@model TimelineViewModel
@{
    ViewData["Title"] = "Timeline";
    ViewData["ShellClass"] = "plotline-shell-wide";
    var selectedBook = Model.Books.FirstOrDefault(x => x.Book.BookID == Model.SelectedBookID)?.Book;
    var timelineMetricScenes = Model.Books
        .SelectMany(book => book.Chapters.SelectMany(chapter => chapter.Scenes.Select(scene => new
        {
            sceneId = scene.SceneID,
            axisLabel = $"{chapter.Chapter.ChapterNumber:g}.{scene.SceneNumber:g}",
            chapterLabel = $"Chapter {chapter.Chapter.ChapterNumber:g}",
            sceneNumber = scene.SceneNumber.ToString("g"),
            sceneTitle = scene.SceneTitle,
            bookTitle = book.Book.BookTitle,
            timelineUrl = Url.Action("Index", "Timeline", new { projectId = Model.Project.ProjectID, bookId = book.Book.BookID, selectedSceneId = scene.SceneID })
        })))
        .ToList();
    var timelineMetricShapePayload = new
    {
        scenes = timelineMetricScenes,
        metrics = Model.MetricGraphs.Select(graph => new
        {
            metricName = graph.MetricName,
            points = graph.Points.Select(point => new { sceneId = point.SceneID, value = point.Value })
        })
    };
    var hasActiveFilter = Model.MatchingSceneIDs.Count != Model.OrderedScenes.Count || !string.IsNullOrWhiteSpace(Model.FocusLabel);
    var warningScenes = Model.OrderedScenes.Where(x => x.WarningCount > 0).ToList();
    var timelineColumns = new List<(BookTimelineViewModel Book, ChapterTimelineViewModel? Chapter, Scene? Scene, bool IsPlaceholder, string PlaceholderLabel)>();
    foreach (var book in Model.Books)
    {
        if (!book.Chapters.Any())
        {
            timelineColumns.Add((book, null, null, true, "No chapters"));
            continue;
        }

        foreach (var chapter in book.Chapters)
        {
            if (!chapter.Scenes.Any())
            {
                timelineColumns.Add((book, chapter, null, true, "No scenes"));
                continue;
            }

            foreach (var scene in chapter.Scenes)
            {
                timelineColumns.Add((book, chapter, scene, false, string.Empty));
            }
        }
    }
    int ChapterSceneColumns(ChapterTimelineViewModel chapter) => Math.Max(chapter.Scenes.Count, 1);
    int BookSceneColumns(BookTimelineViewModel book) => Math.Max(book.Chapters.Any() ? book.Chapters.Sum(ChapterSceneColumns) : 1, 1);
}

<section class="context-header">
    <div class="context-title">
        <span class="eyebrow">Workspace context</span>
        <strong>@Model.Project.ProjectName@if (selectedBook is not null) { <span> / @selectedBook.BookTitle</span> }</strong>
    </div>
    <nav class="context-nav" aria-label="Workspace navigation">
        <a asp-controller="Projects" asp-action="Details" asp-route-id="@Model.Project.ProjectID">Project</a>
        <a asp-controller="Timeline" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Timeline</a>
        <a asp-controller="Scenarios" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID">Scenarios</a>
        <a asp-controller="Analytics" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Story health</a>
        <a asp-controller="Warnings" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Warnings</a>
        <a asp-controller="Characters" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID">Characters</a>
        <a asp-controller="StoryAssets" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID">Assets</a>
        <a asp-controller="Locations" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID">Locations</a>
        <a asp-controller="PlotThreads" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID">Threads</a>
        <a asp-controller="Archives" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID">Archived Items</a>
    </nav>
</section>

<div class="workspace-heading">
    <div>
        <p class="eyebrow">Story timeline</p>
        <h1>@Model.Project.ProjectName</h1>
    </div>
    <form method="get" class="timeline-filter">
        <input type="hidden" name="ProjectID" value="@Model.Project.ProjectID" />
        <select name="BookID" asp-items="Model.BookOptions" class="form-select">
            <option value="">All books</option>
        </select>
        <button class="btn btn-outline-primary" type="submit">View</button>
    </form>
    <div class="button-row">
        <form asp-controller="Warnings" asp-action="ValidateProject" method="post">
            <input type="hidden" name="projectId" value="@Model.Project.ProjectID" />
            <input type="hidden" name="bookId" value="@Model.SelectedBookID" />
            <button class="btn btn-outline-primary" type="submit">Validate project</button>
        </form>
        @if (Model.SelectedBookID.HasValue)
        {
            <form asp-controller="Warnings" asp-action="ValidateBook" method="post">
                <input type="hidden" name="projectId" value="@Model.Project.ProjectID" />
                <input type="hidden" name="bookId" value="@Model.SelectedBookID" />
                <button class="btn btn-outline-primary" type="submit">Validate book</button>
            </form>
        }
        <a class="btn btn-outline-secondary" asp-controller="Warnings" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Warnings</a>
        <a class="btn btn-outline-secondary" asp-controller="Analytics" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Story health</a>
        <a class="btn btn-outline-primary" asp-controller="Scenarios" asp-action="Create" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Create Scenario</a>
        <a class="btn btn-outline-secondary" asp-controller="Archives" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID">Archived Items</a>
    </div>
</div>

