body { font-family: ‘Segoe UI’, Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; margin: 0; padding: 20px; background: #f8f9fa; color: #333; }
.container { max-width: 800px; margin: 0 auto; background: white; padding: 30px; border-radius: 10px; box-shadow: 0 0 20px rgba(0,0,0,0.1); }
h1 { color: #2c3e50; border-bottom: 3px solid #3498db; padding-bottom: 10px; }
h2 { color: #2980b9; margin-top: 30px; }
.highlight { background: #fff3cd; padding: 15px; border-left: 4px solid #ffc107; margin: 20px 0; }
.pro-tip { background: #d4edda; padding: 15px; border-left: 4px solid #28a745; margin: 20px 0; }
a { color: #e74c3c; text-decoration: none; font-weight: bold; }
a:hover { text-decoration: underline; }
.author { display: flex; align-items: center; margin: 20px 0; }
.author-img { width: 60px; height: 60px; border-radius: 50%; background: #3498db; margin-right: 15px; display: flex; align-items: center; justify-content: center; color: white; font-size: 24px; }