/* Umut — a quiet, editorial study workspace. No external fonts or imagery. */
:root,html[data-theme="dark"]{
 --bg:#171b1a;--panel:#202523;--panel-2:#252b28;--line:#363e39;--text:#eef0e9;--muted:#a8b2a9;
 --brand:#b7d3ad;--brand2:#b7d3ad;--danger:#e7988b;--warning:#d9ba7d;
 --ui-accent:var(--brand);--ui-accent-2:var(--brand2);--accent-ink:#182d20;
 --radius:14px;--radius-sm:10px;--radius-lg:18px;--shadow:none;--shadow-lg:0 20px 55px #0003;--ui-shadow:none;
 --tint:#2e3b30;--paper:#dce9d6;
}
html[data-theme="light"]{
 --bg:#f3f2ed;--panel:#fffefa;--panel-2:#f7f7f1;--line:#dedfd5;--text:#26312a;--muted:#69746a;
 --brand:#345d42;--brand2:#345d42;--danger:#ae4a3a;--warning:#976d29;--accent-ink:#fff;
 --tint:#e8eddf;--paper:#dce9d6;--shadow:none;--shadow-lg:0 20px 55px #26312a14;
}
#app{font-family:"Segoe UI Variable Text","Segoe UI",system-ui,sans-serif;font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
::selection{background:var(--brand);color:var(--accent-ink)}
h1,h2,h3{font-weight:650;letter-spacing:-.035em;line-height:1.2}b,strong{font-weight:650;letter-spacing:-.015em}
small{color:var(--muted)}.eyebrow{color:var(--brand2);font-size:10px;font-weight:700;letter-spacing:.16em}
#app button{background:var(--brand);color:var(--accent-ink);border-radius:8px;box-shadow:none;font-weight:600;min-height:42px;transition:background .15s,border-color .15s;transform:none}
#app button:hover:not(:disabled){filter:brightness(.94)}#app button:disabled{opacity:.5;cursor:wait}
#app button.light{background:transparent;border-color:var(--line);color:var(--text)}
#app button.text-button{background:transparent;color:var(--brand)}
#app button.danger{background:transparent;color:var(--danger);border-color:color-mix(in srgb,var(--danger) 35%,var(--line))}
#app :is(button,a,summary):focus-visible{outline:2px solid var(--brand);outline-offset:4px}
#app :is(input,select,textarea),html[data-theme="light"] #app :is(input,select,textarea){border-radius:8px;background:var(--panel);color:var(--text);min-height:44px;box-shadow:none;border:1px solid var(--line);font-weight:400}
#app :is(input,textarea,select):focus{border-color:var(--brand);box-shadow:0 0 0 2px color-mix(in srgb,var(--brand) 12%,transparent)}
#app input[type="checkbox"]{min-height:0}#app label{font-size:12px;font-weight:600;gap:6px}
summary{font-size:13px;font-weight:600;color:var(--brand);cursor:pointer;padding-block:10px}
.help-box summary,.help-box summary::marker{color:var(--brand)!important}
#postponeAllowance{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center;padding:12px 0;margin-bottom:10px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
#postponeAllowance b{color:var(--text);font-weight:600}
.postpone-days{display:grid;gap:9px;margin:18px 0}.postpone-day{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid var(--line);border-radius:10px;cursor:pointer}.postpone-day input{width:18px!important;flex-shrink:0;accent-color:var(--brand)}.postpone-day span{min-width:0}.postpone-day b,.postpone-day small,.postpone-day em{display:block}.postpone-day small{margin-top:5px;color:var(--muted)}.postpone-day em{margin-top:7px;color:var(--brand);font-size:12px;font-style:normal}.postpone-day:has(input:checked){background:var(--tint);border-color:var(--brand)}.postpone-day:has(input:disabled){opacity:.5;cursor:not-allowed}
#app{grid-template-columns:232px minmax(0,1fr)}
#app>aside,html[data-theme="light"] #app>aside{width:232px;background:var(--panel)!important;box-shadow:none;border-right:1px solid var(--line);padding:26px 15px 16px}
.brand{padding:0 10px 30px;gap:12px}.brand>span{background-color:var(--brand)!important;background-image:none;color:var(--accent-ink)!important;border-radius:10px;box-shadow:none!important;width:38px;height:38px;font-size:22px;font-family:Georgia,serif}
.brand h2{font-size:17px;font-weight:700}.brand small{font-size:11px}.brand img{border-radius:10px!important;box-shadow:none}
#app>aside nav{gap:5px;padding-top:14px;border-top:1px solid var(--line)}
#app>aside nav button{background:transparent!important;border:0!important;color:var(--muted);font-size:13px;font-weight:500;min-height:44px;border-radius:7px!important}
#app>aside nav button:hover,#app>aside nav button.active,html[data-theme="light"] #app>aside nav button.active{background:var(--tint)!important;color:var(--text)!important}
