/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

/* Canvas - Full Screen */
#renderCanvas {
    width: 100%;
    height: 100%;
    display: block;
    touch-action: none;
    outline: none;
}

/* Loading Overlay */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader {
    text-align: center;
    color: #fff;
}

.spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: #00d4ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loader p {
    font-size: 1.2rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.5px;
}

/* Controls Info Panel */
#controls-info {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 15px 30px;
    border-radius: 15px;
    color: #fff;
    text-align: center;
    z-index: 10;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#controls-info p {
    margin: 5px 0;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
}

#controls-info p strong {
    color: #00d4ff;
}

#controls-info .animation-status {
    font-style: italic;
    color: #7dd3fc;
    font-size: 0.85rem;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    #controls-info {
        padding: 12px 20px;
        bottom: 15px;
        width: calc(100% - 30px);
        border-radius: 12px;
    }
    
    #controls-info p {
        font-size: 0.8rem;
    }
}