/* ナイトブラNAVI - メインスタイル */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #faf9f7;
  --color-white: #ffffff;
  --color-beige: #e8e0d5;
  --color-beige-light: #f2ede8;
  --color-brown: #8b6f5e;
  --color-brown-dark: #6b4f3f;
  --color-brown-light: #c4a898;
  --color-text: #3d2e26;
  --color-text-light: #7a6b62;
  --color-border: #ddd5cc;
  --font-base: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  --radius: 8px;
  --shadow: 0 2px 12px rgba(139,111,94,0.10);
}

body {
  font-family: var(--font-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 15px;
}

a { color: var(--color-brown-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ===== ヘッダー ===== */
.site-header {
  background: var(--color-white);
  border-bottom: 2px solid var(--color-beige);
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px 6px rgba(139,111,94,0.07);
}
.header-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.site-logo {
  font-size: 20px; font-weight: 700;
  color: var(--color-brown-dark);
  letter-spacing: 0.05em;
}
.site-logo span { color: var(--color-brown-light); font-size: 13px; font-weight: 400; display: block; }

.site-nav { display: flex; gap: 8px; list-style: none; }
.site-nav a {
  padding: 6px 14px; border-radius: 20px;
  font-size: 13px; font-weight: 600;
  color: var(--color-brown-dark);
  transition: background 0.2s;
}
.site-nav a:hover { background: var(--color-beige-light); text-decoration: none; }

/* ===== ヒーロー ===== */
.hero {
  background: linear-gradient(135deg, var(--color-beige-light) 0%, var(--color-beige) 100%);
  padding: 64px 20px;
  text-align: center;
}
.hero-title {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 700;
  color: var(--color-brown-dark);
  line-height: 1.4;
  margin-bottom: 16px;
}
.hero-sub {
  font-size: 15px; color: var(--color-text-light);
  margin-bottom: 28px;
}
.hero-badge {
  display: inline-block;
  background: var(--color-brown);
  color: #fff;
  font-size: 13px; font-weight: 700;
  padding: 6px 18px; border-radius: 20px;
  margin-bottom: 32px;
}
.hero-btn {
  display: inline-block;
  background: var(--color-brown-dark);
  color: #fff;
  font-size: 15px; font-weight: 700;
  padding: 14px 36px; border-radius: 30px;
  box-shadow: 0 4px 14px rgba(107,79,63,0.25);
  transition: transform 0.2s, box-shadow 0.2s;
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(107,79,63,0.3); text-decoration: none; }

/* ===== セクション共通 ===== */
.section { padding: 56px 20px; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-title {
  font-size: 22px; font-weight: 700;
  color: var(--color-brown-dark);
  margin-bottom: 8px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-brown-light);
}
.section-lead { font-size: 14px; color: var(--color-text-light); margin-bottom: 32px; }
.section-bg { background: var(--color-beige-light); }

/* ===== ランキング ===== */
.ranking-list { display: flex; flex-direction: column; gap: 20px; }
.ranking-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex; align-items: center; gap: 20px;
  padding: 20px;
  position: relative;
  overflow: hidden;
}
.rank-badge {
  min-width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700; color: #fff;
  flex-shrink: 0;
}
.rank-1 { background: linear-gradient(135deg, #c9a227, #e8c94a); }
.rank-2 { background: linear-gradient(135deg, #8c9ca8, #b0c0cc); }
.rank-3 { background: linear-gradient(135deg, #b87333, #d4956a); }

.rank-info { flex: 1; }
.rank-name { font-size: 17px; font-weight: 700; color: var(--color-brown-dark); margin-bottom: 4px; }
.rank-stars { color: #d4a017; font-size: 14px; margin-bottom: 4px; }
.rank-desc { font-size: 13px; color: var(--color-text-light); }
.rank-coming { font-size: 12px; color: var(--color-brown-light); font-style: italic; }

/* ===== カテゴリ ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.category-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 24px;
  transition: transform 0.2s, box-shadow 0.2s;
  display: block;
}
.category-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(139,111,94,0.15); text-decoration: none; }
.category-icon { font-size: 36px; margin-bottom: 12px; }
.category-name { font-size: 17px; font-weight: 700; color: var(--color-brown-dark); margin-bottom: 6px; }
.category-desc { font-size: 13px; color: var(--color-text-light); }

/* ===== 新着記事 ===== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.article-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  transition: transform 0.2s;
  display: block;
}
.article-card:hover { transform: translateY(-3px); text-decoration: none; }
.article-tag {
  display: inline-block;
  background: var(--color-beige);
  color: var(--color-brown);
  font-size: 11px; font-weight: 700;
  padding: 2px 10px; border-radius: 10px;
  margin-bottom: 8px;
}
.article-title { font-size: 15px; font-weight: 700; color: var(--color-brown-dark); margin-bottom: 6px; line-height: 1.5; }
.article-meta { font-size: 12px; color: var(--color-text-light); }

/* ===== フッター ===== */
.site-footer {
  background: var(--color-brown-dark);
  color: rgba(255,255,255,0.85);
  padding: 40px 20px 24px;
  text-align: center;
}
.footer-nav { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; margin-bottom: 20px; list-style: none; }
.footer-nav a { color: rgba(255,255,255,0.8); font-size: 13px; }
.footer-nav a:hover { color: #fff; }
.footer-copy { font-size: 12px; color: rgba(255,255,255,0.5); }

/* ===== レスポンシブ ===== */
@media (max-width: 680px) {
  .header-inner { flex-direction: column; height: auto; padding: 12px 16px; gap: 8px; }
  .site-nav { flex-wrap: wrap; justify-content: center; }
  .ranking-item { flex-direction: column; text-align: center; }
}