easy-going-rails/app/assets/stylesheets/toastify.css

.toastify {
    padding: 12px 20px;
    color: #ffffff;
    display: inline-block;
    box-shadow: 0 6px 6px 3px rgba(0, 0, 0, 0.3), 0 10px 36px -4px rgba(77, 96, 232, 0.3);
    background: linear-gradient(135deg, #73a5ff, #5477f5);
    position: fixed;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.215, 0.61, 0.355, 1);
    border-radius: 2px;
    cursor: text;
    text-decoration: none;
    max-width: calc(50% - 20px);
    z-index: 50;
}

.toastify-notice {
    background: linear-gradient(135deg, darkgreen, green);
}

.toastify-alert {
    background: linear-gradient(135deg, darkred, red)
}
.toastify.on {
    opacity: 1;
    top: 0;
}

.toastify .toast-close {
    background: transparent;
    color: transparent;
    margin-left: 1em;
    padding: 0 5px;
    border-radius: 25%;
    border: 0;
    cursor: pointer;
    font-family: inherit;
    font-size: 1em;
    opacity: 0;
}

.toastify:hover .toast-close {
    background: white;
    color: black;
    opacity: 0.5;
    transition: all 0.3s cubic-bezier(0.215, 0.61, 0.355, 1);
}

.toastify-right {
    right: 15px;
}

.toastify-left {
    left: 15px;
}

.toastify-top {
    top: -150px;
}

.toastify-bottom {
    bottom: -150px;
}

.toastify-rounded {
    border-radius: 25px;
}

.toastify-avatar {
    width: 1.5em;
    height: 1.5em;
    margin: -7px 5px;
    border-radius: 2px;
}

.toastify-center {
    margin-left: auto;
    margin-right: auto;
    left: 0;
    right: 0;
    max-width: fit-content;
}

@media only screen and (max-width: 360px) {
    .toastify-right, .toastify-left {
        margin-left: auto;
        margin-right: auto;
        left: 0;
        right: 0;
        max-width: fit-content;
    }
}