* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: #f5f5f5;
    overflow: hidden;
    -webkit-user-select: none;
    user-select: none;
}

.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* 顶部工具栏 */
.toolbar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 10px 12px;
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
    flex-shrink: 0;
}

.btn {
    min-width: 68px;
    height: 36px;
    padding: 0 10px;
    font-size: 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fff;
    color: #333;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn:active {
    background: #f0f0f0;
}

.btn-primary {
    min-width: 100px;
    background: #4a90e2;
    color: #fff;
    border-color: #4a90e2;
}

.btn-primary:active {
    background: #3a7bc8;
}

/* 工具栏垂直分隔线 */
.toolbar-divider-v {
    width: 1px;
    height: 20px;
    background: #e0e0e0;
    margin: 0 2px;
}

/* 工具栏图标按钮 */
.toolbar-btn-icon {
    width: 28px;
    height: 28px;
    font-size: 14px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background: #fff;
    color: #555;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.toolbar-btn-icon:hover {
    background: #f5f5f5;
    border-color: #ccc;
}

.toolbar-btn-icon:active {
    background: #e8e8e8;
}

.toolbar-btn-icon:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background: #f5f5f5;
}

/* 撤销重做按钮组 */
.toolbar-action-group {
    display: flex;
    gap: 3px;
    margin: 0 2px;
}

/* 左侧分隔线（文本按钮后） */
.toolbar-divider-v.divider-left {
    margin-left: 4px;
    margin-right: 0;
}

/* 右侧分隔线（保存按钮前） */
.toolbar-divider-v.divider-right {
    margin-left: 0;
    margin-right: 4px;
}

/* 撤销重做按钮组 */
.toolbar-action-group {
    display: flex;
    gap: 3px;
    margin: 0;
}

/* 保存/预览按钮 */
.btn-primary {
    min-width: 80px;
    height: 36px;
    padding: 0 14px;
    font-size: 14px;
}

/* 文本输入框删除按钮 */
.text-input .text-delete-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 20px;
    height: 20px;
    background: #e74c3c;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 12px;
    line-height: 20px;
    text-align: center;
    cursor: pointer;
    display: none;
    z-index: 10;
}

.text-input.selected:not(.editing) .text-delete-btn {
    display: block;
}

/* 编辑器工具栏（文本/图片共用） */
.editor-toolbar {
    position: absolute;
    top: 65px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 8px 12px;
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
    flex-shrink: 0;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 100;
}

/* 编辑模式：粘在视口顶部始终可见 */
.editor-toolbar.editing-mode {
    position: fixed;
    top: 0;
    border-bottom: 1px solid #e0e0e0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 10000;
}

/* 移动端：允许横向滚动 */
@media (max-width: 768px) {
    .editor-toolbar {
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 8px;
    }
    .editor-toolbar::-webkit-scrollbar {
        display: none;
    }
    .toolbar-group {
        gap: 2px;
        flex-shrink: 0;
        width: 100%;
        justify-content: center;
    }
    .toolbar-btn {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    .toolbar-label {
        font-size: 12px;
    }
    .toolbar-label span:first-child {
        display: inline;
    }
    .roller-picker {
        min-width: 50px;
        height: 32px;
        padding: 2px 4px;
    }
}

.editor-toolbar.active {
    visibility: visible;
    opacity: 1;
}

.toolbar-group {
    display: none;
    justify-content: center;
    align-items: center;
    gap: 2px;
    width: 100%;
}

.toolbar-group.active {
    display: flex;
}

.toolbar-btn {
    width: 36px;
    height: 36px;
    font-size: 16px;
    font-weight: bold;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fff;
    color: #333;
    cursor: pointer;
    transition: all 0.2s;
}

.toolbar-btn:active {
    background: #f0f0f0;
}

.toolbar-btn.active {
    background: #4a90e2;
    color: #fff;
    border-color: #4a90e2;
}

.toolbar-btn.italic {
    font-style: italic;
}

/* 镜像按钮样式 */
.toolbar-btn.mirror-btn {
    width: 30px;
    height: 30px;
    font-size: 16px;
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: #ddd;
    margin: 0 1px;
}

.toolbar-label {
    display: flex;
    align-items: center;
    gap: 2px;
    font-size: 12px;
    color: #666;
}

.toolbar-label select {
    padding: 4px 6px;
    font-size: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: #fff;
    cursor: pointer;
}

.opacity-slider {
    width: 100px;
    height: 32px;
    cursor: pointer;
    accent-color: #4a90e2;
    margin: 0;
}

