diff --git a/static/base.css b/static/base.css
index 6fc9acd..6a9ede5 100644
--- a/static/base.css
+++ b/static/base.css
@@ -18,9 +18,6 @@
     --font-monospace: "Iosevka Hyperlegible", monospace;
     --line-height: 1.5;
     --line-height-em: 1.5em;
-
-    --z-resize-handle: 50;
-    --z-modal: 100;
 }
 
 /* Reset */
@@ -95,10 +92,6 @@ button.icon {
 input {
     border: none;
     border-bottom: 1px solid var(--color-panel-border);
-
-    &:hover:not(:focus) {
-        background-color: var(--color-shaded-background);
-    }
 }
 
 *:focus-visible {
@@ -108,23 +101,14 @@ input {
 
 /* Modal dialogs */
 
-dialog {
-    &:not([open]) {
-        /* Default to dialogs being invisible.
-           Otherwise dialogs placed on the page via HTML display on top of everything. */
-        display: none;
-    }
-
-    &::backdrop {
-        background-color: var(--dialog-backdrop);
-        backdrop-filter: blur(8px);
-    }
-}
-
 dialog:not([open]) {
+    /* Weird this doesn't seem to work by default. */
+    display: none;
 }
 
 dialog::backdrop {
+    background-color: var(--dialog-backdrop);
+    backdrop-filter: blur(8px);
 }
 
 /* Details */
@@ -233,6 +217,8 @@ abbr {
 
 .icon {
     vertical-align: middle;
+    width: 16px;
+    height: 16px;
 
     background-repeat: no-repeat;
     background-position: 50% 50%;
diff --git a/static/brush-box.js b/static/brush-box.js
index 3470c94..1c2bc92 100644
--- a/static/brush-box.js
+++ b/static/brush-box.js
@@ -132,6 +132,8 @@ export class BrushBox extends HTMLElement {
     connectedCallback() {
         this.saveData.attachToElement(this);
 
+        this.classList.add("rkgk-panel");
+
         this.brushes = [];
 
         this.brushesContainer = this.appendChild(document.createElement("div"));
diff --git a/static/brush-editor.js b/static/brush-editor.js
index ad97df1..8e4f611 100644
--- a/static/brush-editor.js
+++ b/static/brush-editor.js
@@ -1,9 +1,6 @@
 import { CodeEditor, Selection } from "rkgk/code-editor.js";
 import { SaveData } from "rkgk/framework.js";
 import { builtInPresets } from "rkgk/brush-box.js";
-import { ResizeHandle } from "rkgk/resize-handle.js";
-import { BrushPreview } from "rkgk/brush-preview.js";
-import { BrushCostGauges } from "rkgk/brush-cost.js";
 
 export class BrushEditor extends HTMLElement {
     saveData = new SaveData("brushEditor");
@@ -13,14 +10,13 @@ export class BrushEditor extends HTMLElement {
     }
 
     connectedCallback() {
+        this.classList.add("rkgk-panel");
+
         this.saveData.attachToElement(this);
 
         const defaultBrush = builtInPresets[0];
 
-        this.editorContainer = this.appendChild(document.createElement("div"));
-        this.editorContainer.classList.add("editor");
-
-        this.nameEditor = this.editorContainer.appendChild(document.createElement("input"));
+        this.nameEditor = this.appendChild(document.createElement("input"));
         this.nameEditor.value = this.saveData.get("name", defaultBrush.name);
         this.nameEditor.classList.add("name");
         this.nameEditor.addEventListener("input", () => {
@@ -35,7 +31,7 @@ export class BrushEditor extends HTMLElement {
             );
         });
 
-        this.codeEditor = this.editorContainer.appendChild(
+        this.codeEditor = this.appendChild(
             new CodeEditor([
                 {
                     className: "layer-syntax",
@@ -63,28 +59,11 @@ export class BrushEditor extends HTMLElement {
             );
         });
 
-        this.output = document.createElement("output");
+        this.errorHeader = this.appendChild(document.createElement("h1"));
+        this.errorHeader.classList.add("error-header");
 
