diff --git a/web-player/src/lib/components/Sidebar.svelte b/web-player/src/lib/components/Sidebar.svelte
index f5db60e..ac94d01 100644
--- a/web-player/src/lib/components/Sidebar.svelte
+++ b/web-player/src/lib/components/Sidebar.svelte
@@ -69,7 +69,7 @@
 			? 'text-fg'
 			: 'text-fg-3 hover:bg-hover hover:text-fg'}"
 	>
-		<link.icon class="h-6 w-6 shrink-0" style={active ? 'color:var(--mf-accent-60)' : ''} />
+		<link.icon class="h-6 w-6 shrink-0 {active ? 'text-accent-soft' : ''}" />
 		{link.label}
 	</a>
 {/snippet}
@@ -87,10 +87,7 @@
 				: ''}"
 			style="top:{pillTop}px; height:{pillHeight}px; opacity:{pillVisible ? 1 : 0}"
 		>
-			<span
-				class="absolute inset-y-0 left-0 w-[3px] rounded-r-full"
-				style="background:var(--mf-accent-60)"
-			></span>
+			<span class="absolute inset-y-0 left-0 w-[3px] rounded-r-full bg-accent-soft"></span>
 		</div>
 
 		<nav class="relative z-10 flex flex-col gap-1">
diff --git a/web-player/src/lib/components/player/SeekBar.svelte b/web-player/src/lib/components/player/SeekBar.svelte
index af39125..0d51b54 100644
--- a/web-player/src/lib/components/player/SeekBar.svelte
+++ b/web-player/src/lib/components/player/SeekBar.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
 	import { player } from '$lib/player/player.svelte';
-	import { fmtTime } from '$lib/theme/color';
+	import { fmtTime } from '$lib/format';
 
 	function seek(event: MouseEvent) {
 		const rect = (event.currentTarget as HTMLElement).getBoundingClientRect();
@@ -23,11 +23,11 @@
 			style="width:{player.progressPercent}%"
 		></div>
 		<span
-			class="pointer-events-none absolute top-1/2 h-3 w-3 -translate-x-1/2 -translate-y-1/2 rounded-full bg-white opacity-0 shadow-[0_1px_4px_rgba(0,0,0,0.5)] transition-opacity duration-75 group-hover:opacity-100"
+			class="pointer-events-none absolute top-1/2 h-3 w-3 -translate-x-1/2 -translate-y-1/2 rounded-full bg-on-art opacity-0 shadow-[0_1px_4px_rgba(0,0,0,0.5)] transition-opacity duration-75 group-hover:opacity-100"
 			style="left:{player.progressPercent}%"
 		></span>
 	</button>
-	<span class="text-xs text-(--mf-text-4) tabular-nums">
+	<span class="text-xs text-muted tabular-nums">
 		{fmtTime(player.current.duration)}
 	</span>
 </div>
diff --git a/web-player/src/lib/components/player/VolumeControl.svelte b/web-player/src/lib/components/player/VolumeControl.svelte
index 4668aca..7e482bb 100644
--- a/web-player/src/lib/components/player/VolumeControl.svelte
+++ b/web-player/src/lib/components/player/VolumeControl.svelte
@@ -17,7 +17,7 @@
 		oninput={handleVolumeChange}
 		aria-label="Volumen"
 		class="mf-volume"
-		style="background:linear-gradient(to right, var(--mf-accent-60) {player.volume}%, var(--mf-track) {player.volume}%)"
+		style="background:linear-gradient(to right, var(--color-accent-soft) {player.volume}%, var(--color-track) {player.volume}%)"
 	/>
 </div>
 
