/* ============================================
   Theme Toggle Button - 主题切换按钮
   ============================================ */

.theme-toggle {
  background: none;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  transition: all 0.3s ease;
  font-size: 1.2rem;
}

.theme-toggle:hover {
  color: var(--link-color);
  transform: rotate(15deg);
}

/* ============================================
   Tooltip Component - 提示框组件
   ============================================ */

.tooltip-container {
  position: relative;
  display: inline-block;
}

.tooltip-box {
  position: fixed;
  padding: 6px 12px;
  background-color: var(--tooltip-bg);
  color: var(--tooltip-text);
  font-size: 0.75rem;
  white-space: nowrap;
  border-radius: 6px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  pointer-events: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  z-index: 1000;
}

.tooltip-box.tooltip-top {
  transform: translate(-50%, -100%);
  margin-top: -8px;
}

.tooltip-box.tooltip-bottom {
  transform: translate(-50%, 0);
  margin-top: 8px;
}

.tooltip-box.tooltip-left {
  transform: translate(-100%, -50%);
  margin-right: 8px;
}

.tooltip-box.tooltip-right {
  transform: translate(0, -50%);
  margin-left: 8px;
}

.tooltip-box.show {
  opacity: 1;
  visibility: visible;
}