.pwa-install-button {
    position: fixed;
    left: max(16px, env(safe-area-inset-left));
    bottom: max(16px, env(safe-area-inset-bottom));
    z-index: 9998;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 46px;
    height: 46px;
    padding: 0 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.96), rgba(14, 165, 233, 0.96));
    color: #ffffff;
    box-shadow: 0 14px 32px rgba(15, 23, 42, 0.22);
    cursor: pointer;
    opacity: 0;
    transform: translateY(10px) scale(0.96);
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease, box-shadow 180ms ease;
    font-family: inherit;
    font-size: 13px;
    font-weight: 800;
    line-height: 1;
    -webkit-tap-highlight-color: transparent;
}

.pwa-install-button.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.pwa-install-button:hover,
.pwa-install-button:focus-visible {
    box-shadow: 0 18px 40px rgba(37, 99, 235, 0.35);
    outline: none;
}

.pwa-install-button:disabled {
    cursor: wait;
    opacity: 0.72;
}

.pwa-install-button svg {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
}

.pwa-install-sheet {
    position: fixed;
    left: max(16px, env(safe-area-inset-left));
    right: max(16px, env(safe-area-inset-right));
    bottom: calc(max(16px, env(safe-area-inset-bottom)) + 58px);
    z-index: 9998;
    max-width: 360px;
    margin-right: auto;
    padding: 14px 16px;
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.96);
    color: #0f172a;
    box-shadow: 0 18px 44px rgba(15, 23, 42, 0.18);
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
    direction: rtl;
    text-align: right;
    backdrop-filter: blur(14px);
}

.pwa-install-sheet.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.pwa-install-sheet strong {
    display: block;
    margin-bottom: 4px;
    font-size: 14px;
    color: #0f172a;
}

.pwa-install-sheet span {
    display: block;
    color: #64748b;
    font-size: 13px;
    line-height: 1.7;
}

.pwa-install-sheet button {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 28px;
    height: 28px;
    border: 0;
    border-radius: 999px;
    background: #f1f5f9;
    color: #475569;
    cursor: pointer;
}

@media (max-width: 480px) {
    .pwa-install-button {
        width: 46px;
        padding: 0;
    }

    .pwa-install-button span {
        display: none;
    }
}