<section class="timeline-control-panel" data-timeline-controls>
    <details class="timeline-filter-drawer" @(hasActiveFilter ? "open" : "")>
        <summary>Filters and focus</summary>
        <form method="get" class="timeline-filter-grid">
            <input type="hidden" name="ProjectID" value="@Model.Project.ProjectID" />
            <div>
                <label class="form-label">Book</label>
                <select name="BookID" asp-items="Model.BookOptions" class="form-select form-select-sm">
                    <option value="">All books</option>
                </select>
            </div>
            <div>
                <label class="form-label">From chapter</label>
                <select name="ChapterFromID" asp-items="Model.ChapterFromOptions" class="form-select form-select-sm">
                    <option value="">Start</option>
                </select>
            </div>
            <div>
                <label class="form-label">To chapter</label>
                <select name="ChapterToID" asp-items="Model.ChapterToOptions" class="form-select form-select-sm">
                    <option value="">End</option>
                </select>
            </div>
            <div>
                <label class="form-label">From scene</label>
                <select name="SceneFromID" asp-items="Model.SceneFromOptions" class="form-select form-select-sm">
                    <option value="">Start</option>
                </select>
            </div>
            <div>
                <label class="form-label">To scene</label>
                <select name="SceneToID" asp-items="Model.SceneToOptions" class="form-select form-select-sm">
                    <option value="">End</option>
                </select>
            </div>
            <div>
                <label class="form-label">Plot line</label>
                <select name="PlotLineID" asp-items="Model.PlotLineOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Plot thread</label>
                <select name="PlotThreadID" asp-items="Model.PlotThreadOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Story asset</label>
                <select name="StoryAssetID" asp-items="Model.AssetOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Character</label>
                <select name="CharacterID" asp-items="Model.CharacterOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Location</label>
                <select name="LocationID" asp-items="Model.LocationOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Warning severity</label>
                <select name="WarningSeverityID" asp-items="Model.WarningSeverityOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Warning type</label>
                <select name="WarningTypeID" asp-items="Model.WarningTypeOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Revision status</label>
                <select name="RevisionStatusID" asp-items="Model.RevisionStatusOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Scene purpose</label>
                <select name="ScenePurposeTypeID" asp-items="Model.ScenePurposeOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">POV character</label>
                <select name="POVCharacterID" asp-items="Model.PovCharacterOptions" class="form-select form-select-sm"><option value="">Any</option></select>
            </div>
            <div>
                <label class="form-label">Focus type</label>
                <select name="FocusType" class="form-select form-select-sm">
                    <option value="">No focus</option>
                    <option value="character" selected="@(Model.Filter.FocusType == "character")">Character</option>
                    <option value="asset" selected="@(Model.Filter.FocusType == "asset")">Story asset</option>
                    <option value="plotline" selected="@(Model.Filter.FocusType == "plotline")">Plot line</option>
                    <option value="plotthread" selected="@(Model.Filter.FocusType == "plotthread")">Plot thread</option>
                    <option value="location" selected="@(Model.Filter.FocusType == "location")">Location</option>
                    <option value="scene" selected="@(Model.Filter.FocusType == "scene")">Scene</option>
                </select>
            </div>
            <div>
                <label class="form-label">Focus ID</label>
                <input name="FocusID" value="@Model.Filter.FocusID" class="form-control form-control-sm" placeholder="Entity ID" />
            </div>
            <div class="timeline-filter-checks">
                <label><input type="checkbox" name="ShowWarningsOnly" value="true" checked="@Model.Filter.ShowWarningsOnly" /> Warnings only</label>
                <label><input type="checkbox" name="IncludeDismissedWarnings" value="true" checked="@Model.Filter.IncludeDismissedWarnings" /> Include dismissed</label>
                <label><input type="checkbox" name="IncludeIntentionalWarnings" value="true" checked="@Model.Filter.IncludeIntentionalWarnings" /> Include intentional</label>
            </div>
            <div class="timeline-filter-actions">
                <button class="btn btn-outline-primary btn-sm" type="submit">Apply filters</button>
                <a class="btn btn-outline-secondary btn-sm" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Clear filters</a>
            </div>
        </form>
    </details>

    <details class="timeline-control-group">
        <summary>View</summary>
        <div class="timeline-visibility-panel">
        <label class="timeline-control-select">Density
            <select class="form-select form-select-sm" data-timeline-density>
                <option value="compact">Compact</option>
                <option value="comfortable">Comfortable</option>
                <option value="expanded">Expanded</option>
            </select>
        </label>
        <label class="timeline-control-select">Zoom
            <select class="form-select form-select-sm" data-timeline-zoom>
                <option value="book">Book</option>
                <option value="chapter">Chapter</option>
                <option value="scene-detail">Scene Detail</option>
            </select>
        </label>
        <label><input type="checkbox" data-timeline-toggle="scene-cards" checked /> Scene cards</label>
        <label><input type="checkbox" data-timeline-toggle="plot-lines" checked /> Plot lines</label>
        <label><input type="checkbox" data-timeline-toggle="assets" checked /> Story assets</label>
        <label><input type="checkbox" data-timeline-toggle="characters" checked /> Characters</label>
        <label><input type="checkbox" data-timeline-toggle="locations" checked /> Locations</label>
        <label><input type="checkbox" data-timeline-toggle="warnings" checked /> Warnings</label>
        <label><input type="checkbox" data-timeline-toggle="metrics" checked /> Metrics</label>
        </div>
    </details>

    <details class="timeline-control-group">
        <summary>Jump</summary>
        <div class="timeline-jump-panel">
        <input class="form-control form-control-sm" type="search" placeholder="Search timeline..." data-timeline-search />
        <select class="form-select form-select-sm" data-timeline-jump>
            <option value="">Jump to scene</option>
            @foreach (var book in Model.Books)
            {
                @foreach (var chapter in book.Chapters)
                {
                    @foreach (var scene in chapter.Scenes)
                    {
                        <option value="@scene.SceneID">Ch @chapter.Chapter.ChapterNumber / Scene @scene.SceneNumber: @scene.SceneTitle</option>
                    }
                }
            }
        </select>
        <select class="form-select form-select-sm" data-timeline-warning-jump>
            <option value="">Jump to warning</option>
            @foreach (var scene in warningScenes)
            {
                <option value="@scene.SceneID">@scene.WarningCount warning@(scene.WarningCount == 1 ? "" : "s") - Scene @scene.SceneNumber: @scene.SceneTitle</option>
            }
        </select>
        <select class="form-select form-select-sm" data-timeline-entity-jump>
            <option value="">Jump to lane item</option>
            @foreach (var lane in Model.PlotLanes)
            {
                var firstScene = lane.SceneSlots.FirstOrDefault(x => x.Events.Any())?.Scene;
                if (firstScene is not null)
                {
                    <option value="@firstScene.SceneID">Plot line: @lane.PlotLine.PlotLineName</option>
                }
            }
            @foreach (var lane in Model.AssetLanes)
            {
                var firstScene = lane.SceneSlots.FirstOrDefault(x => x.Events.Any())?.Scene;
                if (firstScene is not null)
                {
                    <option value="@firstScene.SceneID">Asset: @lane.Asset.AssetName</option>
                }
            }
            @foreach (var lane in Model.CharacterLanes)
            {
                var firstScene = lane.SceneSlots.FirstOrDefault(x => x.Appearances.Any())?.Scene;
                if (firstScene is not null)
                {
                    <option value="@firstScene.SceneID">Character: @lane.Character.CharacterName</option>
                }
            }
            @foreach (var locationScene in Model.OrderedScenes.Where(x => !string.IsNullOrWhiteSpace(x.PrimaryLocationName)).GroupBy(x => x.PrimaryLocationName).Select(x => x.First()))
            {
                <option value="@locationScene.SceneID">Location: @locationScene.PrimaryLocationName</option>
            }
        </select>
        <span class="timeline-shortcut-hint">Shortcuts: arrows scroll, +/- zoom, Esc clears focus</span>
        </div>
    </details>