@@ -37,14 +37,14 @@
 		width: 12px;
 		height: 12px;
 		border-radius: 50%;
-		background: var(--mf-text);
+		background: var(--color-fg);
 		cursor: pointer;
 	}
 	.mf-volume::-moz-range-thumb {
 		width: 12px;
 		height: 12px;
 		border-radius: 50%;
-		background: var(--mf-text);
+		background: var(--color-fg);
 		border: none;
 		cursor: pointer;
 	}
diff --git a/web-player/src/lib/components/ui/Button.svelte b/web-player/src/lib/components/ui/Button.svelte
index 1a13cc7..aebe7ef 100644
--- a/web-player/src/lib/components/ui/Button.svelte
+++ b/web-player/src/lib/components/ui/Button.svelte
@@ -38,7 +38,7 @@
 		primary: 'bg-accent-soft font-semibold text-on-accent active:scale-[0.97]',
 		secondary: 'border border-line text-fg hover:bg-hover',
 		subtle: 'bg-surface-2 font-semibold text-fg hover:bg-surface-hover',
-		danger: 'bg-danger font-semibold text-white hover:brightness-110'
+		danger: 'bg-danger font-semibold text-on-accent hover:brightness-110'
 	};
 
 	const classes = $derived(
diff --git a/web-player/src/lib/components/ui/Modal.svelte b/web-player/src/lib/components/ui/Modal.svelte
index db2eae4..b75fc78 100644
--- a/web-player/src/lib/components/ui/Modal.svelte
+++ b/web-player/src/lib/components/ui/Modal.svelte
@@ -68,7 +68,7 @@
 
 {#if open}
 	<div
-		class="animate-fade fixed inset-0 z-[60] grid place-items-center bg-black/70 p-4 backdrop-blur-sm"
+		class="animate-fade fixed inset-0 z-[60] grid place-items-center bg-scrim/70 p-4 backdrop-blur-sm"
 		role="presentation"
 		onclick={onBackdropClick}
 	>
diff --git a/web-player/src/lib/components/ui/NowPlaying.svelte b/web-player/src/lib/components/ui/NowPlaying.svelte
index 82a9d4b..8856595 100644
--- a/web-player/src/lib/components/ui/NowPlaying.svelte
+++ b/web-player/src/lib/components/ui/NowPlaying.svelte
@@ -13,10 +13,10 @@
 	];
 </script>
 
-<div class="absolute inset-0 flex items-end justify-center gap-[2.5px] bg-black/45 pb-2">
+<div class="absolute inset-0 flex items-end justify-center gap-[2.5px] bg-scrim/45 pb-2">
 	{#each bars as bar, i (i)}
 		<span
-			class="w-[3px] origin-bottom rounded-full bg-white"
+			class="w-[3px] origin-bottom rounded-full bg-on-art"
 			style="height:14px; animation:equalize {bar.dur}s ease-in-out {bar.delay}s infinite; animation-play-state:{paused
 				? 'paused'
 				: 'running'}"
diff --git a/web-player/src/lib/format.ts b/web-player/src/lib/format.ts
new file mode 100644
index 0000000..3dc9836
--- /dev/null
+++ b/web-player/src/lib/format.ts
@@ -0,0 +1,12 @@
+export function fmtTime(seconds: number): string {
+	const total = Math.max(0, Math.floor(seconds || 0));
+	const minutes = Math.floor(total / 60);
+	const rest = total % 60;
+	return `${minutes}:${rest < 10 ? '0' : ''}${rest}`;
+}
+
+const dateFormatter = new Intl.DateTimeFormat('es', { dateStyle: 'medium' });
+
+export function fmtDate(value: string | number | Date): string {
+	return dateFormatter.format(new Date(value));
+}
diff --git a/web-player/src/lib/player/player.svelte.ts b/web-player/src/lib/player/player.svelte.ts
index 04c5d03..73bee90 100644
--- a/web-player/src/lib/player/player.svelte.ts
+++ b/web-player/src/lib/player/player.svelte.ts
@@ -40,7 +40,7 @@ export interface ApiTrackLike {
 	isExplicit?: boolean;
 }
 
-export function isYouTubeTrack(track: ApiTrackLike): boolean {
+function isYouTubeTrack(track: ApiTrackLike): boolean {
 	return track.source === 'YouTube';
 }
 
diff --git a/web-player/src/lib/server/youtube.ts b/web-player/src/lib/server/youtube.ts
index f34b0d9..a1b1d44 100644
--- a/web-player/src/lib/server/youtube.ts
+++ b/web-player/src/lib/server/youtube.ts
@@ -1,7 +1,7 @@
 import type { createApiClient } from '$lib/server/api';
 import type { YouTubeSong } from '$lib/types';
 
