@media (max-width:900px){
  :root{--toolbar-h:58px;--bottom-h:68px}.topbar{padding:0 10px}.book-brand strong{max-width:42vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.book-brand span{display:none}.topbar-actions{gap:5px}.icon-btn{width:37px;height:37px}.reader-shell{grid-template-columns:34px 1fr 34px}.book-zone{padding:8px}.edge-nav span{width:34px}.bottom-bar{padding:0 10px}.progress-wrap{min-width:150px}.nav-btn span{display:none}.page-inner{padding:38px 30px}.book-page h1{font-size:25px}.example-row{grid-template-columns:1fr}.cover-content{width:68%}.cover-photo{width:72%}.cover-title{font-size:42px}.vocab-page .page-inner{padding:24px 22px 32px}.vocab-main{grid-template-columns:100px 1fr}
}
@media (max-width:620px){
  .topbar-actions .icon-btn:nth-child(5){display:none}.reader-shell{grid-template-columns:1fr}.edge-nav{display:none}.book-zone{padding:6px}.bottom-bar{display:grid;grid-template-columns:1fr;gap:5px;padding:8px 10px;height:78px}.nav-cluster{justify-content:space-between}.progress-wrap{min-width:0}.nav-btn{padding:8px 11px}.page-jump input{width:52px;padding:6px}.book-brand strong{max-width:48vw}.page-inner{padding:32px 24px 34px}.book-page h1{font-size:23px}.lead-bn{font-size:14px}.cover-content{left:6%;top:6%;bottom:6%;width:82%}.cover-photo{right:-16%;width:98%;opacity:.72;mask-image:linear-gradient(90deg,transparent 0%,black 36%,black 100%)}.cover-overlay{background:linear-gradient(90deg,rgba(5,8,16,.98) 0%,rgba(5,8,16,.92) 42%,rgba(5,8,16,.35) 100%)}.cover-title{font-size:34px;max-width:320px}.cover-sub{font-size:12px;max-width:300px}.cover-badges{max-width:310px}.cover-author{align-items:flex-start;flex-direction:column;gap:12px}.vocab-main{grid-template-columns:1fr}.vocab-meaning{grid-column:1}.vocab-main small{display:none}.vocab-row{grid-template-columns:28px 26px 1fr}.vocab-page .page-inner{padding:22px 18px 30px}.author-card{grid-template-columns:90px 1fr}.author-card img{width:90px;height:120px}.panel{right:8px;top:66px;width:calc(100vw - 16px);max-height:calc(100vh - 148px)}
}
@media (max-width:370px){.topbar-actions .icon-btn:nth-child(2){display:none}.book-brand strong{max-width:52vw}.page-inner{padding:28px 20px}.cover-title{font-size:30px}}
@media (orientation:landscape) and (max-height:600px){:root{--toolbar-h:50px;--bottom-h:56px}.topbar{height:50px}.bottom-bar{height:56px}.page-inner{padding-top:24px}.cover-title{font-size:32px}.cover-badges{display:none}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}}

@media (max-width:620px){.cover-social{max-width:285px}.cover-social a{font-size:8.5px;padding:5px 7px}.author-links{gap:5px}.author-links a{font-size:9px;padding:5px 6px}}