/* navigation.css */
.main-navigation {
  background: #222;
  color: #fff;
  padding: 0;
  margin-bottom: 24px;
  font-family: 'Segoe UI', Arial, sans-serif;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  position: relative;
}

.main-navigation .menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
}

/* 下拉選單樣式 */
.main-navigation .dropdown {
  position: relative;
}
.main-navigation .dropdown-toggle {
  cursor: pointer;
  padding-right: 26px;
}
.main-navigation .arrow {
  margin-left: 4px;
  font-size: 0.8em;
}
.main-navigation .dropdown-menu {
  display: none;
  position: absolute;
  left: 0;
  top: 100%;
  background: #222;
  min-width: 180px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.13);
  z-index: 100;
  border-radius: 0 0 8px 8px;
  padding: 0;
}
.main-navigation .dropdown-menu li {
  width: 100%;
}
.main-navigation .dropdown:hover > .dropdown-menu,
.main-navigation .dropdown:focus-within > .dropdown-menu {
  display: block;
  animation: fadeIn 0.18s;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 下拉選單項目 hover */
.main-navigation .dropdown-menu a:hover {
  background: #333;
  color: #ffeb3b;
}

.main-navigation li {
  margin: 0;
  padding: 0;
  position: relative;
}

.main-navigation a {
  display: block;
  color: #fff;
  text-decoration: none;
  padding: 16px 20px;
  transition: all 0.3s ease;
}

.main-navigation a:hover, 
.main-navigation a:focus {
  background: #444;
  color: #ffd700;
}

/* 手機選單按鈕 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 15px;
  cursor: pointer;
  position: absolute;
  right: 10px;
  top: 5px;
  z-index: 1000;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: #309bff;
  margin: 5px 0;
  transition: all 0.3s ease;
}

/* 手機樣式 */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .main-navigation .menu {
    display: none;
    width: 100%;
    background: #333;
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 999;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  }
  
  .main-navigation .menu.active {
    display: block;
  }
  
  .main-navigation .menu li {
    width: 100%;
    text-align: center;
    border-bottom: 1px solid #444;
  }
  
  .main-navigation .menu a {
    padding: 15px 20px;
  }
  
  /* 漢堡選單動畫 */
  .menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}