body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 20px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            color: #333;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            padding: 30px;
        }
        
        h1 {
            text-align: center;
            color: #2c3e50;
            margin-bottom: 30px;
            font-size: 2.5em;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        .main-content {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 30px;
            align-items: start;
        }
        
        .controls {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }
        
        .control-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
        }
        
        input[type="number"], input[type="range"] {
            width: 100%;
            padding: 10px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s ease;
        }
        
        input[type="number"]:focus, input[type="range"]:focus {
            outline: none;
            border-color: #667eea;
        }
        
        input[type="range"] {
            height: 8px;
            background: #e9ecef;
            border-radius: 4px;
            padding: 0;
        }
        
        .range-labels {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: #6c757d;
            margin-top: 5px;
        }
        
        .results {
            background: #e8f5e8;
            padding: 20px;
            border-radius: 10px;
            margin-top: 20px;
        }
        
        .result-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            padding: 8px 0;
            border-bottom: 1px solid #d4edda;
        }
        
        .result-item:last-child {
            border-bottom: none;
        }
        
        .result-label {
            font-weight: 600;
            color: #155724;
        }
        
        .result-value {
            font-weight: bold;
            color: #28a745;
        }
        
        .chart-container {
            background: white;
            border-radius: 15px;
            padding: 20px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }
        
        #powerChart {
            width: 100%;
            height: 500px;
            border: 2px solid #e9ecef;
            border-radius: 10px;
        }
        
        .quadrant-info {
            margin-top: 20px;
            padding: 15px;
            background: #f8f9fa;
            border-radius: 10px;
            border-left: 4px solid #667eea;
        }
        
        .quadrant-title {
            font-weight: bold;
            color: #2c3e50;
            margin-bottom: 10px;
        }
        
        .legend {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 15px;
            flex-wrap: wrap;
        }
        
        .legend-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 5px 10px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }
        
        .legend-color {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }
        
        .hidden {
            display: none;
        }
        
        .formulas {
            background: #fff3cd;
            border: 2px solid #ffeaa7;
            border-radius: 10px;
            padding: 20px;
            margin-top: 15px;
            animation: slideDown 0.3s ease;
        }
        
        .formulas h3 {
            color: #856404;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .formula-item {
            background: white;
            padding: 12px;
            margin-bottom: 10px;
            border-radius: 5px;
            border-left: 4px solid #ffc107;
            font-family: 'Courier New', monospace;
        }
        
        .formula-toggle button, .phase-toggle button {
            width: 100%;
            padding: 12px;
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 15px;
        }
        
        .formula-toggle button:hover, .phase-toggle button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        
        .quadrant-details {
            margin-top: 20px;
            padding: 15px;
            background: #e3f2fd;
            border-radius: 10px;
            border-left: 4px solid #2196f3;
        }
        
        .quadrant-details h4 {
            color: #1976d2;
            margin-bottom: 10px;
        }
        
        .quadrant-list {
            font-size: 14px;
            line-height: 1.6;
        }
        
        .quadrant-list div {
            margin-bottom: 8px;
            padding: 5px 10px;
            background: white;
            border-radius: 5px;
        }
        

        
        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            
            h1 {
                font-size: 2em;
            }
        }