/* ─────────────────────────────────────────────
   QuantumBlox · Loading animations (compartido)
   Usado en: checkout wizard, auth modal, home vouches
   ───────────────────────────────────────────── */

/* Spinner básico inline (botones / estados) */
.qb-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,.2);
    border-top-color: #fff;
    border-radius: 50%;
    animation: qb-spin .7s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
}
.qb-spinner.lg { width: 32px; height: 32px; border-width: 3px; }
.qb-spinner.primary { border-top-color: #a855f7; }

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

/* Botón en estado de carga: spinner interno + texto oculto */
.qb-btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
    opacity: .8;
}
.qb-btn-loading::after {
    content: '';
    position: absolute;
    left: 50%; top: 50%;
    width: 18px; height: 18px;
    margin: -9px 0 0 -9px;
    border: 2px solid rgba(255,255,255,.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: qb-spin .7s linear infinite;
}

/* Overlay pantalla completa (login, OAuth popup wait) */
.qb-loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15,15,35,.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    flex-direction: column;
    gap: 14px;
    color: #fff;
}
.qb-loading-overlay.active { display: flex; }
.qb-loading-overlay .qb-spinner.lg { border-top-color: #a855f7; }

/* Skeleton shimmer (vouches / cards) */
.qb-skeleton {
    background: linear-gradient(90deg, rgba(255,255,255,.04) 0%, rgba(255,255,255,.08) 50%, rgba(255,255,255,.04) 100%);
    background-size: 200% 100%;
    animation: qb-shimmer 1.4s ease-in-out infinite;
    border-radius: 12px;
}
@keyframes qb-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Transición de paso del wizard (slide right → center) */
.qb-step-transition {
    animation: qb-step-in .28s ease;
}
@keyframes qb-step-in {
    from { opacity: 0; transform: translateX(18px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Fade de validación (check verde / cruz roja) */
.qb-fade-in {
    animation: qb-fade-in .25s ease both;
}
@keyframes qb-fade-in {
    from { opacity: 0; transform: scale(.96); }
    to { opacity: 1; transform: scale(1); }
}

/* Multi-step loader inspirado en Aceternity, adaptado a vanilla JS. */
.qb-multi-loader {
    width: min(420px, calc(100vw - 36px));
    padding: 26px 24px;
    border: 1px solid rgba(192,132,252,.22);
    border-radius: 24px;
    background:
        radial-gradient(circle at 50% 0, rgba(168,85,247,.18), transparent 46%),
        rgba(13,9,22,.94);
    box-shadow: 0 28px 90px rgba(0,0,0,.58), inset 0 1px 0 rgba(255,255,255,.08);
}
.qb-multi-loader-title {
    margin: 0 0 20px;
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    text-align: center;
}
.qb-loader-steps {
    display: flex;
    flex-direction: column;
}
.qb-loader-step {
    position: relative;
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 12px;
    min-height: 54px;
    color: rgba(235,229,244,.42);
    transition: color .25s ease, opacity .25s ease;
}
.qb-loader-step:not(:last-child)::after {
    content: "";
    position: absolute;
    left: 16px;
    top: 31px;
    bottom: -1px;
    width: 2px;
    background: rgba(255,255,255,.09);
}
.qb-loader-step.is-complete:not(:last-child)::after {
    background: linear-gradient(#a855f7, #d946ef);
}
.qb-loader-dot {
    position: relative;
    z-index: 1;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 50%;
    background: #17111f;
    color: rgba(255,255,255,.5);
    font-size: 12px;
    font-weight: 800;
    transition: .25s ease;
}
.qb-loader-step.is-active { color: #fff; }
.qb-loader-step.is-active .qb-loader-dot {
    border-color: rgba(216,180,254,.8);
    color: #fff;
    background: linear-gradient(135deg, #7c3aed, #d946ef);
    box-shadow: 0 0 0 7px rgba(168,85,247,.12), 0 0 28px rgba(168,85,247,.42);
    animation: qbLoaderPulse 1.25s ease-in-out infinite;
}
.qb-loader-step.is-complete { color: rgba(255,255,255,.78); }
.qb-loader-step.is-complete .qb-loader-dot {
    border-color: rgba(34,255,136,.45);
    color: #07130d;
    background: #22ff88;
}
.qb-loader-step.is-error { color: #fecaca; }
.qb-loader-step.is-error .qb-loader-dot {
    border-color: rgba(248,113,113,.7);
    color: #fff;
    background: #dc2626;
    box-shadow: 0 0 24px rgba(239,68,68,.28);
}
.qb-loader-copy {
    padding: 5px 0 15px;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
}
.qb-loader-copy small {
    display: block;
    margin-top: 3px;
    color: rgba(255,255,255,.4);
    font-size: 11px;
    font-weight: 500;
}
.qb-loader-step.is-active .qb-loader-copy small,
.qb-loader-step.is-complete .qb-loader-copy small { color: rgba(255,255,255,.58); }
@keyframes qbLoaderPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}
@media (max-width: 480px) {
    .qb-multi-loader { padding: 22px 18px; border-radius: 20px; }
    .qb-loader-copy { font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
    .qb-loader-step.is-active .qb-loader-dot { animation: none; }
}