diff --git a/webdev-prosjekt1/package-lock.json b/webdev-prosjekt1/package-lock.json
index 07ec093..5792b1d 100644
--- a/webdev-prosjekt1/package-lock.json
+++ b/webdev-prosjekt1/package-lock.json
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+          "url": "https://github.com/sponsors/csstools"
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@@ -402,6 +627,24 @@
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+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.11.tgz",
+      "integrity": "sha512-fhACrNXUidIbGSBr5FlbuBkO7VWC1ZyLl0DO4CU2DrQoAPxX84Ysxs+HeGQpii5lZWV1Q4gBZTTu49mF+A6Edw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/expect": "4.1.11",
+        "@vitest/mocker": "4.1.11",
+        "@vitest/pretty-format": "4.1.11",
+        "@vitest/runner": "4.1.11",
+        "@vitest/snapshot": "4.1.11",
+        "@vitest/spy": "4.1.11",
+        "@vitest/utils": "4.1.11",
+        "es-module-lexer": "^2.0.0",
+        "expect-type": "^1.3.0",
+        "magic-string": "^0.30.21",
+        "obug": "^2.1.1",
+        "pathe": "^2.0.3",
+        "picomatch": "^4.0.3",
+        "std-env": "^4.0.0-rc.1",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^1.0.2",
+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.1.0",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || >=24.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "4.1.11",
+        "@vitest/browser-preview": "4.1.11",
+        "@vitest/browser-webdriverio": "4.1.11",
+        "@vitest/coverage-istanbul": "4.1.11",
+        "@vitest/coverage-v8": "4.1.11",
+        "@vitest/ui": "4.1.11",
+        "happy-dom": "*",
+        "jsdom": "*",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/coverage-istanbul": {
+          "optional": true
+        },
+        "@vitest/coverage-v8": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        },
+        "vite": {
+          "optional": false
+        }
+      }
+    },
+    "node_modules/w3c-xmlserializer": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-5.0.0.tgz",
+      "integrity": "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "xml-name-validator": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/webidl-conversions": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-8.0.1.tgz",
+      "integrity": "sha512-BMhLD/Sw+GbJC21C/UgyaZX41nPt8bUTg+jWyDeg7e7YN4xOM05YPSIXceACnXVtqyEw/LMClUQMtMZ+PGGpqQ==",
+      "dev": true,
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/whatwg-mimetype": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-4.0.0.tgz",
+      "integrity": "sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/whatwg-url": {
+      "version": "15.1.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-15.1.0.tgz",
+      "integrity": "sha512-2ytDk0kiEj/yu90JOAp44PVPUkO9+jVhyf+SybKlRHSDlvOOZhdPIrr7xTH64l4WixO2cP+wQIcgujkGBPPz6g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tr46": "^6.0.0",
+        "webidl-conversions": "^8.0.0"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -2791,6 +3955,23 @@
         "node": ">= 8"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -2801,6 +3982,45 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/ws": {
+      "version": "8.21.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.21.3.tgz",
+      "integrity": "sha512-201TZ/kPWxoPr/OKWjquZR1SWKXcvxdH+e1xrx89b3YbmzLMFCLfnaG1HFIgWzJOEWZ7MvpK++odZufgYR50Rw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/xml-name-validator": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
