@keyframes captcha-glow {
    0%, 100% { box-shadow: 0 0 5px rgba(59, 130, 246, 0.3); }
    50% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.6); }
}
input[type="image"]:hover {
    animation: captcha-glow 2s ease-in-out infinite;
}
input[type="image"] {
    cursor: crosshair;
}
.captcha-refresh-link {
    display: inline-block;
    background: none;
    border: none;
    color: #2563eb;
    text-decoration: underline;
    font-size: 0.8rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
}
.captcha-refresh-link:hover {
    color: #1d4ed8;
    background-color: rgba(59, 130, 246, 0.1);
}