/* 画布中的元素 */
.canvas-element {
    position: absolute;
    cursor: move;
    min-height: 20px;
    will-change: transform;
    transform: translateZ(0);
}

/* 文本元素 - 不允许调节高度 */
.canvas-element.text-element {
    resize: horizontal;
    min-width: 50px;
    height: auto !important;
    overflow: visible;
}

/* 元素内容区域 */
.element-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    user-select: none;
}

/* 文本元素内容 - 支持多行文本 */
.text-element .element-content {
    white-space: pre-wrap;
    overflow: visible;
    padding: 4px 8px;
    box-sizing: border-box;
    text-align: center;
}

/* 文本元素保持自然高度 */
.text-element {
    line-height: 1.4;
}

/* 元素变换指示器 */
.element-transform-info {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 11px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
}

.canvas-element.selected .element-transform-info {
    opacity: 1;
}

/* 键盘快捷键提示 */
.element-shortcut-hint {
    position: absolute;
    bottom: -25px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 10px;
    color: #6c757d;
    background: rgba(255, 255, 255, 0.9);
    padding: 2px;
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.2s;
}

.canvas-element:hover .element-shortcut-hint {
    opacity: 1;
}