/* web/css/story-book.css */

/* 绘本主容器：增加纸张质感 */
.card.shadow {
    border: none;
    border-radius: 20px;
    overflow: hidden;
    background-color: #f9f9f9;
}

/* Canvas 容器：锁定 4:3 或 16:9 比例，防止变形 */
.canvas-wrapper {
    position: relative;
    width: 100%;
    /* 模拟纸张纹理 */
    background-image: url('https://www.transparenttextures.com/patterns/paper-fibers.png');
    background-color: #fff;
    cursor: pointer;
}

#bookCanvas {
    display: block;
    width: 100%;
    height: auto;
    /* 平滑渲染：适合像素艺术或矢量图形 */
    image-rendering: auto; 
}

/* 底部文案悬浮层：带有磨砂玻璃效果 */
#storyTextOverlay {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(5px);
    color: #333;
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.6;
    border-top: 1px solid rgba(0,0,0,0.05);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

/* 按钮美化 */
.card-footer {
    border-top: 1px solid #eee;
    padding: 1.5rem;
}

.btn-primary {
    background-color: #6c5ce7;
    border-color: #6c5ce7;
    border-radius: 50px;
    padding: 10px 25px;
    font-weight: 600;
    transition: transform 0.2s;
}

.btn-primary:hover {
    background-color: #5849be;
    transform: translateY(-2px);
}

.btn-outline-secondary {
    border-radius: 50px;
    padding: 10px 25px;
}

/* 页面指示器 */
#pageIndicator {
    font-family: 'Courier New', Courier, monospace;
    letter-spacing: 2px;
    font-weight: bold;
}

/* 适配移动端：小屏幕下缩小文字 */
@media (max-width: 768px) {
    #storyTextOverlay {
        font-size: 1rem;
        padding: 15px !important;
    }
}