+      "integrity": "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
diff --git a/webdev-prosjekt1/package.json b/webdev-prosjekt1/package.json
index c742733..d41ca35 100644
--- a/webdev-prosjekt1/package.json
+++ b/webdev-prosjekt1/package.json
@@ -7,11 +7,13 @@
     "dev": "vite",
     "build": "tsc -b && vite build",
     "lint": "eslint .",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:watch": "vitest"
   },
   "dependencies": {
-    "@tanstack/query-sync-storage-persister": "^5.102.8",
     "@phosphor-icons/react": "^2.1.10",
+    "@tanstack/query-sync-storage-persister": "^5.102.8",
     "@tanstack/react-query": "^5.102.8",
     "@tanstack/react-query-persist-client": "^5.102.8",
     "react": "^19.2.8",
@@ -21,6 +23,10 @@
     "@babel/core": "^7.29.7",
     "@eslint/js": "^10.0.1",
     "@rolldown/plugin-babel": "^0.2.3",
+    "@testing-library/dom": "^10.4.2",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/babel__core": "^7.20.5",
     "@types/node": "^24.13.3",
     "@types/react": "^19.2.18",
@@ -31,8 +37,10 @@
     "eslint-plugin-react-hooks": "^7.1.1",
     "eslint-plugin-react-refresh": "^0.5.4",
     "globals": "^17.11.0",
+    "jsdom": "^27.1.0",
     "typescript": "~6.0.2",
     "typescript-eslint": "^8.67.0",
-    "vite": "^8.3.0"
+    "vite": "^8.3.0",
+    "vitest": "^4.0.18"
   }
 }
diff --git a/webdev-prosjekt1/src/components/AlbumDetailPage.css b/webdev-prosjekt1/src/components/AlbumDetailPage.css
index edfa465..04c272a 100644
--- a/webdev-prosjekt1/src/components/AlbumDetailPage.css
+++ b/webdev-prosjekt1/src/components/AlbumDetailPage.css
@@ -24,7 +24,6 @@
 	aspect-ratio: 1;
 	border: 1px solid var(--border_gold);
 	background: var(--surface_dark_transparent);
-	box-shadow: 18px 22px 0 var(--shadow_gold), 0 24px 50px var(--shadow_black);
 }
 
 .album-detail-page .detail-art::after {
diff --git a/webdev-prosjekt1/src/components/ArtistDetailPage.css b/webdev-prosjekt1/src/components/ArtistDetailPage.css
index 87dc33a..b67a228 100644
--- a/webdev-prosjekt1/src/components/ArtistDetailPage.css
+++ b/webdev-prosjekt1/src/components/ArtistDetailPage.css
@@ -26,15 +26,10 @@
 	border-radius: 50%;
 	overflow: hidden;
 	background: var(--surface_dark_transparent);
-	box-shadow: 18px 22px 0 var(--shadow_gold), 0 24px 50px var(--shadow_black);
 }
 
 .artist-detail-page .detail-art::after {
-	content: '';
-	position: absolute;
-	inset: 13px;
-	border: 1px solid var(--border_gold_inner);
-	border-radius: 50%;
+	display: none;
 }
 
 .artist-detail-page .detail-art img {
diff --git a/webdev-prosjekt1/src/components/PreviewPlayer.tsx b/webdev-prosjekt1/src/components/PreviewPlayer.tsx
index 399000e..35cf098 100644
--- a/webdev-prosjekt1/src/components/PreviewPlayer.tsx
+++ b/webdev-prosjekt1/src/components/PreviewPlayer.tsx
@@ -101,6 +101,7 @@ export const PreviewPlayer = ({ tracks, spotifyUri, onTrackChange }: PreviewPlay
 					title={isPlaying ? 'Pause preview' : 'Play preview'}
 				>
 					<span className={isPlaying ? 'preview-pause-icon' : 'preview-play-icon'} aria-hidden='true' />
+					<span>Preview</span>
 				</button>
 				{spotifyUri && (
 					<a className='spotify-link' href={spotifyUriToWebUrl(spotifyUri)} target='_blank' rel='noreferrer'>
diff --git a/webdev-prosjekt1/src/components/TrackDetailPage.css b/webdev-prosjekt1/src/components/TrackDetailPage.css
index 8f5fc30..e02c12d 100644
--- a/webdev-prosjekt1/src/components/TrackDetailPage.css
+++ b/webdev-prosjekt1/src/components/TrackDetailPage.css
@@ -24,7 +24,6 @@
 	aspect-ratio: 1;
