/**
 * css/lang.css — 语言切换模块样式
 * 独立于 layout.css，便于多语言页面复用
 */

/* ========== 语言切换按钮 ========== */
.lang-btn {
  font-family: var(--font-body);
  font-size: 13px;
  color: #888;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  position: relative;
  user-select: none;
  transition: color 0.2s;
}
.lang-btn:hover {
  color: var(--color-primary);
}
.lang-btn svg {
  flex: none;
  transition: transform 0.2s;
}
.lang-btn.open svg {
  transform: rotate(180deg);
}

/* ========== 语言下拉面板 ========== */
.lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  min-width: 120px;
  padding: 6px 0;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
}
.lang-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

/* ========== 语言选项 ========== */
.lang-dropdown a {
  display: block;
  padding: 8px 18px;
  font-family: var(--font-body);
  font-size: 13px;
  color: #555;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.lang-dropdown a:hover {
  background: var(--color-gray-light, #f5f5f5);
  color: var(--color-black, #222);
}

/* 当前选中语言高亮 */
.lang-dropdown a.lang-active {
  color: var(--color-primary);
  font-weight: 600;
  background: rgba(0, 91, 187, 0.06);
}