.glass-effect {
            background: rgba(255, 255, 255, 0.9);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .gradient-text {
            background: linear-gradient(135deg, #2563eb, #10b981);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .card-hover {
            transition: all 0.3s ease;
        }
        
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }
        
        .btn-primary {
            background: linear-gradient(135deg, #2563eb, #1d4ed8);
            transition: all 0.3s ease;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
        }
        
        .btn-secondary {
            background: linear-gradient(135deg, #10b981, #059669);
            transition: all 0.3s ease;
        }
        
        .btn-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
        }
        
        #canvas {
            border: 2px solid #e2e8f0;
            border-radius: 12px;
            background: white;
        }
        
        .step-indicator {
            transition: all 0.3s ease;
        }
        
        .step-indicator.active {
            background: linear-gradient(135deg, #2563eb, #10b981);
            color: white;
            transform: scale(1.05);
        }
        
        .parameter-display {
            font-family: 'Courier New', monospace;
            font-weight: bold;
            font-size: 1.1em;
        }
        
        .angle-display {
            background: rgba(37, 99, 235, 0.1);
            border: 1px solid rgba(37, 99, 235, 0.3);
            border-radius: 8px;
            padding: 8px 12px;
        }

         .footer {
            background: linear-gradient(to right, #2c3e50, #1a2530);
            color: #ecf0f1;
            text-align: center;
            padding: 20px;
            margin-top: 25px;
            border-radius: 0 0 10px 10px;
        }
        
        @media (max-width: 768px) {
            .mobile-stack {
                flex-direction: column;
            }
            
            .mobile-full {
                width: 100%;
                margin-bottom: 1rem;
            }
        }