/* Article Page Styles - Optimized Layout Structure */

/* Main Container */
.main-content {
    padding: 0;
    background: var(--bg-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Full-width Article Banner */
.article-banner {
    width: 100vw;
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 4rem 0;
    color: white;
    text-align: center;
    overflow: hidden;
    margin-bottom: 3rem;
}

.article-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="50" cy="10" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="10" cy="60" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="90" cy="40" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.article-banner .banner-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
}

.article-banner .article-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.article-banner .article-meta>span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.75rem 1.5rem;
    border-radius: 30px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.article-banner h1 {
    font-size: 3rem;
    font-weight: 800;
    margin: 2rem 0 1.5rem 0;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    line-height: 1.2;
}

.article-banner .article-subtitle {
    font-size: 1.3rem;
    margin: 0;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Article Layout Grid */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 3rem;
    align-items: start;
}

/* Main Content Area - Enhanced Structure */
.article-main {
    background: var(--bg-white);
    border-radius: 25px;
    padding: 0;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.9);
    overflow: hidden;
}

.article-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 25px 25px 0 0;
}

/* Article Header Inside Main */
.article-header {
    padding: 3rem 3rem 2rem 3rem;
    border-bottom: 2px solid var(--border-light);
    background: linear-gradient(135deg, var(--bg-white) 0%, rgba(76, 175, 80, 0.02) 100%);
}

.article-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin: 0 0 1rem 0;
    line-height: 1.3;
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-summary {
    font-size: 1.2rem;
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
    font-style: italic;
}

/* Article Body */
.article-body {
    padding: 3rem;
}

/* Sticky Sidebar - Right Side Only */
.article-sidebar {
    position: sticky;
    top: 120px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    height: fit-content;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
}

/* Recommended Guides */
.recommended-guides {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.recommended-guides::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.recommended-guides h3 {
    color: var(--text-dark);
    margin-bottom: 2rem;
    font-size: 1.4rem;
    text-align: center;
    position: relative;
    font-weight: 700;
}

.recommended-guides h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.guide-item {
    display: block;
    text-decoration: none;
    color: var(--text-dark);
    padding: 1.5rem;
    border-radius: 15px;
    margin-bottom: 1rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-light);
    background: linear-gradient(135deg, var(--bg-light) 0%, rgba(76, 175, 80, 0.02) 100%);
    position: relative;
    overflow: hidden;
}

.guide-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.1), transparent);
    transition: left 0.6s ease;
}

.guide-item:hover::before {
    left: 100%;
}

.guide-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
    border-color: var(--primary-color);
}

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

.guide-item h4 {
    font-size: 1.1rem;
    margin: 0 0 0.75rem 0;
    line-height: 1.4;
    color: var(--text-dark);
    font-weight: 600;
    position: relative;
    z-index: 2;
}

.guide-item p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0 0 1rem 0;
    line-height: 1.5;
    position: relative;
    z-index: 2;
}

.guide-item .guide-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-light);
    position: relative;
    z-index: 2;
}

.guide-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}


/* Enhanced Navigation Section - Simplified */
.article-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 3rem 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1rem;
}

.nav-card {
    background: var(--bg-white);
    border-radius: 20px;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-dark);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.9);
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.nav-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.nav-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.05), transparent);
    transition: left 0.6s ease;
}

.nav-card:hover::after {
    left: 100%;
}

.nav-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.nav-card.prev {
    text-align: left;
}

.nav-card.next {
    text-align: right;
}

.nav-label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    z-index: 2;
}

.nav-label i {
    font-size: 1rem;
    color: var(--primary-color);
}

.nav-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.4;
    position: relative;
    z-index: 2;
    margin: 0;
}

/* Navigation Direction Styles */
.nav-card.prev .nav-label {
    justify-content: flex-start;
}

.nav-card.next .nav-label {
    justify-content: flex-end;
    flex-direction: row-reverse;
}

/* Enhanced Article Content Styles */
.article-content {
    line-height: 1.8;
    font-size: 1.1rem;
    color: var(--text-dark);
    position: relative;
}

/* Educational Content Section Styles */
.educational-content {
    background: linear-gradient(135deg, var(--bg-white) 0%, rgba(76, 175, 80, 0.02) 100%);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.educational-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px 20px 0 0;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.education-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(76, 175, 80, 0.05), transparent);
    transition: left 0.6s ease;
}

.education-card:hover::before {
    left: 100%;
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.education-card .card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 2;
}