-export const YOUTUBE_FILLER_QUERIES = [
+const YOUTUBE_FILLER_QUERIES = [
 	'pop',
 	'rock',
 	'reggaeton',
@@ -24,7 +24,7 @@ export interface YoutubeFiller {
 	continuationToken: string;
 }
 
-export function pickRandomFillerQuery(): string {
+function pickRandomFillerQuery(): string {
 	return YOUTUBE_FILLER_QUERIES[Math.floor(Math.random() * YOUTUBE_FILLER_QUERIES.length)];
 }
 
diff --git a/web-player/src/lib/theme/color.ts b/web-player/src/lib/theme/color.ts
index d7c107c..780e2fb 100644
--- a/web-player/src/lib/theme/color.ts
+++ b/web-player/src/lib/theme/color.ts
@@ -15,23 +15,6 @@ export function accentForHue(hue: number): string {
 	return `oklch(${ACCENT_LIGHTNESS}% ${ACCENT_CHROMA} ${hue})`;
 }
 
-export function accentSoft(hue: number, pct: number): string {
-	return `color-mix(in srgb, ${accentForHue(hue)} ${pct}%, transparent)`;
-}
-
 export function gradientForHue(hue: number): string {
 	return `linear-gradient(135deg, oklch(70% 0.15 ${hue}), oklch(36% 0.13 ${hue + 28}))`;
 }
-
-export function fmtTime(seconds: number): string {
-	const total = Math.max(0, Math.floor(seconds || 0));
-	const minutes = Math.floor(total / 60);
-	const rest = total % 60;
-	return `${minutes}:${rest < 10 ? '0' : ''}${rest}`;
-}
-
-const dateFormatter = new Intl.DateTimeFormat('es', { dateStyle: 'medium' });
-
-export function fmtDate(value: string | number | Date): string {
-	return dateFormatter.format(new Date(value));
-}
diff --git a/web-player/src/lib/theme/theme.css b/web-player/src/lib/theme/theme.css
index 2fc92d3..afed7a3 100644
--- a/web-player/src/lib/theme/theme.css
+++ b/web-player/src/lib/theme/theme.css
@@ -16,7 +16,10 @@
 	--mf-track: rgba(255, 255, 255, 0.12);
 
 	--mf-accent: oklch(60% 0.17 145);
-	--mf-accent-60: color-mix(in oklch, var(--mf-accent) 80%, transparent);
-	--mf-radius: 12px;
+	--mf-accent-soft: color-mix(in oklch, var(--mf-accent) 80%, transparent);
+
+	--mf-scrim: #000000;
+	--mf-on-art: #ffffff;
+
 	--mf-sidebar-w: 264px;
 }
diff --git a/web-player/src/lib/tracks.ts b/web-player/src/lib/tracks.ts
index c29f865..6100ef1 100644
--- a/web-player/src/lib/tracks.ts
+++ b/web-player/src/lib/tracks.ts
@@ -30,7 +30,7 @@ export function targetCoverSrc(target: TrackTarget): string | undefined {
 	return target.kind === 'youtube' ? target.song.thumbnailUrl : undefined;
 }
 
-export function queueIdForTarget(target: TrackTarget): string | number {
+function queueIdForTarget(target: TrackTarget): string | number {
 	return target.kind === 'youtube' ? target.song.videoId : queueIdForTrack(target.track);
 }
 
diff --git a/web-player/src/routes/(app)/explore/+page.server.ts b/web-player/src/routes/(app)/explore/+page.server.ts
index fee8c3e..dbcefdb 100644
--- a/web-player/src/routes/(app)/explore/+page.server.ts
+++ b/web-player/src/routes/(app)/explore/+page.server.ts
@@ -1,5 +1,5 @@
 import type { PageServerLoad, Actions } from './$types';
-import { createApiClient, unwrapOrError } from '$lib/server/api';
+import { createApiClient, requireUser, unwrapOrError } from '$lib/server/api';
 import { fetchYoutubeFiller } from '$lib/server/youtube';
 import { addTrackAction, addYouTubeToPlaylistAction } from '$lib/server/playlistActions';
 import { EXPLORE_PAGE_SIZE as PAGE_SIZE, YOUTUBE_FILLER_LIMIT } from '$lib/config';
@@ -8,23 +8,21 @@ export const load: PageServerLoad = async ({ url, locals, fetch }) => {
 	const query = url.searchParams.get('q')?.trim() ?? '';
 	const page = Math.max(1, Number(url.searchParams.get('page')) || 1);
 
