.top-loading-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 2000;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.top-loading-bar--active,
.top-loading-bar--complete {
    opacity: 1;
}

.top-loading-bar__fill {
    position: relative;
    height: 100%;
    width: 100%;
    overflow: hidden;
    transform: scaleX(0);
    transform-origin: left center;
    background: linear-gradient(90deg, var(--accent-dark), var(--accent), var(--accent-light));
    box-shadow: 0 0 6px var(--accent);
}

.top-loading-bar__fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.55), transparent);
    width: 40%;
    transform: translateX(-120%);
    animation: top-loading-bar-shimmer 1.6s ease-in-out infinite;
}

.top-loading-bar__fill::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 18px;
    background: radial-gradient(circle, var(--accent-light) 0%, transparent 70%);
    opacity: 0;
    transform: translateX(0);
}

.top-loading-bar--active .top-loading-bar__fill {
    transform: scaleX(0.82);
    transition: transform 2.2s cubic-bezier(0.11, 0.79, 0.29, 1);
}

.top-loading-bar--active .top-loading-bar__fill::before {
    opacity: 1;
    animation: top-loading-bar-push 1.6s cubic-bezier(0.45, 0, 0.55, 1) 2.2s infinite;
}

.top-loading-bar--complete .top-loading-bar__fill {
    transform: scaleX(1);
    transition: transform 0.2s ease-out;
}

.top-loading-bar--complete .top-loading-bar__fill::before,
.top-loading-bar--complete .top-loading-bar__fill::after {
    animation: none;
    opacity: 0;
}

@keyframes top-loading-bar-shimmer {
    0% {
        transform: translateX(-120%);
    }
    100% {
        transform: translateX(280%);
    }
}

@keyframes top-loading-bar-push {
    0%,
    18% {
        transform: translateX(0);
        opacity: 0.55;
    }
    40% {
        transform: translateX(5px);
        opacity: 1;
    }
    60% {
        transform: translateX(-1px);
        opacity: 0.85;
    }
    100% {
        transform: translateX(0);
        opacity: 0.55;
    }
}

@media (prefers-reduced-motion: reduce) {
    .top-loading-bar__fill,
    .top-loading-bar__fill::after,
    .top-loading-bar__fill::before {
        transition: none;
        animation: none;
    }

    .top-loading-bar--active .top-loading-bar__fill,
    .top-loading-bar--complete .top-loading-bar__fill {
        transform: scaleX(1);
    }
}