* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        background: radial-gradient(circle at center, #1a1a2e 0%, #16213e 50%, #0f0f0f 100%);
        font-family: 'Arial', sans-serif;
        overflow: hidden;
        color: white;
    }

    #canvas-container {
        position: relative;
        width: 100vw;
        height: 100vh;
    }

    #loading-screen {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 50%, #16213e 100%);
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 9999;
        transition: opacity 0.5s ease-out;
    }

    .loading-content {
        text-align: center;
        color: white;
    }

    .loading-content h2 {
        margin-bottom: 20px;
        font-size: 2em;
        background: linear-gradient(45deg, #4CAF50, #2196F3, #ff9800);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .loading-bar {
        width: 300px;
        height: 6px;
        background-color: #333;
        border-radius: 3px;
        margin: 20px auto;
        overflow: hidden;
    }

    .loading-progress {
        height: 100%;
        background: linear-gradient(90deg, #4CAF50, #2196F3, #ff9800);
        width: 0%;
        transition: width 0.3s ease;
        animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
        0%, 100% { opacity: 1; }
        50% { opacity: 0.7; }
    }

    .loading-screen.hidden {
        opacity: 0;
        pointer-events: none;
    }

    .controls {
        position: fixed;
        top: 20px;
        left: 20px;
        background: rgba(0, 0, 0, 0.8);
        padding: 20px;
        border-radius: 10px;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        z-index: 1000;
    }

    .controls h3 {
        margin-bottom: 15px;
        color: #4CAF50;
    }

    .control-group {
        margin-bottom: 15px;           
    }

    .control-group label {
        display: block;
        margin-bottom: 5px;
        font-size: 0.9em;
    }

    .control-group input, .control-group select {
        width: 150px;
        padding: 5px;
        border: none;
        border-radius: 5px;
        background: rgba(255, 255, 255, 0.1);
        color: white;
    }

    .planet-info {
        position: fixed;
        bottom: 20px;
        left: 20px;
        background: rgba(0, 0, 0, 0.9);
        padding: 20px;
        border-radius: 10px;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        max-width: 350px;
        z-index: 1000;
        transform: translateY(100%);
        transition: transform 0.3s ease;
    }

    .planet-info.active {
        transform: translateY(0);
    }

    .planet-info h3 {
        color: #ff9800;
        margin-bottom: 10px;
        text-transform: capitalize;
    }

    .info-item {
        margin-bottom: 8px;
        font-size: 0.9em;
    }

    .info-item strong {
        color: #4CAF50;
    }

    .toggle-btn {
        background: linear-gradient(45deg, #4CAF50, #2196F3);
        border: none;
        color: white;
        padding: 8px 15px;
        border-radius: 5px;
        cursor: pointer;
        margin-top: 10px;
        transition: transform 0.2s;
    }

    .toggle-btn:hover {
        transform: scale(1.05);
    }

    .instructions {
        position: fixed;
        bottom: 20px;
        right: 20px;
        background: rgba(0, 0, 0, 0.8);
        padding: 15px;
        border-radius: 10px;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        font-size: 0.8em;
        z-index: 1000;
    }

    @media (max-width: 768px) {
        .controls, .planet-info, .instructions {
            position: relative;
            margin: 10px;
            width: calc(100vw - 20px);
        }

        .controls {
            top: auto;
            left: auto;
        }
    }