@preview-page-list-height: 70vh;

.isekai-preview-page-list-card {
    height: @preview-page-list-height;
}

.isekai-preview-page-list-card > .card-header {
    height: 2.2rem;
}

.isekai-preview-page-list-container {
    height: 100%;
    margin: 0;

    .fallback-page-list {
        padding: 12px 20px;
        height: @preview-page-list-height;
        overflow-y: auto;
    }

    .loading {
        width: 100%;
        height: 99.5%;
        height: calc(100% - 2px); // fix: overflow because of border
        margin-top: 1px;
        display: flex;

        .spinner {
            margin: auto;
            padding: 2rem;
            width: 100%;
            display: flex;
            justify-content: center;
            
            .oo-ui-progressBarWidget {
                width: 100%;
            }
        }
    }

    .isekai-booklet-layout {
        display: flex;
        height: @preview-page-list-height;
    }

    // 页面列表
    .isekai-booklet-menu {
        flex: 0 0;
        width: 280px;
        flex-basis: 280px;
        padding-bottom: 0 !important;
        height: @preview-page-list-height;
        overflow-y: auto;
        border-right: 1px solid rgba(0,0,0,.12);
    }

    .isekai-preview-page-list {
        width: 100%;

        .isekai-list-item {
            &.active {
                box-shadow: none;
                background-color: #36c;
                color: #fff !important;
            }
        }
    }

    // 页面预览
    .isekai-booklet-content {
        flex: 1 1;
        width: 0;
        height: @preview-page-list-height;
        display: flex;
        flex-direction: column;

        .card-header {
            flex: 0 0;
            border-top-left-radius: 0;
        }

        .back-button-container {
            display: none;
        }

        .isekai-preview-container {
            box-sizing: border-box;
            width: 100%;
            flex: 1 1;
            overflow-y: auto;
            padding: 12px 20px;
        }

        // 提示选择页面
        .isekai-preview-page-list-placeholder {
            width: 100%;
            height: @preview-page-list-height;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.2rem;
        }
    }

    @media (max-width: 576px) {
        .isekai-booklet-layout {
            position: relative;

            &.animating {
                .isekai-booklet-menu,
                .isekai-booklet-content {
                    transition: transform 150ms ease-in-out, opacity 150ms ease-in-out;
                    position: absolute;
                    top: 0;
                    left: 0;
                    width: 100%;
                }

                .isekai-booklet-menu {
                    display: block;
                    z-index: 3;
                    background: white;
                }

                .isekai-booklet-content {
                    display: flex;
                    z-index: 2;
                }

                &.focus-menu-transition {
                    .isekai-booklet-menu {
                        transform: scale(100%);
                        opacity: 1;
                    }

                    .isekai-booklet-content {
                        transform: scale(80%);
                        opacity: 0;
                    }
                }

                &.focus-content-transition {
                    .isekai-booklet-menu {
                        transform: scale(120%);
                        opacity: 0;
                    }

                    .isekai-booklet-content {
                        transform: scale(100%);
                        opacity: 1;
                    }
                }
            }

            .isekai-booklet-menu {
                width: 100%;
                flex-basis: 100%;
                border-right: none;
            }

            .isekai-booklet-content {
                display: none;
            }

            &.focus-content {
                .isekai-booklet-menu {
                    display: none;
                }

                .isekai-booklet-content {
                    display: flex;
                }
            }

            .back-button-container {
                display: flex;
            }
        }
    }
}