    <details class="timeline-control-group">
        <summary>Saved Views</summary>
        <div class="timeline-preset-panel">
        <form asp-action="SavePreset" method="post" data-timeline-preset-form>
            <input type="hidden" name="ProjectID" value="@Model.Project.ProjectID" />
            <input type="hidden" name="BookID" value="@Model.SelectedBookID" />
            <input type="hidden" name="VisibilityJson" value="{}" data-visibility-json />
            <input type="hidden" name="Filter.ProjectID" value="@Model.Project.ProjectID" />
            <input type="hidden" name="Filter.BookID" value="@Model.Filter.BookID" />
            <input type="hidden" name="Filter.SelectedSceneID" value="@Model.Filter.SelectedSceneID" />
            <input type="hidden" name="Filter.ChapterFromID" value="@Model.Filter.ChapterFromID" />
            <input type="hidden" name="Filter.ChapterToID" value="@Model.Filter.ChapterToID" />
            <input type="hidden" name="Filter.SceneFromID" value="@Model.Filter.SceneFromID" />
            <input type="hidden" name="Filter.SceneToID" value="@Model.Filter.SceneToID" />
            <input type="hidden" name="Filter.PlotLineID" value="@Model.Filter.PlotLineID" />
            <input type="hidden" name="Filter.PlotThreadID" value="@Model.Filter.PlotThreadID" />
            <input type="hidden" name="Filter.StoryAssetID" value="@Model.Filter.StoryAssetID" />
            <input type="hidden" name="Filter.CharacterID" value="@Model.Filter.CharacterID" />
            <input type="hidden" name="Filter.LocationID" value="@Model.Filter.LocationID" />
            <input type="hidden" name="Filter.WarningSeverityID" value="@Model.Filter.WarningSeverityID" />
            <input type="hidden" name="Filter.WarningTypeID" value="@Model.Filter.WarningTypeID" />
            <input type="hidden" name="Filter.RevisionStatusID" value="@Model.Filter.RevisionStatusID" />
            <input type="hidden" name="Filter.ScenePurposeTypeID" value="@Model.Filter.ScenePurposeTypeID" />
            <input type="hidden" name="Filter.POVCharacterID" value="@Model.Filter.POVCharacterID" />
            <input type="hidden" name="Filter.FocusType" value="@Model.Filter.FocusType" />
            <input type="hidden" name="Filter.FocusID" value="@Model.Filter.FocusID" />
            <input type="hidden" name="Filter.ShowWarningsOnly" value="@Model.Filter.ShowWarningsOnly.ToString().ToLowerInvariant()" />
            <input type="hidden" name="Filter.IncludeDismissedWarnings" value="@Model.Filter.IncludeDismissedWarnings.ToString().ToLowerInvariant()" />
            <input type="hidden" name="Filter.IncludeIntentionalWarnings" value="@Model.Filter.IncludeIntentionalWarnings.ToString().ToLowerInvariant()" />
            <input class="form-control form-control-sm" name="PresetName" placeholder="View name" />
            <button class="btn btn-outline-primary btn-sm" type="submit">Save view</button>
        </form>
        @if (Model.ViewPresets.Any())
        {
            <div class="preset-chip-row">
                @foreach (var preset in Model.ViewPresets)
                {
                    <span class="preset-chip">
                        <a asp-action="LoadPreset" asp-route-id="@preset.TimelineViewPresetID">@preset.PresetName</a>
                        <form asp-action="DeletePreset" method="post">
                            <input type="hidden" name="id" value="@preset.TimelineViewPresetID" />
                            <input type="hidden" name="projectId" value="@Model.Project.ProjectID" />
                            <input type="hidden" name="bookId" value="@Model.SelectedBookID" />
                            <button type="submit" title="Delete view">x</button>
                        </form>
                    </span>
                }
            </div>
        }
        </div>
    </details>
</section>

@if (!string.IsNullOrWhiteSpace(Model.FocusLabel))
{
    <section class="timeline-focus-banner">
        <strong>Focus: @Model.FocusLabel</strong>
        <span>@Model.FocusSceneIDs.Count matching scene@(Model.FocusSceneIDs.Count == 1 ? "" : "s")</span>
        <a class="btn btn-outline-secondary btn-sm" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Clear focus</a>
    </section>
}

@if (TempData["TimelineDragMessage"] is string dragMessage)
{
    <section class="timeline-focus-banner drag-message">
        <strong>@dragMessage</strong>
        <a class="btn btn-outline-secondary btn-sm" asp-controller="Warnings" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Review warnings</a>
    </section>
}

<details class="timeline-drag-palette" data-drag-palette>
    <summary>Drag Sources</summary>
    <div class="drag-chip-group">
        @foreach (var character in Model.CharacterOptions.Take(10))
        {
            <span class="drag-chip character" draggable="true" data-drag-type="character" data-drag-id="@character.Value" data-drag-label="@character.Text">@character.Text</span>
        }
        @foreach (var asset in Model.AssetOptions.Take(10))
        {
            <span class="drag-chip asset" draggable="true" data-drag-type="asset" data-drag-id="@asset.Value" data-drag-label="@asset.Text">@asset.Text</span>
        }
        @foreach (var location in Model.LocationOptions.Take(10))
        {
            <span class="drag-chip location" draggable="true" data-drag-type="location" data-drag-id="@location.Value" data-drag-label="@location.Text">@location.Text</span>
        }
    </div>
</details>

