.submission-guard-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 2147483647;
    width: 0;
    height: 4px;
    background: #18a999;
    box-shadow: 0 0 10px rgba(24, 169, 153, .7);
    opacity: 0;
    transition: width .25s ease, opacity .2s ease;
}

.submission-guard-progress.is-visible {
    opacity: 1;
}

.submission-guard-mask {
    position: fixed;
    inset: 0;
    z-index: 2147483646;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, .68);
    cursor: wait;
}

.submission-guard-mask[hidden] {
    display: none;
}

.submission-guard-status {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 190px;
    padding: 16px 22px;
    border-radius: 8px;
    background: rgba(34, 47, 62, .94);
    color: #fff;
    font-size: 16px;
    line-height: 1.4;
    box-shadow: 0 8px 28px rgba(0, 0, 0, .2);
}

.submission-guard-spinner {
    width: 22px;
    height: 22px;
    flex: 0 0 22px;
    border: 3px solid rgba(255, 255, 255, .35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: submission-guard-spin .75s linear infinite;
}

body.submission-guard-active {
    overflow: hidden;
}

@keyframes submission-guard-spin {
    to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
    .submission-guard-progress { transition: none; }
    .submission-guard-spinner { animation-duration: 1.5s; }
}