Express Your Style

Create-an-HTML-and-CSS-layout-for-a-hero-banner-section-with-the-following-requirements:-The-background-should-feature-a-gradient-animation-that-transitions-smoothly-between-colors.-The-hero-banner-is-divided-into-two-parts:-The-first-part-takes-up-40%-of-the-width-and-contains-a-heading-(<h1>-tag)-with-the-title-'Express-Your-Style'.-Include-an-optional-subheading-(<p>-tag)-with-customizable-text.-The-second-part-takes-up-60%-of-the-width-and-includes-a-video-placeholder-that-plays-on-loop-or-displays-a-GIF.-Ensure-the-layout-is-responsive-for-both-desktop-and-mobile-views.-Add-a-modern,-minimalist-design-with-appropriate-spacing-and-fonts.-Use-semantic-HTML5-and-CSS-only-(no-external-libraries).-Include-comments-for-easy-customization-of-gradient-colors,-heading-text,-and-video-URL.