@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');
:root{font-family:'Noto Sans KR',-apple-system,BlinkMacSystemFont,sans-serif;color:#25322e;background:#f6f7f5;font-synthesis:none;--green:#164b43;--ink:#25322e;--muted:#77837d;--line:#e3e8e2;--paper:#fff;--soft:#f2f5f1;--accent:#d9e9dc}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #8cae9f;outline-offset:3px}button{border:0;background:none;color:inherit}svg{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}h1,h2,h3,p{margin:0}h1{font-size:30px;letter-spacing:-1.1px;font-weight:700}h2{font-size:19px;letter-spacing:-.45px;font-weight:600}h3{font-size:16px;font-weight:600}input,select,textarea{border:1px solid #dce2dc;background:white;border-radius:9px;padding:10px 12px;color:var(--ink);min-width:0}input[type=checkbox]{accent-color:var(--green);width:16px;height:16px}label{font-size:13px;color:#536259}small{font-size:12px}.muted{color:var(--muted)}.eyebrow{font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:#6b8376}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:9px 15px;border-radius:9px;font-size:13px;font-weight:500;background:white;border:1px solid var(--line);white-space:nowrap}.btn.primary{background:var(--green);color:white;border-color:var(--green)}.btn.quiet{background:transparent;border-color:transparent;color:#63736b}.btn.danger{color:#ac493e}.btn.small{font-size:12px;padding:6px 10px;min-height:33px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px}.icon-btn:hover{background:#eaf0e9}.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.spacer{flex:1}.tag{display:inline-flex;align-items:center;gap:5px;border-radius:5px;padding:4px 7px;background:#f1f5ef;color:#4f6d59;font-size:11px;font-weight:500}.tag.warn{background:#faf1dc;color:#896b27}.tag.gray{background:#f1f2f0;color:#89918b}.tag.teal{background:#e7f2ee;color:#2d7665}.dot{width:6px;height:6px;background:#5b9070;border-radius:50%}.boot{min-height:70vh;display:flex;gap:16px;align-items:center;justify-content:center;color:var(--muted)}.spinner{display:inline-block;width:18px;height:18px;border:2px solid #d7e2d9;border-top-color:var(--green);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.shell{display:grid;grid-template-columns:218px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:#fff;border-right:1px solid var(--line);padding:30px 18px 18px;display:flex;flex-direction:column;gap:36px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;padding:0 9px}.brand-mark{height:32px;width:32px;border-radius:9px;background:var(--green);color:white;display:grid;place-items:center;font-weight:800;font-size:22px}.brand-word{font-size:17px;font-weight:800;letter-spacing:1.1px}.brand-sub{font-size:10px;font-weight:400;color:#849086;letter-spacing:2px;margin-top:1px}.nav-label{font-size:10px;color:#99a29b;letter-spacing:1.4px;padding:0 13px;margin-bottom:12px}.nav{display:flex;flex-direction:column;gap:5px}.nav button{display:flex;align-items:center;gap:12px;text-align:left;padding:12px 13px;border-radius:8px;font-size:13px;color:#758177}.nav button.active{color:var(--green);background:#ecf2eb;font-weight:600}.sidebar-note{margin-top:auto;padding:15px 12px;background:#f6f8f4;border-radius:10px;color:#829087;font-size:11px;line-height:1.8}.sidebar-note strong{color:#56695c;font-size:12px;font-weight:500}.profile{padding:15px 9px 0;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px}.avatar{width:32px;height:32px;border-radius:50%;background:#e9efdf;display:grid;place-items:center;color:#677747;font-size:12px;font-weight:600}.profile-name{font-size:12px;font-weight:500}.profile-role{font-size:10px;color:#8a948c;margin-top:2px}.main{min-width:0}.topbar{min-height:70px;padding:0 38px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:#ffffffb5;gap:16px}.crumb{font-size:12px;color:#839087;display:flex;gap:10px;align-items:center}.crumb strong{font-weight:500;color:#41564a}.topbar .site{font-size:11px;color:#9aa39d}.content{max-width:1400px;margin:0 auto;padding:34px 38px 