/* Representative night cities for each language, with dark reading-safe overlays. */
.app-shell .book-intro.night-book,.app-shell .language-folder.night-book{position:relative;isolation:isolate;overflow:hidden;background:#090e16!important;border:1px solid #9bacb33a;box-shadow:inset 0 1px #ffffff09,0 15px 35px #0003}
.night-book>.book-night-scene{position:absolute;inset:-2%;z-index:-2;pointer-events:none;animation:book-night-breathe 18s ease-in-out infinite alternate;animation-play-state:paused;transform-origin:68% 50%;will-change:transform}
.book-night-scene img{width:100%;height:100%;object-fit:cover;object-position:65% center;display:block}
.night-book.motion-running>.book-night-scene{animation-play-state:running}
.night-book:after{content:'';position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,#070c14ed 0%,#080e18dc 38%,#080e1848 72%,#080e1810),linear-gradient(0deg,#050a1488,transparent 65%);pointer-events:none}
.app-shell .book-intro.night-book{min-height:290px;padding:35px 42px;border-radius:23px;gap:35px}
.app-shell .book-intro.night-book h1{color:#fff3dc;font-size:38px;letter-spacing:-1px}.app-shell .book-intro.night-book p{color:#d2dce2}.night-book .eyebrow{color:#bba77d}.night-book .book-meta{color:#b9c6cd}.book-intro .book-night-scene img{object-fit:contain;object-position:right center}
@media(min-width:681px){.book-intro>.book-night-scene{left:45%;mask-image:linear-gradient(90deg,transparent,#000 35%)}}
.app-shell .language-folder.night-book{min-height:210px;border-color:#ffffff20}.night-book .folder-copy>strong{color:#f3e9d4}.night-book .folder-copy>small,.night-book .folder-copy>em{color:#c0cbd0}.night-book .folder-arrow{color:#decda7}.language-folder.night-book:after{background:linear-gradient(90deg,#070c14e8,#070c14c7 45%,#070c1452),linear-gradient(0deg,#050a1480,transparent)}
.book-city{display:flex;align-items:center;gap:5px;margin-top:13px;font-size:10px;color:#c9b990;letter-spacing:.2px}.book-city>.ui-icon{width:12px;height:12px}
@keyframes book-night-breathe{from{transform:translate3d(-.4%,0,0) scale(1.015)}to{transform:translate3d(.4%,0,0) scale(1.075)}}
@media(max-width:680px){.app-shell .book-intro.night-book{min-height:245px;padding:25px 21px;gap:20px;border-radius:18px}.app-shell .book-intro.night-book h1{font-size:29px}.night-book .book-meta{font-size:11px}.book-city{font-size:9px}.night-book:after{background:linear-gradient(90deg,#070c14ef,#070c14bd 70%,#070c1460),linear-gradient(0deg,#050a14b0,transparent)}.app-shell .language-folder.night-book{min-height:180px}.book-night-scene img{object-position:65% center}}
@media(prefers-reduced-motion:reduce){.night-book>.book-night-scene{animation:none!important;transform:none;will-change:auto}}