:root{
  --bg:#f7fbff;--panel:#ffffff;--panel2:#f1f7ff;--ink:#152033;--muted:#69768a;--line:#d8e5f3;
  --accent:#5968ff;--accent2:#00a9d9;--good:#0aaf76;--danger:#df4768;--warn:#ec9f2d;
  --shadow:0 22px 70px rgba(42,74,110,.13);--soft:0 10px 30px rgba(42,74,110,.09);
  --r:26px;--r2:18px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(circle at 8% 0,#e4f7ff,transparent 32%),radial-gradient(circle at 90% 12%,#f1eeff,transparent 34%),linear-gradient(180deg,#fbfdff,#edf6ff 58%,#f9fcff);color:var(--ink)}
button,input,textarea,select{font:inherit}a{color:inherit;text-decoration:none}.hidden{display:none!important}.app{width:min(1760px,100%);margin:auto;padding:22px}.adminAppShell{width:min(1860px,100%)}
.topbar{position:sticky;top:12px;z-index:30;display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:24px;padding:14px 16px;border-radius:30px;border:1px solid rgba(255,255,255,.86);background:rgba(255,255,255,.78);box-shadow:var(--soft);backdrop-filter:blur(18px)}
.brand{display:flex;align-items:center;gap:12px;font-weight:1000}.brand small{display:block;color:var(--muted);font-weight:750;font-size:12px;margin-top:2px}.logo{width:46px;height:46px;border-radius:16px;display:grid;place-items:center;color:white;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 12px 28px rgba(89,104,255,.22);font-weight:1000}.nav,.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spread{display:flex;justify-content:space-between;align-items:center;gap:16px}.stack{display:flex;flex-direction:column;gap:14px}.grid{display:grid;gap:20px}.grid.two{grid-template-columns:1fr 1fr}.grid.three{grid-template-columns:repeat(3,1fr)}
.btn,.ghost,.danger,.good,.warn{border:0;border-radius:15px;padding:12px 17px;font-weight:900;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.18s transform,.18s box-shadow,.18s filter,.18s background;white-space:nowrap}.btn{color:white;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 14px 32px rgba(89,104,255,.18)}.ghost{color:#26364e;background:#fff;border:1px solid var(--line);box-shadow:0 8px 22px rgba(42,74,110,.07)}.danger{color:white;background:linear-gradient(135deg,#df4768,#ff7b94)}.good{color:white;background:linear-gradient(135deg,#0aaf76,#23d09b)}.warn{color:#654106;background:#fff4d9;border:1px solid #f4d392}.tiny{padding:8px 11px;border-radius:12px;font-size:12px}.btn:hover,.ghost:hover,.danger:hover,.good:hover,.warn:hover{transform:translateY(-2px);filter:brightness(1.02);box-shadow:0 14px 36px rgba(42,74,110,.14)}.btn:disabled,.ghost:disabled{opacity:.55;cursor:not-allowed;transform:none}.ghost.active,.lessonChip.active,.pageTile.active,.sectionBtn.active,.inspectorTab.active,.tabBtn.active{background:linear-gradient(135deg,#f0f3ff,#e7f8ff);border-color:#95b4ff;color:#243a8a}
.card{background:rgba(255,255,255,.84);border:1px solid rgba(255,255,255,.92);box-shadow:var(--shadow);border-radius:var(--r);padding:24px}.card.flat{box-shadow:var(--soft)}.muted{color:var(--muted);line-height:1.55}.pill{display:inline-flex;align-items:center;gap:7px;border-radius:999px;padding:8px 12px;background:#eef6ff;color:#314463;border:1px solid var(--line);font-weight:900;font-size:12px}.pageTitle{margin:8px 0 4px;letter-spacing:-.055em;font-size:clamp(28px,4vw,52px);line-height:1}.sideTitle{letter-spacing:-.04em;margin:0 0 6px}.empty{border:1px dashed #b6cadf;border-radius:22px;padding:24px;text-align:center;color:var(--muted);background:#f8fbff}hr{border:0;border-top:1px