/* List Controls Styling */
.list-controls-wrapper {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.list-controls {
    display: flex;
    gap: 12px;
    align-items: center;
}

#unit-select {
    flex: 1;
    padding: 12px 16px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    font-size: 1rem;
    appearance: none;
    cursor: pointer;
    outline: none;
    transition: all 0.3s ease;
}

#unit-select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

.video-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: not-allowed;
    transition: all 0.3s ease;
    opacity: 0.5;
}

.video-btn.active {
    background: #ff0000; /* YouTube Red */
    color: white;
    border-color: #ff0000;
    cursor: pointer;
    opacity: 1;
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.3);
}

.video-btn.active:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(255, 0, 0, 0.4);
}

.unit-title {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
}

/* Mobile Optimization */
@media (max-width: 480px) {
    .list-controls-wrapper {
        padding: 12px;
        margin-bottom: 16px;
    }
    
    .video-btn span {
        display: none;
    }
    
    .video-btn {
        padding: 12px;
    }
}