.screen-help-button {
    position: fixed;
    right: max(24px, env(safe-area-inset-right));
    bottom: max(24px, env(safe-area-inset-bottom));
    z-index: 2147483500;
    display: inline-flex;
    width: 56px;
    height: 56px;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, .92);
    border-radius: 50%;
    background: #315ca3;
    box-shadow: 0 8px 24px rgba(20, 40, 74, .34);
    color: #fff;
    font-size: 24px;
    line-height: 1;
    text-decoration: none;
    transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease;
}

.screen-help-button:hover {
    background: #244a86;
    box-shadow: 0 10px 28px rgba(20, 40, 74, .42);
    color: #fff;
    text-decoration: none;
    transform: translateY(-2px);
}

.screen-help-button--image {
    overflow: hidden;
    padding: 7px;
}

.screen-help-button__image {
    position: relative;
    z-index: 1;
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: #315ca3;
    object-fit: contain;
    pointer-events: none;
}

.screen-help-button__fallback {
    position: absolute;
    inset: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.screen-help-button:focus-visible {
    outline: 3px solid #ffbf47;
    outline-offset: 3px;
}

@media (max-width: 767.98px) {
    .screen-help-button {
        right: max(16px, env(safe-area-inset-right));
        bottom: max(16px, env(safe-area-inset-bottom));
        width: 50px;
        height: 50px;
        font-size: 21px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .screen-help-button {
        transition: none;
    }
}