.feature-btn {
    margin: 5px;
    min-height: 44px;
    font-size: 0.9rem;
}

.train-btn {
    margin-top: 20px;
    width: 25%;
    min-height: 48px;
    font-size: 1.1rem;
    font-weight: 600;
}

.train-btn:disabled {
    background-color: #6c757d;
    border-color: #6c757d;
    opacity: 0.65;
    cursor: not-allowed;
}

.train-btn.loading {
    position: relative;
}

.train-btn.loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    margin: auto;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: button-loading-spinner 1s ease infinite;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

@keyframes button-loading-spinner {
    from {
        transform: translate(-50%, -50%) rotate(0turn);
    }
    to {
        transform: translate(-50%, -50%) rotate(1turn);
    }
}

/* Mobile responsive adjustments */
@media (max-width: 575.98px) {
    .feature-btn {
        font-size: 0.85rem;
        margin: 3px;
        padding: 0.5rem 0.75rem;
    }
    
    .train-btn {
        width: 100%;
        max-width: 400px;
        font-size: 1rem;
    }
}

/* Tablets */
@media (min-width: 576px) and (max-width: 991.98px) {
    .train-btn {
        width: 50%;
        max-width: 400px;
    }
}

/* Desktop - maintain original 25% width */
@media (min-width: 992px) {
    .train-btn {
        width: 25%;
        min-width: 200px;
    }
}