.education-card .card-icon i {
    font-size: 1.5rem;
    color: white;
}

.education-card h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
    position: relative;
    z-index: 2;
}

.education-card p {
    color: var(--text-dark);
    line-height: 1.7;
    margin: 0;
    font-size: 0.95rem;
    position: relative;
    z-index: 2;
}

.usage-tips {
    background: rgba(76, 175, 80, 0.05);
    border-radius: 16px;
    padding: 2.5rem;
    border: 1px solid rgba(76, 175, 80, 0.1);
}

.usage-tips h3 {
    color: var(--text-dark);
    margin-bottom: 2rem;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
}

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

.tip-item {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
}

.tip-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.tip-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tip-item h4 {
    color: var(--text-dark);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.tip-item p {
    color: var(--text-light);
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Enhanced Section Styling */
.article-content .content-section {
    background: linear-gradient(135deg, var(--bg-white) 0%, rgba(76, 175, 80, 0.02) 100%);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.article-content .content-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px 20px 0 0;
}

/* Enhanced Headings */
.article-content h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin: 0 0 2rem 0;
    position: relative;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(76, 175, 80, 0.1);
}

.article-content h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 1px;
}

.article-content h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 2.5rem 0 1.5rem 0;
    position: relative;
    padding-left: 1rem;
}

.article-content h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.article-content h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 2rem 0 1rem 0;
    position: relative;
}

/* Enhanced Paragraphs */
.article-content p {
    margin-bottom: 1.8rem;
    text-align: justify;
    line-height: 1.8;
    color: var(--text-dark);
    font-weight: 400;
}

.article-content p:last-child {
    margin-bottom: 0;
}

/* Formula Explanation Styling */
.article-content .formula-explanation {
    background: linear-gradient(135deg, #f8fafb 0%, #e9ecef 100%);
    border-radius: 16px;
    padding: 2.5rem;
    margin: 2.5rem 0;
    border-left: 5px solid var(--primary-color);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
    position: relative;
}

.article-content .formula-explanation::before {
    content: '📐';
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 2rem;
    opacity: 0.3;
}

.article-content .formula-explanation h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.article-content .formula-explanation h4 {
    color: var(--text-dark);
    margin-top: 2rem;
    font-size: 1.2rem;
}

/* Formula Box Styling */
.article-content .formula-box {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem;
    border-radius: 12px;
    margin: 1.5rem 0;
    text-align: center;
    box-shadow: 0 8px 24px rgba(76, 175, 80, 0.3);
    position: relative;
    overflow: hidden;
}

.article-content .formula-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.article-content .formula-box:hover::before {
    left: 100%;
}

.article-content .formula-box p {
    margin: 0.75rem 0;
    font-size: 1.2rem;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    text-align: center;
}

.article-content .formula-box strong {
    font-weight: 700;
    font-size: 1.1em;
}

/* Highlight Box Styling */
.article-content .highlight-box {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.08) 0%, rgba(76, 175, 80, 0.04) 100%);
    border: 2px solid rgba(76, 175, 80, 0.2);
    border-radius: 16px;
    padding: 2.5rem;
    margin: 2.5rem 0;
    position: relative;
    box-shadow: 0 6px 24px rgba(76, 175, 80, 0.1);
}

.article-content .highlight-box::before {
    content: '💡';
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 2rem;
    opacity: 0.6;
}

.article-content .highlight-box h4 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
}

.article-content .highlight-box p {
    color: var(--text-dark);
    font-weight: 500;
    margin-bottom: 0;
    font-size: 1.05rem;
}

/* Data Table Styling */
.article-content .data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.article-content .data-table thead {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.article-content .data-table th {
    padding: 1.5rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-content .data-table td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-size: 0.95rem;
    color: var(--text-dark);
}

.article-content .data-table tbody tr:hover {
    background: rgba(76, 175, 80, 0.05);
}

.article-content .data-table .healthy-range {
    background: rgba(76, 175, 80, 0.08);
}

.article-content .data-table .healthy-range:hover {
    background: rgba(76, 175, 80, 0.12);
}

/* Lists Styling */
.article-content ul,
.article-content ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.article-content li {
    margin-bottom: 0.75rem;
    line-height: 1.7;
    color: var(--text-dark);
}

.article-content ul li::marker {
    color: var(--primary-color);
}

.article-content ol li::marker {
    color: var(--primary-color);
    font-weight: 600;
}

