* {
      font-family: 'Inter', sans-serif;
    }
    
    h1, h2, h3 {
      font-family: 'Poppins', sans-serif;
    }

    /* Tailwind config for custom colors */
    :root {
      --primary: #4F46E5;
      --primary-dark: #4338CA;
      --primary-light: #6366F1;
      --bg-light: #F8FAFC;
      --bg-secondary: #F1F5F9;
      --border-light: #E2E8F0;
      --text-primary: #0F172A;
      --text-secondary: #64748B;
    }

    /* Gradient background */
    body {
      background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-secondary) 100%);
      min-height: 100vh;
    }

    /* Glassmorphism effect */
    .glass {
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    /* Smooth transitions */
    input, button, textarea {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* Input styling */
    input[type="text"] {
      background: rgba(255, 255, 255, 0.6);
      border: 1px solid var(--border-light);
      color: var(--text-primary);
    }

    input[type="text"]:focus {
      background: white;
      border-color: var(--primary);
      outline: none;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }

    input[type="text"]::placeholder {
      color: var(--text-secondary);
    }

    /* Button styling */
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: white;
      border: none;
      font-weight: 600;
      transition: all 0.3s ease;
      box-shadow: 0 4px 15px rgba(79, 70, 229, 0.2);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(79, 70, 229, 0.3);
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 4px 15px rgba(79, 70, 229, 0.2);
    }

    .btn-secondary {
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      border: 1px solid var(--primary);
      font-weight: 600;
    }

    .btn-secondary:hover {
      background: rgba(79, 70, 229, 0.15);
    }

    .btn-icon {
      background: white;
      border: 1px solid var(--border-light);
      color: var(--text-secondary);
      padding: 10px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .btn-icon:hover {
      background: var(--bg-secondary);
      color: var(--primary);
    }

    /* Metric cards */
    .metric-card {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      transition: all 0.3s ease;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
      border-color: var(--primary);
    }

    .metric-icon {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      color: var(--primary);
      font-size: 24px;
    }

    .metric-value {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-primary);
      margin: 8px 0;
    }

    .metric-label {
      font-size: 14px;
      color: var(--text-secondary);
      font-weight: 500;
    }

    /* Result box */
    .result-box {
      background: rgba(248, 250, 252, 0.5);
      border: 1px solid var(--border-light);
      border-radius: 12px;
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .result-box-content {
      flex: 1;
      text-align: left;
    }

    .result-box-label {
      font-size: 12px;
      color: var(--text-secondary);
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 4px;
    }

    .result-box-link {
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
      word-break: break-all;
      font-size: 16px;
    }

    .result-box-link:hover {
      text-decoration: underline;
    }

    /* Loading animation */
    .spinner {
      display: inline-block;
      width: 16px;
      height: 16px;
      border: 2px solid rgba(79, 70, 229, 0.2);
      border-top-color: var(--primary);
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
      margin-right: 8px;
    }

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

    /* Toast notifications */
    .toast {
      position: fixed;
      bottom: 32px;
      right: 32px;
      background: white;
      color: var(--text-primary);
      padding: 16px 24px;
      border-radius: 12px;
      border: 1px solid var(--border-light);
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
      opacity: 0;
      transform: translateY(20px);
      transition: all 0.3s ease;
      z-index: 9999;
      font-weight: 500;
      max-width: 90vw;
      pointer-events: none;
    }

    .toast.show {
      opacity: 1;
      transform: translateY(0);
    }

    .toast.success {
      border-left: 4px solid #10B981;
    }

    .toast.error {
      border-left: 4px solid #EF4444;
    }

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

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

    /* Responsive adjustments */
    @media (max-width: 640px) {
      .container {
        padding: 20px !important;
      }

      .metric-value {
        font-size: 24px;
      }

      input[type="text"] {
        font-size: 16px; /* Prevent iOS zoom on input focus */
      }
    }