/* Loading feedback on creator pages (change creator-loading-feedback, issue #337):
 * the top progress bar and the busy state of submit buttons. Driven by
 * js/loading_feedback.js; included once per creator base template through
 * partials/_loading_feedback.html. Respondent pages do not load this. */

/* ── top progress bar ── */
/* z-index above Bootstrap modals (1050) and the mobile editor overlays (700/800):
   a form submitted from inside a modal must still show its bar. */
.ms-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 2000;
    pointer-events: none;
    opacity: 0;
    transition: opacity .2s ease;
}
.ms-progress.is-visible { opacity: 1; }
.ms-progress.is-leaving { opacity: 0; transition: opacity .3s ease .15s; }
.ms-progress__bar {
    height: 100%;
    width: 0;
    background: #4f46e5;
    box-shadow: 0 0 8px rgba(79, 70, 229, .6);
    transition: width .25s ease;
}
.ms-progress.is-leaving .ms-progress__bar { transition: width .1s ease; }
@media (prefers-reduced-motion: reduce) {
    .ms-progress, .ms-progress__bar { transition: none; }
}

/* ── busy submit button ── */
/* The label stays, the leading icon becomes a spinner, so the button keeps its
   width and its meaning. `disabled` does the greying through Bootstrap. */
.is-busy { cursor: progress !important; }
.is-busy .ms-busy-spinner { margin-right: .35em; }