#app>aside nav button.active{font-weight:650}#app>aside nav button:before{display:none!important}#app>aside nav button:after{color:var(--muted)!important;font-size:16px}
#logout{font-size:12px;min-height:40px;background:transparent!important}
#app>main{grid-column:2;max-width:1400px;padding:36px clamp(22px,4vw,60px) 48px}
#app>main>header{padding-bottom:25px;margin-bottom:28px;border-bottom:1px solid var(--line);min-height:86px;align-items:center}
#app>main>header h1{font-size:clamp(25px,2.7vw,37px);font-weight:600;letter-spacing:-.045em;margin-top:8px;line-height:1.18}
#date{font-size:11px;letter-spacing:.035em} .header-actions select{font-size:12px;min-height:38px!important;padding:8px 10px!important}
.card,.admin-command,.metrics article{background:var(--panel)!important;border:1px solid var(--line);border-radius:14px!important;box-shadow:none!important}
.card{padding:24px;margin-bottom:20px}.card>.head{margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.card>.head h2{font-size:19px;margin:4px 0}.card>.head p{font-size:13px;max-width:65ch}
.metrics{gap:12px}.metrics article{padding:20px 22px;min-height:116px;position:relative;overflow:hidden}
.metrics article:before,.metrics article:after{display:none!important}.metrics article span{font-size:12px;color:var(--muted)}
.metrics article b{font-size:31px;font-weight:550;letter-spacing:-.055em;font-variant-numeric:tabular-nums}.metrics article small{font-size:11px}
#studyDayCard{background:var(--tint)!important;border-color:transparent;margin-block:22px}#studyDayTotal{font-size:26px!important;font-weight:550;letter-spacing:-.04em}
#studyDayCard>.head{border-color:color-mix(in srgb,var(--muted) 22%,transparent)}#studyDayCard details{border-top:1px solid color-mix(in srgb,var(--muted) 22%,transparent)}
#studyDayCard details p{font-size:13px;color:var(--muted);max-width:70ch}#studyDayCard input{background:var(--panel)!important}
.today-flow{padding:24px}.help-box{background:transparent!important;border:0!important;border-bottom:1px solid var(--line)!important;border-radius:0!important;padding:0 0 10px!important;font-size:13px}
#tasks{counter-reset:lesson;gap:0!important}
#tasks .task{counter-increment:lesson;display:grid;grid-template-columns:minmax(0,1fr) auto;position:relative;padding:21px 12px 21px 49px!important;border:0!important;border-bottom:1px solid var(--line)!important;border-radius:0!important;background:transparent!important;box-shadow:none!important;gap:18px}
#tasks .task:last-child{border-bottom:0!important}
#tasks .task:before{content:counter(lesson,decimal-leading-zero);position:absolute;top:24px;left:2px;width:30px;height:auto;bottom:auto;background:none!important;color:var(--muted);font-size:11px;font-family:ui-monospace,Consolas,monospace}
#tasks .task b{font-size:15px;line-height:1.45}#tasks .task p{font-size:12px;margin:5px 0;color:var(--muted)}#tasks .task small{font-size:11px;line-height:1.7}
#tasks .task.task-done{opacity:.72}#tasks .task.task-done:before{content:'✓';color:var(--brand)}
.actions button{font-size:12px;min-height:36px;padding:8px 12px}.done-chip{background:var(--tint)!important;color:var(--brand)!important;font-size:11px;border-radius:5px!important}
.task-video-link{color:var(--brand)!important;background:var(--tint)!important;font-size:11px;font-weight:600}
.upcoming-task,.role-task,.session-row,.security-row{background:var(--panel-2)!important;border-radius:10px!important;box-shadow:none!important}.upcoming-task:before{display:none!important}
.empty,.empty-state{background:transparent!important;border:1px dashed var(--line)!important;border-radius:10px!important;padding:24px;color:var(--muted)}.empty-state b{font-size:14px;color:var(--text)}
.role-hero,html[data-theme="light"] .role-hero{background:var(--tint)!important;border:1px solid var(--line);box-shadow:none;border-radius:14px}
.role-hero h2{font-size:27px;font-weight:600}.role-controls,html[data-theme="light"] .role-controls{background:transparent!important;border-radius:8px}
.role-grid{gap:20px}.weekly-chart{background:transparent!important}.chart-bar,.chart-bar-fill{background:var(--brand)!important;border-radius:3px 3px 0 0}
.review-badge,.mini-count,.badge{font-size:11px;border-radius:5px!important;font-weight:600}
.review-badge.green,.health-good{color:var(--brand)!important}.review-badge.yellow,.health-warning{color:var(--warning)!important}.review-badge.red{color:var(--danger)!important}