@if (Model.Books.Any())
{
    <section class="timeline-minimap" data-timeline-minimap>
        @foreach (var book in Model.Books)
        {
            @foreach (var chapter in book.Chapters)
            {
                var chapterWarnings = chapter.Scenes.Sum(x => x.WarningCount);
                <button type="button"
                        data-jump-scene="@chapter.Scenes.FirstOrDefault()?.SceneID"
                        style="--chapter-scenes:@Math.Max(chapter.Scenes.Count, 1); --chapter-warnings:@Math.Min(chapterWarnings, 8)"
                        title="Chapter @chapter.Chapter.ChapterNumber: @chapter.Chapter.ChapterTitle (@chapter.Scenes.Count scenes, @chapterWarnings warnings)">
                    <span>Ch @chapter.Chapter.ChapterNumber</span>
                </button>
            }
        }
    </section>
}

<section class="drag-drop-panel d-none" data-drag-drop-panel>
    <div class="drag-drop-panel-header">
        <div>
            <p class="eyebrow" data-drag-panel-kicker>Drag action</p>
            <h2 data-drag-panel-title>Confirm action</h2>
        </div>
        <button type="button" class="btn btn-outline-secondary btn-sm" data-drag-cancel>Cancel</button>
    </div>
    <p class="muted" data-drag-panel-summary></p>

    <form asp-controller="Timeline" asp-action="DropMoveScene" method="post" class="drag-drop-form d-none" data-drag-form="scene">
        <input type="hidden" name="ProjectID" value="@Model.Project.ProjectID" />
        <input type="hidden" name="BookID" value="@Model.SelectedBookID" />
        <input type="hidden" name="SceneID" />
        <input type="hidden" name="AnchorSceneID" />
        <input type="hidden" name="Position" />
        <div class="focused-validation-summary">
            <span>After moving, PlotLine will run continuity validation.</span>
            <span>Existing links, events, metrics, purposes, characters, assets, warnings and dependencies stay attached to the same SceneID.</span>
        </div>
        <div class="button-row mt-2">
            <button class="btn btn-primary btn-sm" type="submit">Move Scene</button>
            <button class="btn btn-outline-secondary btn-sm" type="button" data-drag-cancel>Cancel</button>
            <a class="btn btn-outline-secondary btn-sm" asp-controller="Warnings" asp-action="Index" asp-route-projectId="@Model.Project.ProjectID" asp-route-bookId="@Model.SelectedBookID">Review Warnings</a>
        </div>
    </form>

    <form asp-controller="Timeline" asp-action="DropCharacter" method="post" class="drag-drop-form d-none" data-drag-form="character">
        <input type="hidden" name="SceneID" />
        <input type="hidden" name="CharacterID" />
        <input type="hidden" name="ReturnProjectID" value="@Model.Project.ProjectID" />
        <input type="hidden" name="ReturnBookID" value="@Model.SelectedBookID" />
        <div class="row g-2">
            <div class="col-6"><label class="form-label">Role in scene</label><select class="form-select form-select-sm" name="RoleInSceneTypeID" asp-items="Model.CharacterRoleOptions"><option value="">Not set</option></select></div>
            <div class="col-6"><label class="form-label">Presence type</label><select class="form-select form-select-sm" name="PresenceTypeID" asp-items="Model.PresenceTypeOptions"><option value="">Not set</option></select></div>
            <div class="col-12"><label class="form-label">Current location</label><select class="form-select form-select-sm" name="LocationID" asp-items="Model.LocationOptions"><option value="">Optional</option></select></div>
        </div>
        <div class="button-row mt-2">
            <button class="btn btn-primary btn-sm" type="submit">Add Character</button>
            <button class="btn btn-outline-secondary btn-sm" type="button" data-drag-cancel>Cancel</button>
        </div>
    </form>

    <form asp-controller="Timeline" asp-action="DropAssetEvent" method="post" class="drag-drop-form d-none" data-drag-form="asset-event">
        <input type="hidden" name="SceneID" />
        <input type="hidden" name="StoryAssetID" />
        <input type="hidden" name="ReturnProjectID" value="@Model.Project.ProjectID" />
        <input type="hidden" name="ReturnBookID" value="@Model.SelectedBookID" />
        <div class="row g-2">
            <div class="col-6"><label class="form-label">Event type</label><select class="form-select form-select-sm" name="AssetEventTypeID" asp-items="Model.AssetEventTypeOptions"></select></div>
            <div class="col-6"><label class="form-label">State transition</label><select class="form-select form-select-sm" name="ToStateID" asp-items="Model.AssetStateOptions"><option value="">Optional</option></select></div>
            <div class="col-12"><label class="form-label">Location</label><select class="form-select form-select-sm" name="LocationID" asp-items="Model.LocationOptions"><option value="">Optional</option></select></div>
            <div class="col-12"><label class="form-label">Event title</label><input class="form-control form-control-sm" name="EventTitle" /></div>
            <div class="col-12"><label class="form-label">Custody note</label><textarea class="form-control form-control-sm" name="CustodyNote" rows="2"></textarea></div>
        </div>
        <div class="button-row mt-2">
            <button class="btn btn-primary btn-sm" type="submit">Add Asset Event</button>
            <button class="btn btn-outline-secondary btn-sm" type="button" data-drag-cancel>Cancel</button>
        </div>
    </form>