-        this.appendChild(
-            new ResizeHandle({
-                direction: "horizontal",
-                inverse: true,
-                targetElement: this,
-                targetProperty: "--brush-preview-height",
-                initSize: 192,
-                minSize: 64,
-            }),
-        ).classList.add("always-visible");
-
-        this.appendChild(this.output);
-
-        this.ok = this.output.appendChild(document.createElement("div"));
-        this.ok.classList.add("ok");
-        this.brushPreview = this.ok.appendChild(new BrushPreview());
-        this.brushCostGauges = this.ok.appendChild(new BrushCostGauges());
-
-        this.errors = this.output.appendChild(document.createElement("pre"));
-        this.errors.classList.add("errors");
+        this.errorArea = this.appendChild(document.createElement("pre"));
+        this.errorArea.classList.add("errors");
 
         // NOTE(localStorage): Migration from old storage key.
         localStorage.removeItem("rkgk.brushEditor.code");
@@ -108,19 +87,11 @@ export class BrushEditor extends HTMLElement {
     }
 
     resetErrors() {
-        this.output.dataset.state = "ok";
-        this.errors.textContent = "";
+        this.errorHeader.textContent = "";
+        this.errorArea.textContent = "";
     }
 
-    async updatePreview(haku, { getStats }) {
-        let previewResult = await this.brushPreview.renderBrush(haku);
-        this.brushCostGauges.update(getStats());
-        if (previewResult.status == "error") {
-            this.renderHakuResult(previewResult.result);
-        }
-    }
-
-    renderHakuResult(result) {
+    renderHakuResult(phase, result) {
         this.resetErrors();
         this.errorSquiggles = null;
 
@@ -131,7 +102,7 @@ export class BrushEditor extends HTMLElement {
             return;
         }
 
-        this.output.dataset.state = "error";
+        this.errorHeader.textContent = `${phase} failed`;
 
         if (result.errorKind == "diagnostics") {
             this.codeEditor.rebuildLineMap();
@@ -141,13 +112,13 @@ export class BrushEditor extends HTMLElement {
             );
             this.codeEditor.renderLayer("layer-error-squiggles");
 
-            this.errors.textContent = result.diagnostics
+            this.errorArea.textContent = result.diagnostics
                 .map(
                     (diagnostic) => `${diagnostic.start}..${diagnostic.end}: ${diagnostic.message}`,
                 )
                 .join("\n");
         } else if (result.errorKind == "plain") {
-            this.errors.textContent = result.message;
+            this.errorHeader.textContent = result.message;
         } else if (result.errorKind == "exception") {
             let renderer = new ErrorException(result);
             let squiggles = renderer.prepareSquiggles();
@@ -173,11 +144,11 @@ export class BrushEditor extends HTMLElement {
                 this.codeEditor.setSelection(new Selection(span.start, span.end));
             });
 
-            this.errors.replaceChildren();
-            this.errors.appendChild(renderer);
+            this.errorArea.replaceChildren();
+            this.errorArea.appendChild(renderer);
         } else {
             console.warn(`unknown error kind: ${result.errorKind}`);
-            this.errors.textContent = "(unknown error kind)";
+            this.errorHeader.textContent = "(unknown error kind)";
         }
     }
 
diff --git a/static/brush-preview.js b/static/brush-preview.js
index 97a2015..1697415 100644
--- a/static/brush-preview.js
+++ b/static/brush-preview.js
@@ -13,24 +13,16 @@ export class BrushPreview extends HTMLElement {
         this.ctx = this.canvas.getContext("2d");
 
         this.#resizeCanvas();
-        if (this.width == null || this.height == null) {
-            new ResizeObserver(() => this.#resizeCanvas()).observe(this);
-        }
     }
 
     #resizeCanvas() {
         this.canvas.width = this.width ?? this.clientWidth;
         this.canvas.height = this.height ?? this.clientHeight;
 
-        // This can happen if the element's `display: none`.
-        if (this.canvas.width == 0 || this.canvas.height == 0) return;
-
         if (this.pixmap != null) {
             this.pixmap.destroy();
         }
         this.pixmap = new Pixmap(this.canvas.width, this.canvas.height);
-
-        this.dispatchEvent(new Event(".pixmapLost"));
     }
 
     async #renderBrushInner(haku) {
@@ -39,9 +31,9 @@ export class BrushPreview extends HTMLElement {
             runDotter: async () => {
                 return {
                     fromX: this.canvas.width / 2,
-                    fromY: this.canvas.height / 2,
+                    fromY: this.canvas.width / 2,
                     toX: this.canvas.width / 2,
-                    toY: this.canvas.height / 2,
+                    toY: this.canvas.width / 2,
                     num: 0,
                 };
             },
diff --git a/static/canvas-renderer.js b/static/canvas-renderer.js
index 6b5821b..95d07e7 100644
--- a/static/canvas-renderer.js
+++ b/static/canvas-renderer.js
@@ -451,10 +451,10 @@ class CanvasRenderer extends HTMLElement {
 
