/* ============================================================================
   PDF VIEWER STYLES
   Beautiful PDF viewer for Technical Drawing display below chat
   ============================================================================ */

/* PDF Viewer Container */
.pdf-viewer-container {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 20px;
  padding: 0;
  box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
  position: relative;
  overflow: hidden;
  animation: slideInFromBottom 0.5s ease-out;
  margin-top: 24px;
  display: none; /* Hidden by default */
}

.pdf-viewer-container.visible {
  display: block;
}

/* Glass morphism effect */
.pdf-viewer-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  z-index: 0;
  pointer-events: none;
}

/* PDF Viewer Header */
.pdf-viewer-header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  color: white;
  background: rgba(0, 0, 0, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.pdf-viewer-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.pdf-viewer-title i {
  font-size: 1.5rem;
  animation: pulse 2s infinite;
}

.pdf-viewer-subtitle {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 4px;
}

/* PDF Viewer Controls */
.pdf-viewer-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.pdf-control-btn {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pdf-control-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.pdf-control-btn:active {
  transform: translateY(0);
}

.pdf-control-btn i {
  font-size: 1rem;
}

/* PDF Content Area */
.pdf-viewer-content {
  position: relative;
  z-index: 1;
  background: white;
  border-radius: 0 0 20px 20px;
  overflow: hidden;
}

.pdf-iframe-wrapper {
  position: relative;
  width: 100%;
  height: 600px;
  background: #f5f5f5;
}

.pdf-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Loading State */
.pdf-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  z-index: 10;
}

.pdf-loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(102, 126, 234, 0.2);
  border-top: 4px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}

.pdf-loading-text {
  color: #667eea;
  font-weight: 600;
  font-size: 1rem;
}

/* Empty State */
.pdf-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 400px;
  color: #9ca3af;
  text-align: center;
  padding: 40px;
}

.pdf-empty-state i {
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

.pdf-empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #6b7280;
  margin-bottom: 8px;
}

.pdf-empty-state-subtitle {
  font-size: 0.875rem;
  color: #9ca3af;
}

/* Fullscreen Styles */
.pdf-viewer-container.fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  margin: 0;
  border-radius: 0;
  z-index: 9999;
  animation: none;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.pdf-viewer-container.fullscreen .pdf-viewer-header {
  border-radius: 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.pdf-viewer-container.fullscreen .pdf-viewer-content {
  height: calc(100vh - 80px);
  border-radius: 0;
  background: #2d2d2d;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdf-viewer-container.fullscreen .pdf-iframe-wrapper {
  width: 100%;
  height: 100%;
  background: #2d2d2d;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdf-viewer-container.fullscreen .pdf-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
}

/* Animations */
@keyframes slideInFromBottom {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .pdf-viewer-header {
    padding: 16px;
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .pdf-viewer-controls {
    width: 100%;
    justify-content: flex-end;
  }

  .pdf-viewer-title {
    font-size: 1.125rem;
  }

  .pdf-iframe-wrapper {
    height: 400px;
  }

  .pdf-control-btn {
    padding: 6px 12px;
    font-size: 0.75rem;
  }
}

/* Success animation when PDF is loaded */
@keyframes successPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(102, 126, 234, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
  }
}

.pdf-viewer-container.loaded {
  animation: successPulse 1.5s ease-out;
}

/* Close button specific styling */
.pdf-control-btn.close-btn {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.3);
}

.pdf-control-btn.close-btn:hover {
  background: rgba(239, 68, 68, 0.3);
}

/* Download button specific styling */
.pdf-control-btn.download-btn {
  background: rgba(34, 197, 94, 0.2);
  border-color: rgba(34, 197, 94, 0.3);
}

.pdf-control-btn.download-btn:hover {
  background: rgba(34, 197, 94, 0.3);
}

/* Fullscreen button specific styling */
.pdf-control-btn.fullscreen-btn {
  background: rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.3);
}

.pdf-control-btn.fullscreen-btn:hover {
  background: rgba(59, 130, 246, 0.3);
}