@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');
        
        #menuBtn {

            position: fixed;

            top: 20px;
            left: 20px;

            z-index: 20;

            width: auto;
            padding: 12px 18px;

            border: none;
            border-radius: 14px;

            background: rgba(20, 40, 80, 0.85);

            color: #d8ecff;

            font-size: 15px;

            cursor: pointer;

            backdrop-filter: blur(10px);

            border: 1px solid rgba(120, 180, 255, 0.25);

            box-shadow:
                0 0 18px rgba(0, 140, 255, 0.25);

            transition: 0.25s;
        }

        #menuBtn:hover {

            transform: translateY(-2px);

            background: rgba(40, 80, 140, 0.95);

            box-shadow:
                0 0 24px rgba(80, 180, 255, 0.45);
        }
        :root {
            --neon-cyan: #00f0ff;
            --neon-blue: #0066ff;
            --neon-purple: #b026ff;
            --neon-green: #00ff88;
            --neon-orange: #ff6600;
            --dark-bg: #0a0e1a;
            --panel-bg: rgba(10, 20, 40, 0.85);
            --grid-color: rgba(0, 240, 255, 0.05);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Noto Sans SC', sans-serif;
            background: var(--dark-bg);
            color: #e0e8ff;
            overflow: hidden;
            height: 100vh;
            width: 100vw;
        }
        
        .bg-grid {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(var(--grid-color) 1px, transparent 1px),
                linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            z-index: 0;
        }
        
        .bg-grid::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at center, transparent 0%, var(--dark-bg) 70%);
        }
        
        .main-container {
            display: flex;
            height: 100vh;
            width: 100vw;
            position: relative;
            z-index: 1;
        }
        
        .display-area {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            min-width: 0;
        }
        
        .canvas-container {
            position: relative;
            width: 90%;
            height: 90%;
            max-width: 800px;
            max-height: 800px;
        }
        
        canvas {
            width: 100%;
            height: 100%;
            display: block;
        }
        
        .control-panel {
            width: 380px;
            min-width: 320px;
            background: var(--panel-bg);
            border-left: 1px solid rgba(0, 240, 255, 0.15);
            backdrop-filter: blur(20px);
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            padding: 24px;
            gap: 20px;
        }
        
        .panel-header {
            text-align: center;
            padding-bottom: 16px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
        }
        
        .panel-header h1 {
            font-family: 'Orbitron', sans-serif;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--neon-cyan);
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
            letter-spacing: 2px;
            margin-bottom: 4px;
        }
        
        .panel-header .subtitle {
            font-size: 0.85rem;
            color: rgba(224, 232, 255, 0.5);
            letter-spacing: 1px;
        }
        
        .control-group {
            background: rgba(0, 20, 40, 0.6);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: 12px;
            padding: 16px;
            position: relative;
        }
        
        .control-group::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 100%;
            background: linear-gradient(180deg, var(--neon-cyan), var(--neon-blue));
        }
        
        .control-group h3 {
            font-family: 'Orbitron', sans-serif;
            font-size: 0.9rem;
            color: var(--neon-cyan);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .control-group h3::before {
            content: '◆';
            font-size: 0.6rem;
            color: var(--neon-blue);
        }
        
        .slider-container {
            margin-bottom: 12px;
        }
        
        .slider-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 8px;
            font-size: 0.85rem;
        }
        
        .slider-label span {
            color: rgba(224, 232, 255, 0.7);
        }
        
        .slider-value {
            font-family: 'Orbitron', sans-serif;
            color: var(--neon-cyan);
            font-weight: 600;
            min-width: 60px;
            text-align: right;
        }
        
        input[type="range"] {
            width: 100%;
            height: 6px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 3px;
            outline: none;
            -webkit-appearance: none;
            appearance: none;
        }
        
        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 18px;
            height: 18px;
            background: var(--neon-cyan);
            border-radius: 50%;
            cursor: pointer;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
            transition: transform 0.2s;
        }
        
        input[type="range"]::-webkit-slider-thumb:hover {
            transform: scale(1.2);
        }
        
        input[type="range"]::-moz-range-thumb {
            width: 18px;
            height: 18px;
            background: var(--neon-cyan);
            border-radius: 50%;
            cursor: pointer;
            border: none;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
        }
        
        .toggle-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(0, 240, 255, 0.05);
        }
        
        .toggle-row:last-child {
            border-bottom: none;
        }
        
        .toggle-label {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(224, 232, 255, 0.8);
        }
        
        .toggle-label .icon {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            font-size: 0.8rem;
        }
        
        .toggle-switch {
            position: relative;
            width: 48px;
            height: 24px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 12px;
            cursor: pointer;
            transition: background 0.3s;
            border: 1px solid rgba(0, 240, 255, 0.2);
        }
        
        .toggle-switch.active {
            background: rgba(0, 240, 255, 0.3);
        }
        
        .toggle-switch::after {
            content: '';
            position: absolute;
            top: 2px;
            left: 2px;
            width: 18px;
            height: 18px;
            background: var(--neon-cyan);
            border-radius: 50%;
            transition: transform 0.3s;
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }
        
        .toggle-switch.active::after {
            transform: translateX(24px);
        }
        
        .data-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }
        
        .data-item {
            background: rgba(0, 20, 40, 0.8);
            border: 1px solid rgba(0, 240, 255, 0.1);
            border-radius: 8px;
            padding: 12px;
            text-align: center;
        }
        
        .data-item .label {
            font-size: 0.75rem;
            color: rgba(224, 232, 255, 0.5);
            margin-bottom: 4px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        
        .data-item .value {
            font-family: 'Orbitron', sans-serif;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--neon-cyan);
        }
        
        .data-item .unit {
            font-size: 0.75rem;
            color: rgba(224, 232, 255, 0.4);
        }
        
        .formula-box {
            background: rgba(0, 10, 30, 0.9);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: 8px;
            padding: 14px;
            font-family: 'Courier New', monospace;
            font-size: 0.85rem;
            color: var(--neon-green);
            line-height: 1.8;
        }
        
        .formula-box .formula-title {
            color: var(--neon-cyan);
            font-weight: bold;
            margin-bottom: 8px;
            font-family: 'Noto Sans SC', sans-serif;
        }
        
        @media (max-width: 900px) {
            .main-container {
                flex-direction: column;
            }
            
            .control-panel {
                width: 100%;
                min-width: unset;
                border-left: none;
                border-top: 1px solid rgba(0, 240, 255, 0.15);
                max-height: 50vh;
                min-height: 300px;
            }
            
            .display-area {
                min-height: 50vh;
            }
        }
        
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }
        
        .pulse {
            animation: pulse 2s infinite;
        }
        
        ::-webkit-scrollbar {
            width: 6px;
        }
        
        ::-webkit-scrollbar-track {
            background: rgba(0, 20, 40, 0.5);
        }
        
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 240, 255, 0.3);
            border-radius: 3px;
        }
        
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 240, 255, 0.5);
        }