A professional social media post design for "Basic Claude Mastery" free webinar. Clean modern layout, warm orange (#C97345) and cream (#F7F3EE) color scheme. Text in Indonesian: "BASIC CLAUDE MASTERY" as main headline, subtitle "Webinar Gratis · Setiap Kamis 20:00 WIB". Include a stylized AI/Claude icon and Zoom icon. Bottom text: "oleh Kang Nurdin · AI Skill Arsenal Indonesia". Minimalist design, social media style, 4:5 aspect ratio, high quality professional graphic design, bukan foto realistik — graphic design poster style.