solid var(--line);margin:18px 0}label{display:block;margin:0 0 7px;color:#4e5c70;font-size:12px;text-transform:uppercase;letter-spacing:.08em;font-weight:1000}.help{font-size:12px;color:var(--muted);line-height:1.45;margin-top:7px}input,textarea,select,.field{width:100%;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:15px;padding:12px 13px;outline:none;transition:.18s border-color,.18s box-shadow}textarea{min-height:110px;resize:vertical}input:focus,textarea:focus,select:focus,.richArea:focus{border-color:#93aaff;box-shadow:0 0 0 4px rgba(89,104,255,.11)}
.authShell{min-height:calc(100vh - 130px);display:grid;grid-template-columns:minmax(310px,460px) 1fr;gap:24px;align-items:start}.cleanAuth{grid-template-columns:minmax(300px,430px) 1fr}.authPanel{position:sticky;top:106px}.authTabs{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px}.authForm{margin-top:0}.loginContent{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}.loginBlock{overflow:hidden}.loginBlock h3{margin:0 0 10px}.loginBlock img,.loginBlock video{width:100%;border-radius:18px;border:1px solid var(--line);display:block}
.bookGallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(245px,1fr));gap:18px;margin-top:18px}.bookCard{position:relative;overflow:hidden;min-height:295px;cursor:pointer;isolation:isolate;background:rgba(255,255,255,.84)}.bookCard:before{content:"";position:absolute;inset:-35%;background:radial-gradient(circle at 20% 12%,rgba(0,169,217,.18),transparent 25%),radial-gradient(circle at 80% 75%,rgba(89,104,255,.15),transparent 30%);z-index:-1;transition:.45s transform}.bookCard:hover:before{transform:rotate(8deg) scale(1.06)}.cover{height:180px;border-radius:22px;border:1px solid #d3e0ef;background:linear-gradient(135deg,#eef1ff,#e8f9ff);display:grid;place-items:center;overflow:hidden;box-shadow:inset 0 0 28px rgba(255,255,255,.7)}.cover img{width:100%;height:100%;object-fit:cover}.coverText{font-size:42px;font-weight:1000;letter-spacing:-.08em;color:#6573aa}
.readerWrap{display:grid;grid-template-columns:292px 1fr;gap:20px}.readerSide{position:sticky;top:106px;height:calc(100vh - 130px);overflow:auto}.lessonStrip{display:flex;gap:10px;overflow:auto;padding:4px 0 10px}.lessonChip{flex:0 0 auto;border:1px solid var(--line);background:#fff;padding:11px 14px;border-radius:16px;cursor:pointer;font-weight:900}.pageStage{min-height:calc(100vh - 180px);display:grid;place-items:center;perspective:1600px}.readerTools{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:16px}.range{width:150px}
.bookPage{width:min(100%,1060px);aspect-ratio:1.52/1;border:1px solid #5c6875;border-radius:8px;padding:8px;background:#fff;color:#111827;box-shadow:0 28px 90px rgba(48,74,111,.17),inset 0 0 0 1px #fff;position:relative;transform-origin:center center;transition:.55s transform,.35s opacity}.bookPage.flipNext{animation:flipNext .55s ease}.bookPage.flipPrev{animation:flipPrev .55s ease}@keyframes flipNext{0%{transform:rotateY(0)}45%{transform:rotateY(-12deg) translateX(-7px);filter:brightness(.96)}100%{transform:rotateY(0)}}@keyframes flipPrev{0%{transform:rotateY(0)}45%{transform:rotateY(12deg) translateX(7px);filter:brightness(.98)}100%{transform:rotateY(0)}}.pageHead{display:none}.blockGrid{height:100%;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:3px}.pageBlock{position:relative;overflow:hidden;border:2px solid #2f3945;border-radius:0;background:#fff;color:#111;cursor:pointer;transition:.16s transform,.16s