/* ===== 汉堡菜单按钮样式 ===== */
.hamburger-menu-btn {
  display: flex; /* PC端和移动端都显示 */
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
  position: relative;
  order: -1; /* 确保按钮在左侧 */
  flex-shrink: 0; /* 防止按钮被压缩 */
}

.hamburger-menu-btn span {
  width: 28px;
  height: 3px;
  background: white;
  border-radius: 3px;
  transition: all 0.3s ease;
  transform-origin: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hamburger-menu-btn:hover span {
  background: rgba(255, 255, 255, 0.9);
}

.hamburger-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* ===== 侧边栏菜单样式 ===== */
.sidebar-menu {
  position: fixed;
  top: 0;
  left: -300px; /* 默认隐藏在左侧 */
  width: 280px;
  height: 100vh;
  background: linear-gradient(180deg, rgba(74, 144, 226, 0.98) 0%, rgba(53, 122, 189, 0.98) 100%);
  backdrop-filter: blur(10px);
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
  z-index: 2000;
  transition: left 0.3s ease;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar-menu.open {
  left: 0;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.3);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0, 0, 0, 0.1);
}

.sidebar-header h3 {
  margin: 0;
  color: white;
  font-size: 24px;
  font-weight: 900;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.close-sidebar-btn {
  background: transparent;
  border: none;
  color: white;
  font-size: 32px;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.3s ease;
  line-height: 1;
}

.close-sidebar-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.sidebar-nav {
  padding: 20px 0;
  flex: 1;
  padding-bottom: 40px; /* 确保最后一个选项在移动端完全可见 */
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 20px;
  color: white;
  text-decoration: none;
  font-size: 18px;
  font-weight: 600;
  transition: all 0.3s ease;
  border-left: 4px solid transparent;
  margin: 4px 0;
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.15);
  border-left-color: white;
  transform: translateX(4px);
}

.sidebar-link:active {
  background: rgba(255, 255, 255, 0.25);
}

.sidebar-icon {
  font-size: 24px;
  width: 32px;
  text-align: center;
}

/* ===== 侧边栏遮罩 ===== */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  backdrop-filter: blur(2px);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
  .hamburger-menu-btn {
    display: flex !important;
    order: -1; /* 确保按钮在左侧 */
  }
  
  .game-nav-links {
    display: flex !important; /* 保持显示以容纳登录按钮 */
    gap: 8px;
  }
  
  /* 隐藏导航栏中的普通链接按钮，但保留登录按钮和用户菜单 */
  .game-nav .game-nav-links .game-btn:not(#login-btn) {
    display: none !important;
  }
  
  /* 注意：不要强制设置 #login-btn 和 #user-container 的 display 属性
     让 JavaScript (auth-ui.js) 根据登录状态动态控制显示/隐藏 */
  
  .sidebar-menu {
    width: 260px;
  }
  
  .sidebar-nav {
    padding-bottom: 50px; /* 移动端增加底部间距 */
  }
  
  /* 确保导航栏在移动端正确布局 */
  .game-nav {
    justify-content: flex-start !important;
    gap: 12px;
  }
  
  .game-logo {
    flex: 1;
    margin-left: 0;
    font-size: 20px; /* 移动端缩小字体 */
  }
}

/* PC端：确保布局正确 */
@media (min-width: 769px) {
  .game-nav {
    justify-content: space-between;
  }
  
  .game-logo {
    margin-right: auto; /* logo靠左 */
  }
  
  /* 确保登录按钮和用户菜单始终可见 */
  .game-nav-links {
    flex-shrink: 0;
    min-width: fit-content; /* 确保有足够空间 */
  }
  
  /* 确保登录按钮和用户菜单不被遮挡 */
  .game-nav-links .login-btn,
  .game-nav-links .user-container {
    flex-shrink: 0;
    margin-left: auto; /* 靠右对齐 */
  }
}

@media (max-width: 480px) {
  .sidebar-menu {
    width: 240px;
  }
  
  .sidebar-link {
    font-size: 16px;
    padding: 9px 18px;
  }
  
  .sidebar-icon {
    font-size: 20px;
    width: 28px;
  }
  
  .sidebar-nav {
    padding-bottom: 60px; /* 移动端增加更多底部间距 */
  }
}