* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
            color: #fff;
            min-height: 100vh;
            padding: 20px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            padding: 20px 0;
            margin-bottom: 30px;
        }
        
        h1 {
            font-size: 2.8rem;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
            margin-bottom: 10px;
            background: linear-gradient(to right, #ff7e5f, #feb47b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        .main-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }
        
        @media (max-width: 900px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        
        .control-panel {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.18);
        }
        
        .panel-title {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: #ffcc5c;
            display: flex;
            align-items: center;
        }
        
        .panel-title i {
            margin-right: 10px;
            font-size: 1.5rem;
        }
        
        .param-control {
            margin-bottom: 25px;
        }
        
        .param-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 1.1rem;
        }
        
        .param-name {
            font-weight: bold;
            color: #4d9ef0;
        }
        
        .param-value {
            font-weight: bold;
            background: rgba(255, 255, 255, 0.2);
            padding: 2px 10px;
            border-radius: 10px;
        }
        
        input[type="range"] {
            width: 100%;
            height: 10px;
            border-radius: 5px;
            background: linear-gradient(to right, #1a2a6c, #b21f1f, #fdbb2d);
            outline: none;
            opacity: 0.9;
            transition: opacity 0.2s;
        }
        
        input[type="range"]:hover {
            opacity: 1;
        }
        
        .animation-controls {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 15px;
            margin-top: 30px;
        }
        
        .btn {
            background: linear-gradient(45deg, #ff7e5f, #feb47b);
            border: none;
            padding: 12px 0;
            border-radius: 50px;
            color: white;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
        }
        
        .btn:active {
            transform: translateY(1px);
        }
        
        .btn-reset {
            background: linear-gradient(45deg, #1a2a6c, #4d9ef0);
            grid-column: span 3;
        }
        
        .graph-container {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.18);
            position: relative;
            min-height: 400px;
        }
        
        canvas {
            width: 100% !important;
            height: 350px !important;
        }
        
        .features-table {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.18);
            margin-top: 30px;
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
        }
        
        th {
            background: rgba(255, 255, 255, 0.2);
            padding: 15px;
            text-align: left;
            color: #ffcc5c;
        }
        
        td {
            padding: 15px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .explanation {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.18);
            margin-top: 30px;
            line-height: 1.8;
        }
        
        .explanation h2 {
            color: #ffcc5c;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }
        
        .explanation h3 {
            color: #4d9ef0;
            margin: 25px 0 15px;
            font-size: 1.4rem;
        }
        
        .footer {
            text-align: center;
            margin-top: 40px;
            padding: 20px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        
        .point {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            margin-right: 10px;
        }
        
        .vertex-point {
            background-color: #ff5252;
        }
        
        .root-point {
            background-color: #4caf50;
        }
        
        .yintercept-point {
            background-color: #2196f3;
        }
        
        .function-display {
            text-align: center;
            font-size: 2rem;
            margin: 15px 0 25px;
            padding: 15px;
            background: rgba(0, 0, 0, 0.2);
            border-radius: 10px;
            font-family: 'Courier New', monospace;
            color: #ffcc5c;
        }