diff --git a/tests/vendor/concept-css.test.mjs b/tests/vendor/concept-css.test.mjs
new file mode 100644
index 0000000..6697ff4
--- /dev/null
+++ b/tests/vendor/concept-css.test.mjs
@@ -0,0 +1,83 @@
+import assert from 'node:assert/strict';
+import { createHash } from 'node:crypto';
+import { spawnSync } from 'node:child_process';
+import { existsSync, mkdtempSync, mkdirSync, readFileSync, readdirSync, rmSync, writeFileSync, copyFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join, dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import test from 'node:test';
+import { lintOverlay } from '../../tools/vendor/sync-concept-css.mjs';
+
+const root = join(dirname(fileURLToPath(import.meta.url)), '../..');
+const script = join(root, 'tools/vendor/sync-concept-css.mjs');
+const concept = join(root, 'docs/concepts/workspace/style.css');
+const copy = join(root, 'web/js/workspace/concept.css');
+const sha = path => createHash('sha256').update(readFileSync(path)).digest('hex');
+
+function walk(dir) {
+    return readdirSync(dir, { withFileTypes: true }).flatMap(entry => {
+        const path = join(dir, entry.name);
+        return entry.isDirectory() ? walk(path) : [path];
+    });
+}
+
+test('concept copy is byte-identical', () => {
+    assert.ok(existsSync(copy), 'web/js/workspace/concept.css is missing; run sync-concept-css.mjs --write');
+    assert.equal(sha(copy), sha(concept));
+    const result = spawnSync(process.execPath, [script, '--check'], { cwd: root, encoding: 'utf8' });
+    assert.equal(result.status, 0, result.stderr);
+});
+
+test('check fails on a one-byte drift', () => {
+    const temp = mkdtempSync(join(tmpdir(), 'concept-css-'));
+    try {
+        mkdirSync(join(temp, 'docs/concepts/workspace'), { recursive: true });
+        mkdirSync(join(temp, 'web/js/workspace'), { recursive: true });
+        copyFileSync(concept, join(temp, 'docs/concepts/workspace/style.css'));
+        writeFileSync(join(temp, 'web/js/workspace/concept.css'), Buffer.concat([readFileSync(concept), Buffer.from(' ')]));
+        const run = () => spawnSync(process.execPath, [script, '--check', '--root', temp], { encoding: 'utf8' });
+        const drifted = run();
+        assert.equal(drifted.status, 1);
+        assert.match(drifted.stderr, /drift/i);
+        assert.equal(spawnSync(process.execPath, [script, '--write', '--root', temp]).status, 0);
+        assert.equal(run().status, 0);
+    } finally { rmSync(temp, { recursive: true, force: true }); }
+});
+
+test('overlay lint requires a decision marker on concept selectors', () => {
+    const conceptCss = '.card, .row { color: red; }\n@media (max-width: 700px) { .card .title { margin: 0; } }\n';
+    assert.deepEqual(lintOverlay(conceptCss, '.error-row { color: red; }').violations, []);
+    assert.equal(lintOverlay(conceptCss, '.x, .card { color: blue; }').violations.length, 1);
+    assert.equal(lintOverlay(conceptCss, '@media (max-width: 700px) { .card .title { margin: 1px; } }').violations.length, 1);
+    assert.deepEqual(lintOverlay(conceptCss, '/* D12 */\n.card { color: blue; }').violations, []);
+    assert.deepEqual(lintOverlay(conceptCss, '.card { /* D3 */ color: blue; }').violations, []);
+    assert.equal(lintOverlay(conceptCss, '/* tweak */ .card { color: blue; }').violations.length, 1);
+    assert.equal(lintOverlay(conceptCss, '/* D1 */ .card { color: blue; }\n.row { gap: 1px; }').violations.length, 1);
+});
+
+test('overlay rules on concept selectors carry a decision marker', () => {
+    const overlay = join(root, 'web/js/workspace/workspace.css');
+    if (!existsSync(overlay)) return;
+    const { violations } = lintOverlay(readFileSync(concept, 'utf8'), readFileSync(overlay, 'utf8'));
+    assert.deepEqual(violations, []);
+});
+
+test('only workspace.html loads workspace CSS', () => {
+    const offenders = walk(join(root, 'web'))
+        .filter(path => /\.(html|js|mjs)$/.test(path) && !path.includes('/lib/') && !path.includes('/shared/'))
+        .filter(path => /\b(concept|workspace)\.css\b/.test(readFileSync(path, 'utf8')))
+        .map(path => path.slice(root.length + 1));
+    assert.ok(offenders.every(path => path === 'web/workspace.html'), `unexpected consumers: ${offenders.join(', ')}`);
+});
+
+// Turned on by Task A2, which rewrites workspace.html to the concept order.
+test('workspace.html loads controls, viewer, concept, overlay in order', { todo: 'Task A2 rewrites workspace.html' }, () => {
+    const html = readFileSync(join(root, 'web/workspace.html'), 'utf8');
+    const hrefs = [...html.matchAll(/<link[^>]+rel="stylesheet"[^>]+href="([^"]+)"/g)].map(match => match[1]);
+    assert.deepEqual(hrefs, [
+        'js/shared/toolkit/controls.css',
+        'lib/viewerjs/viewer.min.css',
+        'js/workspace/concept.css',
+        'js/workspace/workspace.css',
+    ]);
+});
diff --git a/tools/vendor/package.json b/tools/vendor/package.json
index 29aa97f..0fda145 100644
--- a/tools/vendor/package.json
+++ b/tools/vendor/package.json
@@ -5,7 +5,8 @@
   "description": "Maintainer-only tools for reproducible browser dependencies",
   "scripts": {
     "sync": "node vendor-viewerjs.mjs",
-    "check": "node vendor-viewerjs.mjs --check && node vendor-toolkit.mjs --check",
+    "check": "node vendor-viewerjs.mjs --check && node vendor-toolkit.mjs --check && node sync-concept-css.mjs --check",
+    "sync:concept": "node sync-concept-css.mjs --write",
     "sync:toolkit": "node vendor-toolkit.mjs",
     "update": "node update-viewerjs.mjs",
     "test": "node --test ../../tests/vendor/*.test.mjs",
diff --git a/tools/vendor/sync-concept-css.mjs b/tools/vendor/sync-concept-css.mjs
new file mode 100644
index 0000000..0592c29
--- /dev/null
+++ b/tools/vendor/sync-concept-css.mjs
@@ -0,0 +1,123 @@
+import { readFileSync, writeFileSync, mkdirSync } from 'node:fs';
+import { join, resolve } from 'node:path';
+import { pathToFileURL } from 'node:url';
+import { repositoryRoot } from './vendor-viewerjs.mjs';
+
+const CONCEPT = 'docs/concepts/workspace/style.css';
+const COPY = 'web/js/workspace/concept.css';
+const MARKER = /\/\*[^*]*\bD\d+\b[^*]*\*\//;
+
+// Minimal tokenizer: walks top-level rules and the bodies of @media/@supports,
+// returning each rule's normalized selectors and the comments attached to it
+// (those before its selector and those inside its block).
