/* -------------------------------------- */
/* 1. Main Song Container (Desktop Grid / Mobile Flex) */
/* -------------------------------------- */

.song-comparison-wrapper {
  max-width: 1512px;
  margin: 0 auto;
  padding: var(--card-section-spacing-mobile) var(--container-padding-mobile);
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: var(--card-section-spacing-mobile);
  overflow-x: hidden;
}

/* Desktop Layout (Grid) */
@media (min-width: 1024px) {
  .song-comparison-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto 1fr;
    gap: var(--card-section-spacing-desktop);
    padding: var(--container-padding-desktop);
  }
}

/* -------------------------------------- */
/* 2. Top Headers (Desktop-Only) */
/* -------------------------------------- */

.song-header-row {
  display: none;
  font-size: var(--font-size-subheading-mobile);
  font-weight: bold;
  color: var(--text-color-light);
  padding-bottom: var(--base-grid-unit-mobile);
  border-bottom: 1px solid var(--border-color);
}

@media (min-width: 1024px) {
  .song-header-row {
    display: block;
    text-align: center;
    grid-column: 1 / 2;
    padding-bottom: var(--base-grid-unit-desktop);
  }
  .song-header-row.translated {
    grid-column: 2 / 3;
  }
}

/* -------------------------------------- */
/* 3. Mobile Viewport & Sliding Panels */
/* -------------------------------------- */

/* Clipping / viewport for sliding track */
.song-viewport {
  flex-grow: 1;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

/* Mobile: the sliding track that contains both panels */
.song-panels {
  display: flex;
  flex-direction: row;
  height: 100%;
  width: 200%;  
  transition: transform 0.4s ease-in-out;
}

 .song-panels.original-active { transform: translateX(0); }
.song-panels.translated-active { transform: translateX(-50%); }

@media (min-width: 1024px) {
  .song-viewport { display: contents; overflow: visible; }
  .song-panels { display: contents; width: auto; transform: none; }
   .song-panels.original-active,
  .song-panels.translated-active { transform: none; }
}

/* -------------------------------------- */
/* 3.1 The Individual Panels (shared rules) */
/* -------------------------------------- */

.song-text-panel {
  flex-shrink: 0;
   flex-basis: 50%;
  overflow: hidden;  
  box-sizing: border-box;
  background: var(--card-bg);
  border-radius: 8px;
  padding: var(--container-padding-mobile);
  height: 100%;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-color);
}

 @media (min-width: 1024px) {
  .song-text-panel {
     flex: none;
    height: auto;
    padding: var(--container-padding-desktop);
    grid-row: 2 / 3;
    overflow: hidden; 
  }

  .song-text-panel.original { grid-column: 1 / 2; }
  .song-text-panel.translated { grid-column: 2 / 3; }
}

/* -------------------------------------- */
/* 3.2 Scrollable content area inside each panel (both mobile + desktop) */
/* -------------------------------------- */

.song-text-content {
   box-sizing: border-box;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;  
  flex: 1 1 auto; 
  line-height: 1.6;
  font-size: var(--font-size-normal);
  white-space: pre-wrap;
  word-wrap: break-word;
  padding-right: var(--base-grid-unit-mobile);
  text-align: center;
}

 @media (max-width: 1023px) {
  .song-text-panel {
    height: 65vh;  
  }
  .song-text-content { height: 100%; }
}

@media (min-width: 1024px) {
  .song-text-panel {
    max-height: 75vh; 
  }
  .song-text-content { height: 100%; }
}

 .song-text-content::-webkit-scrollbar { width: 8px; height: 8px; }
.song-text-content::-webkit-scrollbar-thumb { border-radius: 6px; opacity: .6; }

/* -------------------------------------- */
/* 4. Mobile Switcher Controls */
/* -------------------------------------- */

.song-switcher {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--base-grid-unit-mobile) 0;
  background-color: var(--background-color);
  z-index: 10;
}

@media (min-width: 1024px) {
  .song-switcher { display: none; }
}

/* Button styles */
.song-switch-button {
  display: flex;
  align-items: center;
  padding: var(--button-padding-vertical) var(--button-padding-horizontal);
  min-height: var(--button-min-tappable-area);
  border-radius: 6px;
  background-color: var(--button-bg);
  color: var(--button-text-color);
  cursor: pointer;
  font-size: var(--font-size-cta-mobile);
  font-weight: 600;
  transition: background-color 0.3s;
  border: 1px solid var(--button-border);
}

.song-current-view {
  font-size: var(--font-size-subheading-mobile);
  font-weight: 700;
  color: var(--accent-color);
}

.arrow-left { margin-right: var(--base-grid-unit-mobile); }
.arrow-right { margin-left: var(--base-grid-unit-mobile); }