.molar-mass-visualizer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.enhanced-ph-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 20px 0;
}

.periodic-table-mini h4,
.molecule-visualization h4 {
  color: #2e7d32;
  border-bottom: 2px solid #28a745;
  padding-bottom: 5px;
  margin-bottom: 15px;
}

.element-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 4px;
}

.element-btn {
  border: 2px solid #ddd;
  border-radius: 4px;
  padding: 8px;
  text-align: center;
  cursor: pointer;
  font-weight: bold;
  font-size: 12px;
  transition: all 0.3s;
}

.element-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.element-btn div:first-child {
  font-size: 14px;
}

.element-btn div:last-child {
  font-size: 8px;
  font-weight: normal;
}

#molecule-canvas {
  position: relative;
  overflow: hidden;
}

#molecule-display {
  transition: all 0.3s ease;
}

.molar-controls {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
}

.quick-formulas {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 10px;
}

.formula-btn {
  margin: 3px;
  font-size: 12px;
  padding: 5px 10px;
}

.error-message {
  color: #dc3545;
  margin-top: 5px;
  font-size: 14px;
}

.calculation-result {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.calculation-result.show {
  opacity: 1;
  transform: translateY(0);
}

.calculation-result h5 {
  color: #2e7d32;
  border-bottom: 2px solid #28a745;
  padding-bottom: 5px;
}

.result-details > div {
  margin-bottom: 15px;
}

.result-details strong {
  color: #1b5e20;
}

.formula-display span {
  font-size: 18px;
  color: #28a745;
  font-weight: bold;
}

.molar-mass-display span {
  font-size: 24px;
  color: #28a745;
  font-weight: bold;
}

.element-breakdown h6 {
  color: #2e7d32;
  margin-bottom: 10px;
}

.element-breakdown-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}

.element-breakdown-item {
  background: #e9ecef;
  padding: 10px;
  border-radius: 5px;
  border-left: 4px solid;
  animation: slideIn 0.3s ease;
}

.element-breakdown-item > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}

.element-breakdown-item > div:last-child {
  background: #fff;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 5px;
}

.element-breakdown-item > div:last-child > div {
  background: #28a745;
  height: 100%;
  transition: width 0.5s ease;
}

.element-breakdown-item small {
  color: #666;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (max-width: 768px) {
  .enhanced-ph-container {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  
  .element-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 3px;
  }
  
  .element-btn {
    padding: 6px;
    font-size: 10px;
  }
  
  .quick-formulas {
    flex-direction: column;
  }
  
  .element-breakdown-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-color-scheme: dark) {
  .molar-controls,
  .calculation-result {
    background: #2c2c2c;
    border-color: #444;
    color: #e0e0e0;
  }
  
  .periodic-table-mini h4,
  .molecule-visualization h4,
  .calculation-result h5,
  .element-breakdown h6 {
    color: #81c784;
  }
  
  .element-btn {
    border-color: #555;
    color: #e0e0e0;
  }
  
  .element-breakdown-item {
    background: #3c3c3c;
    border-color: #555;
    color: #e0e0e0;
  }
  
  .element-breakdown-item > div:last-child {
    background: #2c2c2c;
  }
  
  #molecule-canvas {
    background: #2c2c2c;
    border-color: #444;
  }
  
  .result-details strong {
    color: #81c784;
  }
}

.element-btn:focus {
  outline: 2px solid #28a745;
  outline-offset: 2px;
}

.formula-btn:focus,
#formula-input:focus {
  outline: 2px solid #28a745;
  outline-offset: 2px;
}

.element-breakdown-item:focus-within {
  border-color: #81c784;
  box-shadow: 0 0 0 2px rgba(40, 167, 69, 0.3);
}