body {
    background-attachment: fixed;
    margin: 0;
    background-color: black;
    color: white;
}

#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #f5f5f5;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.5s ease-out;
}

#loading-screen.dark-theme {
    background-color: #333;
    color: #fff;
}

.loader {
    width: 48px;
    height: 48px;
    border: 5px solid #333;
    border-bottom-color: transparent;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
}

.dark-theme .loader {
    border-color: #f5f5f5;
    border-bottom-color: transparent;
}

@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.app-title {
    margin-top: 20px;
    font-family: Arial, sans-serif;
    font-size: 24px;
    font-weight: bold;
}

.loading-text {
    margin-top: 10px;
    font-family: Arial, sans-serif;
    font-size: 16px;
}

/* Hide canvas initially */
#canvas {
    opacity: 0;
    transition: opacity 0.5s ease-in;
}

#canvas.loaded {
    opacity: 1;
}