/* The original Flutter access screen stays in its own full-height region.
   Public learning content is real HTML below it and remains usable without JS. */
html.app-active, html.app-active body { height: 100%; overflow: hidden; }
html.app-active .public-learning, html.app-active .public-footer { display: none; }
.public-nav { position: sticky; top: 0; z-index: 50; height: 56px; box-sizing: border-box; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 0 max(16px, calc((100vw - 1440px) / 2)); background: #1b1c1a; color: #e1e3e8; font: 14px system-ui, sans-serif; border-bottom: 1px solid #41443d; }
.public-nav .public-brand { display: flex; align-items: center; gap: 10px; font-weight: 750; text-decoration: none; white-space: nowrap; }
.public-nav img { width: 32px; height: 32px; border-radius: 8px; }
.public-nav div { display: flex; align-items: center; gap: 20px; }
.public-nav a { color: inherit; text-underline-offset: 4px; }
#app { position: relative; width: 100%; height: calc(100vh - 56px); height: calc(100dvh - 56px); min-height: 350px; background: #1b1c1a; overflow: hidden; overscroll-behavior: contain; scroll-margin-top: 56px; }
.public-learning { scroll-margin-top: 56px; background: #151614; color: #e1e3e8; font: 17px/1.7 system-ui, sans-serif; padding: 48px max(20px, calc((100vw - 1040px) / 2)); }
.public-learning h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.15; max-width: 25ch; }
.public-learning h2 { font-size: 25px; line-height: 1.3; }
.public-learning a { color: #d4e8c1; text-underline-offset: 4px; }
.public-learning p { max-width: 76ch; }
.public-learning .sample { padding: 20px 24px; background: #242622; border: 1px solid #51544d; border-radius: 14px; margin: 28px 0; }
.public-learning .lesson-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 32px 0; padding: 0; list-style: none; }
.public-learning .lesson-links li { padding: 20px; border: 1px solid #51544d; border-radius: 12px; }
.public-learning .lesson-links a { font-weight: 700; }
.public-learning .lesson-links p { font-size: 15px; color: #bdbfba; margin-bottom: 0; }
.public-footer { padding: 28px 20px; background: #101110; color: #bdbfba; font: 14px/1.8 system-ui, sans-serif; display: flex; justify-content: center; flex-wrap: wrap; gap: 20px; }
.public-footer a { color: inherit; }
.public-nav a:focus-visible, .public-learning a:focus-visible, .public-footer a:focus-visible { outline: 3px solid #becfb2; outline-offset: 4px; }
@media (max-width: 480px) { .public-nav { font-size: 13px; } .public-nav .brand-name { display: none; } .public-nav div { gap: 14px; } .public-learning .lesson-links { grid-template-columns: 1fr; } }