:root {
  --primary:    #1a4731;   /* 深緑 */
  --primary-lt: #2d6a4f;   /* 緑ライト */
  --accent:     #D4A017;   /* 金 */
  --accent-lt:  #f0c040;   /* 金ライト */
  --bg:         #f9f7f2;
  --card-bg:    #ffffff;
  --text:       #2c2c2c;
  --text-muted: #666666;
  --border:     #e0ddd5;
  --tag-bg:     #e8f5e9;
  --tag-text:   #1a4731;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }

/* ── Header ── */
header {
  background: var(--primary);
  color: white; padding: 0 20px;
  display: flex; align-items: center;
  justify-content: space-between;
  height: 56px; position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
header a { color: white; font-weight: 700; font-size: 1.1rem; }
header nav a {
  font-size: 0.85rem; font-weight: 500;
  margin-left: 16px; opacity: 0.85;
}
header nav a:hover { opacity: 1; color: var(--accent-lt); }

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lt) 100%);
  color: white; text-align: center; padding: 60px 20px 50px;
}
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: 12px; }
.hero h1 span { color: var(--accent-lt); }
.hero p { font-size: 1.1rem; opacity: 0.85; max-width: 600px; margin: 0 auto 24px; }
.hero-stats { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2rem; font-weight: 800; color: var(--accent-lt); }
.hero-stat .lbl { font-size: 0.8rem; opacity: 0.75; text-transform: uppercase; }

/* ── Search ── */
.search-bar {
  background: white; padding: 20px;
  border-bottom: 1px solid var(--border);
  display: flex; gap: 10px; justify-content: center;
  position: sticky; top: 56px; z-index: 99;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.search-bar input {
  width: 100%; max-width: 480px; padding: 10px 16px;
  border: 2px solid var(--border); border-radius: 8px;
  font-size: 1rem; outline: none;
}
.search-bar input:focus { border-color: var(--primary); }

/* ── Filter pills ── */
.filters {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 14px 20px; max-width: 1200px; margin: 0 auto;
}
.pill {
  padding: 5px 14px; border-radius: 20px; font-size: 0.82rem;
  cursor: pointer; border: 1.5px solid var(--border);
  background: white; transition: all 0.15s;
}
.pill:hover, .pill.active {
  background: var(--primary); color: white; border-color: var(--primary);
}

/* ── Grid ── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px; padding: 16px 20px 40px;
  max-width: 1200px; margin: 0 auto;
}
.card {
  background: var(--card-bg); border-radius: 10px;
  border: 1px solid var(--border);
  padding: 20px 18px; transition: box-shadow 0.15s, transform 0.15s;
  display: block;
}
.card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  transform: translateY(-2px);
}
.card .kanji { font-size: 2.2rem; line-height: 1; margin-bottom: 4px; }
.card .romaji { font-size: 1rem; font-weight: 700; color: var(--primary); }
.card .kana { font-size: 0.82rem; color: var(--text-muted); }
.card .meaning { font-size: 0.85rem; margin-top: 8px; color: var(--text); }
.card .tags { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 10px; }
.tag {
  background: var(--tag-bg); color: var(--tag-text);
  font-size: 0.72rem; padding: 2px 8px; border-radius: 10px;
}
.tag.gender-male   { background: #e3f2fd; color: #1565c0; }
.tag.gender-female { background: #fce4ec; color: #880e4f; }
.tag.gender-neutral{ background: #f3e5f5; color: #6a1b9a; }
.tag.era-samurai   { background: #fff3e0; color: #e65100; }
.tag.era-ancient   { background: #f9fbe7; color: #558b2f; }
.tag.era-classical { background: #ede7f6; color: #4527a0; }
.tag.anime         { background: #e0f7fa; color: #00695c; }
.tag.cute          { background: #fdf6e3; color: #c0862b; }
.tag.cool          { background: #e8eaf6; color: #283593; }

/* ── Detail page ── */
.detail-wrap {
  max-width: 800px; margin: 40px auto; padding: 0 20px 60px;
}
.detail-header {
  background: var(--primary); color: white;
  border-radius: 12px; padding: 40px; margin-bottom: 28px;
  text-align: center;
}
.detail-header .kanji-lg { font-size: 5rem; line-height: 1; }
.detail-header .romaji-lg { font-size: 1.8rem; font-weight: 800; margin-top: 8px; }
.detail-header .kana-lg { font-size: 1rem; opacity: 0.8; }
.detail-body { background: white; border-radius: 12px; padding: 32px; border: 1px solid var(--border); }
.detail-body h2 { font-size: 1rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 6px; margin-top: 24px; }
.detail-body h2:first-child { margin-top: 0; }
.detail-body p { font-size: 1rem; }
.detail-body .big-meaning { font-size: 1.4rem; font-weight: 600; color: var(--primary); }
.related-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px; margin-top: 8px;
}
.related-card {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; text-align: center; transition: border-color 0.15s;
}
.related-card:hover { border-color: var(--primary); }
.related-card .kanji { font-size: 1.6rem; }
.related-card .name  { font-size: 0.9rem; font-weight: 600; }

/* ── Category page ── */
.cat-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lt) 100%);
  color: white; padding: 40px 20px;
}
.cat-hero .back { color: rgba(255,255,255,0.75); font-size: 0.85rem; display: block; margin-bottom: 12px; }
.cat-hero h1 { font-size: 2rem; }
.cat-hero p  { opacity: 0.8; margin-top: 8px; }

/* ── Ad unit ── */
.ad-unit {
  text-align: center; padding: 20px 0; min-height: 90px;
}

/* ── Footer ── */
footer {
  background: var(--primary); color: rgba(255,255,255,0.7);
  text-align: center; padding: 28px 20px; font-size: 0.85rem;
}
footer a { color: var(--accent-lt); }

/* ── Top bar ── */
.top-bar { background: #1a1a1a; text-align: center; padding: 5px 0; font-size: .75rem; }
.top-bar-link { color: var(--accent); text-decoration: none; letter-spacing: .05em; font-weight: 600; }
.top-bar-link:hover { text-decoration: underline; }

/* ── Responsive ── */
@media(max-width:600px){
  .hero { padding: 40px 16px 32px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; padding: 12px; }
  header nav { display: none; }
}