.main-container {
            max-width: 1200px;
            margin: 5rem auto 2rem;
            padding: 0 1rem;
        }
        
        h1 {
            font-size: 1.8rem;
            margin-bottom: 1.2rem;
            text-align: center;
            background: linear-gradient(45deg, var(--accent), var(--accent-alt));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            padding-bottom: 0.8rem;
        }
        
        h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), var(--accent-alt));
            border-radius: 2px;
        }

        /* Improved visualization layout */
        .visualization-container {
            display: grid;
            grid-template-columns: 1fr;
            grid-template-rows: auto auto;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        /* Controls on top (where users interact first) */
        .controls-card {
            background-color: var(--card-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 1.2rem;
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow);
        }

        .input-controls {
            display: flex;
            gap: 0.8rem;
            margin-bottom: 0.8rem;
        }

        #valueInput {
            flex: 1;
            padding: 0.8rem 1rem;
            background-color: rgba(18, 18, 18, 0.7);
            border: 1px solid var(--glass-border);
            border-radius: 8px;
            font-size: 1rem;
            color: var(--text);
            box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
        }

        #insertBtn {
            background: linear-gradient(45deg, var(--accent), var(--accent-alt));
            color: var(--black);
            border: none;
            border-radius: 8px;
            padding: 0.8rem 1.2rem;
            font-weight: 600;
            cursor: pointer;
            min-width: 120px;
        }

        .button-group {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 0.8rem;
        }

        button {
            padding: 0.8rem;
            background-color: rgba(0, 0, 0, 0.7);
            color: var(--text);
            border: 1px solid var(--glass-border);
            border-radius: 8px;
            cursor: pointer;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            font-weight: 500;
        }
        
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
            border-color: rgba(255, 255, 255, 0.2);
        }
        
        #buildHeapBtn, #heapSortBtn {
            background: linear-gradient(45deg, var(--accent), var(--accent-alt), var(--accent-alt));
            color: var(--black);
            border: none;
            font-weight: 600;
        }
        
        /* Visualization area below controls */
        #container {
            background-color: var(--medium-gray);
            border-radius: 12px;
            box-shadow: var(--shadow);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            height: 300px;
        }
        
        .status-and-array {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1rem;
            margin-top: 1rem;
        }
        
        .status {
            padding: 1rem;
            background-color: var(--card-bg);
            border-radius: 12px;
            font-weight: 500;
            min-height: 20px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow);
        }
        
        .array-view {
            padding: 1rem;
            background-color: var(--card-bg);
            border-radius: 12px;
            overflow-x: auto;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow);
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        
        .array-element {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(45deg, var(--accent), var(--accent-alt));
            color: var(--black);
            border-radius: 8px;
            font-weight: bold;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
        }
        
        .info {
            margin-top: 1.5rem;
            padding: 1.5rem;
            background-color: var(--card-bg);
            border-radius: 12px;
            line-height: 1.7;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow);
        }
        
        .info h3 {
            font-size: 1.2rem;
            margin-bottom: 0.8rem;
            margin-top: 1.2rem;
            position: relative;
            padding-left: 1rem;
            color: var(--text);
        }
        
        .info h3:first-child {
            margin-top: 0;
        }
        
        .info h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 16px;
            background: linear-gradient(to bottom, var(--accent), var(--accent-alt));
            border-radius: 2px;
        }
        
        .info p {
            margin-bottom: 0.6rem;
            color: var(--text-secondary);
            padding-left: 1rem;
            font-size: 0.95rem;
        }
        
        .info p strong {
            color: var(--text);
        }
        
       
        
        /* Responsive design improvements */
        @media (min-width: 768px) {
            .main-container {
                padding: 0 2rem;
                margin-top: 6rem;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .visualization-container {
                grid-template-columns: 2fr 1fr;
                grid-template-rows: 1fr;
            }
            
            .controls-card {
                grid-column: 2;
                grid-row: 1;
            }
            
            #container {
                grid-column: 1;
                grid-row: 1;
                height: 400px;
            }
            
            .input-controls {
                flex-direction: column;
            }
            
            .button-group {
                grid-template-columns: 1fr;
            }
        }
        
        @media (min-width: 992px) {
            .main-container {
                margin-top: 6.5rem;
            }
            
            h1 {
                font-size: 2.2rem;
            }
            
            #container {
                height: 450px;
            }
            
            .status-and-array {
                grid-template-columns: 1fr 1fr;
            }
            
            .input-controls {
                flex-direction: row;
            }
        }
        
        @media (min-width: 1200px) {
            .button-group {
                grid-template-columns: 1fr 1fr;
            }
        }