/* Learning Hub Container */
.learning-container {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Sidebar Styles */
.learning-sidebar {
    flex: 0 0 300px;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    height: fit-content;
    position: sticky;
    top: 2rem;
}

.learning-steps {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.learning-step {
    padding: 0.75rem 1rem;
    margin: 0.5rem 0;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    color: #495057;
}

.learning-step:hover {
    background: #e9ecef;
    color: #212529;
}

.learning-step.active {
    background: #007bff;
    color: white;
    font-weight: 500;
}

/* Content Area Styles */
.learning-content {
    flex: 1;
    min-width: 0;
}

.step-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.step-content.active {
    display: block;
}

/* Typography */
.section-title {
    font-size: 2.5rem;
    color: #212529;
    margin-bottom: 2rem;
    text-align: center;
}

.panel-title {
    font-size: 1.25rem;
    color: #343a40;
    margin-bottom: 1rem;
}

.step-content h2 {
    font-size: 2rem;
    color: #212529;
    margin-bottom: 1.5rem;
}

.step-content h3 {
    font-size: 1.5rem;
    color: #343a40;
    margin: 2rem 0 1rem;
}

.step-content p {
    font-size: 1rem;
    line-height: 1.6;
    color: #495057;
    margin-bottom: 1rem;
}

/* Concept Box Styles */
.concept-box {
    display: flex;
    gap: 1.5rem;
    margin: 2rem 0;
}

.box1, .box2 {
    flex: 1;
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.concept-highlight {
    background: #e9ecef;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    border-left: 4px solid #007bff;
}

/* Formula Styles */
.formula {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1rem 0;
    text-align: center;
    font-family: 'Times New Roman', serif;
    font-size: 1.2rem;
}

/* List Styles */
.step-content ul, .step-content ol {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.step-content li {
    margin-bottom: 0.5rem;
    color: #495057;
    line-height: 1.5;
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .learning-container {
        flex-direction: column;
    }
    
    .learning-sidebar {
        flex: none;
        position: static;
        width: 100%;
    }
    
    .concept-box {
        flex-direction: column;
    }
}

/* Code and Math Styles */
code {
    background: #f8f9fa;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

sub {
    font-size: 0.75em;
    vertical-align: sub;
}

/* Links */
.step-content a {
    color: #007bff;
    text-decoration: none;
    transition: color 0.2s ease;
}

.step-content a:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* Strong Text */
strong {
    color: #212529;
    font-weight: 600;
}