+function parseRules(css) {
+    const rules = [];
+    let index = 0;
+    const length = css.length;
+    function readBlock(start) {
+        let depth = 0;
+        let cursor = start;
+        for (; cursor < length; cursor += 1) {
+            if (css.startsWith('/*', cursor)) { cursor = commentEnd(cursor) - 1; continue; }
+            const char = css[cursor];
+            if (char === '"' || char === "'") { cursor = stringEnd(cursor) - 1; continue; }
+            if (char === '{') depth += 1;
+            else if (char === '}') { depth -= 1; if (depth === 0) return cursor; }
+        }
+        return length - 1;
+    }
+    function commentEnd(at) { const end = css.indexOf('*/', at + 2); return end === -1 ? length : end + 2; }
+    function stringEnd(at) {
+        for (let cursor = at + 1; cursor < length; cursor += 1) {
+            if (css[cursor] === '\\') cursor += 1;
+            else if (css[cursor] === css[at]) return cursor + 1;
+        }
+        return length;
+    }
+    function walk(from, to) {
+        let cursor = from;
+        let comments = [];
+        let prelude = '';
+        while (cursor < to) {
+            if (css.startsWith('/*', cursor)) {
+                const end = commentEnd(cursor);
+                comments.push(css.slice(cursor, end));
+                cursor = end;
+                continue;
+            }
+            const char = css[cursor];
+            if (char === ';') { prelude = ''; comments = []; cursor += 1; continue; }
+            if (char === '{') {
+                const close = readBlock(cursor);
+                const head = prelude.trim();
+                const body = css.slice(cursor + 1, close);
+                if (/^@(media|supports|layer)\b/i.test(head)) walk(cursor + 1, close);
+                else if (!head.startsWith('@')) {
+                    rules.push({ selectors: splitSelectors(head), comments: [...comments, ...(body.match(/\/\*[\s\S]*?\*\//g) ?? [])] });
+                }
+                prelude = ''; comments = []; cursor = close + 1;
+                continue;
+            }
+            prelude += char;
+            cursor += 1;
+        }
+    }
+    walk(index, length);
+    return rules;
+}
+
+function splitSelectors(head) {
+    const out = [];
+    let depth = 0;
+    let current = '';
+    for (const char of head) {
+        if (char === '(' || char === '[') depth += 1;
+        else if (char === ')' || char === ']') depth -= 1;
+        if (char === ',' && depth === 0) { out.push(current); current = ''; } else current += char;
+    }
+    out.push(current);
+    return out.map(selector => selector.replace(/\s+/g, ' ').trim()).filter(Boolean);
+}
+
+export function lintOverlay(conceptCss, overlayCss) {
+    const owned = new Set(parseRules(conceptCss).flatMap(rule => rule.selectors));
+    const violations = [];
+    for (const rule of parseRules(overlayCss)) {
+        const shared = rule.selectors.filter(selector => owned.has(selector));
+        if (shared.length && !rule.comments.some(comment => MARKER.test(comment))) {
+            violations.push(`${shared.join(', ')}: overlay rule on a concept selector needs a /* D<n> */ decision marker`);
+        }
+    }
+    return { violations };
+}
+
+export function syncConceptCss({ root = repositoryRoot, check = false } = {}) {
+    const source = readFileSync(join(root, CONCEPT));
+    const target = join(root, COPY);
+    if (check) {
+        let current = null;
+        try { current = readFileSync(target); } catch (error) { if (error.code !== 'ENOENT') throw error; }
+        if (!current) throw new Error(`Concept stylesheet drift: ${COPY} is missing; run sync-concept-css.mjs --write`);
+        if (!current.equals(source)) {
+            let offset = 0;
+            while (offset < source.length && offset < current.length && source[offset] === current[offset]) offset += 1;
+            throw new Error(`Concept stylesheet drift: ${COPY} (${current.length} bytes) differs from ${CONCEPT} (${source.length} bytes) at byte ${offset}; run sync-concept-css.mjs --write`);
+        }
+    } else {
+        mkdirSync(join(root, 'web/js/workspace'), { recursive: true });
+        writeFileSync(target, source);
+    }
+    return source.length;
+}
+
+if (process.argv[1] && import.meta.url === pathToFileURL(resolve(process.argv[1])).href) {
+    try {
+        const args = process.argv.slice(2);
+        const rootAt = args.indexOf('--root');
+        const root = rootAt === -1 ? repositoryRoot : resolve(args[rootAt + 1]);
+        const mode = args.filter((arg, at) => arg.startsWith('--') && arg !== '--root' && !(rootAt !== -1 && at === rootAt + 1));
+        if (mode.length !== 1 || !['--write', '--check'].includes(mode[0])) throw new Error('Usage: sync-concept-css.mjs --write | --check [--root <dir>]');
+        const bytes = syncConceptCss({ root, check: mode[0] === '--check' });
+        console.log(`Concept stylesheet ${mode[0] === '--check' ? 'verified' : 'written'} (${bytes} bytes)`);
+    } catch (error) { console.error(error.message); process.exitCode = 1; }
+}
diff --git a/web/js/workspace/concept.css b/web/js/workspace/concept.css
new file mode 100644
index 0000000..db4b3c4
--- /dev/null
