/* ==========================================================================
   JFL Loading system — brand loader, smart top bar, button loader, skeleton
   সব animation শুধু transform/opacity-তে (GPU-friendly, low-end device-safe).
   ========================================================================== */

/* ---------------- Brand loader (first paint only) ---------------- */
#jflBrandLoader {
    position: fixed;
    inset: 0;
    z-index: 10950;                 /* modal-এর নিচে, কনটেন্টের উপরে */
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(900px 420px at 50% 35%, #ffffff 0%, #f6faf9 70%, #eef5f4 100%);
    opacity: 0;
    visibility: hidden;
    transition: opacity .26s ease;
    pointer-events: none;
    contain: layout paint;
}
.jfl-brand-on #jflBrandLoader {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}
#jflBrandLoader .jfl-brand-inner {
    text-align: center;
    transform: translateY(0);
}
#jflBrandLoader img {
    width: 132px;
    height: auto;
    display: block;
    margin: 0 auto .55rem;
    border-radius: 6px;
}
#jflBrandLoader .jfl-brand-name {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: .01em;
    color: #0f172a;
    margin-bottom: .85rem;
}
#jflBrandLoader .jfl-brand-line {
    width: 168px;
    height: 3px;
    margin: 0 auto .55rem;
    border-radius: 999px;
    background: #dbe7e6;
    overflow: hidden;
}
#jflBrandLoader .jfl-brand-line span {
    display: block;
    width: 42%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #00b2a9, #2563eb);
    transform: translateX(-110%);
    animation: jfl-brand-slide 1.15s cubic-bezier(.4, 0, .2, 1) infinite;
}
#jflBrandLoader small {
    display: block;
    font-size: .72rem;
    color: #64748b;
    letter-spacing: .02em;
}

@keyframes jfl-brand-slide {
    0%   { transform: translateX(-110%); }
    100% { transform: translateX(360%); }
}

/* ---------------- Smart top bar (navigation / slow AJAX) ---------------- */
#jflTopBar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 10960;
    overflow: hidden;
    pointer-events: none;
    opacity: 0;
    transition: opacity .15s ease;
}
#jflTopBar.is-on { opacity: 1; }
#jflTopBar span {
    display: block;
    width: 38%;
    height: 100%;
    border-radius: 0 999px 999px 0;
    background: linear-gradient(90deg, #00b2a9, #2563eb);
    transform: translateX(-110%);
    animation: jfl-bar-slide 1.15s cubic-bezier(.4, 0, .2, 1) infinite;
}
@keyframes jfl-bar-slide {
    0%   { transform: translateX(-110%); }
    100% { transform: translateX(300%); }
}

/* ---------------- Button loader ---------------- */
.btn.is-loading,
.btn-jfl-gradient-primary.is-loading,
.btn-jfl-gradient-success.is-loading,
.btn-jfl-outline-primary.is-loading,
.btn-jfl-outline-warning.is-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
    cursor: progress;
}
.btn.is-loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1.05em;
    height: 1.05em;
    margin: -0.525em 0 0 -0.525em;
    border-radius: 50%;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-right-color: transparent;
    color: #fff;
    animation: jfl-spin .65s linear infinite;
}
.btn-outline-secondary.is-loading::after,
.btn-light.is-loading::after,
.btn-jfl-outline-primary.is-loading::after,
.btn-jfl-outline-warning.is-loading::after { color: #334155; }

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

/* ---------------- Skeleton ---------------- */
.jfl-skel {
    background: linear-gradient(90deg, #eef2f6 25%, #f7fafb 37%, #eef2f6 63%);
    background-size: 400% 100%;
    animation: jfl-skel-shine 1.2s ease-in-out infinite;
    border-radius: 8px;
    color: transparent !important;
    user-select: none;
}
.jfl-skel--line { height: .85rem; margin: .35rem 0; }
.jfl-skel--line.is-short { width: 55%; }
.jfl-skel--block { height: 90px; }
.jfl-skel--avatar { width: 40px; height: 40px; border-radius: 50%; }
@keyframes jfl-skel-shine {
    0%   { background-position: 100% 0; }
    100% { background-position: 0 0; }
}

/* ---------------- Section-level loader (opt-in) ---------------- */
.jfl-loading-target { position: relative; }
.jfl-loading-target::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 22px;
    height: 22px;
    margin: -11px 0 0 -11px;
    border-radius: 50%;
    border: 2px solid rgba(0, 178, 169, .25);
    border-top-color: #00b2a9;
    animation: jfl-spin .7s linear infinite;
    pointer-events: none;
}
.jfl-loading-target > * { opacity: .45; transition: opacity .15s ease; }

/* ---------------- Inline error + retry ---------------- */
.jfl-inline-error {
    margin: .5rem 0;
    padding: .6rem .75rem;
    border: 1px solid #fecaca;
    background: #fef2f2;
    border-radius: 10px;
    color: #991b1b;
    font-size: .82rem;
    display: flex;
    align-items: center;
    gap: .6rem;
    flex-wrap: wrap;
}
.jfl-inline-error__msg { flex: 1 1 auto; }
.jfl-inline-error__retry {
    border: 1px solid #fca5a5;
    background: #fff;
    color: #991b1b;
    border-radius: 999px;
    padding: .18rem .7rem;
    font-size: .78rem;
    font-weight: 600;
    cursor: pointer;
}
.jfl-inline-error__retry:hover { background: #fff1f2; }

/* ---------------- Instant press feedback ----------------
   ক্লিকের সাথে সাথেই হালকা গাঢ় হয় — transform নয়, তাই কোনো layout নড়ে না। */
.jfl-pressed { filter: brightness(.93); }
@media (prefers-reduced-motion: no-preference) {
    .jfl-pressed { transition: filter .08s ease; }
}

/* ---------------- Reduced motion ---------------- */
@media (prefers-reduced-motion: reduce) {
    #jflBrandLoader { transition: none; }
    #jflBrandLoader .jfl-brand-line span {
        animation: none;
        transform: none;
        width: 100%;
        opacity: .55;
    }
    #jflTopBar span {
        animation: none;
        transform: none;
        width: 100%;
        opacity: .55;
    }
    .btn.is-loading::after {
        animation: none;
        border-top-color: currentColor;
        border-right-color: currentColor;
        opacity: .7;
    }
    .jfl-skel { animation: none; }
    .jfl-loading-target::after { animation: none; }
    .jfl-loading-target > * { transition: none; }
}