50px}.page-head{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:27px}.page-head p{font-size:13px;color:#839087;margin-top:9px}.overview-strip{display:flex;gap:24px;padding:18px 22px;border:1px solid var(--line);background:#fff;border-radius:12px;margin-bottom:27px;flex-wrap:wrap}.overview-item{display:flex;align-items:center;gap:10px;font-size:12px;color:#8a968d}.overview-item strong{font-size:15px;color:#435b4b;font-weight:600}.overview-item+.overview-item{border-left:1px solid #e7ebe6;padding-left:24px}.search-row{display:flex;align-items:center;gap:12px;margin-bottom:22px;flex-wrap:wrap}.searchbox{display:flex;align-items:center;gap:10px;background:white;border:1px solid var(--line);border-radius:9px;padding:0 13px;flex:1;max-width:390px;min-width:200px;color:#98a498}.searchbox input{border:0;background:transparent;padding:11px 0;width:100%;font-size:12px;outline-offset:1px}.filter-pills{display:flex;gap:5px;flex-wrap:wrap}.filter-pills button{padding:8px 12px;border-radius:7px;font-size:12px;color:#859187}.filter-pills button.active{background:#e5ede2;color:#35533c;font-weight:600}.book-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.book-card{border:1px solid var(--line);border-radius:13px;background:white;overflow:hidden}.book-top{display:grid;grid-template-columns:136px 1fr;gap:23px;padding:25px}.cover{height:190px;position:relative;border-radius:2px 8px 8px 2px;background:#e7f0ce;padding:18px 16px;color:#315d36;box-shadow:inset 5px 0 0 #3e5c2920,3px 5px 9px #22351c12;overflow:hidden}.cover:after{content:'';position:absolute;left:50px;top:73px;width:130px;height:130px;border:1px solid #75915455;border-radius:50%}.cover.rpm{background:#e2eceb;color:#2d6a70}.cover.rpm:after{border-radius:0;transform:rotate(35deg);border-color:#6e939755}.cover-label{font-size:8px;letter-spacing:1px;position:relative;z-index:1}.cover-title{font-size:27px;font-weight:800;letter-spacing:-2px;line-height:1.2;margin-top:18px;position:relative;z-index:1}.cover.rpm .cover-title{font-size:37px;letter-spacing:-1px}.cover-class{font-size:11px;margin-top:12px;position:relative;z-index:1}.cover-term{font-size:32px;font-weight:600;position:absolute;bottom:14px;right:17px;letter-spacing:-2px}.book-info{display:flex;flex-direction:column;align-items:flex-start;min-width:0}.book-info .eyebrow{font-size:9px;margin-top:4px;letter-spacing:1px}.book-info h2{margin:12px 0 4px;font-size:19px;line-height:1.5}.book-info .edition{font-size:11px;color:#98a196}.book-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto;padding-top:15px}.book-actions{border-top:1px solid #eef1ec;padding:13px 20px;display:flex;align-items:center;justify-content:space-between;gap:8px}.book-actions span{font-size:11px;color:#88968a}.book-actions button{font-size:12px;font-weight:500;color:var(--green);display:flex;align-items:center;gap:8px}.section-head{margin-top:35px;margin-bottom:17px;display:flex;align-items:center;justify-content:space-between}.section-head span{font-size:12px;color:#8b978d}.lesson-row{display:flex;align-items:center;gap:15px;padding:17px 20px;border:1px solid var(--line);border-radius:11px;background:#fff;margin-bottom:10px}.lesson-icon{width:39px;height:39px;background:#f0f4ec;border-radius:9px;color:#6a855e;display:grid;place-items:center}.lesson-name{font-size:13px;font-weight:500}.lesson-desc{font-size:11px;color:#94a08f;margin-top:4px}.empty{padding:45px 20px;text-align:center;background:#fff;border:1px dashed #dce3d8;border-radius:12px;color:#8a978b;font-size:13px;line-height:1.8}.empty svg{width:30px;height:30px;margin-bottom:8px;color:#a6b49e}.info-note{font-size:11px;color:#8a978d;line-height:1.8;margin-top:20px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px}.panel{border:1px solid var(--line);background:white;border-radius:12px;padding:20px;min-width:0}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:18px}.back{font-size:12px;color:#748778;display:inline-flex;gap:7px;align-items:center;margin-bottom:18px}.back