.review-badge.green{background:var(--tint)!important}.review-badge.yellow{background:color-mix(in srgb,var(--warning) 12%,var(--panel))!important}.review-badge.red{background:color-mix(in srgb,var(--danger) 12%,var(--panel))!important}
.evidence-card{background:var(--panel-2)!important;padding:22px;border-radius:12px!important}.evidence-heading h3{font-size:17px}
.evidence-day-row,.evidence-summary-row{background:var(--panel)!important;color:var(--text)!important;box-shadow:none!important;border-radius:10px!important;transform:none!important}
#evidence .evidence-day-row:before{background:var(--brand)!important;width:2px}#evidence .evidence-day-row>span{background:var(--tint);border:0;color:var(--brand);border-radius:5px}
.ai-note{background:transparent!important;border:0!important;border-left:2px solid var(--line)!important;border-radius:0!important;padding:10px 15px}.ai-note b{font-size:12px}.ai-note p{font-size:13px}
.submission-stats span{font-size:11px;border-radius:5px;background:var(--panel)!important}.evidence-photo{border-radius:8px!important}
.account-tabs{background:var(--panel-2)!important;border-radius:8px!important;padding:4px}.account-tabs button{font-size:12px;border:0!important}
.system-health-grid{gap:10px}.system-health-item{background:var(--panel-2)!important;border-radius:10px!important;padding:15px!important;min-width:0}.system-health-item b{font-size:12px}.system-health-item small{font-size:11px}.system-health-item>span{font-size:13px}
.admin-table-wrap{border-radius:8px}.admin-table th{background:var(--panel-2)!important;font-size:10px}.admin-table td{font-size:12px}.admin-table tr:hover td{background:var(--tint)!important}
.ai-provider-panel,.agent-admin-card,.ai-key-row,.agent-facts span{border-radius:10px!important;background:var(--panel-2)!important}
#ai{--ai-composer:var(--panel-2)}#ai .ai-card,#ai .ai-history{box-shadow:none!important;border-radius:14px;background:var(--panel)!important}
#ai .chat,html[data-theme="light"] #ai .chat{background:var(--panel)!important}
#ai .bubble.user{background:var(--tint)!important;color:var(--text)!important;border-radius:12px 12px 3px 12px!important}
#ai .bubble.assistant,html[data-theme="light"] #ai .bubble.assistant{background:transparent!important;color:var(--text)!important;border:0!important;font-size:15px;line-height:1.8}
#ai .chat-form{background:var(--panel)!important;border-color:var(--line)!important}#ai .chat-form textarea{border-radius:12px!important;background:var(--panel-2)!important}
#ai .ai-history button{background:transparent!important;color:var(--text)!important;border-color:transparent!important}#ai .ai-history button.active{background:var(--tint)!important;border-color:var(--line)!important}
#ai #newConversation{background:var(--brand)!important;color:var(--accent-ink)!important}#conversationTitle{font-weight:600}
.message-center,.message-list{background:var(--panel)!important}.message-contacts,html[data-theme="light"] .message-contacts{background:var(--panel-2)!important}
.message-contacts button{background:transparent!important;color:var(--text)!important;border-radius:8px!important}.message-contacts button.active{background:var(--tint)!important;border-color:var(--line)!important}
.message-bubble{background:var(--panel-2)!important;color:var(--text)!important;box-shadow:none!important;border-radius:12px!important}.message-bubble.mine,.message-bubble.sent,.message-bubble.outgoing{background:var(--tint)!important;color:var(--text)!important}
#messages .chat-message>div{background:var(--panel-2)!important;color:var(--text)!important;box-shadow:none!important;border:1px solid var(--line)!important;border-radius:12px!important}
#messages .chat-message.mine>div{background:var(--tint)!important;color:var(--text)!important}
#pendingStudyList .task>div:first-child,#ownExtraStudies .task>div:first-child{min-width:0;flex:1}
#pendingStudyList .task b,#ownExtraStudies .task b{display:block;overflow-wrap:anywhere}
#pendingStudyList .task small,#ownExtraStudies .task small{display:block;margin-top:7px;line-height:1.5}
#pendingStudyList .task{flex-wrap:wrap;gap:12px;align-items:center}
#pendingStudyList .task .actions{flex-wrap:wrap;gap:8px}
#pendingStudyList .task button{white-space:normal;max-width:100%;flex-shrink:0}
#studyDayCard .head{flex-wrap:wrap;gap:18px}#studyDayCard .head>div{min-width:0;flex:1 1 240px}
#ai .chat-sidebar{background:var(--panel)!important;border-color:var(--line)!important;box-shadow:none!important}
