.class-context{display:flex;align-items:center;gap:12px;padding:12px 40px;border-bottom:1px solid var(--border);background:#f0f4fc;font-size:12px}
.class-context label{color:var(--muted);flex:none}
.class-context select{max-width:390px;min-width:0;flex:1;border:1px solid #cfd9ec;border-radius:7px;padding:7px 10px;background:#fff;color:var(--ink);font-size:13px}
.class-context .text-link{margin-left:auto;white-space:nowrap}
.book-tabs{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 26px}
.book-tabs button{min-width:56px;min-height:43px;padding:9px 16px;border:1px solid var(--border);border-radius:8px;background:#fff;font-size:14px;font-weight:800;color:#50627e}
.book-tabs button:hover{border-color:var(--blue);color:var(--blue)}
.book-tabs button.selected{background:var(--blue);border-color:var(--blue);color:white}
.library-intro{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:20px}
.library-intro h2{font-size:26px;margin:0 0 8px}
.library-intro p{margin:0;color:var(--muted);font-size:13px}
.library-search{max-width:510px;margin:22px 0}
.library-units{display:grid;gap:0;border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#fff}
.library-unit{padding:20px 22px;border-bottom:1px solid var(--border);display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:18px;align-items:center}
.library-unit:last-child{border-bottom:0}
.library-unit h3{margin:0 0 7px;font-size:16px}
.library-unit p{margin:0;color:var(--muted);font-size:12px}
.library-callout{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:23px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-top:28px}
.library-callout h2{font-size:18px;margin:0 0 6px}.library-callout p{font-size:12px;color:var(--muted);margin:0}
.assignment-tabs{max-width:600px;grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:26px}
.teacher-toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:28px}
.homework-card{border-color:#d7dfec}.homework-card .card-lesson{color:#6a5293}.homework-card p{white-space:pre-line}
.class-create{display:flex;align-items:flex-end;gap:15px}.class-create .field{margin-bottom:0;flex:1}.class-create .btn{flex:none;min-height:45px}
.class-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.class-card{display:flex;flex-direction:column;align-items:flex-start;padding:23px;border:1px solid var(--border);border-radius:12px;background:#fff}
.class-card.selected{background:var(--blue-soft);border-color:#b6c7f6}.class-card h2{font-size:18px;margin:0 0 10px}.class-card p{font-size:13px;color:var(--muted);margin:0 0 12px}.class-card>.btn{margin-top:20px}
.roster-row{display:flex;gap:18px;align-items:center;justify-content:space-between;padding:18px 0;border-bottom:1px solid var(--border)}.roster-row:last-child{border-bottom:0}.roster-row>div{min-width:0}.roster-row strong{overflow-wrap:anywhere}.roster-row p{margin:4px 0 0}
.roster-controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.roster-controls select{max-width:230px;border:1px solid #ccd6e6;background:#fff;border-radius:7px;padding:9px;font-size:12px}
.pending-files{display:grid;gap:9px;margin-top:14px}.pending-file{display:flex;align-items:center;justify-content:space-between;gap:15px;background:#f4f7fc;padding:12px 15px;border-radius:8px;overflow-wrap:anywhere}.pending-file>span{min-width:0;font-size:13px}.pending-file small{display:block;color:var(--muted);font-size:12px;margin-top:3px}.pending-file button{flex:none}
.pending-file{flex-wrap:wrap}.pending-file>span{flex:1}.pending-media{flex-basis:100%;min-width:0}.pending-media audio{width:100%;max-width:500px}.pending-media img{display:block;max-height:130px;max-width:100%;border-radius:7px;object-fit:contain}
.attachment-list{display:grid;gap:12px;margin-top:22px}.attachment{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px 16px;padding:15px;border:1px solid var(--border);border-radius:9px}.attachment strong{display:block;font-size:13px;overflow-wrap:anywhere}.attachment .help{display:block;margin-top:4px}.attachment-preview{grid-column:1/-1;min-width:0;padding-top:8px}.attachment-preview img{display:block;max-width:100%;max-height:420px;border-radius:8px;object-fit:contain;margin-bottom:12px}.attachment-preview audio{width:100%;max-width:550px;margin-bottom:12px}.attachment-preview a{overflow-wrap:anywhere}
.preserve-lines{white-space:pre-wrap;overflow-wrap:anywhere}.submission-text{padding:18px 0;max-width:80ch}.submission-card{margin-top:16px}.submission-card h3{margin:0}
.review-form{border-top:1px solid var(--border);padding-top:22px;margin-top:22px}.review-score{display:flex;align-items:flex-end;gap:16px}.review-score .field{max-width:240px;margin-bottom:0}.review-score button{min-height:45px}
.teacher-feedback{background:#edf7f1;padding:20px;border-radius:9px;margin:0 0 24px}.teacher-feedback h3{margin:0 0 10px;font-size:16px}.teacher-feedback p{margin:0;font-size:14px}
.record-controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:16px 0}summary{cursor:pointer;font-weight:700;color:#405578}summary:focus-visible{outline:3px solid #5576ed;outline-offset:4px}.archived-homework{border-top:1px solid var(--border);padding-top:20px}
#homework-editor .pane-flex{align-items:start}#homework-editor>.actions{border-top:1px solid var(--border);padding-top:24px}.library-unit[hidden],.vocab[hidden]{display:none!important}
@media(max-width:1100px){.class-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.roster-row{align-items:flex-start;flex-direction:column}.roster-controls{justify-content:flex-start;width:100%}.class-context{padding:12px 28px}}
@media(max-width:760px){.class-context{padding:10px 20px;gap:9px;flex-wrap:wrap}.class-context label{font-size:12px}.class-context select{font-size:13px;max-width:100%;flex-basis:55%}.class-context .text-link{font-size:12px}.book-tabs{gap:6px}.book-tabs button{min-width:49px;padding:8px 12px}.library-intro{flex-direction:column;align-items:flex-start;gap:12px}.library-unit{gap:13px;padding:17px 16px}.library-unit h3{font-size:14px}.library-unit p{font-size:12px}.library-unit .btn{font-size:12px}.library-callout{align-items:flex-start;flex-direction:column;gap:14px}.teacher-toolbar .btn{font-size:12px}.assignment-tabs button{font-size:12px;padding:10px 5px}.class-create{flex-direction:column;align-items:stretch}.class-card{padding:20px}.class-card h2{font-size:17px}.roster-controls select{max-width:100%;width:100%;font-size:14px}.attachment{padding:13px;gap:12px}.attachment>.btn{padding:7px 10px;font-size:12px}.review-score{flex-wrap:wrap}.review-score .field{flex:1;min-width:180px}.pending-file{padding:12px}.panel .notice{font-size:12px}}
@media(max-width:480px){.class-grid{grid-template-columns:1fr}.library-unit{grid-template-columns:43px minmax(0,1fr)}.library-unit>.btn{grid-column:2;justify-self:start}.library-unit .lesson-index{width:43px}.class-context .text-link{margin-left:0}.teacher-toolbar .btn{width:100%}.attachment{grid-template-columns:1fr}.attachment>.btn{justify-self:start}.class-context label{display:none}}

.app-dialog{width:min(480px,calc(100vw - 32px));padding:26px;border:1px solid var(--border);border-radius:14px;color:var(--ink);background:#fff;box-shadow:0 18px 55px #172c6333}.app-dialog::backdrop{background:#17243e66}.app-dialog h2{margin:0 0 14px;font-size:22px}.app-dialog p{font-size:14px;line-height:1.7;margin-bottom:24px}.app-dialog .actions{justify-content:flex-end}.sidebar{overflow-y:auto}