/* Делаем контейнер флексом
.header-nav .right-nav {
    display: flex;
    align-items: center;
} */


.phone-button {
    display: inline-flex;
    align-items: center;
    margin-left: 20px;
    margin-right: 20px;
    z-index: 999;
}

.phone-button a {
    background: #28a745;
    color: #fff;
    padding: 12px;
    border-radius: 50%;
    font-size: 18px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.phone-button a:hover {
    background: #218838;
}


@media (max-width: 768px) {
    .phone-button {
        margin-left: 15px;
    }

    .phone-button a {
        padding: 10px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .phone-button {
        margin-left: 10px;
        position: absolute;
        right: 0;
        bottom: 10px;
    }

    .phone-button a {
        padding: 8px;
        font-size: 14px;
    }
}