+	const user = requireUser(locals, url);
 	const api = createApiClient({ fetch, accessToken: locals.accessToken ?? undefined });
 
 	const tracksPromise = api.GET('/tracks', {
 		params: { query: { name: query || undefined, pageNumber: page, pageSize: PAGE_SIZE } }
 	});
 
-	const searchPromise =
-		query && locals.accessToken
-			? api.GET('/youtube/search', { params: { query: { query } } })
-			: Promise.resolve(null);
-
-	const playlistsPromise = locals.user
-		? api.GET('/playlists/users/{userId}', {
-				params: { path: { userId: locals.user.sub }, query: { pageNumber: 1, pageSize: 50 } }
-			})
+	const searchPromise = query
+		? api.GET('/youtube/search', { params: { query: { query } } })
 		: Promise.resolve(null);
 
+	const playlistsPromise = api.GET('/playlists/users/{userId}', {
+		params: { path: { userId: user.sub }, query: { pageNumber: 1, pageSize: 50 } }
+	});
+
 	const [tracksRes, searchRes, playlistsRes] = await Promise.all([
 		tracksPromise,
 		searchPromise,
@@ -41,8 +39,7 @@ export const load: PageServerLoad = async ({ url, locals, fetch }) => {
 		youtubeFiller: query
 			? Promise.resolve(null)
 			: fetchYoutubeFiller(api, locals.accessToken, YOUTUBE_FILLER_LIMIT),
-		playlists: playlistsRes?.data?.items ?? [],
-		needsAuth: !locals.user
+		playlists: playlistsRes?.data?.items ?? []
 	};
 };
 
diff --git a/web-player/src/routes/(app)/explore/+page.svelte b/web-player/src/routes/(app)/explore/+page.svelte
index 2699c7c..986906e 100644
--- a/web-player/src/routes/(app)/explore/+page.svelte
+++ b/web-player/src/routes/(app)/explore/+page.svelte
@@ -84,9 +84,7 @@
 
 	const hasMore = $derived(localHasNext || ytContinuation !== '');
 
-	const nothingFound = $derived(
-		!!data.query && items.length === 0 && !data.needsAuth && !data.ytError
-	);
+	const nothingFound = $derived(!!data.query && items.length === 0 && !data.ytError);
 
 	function buildHref(query: string) {
 		return query ? `/explore?q=${encodeURIComponent(query)}` : '/explore';
@@ -212,12 +210,7 @@
 		<InfiniteScroll onLoadMore={loadMore} {hasMore} loading={loadingMore} />
 	{/if}
 
