* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: linear-gradient(135deg, #0a1128, #001b38);
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            overflow: hidden;
            position: relative;
            color: #e0f7fa;
            padding: 20px;
        }
        
        .container {
            display: flex;
            flex-direction: column;
            width: 100%;
            max-width: 900px;
            background: rgba(5, 15, 35, 0.7);
            border-radius: 15px;
            box-shadow: 0 0 30px rgba(0, 100, 200, 0.4);
            overflow: hidden;
        }
        
        .header {
            padding: 15px 20px;
            background: rgba(0, 30, 60, 0.9);
            text-align: center;
            border-bottom: 1px solid rgba(100, 180, 255, 0.3);
        }
        
        .header h1 {
            font-size: 26px;
            color: #4fc3f7;
            text-shadow: 0 0 12px rgba(79, 195, 247, 0.6);
            margin-bottom: 5px;
        }
        
        .subtitle {
            font-size: 14px;
            color: #90a4ae;
            opacity: 0.7;
        }
        
        .main-content {
            display: flex;
            flex-direction: column;
            padding: 15px;
        }
        
        @media (min-width: 768px) {
            .main-content {
                flex-direction: row;
            }
        }
        
        .canvas-container {
            position: relative;
            flex: 1;
            min-height: 500px;
            border: 1px solid rgba(100, 180, 255, 0.2);
            border-radius: 10px;
            margin: 10px;
            background: rgba(0, 12, 24, 0.9);
            overflow: hidden;
        }
        
        canvas {
            display: block;
        }
        
        .ui-container {
            min-width: 250px;
            max-width: 300px;
            padding: 15px;
            background: rgba(0, 20, 40, 0.8);
            border-radius: 10px;
            border: 1px solid rgba(100, 180, 255, 0.15);
            margin: 10px;
        }
        
        .ui-section {
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px dashed rgba(100, 180, 255, 0.1);
        }
        
        .ui-section h3 {
            font-size: 18px;
            color: #81d4fa;
            margin-bottom: 15px;
            padding-bottom: 5px;
            border-bottom: 1px solid rgba(100, 180, 255, 0.2);
        }
        
        .control-group {
            margin: 12px 0;
        }
        
        .control-label {
            display: block;
            margin-bottom: 5px;
            font-size: 14px;
            color: #bbdefb;
        }
        
        .button-row {
            display: flex;
            gap: 10px;
            margin: 15px 0;
        }
        
        button {
            flex: 1;
            background: linear-gradient(to bottom, #0288d1, #01579b);
            color: white;
            border: none;
            border-radius: 6px;
            padding: 12px 15px;
            font-weight: bold;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 3px 8px rgba(0, 0, 0, 0.3);
        }
        
        button:hover {
            background: linear-gradient(to bottom, #039be5, #0277bd);
            transform: translateY(-2px);
            box-shadow: 0 5px 12px rgba(0, 0, 0, 0.4);
        }
        
        .btn-reset {
            background: linear-gradient(to bottom, #5d4037, #3e2723);
        }
        
        .btn-reset:hover {
            background: linear-gradient(to bottom, #795548, #4e342e);
        }
        
        input[type="range"] {
            width: 100%;
            height: 6px;
            background: rgba(100, 180, 255, 0.1);
            border-radius: 3px;
            outline: none;
            -webkit-appearance: none;
        }
        
        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: #4fc3f7;
            cursor: pointer;
            box-shadow: 0 0 8px rgba(79, 195, 247, 0.7);
        }
        
        .checkbox-group {
            display: flex;
            align-items: center;
            margin: 8px 0;
        }
        
        .checkbox-group input {
            margin-right: 10px;
        }
        
        .checkbox-group label {
            font-size: 14px;
            color: #bbdefb;
        }
        
        .footer {
            padding: 15px;
            text-align: center;
            font-size: 14px;
            color: #78909c;
            background: rgba(0, 20, 40, 0.9);
            border-top: 1px solid rgba(100, 180, 255, 0.2);
        }
        
        .version {
            margin-top: 5px;
            font-size: 12px;
            opacity: 0.7;
        }
        
        .info-label {
            position: absolute;
            z-index: 10;
            background: rgba(0, 20, 40, 0.7);
            padding: 5px 10px;
            border-radius: 4px;
            border: 1px solid rgba(100, 180, 255, 0.3);
            font-size: 14px;
            color: #bbdefb;
        }
        
        .info-label.sun {
            bottom: 20px;
            left: 20px;
        }
        
        .info-label.earth {
            top: 10px;
            right: 20px;
        }
        
        .info-label.moon {
            bottom: 20px;
            right: 20px;
        }