:root {
      --stellar-primary: #2d6cdf;
      --stellar-secondary: #6c757d;
      --stellar-success: #28a745;
      --stellar-gradient: linear-gradient(135deg, var(--stellar-primary) 0%, #1a57be 100%);
      --cmfgen-gradient: linear-gradient(135deg, var(--stellar-success) 0%, #20c997 100%);
    }

    body {
      background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
      min-height: 100vh;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    .stellar-card {
      box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.1);
      border: none;
      border-radius: 1rem;
    }

    .stellar-header {
      background: var(--stellar-gradient);
      color: white;
      border-radius: 1rem 1rem 0 0 !important;
    }

    .cmfgen-section {
      background: var(--cmfgen-gradient);
      color: white;
      border-radius: 0.75rem;
      position: relative;
    }

    .cmfgen-value {
      font-family: 'Courier New', monospace;
      font-size: 1.25rem;
      font-weight: bold;
      background: rgba(0, 0, 0, 0.15);
      border: 2px dashed rgba(255, 255, 255, 0.4);
      letter-spacing: 0.5px;
    }

    .method-card {
      border-left: 4px solid var(--stellar-primary);
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .method-card:hover {
      transform: translateY(-2px);
      box-shadow: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.1);
    }

    .info-badge {
      background: var(--stellar-primary);
      color: white;
      border-radius: 50%;
      width: 18px;
      height: 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.7rem;
      font-weight: bold;
      cursor: help;
    }

    .tooltip-inner {
      max-width: 300px;
      text-align: left;
    }

    .btn-stellar {
      background: var(--stellar-gradient);
      border: none;
      color: white;
      transition: all 0.3s;
    }

    .btn-stellar:hover {
      transform: translateY(-1px);
      box-shadow: 0 0.25rem 0.75rem rgba(45, 108, 223, 0.3);
      color: white;
    }

    .copy-btn {
      background: rgba(255, 255, 255, 0.2);
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: white;
      transition: all 0.3s;
    }

    .copy-btn:hover {
      background: rgba(255, 255, 255, 0.3);
      color: white;
      transform: translateY(-1px);
    }

    .comparison-excellent {
      background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
      border-color: #28a745;
    }

    .comparison-good {
      background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
      border-color: #ffc107;
    }

    .comparison-warning {
      background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
      border-color: #dc3545;
    }

    .spinner-border-sm {
      width: 1rem;
      height: 1rem;
    }

    .form-floating label {
      color: var(--stellar-secondary);
    }

    .form-floating input:focus ~ label {
      color: var(--stellar-primary);
    }

    .fade-in {
      animation: fadeIn 0.5s ease-in;
    }

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

    .stellar-icon {
      color: var(--stellar-primary);
    }