.mobile-menu,.mobile-nav-close,.reader-mobile-tabs{display:none}
@media(max-width:900px){
html{scroll-padding-top:116px}.library-page{--mobile-accent:#6955a6}.library-page.role-teacher{--mobile-accent:#357b73}
.library-page .sidebar,.library-page.role-teacher .sidebar{position:fixed;inset:0 auto 0 0;width:min(310px,86vw);height:100dvh;padding:28px 22px calc(24px + env(safe-area-inset-bottom));overflow-y:auto;z-index:101;display:flex;flex-direction:column;background:#fff;transform:translateX(-100%);visibility:hidden;transition:transform .25s ease,visibility .25s;border-right:1px solid #e7e4ef}
.library-page.mobile-nav-open{overflow:hidden}.library-page.mobile-nav-open .sidebar{transform:translateX(0);visibility:visible}.mobile-nav-close{display:block;align-self:flex-end;border:0;background:transparent;color:#898395;font-size:25px;min-width:44px;min-height:44px;margin:-16px -10px 0 0}.mobile-menu{display:grid;place-items:center;flex-shrink:0;width:44px;height:44px;border:1px solid #e6e3ed;border-radius:8px;background:white;color:var(--mobile-accent);font-size:21px}
#mobile-backdrop{position:fixed;inset:0;width:100%;height:100dvh;z-index:100;background:#211a394d;border:0;padding:0}
.library-page .sidebar .college{display:block;margin-top:26px}.library-page .sidebar .nav-label{display:block;margin-top:30px}.library-page .sidebar nav{display:block;overflow:visible;margin-top:10px;padding:0}.library-page .sidebar nav button{width:100%;min-height:48px;gap:14px;padding:12px 13px;font-size:14px;white-space:normal}.library-page .sidebar nav .nav-icon,.library-page .sidebar nav .nav-count{display:inline-block}.library-page .sidebar-bottom{display:block;margin-top:auto;padding:32px 13px 0}.library-page .sidebar-quotation{margin-bottom:24px}.library-page .sidebar-support button,.library-page .sidebar-support summary{min-height:44px;display:flex;align-items:center}
.library-page .workspace,.library-page.role-teacher .workspace{margin-left:0}.library-page .workspace>header{position:sticky;top:0;z-index:20;display:flex;flex-wrap:wrap;align-items:center;height:auto;min-height:68px;padding:10px 16px;gap:8px;border-bottom:1px solid #e8e5ed}.library-page .workspace>header>span{display:none}.library-page .account{flex:1;justify-content:flex-end;gap:12px;min-width:0}.library-page .account button{min-height:44px}.library-page .account>a{font-size:12px}.library-page .development-badge{display:none}.library-page .profile-trigger{gap:6px}.library-page .profile-avatar{width:34px;height:34px}
.library-page main{padding:26px 20px 24px;max-width:800px}.library-page .books{grid-template-columns:repeat(2,minmax(0,1fr))}.library-page .intro h1{font-size:27px}.library-page .edition{display:none}.library-page #subjects{overflow-x:auto;width:100%;padding-bottom:4px;gap:4px}.library-page #subjects button{white-space:nowrap;min-height:40px;flex-shrink:0}.library-page .filter-row{min-width:0}.library-page .book h3{font-size:20px;overflow-wrap:anywhere}.library-page .book-head{min-height:0}.library-page .book-meta{letter-spacing:0}.library-page .card-bottom{gap:10px}.library-page .card-bottom button{min-height:44px}
.library-page .course-controls{flex-wrap:wrap;gap:12px}.library-page .course-controls select{min-height:40px;max-width:100%}.library-page .grade-heading{padding:22px 18px}.library-page .grade-caption{line-height:1.8}.library-page .course-options{grid-template-columns:repeat(2,minmax(0,1fr))}.library-page .curriculum-notes{overflow-wrap:anywhere}
dialog{max-height:calc(100dvh - 32px);overflow-y:auto;overscroll-behavior:contain}dialog .close{min-width:44px;min-height:44px;top:6px;right:8px}form input,form textarea,form select,#search,#favorites-search{font-size:16px!important}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}button,summary{touch-action:manipulation}.teacher-dialog,.profile-dialog,.favorites-dialog{width:calc(100% - 28px);padding:28px 22px}dialog h2{padding-right:26px}.teacher-entry{min-height:68px}.teacher-entry-tools button{min-height:44px}
.login-page{display:block}.login-story{min-height:0;padding:26px 24px 18px}.login-story .brand{font-size:18px}.login-quote{margin:18px 0 0}.login-story .quote-slides{height:160px;min-height:0;margin:0}.login-story .quote-slide blockquote{font-size:23px;line-height:1.65;min-height:0}.login-story .quote-slide figcaption{font-size:12px;margin-top:12px}.login-story .login-foot{display:none}.login-main{padding:30px 24px calc(30px + env(safe-area-inset-bottom))}.login-card{width:min(440px,100%);margin:auto}.login-card #auth-title{white-space:normal;line-height:1.6;font-size:23px;text-wrap:balance}