.scale-slider {
    width: 100px;
    height: 32px;
    cursor: pointer;
    accent-color: #4a90e2;
    margin: 0;
}

.rotate-slider {
    width: 100px;
    height: 32px;
    cursor: pointer;
    accent-color: #4a90e2;
    margin: 0;
}

/* 旋转度数显示固定宽度 */
#rotateValue {
    display: inline-block;
    min-width: 40px;
    text-align: center;
}

/* 百分比显示固定宽度 */
#opacityValue, #bgScaleValue, #bgOpacityValue {
    display: inline-block;
    min-width: 40px;
    text-align: center;
}

/* 字号滚轮选择器 */
.roller-picker {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    min-width: 65px;
    height: 36px;
}

.roller-arrow {
    font-size: 10px;
    color: #666;
    cursor: pointer;
    padding: 2px 4px;
    user-select: none;
    transition: color 0.2s;
}

.roller-arrow:hover {
    color: #4a90e2;
}

.roller-value {
    font-size: 14px;
    min-width: 24px;
    text-align: center;
    color: #333;
}

#fontPicker {
    min-width: 55px;
}

.toolbar-label input[type="color"] {
    width: 36px;
    height: 36px;
    padding: 2px;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
}

/* 图片展示区 */
.canvas-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    overflow: auto;
    position: relative;
}

/* 空提示 - 移到预览白板中 */
.empty-tip {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #999;
    font-size: 14px;
    text-align: center;
    pointer-events: none;
    z-index: 5;
}

/* 预览区域固定 3:5 比例，打开即显示空白面板 */
.preview {
    overflow: hidden;
}

.image-container {
    display: flex;
    position: relative;
    width: 100%;
    max-width: 360px;
    aspect-ratio: 960 / 1361;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    background: #fff;
    overflow: hidden;
    touch-action: pan-x;
    margin: 0 auto;
    contain: layout style paint;
}

.image-container.empty {
    background: #f0f0f0;
    border: 2px dashed #ddd;
}

/* 背景图层 - 用于滑动调整位置，溢出隐藏 */
.preview-bg-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

/* 层叠图层 - 位于背景图之上、文字之下、提示文字之上 */
.overlay-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 6;
}

.overlay-layer .overlay-image {
    position: absolute;
    pointer-events: auto;
    cursor: move;
    touch-action: none;
}

.overlay-layer .overlay-image.selected {
    outline: 2px dashed rgba(74, 144, 226, 0.8);
    outline-offset: 2px;
}

.overlay-layer .overlay-image .resize-handle {
    display: none;
}

.overlay-layer .overlay-image.selected .resize-handle {
    display: block;
}

.overlay-layer .overlay-image .delete-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 20px;
    height: 20px;
    background: #e74c3c;
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 12px;
    line-height: 20px;
    text-align: center;
    cursor: pointer;
    display: none;
    z-index: 10;
}

.overlay-layer .overlay-image.selected .delete-btn {
    display: block;
}

/* 输入框图层 - 与背景图层隔离 */
.preview-input-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 7;
}

/* 输入框可交互 */
.preview-input-layer .text-input {
    pointer-events: auto;
    z-index: 8;
}

/* 背景图 - 保持比例，可滑动调整位置 */
#bgImage {
    display: block;
    position: absolute;
    max-width: none;
    -webkit-user-drag: none;
}

#bgImage[src=""] {
    display: none;
}

/* 文字输入框 - 透明无边框设计，黑色微软雅黑16px */
.text-input {
    position: absolute;
    min-width: 80px;
    min-height: 32px;
    padding: 0;
    font-size: 16px;
    color: #000;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    background: transparent;
    outline: 2px solid transparent;
    border-radius: 4px;
    cursor: grab;
    white-space: nowrap;
    line-height: 1.4;
    -webkit-user-select: none;
    user-select: none;
    transition: outline-color 0.2s;
    z-index: 10;
    overflow: visible;
    max-width: none;
    box-sizing: border-box;
    font-weight: bold;
}

/* 选中状态（单击/长按） - 仅显示虚线轮廓 */
.text-input.selected {
    outline: 2px dashed rgba(74, 144, 226, 0.6);
    cursor: grab;
}

/* 锁定状态 */
.text-input.locked {
    cursor: default !important;
}

.text-input.locked.selected {
    outline: 2px dashed rgba(255, 193, 7, 0.8);
}

.text-input.locked .text-delete-btn {
    display: none !important;
}

/* 空输入框显示 placeholder */
.text-input.show-placeholder::before {
    content: attr(data-placeholder);
    color: #999;
    pointer-events: none;
}