-	{#if data.needsAuth}
-		<EmptyState
-			icon={Music}
-			description="Inicia sesión para ver también resultados de YouTube Music."
-		/>
-	{:else if data.ytError}
+	{#if data.ytError}
 		<EmptyState
 			icon={Music}
 			description="YouTube Music no está disponible ahora mismo. Inténtalo de nuevo."
diff --git a/web-player/src/routes/(app)/library/+page.svelte b/web-player/src/routes/(app)/library/+page.svelte
index 3b73432..7055440 100644
--- a/web-player/src/routes/(app)/library/+page.svelte
+++ b/web-player/src/routes/(app)/library/+page.svelte
@@ -4,7 +4,8 @@
 	import X from '@lucide/svelte/icons/x';
 	import Music from '@lucide/svelte/icons/music';
 	import { player, toQueueItems } from '$lib/player/player.svelte';
-	import { hueFor, fmtTime, fmtDate } from '$lib/theme/color';
+	import { hueFor } from '$lib/theme/color';
+	import { fmtTime, fmtDate } from '$lib/format';
 	import Page from '$lib/components/ui/Page.svelte';
 	import PageHeader from '$lib/components/ui/PageHeader.svelte';
 	import EmptyState from '$lib/components/ui/EmptyState.svelte';
diff --git a/web-player/src/routes/(app)/playlists/[id]/components/PlaylistTrackTable.svelte b/web-player/src/routes/(app)/playlists/[id]/components/PlaylistTrackTable.svelte
index 7cef815..244f373 100644
--- a/web-player/src/routes/(app)/playlists/[id]/components/PlaylistTrackTable.svelte
+++ b/web-player/src/routes/(app)/playlists/[id]/components/PlaylistTrackTable.svelte
@@ -9,7 +9,8 @@
 		youTubeThumbnailUrl,
 		type ApiTrackLike
 	} from '$lib/player/player.svelte';
-	import { hueFor, fmtTime, fmtDate } from '$lib/theme/color';
+	import { hueFor } from '$lib/theme/color';
+	import { fmtTime, fmtDate } from '$lib/format';
 	import Badge from '$lib/components/ui/Badge.svelte';
 	import IconButton from '$lib/components/ui/IconButton.svelte';
 	import TrackTable from '$lib/components/ui/TrackTable.svelte';
diff --git a/web-player/src/routes/(app)/playlists/[id]/components/SuggestionsTable.svelte b/web-player/src/routes/(app)/playlists/[id]/components/SuggestionsTable.svelte
index 9303b18..4c4f6d3 100644
--- a/web-player/src/routes/(app)/playlists/[id]/components/SuggestionsTable.svelte
+++ b/web-player/src/routes/(app)/playlists/[id]/components/SuggestionsTable.svelte
@@ -7,7 +7,8 @@
 		type ApiTrackLike,
 		type QueueItem
 	} from '$lib/player/player.svelte';
-	import { hueFor, fmtTime } from '$lib/theme/color';
+	import { hueFor } from '$lib/theme/color';
+	import { fmtTime } from '$lib/format';
 	import type { YouTubeSong } from '$lib/types';
 	import SectionHeading from '$lib/components/ui/SectionHeading.svelte';
 	import IconButton from '$lib/components/ui/IconButton.svelte';
diff --git a/web-player/src/routes/+layout.svelte b/web-player/src/routes/+layout.svelte
index f9270ba..2ea4655 100644
--- a/web-player/src/routes/+layout.svelte
+++ b/web-player/src/routes/+layout.svelte
@@ -52,18 +52,19 @@
 			if (t < 1) rafId = requestAnimationFrame(tick);
 		};
 		rafId = requestAnimationFrame(tick);
+		return () => cancelAnimationFrame(rafId);
 	});
 </script>
 
 <svelte:head><link rel="icon" href={favicon} /></svelte:head>
 
-{#if isAuthPage}
+{#if isAuthPage || !data.user}
 	<div class="min-h-screen bg-bg text-fg antialiased">
 		{@render children()}
 	</div>
 {:else}
 	<div class="flex min-h-screen bg-bg text-fg antialiased">
-		<Sidebar user={data.user!} />
+		<Sidebar user={data.user} />
 		<div class="flex min-w-0 flex-1 flex-col">
 			<main class="flex-1 transition-[padding] {hasTrack ? 'pb-[92px]' : 'pb-0'}">
 				{#key page.url.pathname}
diff --git a/web-player/src/routes/+page.server.ts b/web-player/src/routes/+page.server.ts
index c739d2d..0fc9ba5 100644
--- a/web-player/src/routes/+page.server.ts
+++ b/web-player/src/routes/+page.server.ts
@@ -1,24 +1,23 @@
 import type { PageServerLoad, Actions } from './$types';
-import { createApiClient, playlistCoverTrackIds } from '$lib/server/api';
+import { createApiClient, playlistCoverTrackIds, requireUser } from '$lib/server/api';
 import { fetchYoutubeFiller, shuffle } from '$lib/server/youtube';
 import { addTrackAction, addYouTubeToPlaylistAction } from '$lib/server/playlistActions';
 import { HOME_LATEST_PAGE_SIZE, YOUTUBE_FILLER_LIMIT } from '$lib/config';
 import { pickGreeting } from '$lib/server/greeting';
 