svg{width:16px}.book-banner{display:flex;gap:13px;align-items:center}.book-badge{width:45px;height:45px;border-radius:10px;background:#e9f0d9;color:#5c7940;display:grid;place-items:center}.book-banner h1{font-size:25px}.book-banner p{font-size:12px;color:#899688;margin-top:6px}.blocks-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.block-card{border:1px solid #e2e7de;background:white;border-radius:10px;overflow:hidden;position:relative}.block-card.selected{border-color:#6a957d;box-shadow:0 0 0 1px #6a957d}.block-image{height:140px;width:100%;display:flex;align-items:center;justify-content:center;background:#fff;padding:12px;border-bottom:1px solid #edf0e9;cursor:pointer}.block-image canvas,.block-image img{max-height:100%;max-width:100%;object-fit:contain}.block-caption{padding:11px}.block-name{font-size:12px;font-weight:500}.block-sub{font-size:10px;color:#929e91;margin-top:5px;display:flex;gap:6px;align-items:center;flex-wrap:wrap}.block-controls{display:flex;gap:4px;margin-top:10px;align-items:center}.block-controls .btn{font-size:11px;padding:6px 8px;min-height:30px}.block-check{position:absolute;right:8px;top:8px;background:#fff;border:1px solid #dce5d9;width:26px;height:26px;border-radius:6px;display:grid;place-items:center}.side-stack{display:flex;flex-direction:column;gap:16px}.queue-list{display:flex;flex-direction:column;gap:8px;margin:14px 0}.queue-item{display:flex;align-items:center;gap:9px;background:#f5f7f2;border-radius:7px;padding:10px;font-size:12px}.queue-number{font-size:10px;color:#9aa78f;min-width:16px}.queue-item .name{flex:1}.queue-item button{font-size:16px;color:#a4ad9d}.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}.field input,.field select,.field textarea{width:100%;font-size:13px}.field small{font-size:11px;color:#91a08e;line-height:1.7}.fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.progress{height:6px;background:#e7eee3;border-radius:8px;overflow:hidden;margin:14px 0}.progress span{display:block;height:100%;background:#608569;width:0}.notice{background:#f6f3e7;color:#88774d;padding:12px 14px;border-radius:8px;font-size:12px;line-height:1.8;margin-bottom:18px}.file-card{display:flex;align-items:center;gap:15px;border:1px solid var(--line);border-radius:9px;padding:17px;margin-bottom:12px}.file-card h3{font-size:13px}.file-card p{font-size:11px;color:#8a9987;margin-top:5px}.file-card .file-icon{padding:12px;border-radius:10px;background:#f1f5ed;color:#70895f}.import-drop{border:1px dashed #b9cbb1;border-radius:10px;padding:30px 20px;text-align:center;background:#f9fbf6}.import-drop input{max-width:100%;font-size:12px}.split-line{border:0;border-top:1px solid var(--line);margin:20px 0}
.teacher-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:20px}.teacher-preview{aspect-ratio:16/9;background:#000;position:relative;border-radius:8px;overflow:hidden;min-width:0}.projected-image{position:absolute;left:3%;top:6%;width:55%;height:88%;display:flex;align-items:flex-start;justify-content:flex-start}.projected-image img{max-width:100%;max-height:100%;object-fit:contain;object-position:top left;display:block}.teacher-preview[data-mode=mono] img,.projection-stage[data-mode=mono] img{filter:grayscale(1) invert(1)}.teacher-preview[data-mode=invert] img,.projection-stage[data-mode=invert] img{filter:invert(1)}.teacher-preview[data-layout=top] .projected-image,.projection-stage[data-layout=top] .projected-image{top:4%;left:3%;height:45%;width:94%!important;justify-content:center}.teacher-preview[data-layout=full] .projected-image,.projection-stage[data-layout=full] .projected-image{top:4%;left:3%;height:92%;width:94%!important;justify-content:center}.teacher-preview[data-blank=true] .projected-image,.projection-stage[data-blank=true] .projected-image{visibility:hidden}.player-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:14px}.player-toolbar .btn{font-size:12px}.player-controls{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:20px}.player-controls label{display:flex;gap:8px;align-items:center;font-size:12px}.player-controls