box-shadow}.pageBlock:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(17,24,39,.16);z-index:2}.pageBlock.active{outline:4px solid rgba(89,104,255,.35);outline-offset:-4px}.cellImage{height:66%;display:grid;place-items:center;background:linear-gradient(135deg,#f5fbff,#fff7dd);overflow:hidden}.cellImage img{width:100%;height:100%;object-fit:cover}.cellImage .cellPlaceholder{font-weight:1000;font-size:13px;color:#8390a2;text-align:center;padding:10px}.cellText{height:34%;border-top:2px solid #2f3945;background:#fff;padding:5px 6px;overflow:hidden;font-size:clamp(10px,1vw,16px);line-height:1.15}.cellText h3{margin:0 0 2px;font-size:1em;line-height:1.08;display:inline;font-weight:900}.cellText .textBody{display:inline}.cellText p{margin:0}.pdfBadge{display:inline-flex;padding:2px 6px;border-radius:5px;background:#eef4ff;border:1px solid #cddcff;font-size:.75em;font-weight:900;margin-left:4px}.videoBadge{display:inline-flex;padding:2px 6px;border-radius:5px;background:#fff5df;border:1px solid #f5d38a;font-size:.75em;font-weight:900;margin-left:4px}.coverPage{height:100%;display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:center;border-radius:18px;background:linear-gradient(135deg,#f8fbff,#eef8ff);padding:20px}.coverBig{height:100%;min-height:420px;border-radius:22px;overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,#eef1ff,#e8f9ff);display:grid;place-items:center}.coverBig img{width:100%;height:100%;object-fit:cover}
.schoolLayer{position:absolute;inset:8px;pointer-events:none}.hotspot{pointer-events:auto;position:absolute;left:calc(var(--x) * 1%);top:calc(var(--y) * 1%);transform:translate(-50%,-50%);width:18px;height:18px;border-radius:999px;background:rgba(42,91,255,.78);box-shadow:0 0 0 5px rgba(42,91,255,.08),0 8px 20px rgba(20,40,80,.18);border:2px solid rgba(255,255,255,.95);cursor:pointer;opacity:.28;transition:.18s opacity,.18s transform,.18s box-shadow}.hotspot:after{content:"";position:absolute;inset:5px;border-radius:50%;background:white}.bookPage:hover .hotspot,.hotspot:hover,.hotspot:focus,.hotspot.selected{opacity:1;transform:translate(-50%,-50%) scale(1.12);box-shadow:0 0 0 8px rgba(42,91,255,.14),0 12px 28px rgba(20,40,80,.24)}.hotspot.adminDot{cursor:grab}.hotspot.adminDot:active{cursor:grabbing}.hotspotLabel{position:absolute;left:50%;top:-28px;transform:translateX(-50%);background:#152033;color:white;border-radius:999px;padding:5px 8px;white-space:nowrap;font-size:11px;font-weight:900;opacity:0;pointer-events:none}.hotspot:hover .hotspotLabel,.hotspot.selected .hotspotLabel{opacity:1}
.modal{position:fixed;inset:0;background:rgba(18,29,48,.38);backdrop-filter:blur(10px);display:grid;place-items:center;z-index:100;padding:18px}.modalBox{width:min(920px,100%);max-height:88vh;overflow:auto;border:1px solid rgba(255,255,255,.92);background:rgba(255,255,255,.97);border-radius:30px;box-shadow:0 45px 140px rgba(36,72,113,.28);padding:22px}.modalHeading{margin:0;letter-spacing:-.04em}.modalBody{line-height:1.65}.modalBody img,.modalBody video{max-width:100%;border-radius:18px;border:1px solid var(--line)}.quizSet{display:grid;gap:12px;margin:12px 0;padding:14px;border:1px solid var(--line);border-radius:18px;background:#f8fbff}.quizOption{display:block;width:100%;text-align:left;margin:8px 0;padding:12px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer}.quizOption.correct{background:#e8fff4;border-color:#62d59d}.quizOption.wrong{background:#fff0f3;border-color:#f08aa0}.videoShell{border-radius:22px;overflow:hidden;background:#050816;border:1px