/**
 * The wait indicator of js/loader.js: a bar along the top of the screen and a spinner in the middle.
 * Neither takes taps, so the page stays usable under them, unless a blocking wait runs: then the transparent
 * layer takes every click from the first moment, before anything shows.
 */

.b-loader {
    --loader-color: var(--color-primary, #3276b1);
    --loader-disc: var(--card-bg, #fff);

    position: fixed;
    inset: 0;
    z-index: 2000;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity .15s, visibility 0s .15s;
}

.b-loader.active {
    visibility: visible;
    opacity: 1;
    transition: opacity .15s;
}

.b-loader.blocking {
    visibility: visible;
    pointer-events: auto;
    cursor: progress;
    transition: opacity .15s;
}

.b-loader-bar {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 3px;
    overflow: hidden;
}

.b-loader-bar::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: -40%;
    width: 40%;
    background: var(--loader-color);
    animation: b-loader-slide 1.1s ease-in-out infinite;
}

.b-loader-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 52px;
    height: 52px;
    margin: -26px 0 0 -26px;
    border-radius: 50%;
    background: var(--loader-disc);
    box-shadow: 0 2px 12px rgba(0, 0, 0, .16);
}

.b-loader-spinner::before {
    content: "";
    position: absolute;
    inset: 13px;
    border: 3px solid var(--loader-color);
    border-right-color: transparent;
    border-radius: 50%;
    animation: b-loader-spin .7s linear infinite;
}

@keyframes b-loader-slide {
    to {
        left: 100%;
    }
}

@keyframes b-loader-spin {
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .b-loader-bar::before {
        left: 0;
        width: 100%;
        animation: none;
        opacity: .6;
    }

    .b-loader-spinner::before {
        animation-duration: 2s;
    }
}