/* PWA UI: capa mínima y no invasiva. */
.pwa-install-button,
.pwa-update-button {
    position: fixed;
    right: max(18px, env(safe-area-inset-right));
    bottom: max(18px, env(safe-area-inset-bottom));
    z-index: 1095;
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    min-height: 44px;
    padding: .68rem .95rem;
    border: 1px solid rgba(255,255,255,.16);
    border-radius: 999px;
    background: #0b4aa0;
    color: #fff;
    font: 700 .83rem/1 system-ui,-apple-system,"Segoe UI",sans-serif;
    box-shadow: 0 12px 30px rgba(15,23,42,.22);
    cursor: pointer;
    transition: transform .16s ease, box-shadow .16s ease, opacity .16s ease;
}
.pwa-install-button:hover,
.pwa-update-button:hover { transform: translateY(-1px); box-shadow: 0 16px 34px rgba(15,23,42,.28); }
.pwa-install-button:focus-visible,
.pwa-update-button:focus-visible { outline: 3px solid rgba(59,130,246,.35); outline-offset: 3px; }
.pwa-install-button svg,
.pwa-update-button svg { width: 18px; height: 18px; flex: 0 0 auto; }
.pwa-update-button { background: #0f766e; }

.pwa-status-toast {
    position: fixed;
    left: 50%;
    bottom: max(20px, env(safe-area-inset-bottom));
    z-index: 1100;
    transform: translate(-50%, 14px);
    max-width: min(92vw, 520px);
    padding: .72rem 1rem;
    border-radius: 12px;
    background: #111827;
    color: #fff;
    font: 600 .84rem/1.35 system-ui,-apple-system,"Segoe UI",sans-serif;
    box-shadow: 0 16px 36px rgba(15,23,42,.28);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
}
.pwa-status-toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
.pwa-status-toast.is-warning { background: #92400e; }
.pwa-status-toast.is-success { background: #166534; }

.pwa-ios-help {
    position: fixed;
    inset: 0;
    z-index: 1110;
    display: grid;
    place-items: center;
    padding: 22px;
    background: rgba(15,23,42,.48);
    backdrop-filter: blur(3px);
}
.pwa-ios-help[hidden] { display: none !important; }
.pwa-ios-help__card {
    width: min(92vw, 420px);
    border-radius: 18px;
    background: #fff;
    color: #172033;
    padding: 24px;
    box-shadow: 0 20px 55px rgba(15,23,42,.24);
}
.pwa-ios-help__card h2 { margin: 0 0 10px; font-size: 1.15rem; }
.pwa-ios-help__card p { margin: 0 0 16px; color: #64748b; line-height: 1.5; }
.pwa-ios-help__card button { border: 0; border-radius: 10px; background:#0b4aa0; color:#fff; font-weight:700; padding:10px 14px; cursor:pointer; }

@media (display-mode: standalone) {
    html { min-height: calc(100% + env(safe-area-inset-top)); }
    body { padding-bottom: env(safe-area-inset-bottom); }
    .pwa-install-button { display: none !important; }
}

@media (max-width: 575.98px) {
    .pwa-install-button,
    .pwa-update-button { right: max(12px, env(safe-area-inset-right)); bottom: max(12px, env(safe-area-inset-bottom)); }
}

@media (prefers-reduced-motion: reduce) {
    .pwa-install-button,
    .pwa-update-button,
    .pwa-status-toast { transition: none; }
}