.direct-message-form,.message-thread-title{background:var(--panel)!important}.message-thread-title{font-size:14px;font-weight:600}
dialog{background:var(--panel)!important;color:var(--text);border-radius:16px!important;box-shadow:var(--shadow-lg);padding:28px!important}dialog h2{font-size:22px}dialog p{font-size:13px;color:var(--muted)}dialog::backdrop{background:#10171399;backdrop-filter:blur(3px)}
.form-section{background:var(--panel-2)!important;border-radius:10px!important}.upload-zone{background:var(--panel)!important;border:1px dashed var(--line)!important;border-radius:10px!important}.calculation-note{background:var(--tint)!important;color:var(--brand)!important;padding:10px 12px;border-radius:6px;font-size:12px}
#toast{background:var(--text)!important;color:var(--bg)!important;border:0!important;font-size:13px;border-radius:8px!important;box-shadow:0 8px 25px #0002}
/* Authentication is self-contained in index.php and is deliberately not styled
   by authenticated assets. */
@media(min-width:821px) and (max-width:1100px){#app{grid-template-columns:200px minmax(0,1fr)}#app>aside{width:200px}#app>main{padding:28px 24px}}
@media(max-width:820px){
 #app>main{padding:22px 16px 28px!important}#app>main>header{gap:14px;margin-bottom:22px;padding-bottom:20px}#app>main>header h1{font-size:28px;line-height:1.2}.header-actions{justify-content:flex-end}
 #app>aside,html[data-theme="light"] #app>aside{background:var(--panel)!important;backdrop-filter:none;box-shadow:none;width:100%!important;border-top:1px solid var(--line)}
 #app>aside nav{background:var(--panel)!important;border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 45px #0002}#mobileMenuToggle{background:var(--brand)!important;color:var(--accent-ink)!important;min-width:110px;font-size:12px;border-radius:7px!important}#mobileCurrentView{font-size:13px;font-weight:600}
 .card{padding:19px!important;margin-bottom:16px;border-radius:12px!important}.card>.head{margin-bottom:15px;padding-bottom:12px}.card>.head h2{font-size:18px}.card>.head>button{width:auto!important}
 .dashboard-metrics,.role-metrics{grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:9px}.metrics article{min-height:106px;padding:16px!important;border-radius:10px!important}.metrics article b{font-size:26px}.metrics article span{font-size:11px}.metrics article small{font-size:10px}
 #studyDayCard>.head{display:grid;grid-template-columns:1fr;gap:14px}#studyDayCard>.head label{max-width:190px}#studyDayTotal{font-size:24px!important}
 #tasks .task{grid-template-columns:1fr;padding:18px 0 18px 36px!important;gap:12px}#tasks .task:before{top:21px;font-size:10px;width:25px}#tasks .task b{font-size:14px}.actions{display:flex;gap:8px;justify-content:flex-start}.actions button{width:auto!important;flex:0 1 auto;font-size:12px}.actions .light{color:var(--muted)}
 #pendingStudyList .task{display:flex;flex-direction:column;align-items:flex-start;gap:12px}#pendingStudyList .task>button{width:auto!important}
 .role-hero h2{font-size:23px}.role-grid{gap:14px}.system-health-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}.system-health-item{padding:12px!important}
 #ai .ai-card{border-radius:0!important}#ai .bubble.assistant{font-size:14px;line-height:1.75}#ai .chat-form textarea{min-height:48px;font-size:16px}
 dialog{border-radius:16px 16px 0 0!important;padding:22px 17px calc(22px + env(safe-area-inset-bottom))!important}input,textarea,select{font-size:16px!important}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.coach-review-hub{margin-bottom:20px}.coach-review-hub #roleSubmissions{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));gap:16px}.submission-mini{width:100%;text-align:left;gap:12px}.submission-mini>div{min-width:0}.submission-mini b{overflow-wrap:anywhere}.single-photo-viewer{width:100%;min-width:0}.single-evidence-image{display:block;width:100%;max-height:70vh;object-fit:contain;background:var(--panel-2);border-radius:8px}.single-evidence-image[hidden]{display:none}.photo-controls{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.photo-original{display:inline-block;padding:12px 0}.evidence-photos:has(.single-photo-viewer){display:block}.photo-loading{padding:30px;text-align:center}#admin .card,#admin .grid,#adminUsers,#admin .head>div{min-width:0}#admin .head{flex-wrap:wrap;gap:12px}#admin input,#admin select,#admin textarea{max-width:100%;min-width:0}.admin-table-wrap{max-width:100%;overflow-x:auto}.system-health-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,210px),1fr))!important}.system-health-item{min-width:0;overflow-wrap:anywhere}#admin .review-actions{flex-wrap:wrap}@media(max-width:760px){.photo-controls{flex-wrap:wrap}.photo-controls button{padding:10px}.coach-review-hub #roleSubmissions{grid-template-columns:1fr}#admin .grid{grid-template-columns:1fr!important}}