/* Blockquote Styling */
.article-content blockquote {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.05) 0%, rgba(76, 175, 80, 0.02) 100%);
    border-left: 4px solid var(--primary-color);
    padding: 2rem;
    margin: 2rem 0;
    border-radius: 0 12px 12px 0;
    font-style: italic;
    position: relative;
}

.article-content blockquote::before {
    content: '"';
    position: absolute;
    top: 1rem;
    left: 1rem;
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.3;
    font-family: serif;
}

.article-content blockquote p {
    margin-bottom: 0;
    padding-left: 2rem;
    font-size: 1.1rem;
    color: var(--text-dark);
}

.lead {
    font-size: 1.3rem !important;
    font-weight: 400;
    color: var(--text-dark);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    padding: 2.5rem;
    background: linear-gradient(135deg, var(--bg-light) 0%, rgba(76, 175, 80, 0.05) 100%);
    border-radius: 20px;
    border-left: 5px solid var(--primary-color);
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.lead::before {
    content: '"';
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.2;
    font-family: serif;
    line-height: 1;
}

/* Table of Contents */
.table-of-contents {
    background: linear-gradient(135deg, var(--bg-light) 0%, rgba(76, 175, 80, 0.03) 100%);
    padding: 2.5rem;
    border-radius: 20px;
    margin: 2.5rem 0;
    border-left: 5px solid var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.table-of-contents h3 {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-size: 1.3rem;
    font-weight: 700;
}

.toc-list {
    list-style: none;
    padding: 0;
}

.toc-list li {
    margin-bottom: 0.75rem;
}

.toc-list a {
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.3s ease;
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-weight: 500;
}

.toc-list a:hover {
    color: var(--primary-color);
    background: rgba(76, 175, 80, 0.1);
    transform: translateX(0.5rem);
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 0;
    padding: 2rem 0 10px;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: 60px;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
    font-weight: 500;
}

.breadcrumb a:hover {
    color: var(--secondary-color);
}

.breadcrumb .separator {
    margin: 0 1rem;
    color: var(--text-light);
}

.breadcrumb .current {
    color: var(--text-dark);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .article-body {
        padding: 0rem !important;
    }

    .article-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .article-header {
        padding: 2rem;
    }

    .article-sidebar {
        position: static;
        /* order: -1; */
        display: block;
        max-height: none;
        overflow-y: visible;
    }

    .article-banner h1 {
        font-size: 2.5rem;
    }

    .article-main {
        padding: 5px !important;
    }
    .btn {
        padding: 10px 3px;
        font-size: 14px;
    }
    /* Article Content Responsive */
    .article-content .content-section {
        padding: 5px !important;
        margin-bottom: 2.5rem;
        border-radius: 16px;
    }

    .article-content h2 {
        font-size: 2rem;
    }

    .article-content h3 {
        font-size: 1.4rem;
    }

    .article-content .formula-explanation,
    .article-content .highlight-box {
        padding: 2rem;
        border-radius: 12px;
    }

    .article-content .formula-box {
        padding: 1.5rem;
    }

    .article-content .data-table th,
    .article-content .data-table td {
        padding: 1rem 0.75rem;
        font-size: 0.9rem;
    }

    .cta-buttons {
        display: flex;
        justify-content: space-around;

    }
}

@media (max-width: 768px) {
    .article-banner {
        padding: 3rem 0;
    }

    .article-banner .banner-content {
        padding: 0 1rem;
    }

    .article-banner h1 {
        font-size: 2rem;
        margin: 1.5rem 0 1rem 0;
    }

    .article-banner .article-subtitle {
        font-size: 1.1rem;
    }

    .article-banner .article-meta {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .article-main {
        padding: 1.5rem;
        border-radius: 15px;
    }

    .recommended-guides {
        padding: 1.5rem;
        border-radius: 15px;
    }

    .article-navigation {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin: 2rem 0;
        padding: 0 0.5rem;
    }

    .nav-card {
        padding: 2rem;
        border-radius: 15px;
    }

    .lead {
        padding: 2rem;
        font-size: 1.2rem !important;
        border-radius: 15px;
    }

    .table-of-contents {
        padding: 2rem;
        border-radius: 15px;
    }

    /* Mobile Article Content */
    .article-content .content-section {
        padding: 2rem;
        margin-bottom: 2rem;
        border-radius: 12px;
    }

