/* ==========================================================================
   共通ナビゲーション & フッター 統一スタイル (CSS)
   ========================================================================== */

/* --- 1. 共通ナビゲーション (上部ヘッダー) --- */
#common-nav-container,
#nav-tools {
  width: 100%;
  max-width: 1080px;
  margin: 12px auto 20px auto;
  padding: 0 12px;
  box-sizing: border-box;
}

.tool-nav,
nav.tool-nav {
  display: flex !important;
  flex-wrap: wrap !important;
  justify-content: center !important;
  align-items: center !important;
  gap: 8px 10px !important;
  padding: 8px 12px !important;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.tool-nav a,
nav.tool-nav a {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: #334155;
  text-decoration: none;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  transition: all 0.15s ease-in-out;
  white-space: nowrap;
}

.tool-nav a:hover,
nav.tool-nav a:hover {
  background: #f1f5f9;
  color: #0f172a;
  border-color: #94a3b8;
  transform: translateY(-1px);
}

/* 現在地アクティブ表示 */
.tool-nav a.active,
.tool-nav a[aria-current="page"] {
  background: #2563eb !important;
  color: #ffffff !important;
  border-color: #1d4ed8 !important;
  font-weight: 600 !important;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.25);
}

/* --- 2. 共通フッター (下部) --- */
#common-footer-container,
#footer-container,
#shared-footer {
  width: 100%;
  max-width: 1080px;
  margin: 40px auto 24px auto;
  padding: 0 12px;
  box-sizing: border-box;
}

.common-footer {
  width: 100%;
  padding: 24px 16px;
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
  border-radius: 12px;
  box-sizing: border-box;
  text-align: center;
}

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

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 10px;
  font-size: 0.875rem;
}

.footer-nav a {
  color: #475569;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}

.footer-nav a:hover {
  color: #1e293b;
  text-decoration: underline;
}

.footer-copy {
  margin: 0;
  font-size: 0.75rem;
  color: #94a3b8;
  letter-spacing: 0.02em;
}

/* --- 3. スマホ・タブレット最適化 (レスポンシブ) --- */
@media (max-width: 640px) {
  .tool-nav,
  nav.tool-nav {
    gap: 6px !important;
    padding: 6px 8px !important;
  }
  .tool-nav a,
  nav.tool-nav a {
    padding: 5px 10px;
    font-size: 0.8rem;
  }
  .footer-nav {
    gap: 6px 8px;
    font-size: 0.8rem;
  }
}