.review-toolbar{display:flex;align-items:end;flex-wrap:wrap;gap:14px;margin-bottom:18px}.review-toolbar label{display:grid;gap:6px;flex:1;min-width:180px;font-size:12px;color:var(--muted)}#coachReviewResults{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:10px}.coach-review-hub #roleSubmissions{display:block}.submission-mini{align-items:center}.submission-mini>div{display:grid;gap:6px;flex:1}.submission-mini .review-badge{white-space:normal;text-align:center;max-width:150px}.review-toolbar input,.review-toolbar select{width:100%}#app :is(button,a,input,select,textarea):focus-visible{outline:2px solid var(--brand);outline-offset:3px}@media(max-width:820px){#app :is(input,select,textarea){font-size:16px!important}.review-actions{display:flex;flex-wrap:wrap;gap:8px}.review-actions button{min-height:44px;flex:1}#aiForm,#messageForm{padding-bottom:env(safe-area-inset-bottom)}dialog{max-width:calc(100vw - 24px);max-height:calc(100dvh - 32px);overflow:auto}.submission-mini{flex-wrap:wrap}.submission-mini .review-badge{max-width:none}}
.connection-notice{position:fixed;top:10px;left:50%;transform:translateX(-50%);max-width:calc(100vw - 24px);padding:12px 18px;background:var(--panel);color:var(--text);border:1px solid var(--warning);border-radius:8px;z-index:10000}.connection-notice[hidden]{display:none}.student-quick-actions{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 18px}.student-quick-actions button{min-height:44px}@media(max-width:600px){.student-quick-actions{display:grid;grid-template-columns:1fr 1fr}.student-quick-actions button:last-child{grid-column:1/-1}}
#bookContents .book-page{border-top:1px solid var(--line);padding:14px 0}#bookContents .book-page summary{cursor:pointer;overflow-wrap:anywhere;padding:8px 0}#bookContents .book-page-body{padding-top:14px}#bookContents fieldset{border:1px solid var(--line);padding:16px;border-radius:8px;margin:16px 0}#bookContents table{width:100%;min-width:640px}#bookContents td input{width:100%;min-width:90px}#bookContents th{text-align:left;padding:10px}#bookContents .book-photo img{width:100%;max-height:70vh;object-fit:contain;margin:12px 0}#bookContents .book-edit-form>label{display:grid;gap:8px;margin:12px 0}
#bookCreateForm{display:grid!important;grid-template-columns:minmax(0,1fr) auto!important;gap:14px;align-items:end}#bookCreateForm .book-create-button{width:auto;min-height:44px;padding:12px 24px;align-self:end}#bookBatchList{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:12px;margin-top:20px}#bookBatchList .book-batch-card{background:var(--panel-2)!important;color:var(--text)!important;border:1px solid var(--line)!important;padding:18px!important;min-height:100px}#bookBatchList .book-batch-card small{color:var(--muted)!important}#bookContents .button{display:inline-flex;text-decoration:none;background:var(--panel-2);border:1px solid var(--line);color:var(--text);padding:10px 16px;border-radius:8px;align-items:center}#bookContents .book-reader-toolbar{display:flex;align-items:end;flex-wrap:wrap;gap:14px;border-top:1px solid var(--line);padding-top:18px;margin-top:18px}#bookContents .book-reader-toolbar label{display:grid;gap:6px;flex:1;min-width:180px}#bookContents .book-page summary{display:flex;align-items:center;gap:14px;list-style:none}#bookContents .book-page-number{width:32px;height:32px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;color:var(--muted);flex-shrink:0}#bookContents .book-page-title{flex:1;min-width:0;display:grid;gap:5px}#bookContents .book-page-title small{color:var(--muted);font-size:11px}#bookContents .book-status{font-size:11px;color:var(--muted);text-align:right}#bookContents .book-pagination{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px}#adminWorkspace .workspace-links{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}#adminWorkspace .workspace-day{padding:14px 0;border-top:1px solid var(--line)}#adminWorkspace .workspace-day summary{cursor:pointer;padding:8px 0}#adminWorkspace .submission-mini{background:var(--panel-2)!important;color:var(--text)!important;margin:8px 0}#adminWorkspace label{display:grid;gap:8px}@media(max-width:600px){#bookCreateForm{grid-template-columns:1fr!important}#bookCreateForm .book-create-button{width:100%}#bookContents .book-page summary{flex-wrap:wrap}#bookContents .book-status{width:100%;text-align:left;margin-left:46px}#adminWorkspace .grid{grid-template-columns:1fr!important}}
