:root {
    --pwa-install-shadow: 0 20px 50px rgba(15, 23, 42, 0.22);
}

.pwa-install-banner {
    position: fixed;
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
    z-index: 1400;
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.1rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(59, 130, 246, 0.2);
    box-shadow: var(--pwa-install-shadow);
}

.pwa-install-banner.is-visible {
    display: flex;
}

.pwa-install-banner strong {
    display: block;
    font-size: 1rem;
    color: var(--primary-color, #1e3a8a);
}

.pwa-install-banner span {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted, #64748b);
    line-height: 1.5;
}

.pwa-install-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-shrink: 0;
}

.pwa-install-actions .btn {
    white-space: nowrap;
}

.pwa-close-button {
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: #64748b;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
}

.pwa-close-button:hover,
.pwa-close-button:focus-visible {
    background: #e2e8f0;
    color: #0f172a;
}

.pwa-update-toast {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1500;
    width: min(100%, 560px);
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.1rem;
    border-radius: 1rem;
    background: rgba(15, 23, 42, 0.96);
    color: #fff;
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.3);
}

.pwa-update-toast.is-visible {
    display: flex;
}

.pwa-update-toast p {
    margin: 0;
    line-height: 1.5;
}

.pwa-update-toast .btn {
    flex-shrink: 0;
}

.pwa-update-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.pwa-offline-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.16), transparent 28%),
        linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
}

.pwa-offline-card {
    width: min(100%, 520px);
    padding: 2rem;
    border-radius: 1.5rem;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(191, 219, 254, 0.9);
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.16);
    text-align: center;
}

.pwa-offline-card img {
    width: 112px;
    height: 112px;
    object-fit: contain;
    display: block;
    margin: 0 auto 1rem;
}

.pwa-offline-card h1 {
    margin: 0 0 0.6rem;
    color: var(--primary-color, #1e3a8a);
}

.pwa-offline-card p {
    margin: 0 0 1.5rem;
    color: var(--text-muted, #64748b);
    line-height: 1.7;
}

@media (max-width: 768px) {
    .pwa-install-banner,
    .pwa-update-toast {
        left: 0.75rem;
        right: 0.75rem;
        width: auto;
        transform: none;
        flex-direction: column;
        align-items: stretch;
    }

    .pwa-install-actions {
        justify-content: stretch;
    }

    .pwa-install-actions .btn {
        width: 100%;
    }
}