Use flex gap instead of line height for lyrics

src/renderer/features/lyrics/lyric-line.tsx

@@ -10,7 +10,6 @@ const StyledText = styled(TextTitle)`
   color: var(--main-fg);
   font-weight: 400;
   font-size: 2.5vmax;
-  line-height: 1.5;
   transform: scale(0.95);
   opacity: 0.5;
 

src/renderer/features/lyrics/synchronized-lyrics.tsx

@@ -16,6 +16,9 @@ import styled from 'styled-components';
 const mpvPlayer = isElectron() ? window.electron.mpvPlayer : null;
 
 const SynchronizedLyricsContainer = styled.div`
+  display: flex;
+  flex-direction: column;
+  gap: 2rem;
   width: 100%;
   height: 100%;
   padding: 10vh 0 6vh;

src/renderer/features/lyrics/unsynchronized-lyrics.tsx

@@ -8,6 +8,9 @@ interface UnsynchronizedLyricsProps extends Omit<FullLyricsMetadata, 'lyrics'> {
 }
 
 const UnsynchronizedLyricsContainer = styled.div`
+  display: flex;
+  flex-direction: column;
+  gap: 2rem;
   width: 100%;
   height: 100%;
   padding: 10vh 0 6vh;