#app>aside nav{display:flex;flex-direction:column;gap:5px;padding:8px 0!important}#app>aside nav button{display:flex!important;align-items:center!important;gap:12px!important;position:relative;min-height:46px!important;padding:11px 14px!important;width:100%;text-align:left!important;font-size:13px!important;line-height:1.4!important;border-radius:9px!important;color:var(--muted)!important;transition:background .15s,color .15s}#app>aside nav button.hidden{display:none!important}#app>aside nav button:after,#app>aside nav button:before{display:none!important;content:none!important}#app>aside nav button .nav-icon{width:20px;height:20px;display:flex;align-items:center;justify-content:center;flex:0 0 20px;color:inherit}#app>aside nav button .nav-icon svg{width:20px;height:20px;display:block}#app>aside nav button .nav-label{display:block;flex:1;min-width:0;font-weight:500}#app>aside nav button:hover{background:var(--panel-2)!important;color:var(--text)!important}#app>aside nav button.active{background:var(--tint)!important;color:var(--text)!important;box-shadow:inset 3px 0 0 var(--brand)}#app>aside nav button.active .nav-icon{color:var(--brand)}#app>aside nav button.active .nav-label{font-weight:650}@media(max-width:820px){#app>aside nav button{min-height:48px!important;font-size:14px!important;padding:12px 15px!important}#app>aside nav{padding:8px!important}}
.book-header-actions{display:flex;flex-wrap:wrap;gap:8px}.book-notice{padding:16px 18px;border:1px solid var(--line);background:var(--tint);color:var(--text);border-radius:10px;line-height:1.6;margin:16px 0}.book-notice[hidden]{display:none}#bookResetDialog{max-width:480px;background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:14px;padding:26px}#bookResetDialog p{line-height:1.7;color:var(--muted)}#bookContents .book-page-body{background:var(--panel-2);padding:18px;border-radius:10px;margin-top:10px}#bookContents .book-edit-form>button{margin:6px 8px 6px 0}@media(max-width:600px){.book-header-actions{width:100%}.book-header-actions button{flex:1}#bookContents .book-page-body{padding:12px}}
/* Android app install and in-app feedback. */
.app-feedback-item{display:grid;grid-template-columns:1fr auto;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.app-feedback-item small{display:block;color:var(--muted);margin-top:4px}.app-feedback-item p{white-space:pre-wrap;margin:10px 0 0}
.android-install-banner{position:fixed;z-index:2400;left:12px;right:12px;bottom:12px;display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:12px;padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:color-mix(in srgb,var(--panel) 96%,transparent);box-shadow:0 20px 60px rgba(0,0,0,.42);backdrop-filter:blur(20px)}.android-install-banner.hidden{display:none}.android-install-banner div{display:grid;gap:3px}.android-install-banner span{font-size:12px;color:var(--muted)}.android-install-banner a{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 16px;border-radius:11px;background:var(--brand);color:#142018;font-weight:800;text-decoration:none}.android-install-banner>button{width:42px;min-width:42px;padding:0;font-size:22px;background:transparent}.app-feedback-button{position:fixed;z-index:1200;right:14px;bottom:calc(82px + env(safe-area-inset-bottom));box-shadow:0 12px 35px rgba(0,0,0,.35)}#appFeedbackDialog form{display:grid;gap:14px;min-width:min(460px,90vw)}#appFeedbackDialog textarea{min-height:150px}
@media(max-width:600px){.android-install-banner{grid-template-columns:1fr auto;bottom:10px}.android-install-banner a{grid-column:1/-1;grid-row:2}.android-install-banner>button{grid-column:2;grid-row:1}.app-feedback-button{right:10px}}