solid #d7e4f2;box-shadow:0 20px 60px rgba(36,72,113,.16)}.videoShell iframe,.videoShell video{display:block;width:100%;aspect-ratio:16/9;background:#000}.pdfShell{display:grid;gap:12px}.pdfShell iframe{width:100%;height:min(72vh,720px);border:1px solid var(--line);border-radius:18px;background:white}.toast{position:fixed;right:18px;bottom:18px;z-index:130;padding:14px 16px;border-radius:18px;background:#152033;color:#fff;border:1px solid rgba(255,255,255,.2);box-shadow:var(--shadow);transform:translateY(20px);opacity:0;transition:.25s}.toast.show{transform:translateY(0);opacity:1}
.adminLayout{display:grid;grid-template-columns:265px minmax(0,1fr);gap:20px}.adminSide{position:sticky;top:106px;height:calc(100vh - 130px);overflow:auto}.tabBtn{width:100%;justify-content:flex-start;margin-bottom:8px}.adminHeader{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;flex-wrap:wrap;margin-bottom:18px}.bookShelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px;margin-bottom:18px}.shelfItem{cursor:pointer;padding:14px;border-radius:20px;background:#fff;border:1px solid var(--line);box-shadow:var(--soft);transition:.18s}.shelfItem.active{border-color:#93aaff;box-shadow:0 0 0 4px rgba(89,104,255,.08),var(--soft)}.shelfItem h3{margin:8px 0 3px;font-size:16px}.studioShell{display:grid;gap:20px}.workbar{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}.lessonSelect{display:flex;gap:10px;flex-wrap:wrap}.workspace{display:grid;grid-template-columns:minmax(680px,1.4fr) minmax(430px,.6fr);gap:22px;align-items:start}.previewCard{position:sticky;top:106px}.previewTabs,.inspectorTabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.livePreview{background:linear-gradient(180deg,#f8fbff,#edf7ff);border:1px solid #d8e6f4;border-radius:28px;padding:18px;min-height:620px;display:grid;place-items:center;overflow:auto}.livePreview .bookPage{width:min(100%,1080px);box-shadow:var(--soft)}.pageManager{display:grid;gap:12px}.pageTiles{display:flex;gap:8px;overflow:auto;padding:4px 0 10px}.pageTile{border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;cursor:grab;font-weight:900}.pageTile:active{cursor:grabbing}.properties{display:grid;gap:16px}.inspectorCard{position:relative}.selectionPath{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 12px}.sectionList{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.sectionBtn{border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px 10px;cursor:grab;font-weight:900;text-align:left;min-height:60px}.sectionBtn:active{cursor:grabbing}.sectionBtn small{display:block;color:var(--muted);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:4px}.sectionActions,.pageActions{display:flex;gap:8px;flex-wrap:wrap}.uploadLine{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}.richToolbar{display:flex;flex-wrap:wrap;gap:8px;padding:10px;border:1px solid var(--line);border-bottom:0;background:#f6faff;border-radius:16px 16px 0 0;position:sticky;top:0;z-index:3}.richToolbar button{width:auto;padding:8px 12px;border-radius:11px;background:#fff;border:1px solid var(--line);font-weight:1000;cursor:pointer}.richToolbar select{width:auto;min-width:140px;padding:8px 10px;border-radius:11px}.richToolbar input[type=color]{width:48px;height:40px;padding:4px;border-radius:11px}.richArea{min-height:180px;border:1px solid var(--line);border-radius:0 0 16px 