 	border: 1px solid var(--border_gold);
 	background: var(--surface_dark_transparent);
-	box-shadow: 18px 22px 0 var(--shadow_gold), 0 24px 50px var(--shadow_black);
 }
 
 .detail-art::after {
@@ -124,10 +123,13 @@
 
 .preview-player-button {
 	display: grid;
-	place-items: center;
-	width: 44px;
+	grid-template-columns: auto auto;
+	align-items: center;
+	justify-content: center;
+	gap: 10px;
+	min-width: 132px;
 	height: 44px;
-	padding: 0;
+	padding: 0 18px;
 	box-sizing: border-box;
 	border: 1px solid var(--primary_color);
 	border-radius: 999px;
diff --git a/webdev-prosjekt1/src/test/FavButton.test.tsx b/webdev-prosjekt1/src/test/FavButton.test.tsx
new file mode 100644
index 0000000..c9f8b40
--- /dev/null
+++ b/webdev-prosjekt1/src/test/FavButton.test.tsx
@@ -0,0 +1,33 @@
+import { render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, expect, it, beforeEach } from 'vitest';
+import { FavButton } from '../components/FavButton';
+import { FavoritesProvider } from '../hooks/useFavorites';
+import type { AlbumTrack } from '../api/types';
+
+const track: AlbumTrack = {
+	id: 'favorite-track',
+	name: 'Favorite track',
+	type: 'track',
+	href: '',
+	artists: [{ id: 1, name: 'Artist', type: 'artist', href: '', uri: '' }],
+	duration_ms: 180000,
+	track_number: 1,
+	uri: 'spotify:track:favorite-track',
+};
+
+describe('FavButton', () => {
+	beforeEach(() => localStorage.clear());
+
+	it('adds and removes a favorite while persisting the change', async () => {
+		const user = userEvent.setup();
+		render(<FavoritesProvider><FavButton track={track} /></FavoritesProvider>);
+		const button = screen.getByRole('button');
+
+		await user.click(button);
+		expect(JSON.parse(localStorage.getItem('favorites') ?? '[]')).toEqual([track]);
+
+		await user.click(button);
+		expect(JSON.parse(localStorage.getItem('favorites') ?? '[]')).toEqual([]);
+	});
+});
\ No newline at end of file
diff --git a/webdev-prosjekt1/src/test/FilterPopup.test.tsx b/webdev-prosjekt1/src/test/FilterPopup.test.tsx
new file mode 100644
index 0000000..e6c57f5
--- /dev/null
+++ b/webdev-prosjekt1/src/test/FilterPopup.test.tsx
@@ -0,0 +1,49 @@
+import { cleanup, render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { useState } from 'react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { EMPTY_FILTERS, FilterPopup, type Filters } from '../components/FilterPopup';
+
+const renderFilterPopup = (onClose = vi.fn(), onClear = vi.fn()) => {
+	const onChange = vi.fn();
+	const Wrapper = () => {
+		const [filters, setFilters] = useState<Filters>(EMPTY_FILTERS);
+		return <FilterPopup filters={filters} onChange={(nextFilters) => { setFilters(nextFilters); onChange(nextFilters); }} onClear={onClear} onClose={onClose} />;
+	};
+
+	return { ...render(<Wrapper />), onChange };
+};
+
+describe('FilterPopup', () => {
+	afterEach(cleanup);
+
+	it('updates text, toggle, and genre filters', async () => {
+		const user = userEvent.setup();
+		const { onChange } = renderFilterPopup();
+
+		await user.type(screen.getByPlaceholderText('Artist name'), 'Kygo');
+		await user.click(screen.getByText('New releases only'));
+		await user.click(screen.getByRole('button', { name: 'pop' }));
+
+		expect(onChange).toHaveBeenLastCalledWith({
+			...EMPTY_FILTERS,
+			artist: 'Kygo',
+			onlyNew: true,
+			genres: ['pop'],
+		});
+	});
+
+	it('clears filters and closes from the overlay or close button', async () => {
+		const user = userEvent.setup();
+		const onClose = vi.fn();
+		const onClear = vi.fn();
+		const { container } = renderFilterPopup(onClose, onClear);
