/* =====================================================
   Poka-Yoke Pipeline – Pick-to-Light Animated Flow
   ===================================================== */

/* --- Container --- */
.pk {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #060D18 0%, var(--color-primary) 50%, #060D18 100%);
  padding: var(--space-12) 0 var(--space-10);
}

.pk__header {
  text-align: center;
  margin-bottom: var(--space-10);
  position: relative;
  z-index: 2;
}

/* --- Stages --- */
.pk__stages {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-5);
  position: relative;
  z-index: 2;
}

/* --- Timeline --- */
.pk__timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-8);
  z-index: 2;
}

.pk__timeline::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 5%;
  width: 90%;
  height: 2px;
  background: rgba(255,255,255,0.08);
}

.pk__timeline-progress {
  position: absolute;
  top: 20px;
  left: 5%;
  width: 0%;
  max-width: 90%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-orange), #FFB84D);
  z-index: 1;
  transition: width 1.8s cubic-bezier(.4, 0, .2, 1);
}

/* --- Stage Card --- */
.pk__card {
  background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(40px) scale(0.95);
  transition: opacity 0.7s cubic-bezier(.4,0,.2,1),
              transform 0.7s cubic-bezier(.4,0,.2,1),
              border-color 0.4s ease,
              box-shadow 0.4s ease;
}

.pk__card.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  border-color: rgba(247,148,29,0.3);
  box-shadow: 0 0 40px rgba(247,148,29,0.06), inset 0 1px 0 rgba(255,255,255,0.05);
}

.pk__card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 100%, rgba(247,148,29,0.05), transparent 70%);
  opacity: 0;
  transition: opacity 0.6s ease;
}

.pk__card.active::before { opacity: 1; }

/* Shared label  */
.pk__label {
  font-size: var(--fs-small);
  color: var(--color-accent-orange);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.05em;
  margin-top: var(--space-3);
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.5s 0.3s ease;
}

.pk__card.active .pk__label {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Stage 1: Order/BOM Display ---- */
.pk__bom {
  width: 130px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.pk__bom-header {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 8px;
  background: rgba(247,148,29,0.1);
  font-size: 9px;
  color: var(--color-accent-orange);
  font-weight: var(--fw-bold);
  letter-spacing: 0.03em;
}

.pk__bom-rows {
  padding: 4px 6px;
}

.pk__bom-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 4px;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.35s ease;
}

.pk__card.active .pk__bom-row { opacity: 1; transform: translateX(0); }
.pk__card.active .pk__bom-row:nth-child(1) { transition-delay: 0.15s; }
.pk__card.active .pk__bom-row:nth-child(2) { transition-delay: 0.3s; }
.pk__card.active .pk__bom-row:nth-child(3) { transition-delay: 0.45s; }
.pk__card.active .pk__bom-row:nth-child(4) { transition-delay: 0.6s; }

.pk__bom-part {
  font-size: 9px;
  color: var(--color-text-light);
}

.pk__bom-qty {
  font-size: 9px;
  color: var(--color-white);
  font-weight: var(--fw-semibold);
  background: rgba(255,255,255,0.06);
  padding: 1px 6px;
  border-radius: 3px;
}

/* ---- Stage 2: Scan & Identify ---- */
.pk__scanner {
  width: 100px;
  height: 80px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pk__scanner-beam {
  position: absolute;
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, #F7941D 30%, #FFB84D 50%, #F7941D 70%, transparent 100%);
  opacity: 0;
  filter: blur(0.5px);
  box-shadow: 0 0 12px rgba(247,148,29,0.5);
}

.pk__card.active .pk__scanner-beam {
  animation: pkScanBeam 2s ease-in-out infinite;
  opacity: 1;
}

@keyframes pkScanBeam {
  0%   { top: 10%; opacity: 0; }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { top: 85%; opacity: 0; }
}

.pk__barcode-lines {
  display: flex;
  gap: 2px;
  align-items: flex-end;
  height: 40px;
}

.pk__barcode-line {
  width: 3px;
  background: rgba(255,255,255,0.2);
  border-radius: 1px;
  transition: background 0.3s ease;
}

.pk__card.active .pk__barcode-line {
  background: rgba(255,255,255,0.5);
}

.pk__scan-result {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-2);
  opacity: 0;
  transition: opacity 0.4s 0.8s ease;
}

.pk__card.active .pk__scan-result { opacity: 1; }

.pk__scan-result-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: none;
}

.pk__card.active .pk__scan-result-dot {
  animation: pkPulse 1.5s ease-in-out infinite;
}

@keyframes pkPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.4); }
  50% { box-shadow: 0 0 0 6px rgba(16,185,129,0); }
}

.pk__scan-result-text {
  font-size: 9px;
  color: var(--color-success);
  font-weight: var(--fw-semibold);
}

/* ---- Stage 3: Pick-to-Light Bins ---- */
.pk__bins {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  width: 100%;
  max-width: 140px;
}

.pk__bin {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.03);
  border: 1.5px solid rgba(255,255,255,0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 8px;
  color: var(--color-text-light);
  position: relative;
  transition: all 0.4s ease;
}

.pk__bin-light {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transition: all 0.4s ease;
}

.pk__bin--active {
  border-color: var(--color-success);
  background: rgba(16,185,129,0.06);
}

.pk__bin--active .pk__bin-light {
  background: var(--color-success);
  box-shadow: 0 0 10px rgba(16,185,129,0.6);
  animation: pkLedBlink 1s ease-in-out infinite;
}