/* 编辑状态（双击） - 显示实线轮廓 */
.text-input.editing {
    outline: 2px solid #4a90e2;
    background: rgba(255,255,255,0.1);
    cursor: text;
    -webkit-user-select: text;
    user-select: text;
    -webkit-touch-callout: default;
    pointer-events: auto;
}

/* 拖拽状态 */
.text-input.dragging {
    opacity: 0.8;
    cursor: grabbing;
}

/* 隐藏元素 */
.hidden {
    display: none !important;
}

/* 隐藏空提示 */
.empty-tip.hidden {
    display: none;
}

/* 右键菜单 */
.context-menu {
    position: fixed;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    padding: 4px 0;
    z-index: 1000;
    min-width: 140px;
}

.context-menu-item {
    padding: 10px 16px;
    font-size: 14px;
    color: #333;
    cursor: pointer;
    transition: background 0.2s;
}

.context-menu-item:hover {
    background: #f5f5f5;
}

.context-menu-item:active {
    background: #e8e8e8;
}

/* 拖拽辅助线 */
.guide-line {
    position: absolute;
    pointer-events: none;
    z-index: 1000;
    display: none;
}

.guide-horizontal {
    left: 0;
    right: 0;
    height: 1px;
    background: #e74c3c;
    box-shadow: 0 0 4px rgba(231, 76, 60, 0.5);
}

.guide-vertical {
    top: 0;
    bottom: 0;
    width: 1px;
    background: #e74c3c;
    box-shadow: 0 0 4px rgba(231, 76, 60, 0.5);
}

.guide-line.visible {
    display: block;
}

/* 1px 网格线 */
.grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 5;
    display: none;
    background-image: 
        linear-gradient(to right, rgba(0, 0, 0, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
    background-size: 10px 10px;
}

.grid-lines.visible {
    display: block;
}

/* ==================== 图层面板样式 ==================== */
.layers-panel {
    position: fixed;
    top: 60px;
    right: -280px;
    width: 260px;
    height: calc(100vh - 80px);
    background: #fff;
    border-left: 1px solid #e0e0e0;
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    z-index: 200;
    display: flex;
    flex-direction: column;
    transition: right 0.3s ease;
}

.layers-panel.active {
    right: 0;
}

.layers-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid #e0e0e0;
    background: #f8f8f8;
}

.layers-title {
    font-size: 14px;
    font-weight: 600;
    color: #333;
}

.layers-close {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    font-size: 18px;
    color: #666;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.layers-close:hover {
    background: #e0e0e0;
    color: #333;
}

.layers-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.layer-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    margin-bottom: 4px;
    background: #f5f5f5;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.layer-item:hover {
    background: #e8e8e8;
}

.layer-item.selected {
    background: #e3f2fd;
    border-color: #4a90e2;
}

.layer-item.hidden {
    opacity: 0.5;
    display: flex !important;
}

.layer-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    font-size: 14px;
}

.layer-info {
    flex: 1;
    min-width: 0;
}

.layer-name {
    font-size: 13px;
    color: #333;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.layer-type {
    font-size: 11px;
    color: #999;
    margin-top: 2px;
}

.layer-visibility {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s;
    background: #4CAF50;
    color: white;
    border: 2px solid transparent;
}

.layer-visibility.is-hidden {
    background: #f44336;
    color: white;
}

.layer-visibility:hover {
    opacity: 0.8;
    transform: scale(1.1);
}

.layer-visibility:active {
    transform: scale(0.95);
}

.layers-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 12px;
    border-top: 1px solid #e0e0e0;
    background: #f8f8f8;
    flex-wrap: wrap;
}

.layers-btn {
    width: 32px;
    height: 32px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.layers-btn:hover {
    background: #f0f0f0;
    border-color: #ccc;
}

.layers-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.layers-btn-danger:hover {
    background: #ffebee;
    border-color: #ef5350;
}

.layers-divider {
    width: 1px;
    height: 24px;
    background: #ddd;
    margin: 0 4px;
}

/* 图层隐藏状态（用于画布上的元素） */
.layer-hidden {
    visibility: hidden !important;
    pointer-events: none !important;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .layers-panel {
        width: 240px;
        right: -260px;
        top: 50px;
        height: calc(100vh - 50px);
    }
    
    .layers-actions {
        padding: 8px;
    }
    
    .layers-btn {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
}