/* ==========================================================================
   ROBOTIC ARM PRODUCT PAGE - "MOTION LAB" STYLES
   ========================================================================== */

/* Arm Hero */
.arm-hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  padding: 60px 0 80px;
  background: radial-gradient(circle at 70% 40%, rgba(37, 99, 235, 0.16) 0%, rgba(6, 9, 17, 0.98) 72%);
  border-bottom: 1px solid var(--rp-border);
  overflow: hidden;
}

.arm-hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.arm-hero-content {
  position: relative;
  z-index: 2;
}

.arm-hero-title {
  font-size: clamp(38px, 4.5vw, 62px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -2px;
  color: #ffffff;
  margin: 16px 0 20px;
}

.arm-hero-copy {
  font-size: 16px;
  line-height: 1.7;
  color: var(--rp-text-muted);
  max-width: 540px;
  margin-bottom: 28px;
}

.arm-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
}

.arm-hero-visual {
  position: relative;
}

.arm-hero-frame {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--rp-border-accent);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 30px rgba(56, 189, 248, 0.15);
  background: #080d1a;
}

.arm-hero-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: contrast(1.05) brightness(0.95);
}

/* Motion Lab Joint Inspector Section */
.arm-motion-lab {
  background: #070b14;
}

.arm-lab-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 36px;
  align-items: center;
}

/* Visual Arm Joint Canvas */
.arm-visual-canvas {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--rp-border-accent);
  background: radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.9) 0%, rgba(6, 9, 17, 0.98) 100%);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
  aspect-ratio: 10 / 7;
  width: 100%;
  display: block;
}

.arm-visual-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.85;
  filter: drop-shadow(0 10px 25px rgba(0, 0, 0, 0.6));
  user-select: none;
  display: block;
}

/* Interactive Joint Hotspots */
.arm-joint-pin {
  position: absolute;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(8, 14, 26, 0.9);
  border: 2px solid var(--rp-blue-light);
  color: #ffffff;
  font-family: var(--rp-font-mono);
  font-size: 11px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transform: translate(-50%, -50%);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
  z-index: 10;
  outline: none;
}

.arm-joint-pin::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px dashed rgba(0, 210, 255, 0.4);
  animation: armPinSpin 8s linear infinite;
  pointer-events: none;
}

@keyframes armPinSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.arm-joint-pin:hover,
.arm-joint-pin:focus-visible {
  border-color: var(--rp-cyan);
  background: #0284c7;
  transform: translate(-50%, -50%) scale(1.15);
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.8);
}

.arm-joint-pin.active {
  background: var(--rp-cyan);
  color: #060911;
  border-color: #ffffff;
  transform: translate(-50%, -50%) scale(1.2);
  box-shadow: 0 0 24px rgba(0, 210, 255, 0.9);
}

/* Specific Positions for J1 - J6 on arm visual */
.arm-joint-pin[data-joint="J1"] { top: 75%; left: 21%; } /* base */
.arm-joint-pin[data-joint="J2"] { top: 58.5%; left: 20.8%; } /* shoulder */
.arm-joint-pin[data-joint="J3"] { top: 23%; left: 41.5%; } /* elbow */
.arm-joint-pin[data-joint="J4"] { top: 38.5%; left: 71.2%; } /* wrist pitch */
.arm-joint-pin[data-joint="J5"] { top: 36%; left: 80.5%; } /* wrist roll */
.arm-joint-pin[data-joint="J6"] { top: 53%; left: 80.5%; } /* tool flange */

/* Joint Info Panel (Right side) */
.arm-joint-inspector {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arm-joint-selector-nav {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}

.arm-joint-tab-btn {
  padding: 8px 4px;
  font-family: var(--rp-font-mono);
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--rp-border);
  color: var(--rp-text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.arm-joint-tab-btn:hover {
  color: #ffffff;
  border-color: var(--rp-blue-light);
}

.arm-joint-tab-btn.active {
  background: rgba(37, 99, 235, 0.25);
  border-color: var(--rp-cyan);
  color: #ffffff;
  box-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
}

.arm-joint-detail-card {
  background: var(--rp-bg-card);
  border: 1px solid var(--rp-border-accent);
  border-radius: 16px;
  padding: 28px;
  position: relative;
  box-shadow: var(--rp-glow-card);
}

.arm-joint-detail-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--rp-text-white);
  margin: 12px 0 6px;
}