     async #cursorReportingBehaviour() {
         while (true) {
-            let event = await listen([window, "mousemove"]);
+            let event = await listen([this, "mousemove"]);
             let [x, y] = this.viewport.toViewportSpace(
                 event.clientX - this.clientLeft,
-                event.clientY - this.clientTop,
+                event.offsetY - this.clientTop,
                 this.getWindowSize(),
             );
             this.dispatchEvent(Object.assign(new Event(".cursor"), { x, y }));
@@ -493,7 +493,10 @@ class InteractEvent extends Event {
 
     continueAsDotter() {
         (async () => {
-            let event = await listen([window, "mousemove"], [window, "mouseup"]);
+            let event = await listen(
+                [this.canvasRenderer, "mousemove"],
+                [this.canvasRenderer, "mouseup"],
+            );
 
             if (event.type == "mousemove") {
                 let [mouseX, mouseY] = this.canvasRenderer.viewport.toViewportSpace(
diff --git a/static/code-editor.js b/static/code-editor.js
index e71d614..b0197f1 100644
--- a/static/code-editor.js
+++ b/static/code-editor.js
@@ -44,9 +44,6 @@ export class CodeEditor extends HTMLElement {
         this.undoHistory = [];
         this.undoHistoryTop = 0;
 
-        this.textArea.addEventListener("input", () => {
-            this.#codeChanged();
-        });
         this.#textAreaAutoSizingBehaviour();
         this.#keyShortcutBehaviours();
 
@@ -79,6 +76,9 @@ export class CodeEditor extends HTMLElement {
     // Resizing the text area
 
     #textAreaAutoSizingBehaviour() {
+        this.textArea.addEventListener("input", () => {
+            this.#codeChanged();
+        });
         this.#resizeTextArea();
         document.fonts.addEventListener("loadingdone", () => this.#resizeTextArea());
         new ResizeObserver(() => this.#resizeTextArea()).observe(this.textArea);
diff --git a/static/framework.js b/static/framework.js
index ed382e1..cf18f65 100644
--- a/static/framework.js
+++ b/static/framework.js
@@ -65,7 +65,7 @@ export class SaveData {
     }
 
     attachToElement(element) {
-        this.elementId = element.id;
+        this.elementId = element.dataset.storageId;
     }
 
     getRaw(key) {
diff --git a/static/index.css b/static/index.css
index 40fc17d..4ff0072 100644
--- a/static/index.css
+++ b/static/index.css
@@ -44,6 +44,9 @@ main {
     & > .panels {
         --right-width: 384px; /* Overridden by JavaScript */
 
+        box-sizing: border-box;
+        padding: 16px;
+
         display: grid;
         grid-template-columns: [left] 1fr [right-resize] auto [right] minmax(
                 0,
@@ -60,9 +63,9 @@ main {
         & > .left {
             display: flex;
             flex-direction: column;
-            padding: 16px;
 
             pointer-events: none;
+
             & > * {
                 pointer-events: auto;
             }
@@ -77,8 +80,8 @@ main {
             min-height: 0;
 
             display: grid;
-            grid-template-rows: 100%;
-            grid-template-columns: [resize] min-content [docked] auto;
+            grid-template-rows: minmax(0, min-content);
+            grid-template-columns: [floating] max-content [resize] min-content [docked] auto;
 
             padding-left: 16px;
 
@@ -89,14 +92,29 @@ main {
                 min-height: 0;
             }
 
+            & > rkgk-resize-handle {
+                pointer-events: auto;
+            }
+
+            & > .docked {
+                display: flex;
+                flex-direction: column;
+
+                & > * {
+                    pointer-events: auto;
+                }
+            }
+
+            & > .docked > rkgk-brush-editor {
+                max-height: 100%;
+            }
+
             & > .floating {
                 display: flex;
                 flex-direction: column;
 
                 gap: 12px;
 