select{font-size:12px;padding:8px}.player-controls input[type=range]{width:120px;accent-color:var(--green);padding:0}.stage-info{font-size:11px;color:#8b9987;margin-top:12px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.player-queue{display:flex;flex-direction:column;gap:7px}.player-queue button{text-align:left;padding:12px;border-radius:8px;background:#f5f7f2;display:flex;gap:10px;align-items:center;font-size:12px}.player-queue button.active{background:#e4eee2;color:#315b3c}.player-queue small{font-size:10px;color:#8b9a83}.player-search{display:flex;gap:8px;margin-top:25px}.player-search input{font-size:12px;width:100%}.quick-results{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}.return-bar{background:#eaf1e4;color:#426745;padding:10px 14px;border-radius:8px;font-size:12px;margin-top:15px;display:flex;align-items:center;justify-content:space-between}.answer-drawer{position:fixed;right:0;top:0;bottom:0;width:min(530px,95vw);background:white;z-index:40;box-shadow:-10px 0 40px #233a2826;padding:22px;overflow:auto}.answer-drawer canvas{width:100%;height:auto;margin-top:18px;border:1px solid var(--line)}.answer-drawer .fields{margin-top:20px}.answer-empty{padding:40px 15px;text-align:center;color:#8e9c88;font-size:13px;line-height:1.9}.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.answer-link{padding:15px;background:#f4f7ef;border-radius:9px;margin-top:20px}.answer-link h3{font-size:13px;margin-bottom:14px}.answer-link .field{margin-bottom:10px}.answer-link p{font-size:11px;color:#83947b;line-height:1.8}.projection-body{background:#000;color:#fff;overflow:hidden}.projection-stage{position:fixed;inset:0;background:#000;overflow:hidden}.projection-wait{height:100vh;display:flex;align-items:center;justify-content:center;color:#39453c;font-size:15px}.projection-start{position:fixed;z-index:20;inset:0;background:#000;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;color:#b8c1b5}.projection-start h1{font-size:24px;color:#e4eade}.projection-start .btn{background:#20372b;color:#eaf2e6;border-color:#36513c}.projection-start p{font-size:12px;color:#69806a}.projection-offline{position:fixed;right:20px;bottom:20px;font-size:11px;color:#586652;display:none}
.modal-shade{position:fixed;inset:0;background:#1d302a66;backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;z-index:60;padding:25px}.modal{background:#fff;border-radius:15px;max-width:600px;width:100%;max-height:92vh;overflow:auto;padding:27px;box-shadow:0 20px 80px #172d2a33}.modal.wide{max-width:1020px}.modal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.modal-head h2{font-size:19px}.modal p{font-size:12px;color:#83907e;line-height:1.8}.crop-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:25px}.crop-stage{position:relative;touch-action:none;user-select:none;background:#f0f2ed;line-height:0;cursor:crosshair}.crop-stage canvas{width:100%;height:auto}.crop-box{position:absolute;border:2px solid #2c8d61;background:#4fbe7c18;pointer-events:none;box-shadow:0 0 0 1000px #10251913}.crop-frame{overflow:hidden;border:1px solid var(--line);border-radius:6px}.crop-preview{min-height:90px;border:1px solid var(--line);border-radius:6px;padding:8px;display:flex;justify-content:center;align-items:center;margin-bottom:16px}.crop-preview canvas{max-width:100%;max-height:150px}.crop-help{font-size:11px;color:#8c9983;margin-bottom:12px}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.login-shell{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:#fff}.login-story{background:#164b43;color:#edf4e9;position:relative;overflow:hidden;padding:48px;display:flex;flex-direction:column}.login-story .brand{padding:0;color:white}.login-story .brand-mark{background:#d8e7bc;color:#164b43}.login-story .brand-sub{color:#90afa0}.login-story h1{font-size:40px;font-weight:600;line-height:1.55;margin-top:auto;letter-spacing:-1.5px;position:relative;z-index:1}.login-story p{font-size:13px;line-height:1.9;color:#a3c2b1;margin-top:20px;max-width:370px}.login-story .small-footer{font-size:10px;color:#6b9883;margin-top:auto;padding-top:50px;letter-spacing:1px}.geometry{position:absolute;width:350px;height:350px;border:1px solid #5f8a7144;transform:rotate(25deg);right:-120px;top:120px}.geometry:before{content:'';position:absolute;inset:50px;border:1px solid #5f8a7144;border-radius:50%}.login-form-wrap{display:flex;align-items:center;justify-content:center;padding:40px}.login-form{width:100%;max-width:350px}.login-form h2{font-size:28px;margin:15px 0 10px;font-weight:600;letter-spacing:-1px}.login-form>p{color:#8b988c;font-size:12px;line-height:1.8;margin-bottom:31px}.login-form .field{margin-bottom:20px}.login-form .btn{width:100%;min-height:46px}.login-form .preview-btn{margin-top:13px;color:#7a8a7b;font-size:12px}.login-help{border-top:1px solid var(--line);padding-top:18px;margin-top:25px;color:#9da79a;font-size:10px;line-height:1.9}.form-error{font-size:12px;color:#ac5145;min-height:19px;margin:10px 0}.preview-banner{background:#e8efdf;color:#6b7f57;padding:8px 20px;text-align:center;font-size:11px}.preview-banner button{text-decoration:underline;margin-left:10px;font-size:11px}#toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:#253c31;color:white;padding:13px 20px;border-radius:10px;font-size:12px;box-shadow:0 7px 25px #1f34262b;z-index:100;opacity:0;pointer-events:none;transition:.2s;max-width:90vw}#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}#toast.error{background:#805144}.loading-line{display:flex;align-items:center;gap:10px;padding:25px;font-size:12px;color:#8b9883}.more{text-align:center;margin-top:20px}
@media(min-width:1500px){.content{padding-top:45px}.book-top{grid-template-columns:155px 1fr;padding:30px}.cover{height:210px}}
@media(max-width:1150px){.sidebar{padding-left:12px;padding-right:12px}.shell{grid-template-columns:185px minmax(0,1fr)}.content{padding:28px 25px}.topbar{padding:0 25px}.book-grid{gap:15px}.book-top{grid-template-columns:105px 1fr;gap:17px;padding:20px}.cover{height:165px;padding:15px 12px}.cover-title{font-size:23px}.cover.rpm .cover-title{font-size:30px}.book-info h2{font-size:16px}.workspace{grid-template-columns:minmax(0,1fr) 250px}.blocks-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-grid{grid-template-columns:minmax(0,1fr) 230px}.teacher-grid .panel{padding:15px}.quick-results{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:900px){.shell{grid-template-columns:160px minmax(0,1fr)}.brand{padding:0 2px;gap:7px}.brand-word{font-size:13px}.brand-sub{font-size:8px}.brand-mark{width:28px;height:28px}.book-grid{grid-template-columns:1fr}.book-top{grid-template-columns:120px 1fr}.book-info h2{font-size:20px}.cover{height:175px}.workspace,.teacher-grid{grid-template-columns:1fr}.side-stack{display:grid;grid-template-columns:1fr 1fr}.player-queue{max-height:250px;overflow:auto}.crop-layout{grid-template-columns:minmax(0,1fr) 200px}.page-head{align-items:flex-start}h1{font-size:26px}.overview-strip{gap:15px}.overview-item+.overview-item{padding-left:15px}.topbar .site{display:none}.login-story{padding:35px}.login-story h1{font-size:31px}}
@media(max-width:620px){.shell{display:block}.sidebar{position:static;height:auto;flex-direction:row;align-items:center;padding:14px 16px;gap:12px;border-right:0;border-bottom:1px solid var(--line)}.sidebar .brand{flex:none}.sidebar .brand-sub,.sidebar .sidebar-note,.sidebar .profile,.sidebar .nav-label{display:none}.sidebar .brand-word{font-size:12px}.sidebar .nav{flex-direction:row;margin-left:auto;gap:3px}.sidebar .nav button{font-size:11px;padding:9px 8px;gap:5px}.sidebar .nav button svg{width:16px;height:16px}.topbar{min-height:48px;padding:0 18px}.content{padding:23px 17px}.page-head{gap:12px}.page-head .btn{font-size:11px;padding:8px 10px}.page-head p{font-size:11px;line-height:1.7}h1{font-size:24px}.book-top{padding:20px;gap:20px}.book-info h2{font-size:17px}.overview-strip{gap:10px;padding:14px}.overview-item{font-size:10px;gap:6px}.overview-item