YouTube channel banner, exactly 2560x1440 pixels, 16:9. All important content — text and key objects — must sit inside the central safe area (a 1546x423 strip in the very center of the image), because YouTube crops the banner on TV, desktop and mobile. The outer areas are decorative background only.
Design: dark tech background with a smooth navy-to-deep-purple gradient (#121A2A to #241A3D), subtle dot grid pattern, soft cinematic side lighting. In the center safe area: the channel name "Development Lectures" in large bold clean sans-serif letters, white with a subtle glow, and below it a short tagline "JavaScript — наглядно и за минуту" in smaller light-gray text. To the left of the text: a cute minimal Pixar-style 3D white robot mascot holding a glowing JavaScript yellow cube with the "JS" logo on it. To the right: a floating stack of dark rounded UI cards with colorful syntax-highlighted code lines (green, blue, red tokens on a GitHub-dark panel), slightly tilted, with soft drop shadows. Scatter a few small glowing teal and amber spheres around the composition as accents, echoing event particles. Color palette: JS yellow (#F7DF1E), teal, amber, white on dark navy-purple. Clean minimal flat-3D style, soft glow, high contrast, professional and friendly, no clutter. The only text in the image is the channel name and the tagline, spelled exactly as given, no other letters, numbers, watermarks or logos anywhere.
