/* Loader Styles */
.loader {
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-left: -20px;
    margin-top: -20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Hide content initially */
.hidden {
    display: none;
}