/* Basic styling for calculator */
.calculator-container {
    max-width: 1024px;
    margin: 0 auto;
    background-color: white;
    color: #333;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
  }
  
  .dark-mode {
    background-color: #1f2937;
    color: white;
  }
  
  .header {
    background-color: #2563eb;
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .dark-mode .header {
    background-color: #111827;
  }
  
  .tab-container {
    display: flex;
    flex-wrap: wrap;
    border-bottom: 1px solid #e5e7eb;
  }
  
  .dark-mode .tab-container {
    border-color: #374151;
  }
  
  .tab {
    padding: 0.5rem 1rem;
    cursor: pointer;
  }
  
  .tab.active {
    background-color: #dbeafe;
    border-bottom: 2px solid #3b82f6;
  }
  
  .dark-mode .tab.active {
    background-color: #374151;
    border-bottom-color: #60a5fa;
  }
  
  .content {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  .display {
    background-color: #f3f4f6;
    padding: 1rem;
    border-radius: 0.25rem;
    text-align: right;
    font-family: monospace;
    height: 4rem;
    overflow-x: auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    font-size: 1.25rem;
  }
  
  .dark-mode .display {
    background-color: #4b5563;
  }
  
  .button-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
  }
  
  .btn {
    padding: 0.5rem;
    border-radius: 0.25rem;
    background-color: #e5e7eb;
    cursor: pointer;
    text-align: center;
  }
  
  .btn:hover {
    background-color: #d1d5db;
  }
  
  .dark-mode .btn {
    background-color: #4b5563;
  }
  
  .dark-mode .btn:hover {
    background-color: #374151;
  }
  
  .btn-blue {
    background-color: #3b82f6;
    color: white;
  }
  
  .btn-blue:hover {
    background-color: #2563eb;
  }
  
  .dark-mode .btn-blue {
    background-color: #1d4ed8;
  }
  
  .dark-mode .btn-blue:hover {
    background-color: #1e40af;
  }
  
  .btn-green {
    background-color: #10b981;
    color: white;
  }
  
  .btn-green:hover {
    background-color: #059669;
  }
  
  .dark-mode .btn-green {
    background-color: #047857;
  }
  
  .dark-mode .btn-green:hover {
    background-color: #065f46;
  }
  
  .btn-red {
    background-color: #ef4444;
    color: white;
  }
  
  .btn-red:hover {
    background-color: #dc2626;
  }
  
  .dark-mode .btn-red {
    background-color: #b91c1c;
  }
  
  .dark-mode .btn-red:hover {
    background-color: #991b1b;
  }
  
  .btn-yellow {
    background-color: #fef3c7;
  }
  
  .btn-yellow:hover {
    background-color: #fde68a;
  }
  
  .dark-mode .btn-yellow {
    background-color: #92400e;
    color: white;
  }
  
  .dark-mode .btn-yellow:hover {
    background-color: #78350f;
  }
  
  .history-container {
    margin-top: 1rem;
  }
  
  .history-box {
    max-height: 10rem;
    overflow-y: auto;
    background-color: #f9fafb;
    border-radius: 0.25rem;
    padding: 0.5rem;
  }
  
  .dark-mode .history-box {
    background-color: #4b5563;
  }
  
  .history-item {
    border-bottom: 1px solid #e5e7eb;
    padding: 0.25rem 0;
  }
  
  .dark-mode .history-item {
    border-color: #6b7280;
  }
  
  input, select, textarea {
    padding: 0.5rem;
    border: 1px solid #d1d5db;
    border-radius: 0.25rem;
    width: 100%;
  }
  
  .dark-mode input, .dark-mode select, .dark-mode textarea {
    background-color: #4b5563;
    border-color: #6b7280;
    color: white;
  }
  
  .graph-container {
    height: 16rem;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background-color: #f9fafb;
    border-radius: 0.25rem;
  }
  
  .dark-mode .graph-container {
    background-color: #4b5563;
  }
  
  .grid-2col {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  @media (max-width: 768px) {
    .grid-2col {
      grid-template-columns: 1fr;
    }
  }
  
  .flex-row {
    display: flex;
    gap: 1rem;
  }
  
  .flex-col {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }
  
  .panel {
    padding: 1rem;
    background-color: #f3f4f6;
    border-radius: 0.25rem;
  }
  
  .dark-mode .panel {
    background-color: #4b5563;
  }
  
  .mt-4 {
    margin-top: 1rem;
  }
  
  .font-bold {
    font-weight: bold;
  }
  
  .text-center {
    text-align: center;
  }
  
  .text-xl {
    font-size: 1.25rem;
  }
  
  .flex-1 {
    flex: 1;
  }
  
  .simulation-ground {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    border-top: 1px solid #6b7280;
  }