    <form asp-controller="Timeline" asp-action="DropAssetDependency" method="post" class="drag-drop-form d-none" data-drag-form="asset-dependency">
        <input type="hidden" name="ProjectID" value="@Model.Project.ProjectID" />
        <input type="hidden" name="ReturnProjectID" value="@Model.Project.ProjectID" />
        <input type="hidden" name="ReturnBookID" value="@Model.SelectedBookID" />
        <input type="hidden" name="SourceAssetID" />
        <input type="hidden" name="TargetAssetID" />
        <div class="row g-2">
            <div class="col-12"><label class="form-label">Dependency type</label><select class="form-select form-select-sm" name="AssetDependencyTypeID" asp-items="Model.AssetDependencyTypeOptions"></select></div>
            <div class="col-6"><label class="form-label">Source required state</label><select class="form-select form-select-sm" name="SourceRequiredStateID" asp-items="Model.AssetStateOptions"><option value="">Optional</option></select></div>
            <div class="col-6"><label class="form-label">Target blocked state</label><select class="form-select form-select-sm" name="TargetBlockedStateID" asp-items="Model.AssetStateOptions"><option value="">Optional</option></select></div>
            <div class="col-12"><label class="form-label">Notes</label><textarea class="form-control form-control-sm" name="Description" rows="2"></textarea></div>
        </div>
        <p class="plain-preview" data-asset-dependency-preview></p>
        <div class="button-row mt-2">
            <button class="btn btn-primary btn-sm" type="submit">Save Dependency</button>
            <button class="btn btn-outline-secondary btn-sm" type="button" data-drag-cancel>Cancel</button>
        </div>
    </form>

    <form asp-controller="Timeline" asp-action="DropLocationRelationship" method="post" class="drag-drop-form d-none" data-drag-form="location-relationship">
        <input type="hidden" name="ProjectID" value="@Model.Project.ProjectID" />
        <input type="hidden" name="ReturnBookID" value="@Model.SelectedBookID" />
        <input type="hidden" name="FromLocationID" />
        <input type="hidden" name="ToLocationID" />
        <div class="row g-2">
            <div class="col-12"><label class="form-label">Relationship type</label><select class="form-select form-select-sm" name="LocationRelationshipTypeID" asp-items="Model.LocationRelationshipTypeOptions"></select></div>
            <div class="col-12 drag-check-grid">
                <label><input type="checkbox" name="IsBidirectional" value="true" /> Bidirectional</label>
                <label><input type="checkbox" name="CanHearNormalSpeech" value="true" /> Can hear speech</label>
                <label><input type="checkbox" name="CanHearLoudNoise" value="true" /> Can hear loud noise</label>
                <label><input type="checkbox" name="CanSeeMovement" value="true" /> Can see movement</label>
                <label><input type="checkbox" name="CanSeeClearly" value="true" /> Can see clearly</label>
                <label><input type="checkbox" name="CanTravelDirectly" value="true" /> Can travel directly</label>
            </div>
            <div class="col-12"><label class="form-label">Notes</label><textarea class="form-control form-control-sm" name="Notes" rows="2"></textarea></div>
        </div>
        <div class="button-row mt-2">
            <button class="btn btn-primary btn-sm" type="submit">Save</button>
            <button class="btn btn-outline-secondary btn-sm" type="button" data-drag-cancel>Cancel</button>
        </div>
    </form>
</section>