16px;background:#fff;padding:14px;outline:none;line-height:1.55}.dotList{display:grid;gap:8px}.dotRow{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;border:1px solid var(--line);border-radius:15px;background:#fff;padding:10px}.dotRow.active{background:#edf3ff;border-color:#94adff}.dotMiniMeta{font-size:12px;color:var(--muted);margin-top:2px}.quizEditorList{display:grid;gap:12px}.quizEditorCard{border:1px solid var(--line);border-radius:18px;background:#f8fbff;padding:14px}.accessMatrix{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}.checkRow{display:flex;gap:8px;align-items:center;padding:8px 0}.checkRow input{width:auto}.mediaGrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.mediaCard{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--soft)}.mediaPreview{height:132px;background:#eef6ff;display:grid;place-items:center;color:#5b6d84;font-weight:1000}.mediaPreview img,.mediaPreview video{width:100%;height:100%;object-fit:cover}.mediaBody{padding:12px;display:grid;gap:8px}.loginEditorGrid{display:grid;grid-template-columns:370px 1fr;gap:20px}.loginItemList{display:grid;gap:10px}.loginItem{border:1px solid var(--line);border-radius:16px;background:#fff;padding:12px;cursor:pointer}.loginItem.active{background:#edf3ff;border-color:#94adff}.statGrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:12px}.miniStat{padding:16px;border-radius:18px;background:#f3f9ff;border:1px solid #dbeaf7}.miniStat b{font-size:24px;display:block}.dangerZone{border-color:#ffd0da;background:#fff7f9}
@media(max-width:1320px){.workspace{grid-template-columns:1fr}.previewCard{position:static}.livePreview{min-height:auto}.adminSide{position:static;height:auto}.adminLayout{grid-template-columns:1fr}.loginEditorGrid{grid-template-columns:1fr}}
@media(max-width:880px){.grid.two,.grid.three,.readerWrap,.authShell{grid-template-columns:1fr}.readerSide,.authPanel{position:static;height:auto}.topbar{position:relative;top:0}.bookPage{aspect-ratio:1.52/1;min-height:auto}.blockGrid{grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr)}.sectionList{grid-template-columns:1fr 1fr}.coverPage{grid-template-columns:1fr}.app{padding:14px}.spread{align-items:flex-start;flex-direction:column}.cellText{font-size:9px}.hotspot{opacity:.42}}
@media(max-width:520px){.bookPage{width:100%;padding:4px}.cellText{font-size:7.5px;padding:3px}.cellImage{height:64%}.cellText{height:36%}.sectionList{grid-template-columns:1fr}.authTabs{grid-template-columns:1fr}.pageTitle{font-size:30px}.card{padding:18px}}
@media print{body{background:#fff;color:#111}.topbar,.readerSide,.readerTools,.toast,.modal,.noPrint{display:none!important}.app{width:100%;padding:0}.readerWrap{display:block}.card{box-shadow:none;border:0;background:#fff}.pageStage{display:block;min-height:0}.bookPage{width:100%;page-break-after:always;box-shadow:none;border:1px solid #111;background:#fff;color:#111;aspect-ratio:1.52/1}.pageBlock{break-inside:avoid}}

/* v4 editor refinement */
.logo.hasImage{background:#fff;padding:4px;box-shadow:0 10px 24px rgba(42,74,110,.12)}
.logo img{width:100%;height:100%;object-fit:contain;border-radius:12px;display:block}
body.sidebarHidden .adminLayout{grid-template-columns:1fr}
body.sidebarHidden .adminSide{display:none}
body.sidebarHidden .adminAppShell{width:100%;padding-left:12px;padding-right:12px}
body.sidebarHidden .workspace{grid-template-columns:minmax(760px,1.55fr) minmax(440px,.45fr)}
.bookSetupCard{padding:26px 28px}
