/* ==========================================================================
   Slider Carousel
   ==========================================================================
   A discrete-step slider that crossfades through up to 10 images.
   The knob snaps to tick marks on release and grows / fades on press
   so the user can peek behind it.

   Usage:
     <div class="slider-carousel" data-label-start="lofi" data-label-end="hifi">
       <div class="soft-inner-shadow">
         <img src="a.webp" alt="..." />
         <img src="b.webp" alt="..." />
       </div>
     </div>
   ========================================================================== */

/* --- Container ---------------------------------------------------------- */
.slider-carousel {
  position: relative;
  margin: 12px auto 37px;
  width: 94%;
  max-width: 800px;
}

.slider-carousel > .soft-inner-shadow {
  margin: 0;
  width: 100%;
  background-color: #ebebf0;
}

/* --- Slide stacking (after JS init) ------------------------------------- */
.slider-carousel-initialized .soft-inner-shadow img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  z-index: 0;
}

/* First child is position-relative so the container has intrinsic height */
.slider-carousel-initialized .soft-inner-shadow img:first-child {
  position: relative;
  height: auto;
}

/* Only promote transitioning slides to the compositor */
.slider-carousel-initialized .soft-inner-shadow img.slider-outgoing {
  opacity: 1;
  z-index: 1;
  transition: opacity 0.45s ease;
  will-change: opacity;
}

.slider-carousel-initialized .soft-inner-shadow img.slider-active {
  opacity: 1;
  z-index: 2;
  transition: opacity 0.45s ease;
  will-change: opacity;
}

/* --- Controls bar ------------------------------------------------------- */
.slider-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  user-select: none;
  -webkit-user-select: none;
}

/* Labels (lofi / hifi) */
.slider-label {
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: rgba(0, 0, 0, 0.45);
  flex-shrink: 0;
  white-space: nowrap;
  letter-spacing: 3px;
}

/* --- Outer pill (visual container around track) ------------------------- */
.slider-pill {
  position: relative;
  flex: 1;
  max-width: 200px;
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 100px;
  padding: 0px 16px;
}

/* --- Track -------------------------------------------------------------- */
.slider-track-wrap {
  position: relative;
  flex: 1;
  height: 28px;
  display: flex;
  align-items: center;
}

.slider-track {
  position: relative;
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.12);
  border-radius: 10px;
}

/* --- Tick marks --------------------------------------------------------- */
.slider-tick {
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.18);
  transform: translate(-50%, -50%);
  pointer-events: none;
  transition: background 0.2s ease;
}

.slider-tick.slider-tick--active {
  background: rgba(0, 0, 0, 0.45);
}

/* --- Knob --------------------------------------------------------------- */
.slider-knob {
  position: absolute;
  top: 50%;
  left: 0;
  width: 20px;
  height: 14px;
  border-radius: 7px;
  background: rgba(0, 0, 0, 0.35);
  transform: translate(-50%, -50%);
  z-index: 2;
  transition:
    left 0.25s cubic-bezier(0.4, 0, 0.2, 1),
    background 0.15s ease,
    opacity 0.15s ease,
    transform 0.15s ease;
  touch-action: none;
  will-change: transform;
}

.slider-knob:hover {
  background: rgba(0, 0, 0, 0.45);
}

/* Pressed state: scale up, semi-transparent so user can peek behind */
.slider-knob.slider-knob--active {
  transform: translate(-50%, -50%) scale(1.3);
  opacity: 0.5;
  transition:
    background 0.15s ease,
    opacity 0.15s ease,
    transform 0.15s ease;
}

/* ==========================================================================
   Dark Mode
   ========================================================================== */
@media (prefers-color-scheme: dark) {
  .slider-label {
    color: rgba(255, 255, 255, 0.4);
  }
  .slider-pill {
    background: rgba(255, 255, 255, 0.08);
  }
  .slider-track {
    background: #585859;
  }
  .slider-tick {
    background: #585859;
  }
  .slider-tick.slider-tick--active {
    background: rgba(255, 255, 255, 0.55);
  }
  .slider-knob {
    background: rgb(137, 137, 137);
  }
  .slider-knob:hover {
    background: rgba(137, 137, 137, 0.65);
  }
  .slider-knob.slider-knob--active {
    opacity: 0.5;
  }
}

/* ==========================================================================
   Mobile
   ========================================================================== */
@media screen and (max-width: 720px) {
  .slider-carousel {
    width: 100%;
  }
  .slider-pill {
    padding: 10px 14px;
  }
  .slider-label {
    font-size: 12px;
  }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  .slider-carousel-initialized .soft-inner-shadow img.slider-active,
  .slider-carousel-initialized .soft-inner-shadow img.slider-outgoing {
    transition-duration: 0.05s;
  }
  .slider-knob {
    transition-duration: 0.05s;
  }
}