:root {
    --primary-color: #0079bf;
    --primary-hover: #026aa7;
    --light-bg: #f4f4f4;
    --card-bg: white;
    --border-color: #ddd;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --radius: 8px;
    --spacing: 20px;
    --text-color: #333;
    --text-secondary: #666;
    --error-color: #d32f2f;
  }
  
  [data-theme="dark"] {
    --primary-color: #2196f3;
    --primary-hover: #64b5f6;
    --light-bg: #121212;
    --card-bg: #1e1e1e;
    --border-color: #333;
    --text-color: #e0e0e0;
    --text-secondary: #aaaaaa;
    --error-color: #f44336;
  }
  
  html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-bg);
    color: var(--text-color);
    width: 100%;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  header {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
  }
  
  h1 {
    margin: 0;
    font-size: 2rem;
  }
  
  .theme-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
  }
  
  .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.2);
  }
  
  .container {
    width: 100%;
    box-sizing: border-box;
    padding: var(--spacing);
    display: flex;
    flex-direction: column;
  }
  
  .tool-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing);
    margin-bottom: var(--spacing);
    overflow-y: auto;
    padding-right: 10px;
  }
  
  .tool-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing);
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    text-align: center;
  }
  
  .tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  }
  
  .tool-card.active {
    border: 2px solid var(--primary-color);
    background-color: rgba(0, 121, 191, 0.1);
  }
  
  .multi-select-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .selected-count {
    background-color: var(--primary-color);
    color: white;
    border-radius: 20px;
    padding: 2px 8px;
    font-size: 0.8rem;
  }
  
  .tool-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--primary-color);
  }
  
  .tool-name {
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--text-color);
  }
  
  .tool-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
  }
  
  .input-section {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing);
    max-height: 300px;
    overflow-y: auto;
  }
  
  .form-group {
    margin-bottom: 15px;
  }
  
  label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-color);
  }
  
  textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-sizing: border-box;
    resize: vertical;
    min-height: 150px;
    font-family: inherit;
    background-color: var(--card-bg);
    color: var(--text-color);
  }
  
  button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
  }
  
  button:hover {
    background-color: var(--primary-hover);
  }
  
  button:disabled {
    background-color: #999;
    cursor: not-allowed;
  }
  
  .secondary-button {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 6px 12px;
    font-size: 0.9rem;
    margin-left: 10px;
  }
  
  .secondary-button:hover {
    background-color: rgba(0, 121, 191, 0.1);
  }
  
  .response-section {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing);
    box-shadow: var(--shadow);
  }
  
  .response-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
  }
  
  .response-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing);
    overflow-y: auto;
    padding-right: 10px;
  }
  
  .response-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
  }
  
  .response-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 3px 8px rgba(0,0,0,0.15);
  }
  
  .response-card-header {
    background-color: var(--primary-color);
    color: white;
    padding: 10px 15px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .response-card-body {
    padding: 15px;
    max-height: 500px;
    overflow-y: auto;
    background-color: var(--card-bg);
  }
  
  .response-timestamp {
    font-size: 0.8rem;
    opacity: 0.8;
  }
  
  .empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
  }
  
  pre {
    margin: 0;
  }
  
  /* Syntax Highlighted JSON */
  .json-response-card {
    background-color: #f9f9f9;
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #e0e0e0;
    font-family: 'Consolas', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    white-space: pre-wrap;
  }
  .json-response-card span.key { color: brown; }
  .json-response-card span.string { color: olive; }
  .json-response-card span.number { color: teal; }
  .json-response-card span.boolean { color: blue; }
  .json-response-card span.null { color: magenta; }
  
  .spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
  }
  
  @keyframes spin {
    to { transform: rotate(360deg); }
  }
  
  .loading-text {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
  }
  
  .error-header {
    background-color: var(--error-color) !important;
  }
  
  .error-message {
    color: var(--error-color);
  }
  
  @media (max-width: 768px) {
    .tool-cards {
      grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
  }

  /* JSON Card Styling */
.json-card {
    background-color: #ffffff;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 16px;
    margin: 16px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  /* Header styling for the card: use the "format" field as header */
  .json-card-header {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
    margin-bottom: 12px;
  }
  
  /* Styling for key points as a bullet list */
  .json-keypoints {
    margin: 0 0 12px 20px;
    padding: 0;
    list-style: disc;
    color: var(--text-color);
  }
  
  .json-keypoints li {
    margin-bottom: 4px;
    font-size: 0.95rem;
  }
  
  /* Styling for paragraphs */
  .json-paragraphs p {
    margin: 0 0 12px;
    line-height: 1.5;
    font-size: 0.95rem;
    color: var(--text-color);
  }
  
  /* Styling for summary text */
  .json-summary {
    border-top: 1px solid #eee;
    padding-top: 8px;
    margin-top: 12px;
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.95rem;
  }
  
  /* Optional: make the JSON content initially collapsed */
  .json-content.collapsed {
    max-height: 100px;
    overflow-y: auto;
  }
  
  /* Optional button to toggle full JSON view */
  .json-toggle-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    margin-top: 8px;
    transition: background-color 0.2s;
  }
  
  .json-toggle-btn:hover {
    background-color: var(--primary-hover);
  }

  /* JSON Card Styling */
.json-card {
    background-color: #ffffff;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 16px;
    margin: 16px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .json-card-header {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
    margin-bottom: 12px;
  }
  
  .json-keypoints {
    margin: 0 0 12px 20px;
    padding: 0;
    list-style: disc;
    color: var(--text-color);
  }
  
  .json-keypoints li {
    margin-bottom: 4px;
    font-size: 0.95rem;
  }
  
  .json-paragraphs p {
    margin: 0 0 12px;
    line-height: 1.5;
    font-size: 0.95rem;
    color: var(--text-color);
  }
  
  .json-summary {
    border-top: 1px solid #eee;
    padding-top: 8px;
    margin-top: 12px;
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.95rem;
  }
  
  .json-toggle-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    margin-top: 8px;
    transition: background-color 0.2s;
  }
  
  .json-toggle-btn:hover {
    background-color: var(--primary-hover);
  }