Add party player: YouTube queue with crossfading playback
Two frontends sharing one WebSocket-backed state on the server: - Player: fullscreen poster background with a small frame (30% of the screen) that drifts diagonally and reflects off the edges. Two stacked YouTube players hand over with a 5s equal-power crossfade so there is never silence between tracks. - Queue: add by URL, drag to reorder, delete, click to jump. Shows title and length per item, highlights what is playing, and tracks remaining vs. total playtime. No API key is required — titles come from YouTube's oEmbed endpoint and durations from a hidden muted probe player that cues each new video just to read its length. The fade is driven by both requestAnimationFrame and the interval tick: a hidden or throttled tab stops serving frames entirely, which would otherwise strand a handover half-faded with two tracks audible. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Tg15tLAuT6NrCE1ZxKVgDB
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:root {
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--accent: #ff4fc3;
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--ink: #14060f;
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--panel: #1f0c1a;
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--panel-2: #2a1124;
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--text: #f7e9f3;
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--muted: #a8859c;
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}
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* {
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box-sizing: border-box;
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}
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body {
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margin: 0 auto;
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padding: 24px 20px 60px;
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max-width: 720px;
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background: var(--ink);
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color: var(--text);
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font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
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-webkit-tap-highlight-color: transparent;
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}
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header {
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display: flex;
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align-items: baseline;
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justify-content: space-between;
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gap: 16px;
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margin-bottom: 20px;
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}
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h1 {
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margin: 0;
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font-size: 1.8rem;
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letter-spacing: -0.02em;
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color: var(--accent);
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}
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#status {
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font-size: 0.7rem;
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letter-spacing: 0.12em;
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text-transform: uppercase;
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color: var(--muted);
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}
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#status.offline {
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color: #ff8a5c;
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}
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#status.online::before {
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content: "";
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display: inline-block;
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width: 7px;
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height: 7px;
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margin-right: 6px;
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border-radius: 50%;
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background: #55e08a;
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}
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/* --- add form ----------------------------------------------------------- */
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#add-form {
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display: flex;
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gap: 8px;
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}
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#url {
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flex: 1;
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min-width: 0;
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font: inherit;
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padding: 12px 14px;
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border-radius: 10px;
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border: 1px solid #43213a;
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background: var(--panel);
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color: var(--text);
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}
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#url:focus {
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outline: 2px solid var(--accent);
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outline-offset: 1px;
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}
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#add-form button {
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font: inherit;
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font-weight: 700;
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padding: 12px 24px;
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border: 0;
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border-radius: 10px;
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background: var(--accent);
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color: var(--ink);
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cursor: pointer;
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}
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#error {
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margin: 10px 2px 0;
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color: #ff8a5c;
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font-size: 0.9rem;
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}
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/* --- totals ------------------------------------------------------------- */
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#totals {
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display: flex;
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gap: 10px;
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margin: 22px 0 12px;
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}
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.total {
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flex: 1;
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padding: 12px 14px;
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border-radius: 10px;
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background: var(--panel);
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border: 1px solid #37172f;
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}
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.label {
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display: block;
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font-size: 0.68rem;
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letter-spacing: 0.14em;
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text-transform: uppercase;
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color: var(--muted);
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}
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.value {
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display: block;
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margin-top: 4px;
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font-size: 1.5rem;
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font-variant-numeric: tabular-nums;
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font-weight: 600;
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}
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/* --- list --------------------------------------------------------------- */
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#list {
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list-style: none;
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margin: 0;
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padding: 0;
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display: flex;
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flex-direction: column;
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gap: 6px;
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}
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.item {
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display: flex;
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align-items: center;
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gap: 10px;
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padding: 10px 12px;
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border-radius: 10px;
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background: var(--panel);
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border: 1px solid transparent;
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cursor: pointer;
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}
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.item.current {
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background: var(--panel-2);
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border-color: var(--accent);
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box-shadow: 0 0 0 1px rgba(255, 79, 195, 0.35);
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}
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.item.dragging {
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opacity: 0.35;
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}
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.item.drop-before {
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border-top-color: var(--accent);
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box-shadow: 0 -2px 0 var(--accent);
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}
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.item.drop-after {
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border-bottom-color: var(--accent);
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box-shadow: 0 2px 0 var(--accent);
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}
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.handle {
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flex: none;
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cursor: grab;
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color: var(--muted);
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padding: 0 2px;
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font-size: 1.1rem;
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line-height: 1;
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user-select: none;
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}
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.index {
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flex: none;
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width: 1.6em;
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text-align: right;
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color: var(--muted);
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font-variant-numeric: tabular-nums;
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font-size: 0.85rem;
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}
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.item.current .index {
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color: var(--accent);
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}
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.title {
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flex: 1;
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min-width: 0;
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overflow: hidden;
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text-overflow: ellipsis;
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white-space: nowrap;
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}
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.duration {
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flex: none;
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color: var(--muted);
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font-variant-numeric: tabular-nums;
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font-size: 0.9rem;
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}
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.remove {
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flex: none;
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border: 0;
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background: transparent;
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color: var(--muted);
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font: inherit;
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font-size: 1.2rem;
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line-height: 1;
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padding: 2px 6px;
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border-radius: 6px;
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cursor: pointer;
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}
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.remove:hover {
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background: #46203c;
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color: #ff8a5c;
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}
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#empty {
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color: var(--muted);
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text-align: center;
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padding: 30px 0;
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}
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/* --- footer ------------------------------------------------------------- */
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footer {
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margin-top: 32px;
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padding-top: 18px;
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border-top: 1px solid #331630;
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}
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#backgrounds {
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display: flex;
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gap: 8px;
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margin-top: 8px;
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}
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#backgrounds button {
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font: inherit;
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padding: 8px 18px;
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border-radius: 999px;
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border: 1px solid #43213a;
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background: var(--panel);
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color: var(--text);
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cursor: pointer;
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}
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#backgrounds button.active {
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background: var(--accent);
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border-color: var(--accent);
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color: var(--ink);
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font-weight: 600;
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}
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