Improve FAQ & video rendering, tighten homepage and CSS

video/src/config.ts

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+export const APP_URL = process.env.APP_URL ?? 'http://host.docker.internal:3001';
+export const DASHBOARD_PATH = '/dashboard';
+
+export const AUTH_STATE_PATH = 'auth.json';
+export const OUTPUT_DIR = 'output';
+
+const aspect = process.env.ASPECT ?? '16x9';
+export const VIEWPORT =
+  aspect === '9x16' ? { width: 1080, height: 1920 } : { width: 1920, height: 1080 };
+
+export const PROMPT_TEXT =
+  process.env.PROMPT_TEXT ?? 'Near Kings Cross, EPC C+, under £600k';
+
+// Filter the AI stub will "return". Keys must match real feature names from
+// /api/features. Pulled from the running server's schema.
+export const STUBBED_FILTERS: Record<string, [number, number] | string[]> = {
+  'Estimated current price': [0, 600000],
+  'Number of bedrooms & living rooms': [4, 6],
+  'Property type': ['Detached', 'Semi-Detached', 'Terraced'],
+  'Distance to nearest train or tube station (km)': [0, 1.0],
+};
+
+// Slider we'll drag in scene 3. Must be a numeric (range) feature, and must
+// already be in STUBBED_FILTERS so the card is mounted by the time we drag.
+export const DRAG_FILTER_NAME =
+  process.env.DRAG_FILTER_NAME ?? 'Estimated current price';
+// Fraction of the track to drag the right thumb to (0..1 from the left).
+export const DRAG_TO_FRACTION = 0.55;
+
+// London-ish view used for the cold open.
+export const COLD_OPEN_VIEW = '#lat=51.535&lon=-0.105&zoom=11';
+
+// Hard cap on the trimmed output. Scene-time overhead (CDP roundtrips,
+// boundingBox calls, layout settling) varies run-to-run, so we trim to a
+// deterministic length even if total scene wall time exceeds it.
+export const MAX_DURATION_S = Number(process.env.MAX_DURATION_S ?? 15);
+
+// Slow down all interactions and animations by this factor while recording,
+// then speed the output back up by the same factor in ffmpeg. The visible
+// animation speed in the final video is unchanged, but each visual frame had
+// N× more wall time to render → fewer dropped frames, smoother motion.
+//
+// 1   = no slow-down (choppy on software GL)
+// 2   = double recording length, ~2× more unique frames in output (recommended)
+// 3-4 = even smoother, slower to produce; diminishing returns past 4
+export const RECORD_SCALE = Math.max(1, Number(process.env.RECORD_SCALE ?? 3));
+
+// Target fps of the FINAL output. We force ffmpeg to interpolate up to this
+// rate so the speed-up doesn't leave gaps.
+export const OUTPUT_FPS = Number(process.env.OUTPUT_FPS ?? 60);