/*--------------------------------------------------------------
# Machinery Scroll Showcase (about-us page)
# All selectors are prefixed with "mx-" so nothing in main.css is affected.
--------------------------------------------------------------*/
.mx-section {
  --mx-top: 132px;
  --mx-step: 42vh;
  --mx-stage-height: min(calc(100vh - var(--mx-top) - 24px), 720px);
  --mx-border: #e3eaf1;
  --mx-muted: #6b7782;
  --mx-ink: #17202a;
  background-color: #f8fbfc;
  padding-top: 4rem;
}

.mx-heading {
  text-align: center;
  margin-bottom: 2.5rem;
}

/* The track is tall; the stage inside sticks while the user scrolls through it */
.mx-track {
  position: relative;
  height: calc(var(--mx-stage-height) + var(--mx-count, 15) * var(--mx-step));
}

.mx-stage {
  position: sticky;
  top: var(--mx-top);
  height: var(--mx-stage-height);
  min-height: 460px;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 1.75rem;
  align-items: stretch;
}

/* ---------- Left: list viewport ---------- */
.mx-list-viewport {
  position: relative;
  overflow: hidden;
  min-height: 0;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 9%, #000 91%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0, #000 9%, #000 91%, transparent 100%);
}

.mx-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform 0.6s cubic-bezier(0.22, 0.8, 0.28, 1);
  will-change: transform;
}

.mx-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: 1rem 1.15rem;
  text-align: left;
  font: inherit;
  color: inherit;
  background: #fff;
  border: 1px solid var(--mx-border);
  border-radius: 14px;
  cursor: pointer;
  opacity: 0.62;
  transform: scale(0.97);
  transform-origin: left center;
  transition: opacity 0.4s ease, transform 0.4s ease, background-color 0.4s ease,
    border-color 0.4s ease, box-shadow 0.4s ease;
}

.mx-item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 4px;
  border-radius: 14px 0 0 14px;
  background: var(--accent-color);
  transform: scaleY(0);
  transition: transform 0.4s ease;
}

.mx-item:hover {
  opacity: 0.9;
}

.mx-item:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.mx-item.is-active {
  opacity: 1;
  transform: scale(1);
  background: #f8fbff;
  border-color: color-mix(in srgb, var(--accent-color), transparent 65%);
  box-shadow: 0 10px 28px rgba(16, 107, 167, 0.1);
}

.mx-item.is-active::before {
  transform: scaleY(1);
}

.mx-item-icon {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 1.15rem;
  color: var(--accent-color);
  background: color-mix(in srgb, var(--accent-color), transparent 90%);
  transition: background-color 0.4s ease, color 0.4s ease;
}

.mx-item.is-active .mx-item-icon {
  color: #fff;
  background: var(--accent-color);
}

.mx-item-body {
  flex: 1 1 auto;
  min-width: 0;
}

.mx-item-title {
  display: block;
  font-family: var(--nav-font);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--mx-ink);
}

.mx-item-desc {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--mx-muted);
}

.mx-item-chevron {
  flex: 0 0 auto;
  font-size: 0.95rem;
  color: var(--accent-color);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.mx-item.is-active .mx-item-chevron {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- Right: detail panel ---------- */
.mx-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 2rem 2rem 1.5rem;
  background: #fff;
  border: 1px solid var(--mx-border);
  border-radius: 20px;
  box-shadow: 0 8px 30px rgba(16, 33, 52, 0.04);
}

.mx-panel-head {
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.mx-panel-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.mx-tag {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  font-family: var(--nav-font);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-color);
  background: color-mix(in srgb, var(--accent-color), transparent 90%);
  border-radius: 999px;
}

.mx-counter {
  font-family: var(--nav-font);
  font-size: 0.85rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--mx-muted);
}

.mx-panel-title {
  margin: 0 0 0.4rem;
  font-family: var(--nav-font);
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--mx-ink);
  text-wrap: balance;
}

.mx-panel-desc {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--mx-muted);
  text-wrap: pretty;
}

.mx-panel.is-changing .mx-panel-head {
  opacity: 0;
  transform: translateY(8px);
}

.mx-photo-frame {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  margin-top: 1.5rem;
  overflow: hidden;
  border-radius: 14px;
  background: #e9eff4;
}

.mx-photo {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  color: #8a99a6;
  background: linear-gradient(135deg, #eef3f7 0%, #dfe8ef 100%);
  opacity: 0;
  transform: scale(1.03);
  transition: opacity 0.55s ease, transform 0.8s ease;
}

.mx-photo.is-active {
  opacity: 1;
  transform: scale(1);
}

.mx-photo > i {
  font-size: 3rem;
  line-height: 1;
}

.mx-photo-label {
  font-family: var(--nav-font);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.mx-photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mx-progress {
  height: 3px;
  margin-top: 1.1rem;
  overflow: hidden;
  background: #e9eff4;
  border-radius: 3px;
}

.mx-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent-color);
  border-radius: 3px;
  transition: width 0.5s ease;
}

/* ---------- Tablet / mobile: image on top, list below ---------- */
@media (max-width: 991.98px) {
  .mx-section {
    --mx-top: 96px;
    --mx-step: 36vh;
    --mx-stage-height: calc(100vh - var(--mx-top) - 12px);
    padding-top: 3rem;
  }

  .mx-stage {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(0, 0.95fr) minmax(0, 1fr);
    gap: 1rem;
    min-height: 0;
  }

  .mx-panel {
    order: -1;
    padding: 1rem 1.1rem 0.9rem;
    border-radius: 16px;
  }

  .mx-panel-title {
    font-size: 1.15rem;
  }

  .mx-panel-desc {
    display: none;
  }

  .mx-photo-frame {
    margin-top: 0.8rem;
  }

  .mx-progress {
    margin-top: 0.8rem;
  }

  .mx-item {
    padding: 0.75rem 0.9rem;
  }

  .mx-item-desc {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mx-list,
  .mx-item,
  .mx-item::before,
  .mx-item-chevron,
  .mx-photo,
  .mx-panel-head,
  .mx-progress-bar {
    transition: none;
  }
}