.bac-connectivity-overlay {
    position: fixed;
    z-index: 2147483647;
    inset: 0;
    display: grid;
    place-items: center;
    box-sizing: border-box;
    padding:
        max(24px, env(safe-area-inset-top))
        max(20px, env(safe-area-inset-right))
        max(24px, env(safe-area-inset-bottom))
        max(20px, env(safe-area-inset-left));
    overflow: auto;
    color: var(--bac-text, #172033);
    background:
        radial-gradient(circle at top, rgba(70, 123, 255, .18), transparent 42%),
        rgba(245, 248, 253, .98);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    touch-action: pan-y;
    overscroll-behavior: contain;
}

.bac-connectivity-overlay[hidden] {
    display: none !important;
}

.bac-connectivity-card {
    width: min(100%, 430px);
    box-sizing: border-box;
    padding: clamp(28px, 7vw, 42px);
    text-align: center;
    border: 1px solid rgba(23, 32, 51, .08);
    border-radius: 28px;
    background: var(--bac-surface, #fff);
    box-shadow: 0 24px 70px rgba(23, 32, 51, .16);
}

.bac-connectivity-icon {
    display: grid;
    place-items: center;
    width: 72px;
    height: 72px;
    margin: 0 auto 22px;
    color: var(--bac-primary, #315ec9);
    border-radius: 24px;
    background: rgba(49, 94, 201, .1);
}

.bac-connectivity-icon svg {
    width: 42px;
    height: 42px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.bac-connectivity-card h1 {
    margin: 0;
    color: inherit;
    font: 700 clamp(1.45rem, 5vw, 1.8rem)/1.2 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.bac-connectivity-card > p {
    margin: 12px 0 0;
    color: var(--bac-muted, #657086);
    font: 400 1rem/1.55 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.bac-connectivity-progress {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 44px;
    margin: 22px 0 18px;
    color: var(--bac-muted, #657086);
    font: 500 .9rem/1.35 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.bac-connectivity-spinner {
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
    box-sizing: border-box;
    border: 2px solid rgba(49, 94, 201, .22);
    border-top-color: var(--bac-primary, #315ec9);
    border-radius: 50%;
    animation: bac-connectivity-spin .8s linear infinite;
}

#bac-connectivity-retry {
    width: 100%;
    min-height: 50px;
    padding: 12px 20px;
    color: #fff;
    font: 700 1rem/1.2 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    border: 0;
    border-radius: 14px;
    background: var(--bac-primary, #315ec9);
    box-shadow: 0 10px 24px rgba(49, 94, 201, .24);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

#bac-connectivity-retry:active {
    transform: translateY(1px);
}

#bac-connectivity-retry:focus-visible {
    outline: 3px solid rgba(49, 94, 201, .35);
    outline-offset: 3px;
}

#bac-connectivity-preserved {
    display: block;
    margin-top: 16px;
    color: var(--bac-muted, #657086);
    font: 400 .8rem/1.4 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.bac-connectivity-blocked {
    overflow: hidden !important;
}

body.bac-connectivity-blocked .bac-dialog {
    z-index: 2147483600 !important;
}

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

@media (prefers-color-scheme: dark) {
    .bac-connectivity-overlay {
        color: var(--bac-text, #f2f5fb);
        background:
            radial-gradient(circle at top, rgba(85, 130, 255, .2), transparent 42%),
            rgba(13, 18, 29, .98);
    }

    .bac-connectivity-card {
        border-color: rgba(255, 255, 255, .08);
        background: var(--bac-surface, #171e2d);
        box-shadow: 0 24px 70px rgba(0, 0, 0, .42);
    }

    .bac-connectivity-card > p,
    .bac-connectivity-progress,
    #bac-connectivity-preserved {
        color: var(--bac-muted, #aeb8cb);
    }
}

@media (prefers-reduced-motion: reduce) {
    .bac-connectivity-spinner {
        animation-duration: 1.8s;
    }
}