+
+		await user.click(screen.getByRole('button', { name: 'Clear' }));
+		await user.click(screen.getByRole('button', { name: 'Close filters' }));
+		await user.click(container.querySelector('.filter-overlay') as HTMLElement);
+
+		expect(onClear).toHaveBeenCalledOnce();
+		expect(onClose).toHaveBeenCalledTimes(2);
+	});
+});
\ No newline at end of file
diff --git a/webdev-prosjekt1/src/test/PreviewPlayer.test.tsx b/webdev-prosjekt1/src/test/PreviewPlayer.test.tsx
new file mode 100644
index 0000000..e903bba
--- /dev/null
+++ b/webdev-prosjekt1/src/test/PreviewPlayer.test.tsx
@@ -0,0 +1,43 @@
+import { render, screen, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { beforeAll, describe, expect, it, vi } from 'vitest';
+import { PreviewPlayer } from '../components/PreviewPlayer';
+
+vi.mock('../api/itunes', () => ({
+	fetchPreview: vi.fn().mockResolvedValue('https://cdn.example/preview.mp3'),
+}));
+
+const track = {
+	id: 'preview-track',
+	name: 'Preview track',
+	artists: [{ name: 'Preview artist' }],
+};
+
+describe('PreviewPlayer', () => {
+	beforeAll(() => {
+		Object.defineProperty(HTMLMediaElement.prototype, 'play', {
+			configurable: true,
+			value: vi.fn().mockResolvedValue(undefined),
+		});
+		Object.defineProperty(HTMLMediaElement.prototype, 'pause', {
+			configurable: true,
+			value: vi.fn(),
+		});
+	});
+
+	it('plays and pauses a mocked preview and exposes the Spotify link', async () => {
+		const user = userEvent.setup();
+		const onTrackChange = vi.fn();
+
+		render(<PreviewPlayer tracks={[track]} spotifyUri='spotify:track:preview-track' onTrackChange={onTrackChange} />);
+		const button = screen.getByRole('button', { name: 'Play preview' });
+
+		expect(screen.getByRole('link', { name: 'Open in Spotify' })).toHaveAttribute('href', 'https://open.spotify.com/track/preview-track');
+		await user.click(button);
+		await waitFor(() => expect(screen.getByRole('button', { name: 'Pause preview' })).toBeEnabled());
+		expect(onTrackChange).toHaveBeenCalledWith('preview-track');
+
+		await user.click(screen.getByRole('button', { name: 'Pause preview' }));
+		expect(onTrackChange).toHaveBeenLastCalledWith(null);
+	});
+});
\ No newline at end of file
diff --git a/webdev-prosjekt1/src/test/Searchbar.test.tsx b/webdev-prosjekt1/src/test/Searchbar.test.tsx
new file mode 100644
index 0000000..34cabea
--- /dev/null
+++ b/webdev-prosjekt1/src/test/Searchbar.test.tsx
@@ -0,0 +1,28 @@
+import { render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, expect, it, vi } from 'vitest';
+import { Searchbar } from '../components/Searchbar';
+
+describe('Searchbar', () => {
+	it('submits trimmed input and clears it through user interaction', async () => {
+		const user = userEvent.setup();
+		const onSearch = vi.fn();
+
+		render(<Searchbar onSearch={onSearch} />);
+		const input = screen.getByRole('searchbox');
+
+		await user.type(input, '  Daft Punk  ');
+		await user.keyboard('{Enter}');
+		expect(onSearch).toHaveBeenCalledWith('Daft Punk');
+
+		await user.click(screen.getByRole('button', { name: 'Clear search' }));
+		expect(input).toHaveValue('');
+		expect(onSearch).toHaveBeenLastCalledWith('');
+	});
+
+	it('renders a stable snapshot from its initial prop', () => {
+		const { container } = render(<Searchbar onSearch={vi.fn()} initialQuery='Muse' />);
+
+		expect(container.firstChild).toMatchSnapshot();
+	});
+});
\ No newline at end of file
diff --git a/webdev-prosjekt1/src/test/TrackCard.test.tsx b/webdev-prosjekt1/src/test/TrackCard.test.tsx
