/* ==========================================================================
   3D Interactive Curriculum Explorer Styles
   ========================================================================== */

.viewer-layout {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 24px;
  align-items: stretch;
  min-height: 680px;
  margin-bottom: 40px;
}

.canvas-wrapper {
  position: relative;
  background: radial-gradient(circle at 50% 50%, #111e38 0%, #060b17 100%);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
}

#product3dCanvas {
  width: 100%;
  height: 580px;
  display: block;
  cursor: grab;
}

#product3dCanvas:active {
  cursor: grabbing;
}

/* 3D Viewport Controls Overlay */
.viewer-controls-bar {
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  z-index: 10;
}

.viewer-tag {
  pointer-events: auto;
  background: rgba(7, 12, 24, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(6, 182, 212, 0.4);
  color: var(--cyan);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.viewer-tag .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--cyan);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.viewer-actions {
  pointer-events: auto;
  display: flex;
  gap: 8px;
}

.tool-btn {
  background: rgba(13, 22, 39, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.tool-btn:hover {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--cyan);
  color: var(--cyan);
}

/* Floating Bottom Explode Slider */
.explode-dock {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(13, 22, 39, 0.9);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(6, 182, 212, 0.35);
  border-radius: 999px;
  padding: 10px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 10;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  min-width: 380px;
}

.explode-dock span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-sub);
  white-space: nowrap;
}

.explode-slider {
  flex: 1;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.15);
  outline: none;
}

.explode-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  cursor: pointer;
  transition: all 0.2s;
}

.explode-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.explode-value {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--cyan);
  width: 44px;
  text-align: right;
}

/* Right-Side Course Detail Inspector */
.course-inspector {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
}

.inspector-header {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.inspector-part-tag {
  display: inline-block;
  background: rgba(6, 182, 212, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.inspector-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
}

.inspector-course-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--emerald);
  margin-top: 4px;
}

.inspector-body {
  flex: 1;
}

.plain-language-box {
  background: rgba(6, 182, 212, 0.06);
  border-left: 4px solid var(--cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 16px 18px;
  margin-bottom: 20px;
}

.plain-language-box h4 {
  font-size: 0.88rem;
  color: var(--cyan);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.plain-language-box p {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
}

.component-spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.spec-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 10px 14px;
}

.spec-item small {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

.spec-item b {
  font-size: 0.9rem;
  color: #fff;
}

.syllabus-highlights {
  margin-bottom: 20px;
}

.syllabus-highlights h4 {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 10px;
}

.syllabus-highlights ul {
  list-style: none;
  padding: 0;
}

.syllabus-highlights li {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.syllabus-highlights li::before {
  content: "✔";
  color: var(--emerald);
  font-size: 0.8rem;
  margin-top: 2px;
}

/* Quick Layer Selector Pills */
.layer-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.layer-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-card);
  color: var(--text-sub);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.layer-btn:hover,
.layer-btn.active {
  background: rgba(6, 182, 212, 0.15);
  border-color: var(--cyan);
  color: #fff;
}

/* Fullscreen mode */
.canvas-wrapper.fullscreen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  border-radius: 0;
  height: 100vh;
}

@media (max-width: 1024px) {
  .viewer-layout {
    grid-template-columns: 1fr;
  }
  #product3dCanvas {
    height: 440px;
  }
  .explode-dock {
    min-width: 90%;
  }
}