* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --bg-primary: #ffffff;
      --bg-secondary: #f8f9fa;
      --text-primary: #212529;
      --text-secondary: #6c757d;
      --border-color: #dee2e6;
      --accent: #0066cc;
      --accent-hover: #0052a3;
      --success: #28a745;
      --error: #dc3545;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
      --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
      --radius: 8px;
    }

    @media (prefers-color-scheme: dark) {
      :root {
        --bg-primary: #1a1d23;
        --bg-secondary: #25282f;
        --text-primary: #e9ecef;
        --text-secondary: #adb5bd;
        --border-color: #343a40;
        --accent: #4dabf7;
        --accent-hover: #339af0;
      }
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      overflow-x: hidden;
    }

    /* Header */
    header {
      background: var(--bg-primary);
      border-bottom: 1px solid var(--border-color);
      padding: 1rem 0;
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(10px);
      background: rgba(255,255,255,0.95);
    }

    @media (prefers-color-scheme: dark) {
      header {
        background: rgba(26,29,35,0.95);
      }
    }

    .header-content {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      text-decoration: none;
      color: var(--text-primary);
    }

    .logo img {
      width: 32px;
      height: 32px;
    }

    .logo h1 {
      font-size: 1.25rem;
      font-weight: 600;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
    }

    .nav-link {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.875rem;
      transition: color 0.2s;
    }

    .nav-link:hover {
      color: var(--accent);
    }

    /* Main Container */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 2rem 1.5rem;
      flex: 1;
    }

    /* Page Title */
    .page-header {
      margin-bottom: 2rem;
    }

    .page-title {
      font-size: 1.875rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 0.5rem;
    }

    .page-subtitle {
      color: var(--text-secondary);
      font-size: 1rem;
    }

    /* Service Sections */
    .service-section {
      background: var(--bg-secondary);
      border-radius: var(--radius);
      margin-bottom: 1.5rem;
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

    .section-header {
      padding: 1rem 1.5rem;
      background: var(--bg-primary);
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .section-icon {
      font-size: 1.25rem;
    }

    .section-title {
      font-size: 0.875rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.025em;
      color: var(--text-secondary);
    }

    /* Service Items */
    .service-item {
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--border-color);
      background: var(--bg-primary);
      transition: background-color 0.2s;
    }

    .service-item:last-child {
      border-bottom: none;
    }

    .service-item:hover {
      background: var(--bg-secondary);
    }

    .service-header-row {
      display: flex;
      justify-content: space-between;
      align-items: start;
      margin-bottom: 0.5rem;
    }

    .service-info {
      flex: 1;
    }

    .service-name {
      font-size: 1rem;
      font-weight: 500;
      color: var(--text-primary);
      margin-bottom: 0.25rem;
    }

    .service-description {
      font-size: 0.875rem;
      color: var(--text-secondary);
      line-height: 1.5;
    }

    .service-endpoint {
      font-family: 'SF Mono', Monaco, monospace;
      font-size: 0.75rem;
      color: var(--text-secondary);
      background: var(--bg-secondary);
      padding: 0.25rem 0.5rem;
      border-radius: 4px;
      display: inline-block;
      margin-top: 0.75rem;
      overflow-wrap: anywhere;
    }

    /* Controls */
    .service-controls {
      margin-top: 1rem;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }

    .input-row {
      display: flex;
      gap: 0.5rem;
      width: 100%;
      flex-wrap: wrap;
    }

    .input {
      flex: 1;
      padding: 0.5rem 0.75rem;
      background: var(--bg-primary);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.875rem;
      font-family: inherit;
      color: var(--text-primary);
      transition: all 0.2s;
      min-width: 0;
    }

    .input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
    }

    .input::placeholder {
      color: var(--text-secondary);
    }

    select.input {
      cursor: pointer;
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236c757d' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 0.75rem center;
      padding-right: 2.5rem;
    }

    .btn {
      padding: 0.5rem 1.25rem;
      background: var(--bg-primary);
      color: var(--text-primary);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.875rem;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s;
      white-space: nowrap;
      width: 100%;
      margin-top: 0.5rem;
    }

    .btn:hover {
      background: var(--bg-secondary);
      border-color: var(--text-secondary);
      transform: translateY(-1px);
      box-shadow: var(--shadow-sm);
    }

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

    /* Results */
    .result {
      margin-top: 1rem;
      display: none;
    }

    .result.active {
      display: block;
    }

    .result-content {
      padding: 1rem;
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-family: 'SF Mono', Monaco, monospace;
      font-size: 0.75rem;
      line-height: 1.6;
      overflow-x: auto;
      max-height: 400px;
      overflow-y: auto;
    }

    .result-content pre {
      margin: 0;
      white-space: pre-wrap;
      word-break: break-word;
    }

    .loading {
      text-align: center;
      padding: 2rem;
      color: var(--text-secondary);
    }

    .spinner {
      display: inline-block;
      width: 24px;
      height: 24px;
      border: 3px solid var(--border-color);
      border-top-color: var(--accent);
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
    }

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

    .error {
      color: var(--error);
      padding: 1rem;
      background: rgba(220,53,69,0.1);
      border: 1px solid rgba(220,53,69,0.2);
      border-radius: 6px;
    }

    /* Footer */
    footer {
      background: var(--bg-secondary);
      border-top: 1px solid var(--border-color);
      padding: 2rem 0;
      margin-top: auto;
    }

    .footer-content {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
      text-align: center;
      color: var(--text-secondary);
      font-size: 0.875rem;
    }

    .footer-links {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin-bottom: 1rem;
    }

    .footer-links a {
      color: var(--text-secondary);
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    /* Mobile Styles */
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }

      .container {
        padding: 1.5rem 1rem;
      }

      .page-title {
        font-size: 1.5rem;
      }

      .service-controls {
        flex-direction: column;
      }

      .input-group {
        width: 100%;
      }

      .btn {
        width: 100%;
      }

      select.input {
        width: 100%;
      }

      .footer-links {
        flex-direction: column;
        gap: 0.5rem;
      }
    }

    /* Utility Classes */
    .two-column {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.5rem;
    }

    @media (max-width: 768px) {
      .two-column {
        grid-template-columns: 1fr;
      }
    }