@if (!Model.Books.Any())
{
    <section class="empty-panel">
        <h2>No timeline yet</h2>
        <p>Add books, chapters and scenes to see them arranged here in narrative order.</p>
    </section>
}
else
{
    <div class="workspace-layout timeline-filtered-root" data-timeline-root>
        <main class="timeline-workspace">
            <section class="timeline-shell workspace-timeline" data-timeline-section="scene-cards" style="--scene-count:@timelineColumns.Count">
                <div class="timeline-section-header" data-collapse-target="scene-cards">
                    <button type="button" data-collapse-toggle="scene-cards">Scene Cards</button>
                    <span>@Model.OrderedScenes.Count scene@(Model.OrderedScenes.Count == 1 ? "" : "s")</span>
                </div>
                <div data-collapse-body="scene-cards">
                <div class="timeline-series-row">
                    <div class="timeline-project-title">
                        <span>Project / Series</span>
                        <strong>@Model.Project.ProjectName</strong>
                    </div>
                    <div class="timeline-books">
                    @foreach (var book in Model.Books)
                    {
                        <div class="timeline-book" style="--book-scene-count:@BookSceneColumns(book)">
                            <div class="timeline-book-title">
                                <span>Book @book.Book.BookNumber</span>
                                <strong>@book.Book.BookTitle</strong>
                            </div>
                            <div class="timeline-chapters">
                            @if (!book.Chapters.Any())
                            {
                                <div class="timeline-chapter" style="--chapter-scene-count:1">
                                    <div class="timeline-chapter-title">
                                        <span>No chapters</span>
                                        <strong>Start planning</strong>
                                    </div>
                                    <div class="timeline-scenes">
                                        <div class="timeline-empty-scene timeline-placeholder-scene is-placeholder">No scenes</div>
                                    </div>
                                </div>
                            }
                            else
                            {
                                @foreach (var chapter in book.Chapters)
                                {
                                    <div class="timeline-chapter" style="--chapter-scene-count:@ChapterSceneColumns(chapter)">
                                        <div class="timeline-chapter-title">
                                            <span>Chapter @chapter.Chapter.ChapterNumber</span>
                                            <strong>@chapter.Chapter.ChapterTitle</strong>
                                        </div>
                                        <div class="timeline-scenes">
                                            @if (!chapter.Scenes.Any())
                                            {
                                                <div class="timeline-empty-scene timeline-placeholder-scene is-placeholder">No scenes</div>
                                            }
                                            else
                                            {
                                                @foreach (var scene in chapter.Scenes)
                                                {
                                                    var selectedClass = scene.SceneID == Model.SelectedSceneID ? "selected" : "";
                                                    var matchClass = Model.MatchingSceneIDs.Contains(scene.SceneID) ? "filter-match" : "filter-dim";
                                                    var focusClass = Model.FocusSceneIDs.Contains(scene.SceneID) ? "focus-match" : (Model.FocusSceneIDs.Any() ? "focus-dim" : "");
                                                    var povLabel = Model.ScenePovLabels.GetValueOrDefault(scene.SceneID, scene.POVCharacterID.HasValue ? "POV set" : "No POV");
                                                    var metricSummary = string.Join(" / ", Model.MetricGraphs.Take(2).Select(graph => $"{graph.MetricName}: {graph.Points.FirstOrDefault(x => x.SceneID == scene.SceneID)?.Value ?? 0}"));
                                                    var plotSearch = string.Join(' ', Model.PlotLanes
                                                        .SelectMany(x => x.SceneSlots.Where(slot => slot.Scene.SceneID == scene.SceneID).SelectMany(slot => slot.Events.Select(evt => $"{x.PlotLine.PlotLineName} {evt.ThreadTitle} {evt.EventTitle}"))));
                                                    var assetSearch = string.Join(' ', Model.AssetLanes
                                                        .SelectMany(x => x.SceneSlots.Where(slot => slot.Scene.SceneID == scene.SceneID).SelectMany(slot => slot.Events.Select(evt => $"{x.Asset.AssetName} {evt.EventTitle}"))));
                                                    var characterSearch = string.Join(' ', Model.CharacterLanes
                                                        .SelectMany(x => x.SceneSlots.Where(slot => slot.Scene.SceneID == scene.SceneID).SelectMany(slot => slot.Appearances.Select(appearance => $"{x.Character.CharacterName} {appearance.RoleInSceneTypeName} {appearance.PresenceTypeName}"))));
                                                    var warningSearch = scene.WarningCount > 0 ? "warning warnings continuity" : "";
                                                    var searchText = $"{scene.SceneNumber} {scene.SceneTitle} {scene.Summary} {povLabel} {scene.PrimaryLocationName} {string.Join(' ', scene.PurposeLabels.Select(x => x.PurposeName))} {plotSearch} {assetSearch} {characterSearch} {warningSearch}";
                                                    <a class="timeline-scene-card @selectedClass @matchClass @focusClass"
                                                       draggable="true"
                                                       data-scene-id="@scene.SceneID"
                                                       data-drag-type="scene"
                                                       data-drag-id="@scene.SceneID"
                                                       data-drag-label="Scene @scene.SceneNumber: @scene.SceneTitle"
                                                       data-chapter-id="@chapter.Chapter.ChapterID"
                                                       data-chapter-label="Chapter @chapter.Chapter.ChapterNumber: @chapter.Chapter.ChapterTitle"
                                                       data-timeline-search-text="@searchText"
                                                       asp-controller="Timeline"
                                                       asp-action="Index"
                                                       asp-route-ProjectID="@Model.Project.ProjectID"
                                                       asp-route-BookID="@Model.SelectedBookID"
                                                       asp-route-SelectedSceneID="@scene.SceneID"
                                                       asp-route-FocusType="scene"
                                                       asp-route-FocusID="@scene.SceneID"
                                                       title="Scene @scene.SceneNumber: @scene.SceneTitle&#10;POV: @povLabel&#10;Location: @(scene.PrimaryLocationName ?? "No location")&#10;@scene.Summary">
                                                        <span class="scene-number">Scene @scene.SceneNumber</span>
                                                        <strong>@scene.SceneTitle</strong>
                                                        <span class="scene-pov-label">@povLabel</span>
                                                        <div class="scene-badge-row">
                                                            <span class="status-pill">@scene.RevisionStatusName</span>
                                                            @if (scene.WarningCount > 0)
                                                            {
                                                                <span class="warning-placeholder active" data-warning-marker>@scene.WarningCount warning@(scene.WarningCount == 1 ? "" : "s")</span>
                                                            }
                                                            else
                                                            {
                                                                <span class="warning-placeholder">Warnings 0</span>
                                                            }
                                                            @if (scene.DependencyCount > 0)
                                                            {
                                                                <span class="dependency-placeholder">@scene.DependencyCount dep@(scene.DependencyCount == 1 ? "" : "s")</span>
                                                            }
                                                        </div>
                                                        <span class="time-label">@scene.TimeLabel</span>
                                                        @if (!string.IsNullOrWhiteSpace(scene.PrimaryLocationName))
                                                        {
                                                            <span class="location-pill" data-location-marker title="@scene.PrimaryLocationPath">@scene.PrimaryLocationName</span>
                                                        }
                                                        @if (!string.IsNullOrWhiteSpace(metricSummary))
                                                        {
                                                            <span class="metric-mini-summary">@metricSummary</span>
                                                        }
                                                        @if (scene.PurposeLabels.Any())
                                                        {
                                                            <div class="purpose-chip-row">
                                                                @foreach (var purpose in scene.PurposeLabels.Take(3))
                                                                {
                                                                    <span class="purpose-chip">@purpose.PurposeName</span>
                                                                }
                                                            </div>
                                                        }
                                                        <span class="scene-summary">@scene.Summary</span>
                                                    </a>
                                                }
                                            }
                                        </div>
                                    </div>
                                }
                            }
                            </div>
                        </div>
                    }
                    </div>
                </div>
                </div>
                @if (Model.PlotLanes.Any() && Model.OrderedScenes.Any())
                {
                    <div class="plot-lane-board" data-timeline-section="plot-lines" style="--scene-count:@timelineColumns.Count">
                        <div class="lane-board-heading plot-lane-board-heading">
                            <button type="button" data-collapse-toggle="plot-lines">Plot line lanes</button>
                            <small>Thread event markers by scene</small>
                        </div>
                        <div data-collapse-body="plot-lines">
                        @foreach (var group in Model.PlotLanes.GroupBy(x => x.PlotLine.PlotLineTypeName).OrderBy(x => x.Key))
                        {
                            <div class="lane-group">
                                <button type="button" class="lane-group-heading" data-collapse-toggle="plot-group-@group.Key.GetHashCode()">@group.Key</button>
                                <div data-collapse-body="plot-group-@group.Key.GetHashCode()">
                        @foreach (var lane in Model.PlotLanes)
                        {
                            if (lane.PlotLine.PlotLineTypeName != group.Key) { continue; }
                            var laneFocusClass = Model.Filter.FocusType == "plotline" && Model.Filter.FocusID.HasValue && Model.Filter.FocusID != lane.PlotLine.PlotLineID ? "lane-dim" : "";
                            <div class="plot-lane-row @laneFocusClass" style="--plot-colour:@lane.PlotLine.Colour">
                                <a class="plot-lane-label" asp-controller="PlotLines" asp-action="Edit" asp-route-id="@lane.PlotLine.PlotLineID">
                                    <span class="colour-swatch" style="background:@lane.PlotLine.Colour"></span>
                                    <strong>@lane.PlotLine.PlotLineName</strong>
                                </a>
                                <div class="plot-lane-slots">
                                    @foreach (var column in timelineColumns)
                                    {
                                        if (column.Scene is not Scene realPlotScene)
                                        {
                                            <div class="plot-lane-slot timeline-placeholder-cell is-placeholder" title="@column.PlaceholderLabel"></div>
                                            continue;
                                        }

