/* Course Navigation Styles */
.course-navigation {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
}

.nav-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    background: white;
    color: var(--text-primary);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    min-width: 200px;
    justify-content: center;
    font-family: inherit;
    font-size: 1rem;
}

.nav-btn:hover:not(:disabled) {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-secondary);
}

.nav-btn i {
    font-size: 1.1rem;
}

.btn-text {
    font-size: 1rem;
    font-weight: 600;
}

.course-name {
    font-size: 0.9rem;
    opacity: 0.8;
    font-weight: 400;
}

.prev-btn {
    flex-direction: row;
}

.next-btn {
    flex-direction: row-reverse;
}

@media (max-width: 768px) {
    .nav-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-btn {
        width: 100%;
        min-width: auto;
    }
}