button {
    width: 100%;
    margin-top: 22px;
    border: 0;
    background: #111111;
    color: #ffffff;
    border-radius: 17px;
    padding: 15px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow:
        0 18px 34px rgba(0,0,0,.22),
        inset 0 1px 0 rgba(255,255,255,.12);
    transition: .2s;
}

button:hover {
    background: #000000;
    transform: translateY(-1px);
}

.change-id-btn {
    width: 46px;
    height: 46px;
    min-width: 46px;
    margin-top: 0;
    padding: 0;
    border-radius: 50%;
    background: rgba(255,255,255,.78);
    border: 1px solid rgba(0,0,0,.12);
    color: #111;
    box-shadow: 0 10px 24px rgba(0,0,0,.08);
    font-size: 20px;
    line-height: 1;
}

.change-id-btn:hover {
    background: #111;
    color: #fff;
    filter: none;
}

.change-id-btn.spin {
    animation: spinButton .6s linear;
}

.button-row {
    display: flex;
    gap: 10px;
    margin-top: 22px;
}

.button-row button {
    margin-top: 0;
}

.back-btn {
    display: none;
    background: rgba(255,255,255,.76) !important;
    color: #111 !important;
    border: 1px solid rgba(0,0,0,.1) !important;
    box-shadow: 0 12px 26px rgba(0,0,0,.07) !important;
}