/* ================================================================== */
/*  Page transition loader — shared component                          */
/*                                                                     */
/*  Canonical loader chrome used by every layout (dashboard, portal,   */
/*  future tech portal). Markup emitted by                             */
/*  app/Views/twig/components/page-loader.html.twig; visibility        */
/*  driven by the SPS.pageLoader API in public/assets/js/core.js.      */
/*                                                                     */
/*  Rendered visible by default (class .sps-page-loader alone);        */
/*  SPS.pageLoader.hide() toggles .sps-page-loader--hidden to fade     */
/*  out (with a minimum-visible window so fast loads don't flicker)    */
/*  and adds .d-none once the fade completes so the overlay stops      */
/*  intercepting clicks entirely.                                      */
/*                                                                     */
/*  Animation vocabulary:                                              */
/*    - Horizontal light streamers sweep across the viewport           */
/*    - Center lightning bolt pulses and rocks with a subtle rotate    */
/*    - Accent-color drop-shadow intensifies with the pulse            */
/*                                                                     */
/*  Reduced-motion users get the static layout only — OS preference    */
/*  is honoured via prefers-reduced-motion.                            */
/*                                                                     */
/*  Theme tokens consumed:                                             */
/*    --sps-main-bg            overlay background                      */
/*    --sps-accent             streamers + bolt color                  */
/*    --sps-accent-glow-soft   resting bolt glow                       */
/*    --sps-accent-glow-strong peak bolt glow                          */
/*  Layouts that don't define all four can provide fallbacks on the    */
/*  parent element or scope the loader inside a themed wrapper.        */
/* ================================================================== */

.sps-page-loader {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--sps-main-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.35s ease;
}

.sps-page-loader--hidden {
    opacity: 0;
    pointer-events: none;
}

.sps-page-loader__streamers {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.sps-page-loader__streamer {
    position: absolute;
    left: -20%;
    width: 140%;
    height: 2px;
    background: linear-gradient(
        to right,
        transparent 0%,
        var(--sps-accent) 50%,
        transparent 100%
    );
    opacity: 0;
    animation: sps-page-loader-streamer 1.6s ease-in-out infinite;
}

.sps-page-loader__streamer:nth-child(1) {
    top: 32%;
    animation-delay: 0s;
}

.sps-page-loader__streamer:nth-child(2) {
    top: 50%;
    animation-delay: 0.3s;
    height: 3px;
}

.sps-page-loader__streamer:nth-child(3) {
    top: 68%;
    animation-delay: 0.6s;
}

@keyframes sps-page-loader-streamer {
    0%   { transform: translateX(-40%); opacity: 0; }
    30%  { opacity: 0.85; }
    100% { transform: translateX(40%); opacity: 0; }
}

.sps-page-loader__core {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sps-page-loader__bolt {
    width: 6rem;
    height: 6rem;
    color: var(--sps-accent);
    filter: drop-shadow(0 0 22px var(--sps-accent-glow-soft));
    animation: sps-page-loader-pulse 1.2s ease-in-out infinite;
    transform-origin: center;
}

/* Compact variant — scoped loader for modals/sections. */
.sps-page-loader--compact {
    position: absolute;
    z-index: 10;
    background: transparent;
}

.sps-page-loader--compact .sps-page-loader__bolt {
    width: 3rem;
    height: 3rem;
}

.sps-page-loader--compact .sps-page-loader__streamers {
    display: none;
}

@keyframes sps-page-loader-pulse {
    0%, 100% {
        transform: scale(1) rotate(-3deg);
        filter: drop-shadow(0 0 22px var(--sps-accent-glow-soft));
    }
    50% {
        transform: scale(1.18) rotate(6deg);
        filter: drop-shadow(0 0 40px var(--sps-accent-glow-strong));
    }
}

@media (prefers-reduced-motion: reduce) {
    .sps-page-loader__bolt,
    .sps-page-loader__streamer {
        animation: none;
    }
    .sps-page-loader {
        transition: none;
    }
}