/* Standard Deviation Calculator Specific Styles */

/* Type Selection */
.type-selection {
    background-color: var(--white);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    box-shadow: var(--shadow);
    border: 1px solid #ccc;
}

.type-selection h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.radio-group {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.radio-option input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.radio-option label {
    font-weight: 500;
    color: var(--text-color);
    cursor: pointer;
    font-size: 1rem;
}

/* Results Section */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.stat-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8f0f7 100%);
    padding: 1.5rem;
    border-radius: 4px;
    border-left: 4px solid var(--accent-color);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* Step-by-step Section */
.steps-section {
    background-color: var(--white);
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 4px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--accent-color);
}

.steps-section h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.step-item {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8f0f7 100%);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    border: 1px solid #ccc;
}

.step-item:last-child {
    margin-bottom: 0;
}

.step-number {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 0.4rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.step-formula {
    background-color: var(--white);
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
    margin: 1rem 0;
}

.step-explanation {
    color: #555;
    line-height: 1.7;
    margin: 0.5rem 0;
}

.step-result {
    background-color: var(--white);
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 0.5rem;
    border: 2px solid var(--accent-color);
}

/* Educational Section */
.educational-section {
    margin-top: 3rem;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 4px;
    box-shadow: var(--shadow);
}

.educational-section h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.educational-section h3 {
    color: var(--accent-color);
    margin: 1.5rem 0 1rem;
    font-size: 1.2rem;
}

.educational-section h4 {
    color: var(--primary-color);
    margin: 1rem 0 0.5rem;
    font-size: 1.1rem;
}

.educational-section p {
    color: #555;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.educational-section ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.educational-section li {
    color: #555;
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

/* Comparison Section */
.comparison-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8f0f7 100%);
    padding: 2rem;
    border-radius: 4px;
    margin: 2rem 0;
    border: 1px solid #ccc;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.comparison-item {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.comparison-item h4 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.comparison-item p {
    color: #555;
    line-height: 1.6;
}

.comparison-item ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.comparison-item li {
    color: #666;
    margin-bottom: 0.5rem;
}

/* Formula Boxes */
.formula-box {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 4px;
    border: 2px solid var(--accent-color);
    margin: 1.5rem 0;
    text-align: center;
}

.formula-description {
    background: linear-gradient(135deg, #e3f2fd 0%, #f5f5f5 100%);
    padding: 1rem;
    border-radius: 4px;
    border-left: 4px solid var(--accent-color);
    margin: 1rem 0;
}

.variable-list {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 4px;
    margin: 1rem 0;
    border: 1px solid #ddd;
}

.variable-list ul {
    list-style: none;
    padding: 0;
}

.variable-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

.variable-list li:last-child {
    border-bottom: none;
}

/* Example Section */
.example-section {
    background: linear-gradient(135deg, #e8f5e9 0%, #f1f8e9 100%);
    padding: 2rem;
    border-radius: 4px;
    margin: 2rem 0;
}

.example-section h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.example-content {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 4px;
}

.example-steps {
    margin-top: 1rem;
}

.example-steps p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.example-steps strong {
    color: var(--accent-color);
    font-weight: 600;
}

/* FAQs Section */
.faq-section {
    margin-top: 3rem;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 4px;
    box-shadow: var(--shadow);
}

.faq-section h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.faq-item {
    background: linear-gradient(135deg, #f5f7fa 0%, #ffffff 100%);
    padding: 1.5rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.faq-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.faq-item p {
    color: #555;
    line-height: 1.7;
}

/* Expert Section */
.expert-section {
    margin: 3rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, #e8f5e9 0%, #f1f8e9 100%);
    border-radius: 4px;
}

.expert-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.expert-badge svg {
    stroke-width: 3;
}

.expert-card {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 2rem;
    background: white;
    padding: 2rem;
    border-radius: 4px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.expert-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--accent-color);
}

.expert-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.expert-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.expert-title {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.expert-bio {
    color: #555;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.expert-linkedin {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #0077b5;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.expert-linkedin:hover {
    opacity: 0.8;
}

/* KaTeX Formula Styles */
.katex-display {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    padding: 0.5rem 0;
}

.katex {
    font-size: 1.2em !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .type-selection {
        padding: 1rem;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .educational-section {
        padding: 1.5rem;
    }
    
    .expert-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .expert-image {
        margin: 0 auto;
    }
    
    .katex {
        font-size: 0.9em !important;
    }
}

@media (max-width: 480px) {
    .educational-section {
        padding: 1rem;
    }
    
    .faq-section {
        padding: 1rem;
    }
    
    .expert-section {
        padding: 1rem;
    }
    
    .katex {
        font-size: 0.85em !important;
    }
}