strong{font-size:13px}.overview-item+.overview-item{padding-left:10px}.side-stack{grid-template-columns:1fr}.search-row{gap:8px}.searchbox{max-width:none}.filter-pills{gap:0}.filter-pills button{font-size:11px;padding:7px 9px}.block-image{height:120px}.blocks-grid{gap:10px}.block-controls .btn{font-size:10px;padding:5px 6px}.block-name{font-size:11px}.block-caption{padding:9px}.modal-shade{padding:12px}.modal{padding:20px}.crop-layout{grid-template-columns:1fr}.crop-stage{max-width:100%}.fields{gap:10px}.login-shell{display:block}.login-story{min-height:230px;padding:27px}.login-story h1{font-size:26px;margin-top:30px}.login-story p{display:none}.login-story .small-footer{display:none}.login-form-wrap{padding:32px 26px}.login-form h2{font-size:24px}.geometry{width:200px;height:200px;top:70px;right:-50px}.row .btn{white-space:normal}.player-controls{gap:12px}.teacher-grid .panel{padding:15px}.quick-results{grid-template-columns:1fr 1fr}.panel{padding:16px}.file-card{padding:13px;gap:10px}.file-card h3{font-size:12px;overflow-wrap:anywhere}.file-card .file-icon{padding:8px}.book-banner h1{font-size:22px}.content .row input[type=number]{max-width:100px}.player-toolbar{justify-content:center}.lesson-row{padding:14px 12px;gap:10px}.lesson-row .btn{padding:6px 9px;font-size:11px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

.academy-brand{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:0 7px}.academy-logo{display:block;width:166px;max-width:100%;height:auto;object-fit:contain}.academy-brand .brand-sub{letter-spacing:1.1px;font-size:9px;padding-left:1px}.login-story .academy-logo{content:url('./brand/logo-light.png');width:220px}.login-story .academy-brand .brand-sub{color:#a9c3b5}@media(max-width:1150px){.academy-logo{width:145px}}@media(max-width:900px){.academy-logo{width:130px}.academy-brand{padding:0 2px}}@media(max-width:620px){.sidebar .academy-logo{width:111px}.sidebar .academy-brand{gap:0}.login-story .academy-logo{width:190px}}
/* Book curriculum and lesson preparation */
.book-cover{display:block;width:100%;height:200px;object-fit:contain;object-position:center;background:#f6f7fa;border-radius:4px;box-shadow:0 5px 12px #26322713}.book-mini-cover{width:42px;height:58px;object-fit:contain;border-radius:3px}.book-workspace{display:grid;grid-template-columns:205px minmax(0,1fr);gap:28px;align-items:start}.book-content{min-width:0}.chapter-nav{position:sticky;top:22px;max-height:calc(100vh - 48px);overflow:auto;padding:16px 12px;background:white;border:1px solid var(--line);border-radius:12px}.chapter-list{display:flex;flex-direction:column;gap:4px}.chapter-list h3{font-size:10px;line-height:1.6;color:#819084;padding:18px 9px 6px;letter-spacing:.2px}.chapter-list button{display:flex;gap:9px;text-align:left;align-items:baseline;padding:10px 9px;border-radius:7px;font-size:12px;line-height:1.6}.chapter-list button>span:first-child{font-size:10px;color:#9bab9e;flex:none}.chapter-list button small{display:block;font-size:10px;color:#91a191;margin-top:2px}.chapter-list button.active{background:#eaf1e6;color:#224c37;font-weight:600}.chapter-list button:hover{background:#f1f5ee}.unit-select{display:none}.unit-overview-heading{margin:8px 0 25px}.unit-overview-heading h2{font-size:22px}.unit-overview-heading p{font-size:12px;color:#849181;margin-top:9px;line-height:1.9}.chapter-section{margin-bottom:28px}.chapter-section>h3{font-size:13px;color:#687d6b;margin-bottom:12px}.unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.unit-card{display:flex;gap:14px;align-items:center;padding:21px 17px;background:#fff;border:1px solid var(--line);border-radius:11px;text-align:left;min-width:0}.unit-card:hover{border-color:#8bac95;background:#f9fbf7}.unit-card>span:nth-child(2){flex:1;min-width:0}.unit-card strong{font-size:14px;line-height:1.7;font-weight:600}.unit-card small{display:block;font-size:11px;color:#91a08e;margin-top:7px}.unit-card svg{width:16px;color:#8da38e}.unit-number{display:grid;place-items:center;flex:none;width:32px;height:38px;background:#eff4e8;color:#72906d;border-radius:7px;font-size:12px}.unit-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:25px 