+++ b/web/js/workspace/concept.css
@@ -0,0 +1,1703 @@
+* {
+  box-sizing: border-box;
+}
+body {
+  margin: 0;
+  --bg-color: #191a1d;
+}
+body.ca-tools {
+  --page: #1b1c1f;
+  --sidebar: #202124;
+  --green: #73dda9;
+  --red: #ff8c98;
+  --warning: #e6bd78;
+  --soft-blue: #14364d;
+  --line: var(--ca-line);
+  background: var(--page);
+  font:
+    14px/1.5 Inter,
+    ui-sans-serif,
+    system-ui,
+    -apple-system,
+    sans-serif;
+  color: var(--ca-text);
+}
+body[data-ca-theme="light"] {
+  --page: #f3f4f6;
+  --sidebar: #fff;
+  --green: #176b46;
+  --red: #b71931;
+  --warning: #815514;
+  --soft-blue: #e4f1fb;
+}
+button,
+input,
+select,
+textarea,
+a {
+  touch-action: manipulation;
+}
+a {
+  color: var(--ca-focus);
+  text-decoration: none;
+}
+button:focus-visible,
+a:focus-visible,
+input:focus-visible,
+select:focus-visible,
+summary:focus-visible,
+textarea:focus-visible {
+  outline: 2px solid var(--ca-focus);
+  outline-offset: 3px;
+}
+[hidden] {
+  display: none !important;
+}
+.skip {
+  position: fixed;
+  top: 10px;
+  left: 10px;
+  z-index: 10;
+  clip-path: inset(50%);
+  width: 1px;
+  height: 1px;
+  overflow: hidden;
+}
+.skip:focus {
+  clip-path: none;
+  width: auto;
+  height: auto;
+  padding: 12px;
+  background: var(--ca-surface);
+}
+h1,
+h2,
+h3,
+p {
+  margin: 0;
+}
+h1 {
+  font-size: 28px;
+  line-height: 1.3;
+  font-weight: 620;
+  letter-spacing: -0.7px;
+}
+h2 {
+  font-size: 17px;
+  font-weight: 600;
+}
+h3 {
+  font-size: 14px;
+  font-weight: 600;
+}
+p + p {
+  margin-top: 10px;
+}
+.muted,
+.small {
+  color: var(--ca-muted);
+}
+.small {
+  font-size: 12px;
+}
+.eyebrow,
+.sidebar-label {
+  font-size: 10px;
+  font-weight: 650;
+  letter-spacing: 1.1px;
+  color: var(--ca-muted);
+}
+.app-shell {
+  display: grid;
+  grid-template-columns: 218px minmax(0, 1fr);
+  min-height: 100dvh;
+}
+.sidebar {
+  background: var(--sidebar);
+  border-inline-end: 1px solid var(--line);
+  padding: 26px 14px 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 5px;
+  position: sticky;
+  top: 0;
+  height: 100dvh;
+  overflow-y: auto;
+}
+.brand {
+  display: flex;
+  gap: 11px;
+  align-items: center;
+  color: var(--ca-text);
+  font-size: 14px;
+  font-weight: 650;
+  margin: 0 4px 28px;
+  line-height: 1.3;
+}
+.brand small {
+  display: block;
+  font-size: 9px;
+  letter-spacing: 1.8px;
+  color: var(--ca-muted);
+  margin-top: 6px;
+}
+.brand-mark {
+  width: 34px;
+  height: 36px;
+  color: var(--ca-focus);
+  font-size: 29px;
+  position: relative;
+}
+.brand-mark > span {
+  font-size: 15px;
+  position: absolute;
+  bottom: -2px;
+  right: -2px;
+}
+.sidebar-label {
+  margin: 14px 12px 6px;
+  font-size: 9px;
+  display: flex;
+  gap: 6px;
+  align-items: center;
+}
+.new-label {
+  font-size: 7px;
+  letter-spacing: 0.4px;
+  opacity: 0.7;
+}
+.sidebar nav {
+  display: grid;
+  gap: 3px;
+}
+.sidebar nav a {
+  display: flex;
+  align-items: center;
+  gap: 11px;
+  min-height: 38px;
+  padding: 8px 12px;
+  border-radius: 6px;
+  color: var(--ca-muted);
+  font-size: 12px;
+}
+.sidebar nav a:hover {
+  background: var(--ca-field);
+  color: var(--ca-text);
+}
+.sidebar nav a[aria-current="page"] {
+  color: var(--ca-focus);
+  background: var(--soft-blue);
+}
+.sidebar nav .nav-count {
+  margin-inline-start: auto;
+  color: var(--ca-muted);
+  font-size: 10px;
+}
+.sidebar-bottom {
+  margin-top: auto;
+  padding-top: 32px;
+}
+.connection {
+  border-top: 1px solid var(--line);
+  margin: 17px 6px 0;
+  padding-top: 17px;
+  display: flex;
+  gap: 8px;
+  font-size: 10px;
+  align-items: flex-start;
+}
+.connection i {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--green);
+  margin-top: 5px;
+}
+.connection small {
+  display: block;
+  font-size: 8px;
+  color: var(--ca-muted);
+  margin-top: 4px;
+}
+.workspace {
+  min-width: 0;
+}
+.topbar {
+  height: 68px;
+  padding: 0 30px;
+  border-bottom: 1px solid var(--line);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 16px;
+}
+.breadcrumbs {
+  display: flex;
+  gap: 12px;
+  font-size: 12px;
+  color: var(--ca-muted);
+}
+.breadcrumbs span:last-child {
+  color: var(--ca-text);
+}
+.top-actions {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+.ca-tools .top-actions button,
+.ca-tools .top-actions select {
+  font-size: 11px;
+}
+.theme-label {
+  display: flex;
+  align-items: center;
+  gap: 7px;
+  font-size: 11px;
+  color: var(--ca-muted);
+}
+.concept-badge {
+  color: var(--ca-focus);
+  border: 1px solid var(--ca-accent);
+  border-radius: 4px;
+  padding: 3px 7px;
+  font-size: 9px;
+  letter-spacing: 0.4px;
+}
+.count {
+  background: var(--ca-field);
+  border-radius: 4px;
+  padding: 1px 5px;
+  font-size: 10px;
+  margin-left: 4px;
+}
+.canvas-link {
+  font-size: 12px;
+  white-space: nowrap;
+}
+main {
+  padding: 30px;
+  max-width: 1900px;
+  margin: auto;
+}
+.heading {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 16px;
+  margin-bottom: 22px;
+}
+.heading .muted {
+  font-size: 12px;
+  margin-top: 6px;
+}
+.heading-actions,
+.row-actions {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  flex-wrap: wrap;
+}
+.ca-tools button {
+  min-height: 32px;
+  font-size: 12px;
