/* ----------- Alert 弹窗遮罩 ----------- */
#alert-overlay {
  position: fixed;
  inset: 0;
  z-index: 5000;

  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
}

/* 用 hidden 控制显示/隐藏 */
#alert-overlay.hidden {
  display: none;
}

/* ----------- 弹窗主体：直接居中定位 ----------- */
#alert-dialog {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  width: 360px;
  padding: 24px 28px;
  border-radius: 16px;

  background: rgba(0,0,0,0.8);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.45);

  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* 标题 */
#alert-title {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

/* 内容 */
#alert-message {
  font-size: 14px;
  color: #eee;
  opacity: 0.9;
  line-height: 1.6em;
}

/* 按钮区域 */
#alert-actions {
  display: flex;
  justify-content: flex-end;
}

/* 主按钮 */
.btn-primary {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;

  background: #3ecf5a;
  color: white;
  transition: 0.15s ease-out;
}

.btn-primary:hover {
  background: #4be66d;
  transform: translateY(-2px);
}