Почему z-index не работает?

Hi! In my new video, I'm talking about stacking context and how it affects working with layers. Additional Channel content and support: ❤️ https://boosty.to/maxgraph ❤️ https://www.donationalerts.com/r/maxd... Useful links: 🤌 Layout templates: https://verstaem.online/projects/ 🤌 Layout problems with solutions: https://verstaem.online/tasks/ 🤌 HTML email layout course: https://verstaem.online/courses/html-... 🤌 Telegram channel with useful tips: https://t.me/maxgraph 🤌 Chat for layout designers: https://t.me/maxgraph_chat 🤙 VK Video: https://vk.com/video/@maxgraph 👋 My name is Maxim. I'm a layout designer and have been working in web development for 7 years. Subscribe: https://www.youtube.com/@maxgraph?sub... #layout #html #css