+}
+.icon {
+  width: 17px;
+  height: 17px;
+  flex-shrink: 0;
+  display: inline-block;
+  vertical-align: middle;
+}
+.icon-btn {
+  padding: 6px !important;
+  min-width: 32px;
+  display: inline-grid !important;
+  place-items: center;
+}
+.ca-tools button.send {
+  color: var(--ca-focus);
+  border-color: var(--line);
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+}
+.ca-tools button.send.ca-primary {
+  color: #fff;
+  border-color: var(--ca-accent);
+}
+.toolbar {
+  display: flex;
+  gap: 10px;
+  align-items: center;
+  flex-wrap: wrap;
+  margin-bottom: 18px;
+}
+.search-field {
+  flex: 1;
+  min-width: 180px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  background: var(--ca-field);
+  border: 1px solid var(--line);
+  border-radius: 5px;
+  padding-inline: 10px;
+}
+.search-field input {
+  width: 100%;
+  border: 0 !important;
+  background: transparent !important;
+  min-height: 36px;
+  font-size: 12px !important;
+}
+.toolbar select {
+  font-size: 11px;
+  min-height: 36px;
+}
+.segmented {
+  display: inline-flex;
+  background: var(--ca-field);
+  border: 1px solid var(--line);
+  border-radius: 5px;
+  padding: 3px;
+  gap: 2px;
+}
+.ca-tools .segmented button {
+  background: transparent;
+  border: 0;
+  font-size: 11px;
+  min-height: 27px;
+  padding: 4px 10px;
+}
+.ca-tools .segmented button[aria-pressed="true"] {
+  background: var(--ca-accent);
+  color: #fff;
+}
+.filter-row {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-wrap: wrap;
+  margin-bottom: 22px;
+}
+.chip {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 3px 8px;
+  border: 1px solid var(--line);
+  border-radius: 4px;
+  font-size: 10px;
+  color: var(--ca-muted);
+  background: var(--ca-field);
+}
+button.chip {
+  min-height: 27px !important;
+}
+.chip.green {
+  color: var(--green);
+}
+.chip.red {
+  color: var(--red);
+}
+.chip.blue {
+  color: var(--ca-focus);
+}
+.gallery-layout {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 310px;
+  gap: 22px;
+  align-items: start;
+}
+.gallery-body {
+  min-width: 0;
+}
+.section-caption {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  font-size: 11px;
+  color: var(--ca-muted);
+  margin-bottom: 12px;
+}
+.image-grid {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 13px;
+}
+.image-grid.large {
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+}
+.image-grid.compact {
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+}
+.media-card {
+  background: var(--ca-surface);
+  border: 1px solid var(--line);
+  border-radius: 7px;
+  overflow: hidden;
+  min-width: 0;
+}
+.media-card.selected {
+  border-color: var(--ca-focus);
+  box-shadow: 0 0 0 1px var(--ca-focus);
+}
+.media-art {
+  position: relative;
+}
+.ca-tools .image-open {
+  display: block;
+  padding: 0;
+  border: 0;
+  border-radius: 0;
+  width: 100%;
+  background: var(--ca-field);
+  overflow: hidden;
+  min-height: 0;
+}
+.image-open img {
+  display: block;
+  width: 100%;
+  height: auto;
+  aspect-ratio: 1.33;
+  object-fit: cover;
+  transition: transform 0.2s;
+}
+.image-open:hover img {
+  transform: scale(1.03);
+}
+.image-overlays {
+  position: absolute;
+  inset: 9px 9px auto;
+  display: flex;
+  justify-content: space-between;
+  pointer-events: none;
+}
+.image-overlays > label,
+.image-overlays > button {
+  pointer-events: auto;
+}
+.image-overlays input {
+  width: 15px;
+  height: 15px;
+  accent-color: var(--ca-accent);
+}
+.ca-tools .star-button {
+  min-height: 25px;
+  width: 27px;
+  padding: 2px;
+  background: #131c28bb;
+  color: #fff;
+  border: 1px solid #ffffff33;
+}
+.star-button[aria-pressed="true"] {
+  color: #f1cc84 !important;
+}
+.media-info {
+  padding: 10px 11px;
+  display: flex;
+  justify-content: space-between;
+  gap: 8px;
+  align-items: center;
+}
+.media-info h3 {
+  font-size: 11px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.media-info p {
+  font-size: 9px;
+  color: var(--ca-muted);
+  margin-top: 4px;
+}
+.media-info > div {
+  min-width: 0;
+}
+.ca-tools .media-info button {
+  min-height: 26px;
+  min-width: 28px;
+  padding: 4px;
+}
+.detail-panel {
+  background: var(--ca-surface);
+  border: 1px solid var(--line);
+  border-radius: 7px;
+  overflow: hidden;
+  position: sticky;
+  top: 20px;
+}
+.detail-cover {
+  width: 100%;
+  height: 150px;
+  object-fit: cover;
+  display: block;
+}
+.detail-inner {
+  padding: 17px;
+}
+.panel-heading {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  margin-bottom: 12px;
+}
+.panel-heading h2 {
+  font-size: 14px;
+}
+.prompt-section {
+  border-top: 1px solid var(--line);
+  padding-top: 15px;
+  margin-top: 15px;
+}
+.prompt-heading {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  margin-bottom: 8px;
+}
+.prompt-heading .role-label {
+  font-size: 10px;
+  letter-spacing: 0.7px;
+  text-transform: uppercase;
+  font-weight: 650;
+  color: var(--green);
+}
+.prompt-section.negative .role-label {
+  color: var(--red);
+}
+.prompt-text {
+  font-size: 12px;
+  line-height: 1.75;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+  margin: 0;
+}
+.prompt-actions {
+  display: flex;
+  align-items: center;
+  gap: 5px;
+}
+.ca-tools .prompt-actions button {
