:root { color-scheme: light dark; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    background: #f8fafc;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
    html, body { background: #0b1220; }
}

/* The ComposeViewport container: fill the visual viewport, no scrollbars. */
#app {
    position: fixed;
    inset: 0;
    outline: none;
}

#loading {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: #475569;
    z-index: 10;
}
@media (prefers-color-scheme: dark) {
    #loading { color: #94a3b8; }
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(37, 99, 235, 0.25);
    border-top-color: #2563eb;
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
    .spinner { animation: none; }
}