/* ===== ARTICLES SPECIFIC STYLES ===== */

/* ===== ARTICLE HERO ===== */
.article-hero {
    padding-top: 140px !important;
    min-height: 60vh !important;
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

.article-hero::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="article-pattern" width="30" height="30" patternUnits="userSpaceOnUse"><circle cx="15" cy="15" r="1" fill="%23fff" opacity="0.1"/><circle cx="5" cy="25" r="0.5" fill="%23fff" opacity="0.08"/></pattern></defs><rect width="100" height="100" fill="url(%23article-pattern)"/></svg>');
    pointer-events: none;
}

.article-hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.breadcrumb {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

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

.breadcrumb span {
    color: white;
    font-weight: 600;
}

.article-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.article-subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
    line-height: 1.4;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.author-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.author-avatar {
    font-size: var(--font-size-2xl);
}

.author-details {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.author-name {
    font-weight: 600;
    color: white;
}

.publish-date {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

.article-stats {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-xs);
}

.read-time {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

.article-category {
    background: var(--secondary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    .article-hero {
        padding-top: 120px !important;
        min-height: 50vh !important;
    }
    
    .article-title {
        font-size: var(--font-size-2xl);
    }
    
    .article-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .article-meta {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .author-details,
    .article-stats {
        align-items: center;
    }
}

/* ===== ARTICLE CONTENT ===== */
.article-content {
    background: var(--background-color);
    color: var(--text-primary);
    padding: var(--spacing-xxl) 0;
    line-height: 1.8;
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: var(--spacing-xxl);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 40px var(--shadow-light);
    border: 1px solid var(--border-color);
}

/* ===== TABLE OF CONTENTS ===== */
.table-of-contents {
    background: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
    position: sticky;
    top: calc(var(--header-height) + 20px);
    z-index: 10;
}

.table-of-contents h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.table-of-contents ul {
    list-style: none;
}

.table-of-contents li {
    margin-bottom: var(--spacing-xs);
}

.table-of-contents a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition);
    display: block;
    padding: var(--spacing-xs) 0;
    border-left: 3px solid transparent;
    padding-left: var(--spacing-sm);
}

.table-of-contents a:hover {
    color: var(--secondary-color);
    border-left-color: var(--secondary-color);
    padding-left: var(--spacing-md);
}

/* ===== CONTENT SECTIONS ===== */
.content-section {
    margin-bottom: var(--spacing-xxl);
}

.content-section h2 {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--secondary-color);
    position: relative;
}

.content-section h2::before {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent-color);
}

.content-section h3 {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin: var(--spacing-lg) 0 var(--spacing-md);
    font-weight: 600;
}

.content-section h4 {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    margin: var(--spacing-md) 0 var(--spacing-sm);
    font-weight: 600;
}

.content-section p {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    line-height: 1.8;
}

.content-section ul,
.content-section ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.content-section li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    line-height: 1.7;
}

.content-section ul li {
    list-style: disc;
}

.content-section ol li {
    list-style: decimal;
}

/* ===== HIGHLIGHT BOXES ===== */
.highlight-box {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
    border-left: 5px solid;
    position: relative;
    overflow: hidden;
}

.highlight-box::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    opacity: 0.1;
    background-size: contain;
    background-repeat: no-repeat;
}

.highlight-box.info {
    background: rgba(52, 152, 219, 0.1);
    border-left-color: #3498db;
    color: var(--text-primary);
}

.highlight-box.warning {
    background: rgba(230, 126, 34, 0.1);
    border-left-color: #e67e22;
    color: var(--text-primary);
}

.highlight-box.success {
    background: rgba(39, 174, 96, 0.1);
    border-left-color: #27ae60;
    color: var(--text-primary);
}

.highlight-box h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.highlight-box p,
.highlight-box ul {
    margin-bottom: var(--spacing-sm);
}

.highlight-box:last-child {
    margin-bottom: 0;
}

/* ===== SPECIAL BOXES ===== */
.tip-box {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
    border: 2px solid var(--accent-color);
    position: relative;
}