    .article-content h2 {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }

    .article-content h3 {
        font-size: 1.3rem;
        margin: 2rem 0 1rem 0;
    }

    .article-content h4 {
        font-size: 1.2rem;
    }

    .article-content .formula-explanation,
    .article-content .highlight-box {
        padding: 1.5rem;
        margin: 2rem 0;
    }

    .article-content .formula-box {
        padding: 1.5rem;
        margin: 1.5rem 0;
    }

    .article-content .formula-box p {
        font-size: 1.1rem;
    }

    .article-content .data-table {
        font-size: 0.85rem;
    }

    .article-content .data-table th,
    .article-content .data-table td {
        padding: 0.75rem 0.5rem;
    }

    .article-content blockquote {
        padding: 1.5rem;
        margin: 1.5rem 0;
    }

    .article-content blockquote::before {
        font-size: 2.5rem;
        top: 0.75rem;
        left: 0.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }

    .article-banner {
        padding: 2rem 0;
    }

    .article-banner .banner-content {
        padding: 0 0.5rem;
    }

    .article-banner h1 {
        font-size: 1.75rem;
    }

    .article-banner .article-subtitle {
        font-size: 1rem;
    }

    .article-layout {
        gap: 1rem;
    }

    .article-main {
        padding: 1rem;
    }

    .recommended-guides {
        padding: 1rem;
    }

    .nav-card {
        border-radius: 15px;
        min-height: 80px;
        padding: 1.5rem;
    }

    .nav-title {
        font-size: 1.1rem;
    }

    .article-navigation {
        margin: 1.5rem 0;
        padding: 0 0.5rem;
    }

    .article-content {
        font-size: 1rem;
    }

    .lead {
        padding: 1.5rem;
        font-size: 1.1rem !important;
    }

    .table-of-contents {
        padding: 1.5rem;
    }

    /* Small Mobile Article Content */
    .article-content .content-section {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
        border-radius: 10px;
    }

    .article-content h2 {
        font-size: 1.6rem;
        padding-left: 0;
        margin-bottom: 1.25rem;
    }

    .article-content h2::before {
        display: none;
    }

    .article-content h2::after {
        width: 60px;
    }

    .article-content h3 {
        font-size: 1.2rem;
        padding-left: 0.75rem;
        margin: 1.5rem 0 1rem 0;
    }

    .article-content h3::before {
        width: 3px;
        height: 20px;
    }

    .article-content h4 {
        font-size: 1.1rem;
        margin: 1.5rem 0 0.75rem 0;
    }

    .article-content .formula-explanation,
    .article-content .highlight-box {
        padding: 1.25rem;
        margin: 1.5rem 0;
        border-radius: 10px;
    }

    .article-content .formula-explanation::before,
    .article-content .highlight-box::before {
        font-size: 1.5rem;
        top: 1rem;
        right: 1rem;
    }

    .article-content .formula-box {
        padding: 1.25rem;
        margin: 1.25rem 0;
        border-radius: 8px;
    }

    .article-content .formula-box p {
        font-size: 1rem;
        margin: 0.5rem 0;
    }

    .article-content .data-table {
        font-size: 0.8rem;
        border-radius: 8px;
    }

    .article-content .data-table th {
        padding: 0.75rem 0.5rem;
        font-size: 0.75rem;
    }

    .article-content .data-table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.7rem;
    }

    .article-content blockquote {
        padding: 1.25rem;
        margin: 1.25rem 0;
        border-radius: 8px;
    }

    .article-content blockquote::before {
        font-size: 2rem;
        top: 0.5rem;
        left: 0.5rem;
    }

    .article-content blockquote p {
        padding-left: 1.5rem;
        font-size: 1rem;
    }

    .article-content ul,
    .article-content ol {
        padding-left: 1.5rem;
    }

    .article-content li {
        margin-bottom: 0.5rem;
        font-size: 0.95rem;
    }
}

/* Print Styles */
@media print {

    .article-sidebar,
    .article-navigation,
    .breadcrumb {
        display: none;
    }

    .article-banner {
        background: #f8f9fa !important;
        color: #000 !important;
        padding: 2rem 0;
    }

    .article-layout {
        grid-template-columns: 1fr;
    }

    .article-main {
        box-shadow: none;
        border: 1px solid #ddd;
        padding: 2rem;
    }

    .article-content {
        font-size: 12pt;
        line-height: 1.6;
    }

    .article-banner h1 {
        color: #000 !important;
        text-shadow: none !important;
    }
}