                                        var slot = lane.SceneSlots.FirstOrDefault(x => x.Scene.SceneID == realPlotScene.SceneID);
                                        <div class="plot-lane-slot" title="Scene @realPlotScene.SceneNumber: @realPlotScene.SceneTitle">
                                            @foreach (var threadEvent in slot?.Events ?? Enumerable.Empty<ThreadEvent>())
                                            {
                                                var markerClass = threadEvent.EventTypeName is "Resolved" or "Payoff"
                                                    ? "resolved"
                                                    : threadEvent.EventTypeName is "Contradicted"
                                                        ? "contradicted"
                                                        : "";
                                                <a class="thread-marker @markerClass"
                                                   asp-controller="Timeline"
                                                   asp-action="Index"
                                                   asp-route-ProjectID="@Model.Project.ProjectID"
                                                   asp-route-BookID="@Model.SelectedBookID"
                                                   asp-route-SelectedSceneID="@realPlotScene.SceneID"
                                                   asp-route-FocusType="plotthread"
                                                   asp-route-FocusID="@threadEvent.PlotThreadID"
                                                   title="@threadEvent.ThreadTitle: @threadEvent.EventTitle">
                                                    @threadEvent.MarkerText
                                                </a>
                                            }
                                        </div>
                                    }
                                </div>
                            </div>
                        }
                                </div>
                            </div>
                        }
                        </div>
                    </div>
                }
                else
                {
                    <div class="future-lane-placeholder">
                        Add visible plot lines and thread events to see narrative lanes here.
                    </div>
                }
                @if (Model.AssetLanes.Any() && Model.OrderedScenes.Any())
                {
                    <div class="asset-lane-board" data-timeline-section="assets" style="--scene-count:@timelineColumns.Count">
                        <div class="lane-board-heading asset-lane-board-heading">
                            <button type="button" data-collapse-toggle="assets">Story asset lanes</button>
                            <small>Asset event markers by scene</small>
                        </div>
                        <div data-collapse-body="assets">
                        @foreach (var group in Model.AssetLanes.GroupBy(x => x.Asset.Importance >= 8 ? "High importance" : "Other assets"))
                        {
                            <div class="lane-group">
                                <button type="button" class="lane-group-heading" data-collapse-toggle="asset-group-@group.Key.GetHashCode()">@group.Key</button>
                                <div data-collapse-body="asset-group-@group.Key.GetHashCode()">
                        @foreach (var lane in Model.AssetLanes)
                        {
                            if ((lane.Asset.Importance >= 8 ? "High importance" : "Other assets") != group.Key) { continue; }
                            var assetFocusClass = Model.Filter.FocusType == "asset" && Model.Filter.FocusID.HasValue && Model.Filter.FocusID != lane.Asset.StoryAssetID ? "lane-dim" : "";
                            <div class="asset-lane-row @assetFocusClass">
                                <a class="asset-lane-label" draggable="true" data-drag-type="asset" data-drag-id="@lane.Asset.StoryAssetID" data-drag-label="@lane.Asset.AssetName" data-asset-drop-target="true" data-asset-id="@lane.Asset.StoryAssetID" data-asset-label="@lane.Asset.AssetName" asp-controller="StoryAssets" asp-action="Details" asp-route-id="@lane.Asset.StoryAssetID">
                                    <strong>@lane.Asset.AssetName</strong>
                                    <span>@lane.Asset.KindName / @lane.Asset.Importance</span>
                                </a>
                                <div class="asset-lane-slots">
                                    @foreach (var column in timelineColumns)
                                    {
                                        if (column.Scene is not Scene realAssetScene)
                                        {
                                            <div class="asset-lane-slot timeline-placeholder-cell is-placeholder" title="@column.PlaceholderLabel"></div>
                                            continue;
                                        }

                                        var slot = lane.SceneSlots.FirstOrDefault(x => x.Scene.SceneID == realAssetScene.SceneID);
                                        <div class="asset-lane-slot" title="Scene @realAssetScene.SceneNumber: @realAssetScene.SceneTitle">
                                            @foreach (var assetEvent in slot?.Events ?? Enumerable.Empty<AssetEvent>())
                                            {
                                                <a class="asset-marker"
                                                   asp-controller="Timeline"
                                                   asp-action="Index"
                                                   asp-route-ProjectID="@Model.Project.ProjectID"
                                                   asp-route-BookID="@Model.SelectedBookID"
                                                   asp-route-SelectedSceneID="@realAssetScene.SceneID"
                                                   asp-route-FocusType="asset"
                                                   asp-route-FocusID="@assetEvent.StoryAssetID"
                                                   title="@assetEvent.AssetName: @assetEvent.EventTitle">
                                                    @assetEvent.MarkerText
                                                </a>
                                            }
                                        </div>
                                    }
                                </div>
                            </div>
                        }
                                </div>
                            </div>
                        }
                        </div>
                    </div>
                }
                else
                {
                    <div class="future-lane-placeholder">
                        Add story assets and asset events to see asset lanes here.
                    </div>
                }
                @if (Model.CharacterLanes.Any() && Model.OrderedScenes.Any())
                {
                    <div class="character-lane-board" data-timeline-section="characters" style="--scene-count:@timelineColumns.Count">
                        <div class="lane-board-heading character-lane-board-heading">
                            <button type="button" data-collapse-toggle="characters">Character appearances</button>
                            <small>First twelve project characters</small>
                        </div>
                        <div data-collapse-body="characters">
                        @foreach (var group in Model.CharacterLanes.Select((lane, index) => new { lane, group = index < 6 ? "Major characters" : "Secondary characters" }).GroupBy(x => x.group))
                        {
                            <div class="lane-group">
                                <button type="button" class="lane-group-heading" data-collapse-toggle="character-group-@group.Key.GetHashCode()">@group.Key</button>
                                <div data-collapse-body="character-group-@group.Key.GetHashCode()">
                        @foreach (var laneItem in group)
                        {
                            var lane = laneItem.lane;
                            var characterFocusClass = Model.Filter.FocusType == "character" && Model.Filter.FocusID.HasValue && Model.Filter.FocusID != lane.Character.CharacterID ? "lane-dim" : "";
                            <div class="character-lane-row @characterFocusClass">
                                <a class="character-lane-label" asp-controller="Characters" asp-action="Details" asp-route-id="@lane.Character.CharacterID">
                                    <strong>@lane.Character.CharacterName</strong>
                                    <span>@(lane.Character.ShortName ?? "Character")</span>
                                </a>
                                <div class="character-lane-slots">
                                    @foreach (var column in timelineColumns)
                                    {
                                        if (column.Scene is not Scene realCharacterScene)
                                        {
                                            <div class="character-lane-slot timeline-placeholder-cell is-placeholder" title="@column.PlaceholderLabel"></div>
                                            continue;
                                        }