.arm-joint-axis-badge {
  font-family: var(--rp-font-mono);
  font-size: 11px;
  color: var(--rp-cyan);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.arm-joint-detail-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--rp-text-muted);
  margin-top: 14px;
  margin-bottom: 20px;
}

/* 4-Step Automation Sequence Section */
.arm-sequence-section {
  background: #060911;
}

.arm-step-progress-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.arm-seq-step-card {
  background: var(--rp-bg-card);
  border: 1px solid var(--rp-border);
  border-radius: 14px;
  padding: 20px;
  position: relative;
  transition: all 0.3s ease;
}

.arm-seq-step-card.active {
  border-color: var(--rp-cyan);
  background: rgba(37, 99, 235, 0.18);
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.25);
  transform: translateY(-3px);
}

.arm-seq-step-card.completed {
  border-color: rgba(56, 189, 248, 0.5);
  background: rgba(14, 25, 48, 0.6);
}

.arm-seq-num {
  font-family: var(--rp-font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--rp-blue-light);
  margin-bottom: 6px;
}

.arm-seq-step-card.active .arm-seq-num {
  color: var(--rp-cyan);
}

.arm-seq-title {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.arm-seq-desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--rp-text-muted);
  margin: 0;
}

/* Automation Stage Simulation Canvas */
.arm-simulation-stage {
  background: linear-gradient(180deg, #050a14 0%, #03060d 100%);
  border: 1px solid var(--rp-border-accent);
  border-radius: 20px;
  padding: 30px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 55px rgba(0, 0, 0, 0.45);
}

.arm-sim-canvas-wrap {
  width: 100%;
  height: clamp(300px, 32vw, 380px);
  background:
    radial-gradient(circle at 50% 60%, rgba(37, 99, 235, 0.08) 0%, transparent 75%),
    linear-gradient(rgba(56, 189, 248, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.05) 1px, transparent 1px);
  background-size: 100% 100%, 32px 32px, 32px 32px;
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

.arm-sim-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.arm-sim-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .arm-joint-pin::after {
    animation: none !important;
  }
}

/* Responsive */
@media (max-width: 991px) {
  .arm-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .arm-lab-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .arm-visual-canvas {
    min-height: 400px;
  }
  .arm-visual-img {
    height: 400px;
  }
  .arm-step-progress-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .arm-visual-canvas {
    min-height: 320px;
  }
  .arm-visual-img {
    height: 320px;
  }
  .arm-step-progress-grid {
    grid-template-columns: 1fr;
  }
  .arm-joint-selector-nav {
    grid-template-columns: repeat(3, 1fr);
  }
  .arm-sim-controls {
    flex-direction: column;
    align-items: stretch;
  }
}

/* Polished simulation states */
.arm-sim-svg {
  overflow: visible;
}

.arm-sim-svg #simArmArmature,
.arm-sim-svg #simWorkpiece {
  will-change: transform;
}

.arm-sim-svg #simWorkpiece {
  filter: drop-shadow(0 0 8px rgba(251, 191, 36, 0.35));
}

.arm-sim-svg #simArmArmature line,
.arm-sim-svg #simArmArmature circle,
.arm-sim-svg #simArmArmature polygon {
  vector-effect: non-scaling-stroke;
}

.arm-sim-canvas-wrap::after {
  content: "SIMULATED WORKCELL // VISUAL DEMONSTRATION";
  position: absolute;
  top: 12px;
  right: 14px;
  padding: 5px 9px;
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 5px;
  background: rgba(4, 7, 15, 0.78);
  color: rgba(148, 163, 184, 0.8);
  font: 700 9px/1 var(--rp-font-mono);
  letter-spacing: 1.2px;
  pointer-events: none;
}

.arm-sim-controls {
  border-top: 1px solid var(--rp-border);
  padding-top: 18px;
}

#armRunSimBtn:disabled {
  opacity: 0.72;
  cursor: wait;
  transform: none;
}

@media (max-width: 576px) {
  .arm-visual-canvas {
    aspect-ratio: 10 / 7;
    min-height: 0;
  }

  .arm-visual-img {
    height: 100%;
  }

  .arm-joint-pin {
    width: 34px;
    height: 34px;
    font-size: 10px;
  }

  .arm-simulation-stage {
    padding: 16px;
  }

  .arm-sim-canvas-wrap {
    height: 260px;
  }

  .arm-sim-canvas-wrap::after {
    display: none;
  }
}