+  min-height: 27px;
+  min-width: 28px;
+  padding: 4px;
+}
+.meta-grid {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 12px;
+  margin: 16px 0;
+  font-size: 11px;
+}
+.meta-grid dt {
+  color: var(--ca-muted);
+  font-size: 10px;
+}
+.meta-grid dd {
+  margin: 3px 0 0;
+}
+.tags {
+  display: flex;
+  gap: 5px;
+  flex-wrap: wrap;
+  margin-top: 12px;
+}
+.detail-footer {
+  border-top: 1px solid var(--line);
+  padding: 13px 17px;
+  display: flex;
+  gap: 8px;
+  flex-wrap: wrap;
+}
+.ca-tools .fullwidth {
+  width: 100%;
+  justify-content: center;
+}
+.app-footer {
+  padding: 22px 30px;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 12px;
+  font-size: 10px;
+  color: var(--ca-muted);
+}
+.ca-tools .app-footer button {
+  font-size: 10px;
+  background: none;
+  border: 0;
+  padding: 0;
+  color: var(--ca-focus);
+}
+.bulkbar {
+  display: flex;
+  align-items: center;
+  gap: 9px;
+  padding: 10px 13px;
+  background: var(--soft-blue);
+  border: 1px solid var(--ca-accent);
+  border-radius: 6px;
+  margin-bottom: 16px;
+  flex-wrap: wrap;
+  font-size: 12px;
+}
+.library-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 18px;
+}
+.prompt-card {
+  border: 1px solid var(--line);
+  background: var(--ca-surface);
+  border-radius: 8px;
+  overflow: hidden;
+}
+.prompt-card .card-art {
+  display: grid;
+  grid-template-columns: 2fr 1fr;
+  height: 170px;
+  gap: 3px;
+  background: var(--ca-field);
+}
+.card-art img {
+  width: 100%;
+  height: 170px;
+  object-fit: cover;
+}
+.card-content {
+  padding: 18px;
+}
+.card-title {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+}
+.card-title button {
+  font-size: 16px !important;
+  font-weight: 600;
+  background: none !important;
+  border: 0 !important;
+  padding: 0 !important;
+  text-align: start;
+}
+.card-content .prompt-section {
+  margin-top: 10px;
+  padding-top: 10px;
+}
+.card-meta {
+  display: flex;
+  align-items: center;
+  gap: 9px;
+  margin: 14px 0 0;
+  font-size: 10px;
+  color: var(--ca-muted);
+}
+.card-footer {
+  padding: 11px 18px;
+  border-top: 1px solid var(--line);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  font-size: 10px;
+  color: var(--ca-muted);
+}
+.surface {
+  padding: 22px;
+  background: var(--ca-surface);
+  border: 1px solid var(--line);
+  border-radius: 7px;
+}
+.surface + .surface {
+  margin-top: 18px;
+}
+.surface > p {
+  font-size: 12px;
+  color: var(--ca-muted);
+  margin-top: 7px;
+}
+.stack {
+  display: grid;
+  gap: 18px;
+}
+.two-col {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 18px;
+}
+.section-nav {
+  display: flex;
+  gap: 6px;
+  flex-wrap: wrap;
+  border-bottom: 1px solid var(--line);
+  padding-bottom: 16px;
+  margin-bottom: 22px;
+}
+.section-nav button {
+  background: none !important;
+  border-color: transparent !important;
+  color: var(--ca-muted);
+}
+.section-nav button[aria-pressed="true"] {
+  background: var(--soft-blue) !important;
+  color: var(--ca-focus);
+  border-color: var(--ca-accent) !important;
+}
+.settings-layout {
+  max-width: 1000px;
+}
+.setting-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 24px;
+  padding: 17px 0;
+  border-top: 1px solid var(--line);
+}
+.setting-row:first-of-type {
+  margin-top: 15px;
+}
+.setting-row p {
+  font-size: 11px;
+  color: var(--ca-muted);
+  margin-top: 4px;
+  max-width: 540px;
+}
+.setting-row label {
+  font-size: 12px;
+  font-weight: 500;
+}
+.setting-row select,
+.setting-row input:not([type="checkbox"]):not([type="range"]) {
+  max-width: 230px;
+  min-width: 130px;
+  font-size: 12px;
+}
+.setting-row input[type="range"] {
+  max-width: 180px;
+  accent-color: var(--ca-accent);
+}
+.setting-row input[type="checkbox"] {
+  accent-color: var(--ca-accent);
+  width: 17px;
+  height: 17px;
+}
+.save-row {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-top: 22px;
+  gap: 16px;
+}
+.notice {
+  border: 1px solid var(--ca-accent);
+  background: var(--soft-blue);
+  border-radius: 6px;
+  padding: 15px 18px;
+  margin-bottom: 22px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 18px;
+}
+.notice p {
+  font-size: 12px;
+  color: var(--ca-muted);
+  margin-top: 4px;
+}
+.notice .row-actions {
+  flex-shrink: 0;
+}
+.summary-metrics {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 14px;
+  margin: 0 0 22px;
+}
+.metric {
+  padding: 18px;
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: var(--ca-surface);
+}
+.metric strong {
+  font-size: 23px;
+  font-weight: 600;
+  display: block;
+  margin-bottom: 3px;
+}
+.metric span {
+  font-size: 11px;
+  color: var(--ca-muted);
+}
+.operation-list {
+  margin-top: 15px;
+}
+.operation {
+  display: flex;
+  justify-content: space-between;
+  gap: 18px;
+  align-items: center;
+  padding: 15px 0;
+  border-top: 1px solid var(--line);
+}
+.operation h3 {
+  font-size: 12px;
+}
+.operation p {
+  font-size: 11px;
+  color: var(--ca-muted);
+  margin-top: 5px;
+}
+.operation .row-actions {
+  flex-shrink: 0;
+}
+.ca-tools .danger {
+  color: var(--red);
+  border-color: var(--red);
+}
+.warning-note {
+  font-size: 11px;
+  color: var(--warning);
+  margin: 13px 0;
+}
+.table-wrap {
+  overflow-x: auto;
+}
+table {
+  border-collapse: collapse;
