/* Article Page Styles */

.article-page {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.article-header {
    border-bottom: 2px solid #ddd;
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}

.article-header h1 {
    margin: 0 0 0.5rem 0;
    font-size: 2rem;
    color: #004080;
    line-height: 1.3;
}

.article-meta {
    color: #666;
    font-size: 0.95rem;
    margin: 0;
}

.article-content {
    line-height: 1.8;
    color: #333;
}

.article-section {
    margin-bottom: 2.5rem;
}

.article-section h2 {
    font-size: 1.5rem;
    color: #004080;
    margin-top: 0;
    margin-bottom: 1rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
}

.article-section h3 {
    font-size: 1.2rem;
    color: #333;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.article-section p {
    margin: 0 0 1rem 0;
    text-align: justify;
}

.article-section ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.article-section li {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.article-section strong {
    color: #004080;
}

/* Formula and Calculation Boxes */
.formula-box {
    background-color: #f5f9ff;
    border-left: 4px solid #004080;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 4px;
}

.formula-box p {
    margin: 0.5rem 0;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    text-align: center;
}

.calculation-box {
    background-color: #f0f8f0;
    border-left: 4px solid #10b981;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 4px;
}

.calculation-box h4 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: #047857;
    font-size: 1.1rem;
}

.calculation-box ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
    list-style: none;
}

.calculation-box li {
    margin: 0.5rem 0;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    padding-left: 1.5rem;
    position: relative;
}

.calculation-box li:before {
    content: "→ ";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

.calculation-box hr {
    border: none;
    border-top: 1px solid #ccc;
    margin: 1.5rem 0;
}

/* Data Tables */
.table-responsive {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 4px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.data-table thead {
    background-color: #f5f5f5;
    border-bottom: 2px solid #ddd;
}

.data-table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}

.data-table td {
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
    font-size: 0.95rem;
}

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

.data-table tbody tr:hover {
    background-color: #fafafa;
}

.data-table tbody tr:nth-child(even) {
    background-color: #fafafa;
}

.data-table .positive {
    color: #10b981;
    font-weight: 600;
}

.data-table .negative {
    color: #ef4444;
    font-weight: 600;
}

.data-table .neutral {
    color: #666;
}

/* Article Footer */
.article-footer {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid #ddd;
    color: #666;
    font-size: 0.9rem;
    text-align: center;
}

.article-footer p {
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .article-page {
        padding: 0 0.75rem;
        margin: 1.5rem auto;
    }

    .article-header {
        padding-bottom: 1rem;
        margin-bottom: 1.5rem;
    }

    .article-header h1 {
        font-size: 1.5rem;
    }

    .article-meta {
        font-size: 0.9rem;
    }

    .article-section {
        margin-bottom: 2rem;
    }

    .article-section h2 {
        font-size: 1.25rem;
        margin-bottom: 0.75rem;
        padding-bottom: 0.4rem;
    }

    .article-section h3 {
        font-size: 1.1rem;
        margin-top: 1rem;
        margin-bottom: 0.75rem;
    }

    .article-section p {
        font-size: 0.95rem;
        margin-bottom: 0.75rem;
    }

    .formula-box,
    .calculation-box {
        padding: 1rem;
        margin: 1.25rem 0;
    }

    .calculation-box li {
        padding-left: 1.25rem;
    }

    .table-responsive {
        margin: 1.25rem 0;
    }

    .data-table th,
    .data-table td {
        padding: 0.5rem;
        font-size: 0.85rem;
    }

    .article-footer {
        margin-top: 2rem;
        padding-top: 1rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .article-page {
        padding: 0 0.5rem;
        margin: 1rem auto;
    }

    .article-header h1 {
        font-size: 1.25rem;
    }

    .article-section h2 {
        font-size: 1.1rem;
    }

    .article-content {
        font-size: 0.9rem;
    }

    .formula-box,
    .calculation-box {
        padding: 0.75rem;
        margin: 1rem 0;
    }

    .formula-box p {
        font-size: 0.9rem;
    }

    .calculation-box li {
        font-size: 0.85rem;
        padding-left: 1rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.4rem;
        font-size: 0.75rem;
    }
}