/**
 * モダンなナビゲーションスタイル
 * ドロップダウンメニュー対応
 */

/* ========================================
   グローバルナビゲーション - 基本設定
   ======================================== */
#gnav {
  background: linear-gradient(135deg, #9d0000 0%, #7d0000 100%);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 90;
}

ul#mainnav {
  width: 960px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
}

/* ========================================
   メインメニュー項目
   ======================================== */
ul#mainnav > li {
  position: relative;
  flex: 1;
  margin: 0;
  padding: 0;
  height: 40px;
  overflow: visible;
}

ul#mainnav > li > a {
  display: block;
  padding: 0 15px;
  height: 40px;
  line-height: 40px;
  color: #ffffff;
  font-weight: bold;
  font-size: 14px;
  text-align: center;
  text-decoration: none;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

ul#mainnav > li:last-child > a {
  border-right: none;
}

/* ホバーエフェクト */
ul#mainnav > li > a:hover,
ul#mainnav > li > a.open {
  background-color: rgba(0, 0, 0, 0.15);
}

ul#mainnav > li > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background-color: #ffffff;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

ul#mainnav > li > a:hover::after,
ul#mainnav > li > a.open::after {
  width: 80%;
}

/* ========================================
   ドロップダウンメニュー
   ======================================== */

/* ドロップダウンメニュー */
ul#mainnav li ul {
  position: absolute !important;
  top: 100% !important;
  left: 0 !important;
  min-width: 280px !important;
  width: max-content !important;
  max-width: 400px !important;
  margin: 0 !important;
  padding: 8px 0 !important;
  list-style: none;
  background-color: #ffffff !important;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15) !important;
  border-radius: 0 0 4px 4px !important;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 100 !important;
  display: block !important;
}

ul#mainnav li:hover > ul {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ========================================
   ドロップダウン項目
   ======================================== */
ul#mainnav li ul li {
  width: 100% !important;
  height: 40px !important;
  margin: 0 !important;
  padding: 0 !important;
  border-bottom: 1px solid #f0f0f0 !important;
  position: relative;
}

/* サブメニューへのホバーエリアを右側に拡張 */
ul#mainnav li ul li::after {
  content: '';
  position: absolute;
  top: 0;
  right: -5px;
  width: 6px;
  height: 100%;
  background: transparent;
  z-index: 1;
}

ul#mainnav li ul li:last-child {
  border-bottom: none !important;
}

ul#mainnav li ul li a {
  display: block !important;
  padding: 0 20px !important;
  height: 40px !important;
  line-height: 40px !important;
  color: #1b1b1b !important;
  font-size: 13px !important;
  font-weight: normal !important;
  text-decoration: none !important;
  text-align: left !important;
  transition: all 0.3s ease;
  position: relative;
  white-space: nowrap;
  background: none !important;
  border: none !important;
}

ul#mainnav li ul li a:hover {
  background-color: #f8f9fa !important;
  color: #9d0000 !important;
  padding-left: 26px !important;
}

ul#mainnav li ul li a::before {
  content: '›';
  position: absolute;
  left: 14px;
  opacity: 0;
  transition: all 0.3s ease;
  font-size: 16px;
  font-weight: bold;
}

ul#mainnav li ul li a:hover::before {
  opacity: 1;
}

/* ========================================
   サブドロップダウンメニュー（3階層目）
   ======================================== */
ul#mainnav li ul li ul {
  top: -8px !important;
  left: 100% !important;
  margin-left: -1px !important;
  transform: translateX(-10px);
  display: block !important;
  border-radius: 4px !important;
  padding: 8px 0 !important;
  position: absolute !important;
}

ul#mainnav li ul li:hover > ul {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

ul#mainnav li ul li ul li {
  width: 100% !important;
  height: 40px !important;
}

ul#mainnav li ul li ul li a {
  padding: 0 20px !important;
  height: 40px !important;
  line-height: 40px !important;
  font-size: 13px !important;
  white-space: nowrap;
  background: none !important;
  border: none !important;
}

ul#mainnav li ul li ul li a::before {
  content: '›';
  left: 14px;
  font-size: 16px;
}

ul#mainnav li ul li ul li a:hover {
  padding-left: 26px !important;
  background-color: #f8f9fa !important;
}