.tip-box::before {
    content: '💡';
    position: absolute;
    top: -15px;
    left: var(--spacing-md);
    background: var(--accent-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
}

.calculation-box {
    background: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
    border: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
}

.calculation-box h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-family);
}

.calculation-box p {
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.mistake-box {
    background: rgba(231, 76, 60, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
    border-left: 5px solid #e74c3c;
}

.mistake-box h4 {
    color: #e74c3c;
    margin-bottom: var(--spacing-sm);
}

.help-resources {
    background: rgba(39, 174, 96, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
    border: 2px solid #27ae60;
}

.help-resources h4 {
    color: #27ae60;
    margin-bottom: var(--spacing-md);
}

.help-resources a {
    color: #27ae60;
    font-weight: 600;
    text-decoration: underline;
}

.help-resources a:hover {
    color: #2ecc71;
}

.key-takeaways {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
}

.key-takeaways h4 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.key-takeaways ul li {
    color: rgba(255, 255, 255, 0.9);
    list-style: none;
    position: relative;
    padding-left: var(--spacing-md);
}

.key-takeaways ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* ===== COMPARISON TABLE ===== */
.comparison-table {
    margin: var(--spacing-lg) 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 5px 20px var(--shadow-light);
}

.comparison-table h4 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.comparison-table table {
    width: 100%;
    min-width: 600px;
    border-collapse: collapse;
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.comparison-table th {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.comparison-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    font-size: var(--font-size-sm);
}

.comparison-table tr:hover {
    background: var(--surface-color);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

/* ===== PAYMENT METHODS ===== */
.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.method-card {
    background: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.method-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--shadow-light);
}

.method-card h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.method-card p {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.method-card strong {
    color: var(--primary-color);
}

/* ===== RELATED ARTICLES ===== */
.related-articles {
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--border-color);
}

.related-articles h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.related-card {
    background: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    text-align: center;
}

.related-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow-light);
    color: inherit;
}

.related-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.related-card h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.related-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .content-wrapper {
        padding: var(--spacing-lg);
        margin: 0 var(--spacing-sm);
    }
    
    .table-of-contents {
        position: static;
        margin-bottom: var(--spacing-lg);
    }
    
    .comparison-table table {
        min-width: 500px;
        font-size: var(--font-size-xs);
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-sm);
    }
    
    .payment-methods {
        grid-template-columns: 1fr;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .content-wrapper {
        padding: var(--spacing-md);
    }
    
    .content-section h2 {
        font-size: var(--font-size-xl);
    }
    
    .content-section h3 {
        font-size: var(--font-size-lg);
    }
    
    .highlight-box,
    .tip-box,
    .calculation-box,
    .mistake-box,
    .help-resources,
    .key-takeaways {
        padding: var(--spacing-md);
    }
    
    .comparison-table table {
        min-width: 400px;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .article-hero {
        background: white !important;
        color: black !important;
        padding: var(--spacing-lg) 0 !important;
        min-height: auto !important;
    }
    
    .article-hero::before {
        display: none;
    }
    
    .article-title,
    .article-subtitle {
        color: black !important;
    }
    
    .table-of-contents {
        background: #f5f5f5 !important;
        position: static !important;
    }
    
    .highlight-box,
    .tip-box,
    .calculation-box,
    .mistake-box,
    .help-resources,
    .key-takeaways {
        background: #f9f9f9 !important;
        color: black !important;
        border: 1px solid #ccc !important;
    }
    
    .related-articles {
        display: none;
    }
    
    .content-section {
        break-inside: avoid;
    }
}

/* ===== ACCESSIBILITY ===== */
.table-of-contents a:focus,
.related-card:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-section {
    animation: fadeInUp 0.6s ease forwards;
}

.content-section:nth-child(2) { animation-delay: 0.1s; }
.content-section:nth-child(3) { animation-delay: 0.2s; }
.content-section:nth-child(4) { animation-delay: 0.3s; }
.content-section:nth-child(5) { animation-delay: 0.4s; }

/* ===== SCROLL PROGRESS ===== */
.reading-progress {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-accent);
    z-index: 1000;
    transition: width 0.1s ease;
}