.login-app-download{display:grid;gap:3px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:color-mix(in srgb,var(--brand) 11%,transparent);color:var(--text);text-decoration:none;text-align:left}.login-app-download span{font-size:11px;color:var(--muted)}.login-app-download:hover{border-color:var(--brand);transform:translateY(-1px)}.sidebar-app-download{display:flex;align-items:center;gap:10px;margin:12px 2px;padding:11px 12px;border:1px solid var(--line);border-radius:12px;color:var(--text);text-decoration:none;background:color-mix(in srgb,var(--brand) 8%,transparent)}.sidebar-app-download>span{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--brand);color:#142018;font-weight:900}.sidebar-app-download div{display:grid;min-width:0}.sidebar-app-download b{font-size:12px}.sidebar-app-download small{font-size:10px;color:var(--muted)}@media(max-width:820px){.sidebar-app-download{margin-top:8px}}

/* Admin layout: compact actions, readable composer and one logout per viewport. */
#adminSecurityCenter>.head{display:flex;align-items:center;justify-content:flex-start;gap:10px;padding-bottom:20px}
#adminSecurityCenter>.head>div:first-child{flex:1 1 420px}
#adminSecurityCenter>.head>button{flex:0 0 auto;width:auto;margin:0;white-space:nowrap}
#adminSecurityCenter>.head h2{margin:10px 0 8px}
#adminSecurityCenter>.head p{margin:0;max-width:680px;color:var(--muted);line-height:1.6}
#admin .admin-message-card{border:1px solid var(--line);background:var(--panel);padding:22px;margin:0 0 24px}
#admin .admin-message-card>.head{border-bottom:0;padding-bottom:12px;margin-bottom:0}
#admin .admin-message-card h2{font-size:19px;margin:6px 0}
#admin .admin-message-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
#adminMessageForm{gap:14px;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
#adminMessageForm textarea{min-height:96px;resize:vertical}
#adminMessageForm>button.wide{grid-column:1/-1;justify-self:end;width:auto;min-width:160px;padding:12px 22px}
#adminMessageHint{margin-top:12px;padding:10px 14px;border-radius:8px;font-size:13px}
#app>aside nav .nav-icon,#app>aside nav .nav-icon svg{visibility:visible!important;opacity:1!important;display:block!important}
@media(min-width:821px){#app>aside nav button.mobile-logout{display:none!important}}
@media(max-width:820px){#adminSecurityCenter>.head>div:first-child{flex-basis:100%}#adminSecurityCenter>.head>button{flex:1;white-space:normal}#admin .admin-message-card{padding:16px}#adminMessageForm{grid-template-columns:1fr}#adminMessageForm>button.wide{width:100%}#app>aside nav button.mobile-logout{order:99;margin-top:12px;border-top:1px solid var(--line);border-radius:0}}
.book-live-summary{display:flex;align-items:center;gap:10px;margin:16px 0;padding:13px 16px;border:1px solid var(--line);border-radius:9px;background:var(--panel-2);font-size:13px;line-height:1.6;overflow-wrap:anywhere}
.book-live-dot,.book-status.is-reading:before{content:'';display:inline-block;width:8px;height:8px;flex:0 0 8px;border-radius:50%;background:var(--brand);animation:book-reading-pulse 1.8s ease-in-out infinite}
.book-status.is-reading{color:var(--brand);display:inline-flex;align-items:center;gap:8px;font-weight:650}
@keyframes book-reading-pulse{0%,100%{opacity:1}50%{opacity:.3}}
@media(prefers-reduced-motion:reduce){.book-live-dot,.book-status.is-reading:before{animation:none}}
.book-comparison{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:22px;align-items:start}.book-comparison>*,.book-comparison fieldset{min-width:0}.book-source-pane{position:sticky;top:16px}.book-source-pane .book-photo img{width:100%;max-height:78vh;object-fit:contain}.book-comparison .book-edit-form{margin:0}.book-comparison h3{font-size:16px;margin:0 0 14px}.book-cover-preview img{display:block;width:100%;max-height:300px;object-fit:contain;background:var(--panel-2);margin:12px 0}.book-comparison table{min-width:600px}.book-comparison input[data-field="page"]{min-width:145px}.book-source-pane .bookShowPhoto{margin-bottom:12px}
@media(max-width:960px){.book-comparison{grid-template-columns:1fr}.book-source-pane{position:static;grid-row:1}.book-source-pane .book-photo img{max-height:55vh}}
.book-status.is-approved{display:inline-flex;padding:6px 10px;border-radius:6px;background:var(--tint);color:var(--brand);font-weight:650}
.book-comparison table textarea[data-field]{width:100%;min-width:160px;min-height:96px;resize:vertical;white-space:pre-wrap;line-height:1.5;padding:10px;font:inherit}.book-comparison table td:nth-child(2){min-width:240px}.book-comparison table textarea[data-field="topic"]{min-width:220px}
.book-row-controls{min-width:110px;vertical-align:top}.book-row-controls button{display:block;width:100%;padding:8px 10px;margin:0 0 6px;font-size:12px;white-space:nowrap}.book-row-controls [data-row-action="delete"]{color:var(--danger)}
