/* Global top progress — determinate strip, blue tones */
#site-busy-bar {
    --site-busy-blue-deep: #1d4ed8;
    --site-busy-blue: #2563eb;
    --site-busy-blue-light: #60a5fa;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 99999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
    overflow: hidden;
    background: rgba(37, 99, 235, 0.12);
}

#site-busy-bar.site-busy-visible {
    opacity: 1;
}

#site-busy-bar-inner {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    transform-origin: left center;
    transform: scaleX(0);
    will-change: transform;
    border-radius: 0 2px 2px 0;
    background: linear-gradient(
        90deg,
        var(--site-busy-blue-deep) 0%,
        var(--site-busy-blue) 45%,
        var(--site-busy-blue-light) 100%
    );
    box-shadow: 0 0 12px rgba(37, 99, 235, 0.55);
    transition: transform 0.35s cubic-bezier(0.33, 1, 0.68, 1);
}

#site-busy-bar-inner.site-busy-finish {
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Button inline spinner */
.site-busy-btn-spinner {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: site-busy-spin 0.65s linear infinite;
}

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

.site-busy-btn-loading {
    pointer-events: none;
    opacity: 0.88;
}

.site-busy-spin-slot,
.site-busy-inline-spin {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
}