html, body {
    background-color: #181828;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

#warning {
    background-color: yellow;
    font-size: small;
    display: none;
    padding: 1em;
    margin: 1em;
}

/* Loader container: full screen, centered, and above all content */
#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #121212; /* Dark background */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999; /* Ensure the loader is on top of everything */
}

/* Spinner styling */
.spinner {
    width: 60px;
    height: 60px;
    border: 8px solid #333; /* Dark gray ring */
    border-top: 8px solid #FFFFFF; /* Accent ring (white) */
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Spin animation */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Main application content, hidden by default */
#app {
    display: none;
}