/* ==========================================
   统一工具页面样式 - 固定返回按钮
   ========================================== */

.tool-header-actions {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 9999;
  display: flex;
  gap: var(--spacing-sm);
}

.btn-back {
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  text-decoration: none;
}

.btn-back:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-back:active {
  transform: translateY(0);
}

/* 确保页面内容不被按钮遮挡 */
.tool-container {
  padding-top: 20px;
}

@media (max-width: 768px) {
  .tool-header-actions {
    top: 10px;
    left: 10px;
  }
  
  .btn-back {
    padding: 8px 16px;
    font-size: 0.9rem;
  }
}