@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;600&display=swap');
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Montserrat', sans-serif;
        }
        
        body {
            overflow: hidden;
            background-color: #000;
            color: #fff;
        }
        
        #canvas-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
        }
        
        .ui-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 10;
        }
        
        .header {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            padding: 1rem;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 20;
        }
        
        .title {
            font-size: 1.5rem;
            font-weight: 600;
            color: #fff;
            text-shadow: 0 0 10px rgba(100, 180, 255, 0.8);
        }
        
        .controls-panel {
            position: absolute;
            bottom: 1rem;
            left: 1rem;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            padding: 1rem;
            border-radius: 0.5rem;
            border: 1px solid rgba(100, 180, 255, 0.3);
            pointer-events: auto;
            z-index: 20;
            max-height: 80vh;
            overflow-y: auto;
        }
        
        .info-panel {
            position: absolute;
            top: 5rem;
            right: 1rem;
            width: 300px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            padding: 1rem;
            border-radius: 0.5rem;
            border: 1px solid rgba(100, 180, 255, 0.3);
            transition: all 0.3s ease;
            z-index: 20;
            max-height: 80vh;
            overflow-y: auto;
        }
        
        .planet-name {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #64b4ff;
        }
        
        .planet-info {
            font-size: 0.9rem;
            line-height: 1.4;
            margin-bottom: 1rem;
        }
        
        .planet-data {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.5rem;
            font-size: 0.8rem;
        }
        
        .planet-data div {
            padding: 0.3rem;
            background: rgba(100, 180, 255, 0.1);
            border-radius: 0.3rem;
        }
        
        .planet-data span {
            font-weight: 600;
            color: #64b4ff;
        }
        
        .button {
            background: rgba(100, 180, 255, 0.2);
            border: 1px solid rgba(100, 180, 255, 0.5);
            color: #fff;
            padding: 0.5rem 1rem;
            border-radius: 0.3rem;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            cursor: pointer;
            transition: all 0.2s ease;
            pointer-events: auto;
        }
        
        .button:hover {
            background: rgba(100, 180, 255, 0.4);
        }
        
        .button.active {
            background: rgba(100, 180, 255, 0.6);
        }
        
        .tooltip {
            position: absolute;
            background: rgba(0, 0, 0, 0.8);
            border: 1px solid rgba(100, 180, 255, 0.5);
            padding: 0.5rem;
            border-radius: 0.3rem;
            font-size: 0.8rem;
            pointer-events: none;
            z-index: 100;
            transition: opacity 0.2s ease;
        }
        
        .distance-line {
            position: absolute;
            height: 1px;
            background: rgba(255, 255, 255, 0.5);
            transform-origin: left center;
            pointer-events: none;
        }
        
        .distance-label {
            position: absolute;
            background: rgba(0, 0, 0, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 0.3rem;
            border-radius: 0.3rem;
            font-size: 0.7rem;
            pointer-events: none;
            white-space: nowrap;
        }
        
        .help-button {
            position: absolute;
            bottom: 1rem;
            right: 1rem;
            width: 40px;
            height: 40px;
            background: rgba(100, 180, 255, 0.2);
            border: 1px solid rgba(100, 180, 255, 0.5);
            color: #fff;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.2rem;
            cursor: pointer;
            pointer-events: auto;
            transition: all 0.2s ease;
            z-index: 20;
        }
        
        .help-button:hover {
            background: rgba(100, 180, 255, 0.4);
        }
        
        .help-panel {
            position: absolute;
            bottom: 5rem;
            right: 1rem;
            width: 300px;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(10px);
            padding: 1rem;
            border-radius: 0.5rem;
            border: 1px solid rgba(100, 180, 255, 0.3);
            font-size: 0.9rem;
            transform: translateY(20px);
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s ease;
            z-index: 20;
        }
        
        .help-panel.visible {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        
        .help-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #64b4ff;
        }
        
        .help-content {
            line-height: 1.4;
        }
        
        .help-content p {
            margin-bottom: 0.5rem;
        }
        
        .orbital-info {
            position: absolute;
            left: 50%;
            bottom: 1rem;
            transform: translateX(-50%);
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            padding: 1rem;
            border-radius: 0.5rem;
            border: 1px solid rgba(100, 180, 255, 0.3);
            text-align: center;
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 20;
        }
        
        .orbital-info.visible {
            opacity: 1;
        }
        
        .loading-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: #000;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            transition: opacity 1s ease;
        }
        
        .loading-title {
            font-size: 2rem;
            font-weight: 600;
            margin-bottom: 2rem;
            color: #64b4ff;
            text-shadow: 0 0 10px rgba(100, 180, 255, 0.8);
        }
        
        .loading-spinner {
            width: 50px;
            height: 50px;
            border: 3px solid rgba(100, 180, 255, 0.3);
            border-top: 3px solid #64b4ff;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        .planet-groups {
            margin-top: 1rem;
            margin-bottom: 0.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        
        .planet-scale-slider {
            width: 100%;
            margin: 0.5rem 0;
            pointer-events: auto;
        }
        
        .scale-labels {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            margin-bottom: 1rem;
        }
        
        .toggle-switch {
            display: flex;
            align-items: center;
            margin: 1rem 0;
        }
        
        .toggle-switch label {
            margin-left: 0.5rem;
        }
        
        .switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
            pointer-events: auto;
        }
        
        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        
        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(100, 180, 255, 0.2);
            transition: .4s;
            border-radius: 24px;
        }
        
        .slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }
        
        input:checked + .slider {
            background-color: rgba(100, 180, 255, 0.6);
        }
        
        input:checked + .slider:before {
            transform: translateX(26px);
        }
        
        .date-display {
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
            border: 1px solid rgba(100, 180, 255, 0.3);
            position: absolute;
            top: 5rem;
            left: 1rem;
            font-size: 0.9rem;
            z-index: 20;
        }
        
        .planet-category {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #64b4ff;
        }
        
        .planet-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        @media (max-width: 768px) {
            .info-panel {
                width: 250px;
                font-size: 0.8rem;
            }
            
            .controls-panel {
                max-width: 300px;
            }
            
            .button {
                padding: 0.4rem 0.8rem;
                font-size: 0.8rem;
            }
            
            .header {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .header > div:last-child {
                margin-top: 0.5rem;
                display: flex;
                flex-wrap: wrap;
            }
        }