center;
  padding: 6px 0;
  animation: pulse 1.4s ease-in-out infinite;
}
.comment-item {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}
.comment-item:last-child { border-bottom: none; }
.comment-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 3px;
}
.comment-author {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.comment-likes {
  font-size: 0.72rem;
  color: var(--color-text-light);
  flex-shrink: 0;
}
.comment-text {
  font-size: 0.82rem;
  color: var(--color-text);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===========================
   メッセージセクション
   =========================== */
.message-section { padding: var(--section-gap) 0; }
.message-card {
  background: linear-gradient(135deg, #fefefe, #f7faff);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  box-shadow: var(--shadow-md);
  border-left: 5px solid var(--color-accent);
}
.message-icon   { font-size: 2rem; margin-bottom: 10px; }
.message-title  { font-size: 1.05rem; font-weight: 800; color: var(--color-primary); margin-bottom: 12px; }
.message-text   { font-size: 0.93rem; line-height: 1.9; color: var(--color-text); white-space: pre-line; }
.message-author { font-size: 0.82rem; color: var(--color-text-light); margin-top: 16px; text-align: right; }

/* ===========================
   マイルストーンセクション
   =========================== */
.milestones-section { padding: var(--section-gap) 0; background: linear-gradient(180deg, #fff 0%, var(--color-bg) 100%); }
.milestones-list    { display: flex; flex-direction: column; gap: 12px; }
.milestone-item {
  background: var(--color-card);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}
.milestone-icon { font-size: 2rem; flex-shrink: 0; }
.milestone-text { font-weight: 700; font-size: 0.93rem; }
.milestone-date { font-size: 0.78rem; color: var(--color-text-light); margin-top: 3px; }

/* ===========================
   お知らせページ
   =========================== */
.news-list { display: flex; flex-direction: column; gap: 16px; padding-top: 8px; padding-bottom: 60px; }
.news-item {
  background: var(--color-card);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
}
.news-item-date  { font-size: 0.78rem; color: var(--color-text-light); margin-bottom: 6px; }
.news-item-title { font-size: 1rem; font-weight: 800; color: var(--color-primary); margin-bottom: 10px; }
.news-item-body  { font-size: 0.9rem; line-height: 1.8; white-space: pre-line; }

/* ===========================
   都道府県別ランキングセクション
   =========================== */
.ranking-section  { padding: var(--section-gap) 0; }
.ranking-subtitle {
  text-align: center;
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-top: -18px;
  margin-bottom: 24px;
}
.ranking-more-btn {
  display: inline-block;
  padding: 9px 28px;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.ranking-more-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.ranking-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}
.ranking-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-card);
  font-size: 0.92rem;
}
.ranking-table thead tr {
  background: var(--color-primary);
  color: #fff;
}
.ranking-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
}
.ranking-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.ranking-table tr:last-child td { border-bottom: none; }
.ranking-table tbody tr:hover td { background: var(--color-bg); }

.rank-num   { font-size: 1.1rem; text-align: center; width: 64px; }
.rank-pref  { font-weight: 700; }
.rank-count { color: var(--color-text-light); white-space: nowrap; }
.rank-views { font-weight: 700; color: var(--color-primary); white-space: nowrap; }

.rank-top-1 td { background: #fffbea; }
.rank-top-2 td { background: #f7f7f7; }
.rank-top-3 td { background: #fff5ee; }
.rank-top-1:hover td { background: #fef3c7; }
.rank-top-2:hover td { background: #efefef; }
.rank-top-3:hover td { background: #fde8d8; }

.ranking-loading {
  text-align: center;
  padding: 28px 16px;
  color: var(--color-text-light);
  font-size: 0.88rem;
  animation: pulse 1.4s ease-in-out infinite;
}

/* クリック展開 */
.ranking-row         { cursor: pointer; user-select: none; }
.ranking-row-open td { background: #e8f0fe !important; }
.rank-pref::after    { content: '  ▶'; font-size: 0.65rem; color: var(--color-text-light); }
.ranking-row-open .rank-pref::after { content: '  ▼'; }

/* 展開した動画グリッド */
.pref-videos-row > td { padding: 16px; background: #f0f5ff; }
.pref-videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}
.pref-video-card {
  display: block;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-card);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.pref-video-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.pref-video-card img  {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--color-bg);
}
.pref-video-title {
  padding: 7px 9px 3px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.pref-video-views {
  padding: 0 9px 8px;
  font-size: 0.7rem;
  color: var(--color-text-light);
}

/* ===========================
   フッター
   =========================== */
.footer {
  background: var(--color-primary);
  color: #fff;
  padding: 36px 16px;
  text-align: center;
}
.footer-logo  { font-size: 1rem; font-weight: 700; margin-bottom: 14px; opacity: 0.9; }
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.footer-links a {
  color: rgba(255,255,255,0.8);
  font-size: 0.88rem;
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.3);
  transition: all 0.2s;
}
.footer-links a:hover { color: #fff; border-color: #fff; background: rgba(255,255,255,0.12); }
.footer-copy { margin-top: 22px; font-size: 0.75rem; opacity: 0.45; }

/* ===========================
   エラー表示
   =========================== */
.api-error {
  text-align: center;
  padding: 28px 16px;
  color: var(--color-text-light);
  font-size: 0.88rem;
  line-height: 1.8;
}
.api-error code {
  background: var(--color-bg);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.85em;
}

/* ===========================
   レスポンシブ
   =========================== */
@media (min-width: 560px) {
  .hero-title   { font-size: 2.4rem; }
  .hero-btns    { flex-direction: row; justify-content: center; }
  .videos-grid  { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) {
  :root { --section-gap: 72px; }
  .section-title { font-size: 1.65rem; }
  .stat-value    { font-size: 2.2rem; }
  .hero-title    { font-size: 2.8rem; }
}
@media (min-width: 1024px) {
  .hero-title { font-size: 3.2rem; }
}