+  width: 100%;
+  font-size: 12px;
+}
+caption {
+  text-align: start;
+  font-size: 13px;
+  font-weight: 600;
+  margin: 0 0 15px;
+}
+th,
+td {
+  text-align: start;
+  border-bottom: 1px solid var(--line);
+  padding: 13px 10px;
+}
+th {
+  color: var(--ca-muted);
+  font-size: 10px;
+  font-weight: 500;
+}
+td .row-actions {
+  justify-content: flex-end;
+}
+pre {
+  background: var(--ca-field);
+  padding: 15px;
+  border: 1px solid var(--line);
+  border-radius: 5px;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+  font-size: 11px;
+  max-height: 350px;
+  overflow: auto;
+}
+details {
+  border-top: 1px solid var(--line);
+  margin-top: 16px;
+  padding-top: 13px;
+}
+summary {
+  cursor: pointer;
+  font-size: 12px;
+}
+.ca-tools dialog {
+  color: var(--ca-text);
+  background: var(--ca-surface);
+  border: 1px solid var(--ca-border);
+  border-radius: 9px;
+  padding: 24px;
+  width: min(650px, calc(100vw - 24px));
+  max-height: 90dvh;
+  overflow: auto;
+}
+.ca-tools dialog::backdrop {
+  background: #080b12b8;
+}
+.dialog-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 18px;
+  margin-bottom: 20px;
+}
+.dialog-header h2 {
+  font-size: 18px;
+}
+.dialog-header > button {
+  font-size: 20px;
+  min-width: 32px;
+}
+.dialog-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 8px;
+  flex-wrap: wrap;
+  margin-top: 23px;
+}
+.field {
+  display: grid;
+  gap: 7px;
+  font-size: 12px;
+  margin: 15px 0;
+}
+.field input,
+.field textarea,
+.field select {
+  width: 100%;
+  font-size: 12px;
+}
+.field textarea {
+  min-height: 100px;
+  resize: vertical;
+}
+.demo-note {
+  padding: 10px 12px;
+  background: var(--soft-blue);
+  border: 1px solid var(--ca-accent);
+  border-radius: 5px;
+  color: var(--ca-focus);
+  font-size: 11px;
+  margin-bottom: 16px;
+}
+.send-preview {
+  border: 1px solid var(--line);
+  padding: 13px;
+  border-radius: 6px;
+  margin-top: 16px;
+}
+.send-preview h3 {
+  font-size: 11px;
+  color: var(--ca-muted);
+  margin-bottom: 8px;
+}
+.send-preview p {
+  font-size: 12px;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+}
+.toast {
+  position: fixed;
+  bottom: 22px;
+  left: 50%;
+  transform: translateX(-50%);
+  background: var(--ca-surface);
+  border: 1px solid var(--ca-accent);
+  padding: 12px 18px;
+  border-radius: 6px;
+  box-shadow: 0 8px 35px #0004;
+  z-index: 10;
+  max-width: min(650px, 90vw);
+  font-size: 12px;
+}
+.toast:empty {
+  display: none;
+}
+.ca-tools #viewer-dialog {
+  width: min(1500px, 96vw);
+  height: min(940px, 94dvh);
+  max-height: 94dvh;
+  overflow: hidden;
+  padding: 18px;
+}
+.viewer-layout {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 340px;
+  gap: 20px;
+  height: calc(100% - 72px);
+  min-height: 0;
+}
+.viewer-left {
+  min-width: 0;
+  min-height: 0;
+  display: flex;
+  flex-direction: column;
+  background: var(--ca-field);
+  border-radius: 6px;
+  overflow: hidden;
+  border: 1px solid var(--line);
+}
+#viewer-stage {
+  flex: 1;
+  position: relative;
+  min-height: 0;
+}
+#viewer-stage > img {
+  width: 100%;
+  height: 100%;
+  object-fit: contain;
+  visibility: hidden;
+}
+#viewer-stage > .viewer-container {
+  position: absolute;
+  inset: 0;
+}
+.viewer-toolbar {
+  display: flex;
+  justify-content: center;
+  gap: 6px;
+  flex-wrap: wrap;
+  padding: 10px;
+  border-top: 1px solid var(--line);
+}
+#viewer-details {
+  overflow-y: auto;
+  padding: 0 6px 18px;
+}
+.timeline-panel {
+  margin-top: 18px;
+}
+.timeline {
+  overflow-x: auto;
+  background: var(--ca-field);
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  padding: 18px 20px;
+  position: relative;
+}
+.positive-lane {
+  height: 40px;
+  border-top: 2px solid var(--green);
+  margin: 17px 0 0;
+  min-width: 520px;
+  position: relative;
+}
+.positive-lane:before {
+  content: "+";
+  position: absolute;
+  top: -13px;
+  left: 0;
+  border-radius: 50%;
+  width: 25px;
+  height: 25px;
+  background: var(--green);
+  color: #172b22;
+  text-align: center;
+}
+.positive-lane span {
+  font-size: 10px;
+  color: var(--green);
+  position: absolute;
+  top: -25px;
+  left: 38px;
+}
+.variant-lane {
+  position: relative;
+  min-width: 520px;
+  height: 57px;
+  margin-left: 38px;
+  border-top: 2px solid color-mix(in srgb, var(--red) 60%, transparent);
+}
+.variant-lane:before {
+  content: "";
+  position: absolute;
+  top: -25px;
+  left: -30px;
+  width: 30px;
+  height: 25px;
+  border-left: 2px solid var(--red);
+  border-bottom: 2px solid var(--red);
+  border-radius: 0 0 0 22px;
+}
+.ca-tools .variant-dot {
+  position: absolute;
+  top: -16px;
+  left: 0;
+  border-radius: 50%;
+  width: 29px;
+  min-height: 29px;
+  background: var(--red);
+  color: #38151b;
+  border: 2px solid var(--red);
+  padding: 0;
+}
+.variant-dot[aria-pressed="true"] {
+  outline: 3px solid var(--ca-focus);
+  outline-offset: 4px;
+}
+.variant-lane span {
+  position: absolute;
+  left: 43px;
+  top: 6px;
+  font-size: 10px;
+  color: var(--ca-muted);
+}
+.ca-tools .run-dot {
+  position: absolute;
+  top: -7px;
+  left: 190px;
+  border-radius: 50%;
+  width: 12px;
+  min-height: 12px;
+  padding: 0;
+  background: var(--ca-field);