new file mode 100644
index 0000000..9c76010
--- /dev/null
+++ b/webdev-prosjekt1/src/test/TrackCard.test.tsx
@@ -0,0 +1,46 @@
+import { render } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, expect, it, vi } from 'vitest';
+import { TrackCard } from '../components/TrackCard';
+import type { Track } from '../api/types';
+
+vi.mock('../hooks/useFavorites', () => ({
+	useFavorites: () => ({
+		favorites: [],
+		addFavorite: vi.fn(),
+		removeFavorite: vi.fn(),
+	}),
+}));
+
+const track: Track = {
+	id: 'track-1',
+	name: 'Harder Better Faster Stronger',
+	type: 'track',
+	href: 'https://api.spotify.com/v1/tracks/track-1',
+	artists: [{ id: 1, name: 'Daft Punk', type: 'artist', href: '', uri: '' }],
+	album: {
+		id: 'album-1', name: 'Discovery', album_type: 'album', href: '', artists: [], images: [],
+		release_date: '2001', release_date_precision: 'year', total_tracks: 14, uri: '',
+	},
+	duration_ms: 224000,
+	explicit: false,
+	track_number: 4,
+	external_ids: { isrc: 'TRACK-1' },
+	is_playable: true,
+	uri: 'spotify:track:track-1',
+};
+
+describe('TrackCard', () => {
+	it('uses the active prop and calls its click handler', async () => {
+		const user = userEvent.setup();
+		const onClick = vi.fn();
+
+		const { container } = render(<TrackCard track={track} isActive onClick={onClick} />);
+		const card = container.querySelector('li');
+		expect(card).not.toBeNull();
+
+		expect(card).toHaveClass('is-active');
+		await user.click(card as HTMLElement);
+		expect(onClick).toHaveBeenCalledOnce();
+	});
+});
\ No newline at end of file
diff --git a/webdev-prosjekt1/src/test/__snapshots__/Searchbar.test.tsx.snap b/webdev-prosjekt1/src/test/__snapshots__/Searchbar.test.tsx.snap
new file mode 100644
index 0000000..b210245
--- /dev/null
+++ b/webdev-prosjekt1/src/test/__snapshots__/Searchbar.test.tsx.snap
@@ -0,0 +1,39 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`Searchbar > renders a stable snapshot from its initial prop 1`] = `
+<form
+  class="searchbar"
+>
+  <svg
+    aria-hidden="true"
+    class="search-icon"
+    fill="currentColor"
+    height="22"
+    viewBox="0 0 256 256"
+    width="22"
+    xmlns="http://www.w3.org/2000/svg"
+  >
+    <path
+      d="M229.66,218.34l-50.07-50.06a88.11,88.11,0,1,0-11.31,11.31l50.06,50.07a8,8,0,0,0,11.32-11.32ZM40,112a72,72,0,1,1,72,72A72.08,72.08,0,0,1,40,112Z"
+    />
+  </svg>
+  <input
+    aria-label="Search music"
+    placeholder="Search artists, albums or tracks"
+    type="search"
+    value="Muse"
+  />
+  <button
+    aria-label="Clear search"
+    class="search-clear-button"
+    title="Clear search"
+    type="button"
+  >
+    <span
+      aria-hidden="true"
+    >
+      ×
+    </span>
+  </button>
+</form>
+`;
diff --git a/webdev-prosjekt1/src/test/setup.ts b/webdev-prosjekt1/src/test/setup.ts
new file mode 100644
index 0000000..6df58f0
--- /dev/null
+++ b/webdev-prosjekt1/src/test/setup.ts
@@ -0,0 +1 @@
+import '@testing-library/jest-dom/vitest';
\ No newline at end of file
diff --git a/webdev-prosjekt1/src/test/spotify.test.ts b/webdev-prosjekt1/src/test/spotify.test.ts
new file mode 100644
index 0000000..17ba7e0
--- /dev/null
+++ b/webdev-prosjekt1/src/test/spotify.test.ts
@@ -0,0 +1,53 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { search, spotifyUriToWebUrl } from '../api/spotify';
+
+const fetchMock = vi.fn();
+
+vi.stubGlobal('fetch', fetchMock);
+
+describe('Spotify API', () => {
+	beforeEach(() => {
+		fetchMock.mockReset();
+	});
+
+	it('gets a token and maps search results without calling the network', async () => {