-                padding: 16px;
-
                 & > rkgk-brush-preview {
                     width: 128px;
                     height: 128px;
@@ -108,35 +126,6 @@ main {
                     pointer-events: auto;
                 }
             }
-
-            & > rkgk-resize-handle {
-                pointer-events: auto;
-            }
-
-            & > .docked {
-                display: flex;
-                flex-direction: column;
-                height: 100%;
-                max-height: 100%;
-
-                background-color: var(--color-panel-background);
-                box-shadow: 0 0 0 1px var(--color-panel-border);
-
-                pointer-events: auto;
-
-                & > * {
-                    flex-shrink: 0;
-                }
-
-                & > rkgk-brush-editor {
-                    flex-grow: 1;
-                    flex-shrink: 1;
-                }
-
-                & > .menu-bar {
-                    border-bottom: 1px solid var(--color-panel-border);
-                }
-            }
         }
     }
 
@@ -159,7 +148,6 @@ main {
 
     & > #js-loading {
         background-color: var(--color-panel-background);
-        z-index: var(--z-modal);
 
         display: flex;
         align-items: center;
@@ -170,54 +158,47 @@ main {
 /* Resize handle */
 
 rkgk-resize-handle {
-    --width: 8px;
-    --line: none;
+    --width: 16px;
+    --line-width: 2px;
 
     display: flex;
     justify-content: center;
     flex-shrink: 0;
 
-    z-index: var(--z-resize-handle);
-
-    &.always-visible {
-        --line: 1px solid var(--color-panel-border);
-    }
-
     &[data-direction="horizontal"] {
         width: 100%;
         height: var(--width);
-        margin: calc(var(--width) / -2) 0;
-
         flex-direction: column;
 
         cursor: row-resize;
 
         & > .visual {
             width: 100%;
-            height: 0;
-            border-bottom: var(--line);
+            height: var(--line-width);
         }
     }
 
     &[data-direction="vertical"] {
         width: var(--width);
         height: 100%;
-        margin: 0 calc(var(--width) / -2);
-
         flex-direction: row;
 
         cursor: col-resize;
 
         & > .visual {
-            width: 0;
+            width: var(--line-width);
             height: 100%;
-            border-left: var(--line);
         }
     }
 
+    & > .visual {
+        background-color: var(--color-brand-blue);
+        opacity: 0%;
+    }
+
     &:hover > .visual,
     &.dragging > .visual {
-        --line: 2px solid var(--color-brand-blue);
+        opacity: 100%;
     }
 }
 
@@ -280,15 +261,12 @@ rkgk-reticle-cursor {
 
 /* Brush box */
 
-rkgk-brush-box {
+rkgk-brush-box.rkgk-panel {
     --button-size: 56px;
 
     height: var(--height);
     padding: 12px;
 
-    overflow-x: hidden;
-    overflow-y: auto;
-
     & > .brushes {
         display: grid;
         grid-template-columns: repeat(
@@ -297,6 +275,8 @@ rkgk-brush-box {
         );
 
         max-height: 100%;
+        overflow-x: hidden;
+        overflow-y: auto;
 
         & > button {
             padding: 0;
@@ -357,20 +337,20 @@ rkgk-brush-box {
 /* Code editor */
 
 rkgk-code-editor {
-    --gutter-width: 3.5em;
-    --vertical-padding: 12px;
+    --gutter-width: 2.75em;
 
     display: block;
     position: relative;
+    width: 100%;
 
-    padding: var(--vertical-padding) 0;
     overflow: auto;
 
     & > .layer {
         position: absolute;
         left: 0;
-        top: var(--vertical-padding);
+        top: 0;
         width: 100%;
+        height: 100%;
         box-sizing: border-box;
 
         margin: 0;
@@ -488,70 +468,58 @@ rkgk-code-editor {
 
     &:has(textarea:focus) {
         outline: 1px solid var(--color-brand-blue);
-        outline-offset: -1px;
+        outline-offset: 4px;
     }
 }
 
 /* Brush editor */
 
-rkgk-brush-editor {
+rkgk-brush-editor.rkgk-panel {
+    padding: 12px;
+
     display: flex;
     flex-direction: column;
-
-    min-height: 0;
+    gap: 4px;
 
     position: relative;
 
-    & > .editor {
-        display: flex;
-        flex-direction: column;
-
-        height: calc(100% - var(--brush-preview-height));
-
-        & > .name {
-            margin: 12px;
-            margin-bottom: 0;
-            font-weight: bold;
-        }
-
-        & > rkgk-code-editor {
-            height: 100%;
-            flex-shrink: 1;
-        }
+    & > .name {
+        margin-bottom: 4px;
+        font-weight: bold;
     }
 