                                        var slot = lane.SceneSlots.FirstOrDefault(x => x.Scene.SceneID == realCharacterScene.SceneID);
                                        <div class="character-lane-slot" title="Scene @realCharacterScene.SceneNumber: @realCharacterScene.SceneTitle">
                                            @foreach (var appearance in slot?.Appearances ?? Enumerable.Empty<SceneCharacter>())
                                            {
                                                <a class="character-marker"
                                                   asp-controller="Timeline"
                                                   asp-action="Index"
                                                   asp-route-ProjectID="@Model.Project.ProjectID"
                                                   asp-route-BookID="@Model.SelectedBookID"
                                                   asp-route-SelectedSceneID="@realCharacterScene.SceneID"
                                                   asp-route-FocusType="character"
                                                   asp-route-FocusID="@appearance.CharacterID"
                                                   title="@appearance.CharacterName: @appearance.RoleInSceneTypeName / @appearance.PresenceTypeName">
                                                    @(!string.IsNullOrWhiteSpace(appearance.PresenceTypeName) ? appearance.PresenceTypeName.Substring(0, 1) : "C")
                                                </a>
                                            }
                                        </div>
                                    }
                                </div>
                            </div>
                        }
                                </div>
                            </div>
                        }
                        </div>
                    </div>
                }
                else
                {
                    <div class="future-lane-placeholder">
                        Add characters to scenes to see character appearance lanes here.
                    </div>
                }
            </section>

            <section class="pacing-panel" data-timeline-section="metrics">
                <div class="pacing-heading">
                    <div>
                        <p class="eyebrow">Pacing</p>
                        <h2><button type="button" data-collapse-toggle="metrics">Metric shape</button></h2>
                    </div>
                    <span class="muted">@Model.OrderedScenes.Count scene@(Model.OrderedScenes.Count == 1 ? "" : "s")</span>
                </div>
                <div data-collapse-body="metrics">
                @if (!Model.MetricGraphs.Any() || !Model.OrderedScenes.Any())
                {
                    <p class="muted">Add scenes to begin seeing emotional and pacing shape.</p>
                }
                else
                {
                    <div class="metric-shape-chart" data-metric-shape-chart>
                        <p class="metric-shape-intro">Compare selected metrics across the same scene timeline. Click a point to focus that scene.</p>
                        <div class="metric-toggle-row" data-metric-toggles></div>
                        <div class="metric-chart-frame">
                            <canvas aria-label="Comparative scene metric line graph"></canvas>
                            <p class="muted d-none" data-chart-fallback>Metric chart could not load. The raw metric rows are still available below.</p>
                        </div>
                        <script type="application/json">@Html.Raw(System.Text.Json.JsonSerializer.Serialize(timelineMetricShapePayload))</script>
                    </div>
                    <details class="metric-raw-details">
                        <summary>Show raw metric rows</summary>
                        <div class="metric-graph-stack mt-2">
                            @foreach (var graph in Model.MetricGraphs)
                            {
                                <div class="metric-graph-row">
                                    <div class="metric-graph-label">@graph.MetricName</div>
                                    <div class="metric-graph-points" style="--scene-count:@Math.Max(timelineColumns.Count, 1)">
                                        @foreach (var column in timelineColumns)
                                        {
                                            if (column.Scene is null)
                                            {
                                                <span class="metric-point metric-point-placeholder timeline-placeholder-cell is-placeholder" title="@column.PlaceholderLabel"><span>No value</span></span>
                                                continue;
                                            }

                                            var point = graph.Points.FirstOrDefault(x => x.SceneID == column.Scene.SceneID);
                                            if (point is null)
                                            {
                                                <span class="metric-point metric-point-placeholder timeline-placeholder-cell is-placeholder" title="No metric value"><span>No value</span></span>
                                                continue;
                                            }

                                            <a asp-controller="Timeline"
                                                asp-action="Index"
                                                asp-route-projectId="@Model.Project.ProjectID"
                                                asp-route-bookId="@Model.SelectedBookID"
                                                asp-route-selectedSceneId="@point.SceneID"
                                                class="metric-point"
                                                style="--metric-height:@point.Percent%"
                                                title="Scene @point.SceneNumber: @point.SceneTitle - @point.Value">
                                                 <span>@point.Value</span>
                                             </a>
                                        }
                                    </div>
                                </div>
                            }
                        </div>
                    </details>
                }
                </div>
            </section>
        </main>

        <aside class="scene-inspector-panel">
            @if (Model.SelectedScene is null)
            {
                <div class="inspector-empty">
                    <p class="eyebrow">Scene inspector</p>
                    <h2>Select a scene</h2>
                    <p>Click a scene card to edit its summary, timing, purposes, outcomes and metric sliders without leaving the timeline.</p>
                </div>
            }
            else
            {
                <div class="inspector-header">
                    <p class="eyebrow">Scene inspector</p>
                    <h2>@Model.SelectedScene.SceneTitle</h2>
                </div>
                <partial name="~/Views/Scenes/_SceneInspector.cshtml" model="Model.SelectedScene" />
            }
        </aside>
    </div>
}

@section Scripts {
    <partial name="_ValidationScriptsPartial" />
}