.book-comparison .book-row-controls{position:sticky;left:0;z-index:2;background:var(--panel);border-right:1px solid var(--line)}.book-comparison table th:first-child{position:sticky;left:0;z-index:3;background:var(--panel)}.book-comparison table td:nth-child(2){min-width:180px}.book-comparison table td:nth-child(3){min-width:240px}
#desktopSidebarToggle{display:none}
@media(min-width:821px){#desktopSidebarToggle{display:inline-flex;align-items:center;width:auto;gap:8px;padding:9px 14px;margin:0 0 18px;font-size:13px}#app.sidebar-collapsed{grid-template-columns:0 minmax(0,1fr)!important}#app.sidebar-collapsed>aside{display:none!important}#app.sidebar-collapsed>main{grid-column:2!important;max-width:none!important;width:100%!important;margin:0!important}#app.sidebar-collapsed .book-comparison{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)}}
.book-settings-dialog{background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:12px;padding:24px;max-width:480px;width:calc(100% - 32px)}.book-settings-dialog form{display:grid;gap:14px}.book-settings-dialog::backdrop{background:#0008}#bookArchiveToggle{margin:14px 0}#bookLibraryRows details{margin-top:16px;padding:14px;border:1px solid var(--line);border-radius:8px}#bookLibraryRows td{padding:10px;white-space:normal;min-width:100px}#bookLibraryRows td:nth-child(6){min-width:260px}
.book-area-editor{margin-top:18px;padding:14px;border:1px solid var(--line);border-radius:8px}.book-area-editor p{font-size:13px;line-height:1.5}.book-area-stage{position:relative;touch-action:none;user-select:none;cursor:crosshair}.book-area-stage img{display:block;width:100%;height:auto;pointer-events:none}.book-area-box{position:absolute;border:3px solid var(--brand);box-sizing:border-box;pointer-events:none;background:rgba(150,210,150,.08)}.book-area-editor button{margin:8px 6px 0 0;font-size:12px;padding:10px}
/* Simple teacher book workspace; technical configuration is server-managed. */
#bookContents .book-usage-card{background:var(--panel-2)!important;margin:24px 0;padding:22px}
#bookContents .book-usage-heading{display:flex;justify-content:space-between;align-items:center;gap:16px}
#bookContents .book-usage-heading h3{margin:8px 0;font-size:1.1rem}
#bookContents .book-usage-metrics{display:grid;grid-template-columns:1fr 1fr 1.35fr;margin-top:20px;gap:20px}
#bookContents .book-usage-metrics article{min-width:0;display:flex;flex-direction:column;gap:8px;padding:6px 16px;border-left:2px solid var(--line)}
#bookContents .book-usage-metrics span,#bookContents .book-usage-metrics small{color:var(--muted);font-size:.85rem}
#bookContents .book-usage-metrics strong{font-size:2rem;line-height:1.2;color:var(--text);font-variant-numeric:tabular-nums}
#bookContents .book-reader-state{border-color:var(--brand)}
#bookContents .book-reader-state strong{font-size:1.25rem;color:var(--brand);margin:6px 0}
#bookContents .book-usage-note{font-size:.8rem;color:var(--muted);margin:16px 0 0;line-height:1.6}
#bookContents #bookCreateForm{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:14px;padding:18px;background:var(--panel-2);border:1px solid var(--line);border-radius:12px;margin-top:20px}
#bookContents #bookCreateForm button{width:auto;min-height:52px;padding-inline:24px}
#bookContents #bookBatchList{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:12px;margin-top:16px}
#bookContents .book-batch-card{display:flex;align-items:center;justify-content:space-between;gap:14px;min-width:0;padding:20px;text-align:left;background:var(--panel-2)!important;color:var(--text)!important;border:1px solid var(--line);border-radius:12px}
#bookContents .book-batch-card b{display:block;overflow-wrap:anywhere;line-height:1.5}
#bookContents .book-batch-card small{display:block;color:var(--muted);line-height:1.6;margin-top:8px}
#bookContents .book-batch-card>span{flex-shrink:0;color:var(--brand);font-size:1.3rem}
#bookContents .book-batch-card:hover{border-color:var(--brand)}
#bookContents button:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
@media(max-width:650px){
 #bookContents .book-usage-card{padding:16px}
 #bookContents .book-usage-metrics{grid-template-columns:1fr 1fr;gap:18px 10px}
 #bookContents .book-reader-state{grid-column:1/-1}
 #bookContents .book-usage-heading{align-items:flex-start}
 #bookContents .book-usage-heading h3{line-height:1.5}
 #bookContents #bookCreateForm{grid-template-columns:1fr;padding:14px}
 #bookContents #bookCreateForm button{width:100%}
}