/* Top Banner (promotional banner at top of page) */
.top-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(45deg, #FF6B6B, #4ECDC4, #45B7D1, #96CEB4);
    background-size: 400% 400%;
    animation: gradientShift 3s ease infinite;
    color: white;
    text-align: center;
    padding: 10px;
    font-weight: bold;
    z-index: 1001;
    transform: translateY(-100%);
    transition: transform 0.5s ease;
    opacity: 0;
}

.top-banner.show {
    transform: translateY(0);
    opacity: 1;
}

.top-banner .close-banner {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.top-banner .close-banner:hover {
    opacity: 1;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .top-banner {
        font-size: 14px;
        padding: 8px;
    }
}