:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #14b8a6;
    --bg-light: #f8fafc;
    --bg-dark: #1e293b;
    --text-light: #334155;
    --text-dark: #e2e8f0;
    --card-light: #ffffff;
    --card-dark: #334155;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --border-light: #e2e8f0;
    --border-dark: #475569;
    --highlight-light: #dbeafe;
    --highlight-dark: #1e40af;
    --transition: all 0.3s ease;
  }

  body {
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-light);
    color: var(--text-light);
    line-height: 1.6;
    transition: var(--transition);
  }

  body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-dark);
  }

  .container {
    width: 92%;
    max-width: 1300px;
    margin: 20px auto;
    padding: 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    background-color: var(--card-light);
    transition: var(--transition);
  }

  body.dark-mode .container {
    background-color: var(--card-dark);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  }

  header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 2rem 1.5rem;
    position: relative;
    overflow: hidden;
  }

  header h1 {
    margin: 0;
    font-size: 2.3em;
    font-weight: 700;
    position: relative;
    z-index: 2;
  }

  header::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    z-index: 1;
  }

  .theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
    background-color: rgba(255, 255, 255, 0.2);
  }

  .theme-toggle:hover {
    transform: rotate(30deg);
    background-color: rgba(255, 255, 255, 0.3);
  }

  nav {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    background-color: #f1f5f9;
    padding: 0.7rem;
    scrollbar-width: thin;
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  body.dark-mode nav {
    background-color: #1e293b;
  }

  nav::-webkit-scrollbar {
    height: 4px;
  }

  nav::-webkit-scrollbar-track {
    background: transparent;
  }

  nav::-webkit-scrollbar-thumb {
    background-color: rgba(0,0,0,0.2);
    border-radius: 20px;
  }

  body.dark-mode nav::-webkit-scrollbar-thumb {
    background-color: rgba(255,255,255,0.2);
  }

  nav button {
    background-color: transparent;
    color: var(--text-light);
    border: none;
    padding: 0.8rem 1.2rem;
    margin: 0 0.3rem;
    cursor: pointer;
    border-radius: 8px;
    white-space: nowrap;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  body.dark-mode nav button {
    color: var(--text-dark);
  }

  nav button:hover {
    background-color: rgba(37, 99, 235, 0.1);
  }

  nav button.active {
    background-color: var(--primary-color);
    color: white;
  }

  nav button i {
    font-size: 1.1rem;
  }

  .protocol-section {
    display: none;
    padding: 1.5rem;
    animation: fadeIn 0.4s ease;
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .protocol-section.active {
    display: block;
  }

  h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.8rem;
    margin-top: 0.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.8rem;
  }

  h3 {
    color: var (--secondary-color);
    margin-top: 1.5rem;
    font-weight: 600;
  }

  .protocol-explanation {
    background-color: var(--highlight-light);
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.5rem;
    margin: 1.2rem 0;
    font-size: 1rem;
    border-radius: 0 8px 8px 0;
    transition: var(--transition);
  }

  body.dark-mode .protocol-explanation {
    background-color: rgba(37, 99, 235, 0.2);
  }

  .input-section, .output-section {
    margin: 1.5rem 0;
    padding: 1.2rem;
    border-radius: 10px;
    background-color: #f8fafc;
    border: 1px solid var(--border-light);
    transition: var(--transition);
  }

  body.dark-mode .input-section, 
  body.dark-mode .output-section {
    background-color: #1e293b;
    border-color: var(--border-dark);
  }

  .section-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
  }

  body.dark-mode .section-title {
    color: var(--secondary-color);
  }

  .tabs {
    display: flex;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
  }

  body.dark-mode .tabs {
    border-color: var(--border-dark);
  }

  .tab {
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
  }

  .tab.active {
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 500;
  }

  body.dark-mode .tab.active {
    color: var(--secondary-color);
    border-color: var(--secondary-color);
  }

  .tab:hover {
    background-color: rgba(37, 99, 235, 0.1);
  }

  .tab-content {
    display: none;
  }

  .tab-content.active {
    display: block;
  }

  textarea, pre {
    width: 100%;
    min-height: 150px;
    max-height: 300px;
    margin: 0.8rem 0;
    font-family: 'Courier New', Consolas, monospace;
    background-color: #f1f5f9;
    border: 1px solid var(--border-light);
    padding: 1rem;
    box-sizing: border-box;
    overflow: auto;
    border-radius: 6px;
    font-size: 0.9em;
    line-height: 1.4;
    transition: var(--transition);
  }

  body.dark-mode textarea, 
  body.dark-mode pre {
    background-color: #0f172a;
    border-color: var(--border-dark);
    color: var(--text-dark);
  }

  textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
  }

  input[type="file"] {
    width: 100%;
    padding: 0.8rem;
    margin: 0.8rem 0;
    border: 1px dashed var(--border-light);
    border-radius: 6px;
    background-color: #f1f5f9;
    transition: var(--transition);
  }

  body.dark-mode input[type="file"] {
    background-color: #0f172a;
    border-color: var(--border-dark);
    color: var(--text-dark);
  }

