/* ============================================================
   PROGRESS SLIDER
   4-stage draggable cleaning-progress reveal component.
   Used in the Recent Work section. Fits the same footprint
   as .work-card. Reusable: create a new <article class="progress-slider">
   with different data-label-N attributes and different <img> srcs.
   ============================================================ */


/* ── Outer wrapper ── */
.progress-slider {
  position: relative;
  display: flex;
  flex-direction: column;
}


/* ── Image stack frame (4:5 ratio, rounded top corners) ── */
.progress-slider__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-panel) var(--radius-panel) 0 0;
  border: 1px solid var(--color-hairline);
  border-bottom: none;
  overflow: hidden;
  background: var(--color-panel);
  transition:
    background-color var(--duration-theme) var(--ease-out),
    border-color var(--duration-theme) var(--ease-out);
}


/* ── The 4 stacked image layers — all full-size, opacity-blended ──
   position:absolute + inset:0 + explicit object-position ensures every
   layer is anchored to the full frame, not relative to any clip wrapper */
.progress-slider__layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  will-change: opacity;
  z-index: 1;
  /* No CSS transition — JS drives opacity directly so there's no lag */
}


/* ── Bottom controls bar (rounded bottom corners, no top border) ── */
.progress-slider__controls {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.875rem 1rem 0.9rem;
  background: var(--color-panel);
  border: 1px solid var(--color-hairline);
  border-top: none;
  border-radius: 0 0 var(--radius-panel) var(--radius-panel);
  transition:
    background-color var(--duration-theme) var(--ease-out),
    border-color var(--duration-theme) var(--ease-out);
}


/* ── Live status label ── */
.progress-slider__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: none;
  color: var(--color-accent);
  line-height: 1;
  min-height: 0.6875rem;
  transition: color var(--duration-theme) var(--ease-out);
}


/* ── Horizontal drag track ── */
.progress-slider__track {
  position: relative;
  height: 3px;
  background: var(--color-hairline);
  border-radius: 2px;
  cursor: pointer;
  /* Vertical margin gives the handle room to overflow without clipping */
  margin: 14px 0 2px;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}


/* ── Accent-coloured fill, grows left → right as handle moves ── */
.progress-slider__fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  border-radius: 2px;
  pointer-events: none;
  transition: background-color var(--duration-theme) var(--ease-out);
}


/* ── Draggable handle — centred on the track position ── */
.progress-slider__handle {
  position: absolute;
  top: 50%;
  left: 0%;
  width: 30px;
  height: 30px;
  /* translate(-50%, -50%) keeps the handle's centre on the track position */
  transform: translate(-50%, -50%);
  background: var(--color-accent);
  border-radius: 50%;
  border: none;
  padding: 0;
  cursor: grab;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.5),
    0 0 0 3px var(--color-blue-border);
  transition:
    background-color var(--duration-theme) var(--ease-out),
    box-shadow 0.15s var(--ease-out);
  z-index: 2;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}

.progress-slider__handle:hover {
  box-shadow:
    0 3px 10px rgba(0, 0, 0, 0.5),
    0 0 0 5px var(--color-blue-border);
}

/* Active / dragging state */
.progress-slider.is-dragging .progress-slider__handle,
.progress-slider__handle:active {
  cursor: grabbing;
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.5),
    0 0 0 6px var(--color-blue-border);
}

.progress-slider__handle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Bidirectional arrow icon inside the handle */
.progress-slider__handle svg {
  width: 13px;
  height: 13px;
  color: #fff;
  pointer-events: none;
  flex-shrink: 0;
}


/* ── Reduced motion: kill any transitions ── */
@media (prefers-reduced-motion: reduce) {
  .progress-slider__handle,
  .progress-slider__fill {
    transition: none;
  }
}


/* ── Responsive: mobile ── */
@media (max-width: 768px) {
  .progress-slider__controls {
    padding: 0.75rem 0.875rem 0.8rem;
  }

  .progress-slider__label {
    font-size: 0.8125rem;
    min-height: 1rem;
  }

  .progress-slider__track {
    height: 6px;
    margin: 20px 0 4px;
  }

  .progress-slider__handle {
    width: 44px;
    height: 44px;
  }

  .progress-slider__handle svg {
    width: 15px;
    height: 15px;
  }
}