+  border: 2px solid var(--red);
+}
+.timeline-lower {
+  display: flex;
+  justify-content: space-between;
+  gap: 10px;
+  align-items: center;
+  margin-top: 14px;
+}
+.compare-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 15px;
+}
+.compare-item {
+  padding: 15px;
+  background: var(--ca-field);
+  border: 1px solid var(--line);
+  border-radius: 6px;
+}
+.compare-item h3 {
+  color: var(--red);
+  font-size: 11px;
+  margin-bottom: 8px;
+}
+.diff-added {
+  background: var(--soft-blue);
+  color: var(--ca-focus);
+  padding: 3px 7px;
+  display: inline-block;
+  border-radius: 4px;
+  margin: 5px 5px 0 0;
+  font-size: 11px;
+}
+.file-drop {
+  display: grid;
+  place-items: center;
+  min-height: 170px;
+  border: 1px dashed var(--ca-border);
+  border-radius: 7px;
+  background: var(--ca-field);
+  padding: 22px;
+  text-align: center;
+  gap: 12px;
+}
+.file-drop input {
+  max-width: 100%;
+  font-size: 12px;
+}
+.empty {
+  padding: 50px;
+  text-align: center;
+  grid-column: 1/-1;
+  border: 1px dashed var(--line);
+  border-radius: 6px;
+  color: var(--ca-muted);
+}
+.sample-tag {
+  font-size: 9px;
+  letter-spacing: 1px;
+  color: var(--ca-muted);
+  text-transform: uppercase;
+}
+.review-intro {
+  max-width: 800px;
+  margin-bottom: 24px;
+  line-height: 1.8;
+}
+.review-intro p {
+  font-size: 13px;
+  color: var(--ca-muted);
+}
+.activity-item {
+  padding: 16px 0;
+  border-bottom: 1px solid var(--line);
+}
+.activity-item h3 {
+  font-size: 13px;
+}
+.activity-item p {
+  font-size: 11px;
+  color: var(--ca-muted);
+  margin-top: 6px;
+}
+progress {
+  accent-color: var(--ca-accent);
+  width: 100%;
+  height: 7px;
+  margin: 12px 0;
+}
+.ca-tools .list-grid {
+  grid-template-columns: 1fr;
+}
+.list-grid .media-card {
+  display: flex;
+}
+.list-grid .media-art {
+  width: 160px;
+  flex-shrink: 0;
+}
+.list-grid .media-info {
+  flex: 1;
+}
+.list-grid .image-open img {
+  height: 95px;
+  aspect-ratio: auto;
+}
+.list-grid .image-overlays {
+  display: none;
+}
+.icon-set {
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  margin: 18px 0;
+}
+.icon-set .icon {
+  width: 28px;
+  height: 28px;
+  color: var(--ca-focus);
+}
+@media (min-width: 1700px) {
+  .image-grid {
+    grid-template-columns: repeat(4, minmax(0, 1fr));
+  }
+  .image-grid.compact {
+    grid-template-columns: repeat(5, minmax(0, 1fr));
+  }
+  .library-grid {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+}
+@media (max-width: 1250px) {
+  .app-shell {
+    grid-template-columns: 185px minmax(0, 1fr);
+  }
+  .sidebar {
+    padding-inline: 9px;
+  }
+  .gallery-layout {
+    grid-template-columns: minmax(0, 1fr) 275px;
+    gap: 15px;
+  }
+  .image-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+  .image-grid.compact {
+    grid-template-columns: repeat(3, minmax(0, 1fr));
+  }
+  main {
+    padding: 24px;
+  }
+  .topbar {
+    padding-inline: 24px;
+  }
+  .concept-badge {
+    display: none;
+  }
+  .viewer-layout {
+    grid-template-columns: minmax(0, 1fr) 300px;
+  }
+  .brand {
+    font-size: 12px;
+  }
+}
+@media (max-width: 950px) {
+  .app-shell {
+    grid-template-columns: 1fr;
+  }
+  .sidebar {
+    height: auto;
+    position: static;
+    border-inline-end: 0;
+    border-bottom: 1px solid var(--line);
+    padding: 12px 18px;
+    display: block;
+    overflow: visible;
+  }
+  .brand {
+    margin: 0 0 12px;
+  }
+  .sidebar-label,
+  .sidebar-bottom .connection,
+  #collections-nav {
+    display: none;
+  }
+  .sidebar nav {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 4px;
+  }
+  .sidebar nav a {
+    min-height: 32px;
+    padding: 5px 10px;
+  }
+  .sidebar-bottom {
+    padding: 0;
+    margin: 5px 0 0;
+  }
+  .sidebar nav .nav-count {
+    display: none;
+  }
+  .sidebar-bottom nav {
+    border-top: 1px solid var(--line);
+    padding-top: 5px;
+  }
+  .gallery-layout {
+    grid-template-columns: minmax(0, 1fr) 280px;
+  }
+  .topbar {
+    height: auto;
+    min-height: 58px;
+    flex-wrap: wrap;
+    padding-block: 10px;
+  }
+  .summary-metrics {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+  .viewer-layout {
+    grid-template-columns: minmax(0, 1fr) 270px;
+  }
+  .library-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+}
+@media (max-width: 700px) {
+  main {
+    padding: 20px 14px;
+  }
+  .topbar {
+    padding-inline: 14px;
+  }
+  .breadcrumbs {
+    display: none;
+  }
+  .top-actions {
+    width: 100%;
+    justify-content: space-between;
+    gap: 8px;
+  }
+  .theme-label {
+    font-size: 0;
+  }
+  .theme-label select {
+    font-size: 11px;
+  }
+  .gallery-layout {
+    grid-template-columns: 1fr;
+  }
+  .detail-panel {
+    position: static;
+  }
+  .detail-cover {
+    height: 200px;
+  }
+  .image-grid,
+  .image-grid.large {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+  .image-grid.compact {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+  .heading {
+    align-items: flex-start;
+    flex-direction: column;
+  }
+  .heading-actions {
+    width: 100%;
+  }
+  h1 {
+    font-size: 25px;
+  }
+  .toolbar {
+    gap: 8px;
+  }
+  .toolbar .search-field {
+    flex-basis: 100%;
+  }
+  .library-grid,
+  .two-col,
+  .compare-grid {
