.compare-container {
  position: relative;
  z-index: 0;
  isolation: isolate;
  display: inline-block;
  overflow: hidden;
  cursor: ew-resize;
  user-select: none;
  max-width: 100%;
  transition: transform 0.2s ease;
}

.compare-container > img,
.compare-top img {
  display: block;
  width: 100%;
  height: auto;
}

.compare-top {
  position: absolute;
  inset: 0;
  overflow: hidden;
  clip-path: inset(0 0 0 50%);
}

.compare-line {
  position: absolute;
  top: 0;
  width: 2px;
  background: white;
  z-index: 9;
  transform: translateX(-50%);
  box-shadow: 0 0 6px rgba(0,0,0,0.5);
}

.compare-slider {
  position: absolute;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(0,0,0,0.5);
  z-index: 10;
  cursor: ew-resize;
  touch-action: none;
  transform: translate(-50%, -50%);
}

.compare-caption {
  position: absolute;
  bottom: 10px;
  padding: 4px 8px;
  background: rgba(0,0,0,0.6);
  color: white;
  font-size: clamp(0.45rem, 1.8vw, 1rem);
  border-radius: 4px;
  pointer-events: none;
  user-select: none;
  transition: opacity 0.25s ease, font-size 0.2s ease;
  max-width: 45%;
  word-break: break-word;
}
.compare-caption.before { left: 10px; }
.compare-caption.after { right: 10px; }

@media (max-width: 600px) {
  .compare-caption { font-size: clamp(0.4rem, 3vw, 0.75rem); max-width: 60%; }
}

.compare-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.compare-container.is-fullscreen {
  display: block;
  position: relative;
  max-width: 95vw;
  max-height: calc(var(--vh, 1vh) * 95);
  overflow: hidden;
  --fs-ui-size: clamp(0.8rem, 1.2vw, 1.4rem);
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

.compare-container.is-fullscreen > img,
.compare-container.is-fullscreen .compare-top img {
  max-width: 95vw;
  max-height: calc(var(--vh, 1vh) * 95);
  width: auto;
  height: auto;
}

.compare-container.is-fullscreen .compare-top { inset: 0; position: absolute; }

.compare-container.is-fullscreen .compare-caption {
  font-size: var(--fs-ui-size);
  padding: calc(var(--fs-ui-size) * 0.35) calc(var(--fs-ui-size) * 0.7);
  max-width: 40%;
}

.compare-fullscreen-btn {
  position: absolute;
  top: 0.5em;
  right: 0.5em;
  font-size: 1em;
  padding: 0.3em 0.5em;
  background: rgba(0,0,0,0.6);
  color: white;
  border: none;
  border-radius: 0.3em;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, font-size 0.2s ease, padding 0.2s ease;
}

/* Show button on hover for non-touch devices */
.compare-container:hover .compare-fullscreen-btn {
  opacity: 1;
  pointer-events: auto;
}

/* Fullscreen button scaling in fullscreen mode */
.compare-container.is-fullscreen .compare-fullscreen-btn {
  font-size: var(--fs-ui-size);
  padding: calc(var(--fs-ui-size) * 0.35)
           calc(var(--fs-ui-size) * 0.6);
  opacity: 1;
  pointer-events: auto;
}

/* Always show fullscreen button on touch devices */
@media (hover: none) {
  .compare-fullscreen-btn {
    opacity: 1 !important;
    pointer-events: auto !important;
  }
}