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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            background: #f8f9fa;
            color: #333;
        }

        .container{
            max-width: 1200px;
            margin: 0 auto;
        }

        .header2 {
            text-align: center;
            margin-bottom: 3rem;
        }

        .header2 h1 {
            font-size: 2.5rem;
            color: #1d2124;
            margin-bottom: 1rem;
        }

        .header2 p {
            color: #6c757d;
            font-size: 1.1rem;
        }

        .input-section {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            margin-bottom: 2rem;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #495057;
        }

        .form-group select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: 5px;
            font-size: 1rem;
            background-color: white;
            cursor: pointer;
        }

        .form-group select:focus {
            outline: none;
            border-color: #80bdff;
            box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
        }

        .form-group select option {
            padding: 0.5rem;
        }
        .form-group input {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: 5px;
            font-size: 1rem;
        }

        .btn-analyze {
            background: #007bff;
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            border-radius: 5px;
            cursor: pointer;
            width: 100%;
            transition: background 0.3s;
        }

        .btn-analyze:hover {
            background: #0056b3;
        }

        .result-section {
            display: none;
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
        }

        .metrics {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .metric-card {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
        }

        .metric-card h3 {
            color: #6c757d;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }

        .metric-card .value {
            font-size: 1.8rem;
            font-weight: 600;
            color: #007bff;
        }

        .loading {
            display: none;
            text-align: center;
            padding: 2rem;
        }

        .loading-spinner {
            border: 4px solid #f3f3f3;
            border-top: 4px solid #007bff;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 0 auto 1rem;
        }

        .progress-container {
            width: 100%;
            background-color: #f3f3f3;
            border-radius: 5px;
            margin: 1rem 0;
            overflow: hidden;
        }

        .progress-bar {
            width: 0;
            height: 20px;
            background-color: #007bff;
            transition: width 0.3s ease;
            position: relative;
        }

        .progress-text {
            position: absolute;
            width: 100%;
            text-align: center;
            color: white;
            font-size: 0.9rem;
            line-height: 20px;
        }

        .ai-suggestions {
            background: #e9ecef;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 2rem;
        }

        .ai-suggestions h2 {
            color: #495057;
            margin-bottom: 1rem;
        }

        .ai-suggestions h3 {
            color: #007bff;
            margin: 1.5rem 0 1rem;
            font-size: 1.2rem;
            border-left: 4px solid #007bff;
            padding-left: 1rem;
        }

        .ai-suggestions ul {
            list-style-type: none;
            padding-left: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .ai-suggestions li {
            position: relative;
            margin-bottom: 0.8rem;
            line-height: 1.6;
            color: #495057;
        }

        .ai-suggestions li:before {
            content: '•';
            color: #007bff;
            font-weight: bold;
            position: absolute;
            left: -1rem;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }