/* ==========================================================================
   TPS Empire - Scroll-Driven Strategic Work Accordion & Image Showcase
   Matches reference video: Left Sticky Accordion with Orange Indicator
   Right: Synced Image Cross-Fade Frame | Pure Vanilla CSS & JS
   ========================================================================== */

/* Main Section Track Wrapper */
.tps-strategic-work-section {
  position: relative;
  width: 100%;
  background-color: #fff6ee;
  background-image: 
    linear-gradient(to right, rgba(234, 88, 12, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(234, 88, 12, 0.07) 1px, transparent 1px);
  background-size: 32px 32px;
  padding: 0;
  margin: 0;
  z-index: 12;
}

/* Extended Scroll Runway (Drives smooth step-by-step accordion progression) */
.tps-strategic-work-track {
  position: relative;
  width: 100%;
  height: 380vh;
}

/* Sticky Viewport (Locks in screen center during scroll) */
.tps-strategic-work-viewport {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #fff6ee;
  background-image: 
    linear-gradient(to right, rgba(234, 88, 12, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(234, 88, 12, 0.07) 1px, transparent 1px);
  background-size: 32px 32px;
  box-sizing: border-box;
}

/* Main Two-Column Container */
.tps-strategic-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 56px;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   Left Column: Heading & Interactive Step Accordion
   -------------------------------------------------------------------------- */
.tps-strategic-accordion-col {
  flex: 0 0 45%;
  max-width: 45%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  z-index: 10;
}

.tps-strategic-heading {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: #1a1a2e;
  margin: 0 0 28px 0;
}

.tps-strategic-heading span {
  color: #323edd;
  font-weight: 800;
}

/* Vertical Accordion List */
.tps-strategic-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 0;
}

/* Individual Accordion Item */
.tps-accordion-item {
  position: relative;
  padding: 14px 18px 14px 22px;
  border-left: 3px solid rgba(0, 0, 0, 0.08);
  border-radius: 0 4px 4px 0;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.3s ease, background-color 0.3s ease, transform 0.25s ease;
  user-select: none;
}

.tps-accordion-item:hover {
  background: rgba(50, 62, 221, 0.03);
}

/* Active State with Orange/Amber Line (Matches Reference Video) */
.tps-accordion-item.is-active {
  border-left-color: #ffa41b;
  background: rgba(255, 164, 27, 0.04);
}

/* Item Header */
.tps-accordion-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.tps-accordion-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.04);
  color: #64748b;
  border-radius: 50%;
  font-size: 14px;
  transition: all 0.3s ease;
}

.tps-accordion-item.is-active .tps-accordion-icon {
  background: #ffa41b;
  color: #05091f;
  transform: scale(1.08);
}

.tps-accordion-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: #64748b;
  margin: 0;
  transition: color 0.3s ease;
}

.tps-accordion-item.is-active .tps-accordion-title {
  color: #1a1a2e;
  font-weight: 800;
}

/* Collapsible / Expandable Description Body */
.tps-accordion-body {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  padding-left: 46px;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.35s ease, margin-top 0.35s ease;
}

.tps-accordion-item.is-active .tps-accordion-body {
  max-height: 110px;
  opacity: 1;
  margin-top: 8px;
}

.tps-accordion-desc {
  font-size: 13.5px;
  line-height: 1.6;
  color: #64748b;
  margin: 0;
}

/* --------------------------------------------------------------------------
   Right Column: Synced Cross-Fade Image Stage (Matches Reference Video)
   -------------------------------------------------------------------------- */
.tps-strategic-image-col {
  flex: 0 0 50%;
  max-width: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tps-strategic-image-frame {
  position: relative;
  width: 100%;
  height: 440px;
  border-radius: 8px;
  overflow: hidden;
  background: #f1f5f9;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.12);
}

/* Individual Image Layers */
.tps-strategic-image-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transform: scale(1.04);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.5s ease;
  pointer-events: none;
}

.tps-strategic-image-layer.is-active {
  opacity: 1;
  visibility: visible;
  transform: scale(1.0);
  pointer-events: auto;
}

.tps-strategic-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* Category Badge Overlaid on Image */
.tps-image-tag {
  position: absolute;
  top: 18px;
  left: 18px;
  background: rgba(9, 15, 53, 0.85);
  color: #ffffff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 6px 14px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  z-index: 2;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* --------------------------------------------------------------------------
   Responsive Layout
   -------------------------------------------------------------------------- */
@media (max-width: 991.98px) {
  .tps-strategic-work-track {
    height: auto;
  }

  .tps-strategic-work-viewport {
    position: static;
    height: auto;
    padding: 70px 0 80px;
  }

  .tps-strategic-container {
    flex-direction: column;
    gap: 40px;
  }

  .tps-strategic-accordion-col {
    flex: 1 1 100%;
    max-width: 100%;
  }

  .tps-strategic-heading {
    font-size: 32px;
    text-align: center;
  }

  .tps-strategic-actions {
    justify-content: center;
  }

  .tps-strategic-image-col {
    flex: 1 1 100%;
    max-width: 100%;
    width: 100%;
  }

  .tps-strategic-image-frame {
    height: 320px;
  }
}

@media (max-width: 640px) {
  .tps-strategic-heading {
    font-size: 26px;
    margin-bottom: 20px;
  }

  .tps-accordion-item {
    padding: 12px 14px 12px 16px;
  }

  .tps-accordion-title {
    font-size: 16px;
  }

  .tps-accordion-body {
    padding-left: 0;
  }

  .tps-accordion-desc {
    font-size: 12.5px;
  }

  .tps-strategic-image-frame {
    height: 250px;
  }

  .tps-strategic-actions {
    flex-direction: column;
    width: 100%;
  }

  .tps-strategic-btn,
  .tps-strategic-btn-outline {
    width: 100%;
    text-align: center;
  }
}