-    & > output {
-        height: 64px;
-        flex-grow: 1;
+    & > .text-area {
+        display: block;
+        width: 100%;
+        margin: 0;
+        resize: none;
+        white-space: pre-wrap;
+        border: none;
+        overflow: hidden;
+        box-sizing: border-box;
+    }
+
+    & > .errors:empty,
+    & > .error-header:empty {
+        display: none;
+    }
+
+    & > .error-header {
+        margin: 0;
+        margin-top: 0.5em;
+        font-size: 1rem;
+        color: var(--color-error);
+    }
+
+    & > .errors {
+        margin: 0;
+        color: var(--color-error);
+        white-space: pre-wrap;
 
         user-select: text;
 
-        &[data-state="ok"] > .errors {
-            display: none;
-        }
-        &[data-state="error"] > .ok {
-            display: none;
-        }
-
-        & > .ok {
-            display: flex;
-            flex-direction: row;
-
-            height: 100%;
-
-            & > rkgk-brush-preview {
-                flex-grow: 1;
-            }
-        }
-
-        & > .errors {
-            margin: 0;
-            color: var(--color-error);
-            white-space: pre-wrap;
-
-            max-height: 20em;
-            overflow-y: auto;
-        }
+        max-height: 20em;
+        overflow-y: auto;
     }
 }
 
@@ -626,6 +594,7 @@ rkgk-brush-preview {
             var(--checkerboard-dark) 0% 50%
         )
         50% 50% / var(--checkerboard-size) var(--checkerboard-size);
+    border-radius: 4px;
 
     & > canvas {
         display: block;
@@ -656,20 +625,26 @@ rkgk-brush-preview {
 
 /* Brush cost gauges */
 
-rkgk-brush-cost-gauges {
+rkgk-brush-cost-gauges,
+rkgk-brush-cost-gauges.rkgk-panel {
     --gauge-size: 20px;
 
+    height: var(--gauge-size);
+    border-radius: 4px;
+
     display: flex;
     flex-direction: row;
 
+    overflow: clip; /* clip corners */
+
     &.hidden {
         display: none;
     }
 
     & > rkgk-brush-cost-gauge {
         display: block;
-        width: var(--gauge-size);
-        height: 100%;
+        height: var(--gauge-size);
+        flex-grow: 1;
 
         &.hidden {
             display: none;
@@ -679,7 +654,7 @@ rkgk-brush-cost-gauges {
             width: 100%;
             height: 100%;
 
-            clip-path: inset(calc(100% - var(--progress)) 0 0 0);
+            clip-path: xywh(0 0 var(--progress) 100%);
 
             background-color: var(--gauge-color);
         }
@@ -697,10 +672,6 @@ rkgk-brush-cost-gauges {
             --gauge-color: #5aca40;
         }
     }
-
-    & .icon {
-        background-position: 50% calc(100% - 4px);
-    }
 }
 
 /* Zoom indicator */
@@ -818,38 +789,21 @@ rkgk-context-menu.rkgk-panel {
 /* Menu bar */
 
 .menu-bar {
+    --border-radius: 4px;
+
     display: flex;
     align-items: center;
     box-sizing: border-box;
 
-    width: 100%;
-    height: 28px;
+    width: fit-content;
+    height: 24px;
+    border-radius: var(--border-radius);
 
-    margin: 0;
-    padding: 0;
-    list-style: none;
-
-    & > li {
-        display: flex;
-        flex-direction: row;
-        align-items: center;
-        height: 100%;
-    }
-
-    & > li.icon {
+    & > a {
         display: block;
-        width: 28px;
-        height: 28px;
-    }
-
-    & > li > a {
-        display: flex;
-        flex-direction: row;
-        align-items: center;
 
         color: var(--color-text);
-        height: 100%;
-        padding: 0 8px;
+        padding: 4px 8px;
         text-decoration: none;
 
         line-height: 1;
@@ -862,6 +816,16 @@ rkgk-context-menu.rkgk-panel {
             width: 24px;
             height: 24px;
         }
+
+        &:first-child {
+            border-top-left-radius: var(--border-radius);
+            border-bottom-left-radius: var(--border-radius);
+        }
+
+        &:last-child {
+            border-top-right-radius: var(--border-radius);
+            border-bottom-right-radius: var(--border-radius);
+        }
     }
 
