* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        #page-banner {
    width: auto;
    height: auto;
}
        


        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: rgb(38, 82, 170);
            min-height: 100vh;
            padding: 40px 20px;
            overflow-x: hidden;
           
        }

        .container {
            max-width: 1600px;
            margin: 0 auto;
            margin-top: auto;
            
           
        }

        .header {
            text-align: center;
            color: white;
            margin-bottom: 50px;
           
        }

        .header h1 {
            font-size: 48px;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .header p {
            font-size: 18px;
            opacity: 0.9;
        }

        /* SVG Canvas for connections */
        #connectionCanvas {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        /* Flow Diagram Container */
        .flow-diagram {
            position: relative;
            background: white;
            border-radius: 30px;
            padding: 60px 40px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            min-height: 1800px;
            margin-bottom: 20px;
        }

        /* Node Base Style */
        .node {
            position: absolute;
            background: white;
            border-radius: 15px;
            padding: 20px 30px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
            cursor: pointer;
            transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
            z-index: 10;
            opacity: 0;
            transform: scale(0.5);
            border: 3px solid transparent;
        }

        .node.active {
            opacity: 1;
            transform: scale(1);
        }

        .node:hover {
            transform: scale(1.05) translateY(-5px);
            box-shadow: 0 12px 35px rgba(0, 0, 0, 0.25);
        }

        .node.clicked {
            border-color: #667eea;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.3);
        }

        .node h3 {
            font-size: 18px;
            color: #2c3e50;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .node p {
            font-size: 13px;
            color: #7f8c8d;
            margin: 0;
        }

        .node ul {
            list-style: none;
            padding: 0;
            margin-top: 10px;
            font-size: 12px;
            color: #555;
        }

        .node li {
            padding: 3px 0;
            padding-left: 15px;
            position: relative;
        }

        .node li:before {
            content: "•";
            position: absolute;
            left: 0;
            color: #667eea;
            font-weight: bold;
        }

        /* Node Colors */
        .node.color-blue { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; }
        .node.color-blue h3, .node.color-blue p, .node.color-blue li { color: white; }
        .node.color-blue li:before { color: #ffd700; }

        .node.color-green { background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); color: white; }
        .node.color-green h3, .node.color-green p, .node.color-green li { color: white; }
        .node.color-green li:before { color: #ffd700; }

        .node.color-orange { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); color: white; }
        .node.color-orange h3, .node.color-orange p, .node.color-orange li { color: white; }
        .node.color-orange li:before { color: #ffd700; }

        .node.color-purple { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); color: white; }
        .node.color-purple h3, .node.color-purple p, .node.color-purple li { color: white; }
        .node.color-purple li:before { color: #ffd700; }

        .node.color-pink { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); color: white; }
        .node.color-pink h3, .node.color-pink p, .node.color-pink li { color: white; }
        .node.color-pink li:before { color: #fff; }

        .node.color-teal { background: linear-gradient(135deg, #30cfd0 0%, #330867 100%); color: white; }
        .node.color-teal h3, .node.color-teal p, .node.color-teal li { color: white; }
        .node.color-teal li:before { color: #ffd700; }

        /* Specific Node Positions - Following the sketch layout */
        .application-node { top: 50px; left: 50%; transform: translateX(-50%) scale(0.5); }
        .application-node.active { transform: translateX(-50%) scale(1); }

        .ml-node { top: 180px; left: 25%; }
        .dl-node { top: 180px; right: 25%; }
        .ai-node { top: 180px; left: 50%; transform: translateX(-50%) scale(0.5); }
        .ai-node.active { transform: translateX(-50%) scale(1); }

        .nlp-node { top: 350px; left: 50%; transform: translateX(-50%) scale(0.5); width: 300px; }
        .nlp-node.active { transform: translateX(-50%) scale(1); }

        .architecture-node { top: 520px; left: 50%; transform: translateX(-50%) scale(0.5); width: 350px; }
        .architecture-node.active { transform: translateX(-50%) scale(1); }

        .encoder-node { top: 680px; left: 35%; }
        .decoder-node { top: 680px; right: 35%; }

        .pretraining-node { top: 830px; left: 35%; }
        .finetuning-node { top: 830px; right: 35%; }

        .inference-node { top: 980px; left: 50%; transform: translateX(-50%) scale(0.5); }
        .inference-node.active { transform: translateX(-50%) scale(1); }

        .tokens-node { top: 1130px; left: 50%; transform: translateX(-50%) scale(0.5); width: 320px; }
        .tokens-node.active { transform: translateX(-50%) scale(1); }

        .lms-node { top: 1300px; left: 50%; transform: translateX(-50%) scale(0.5); width: 320px; }
        .lms-node.active { transform: translateX(-50%) scale(1); }

        .foundation-node { top: 1470px; left: 50%; transform: translateX(-50%) scale(0.5); width: 320px; }
        .foundation-node.active { transform: translateX(-50%) scale(1); }

        .multimodal-node { top: 1620px; left: 50%; transform: translateX(-50%) scale(0.5); width: 320px; }
        .multimodal-node.active { transform: translateX(-50%) scale(1); }

        /* Connection Lines */
        .connection-line {
            stroke: #667eea;
            stroke-width: 3;
            fill: none;
            stroke-dasharray: 1000;
            stroke-dashoffset: 1000;
            opacity: 0;
        }

        .connection-line.active {
            animation: drawLine 1s ease-out forwards;
            opacity: 1;
        }

        @keyframes drawLine {
            to {
                stroke-dashoffset: 0;
            }
        }

        .arrow-marker {
            fill: #667eea;
        }

        /* Controls */
        .controls {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 15px;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            padding: 20px 30px;
            border-radius: 50px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
        }

        .btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 25px;
            cursor: pointer;
            font-size: 15px;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        /* Progress Indicator */
        .progress {
            position: fixed;
            top: 20px;
            right: 20px;
            background: white;
            padding: 20px;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
            z-index: 1000;
        }

        .progress h4 {
            color: #2c3e50;
            margin-bottom: 10px;
            font-size: 16px;
        }

        .progress-bar {
            width: 200px;
            height: 8px;
            background: #e0e0e0;
            border-radius: 4px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            width: 0%;
            transition: width 0.5s ease;
        }

        .step-counter {
            margin-top: 10px;
            color: #7f8c8d;
            font-size: 14px;
        }

        /* Info Panel */
        .info-panel {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0);
            background: white;
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            max-width: 600px;
            z-index: 2000;
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        }

        .info-panel.active {
            transform: translate(-50%, -50%) scale(1);
            opacity: 1;
        }

        .info-panel h2 {
            color: #2c3e50;
            margin-bottom: 15px;
            font-size: 28px;
        }

        .info-panel p {
            color: #555;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .close-info {
            position: absolute;
            top: 15px;
            right: 15px;
            background: #e74c3c;
            color: white;
            border: none;
            width: 35px;
            height: 35px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 20px;
            line-height: 1;
        }

        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .overlay.active {
            opacity: 1;
            pointer-events: all;
        }