.startup-loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: inline-flex;
    align-items: center;
    padding: 0.9rem 1.15rem;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
    backdrop-filter: blur(2px);
}

.startup-loading .spinner-border {
    width: 1.25rem;
    height: 1.25rem;
    border-width: 0.17em;
}

.startup-loading span {
    font-size: 0.95rem;
    font-weight: 500;
    color: #475569 !important;
}

@media (prefers-color-scheme: dark) {
    .startup-loading {
        background: rgba(15, 23, 42, 0.85);
        box-shadow: 0 12px 28px rgba(2, 6, 23, 0.45);
    }

    .startup-loading span {
        color: #cbd5e1 !important;
    }
}