* {
    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;
    gap: 16px;
    padding: 12px 16px;
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
    flex-shrink: 0;
}

.btn {
    padding: 10px 24px;
    font-size: 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fff;
    color: #333;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:active {
    background: #f0f0f0;
}

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

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

/* 文本编辑器工具栏 */
.text-editor-toolbar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: #fff;
    border-bottom: 1px solid #e0e0e0;
    flex-shrink: 0;
}

.toolbar-btn {
    width: 40px;
    height: 40px;
    font-size: 18px;
    font-weight: bold;
    border: 1px solid #ddd;
    border-radius: 8px;
    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;
}

.toolbar-divider {
    width: 1px;
    height: 28px;
    background: #ddd;
    margin: 0 4px;
}

.toolbar-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #666;
}

.toolbar-label select {
    padding: 6px 8px;
    font-size: 13px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
}

/* 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: 3 / 5;
    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 */
.overlay-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.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;
}

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

/* 背景图 - 保持比例，可滑动调整位置 */
#bgImage {
    display: block;
    position: absolute;
    height: 100%;
    width: auto;
    max-width: none;
    left: 50%;
    transform: translateX(-50%);
    -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: 4px 8px;
    font-size: 16px;
    color: #000;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 4px;
    outline: none;
    cursor: grab;
    white-space: nowrap;
    line-height: 1.4;
    -webkit-user-select: none;
    user-select: none;
    transition: border-color 0.2s;
    z-index: 10;
    /* 确保输入框内容超出时不影响父容器和其他元素 */
    overflow: visible;
    max-width: none;
    box-sizing: border-box;
}

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

/* 编辑状态（双击） - 显示实线边框 */
.text-input.editing {
    border: 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;
}

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

/* 长按提示 */
.long-press-tip {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 16px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    font-size: 12px;
    border-radius: 16px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 1000;
}

.long-press-tip.show {
    opacity: 1;
}

/* 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;
}