+		fetchMock
+			.mockResolvedValueOnce({
+				ok: true,
+				json: vi.fn().mockResolvedValue({ access_token: 'test-token', expires_in: 3600 }),
+			})
+			.mockResolvedValueOnce({
+				ok: true,
+				json: vi.fn().mockResolvedValue({
+					artists: { items: [{ id: 1, name: 'Kygo' }] },
+					tracks: { items: [{ id: 'track-1', name: 'Firestone' }] },
+					albums: { items: [{ id: 'album-1', name: 'Cloud Nine' }] },
+				}),
+			});
+
+		const result = await search('Kygo & Jo');
+
+		expect(result).toEqual({
+			artists: [{ id: 1, name: 'Kygo' }],
+			tracks: [{ id: 'track-1', name: 'Firestone' }],
+			albums: [{ id: 'album-1', name: 'Cloud Nine' }],
+		});
+		expect(fetchMock).toHaveBeenCalledTimes(2);
+		expect(fetchMock.mock.calls[1][0]).toContain('q=Kygo%20%26%20Jo');
+		expect(fetchMock.mock.calls[1][1]).toMatchObject({
+		method: 'GET',
+		headers: { Authorization: 'Bearer test-token' },
+	});
+	});
+
+	it('throws a useful error for a failed Spotify request and converts Spotify URIs', async () => {
+		fetchMock.mockResolvedValueOnce({
+			ok: false,
+			status: 503,
+		});
+
+		await expect(search('unavailable')).rejects.toThrow('Spotify api error: 503');
+		expect(spotifyUriToWebUrl('spotify:album:album-1')).toBe('https://open.spotify.com/album/album-1');
+		expect(spotifyUriToWebUrl('not-a-spotify-uri')).toBe('not-a-spotify-uri');
+	});
+});
\ No newline at end of file
diff --git a/webdev-prosjekt1/src/variables.css b/webdev-prosjekt1/src/variables.css
index fb24ff5..523934a 100644
--- a/webdev-prosjekt1/src/variables.css
+++ b/webdev-prosjekt1/src/variables.css
@@ -4,7 +4,8 @@
 	--primary_color_hover: #f7ca65;
 	--primary_background_color: #11100f;
 	--page_background_gradient: radial-gradient(circle at 78% 42%, #43331e 0, #1c1814 28%, #11100f 66%);
-	--detail_background_gradient: radial-gradient(circle at 26% 44%, #43331e 0, #1c1814 31%, #11100f 70%);
+	--detail_glow_position: 25% 340px;
+	--detail_background_gradient: radial-gradient(circle 420px at var(--detail_glow_position), #43331e 0, #1c1814 58%, #11100f 100%);
 	--surface_background: #2b2b2b;
 	--text_primary: #f8f0df;
 	--text_secondary: #d9cdb8;
@@ -23,4 +24,10 @@
 	--search_background: rgba(20, 18, 15, 0.8);
 	--box_border_radius: 4px;
     --margin: 0;
+}
+
+@media (max-width: 900px) {
+	:root {
+		--detail_glow_position: 50% 340px;
+	}
 }
\ No newline at end of file
diff --git a/webdev-prosjekt1/tsconfig.app.json b/webdev-prosjekt1/tsconfig.app.json
index 6830b6f..6f6c9d2 100644
--- a/webdev-prosjekt1/tsconfig.app.json
+++ b/webdev-prosjekt1/tsconfig.app.json
@@ -4,7 +4,7 @@
     "target": "es2023",
     "lib": ["ES2023", "DOM"],
     "module": "esnext",
-    "types": ["vite/client"],
+    "types": ["vite/client", "vitest/globals"],
     "allowArbitraryExtensions": true,
     "skipLibCheck": true,
 
diff --git a/webdev-prosjekt1/vite.config.ts b/webdev-prosjekt1/vite.config.ts
index d789a7c..aa8cc65 100644
--- a/webdev-prosjekt1/vite.config.ts
+++ b/webdev-prosjekt1/vite.config.ts
@@ -1,6 +1,6 @@
 import react, { reactCompilerPreset } from '@vitejs/plugin-react'
 import babel from '@rolldown/plugin-babel'
-import { defineConfig } from 'vite'
+import { defineConfig } from 'vitest/config'
 
 // https://vite.dev/config/
 export default defineConfig({
@@ -8,4 +8,9 @@ export default defineConfig({
     react(),
     babel({ presets: [reactCompilerPreset()] })
   ],
+  test: {
+    environment: 'jsdom',
+    setupFiles: './src/test/setup.ts',
+    css: true,
+  },
 })