.tab-btn.active {
    color: #2563eb;
    border-bottom: 2px solid #2563eb;
}

.tab-btn:not(.active) {
    color: #6b7280;
    border-bottom: 2px solid transparent;
}

.tab-btn:hover:not(.active) {
    color: #374151;
}

/* Custom transitions */
.tab-content {
    transition: opacity 0.2s ease-in-out;
}

.hidden {
    display: none;
    opacity: 0;
}

/* Dropzone styling */
.dropzone-active {
    border-color: #2563eb;
    background-color: #eff6ff;
}