     & > hr {
diff --git a/static/index.js b/static/index.js
index 3bcb378..4fb9f78 100644
--- a/static/index.js
+++ b/static/index.js
@@ -18,6 +18,8 @@ let canvasRenderer = main.querySelector("rkgk-canvas-renderer");
 let reticleRenderer = main.querySelector("rkgk-reticle-renderer");
 let brushBox = main.querySelector("rkgk-brush-box");
 let brushEditor = main.querySelector("rkgk-brush-editor");
+let brushPreview = main.querySelector("rkgk-brush-preview");
+let brushCostGauges = main.querySelector("rkgk-brush-cost-gauges");
 let zoomIndicator = main.querySelector("rkgk-zoom-indicator");
 let welcome = main.querySelector("rkgk-welcome");
 let connectionStatus = main.querySelector("rkgk-connection-status");
@@ -251,7 +253,7 @@ function readUrl(urlString) {
         let result = await currentUser.haku.evalBrush(
             selfController(interactionQueue, wall, event),
         );
-        brushEditor.renderHakuResult(result);
+        brushEditor.renderHakuResult(result.phase == "eval" ? "Evaluation" : "Rendering", result);
     });
 
     canvasRenderer.addEventListener(".viewportUpdate", () => reticleRenderer.render());
@@ -261,19 +263,26 @@ function readUrl(urlString) {
 
     // Brush editor
 
-    function updateBrushPreview() {
-        brushEditor.updatePreview(currentUser.haku, {
-            getStats: () => currentUser.getStats(session.wallInfo),
-        });
-    }
-
     function compileBrush() {
         let compileResult = currentUser.setBrush(brushEditor.code);
-        brushEditor.renderHakuResult(compileResult);
+        brushEditor.renderHakuResult("Compilation", compileResult);
 
-        if (compileResult.status == "ok") {
-            updateBrushPreview();
+        brushCostGauges.update(currentUser.getStats(session.wallInfo));
+
+        if (compileResult.status != "ok") {
+            brushPreview.setErrorFlag();
+            return;
         }
+
+        brushPreview.renderBrush(currentUser.haku).then((previewResult) => {
+            brushCostGauges.update(currentUser.getStats(session.wallInfo));
+            if (previewResult.status == "error") {
+                brushEditor.renderHakuResult(
+                    previewResult.phase == "eval" ? "Evaluation" : "Rendering",
+                    previewResult.result,
+                );
+            }
+        });
     }
 
     compileBrush();
@@ -285,8 +294,6 @@ function readUrl(urlString) {
         });
     });
 
-    brushEditor.brushPreview.addEventListener(".pixmapLost", updateBrushPreview);
-
     // Brush box
 
     function updateBrushBoxDirtyState() {
diff --git a/static/resize-handle.js b/static/resize-handle.js
index 9a15fda..b441be5 100644
--- a/static/resize-handle.js
+++ b/static/resize-handle.js
@@ -3,31 +3,13 @@ import { listen, SaveData } from "rkgk/framework.js";
 export class ResizeHandle extends HTMLElement {
     saveData = new SaveData("resizeHandle");
 
-    constructor(props) {
-        super();
-        this.props = props;
-    }
-
     connectedCallback() {
-        let props = this.props ?? this.dataset;
-
-        this.direction = this.dataset.direction = props.direction;
-        this.targetProperty = props.targetProperty;
-        this.initSize = parseInt(props.initSize);
-        this.minSize = parseInt(props.minSize);
-        this.inverse = props.inverse != null;
-
-        if (props.targetElement != null) {
-            // In case you want to construct the resize handle programatically:
-            // pass in the target element via targetElement.
-            // Don't forget to set its id.
-            this.target = props.targetElement;
-            this.targetId = this.target.id;
-        } else {
-            // Else use data-target.
-            this.targetId = props.target;
-            this.target = document.getElementById(this.targetId);
-        }
+        this.direction = this.getAttribute("data-direction");
+        this.targetId = this.getAttribute("data-target");
+        this.target = document.getElementById(this.targetId);
+        this.targetProperty = this.getAttribute("data-target-property");
+        this.initSize = parseInt(this.getAttribute("data-init-size"));
+        this.minSize = parseInt(this.getAttribute("data-min-size"));
 
         this.saveData.elementId = this.targetId;
 
