/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background-color: #ffffff;
    font-weight: 400;
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: #ffffff;
    border-bottom: 1px solid #e5e5e5;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo a {
    font-size: 24px;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: #4b5563;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav a:hover {
    color: #2563eb;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: #4b5563;
    transition: all 0.3s ease;
}

.mobile-menu {
    display: none;
    background: #ffffff;
    border-bottom: 1px solid #e5e5e5;
    padding: 20px;
}

.mobile-menu a {
    display: block;
    color: #4b5563;
    text-decoration: none;
    font-weight: 500;
    padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
}

.mobile-menu a:last-child {
    border-bottom: none;
}

/* Main Content */
.main {
    padding: 40px 0 80px;
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 32px;
    font-size: 14px;
    color: #6b7280;
}

.breadcrumb a {
    color: #2563eb;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Article */
.article {
    max-width: 720px;
    margin: 0 auto;
}

.article-header {
    margin-bottom: 48px;
    text-align: center;
}

.article-header h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.1;
    color: #111827;
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    color: #6b7280;
    font-size: 15px;
}

.article-content {
    font-size: 18px;
    line-height: 1.8;
}

.intro {
    margin-bottom: 48px;
}

.lead {
    font-size: 22px;
    line-height: 1.7;
    color: #374151;
    font-weight: 400;
}

/* Content Sections */
.content-section {
    margin-bottom: 48px;
}

.content-section h2 {
    font-size: 32px;
    font-weight: 600;
    color: #111827;
    margin-bottom: 24px;
    line-height: 1.3;
}

.content-section h3 {
    font-size: 24px;
    font-weight: 600;
    color: #111827;
    margin-bottom: 16px;
    margin-top: 32px;
    line-height: 1.3;
}

.content-section h4 {
    font-size: 20px;
    font-weight: 600;
    color: #111827;
    margin-bottom: 12px;
    margin-top: 24px;
}

.content-section p {
    margin-bottom: 20px;
    color: #374151;
}

.content-section ul {
    margin-bottom: 20px;
    padding-left: 24px;
}

.content-section li {
    margin-bottom: 8px;
    color: #374151;
}

/* Stats Box */
.stats-box {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 24px;
    margin: 32px 0;
}

.stats-box h4 {
    margin-bottom: 16px;
    color: #1e293b;
}

.stats-box ul {
    margin-bottom: 0;
}

.stats-box li {
    margin-bottom: 12px;
}

.stats-box strong {
    font-weight: 600;
    color: #1e293b;
}

/* Blockquotes */
blockquote {
    border-left: 4px solid #2563eb;
    padding-left: 24px;
    margin: 32px 0;
    font-style: italic;
    font-size: 20px;
    line-height: 1.6;
    color: #4b5563;
}

/* Tables */
.comparison-table {
    margin: 32px 0;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
}

thead {
    background: #f9fafb;
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

th {
    font-weight: 600;
    color: #374151;
}

td {
    color: #4b5563;
}

tbody tr:last-child td {
    border-bottom: none;
}

/* Solution Lists */
.solution-list {
    display: grid;
    gap: 24px;
    margin: 24px 0;
}

.solution-item {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 24px;
}

.solution-item h4 {
    color: #2563eb;
    margin-bottom: 8px;
}

.solution-item p {
    margin-bottom: 0;
    color: #4b5563;
}

/* CTA Box */
.cta-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 12px;
    padding: 32px;
    margin: 48px 0;
    text-align: center;
}

.cta-box h3 {
    color: #1e40af;
    margin-bottom: 12px;
}

.cta-box p {
    color: #1e40af;
    margin-bottom: 24px;
}

/* Newsletter Form */
.newsletter-form {
    display: flex;
    gap: 12px;
    max-width: 400px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 16px;
}

.newsletter-form button {
    background: #2563eb;
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
    white-space: nowrap;
}

.newsletter-form button:hover {
    background: #1d4ed8;
}

/* Footer */
.footer {
    background: #f9fafb;
    border-top: 1px solid #e5e7eb;
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 48px;
    margin-bottom: 32px;
}

.footer-brand h3 {
    font-size: 24px;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 12px;
}

.footer-brand p {
    color: #6b7280;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 48px;
}

.footer-column h4 {
    font-weight: 600;
    color: #374151;
    margin-bottom: 16px;
}

.footer-column a {
    display: block;
    color: #6b7280;
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.2s ease;
}

.footer-column a:hover {
    color: #2563eb;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
    color: #6b7280;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu.active {
        display: block;
    }
    
    .article-header h1 {
        font-size: 36px;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 8px;
    }
    
    .article-content {
        font-size: 16px;
    }
    
    .lead {
        font-size: 18px;
    }
    
    .content-section h2 {
        font-size: 28px;
    }
    
    .content-section h3 {
        font-size: 22px;
    }
    
    blockquote {
        font-size: 18px;
        padding-left: 16px;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-links {
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .article-header h1 {
        font-size: 28px;
    }
    
    .content-section h2 {
        font-size: 24px;
    }
    
    .content-section h3 {
        font-size: 20px;
    }
    
    .stats-box,
    .solution-item,
    .cta-box {
        padding: 20px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 24px;
    }
}