* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.7;
    color: #1a1a2e;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 140, 0, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

header .container {
    position: relative;
    z-index: 1;
}

header h1 {
    font-size: 3em;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    color: #ffffff;
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.9;
    font-weight: 300;
    letter-spacing: 0.5px;
    color: #b0e0e6;
}

main {
    padding-bottom: 60px;
}

.intro {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    margin-bottom: 50px;
    border-top: 4px solid #00bcd4;
}

.intro h2 {
    color: #00838f;
    margin-bottom: 20px;
    font-size: 1.8em;
    font-weight: 600;
}

.intro p {
    margin-bottom: 15px;
    color: #555;
}

.articles-grid {
    display: grid;
    gap: 30px;
}

.article-card {
    background: white;
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
    position: relative;
    overflow: hidden;
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #00bcd4 0%, #4dd0e1 100%);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.article-card:hover::before {
    transform: scaleY(1);
}

.article-date {
    color: #4dd0e1;
    font-size: 0.9em;
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-card-link {
    text-decoration: none;
    display: block;
    color: inherit;
}

.article-card h3 {
    margin-bottom: 15px;
    font-size: 1.4em;
    line-height: 1.4;
    color: #1a1a2e;
    font-weight: 600;
    transition: color 0.3s;
}

.article-card-link:hover .article-card h3 {
    color: #00bcd4;
}

.article-card p {
    color: #666;
    line-height: 1.7;
}

/* Article page styles */
.article-header {
    background: white;
    padding: 50px 40px 30px 40px;
    border-bottom: 3px solid #00bcd4;
    margin-bottom: 40px;
    border-radius: 12px 12px 0 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.article-header h1 {
    font-size: 2.2em;
    line-height: 1.3;
    margin-bottom: 15px;
    color: #2c3e50;
}

.article-meta {
    color: #4dd0e1;
    font-size: 0.95em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-content {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    margin-bottom: 40px;
    border-top: 3px solid #00bcd4;
}

.article-content h2 {
    color: #00838f;
    margin-top: 40px;
    margin-bottom: 20px;
    font-size: 1.6em;
    padding-bottom: 10px;
    border-bottom: 3px solid #00bcd4;
    font-weight: 600;
}

.article-content h2:first-of-type {
    margin-top: 0;
}

.article-content h3 {
    color: #555;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.3em;
}

.article-content p {
    margin-bottom: 18px;
    color: #444;
    line-height: 1.8;
}

.article-content ul, .article-content ol {
    margin: 20px 0 20px 30px;
    color: #444;
}

.article-content li {
    margin-bottom: 10px;
    line-height: 1.7;
}

.article-content strong {
    color: #2c3e50;
    font-weight: 600;
}

.article-content blockquote {
    border-left: 4px solid #00bcd4;
    padding-left: 20px;
    margin: 25px 0;
    color: #555;
    font-style: italic;
    background: #f0f9fa;
    padding: 20px;
    border-radius: 4px;
}

.global-impact {
    background: linear-gradient(135deg, #e0f7fa 0%, #f0f9fa 100%);
    padding: 30px;
    border-radius: 12px;
    margin-top: 50px;
    border-left: 5px solid #00bcd4;
    box-shadow: 0 2px 10px rgba(0,188,212,0.1);
}

.global-impact h2 {
    color: #00838f;
    margin-top: 0;
    margin-bottom: 15px;
    border: none;
    padding: 0;
    font-weight: 600;
}

.back-link {
    display: inline-block;
    margin-bottom: 30px;
    color: #00bcd4;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    padding: 8px 16px;
    border-radius: 6px;
    background: rgba(0,188,212,0.1);
}

.back-link:hover {
    color: #00838f;
    background: rgba(0,188,212,0.2);
    transform: translateX(-3px);
}

footer {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    text-align: center;
    padding: 40px 0;
    margin-top: 60px;
    border-top: 3px solid #00bcd4;
}

footer p {
    opacity: 0.8;
}

.article-content ul a {
    color: #00bcd4;
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
}

.article-content ul a:hover {
    color: #00838f;
    text-decoration: underline;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    .article-header {
        padding: 40px 20px 25px 20px;
    }
    
    .article-header h1 {
        font-size: 1.8em;
    }
    
    .article-content {
        padding: 25px;
    }
    
    .intro {
        padding: 25px;
    }
}