.error_message_backer {
    background: linear-gradient(135deg, #ff3b3b, #c80000);
    color: #fff;
    width: 420px;
    max-width: 90%;
    padding: 12px 18px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.3px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 5000;
    opacity: 0;
    transform: translateY(20px) scale(0.98);
    transition:
        opacity 0.4s ease,
        transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    user-select: none;
    pointer-events: none;
}

.error_message_backer.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.error_message_backer::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 10px;
    padding: 2px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 0, 0, 0.35));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    animation: pulse-border 2s infinite ease-in-out;
}

.success_message_backer {
    background: linear-gradient(135deg, #00d800, #007e00);
    color: #fff;
    width: 420px;
    max-width: 90%;
    padding: 12px 18px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.3px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 5000;
    opacity: 0;
    transform: translateY(20px) scale(0.98);
    transition:
        opacity 0.4s ease,
        transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    user-select: none;
    pointer-events: none;
}

.success_message_backer.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.success_message_backer::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 10px;
    padding: 2px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(0, 255, 0, 0.35));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    animation: pulse-border 2s infinite ease-in-out;
}

@keyframes pulse-border {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.8;
    }
}