+    grid-template-columns: 1fr;
+  }
+  .notice {
+    align-items: flex-start;
+    flex-direction: column;
+  }
+  .setting-row {
+    gap: 16px;
+  }
+  .setting-row > div {
+    max-width: 65%;
+  }
+  .setting-row input,
+  .setting-row select {
+    min-width: 0 !important;
+    max-width: 120px !important;
+  }
+  .operation {
+    align-items: flex-start;
+    flex-direction: column;
+  }
+  .operation .row-actions {
+    flex-wrap: wrap;
+  }
+  .app-footer {
+    padding: 20px 14px;
+    flex-direction: column;
+    align-items: flex-start;
+  }
+  .ca-tools #viewer-dialog {
+    height: 94dvh;
+    overflow: auto;
+  }
+  .viewer-layout {
+    display: flex;
+    flex-direction: column;
+    height: auto;
+  }
+  .viewer-left {
+    height: 48dvh;
+    min-height: 300px;
+  }
+  .viewer-toolbar button {
+    font-size: 10px;
+  }
+  #viewer-details {
+    overflow: visible;
+  }
+  .card-art {
+    height: 150px !important;
+  }
+  .card-art img {
+    height: 150px;
+  }
+  .card-content {
+    padding: 15px;
+  }
+  .sidebar nav a {
+    font-size: 11px;
+    gap: 6px;
+  }
+  .sidebar nav .icon {
+    width: 14px;
+    height: 14px;
+  }
+  .brand {
+    font-size: 14px;
+  }
+  .table-wrap {
+    margin-inline: -10px;
+  }
+  .meta-grid {
+    font-size: 12px;
+  }
+  .toast {
+    bottom: 12px;
+  }
+  .viewer-dialog .dialog-header h2 {
+    font-size: 14px;
+  }
+}
+@media (prefers-reduced-motion: reduce) {
+  * {
+    transition: none !important;
+    scroll-behavior: auto !important;
+  }
+}
+@media (forced-colors: active) {
+  .media-card.selected,
+  .variant-dot[aria-pressed="true"] {
+    outline: 2px solid Highlight;
+  }
+  .icon {
+    forced-color-adjust: auto;
+  }
+}
+@media (pointer: coarse) {
+  .ca-tools button {
+    min-height: 40px;
+  }
+  .ca-tools .prompt-actions button {
+    min-height: 36px;
+    min-width: 36px;
+  }
+}
+
+.setting-row .ca-switch input {
+  width: 36px;
+  height: 24px;
+}
+.spaced {
+  margin-top: 18px;
+}
+.spaced-16 {
+  margin-top: 16px;
+}
+.spaced-20 {
+  margin-top: 20px;
+}
+.history-gallery {
+  margin-top: 24px;
+}
+.sample-preview {
+  width: 100%;
+  height: 180px;
+  object-fit: cover;
+  border-radius: 5px;
+}
+.sample-fluid {
+  width: 100%;
+  height: auto;
+}
+.local-file-preview {
+  width: 100%;
+  max-height: 400px;
+  object-fit: contain;
+  margin-top: 20px;
+}
+.variant-lane {
+  margin-left: var(--lane-offset, 38px);
+}
+
+.spaced-15 {
+  margin-top: 15px;
+}
+
+/* The same DOM order is kept across all three layouts. */
+.masonry-grid {
+  position: relative;
+  block-size: var(--masonry-height, auto);
+  align-items: start;
+}
+.masonry-grid > .media-card {
+  position: absolute;
+  inset-inline-start: var(--masonry-x, 0);
+  inset-block-start: var(--masonry-y, 0);
+  inline-size: var(--masonry-width);
+}
+.masonry-grid .image-open img {
+  aspect-ratio: var(--media-ratio);
+  object-fit: contain;
+}
+.image-card-actions {
+  display: flex;
+  align-items: center;
+  gap: 5px;
+  flex-shrink: 0;
+}
+.media-info > .image-card-actions {
+  min-width: max-content;
+}
+.tag-image-heading {
+  display: flex;
+  gap: 16px;
+  align-items: center;
+  margin-bottom: 18px;
+}
+.tag-image-heading h3 {
+  font-size: 15px;
+  margin-bottom: 6px;
+}
+.tag-image-heading .chip {
+  margin-top: 8px;
+}
+.tag-image-preview {
+  inline-size: 112px;
+  block-size: 100px;
+  object-fit: cover;
+  border-radius: 5px;
+  border: 1px solid var(--line);
+  flex-shrink: 0;
+}
+.tag-model-panel {
+  padding: 16px;
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  background: var(--ca-field);
+  margin-top: 18px;
+}
+.tag-model-panel h3 {
+  font-size: 13px;
+}
+.tag-model-panel .field {
+  margin-block: 12px;
+}
+.tag-model-panel .field input,
+.tag-model-panel .field textarea,
+.tag-model-panel .field select {
+  background: var(--ca-surface);
+}
+.tag-suggestion-panel {
+  margin-top: 20px;
+}
+.tag-suggestion {
+  display: flex;
+  gap: 10px;
+  align-items: center;
+  padding: 10px 12px;
+  border: 1px solid var(--line);
+  border-radius: 5px;
+  margin-bottom: 6px;
+  cursor: pointer;
+  font-size: 12px;
+}
+.tag-suggestion input {
+  accent-color: var(--ca-accent);
+  flex-shrink: 0;
+}
+.tag-suggestion:has(input:checked) {
+  border-color: var(--ca-accent);
+  background: var(--soft-blue);
+}
+.tag-confidence {
+  margin-inline-start: auto;
+  color: var(--ca-muted);
+  font-size: 11px;
+}
+#tag-generation-status {
+  margin-top: 10px;
+}
+.tag-scope-note {
+  padding: 10px 12px;
+  border-inline-start: 2px solid var(--ca-accent);
+  background: var(--ca-field);
+}
+@media (max-width: 700px) {
+  .image-card-actions {
+    gap: 3px;
+  }
+  .ca-tools .media-info .image-card-actions button {
+    min-width: 24px;
+    min-height: 28px;
+  }
+  .tag-image-preview {
+    inline-size: 86px;
+    block-size: 86px;
+  }
+}
+
+.tagging-modal .dialog-actions {
+  position: sticky;
+  inset-block-end: -24px;
+  margin: 18px -24px -24px;
+  padding: 15px 24px;
+  background: var(--ca-surface);
+  border-top: 1px solid var(--line);
+  z-index: 1;
+}
+
+.infinite-continuation {
+  padding-block: 20px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  min-block-size: 72px;
+}