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var(--duration-fast)}.background-music-player__timeline{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px}.background-music-player__seek{display:block;width:100%;min-width:0;height:20px;margin:0;padding:0;border:0;border-radius:3px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;color:var(--theme-body);cursor:pointer}.background-music-player__seek::-webkit-slider-runnable-track{height:2px;border-radius:2px;background:linear-gradient(to right,var(--music-progress-color) var(--music-progress),var(--music-track) 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var(--theme-muted));font-size:12px;line-height:16px;font-variant-numeric:tabular-nums;white-space:nowrap}@media(pointer:fine){.background-music-player__toggle{width:32px;height:32px}}@media(prefers-reduced-motion:reduce){.background-music-player__toggle-face{transition:none}}.opening-motion-root{--opening-serif: "Noto Serif KR", "Nanum Myeongjo", Georgia, serif;--opening-hand: "Gaegu", var(--invitation-fixed-font-body);position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;color:#222;font-family:var(--invitation-fixed-font-body);line-height:1.4;-webkit-user-select:none;-moz-user-select:none;user-select:none;word-break:keep-all}.opening-motion-root svg{overflow:visible}.opening-motion-grain{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' 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