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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.nav-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
    gap: 10px;
}

.nav-link {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
    backdrop-filter: blur(10px);
    display: inline-block;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    color: white;
}

.nav-link.active {
    background: white;
    color: #667eea;
    border-color: white;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.article-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.article-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.article-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #ff6b6b, #ffa500);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
}

.article-content {
    padding: 20px;
}

.article-category {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-tech {
    background: #e3f2fd;
    color: #1976d2;
}

.category-design {
    background: #f3e5f5;
    color: #7b1fa2;
}

.category-business {
    background: #e8f5e8;
    color: #388e3c;
}

.category-lifestyle {
    background: #fff3e0;
    color: #f57c00;
}

.article-title {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
    line-height: 1.4;
}

.article-excerpt {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 15px;
    line-height: 1.5;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #999;
    font-size: 0.85rem;
}

.article-date {
    font-weight: 500;
}

.read-more {
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: #764ba2;
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.back-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    color: white;
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .nav-tabs {
        flex-direction: column;
        align-items: center;
    }

    .nav-link {
        width: 200px;
        text-align: center;
    }
}