  .file-drop-zone {
    border: 2px dashed var(--border-light);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    margin: 1rem 0;
    transition: var(--transition);
    cursor: pointer;
  }

  .file-drop-zone:hover, .file-drop-zone.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
  }

  body.dark-mode .file-drop-zone {
    border-color: var(--border-dark);
  }

  body.dark-mode .file-drop-zone:hover,
  body.dark-mode .file-drop-zone.drag-over {
    border-color: var(--secondary-color);
    background-color: rgba(20, 184, 166, 0.1);
  }

  label {
    font-weight: 500;
    display: block;
    margin: 1rem 0 0.5rem;
  }

  .input-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0;
  }

  input[type="text"] {
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    font-size: 0.95rem;
    transition: var(--transition);
  }

  body.dark-mode input[type="text"] {
    background-color: #0f172a;
    border-color: var (--border-dark);
    color: var(--text-dark);
  }

  input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
  }

  button.action-button {
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
  }

  button.action-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  }

  button.action-button:active {
    transform: translateY(0);
  }

  .error {
    color: var(--error-color);
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 0.8rem;
    border-radius: 6px;
    margin: 1rem 0;
    font-weight: 500;
  }

  .success {
    color: var(--success-color);
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 0.8rem;
    border-radius: 6px;
    margin: 1rem 0;
    font-weight: 500;
  }

  .warning {
    color: var(--warning-color);
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    padding: 0.8rem;
    border-radius: 6px;
    margin: 1rem 0;
    font-weight: 500;
  }

  .user-friendly-view {
    background-color: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1.5rem;
    transition: var(--transition);
  }

  body.dark-mode .user-friendly-view {
    background-color: #1e293b;
    border-color: var(--border-dark);
  }

  .result-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.95rem;
  }

  .result-table th {
    background-color: var(--primary-color);
    color: white;
    text-align: left;
    padding: 0.8rem;
  }

  .result-table td {
    padding: 0.8rem;
    border-bottom: 1px solid var(--border-light);
  }

  body.dark-mode .result-table td {
    border-color: var(--border-dark);
  }

  .result-table tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.02);
  }

  body.dark-mode .result-table tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
  }

  .patient-card {
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    background-color: #fff;
    transition: var(--transition);
  }

  body.dark-mode .patient-card {
    background-color: #334155;
    border-color: var(--border-dark);
  }

  .patient-header {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 0.5rem;
    margin-bottom: 0.8rem;
  }

  body.dark-mode .patient-header {
    border-color: var(--border-dark);
  }

  .patient-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary-color);
  }

  body.dark-mode .patient-name {
    color: var(--secondary-color);
  }

  .patient-id {
    color: #64748b;
  }

  .exam-item {
    margin: 0.5rem 0;
    padding: 0.5rem;
    border-left: 3px solid var(--secondary-color);
    background-color: rgba(20, 184, 166, 0.05);
  }

  .abnormal {
    font-weight: 600;
    color: var(--error-color);
  }

  .normal {
    color: var(--success-color);
  }

  .info-box {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background-color: rgba(37, 99, 235, 0.05);
    border-left: 4px solid var(--primary-color);
    margin: 1rem 0;
    border-radius: 0 6px 6px 0;
  }

  body.dark-mode .info-box {
    background-color: rgba(37, 99, 235, 0.1);
  }

  .info-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
  }

  .report-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
  }

  .report-logo {
    font-weight: 700;
    font-size: 1.2rem;
    color: var (--primary-color);
  }

  .report-date {
    color: #64748b;
  }

  .dicom-preview {
    text-align: center;
    margin: 1rem 0;
  }

  .dicom-info {
    margin-top: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.8rem;
  }

  .dicom-info-item {
    padding: 0.5rem;
    background-color: rgba(37, 99, 235, 0.05);
    border-radius: 4px;
  }

  .dicom-info-label {
    font-weight: 500;
    margin-bottom: 0.2rem;
    color: var(--primary-color);
  }

  body.dark-mode .dicom-info-label {
    color: var (--secondary-color);
  }

  .reference-range {
    font-size: 0.85rem;
    color: #64748b;
  }

  footer {
    text-align: center;
    padding: 1.5rem;
    background-color: #f1f5f9;
    border-top: 1px solid var(--border-light);
    font-size: 0.9rem;
    color: #64748b;
    transition: var(--transition);
  }

  body.dark-mode footer {
    background-color: #0f172a;
    border-color: var(--border-dark);
    color: #94a3b8;
  }

  .toggle-json-view {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
  }

  .toggle-json-view:hover {
    background-color: rgba(37, 99, 235, 0.1);
  }

  body.dark-mode .toggle-json-view {
    color: var(--secondary-color);
  }

  .tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
  }

  .tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #27272a;
    color: white;
    text-align: center;
    border-radius: 6px;
    padding: 0.5rem;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.85rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