-export const load: PageServerLoad = async ({ locals, fetch }) => {
+export const load: PageServerLoad = async ({ locals, url, fetch }) => {
+	const user = requireUser(locals, url);
 	const api = createApiClient({ fetch, accessToken: locals.accessToken ?? undefined });
 
 	const latestPromise = api.GET('/tracks', {
 		params: { query: { pageNumber: 1, pageSize: HOME_LATEST_PAGE_SIZE } }
 	});
-	const playlistsPromise = locals.user
-		? api.GET('/playlists/users/{userId}', {
-				params: { path: { userId: locals.user.sub }, query: { pageNumber: 1, pageSize: 12 } }
-			})
-		: Promise.resolve({ data: undefined });
-	const recentlyPlayedPromise = locals.user
-		? api.GET('/users/{id}/listening-history', { params: { path: { id: locals.user.sub } } })
-		: Promise.resolve({ data: undefined });
+	const playlistsPromise = api.GET('/playlists/users/{userId}', {
+		params: { path: { userId: user.sub }, query: { pageNumber: 1, pageSize: 12 } }
+	});
+	const recentlyPlayedPromise = api.GET('/users/{id}/listening-history', {
+		params: { path: { id: user.sub } }
+	});
 
 	const [latest, playlists, recentlyPlayed] = await Promise.all([
 		latestPromise,
diff --git a/web-player/src/routes/+page.svelte b/web-player/src/routes/+page.svelte
index 785c6ff..e950636 100644
--- a/web-player/src/routes/+page.svelte
+++ b/web-player/src/routes/+page.svelte
@@ -171,7 +171,7 @@
 <section class="relative overflow-hidden page-x pt-11 pb-16">
 	<div
 		class="pointer-events-none absolute inset-0 blur-[70px] saturate-150"
-		style="background:linear-gradient(135deg, var(--mf-accent), color-mix(in oklch, var(--mf-accent), black 55%));animation:breathe 9s ease-in-out infinite"
+		style="background:linear-gradient(135deg, var(--color-accent), color-mix(in oklch, var(--color-accent), black 55%));animation:breathe 9s ease-in-out infinite"
 	></div>
 	<div class="animate-enter relative flex flex-col gap-2.5">
 		<p class="tracking-[0.14em] text-fg-2 uppercase">{data.greeting}</p>
diff --git a/web-player/src/routes/layout.css b/web-player/src/routes/layout.css
index a820177..669e6a9 100644
--- a/web-player/src/routes/layout.css
+++ b/web-player/src/routes/layout.css
@@ -2,7 +2,6 @@
 
 @theme {
 	--font-sans: 'Inter Variable', ui-sans-serif, system-ui, sans-serif;
-	--color-neutral-950: #08080a;
 
 	--color-bg: var(--mf-bg);
 	--color-elevated: var(--mf-elevated);
@@ -18,8 +17,10 @@
 	--color-fg-3: var(--mf-text-3);
 	--color-muted: var(--mf-text-4);
 	--color-accent: var(--mf-accent);
-	--color-accent-soft: var(--mf-accent-60);
-	--color-on-accent: #ffffff;
+	--color-accent-soft: var(--mf-accent-soft);
+	--color-on-accent: var(--mf-on-art);
+	--color-scrim: var(--mf-scrim);
+	--color-on-art: var(--mf-on-art);
 	--color-danger: oklch(63.7% 0.237 25.331);
 	--color-danger-fg: oklch(88.5% 0.062 18.334);
 
diff --git a/web-player/src/routes/login/+page.svelte b/web-player/src/routes/login/+page.svelte
index 77560aa..165662c 100644
--- a/web-player/src/routes/login/+page.svelte
+++ b/web-player/src/routes/login/+page.svelte
@@ -12,7 +12,7 @@
 </svelte:head>
 
 <div class="grid min-h-screen place-items-center bg-bg px-6 text-fg">
-	<div class="flex w-full max-w-[440px] flex-col items-center gap-9 text-center">
+	<div class="flex w-full max-w-110 flex-col items-center gap-9 text-center">
 		<div class="text-3xl font-extrabold tracking-tight">Musify</div>
 
 		<div>