0 20px}.unit-heading h2{font-size:23px;margin-top:7px;line-height:1.6}.unit-heading p{font-size:11px;color:#8b9a86;margin-top:6px}.study-tabs{display:flex;gap:4px;border-bottom:1px solid #dfe5dd;margin:0 0 18px;overflow:auto}.study-tabs button{font-size:13px;padding:12px 15px;white-space:nowrap;color:#889886;border-bottom:2px solid transparent}.study-tabs button.active{color:#164b43;border-bottom-color:#164b43;font-weight:600}.type-subtabs{margin-bottom:21px}.page-group{margin-bottom:26px}.page-group-head{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #e4e9e0;padding-top:16px;margin-bottom:11px}.page-group-head h3{font-size:13px;color:#698067}.page-group-head svg{width:14px}.lesson-tray{position:sticky;bottom:15px;z-index:15;background:#fffefa;box-shadow:0 7px 30px #21372b17;border:1px solid #d4dfd0;border-radius:12px;padding:14px 20px;margin-top:30px;display:flex;align-items:center;justify-content:space-between;gap:14px}.lesson-tray details{min-width:0;flex:1}.lesson-tray summary{cursor:pointer;font-size:13px;line-height:1.8}.lesson-tray summary strong{color:#164b43;margin-left:7px}.lesson-tray summary>span{font-size:10px;color:#91a08c;margin-left:12px}.lesson-tray .queue-list{max-height:260px;overflow:auto}.lesson-tray:has(details[open]){align-items:flex-start}.block-name{line-height:1.7;overflow-wrap:anywhere}.block-image>div{display:flex;width:100%;height:100%;justify-content:center;align-items:center}.block-card .block-image img{max-width:100%;max-height:100%;object-fit:contain}.blocks-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.block-check{width:30px;height:30px}.block-check svg{width:16px;height:16px}
/* Complete-image fitting, split screens, and independent enlarged diagrams */
.teacher-grid{grid-template-columns:minmax(0,1fr) 225px;align-items:start}.lesson-outline{position:sticky;top:20px}.player-queue{max-height:65vh;overflow:auto}.player-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:20px}.player-heading .back{margin:0}.teacher-preview{aspect-ratio:16/9}.projected-image,.projected-detail{position:absolute;left:3%;top:5%;width:55%;height:90%;min-width:0;min-height:0;display:block;overflow:visible}.projected-image img,.projected-detail img{display:block;width:100%;height:100%;min-width:0;min-height:0;max-width:100%;max-height:100%;object-fit:contain;object-position:top left}.projected-detail{display:none}.teacher-preview[data-layout=top] .projected-image,.projection-stage[data-layout=top] .projected-image{height:47%;top:4%;left:3%;width:94%!important}.teacher-preview[data-layout=full] .projected-image,.projection-stage[data-layout=full] .projected-image{height:92%;top:4%;left:3%;width:94%!important}.teacher-preview[data-detail=true] .projected-image,.projection-stage[data-detail=true] .projected-image{top:4%;height:44%}.teacher-preview[data-detail=true] .projected-detail,.projection-stage[data-detail=true] .projected-detail{display:block;top:54%;height:42%;left:3%}.teacher-preview[data-layout=full][data-detail=true] .projected-detail,.projection-stage[data-layout=full][data-detail=true] .projected-detail,.teacher-preview[data-layout=top][data-detail=true] .projected-detail,.projection-stage[data-layout=top][data-detail=true] .projected-detail{width:94%!important}.teacher-preview[data-blank=true] .projected-detail,.projection-stage[data-blank=true] .projected-detail{visibility:hidden}.screen-progress{font-size:12px;font-weight:600;color:#4f6e55}.panel-dots{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:7px;margin-top:12px}.panel-dots:empty{display:none}.panel-dots button{border:1px solid #dce5d6;border-radius:6px;padding:4px 10px;font-size:11px}.panel-dots button.active{background:#164b43;color:white;border-color:#164b43}.panel-dots small{font-size:10px;color:#8da087;margin-left:7px}.presentation-tools{display:flex;gap:7px;flex-wrap:wrap;padding:16px 0;border-bottom:1px solid #edf0e8}.presentation-tools .btn{font-size:11px}.presentation-tools svg{width:15px;height:15px}.player-controls{gap:12px;margin-top:16px}.player-controls label{font-size:11px}.player-controls select{font-size:11px}.player-controls input[type=range]{width:90px}.quick-search-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #edf0e8;margin-top:23px;padding-top:20px}.quick-search-heading h3{font-size:13px}.quick-search-heading select{font-size:11px;max-width:180px;padding:6px}.player-search{margin-top:12px}.visual-editor{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:24px}.editor-scroll{max-height:62vh;overflow:auto;border:1px solid #e0e6db;border-radius:7px;padding:10px;background:#f5f7f2;min-width:0}.split-stage,.focus-stage{position:relative;line-height:0;background:white;overflow:hidden}.split-stage>img,.focus-stage>img{width:100%;height:auto;display:block;user-select:none;pointer-events:none}.split-rule{position:absolute;left:0;right:0;border-top:2px dashed #e08a3d;pointer-events:none}.split-rule span{position:absolute;right:0;top:-20px;font-size:10px;line-height:20px;padding:0 7px;background:#fce6c8;color:#925b21;border-radius:3px}.focus-stage{touch-action:none}.focus-preview{height:190px;background:#f7f9f4;border:1px solid var(--line);border-radius:7px;display:flex;align-items:center;justify-content:center;padding:10px;margin:15px 0}.focus-preview img{max-width:100%;max-height:100%;object-fit:contain}.focus-stage .crop-box{box-shadow:0 0 0 1500px #10251928}.visual-editor input[type=range]{width:100%;padding:0;accent-color:#164b43}.visual-editor .field{margin-bottom:18px}.teaching-panel .panel-head{flex-wrap:wrap}.teaching-panel .panel-head .btn{font-size:11px}
@media(min-width:1450px){body:has(>#answer-drawer) .shell{padding-right:470px}body:has(>#answer-drawer) .teacher-grid{grid-template-columns:1fr}body:has(>#answer-drawer) .lesson-outline{position:static}body:has(>#answer-drawer) .player-queue{max-height:170px}body:has(>#answer-drawer) .answer-drawer{width:470px}}
@media(max-width:1200px){.book-workspace{grid-template-columns:175px minmax(0,1fr);gap:18px}.teacher-grid{grid-template-columns:1fr}.lesson-outline{position:static}.lesson-outline .player-queue{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));max-height:220px}.book-content .blocks-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.unit-grid{grid-template-columns:1fr}.book-cover{height:175px}}
@media(max-width:800px){.book-workspace{grid-template-columns:1fr}.chapter-nav{position:static;max-height:none;padding:12px}.chapter-list{display:none}.unit-select{display:block}.unit-select .field{margin:0}.unit-heading h2{font-size:20px}.unit-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.unit-card{padding:16px 12px;gap:10px}.unit-number{width:25px;height:32px}.unit-card strong{font-size:12px}.unit-card svg{display:none}.lesson-tray{padding:12px;bottom:8px;gap:10px}.visual-editor{grid-template-columns:1fr}.editor-scroll{max-height:42vh}.focus-preview{height:140px}}
@media(max-width:620px){.book-mini-cover{width:33px;height:46px}.book-banner h1{font-size:20px}.unit-grid{grid-template-columns:1fr}.chapter-section{margin-bottom:23px}.lesson-tray{flex-wrap:wrap}.lesson-tray summary>span{display:none}.lesson-tray>.row{margin-left:auto}.lesson-tray .btn{font-size:11px;min-height:35px}.study-tabs button{font-size:11px;padding:11px 12px}.teacher-grid .teaching-panel{padding:10px}.player-heading .btn{font-size:11px;padding:7px 9px}.player-heading{align-items:flex-start}.player-heading .back{white-space:nowrap;padding-top:9px}.player-controls{gap:9px}.player-controls input[type=range]{width:75px}.player-toolbar .btn{font-size:11px;padding:7px 11px}.player-toolbar{justify-content:space-between}.screen-progress{font-size:10px}.lesson-outline .player-queue{grid-template-columns:1fr}.quick-search-heading{align-items:flex-start}.quick-search-heading select{max-width:150px}.presentation-tools .btn{font-size:10px;gap:5px;padding:6px 8px}.unit-heading{flex-wrap:wrap}.book-cover{height:175px}}