}
@media(max-width:600px){
.library-page main{padding:24px 16px}.library-page .books,.library-page.role-teacher .books{grid-template-columns:minmax(0,1fr);gap:16px}.library-page .intro h1,.library-page.role-teacher .intro h1{font-size:25px;letter-spacing:0}.library-page .intro-slogans{height:42px}.library-page .search-wrap{margin-top:14px;height:52px}.library-page .library{margin-top:26px}.library-page .section-heading{gap:8px}.library-page .section-heading>div{gap:8px}.library-page .section-heading h2{font-size:18px}.library-page .sort{white-space:nowrap}.library-page .sort select{max-width:88px}.library-page .book-head{padding:20px}.library-page .book-body{padding:16px 20px 0}.library-page .book-description{font-size:14px;line-height:1.9}.library-page .course-options{grid-template-columns:1fr;max-height:none}.library-page .grade-overview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:18px;gap:14px}.library-page .grade-overview>:last-child{grid-column:1/-1}.library-page .grade-heading{gap:10px}.library-page .grade-heading h2{font-size:22px}.library-page .course-controls{padding:16px}.library-page .course-controls label{display:flex;align-items:center;gap:6px}.library-page .collection-filter{flex-wrap:wrap}.library-page .course-note{line-height:1.8}.library-page .form-grid{grid-template-columns:1fr}.library-page footer{font-size:10px;line-height:1.8}
#detail{padding:28px 20px;width:calc(100% - 24px);max-height:calc(100dvh - 24px)}.entry-heading{padding-right:8px;margin-top:10px}.entry-cover{width:60px}.entry-actions{gap:7px}.entry-actions>a,.entry-actions>button{min-height:46px;font-size:12px;padding:10px 6px;gap:5px}.entry-actions .bi{font-size:15px}.entry-actions .favorite-toggle i{width:auto}.favorite-row{gap:10px}.favorite-row>div{min-width:0}.favorite-title{overflow-wrap:anywhere}.favorites-dialog .favorite-row{flex-wrap:wrap}
}
@media(max-width:760px){
.preview-page{height:100dvh;overflow:hidden}.preview-page .preview-header{display:flex;position:relative;flex-wrap:wrap;gap:8px;padding:8px 12px;min-height:0;background:white}.preview-page .preview-header>a:first-child{padding:6px 0;min-height:36px;display:flex;align-items:center;font-size:12px}.preview-page .preview-header>div{flex:1 1 60%;min-width:0}.preview-page .preview-header strong{font-size:13px}.preview-page .preview-header small{font-size:10px;margin-top:2px}.preview-page .preview-header label{flex:1;font-size:12px;min-width:0}.preview-page .preview-header select{min-width:0;width:100%;max-width:100%;height:40px;font-size:16px}.preview-page .preview-header .primary,.preview-page #reader-add-version{min-height:40px;font-size:12px;padding:10px;box-sizing:border-box}.reader-mobile-tabs{display:flex;flex-shrink:0;padding:5px 12px 8px;gap:6px;background:#fff;border-bottom:1px solid #e7e2ef}.reader-mobile-tabs button{flex:1;border:0;border-radius:7px;background:transparent;color:#85778e;min-height:42px;font-size:14px}.reader-mobile-tabs button[aria-pressed=true]{background:#eee9f6;color:#6955a6}.role-teacher .reader-mobile-tabs button[aria-pressed=true]{background:#e2efec;color:#357b73}
.preview-page .reading-layout{display:block;flex:1;min-height:0;height:auto;overflow:hidden}.preview-page .preview-main{height:100%;min-height:0}.preview-page .reading-assistant{height:100%;min-height:0;border:0;padding:14px 16px calc(10px + env(safe-area-inset-bottom))}.preview-page[data-reader-pane=document] .reading-assistant{display:none}.preview-page[data-reader-pane=assistant] .preview-main{display:none}.preview-page .preview-footer{display:none}.preview-page #reading-question{font-size:16px;min-height:65px;max-height:110px}.preview-page #reading-form{padding-top:10px}.preview-page #reading-form small{font-size:10px}.preview-page #reading-index-status{margin:3px 0 9px;font-size:10px}.preview-page .reading-heading .eyebrow{display:none}.preview-page .reading-heading h2{font-size:17px;margin:0}.preview-page .reading-prompts{flex-wrap:nowrap;overflow-x:auto}.preview-page .reading-prompts button{min-height:38px;white-space:nowrap;flex-shrink:0}.preview-page #new-chat,.preview-page #send-question{min-height:40px}.preview-page #reading-messages{padding:12px 0;overscroll-behavior:contain}.preview-page .reading-sources button{min-height:40px}.preview-page .preview-main pre{margin:0;padding:18px;font-size:15px;width:100%}
}
@media(max-width:360px){.library-page .account{gap:7px}.library-page .account>a{font-size:11px}.library-page .account button{font-size:11px;padding:6px}.library-page .profile-trigger>span:last-child{display:none}.entry-actions>a,.entry-actions>button{gap:3px}}