  .tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
  }

  .security-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.6rem;
    background-color: rgba(16, 185, 129, 0.1);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--success-color);
    margin-top: 0.5rem;
  }

  /* Responsive adjustments */
  @media (max-width: 768px) {
    .container {
      width: 95%;
    }
    
    nav {
      padding: 0.5rem;
    }
    
    nav button {
      padding: 0.6rem 1rem;
    }
    
    h2 {
      font-size: 1.3rem;
    }
    
    .input-section, .output-section {
      padding: 1rem;
    }
  }

  @media (max-width: 576px) {
    header h1 {
      font-size: 1.8rem;
    }
    
    .protocol-section {
      padding: 1rem;
    }
    
    .dicom-info {
      grid-template-columns: 1fr;
    }
  }

  /* Animations */
  @keyframes pulse {
    0% {
      box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4);
    }
    70% {
      box-shadow: 0 0 0 10px rgba(37, 99, 235, 0);
    }
    100% {
      box-shadow: 0 0 0 0 rgba(37, 99, 235, 0);
    }
  }

  .pulse {
    animation: pulse 1.5s infinite;
  }

  .loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(37, 99, 235, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  /* Estilos para abas DICOM */
  .dicom-source-tabs {
    margin-bottom: 0;
  }

  .dicom-source {
    display: none;
    padding: 1rem;
    border: 1px solid var(--border-light);
    border-top: none;
    border-radius: 0 0 8px 8px;
    margin-bottom: 1rem;
    background-color: #f8fafc;
  }

  body.dark-mode .dicom-source {
    background-color: #1f2937;
    border-color: var(--border-dark);
  }

  .dicom-source.active {
    display: block;
    animation: fadeIn 0.3s ease;
  }

  .dicom-select {
    width: 100%;
    padding: 0.7rem;
    margin: 0.8rem 0;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    background-color: white;
    font-size: 1rem;
    transition: var(--transition);
  }

  body.dark-mode .dicom-select {
    background-color: #0f172a;
    border-color: var(--border-dark);
    color: var(--text-dark);
  }

  .dicom-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
  }

  .dicom-select option {
    padding: 0.5rem;
  }

  #onlineDicomStatus {
    margin-top: 0.8rem;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
  }

  .loading-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
  }

  .spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(37, 99, 235, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
    display: inline-block;
  }

  /* Estilos para visualização de imagem DICOM */
  .dicom-canvas-container {
    width: 400px;
    height: 400px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid var(--border-light);
  }

  body.dark-mode .dicom-canvas-container {
    border-color: var(--border-dark);
  }

  .dicom-canvas {
    width: 100%;
    height: 100%;
    background-color: black;
  }

  .dicom-controls {
    margin-top: 0.8rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
  }

  .dicom-btn {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
  }

  .dicom-btn:hover {
    background-color: var(--primary-dark);
  }
  /* Estilos para visualização de imagem DICOM */
  .dicom-preview {
    width: 100%;
    height: 400px;
    background-color: #000;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    margin: 1rem auto;
    border: 1px solid var(--border-light);
  }
  
  body.dark-mode .dicom-preview {
    border-color: var(--border-dark);
  }
  
  /* Controles DICOM */
  .dicom-controls {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.7);
    border-radius: 20px;
    padding: 5px 10px;
    display: flex;
    gap: 5px;
    z-index: 100;
  }
  
  .dicom-btn {
    background-color: transparent;
    border: none;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .dicom-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
  }
  
  .dicom-btn.active {
    background-color: rgba(52, 152, 219, 0.5);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.8);
  }
  
  .dicom-btn.disabled,
  .dicom-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }
  
  .dicom-image-controls {
    position: absolute;
    bottom: 10px;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 8px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 5px;
    z-index: 10;
  }

  /* Tabela de metadados DICOM */
  .dicom-metadata-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.9rem;
  }
  
  .dicom-metadata-table th {
    text-align: left;
    padding: 8px;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 600;
    width: 40%;
  }
  
  .dicom-metadata-table td {
    padding: 8px;
    border-bottom: 1px solid var(--border-light);
  }
  
  body.dark-mode .dicom-metadata-table th {
    background-color: var(--bg-dark-secondary);
  }
  
  body.dark-mode .dicom-metadata-table td {
    border-bottom-color: var(--border-dark);
  }

  #dicom-image-container {
    min-width: 512px;
    min-height: 512px;
    width: 100%;
    height: 512px;
    background: #111;
    position: relative;
    /* Kept to see if canvas is smaller/transparent */
    position: static !important; /* Override .dicom-preview and ensure static positioning */
    overflow: visible !important; /* Override .dicom-preview and ensure overflow is visible */
  }

  #dicom-image-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
    background: transparent;
    position: static !important;
  }