#send-button {
    position: relative;
    overflow: hidden; 
}

.button-content {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.success-message {
    display: none;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    background: linear-gradient(135deg, #00b09b, #96c93d);
    color: white;
    padding: 5px 30px 5px 30px;
    white-space: nowrap;
    border-radius: 7px;
}

.show-message {
    display: block;
    animation-name: sendbutton;
    animation-duration: 3s;
}

@keyframes sendbutton {
    0%   {left: -100%;}
    30%  {left: calc(50% - 70px);}
    60%  {left: calc(50% - 70px); }
    100% {left: 115%;}
}