* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: Arial, sans-serif; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); padding: 20px; min-height: 100vh; }
        .container { max-width: 1400px; margin: 0 auto; background: white; border-radius: 20px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); overflow: hidden; }
        .header { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 30px; text-align: center; }
        .header h1 { font-size: 2em; margin-bottom: 10px; }
        .tabs { display: flex; background: #f8f9fa; border-bottom: 2px solid #dee2e6; }
        .tab { flex: 1; padding: 15px; text-align: center; cursor: pointer; background: #e9ecef; border: none; font-size: 16px; font-weight: 600; }
        .tab.active { background: white; color: #667eea; border-bottom: 3px solid #667eea; }
        .content { padding: 30px; }
        .scenario-selector { display: flex; gap: 15px; margin-bottom: 30px; justify-content: center; }
        .scenario-btn { padding: 12px 30px; border: 2px solid #dee2e6; border-radius: 10px; background: white; cursor: pointer; font-size: 16px; font-weight: 600; }
        .scenario-btn.active.pessimistic { background: #dc3545; color: white; border-color: #dc3545; }
        .scenario-btn.active.realistic { background: #ffc107; color: #000; border-color: #ffc107; }
        .scenario-btn.active.optimistic { background: #28a745; color: white; border-color: #28a745; }
        .input-section { background: #f8f9fa; padding: 25px; border-radius: 15px; margin-bottom: 30px; }
        .input-section h3 { color: #667eea; margin-bottom: 20px; font-size: 1.3em; }
        .input-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
        .input-group { display: flex; flex-direction: column; }
        .input-group label { margin-bottom: 8px; font-weight: 600; color: #495057; font-size: 14px; }
        .input-group small { color: #6c757d; font-size: 12px; margin-top: 4px; }
        .input-group input, .input-group select { padding: 12px; border: 2px solid #dee2e6; border-radius: 8px; font-size: 16px; background: #e3f2fd; }
        .input-group input.optional { background: #fff3cd; }
        .results-section { background: #f0f0f0; padding: 25px; border-radius: 15px; margin-top: 30px; }
        .results-section h3 { color: #667eea; margin-bottom: 20px; font-size: 1.3em; }
        .results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
        .result-card { background: white; padding: 20px; border-radius: 12px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); border-left: 4px solid #667eea; }
        .result-card label { display: block; font-size: 13px; color: #6c757d; margin-bottom: 8px; font-weight: 600; }
        .result-card .value { font-size: 24px; font-weight: 700; color: #212529; }
        .result-card.positive { border-left-color: #28a745; }
        .result-card.positive .value { color: #28a745; }
        .result-card.negative { border-left-color: #dc3545; }
        .result-card.negative .value { color: #dc3545; }
        .result-card.warning { border-left-color: #ffc107; }
        .result-card.warning .value { color: #ffc107; }
        .calculate-btn { width: 100%; padding: 15px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; border: none; border-radius: 10px; font-size: 18px; font-weight: 700; cursor: pointer; margin-top: 20px; }
        .hidden { display: none; }
        h4 { margin: 20px 0 15px 0; color: #495057; }
        .info-badge { display: inline-block; background: #17a2b8; color: white; padding: 2px 8px; border-radius: 4px; font-size: 11px; margin-left: 8px; }
		.input-group input {
          margin-bottom: 6px;
                           }