/* ==========================================================================
   顶部导航「Lua在线运行」高亮特效
   渐变胶囊 + 流光扫过 + HOT 徽标 + 烧瓶图标摇摆
   ========================================================================== */

#nav .menus_items > .menus_item > a.lua-nav-effect {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0;
  margin-left: 2px;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: 999px;
  background-image: linear-gradient(115deg, #ff5f6d 0%, #c44dff 48%, #4d9fff 100%);
  background-size: 220% 220%;
  color: #fff !important;
  line-height: 1;
  text-shadow: 0 1px 3px rgba(0, 0, 0, .28);
  box-shadow: 0 3px 14px rgba(196, 77, 255, .38), 0 0 0 1px rgba(255, 255, 255, .12) inset;
  vertical-align: middle;
  transition: transform .25s ease, box-shadow .25s ease, filter .25s ease;
  animation: lua-nav-gradient 6s ease-in-out infinite;
  will-change: background-position;
}

/* 去掉主题默认的下划线，避免和胶囊按钮冲突 */
#nav .menus_items > .menus_item > a.lua-nav-effect:not(.child)::after {
  display: none;
}

#nav .menus_items > .menus_item > a.lua-nav-effect:hover {
  transform: translateY(-1px) scale(1.05);
  color: #fff !important;
  filter: brightness(1.08) saturate(1.12);
  box-shadow: 0 6px 22px rgba(196, 77, 255, .6), 0 0 0 1px rgba(255, 255, 255, .3) inset;
}

#nav .menus_items > .menus_item > a.lua-nav-effect:active {
  transform: translateY(0) scale(.98);
}

.lua-nav-effect .lua-nav-effect-inner {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 13px 6px 11px;
  border-radius: 999px;
  overflow: hidden;
}

/* 流光扫过 */
.lua-nav-effect .lua-nav-effect-inner::before {
  position: absolute;
  top: -40%;
  bottom: -40%;
  left: -80%;
  width: 45%;
  background: linear-gradient(100deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, .85) 50%,
    rgba(255, 255, 255, 0) 100%);
  transform: skewX(-20deg);
  content: '';
  pointer-events: none;
  animation: lua-nav-shine 4.8s ease-in-out infinite;
}

.lua-nav-effect .lua-nav-effect-inner > i {
  position: relative;
  z-index: 1;
  transform-origin: 50% 85%;
  animation: lua-nav-flask 3.6s ease-in-out infinite;
}

.lua-nav-effect .lua-nav-effect-inner > span {
  position: relative;
  z-index: 1;
}

/* HOT 徽标 */
.lua-nav-effect .lua-nav-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  z-index: 2;
  padding: 1px 5px;
  border-radius: 999px;
  background: linear-gradient(120deg, #ffb347, #ff4d6d);
  color: #fff;
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .6px;
  line-height: 1.5;
  text-shadow: none;
  box-shadow: 0 2px 8px rgba(255, 77, 109, .55);
  pointer-events: none;
  animation: lua-nav-badge 1.9s ease-in-out infinite;
}

@keyframes lua-nav-gradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes lua-nav-shine {
  0%, 58% { left: -80%; opacity: 0; }
  64% { opacity: 1; }
  88% { left: 130%; opacity: 1; }
  100% { left: 130%; opacity: 0; }
}

@keyframes lua-nav-flask {
  0%, 78%, 100% { transform: rotate(0deg) scale(1); }
  82% { transform: rotate(-12deg) scale(1.12); }
  86% { transform: rotate(10deg) scale(1.12); }
  90% { transform: rotate(-6deg) scale(1.06); }
  94% { transform: rotate(0deg) scale(1); }
}

@keyframes lua-nav-badge {
  0%, 100% { transform: scale(1); box-shadow: 0 2px 8px rgba(255, 77, 109, .5); }
  50% { transform: scale(1.12); box-shadow: 0 2px 14px rgba(255, 77, 109, .85); }
}

/* 窄屏时压缩内边距、隐藏徽标，避免导航拥挤 */
@media screen and (max-width: 1100px) {
  #nav .menus_items > .menus_item > a.lua-nav-effect .lua-nav-effect-inner {
    padding: 5px 9px;
    gap: 4px;
  }

  .lua-nav-effect .lua-nav-badge {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  #nav .menus_items > .menus_item > a.lua-nav-effect,
  .lua-nav-effect .lua-nav-effect-inner::before,
  .lua-nav-effect .lua-nav-effect-inner > i,
  .lua-nav-effect .lua-nav-badge {
    animation: none !important;
  }
}