@@ -76,10 +58,8 @@ export class ResizeHandle extends HTMLElement {
                     if (event.type == "mousemove") {
                         let delta =
                             this.direction == "vertical"
-                                ? event.clientX - mouseDown.clientX
+                                ? mouseDown.clientX - event.clientX
                                 : event.clientY - mouseDown.clientY;
-                        if (this.inverse) delta = -delta;
-
                         this.#setSize(startingSize + delta);
                         this.#updateTargetProperty();
                     } else if (event.type == "mouseup") {
diff --git a/template/index.hbs.html b/template/index.hbs.html
index 9ff2603..fa55672 100644
--- a/template/index.hbs.html
+++ b/template/index.hbs.html
@@ -7,6 +7,8 @@
         <title>rakugaki</title>
 
         <link rel="stylesheet" href="{{ static 'base.css' }}">
+        <link rel="stylesheet" href="{{ static 'fonts.css' }}">
+        <link rel="stylesheet" href="{{ static 'index.css' }}">
 
         <meta name="viewport" content="width=device-width, initial-scale=1">
 
@@ -25,20 +27,13 @@
             import "rkgk/brush-editor.js";
             import "rkgk/brush-preview.js";
             import "rkgk/canvas-renderer.js";
-            import "rkgk/code-editor.js";
             import "rkgk/connection-status.js";
-            import "rkgk/context-menu.js";
             import "rkgk/framework.js";
-            import "rkgk/haku.js";
-            import "rkgk/online-users.js";
-            import "rkgk/painter.js";
-            import "rkgk/random.js";
             import "rkgk/resize-handle.js";
             import "rkgk/reticle-renderer.js";
             import "rkgk/session.js";
             import "rkgk/throbber.js";
             import "rkgk/viewport.js";
-            import "rkgk/wall.js";
             import "rkgk/welcome.js";
             import "rkgk/zoom-indicator.js";
     
@@ -60,45 +55,44 @@
     </head>
 
     <body>
-        <!-- We shouldn't consider these stylesheets render-blocking.
-             About the only render-blocking thing on the page is the throbber. -->
-        <link rel="stylesheet" href="{{ static 'fonts.css' }}">
-        <link rel="stylesheet" href="{{ static 'index.css' }}">
-
         <main>
             <rkgk-canvas-renderer class="fullscreen"></rkgk-canvas-renderer>
             <rkgk-reticle-renderer class="fullscreen"></rkgk-reticle-renderer>
             <div class="panels fullscreen" id="panels-overlay">
                 <div class="left">
+                    <div class="rkgk-panel menu-bar">
+                        <a class="icon icon-rkgk-grayscale" title="I know this menu bar is really ugly. Sorry about that."></a>
+                        <hr>
+                        <a href="/docs/rkgk.html">Manual</a>
+                    </div>
+
                     <rkgk-zoom-indicator class="rkgk-panel"></rkgk-zoom-indicator>
                 </div>
 
                 <div class="right">
+                    <div class="floating">
+                        <rkgk-brush-preview></rkgk-brush-preview>
+                        <rkgk-brush-cost-gauges class="rkgk-panel"></rkgk-brush-cost-gauges>
+                    </div>
                     <rkgk-resize-handle
                         data-direction="vertical"
-                        data-inverse
                         data-target="panels-overlay"
                         data-target-property="--right-width"
                         data-init-size="528"
-                        data-min-size="256"></rkgk-resize-handle>
+                        data-min-size="384"></rkgk-resize-handle>
                     <div class="docked">
-                        <menu class="menu-bar">
-                            <li class="icon icon-rkgk-grayscale"></li>
-                            <hr>
-                            <li><a href="/docs/rkgk.html">Manual</a></li>
-                        </menu>
-
-                        <rkgk-brush-box id="brush-box"></rkgk-brush-box>
-
+                        <rkgk-brush-box
+                            id="brush-box"
+                            data-storage-id="brush-box"></rkgk-brush-box>
                         <rkgk-resize-handle
-                            class="always-visible"
                             data-direction="horizontal"
                             data-target="brush-box"
                             data-target-property="--height"
                             data-init-size="168"
                             data-min-size="96"></rkgk-resize-handle>
 
-                        <rkgk-brush-editor id="brush-editor"></rkgk-brush-editor>
+                        <rkgk-brush-editor
+                            data-storage-id="brush-editor"></rkgk-brush-editor>
                     </div>
                 </div>
             </div>