.bookSetupGrid{display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:18px;align-items:start;margin-top:18px}
.bookSetupGrid textarea{min-height:118px}
.coverTools{display:grid;gap:12px}
.advancedWorkbar{display:grid;grid-template-columns:minmax(280px,.9fr) minmax(420px,1.3fr) auto;align-items:end;gap:18px;padding:22px 26px}
.lessonControlBlock{min-width:0}.lessonFields{display:grid;grid-template-columns:minmax(210px,1fr) minmax(330px,1fr);gap:14px;align-items:end}.lessonActions{justify-content:flex-end}.modeSwitch{display:grid;grid-template-columns:1fr 1fr;gap:10px}.modeSwitch .ghost{width:100%;padding:13px 14px}.modeEditorTitle{margin:2px 0 18px;padding-bottom:15px;border-bottom:1px solid var(--line)}
.dragDropHint{padding:12px 14px;border-radius:16px;background:linear-gradient(135deg,#eef6ff,#f6fbff);border:1px dashed #aac4e2;color:#53657d;font-weight:800;font-size:13px;line-height:1.45}.dragHandle{display:inline-flex;align-items:center;justify-content:center;margin-right:8px;padding:4px 7px;border-radius:999px;background:#eef6ff;border:1px solid #d5e5f5;color:#516177;font-size:10px;text-transform:uppercase;letter-spacing:.08em}.sectionBtn,.pageTile,.loginItem{position:relative}.sectionBtn.dragging,.pageTile.dragging,.loginItem.dragging{opacity:.48;transform:scale(.98)}.sectionBtn.dragOver,.pageTile.dragOver,.loginItem.dragOver{border-color:#5968ff;background:#eef3ff;box-shadow:0 0 0 4px rgba(89,104,255,.12)}
.adminPreviewPage.dropGlow{outline:4px dashed rgba(89,104,255,.36);outline-offset:8px}.adminPreviewPage .hotspot{width:16px;height:16px;opacity:.22}.adminPreviewPage:hover .hotspot,.adminPreviewPage .hotspot:hover,.adminPreviewPage .hotspot.selected{opacity:.95}.adminPreviewPage .hotspot.selected{box-shadow:0 0 0 9px rgba(89,104,255,.18),0 12px 28px rgba(42,74,110,.22)}
.nextRichToolbar{display:grid;gap:10px;background:linear-gradient(180deg,#f9fcff,#eff7ff);padding:12px;border-radius:18px 18px 0 0}.toolbarGroup{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px;border-radius:14px;background:rgba(255,255,255,.82);border:1px solid #dbe8f5}.toolbarGroup span{font-size:12px;text-transform:uppercase;letter-spacing:.07em;font-weight:1000;color:#5b6a80}.nextRichToolbar button{padding:9px 12px;border-radius:12px}.nextRichToolbar select{min-width:130px}.colorGroup input[type=color]{width:44px;height:38px}.richArea{min-height:240px;font-size:16px;line-height:1.6}.dotOnlyForm{background:linear-gradient(180deg,#fff,#f8fbff)}
.adminSide{padding:22px}.tabBtn{padding:13px 15px;margin-bottom:10px}.previewCard{padding:26px}.inspectorCard{padding:26px}.livePreview{padding:24px;min-height:680px}.workspace{gap:26px}.properties{min-width:0}.uploadLine{gap:10px}.uploadLine input{min-width:0}.loginEditorGrid{grid-template-columns:minmax(330px,390px) minmax(0,1fr)}
@media(max-width:1480px){.advancedWorkbar{grid-template-columns:1fr}.lessonFields{grid-template-columns:1fr 1fr}.workspace,body.sidebarHidden .workspace{grid-template-columns:1fr}.previewCard{position:static}.bookSetupGrid{grid-template-columns:1fr 1fr}.coverTools{grid-column:1 / -1}}
@media(max-width:760px){.bookSetupGrid,.lessonFields,.modeSwitch{grid-template-columns:1fr}.advancedWorkbar{padding:18px}.topbar{border-radius:22px}.nav{width:100%;justify-content:flex-start}.livePreview{padding:10px;min-height:auto}.previewCard,.inspectorCard,.bookSetupCard{padding:18px}.authShell.cleanAuth{grid-template-columns:1fr}.publicTopbar .brand small{display:none}}