@keyframes pkLedBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.pk__bin-label {
  font-size: 7px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.05em;
}

.pk__card.active .pk__bin {
  opacity: 1;
  transform: scale(1);
}

/* Arrow pointing to active bin */
.pk__pick-arrow {
  position: absolute;
  bottom: -2px;
  font-size: 16px;
  color: var(--color-success);
  opacity: 0;
  transition: opacity 0.4s 0.6s ease;
  animation: none;
}

.pk__card.active .pk__pick-arrow {
  opacity: 1;
  animation: pkBounce 1s ease-in-out infinite;
}

@keyframes pkBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* ---- Stage 4: Pick & Confirm ---- */
.pk__confirm {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.pk__hand-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(247,148,29,0.08);
  border: 1.5px solid rgba(247,148,29,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-orange);
  opacity: 0;
  transform: scale(0.6);
  transition: all 0.5s cubic-bezier(.34,1.56,.64,1);
}

.pk__card.active .pk__hand-icon {
  opacity: 1;
  transform: scale(1);
}

.pk__sensor-wave {
  width: 80px;
  height: 20px;
  position: relative;
  overflow: hidden;
}

.pk__sensor-wave-line {
  position: absolute;
  width: 100%;
  height: 2px;
  top: 50%;
  background: linear-gradient(90deg, transparent, var(--color-success), transparent);
  opacity: 0;
}

.pk__card.active .pk__sensor-wave-line {
  animation: pkWave 1.5s ease-in-out infinite;
  opacity: 1;
}

@keyframes pkWave {
  0% { transform: scaleX(0); opacity: 0; }
  50% { transform: scaleX(1); opacity: 1; }
  100% { transform: scaleX(0); opacity: 0; }
}

.pk__confirm-badge {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  font-size: 10px;
  color: var(--color-success);
  font-weight: var(--fw-semibold);
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.4s 0.5s cubic-bezier(.34,1.56,.64,1);
}

.pk__card.active .pk__confirm-badge {
  opacity: 1;
  transform: scale(1);
}

/* ---- Stage 5: Record & Validate ---- */
.pk__record {
  width: 100%;
  max-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.pk__record-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  background: rgba(255,255,255,0.025);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.04);
  opacity: 0;
  transform: translateX(15px);
  transition: all 0.4s ease;
}

.pk__card.active .pk__record-row { opacity: 1; transform: translateX(0); }
.pk__card.active .pk__record-row:nth-child(1) { transition-delay: 0.1s; }
.pk__card.active .pk__record-row:nth-child(2) { transition-delay: 0.25s; }
.pk__card.active .pk__record-row:nth-child(3) { transition-delay: 0.4s; }

.pk__record-icon {
  width: 20px; height: 20px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pk__record-text {
  font-size: 9px;
  color: var(--color-text-light);
  line-height: 1.3;
}

.pk__record-text strong {
  color: var(--color-white);
  font-weight: var(--fw-semibold);
  display: block;
}

.pk__validate-bar {
  margin-top: 4px;
  padding: 5px 8px;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 10px;
  color: var(--color-success);
  font-weight: var(--fw-bold);
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.4s 0.6s ease;
}

.pk__card.active .pk__validate-bar {
  opacity: 1;
  transform: scale(1);
}

/* --- Timeline Step --- */
.pk__step {
  text-align: center;
  position: relative;
  z-index: 2;
}

.pk__step-dot {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  border: 2px solid rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-3);
  font-size: var(--fs-small);
  font-weight: var(--fw-bold);
  color: var(--color-text-light);
  transition: all 0.5s ease;
}

.pk__step.active .pk__step-dot {
  background: var(--color-accent-orange);
  border-color: var(--color-accent-orange);
  color: var(--color-white);
  box-shadow: 0 0 20px rgba(247,148,29,0.4);
}

.pk__step-title {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-light);
  transition: color 0.4s ease;
}

.pk__step.active .pk__step-title {
  color: var(--color-white);
}

/* --- Ambient --- */
.pk__ambient {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.pk__ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.07;
}

.pk__ambient-orb--1 {
  width: 350px; height: 350px;
  background: var(--color-accent-orange);
  top: -80px; right: -80px;
}

.pk__ambient-orb--2 {
  width: 300px; height: 300px;
  background: var(--color-success);
  bottom: -100px; left: -60px;
  opacity: 0.04;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .pk__stages,
  .pk__timeline {
    gap: var(--space-3);
  }
  .pk__card {
    min-height: 180px;
    padding: var(--space-3);
  }
}

@media (max-width: 768px) {
  .pk__stages {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .pk__timeline { display: none; }
  .pk__card {
    min-height: 160px;
    padding: var(--space-5);
  }
  .pk__card::after {
    position: absolute;
    top: var(--space-2);
    left: var(--space-3);
    font-size: 10px;
    color: var(--color-accent-orange);
    font-weight: var(--fw-bold);
    letter-spacing: 0.1em;
  }
  .pk__card:nth-child(1)::after { content: 'STEP 01'; }
  .pk__card:nth-child(2)::after { content: 'STEP 02'; }
  .pk__card:nth-child(3)::after { content: 'STEP 03'; }
  .pk__card:nth-child(4)::after { content: 'STEP 04'; }
  .pk__card:nth-child(5)::after { content: 'STEP 05'; }
}