/* Classroom workspace, using the existing green palette. */
:root{--bg:#f6f8f5;--ink:#1d3027;--green:#1d7859;--line:#e3e9e3;--muted:#77867c}
body{font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;padding-bottom:100px}
button,input,select,textarea{font-family:inherit}button{touch-action:manipulation}
.shell{max-width:1600px;min-height:100vh;padding:0;display:grid;grid-template-columns:210px minmax(0,1fr)}
.app-nav{background:#fff;border-right:1px solid var(--line);padding:31px 20px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column}
.brand{text-decoration:none;color:var(--ink);margin:0 6px 43px;gap:11px;font-size:21px}.brand small{display:block;font-size:10px;font-weight:450;letter-spacing:.15px;color:var(--muted);margin-top:1px}.logo{width:40px;height:43px;border-radius:13px}
.app-nav nav{display:grid;gap:8px}.nav-item{border:0;background:none;padding:13px 15px;text-align:left;border-radius:11px;color:#65776b;display:flex;gap:13px;align-items:center;font-size:14px;cursor:pointer}.nav-item span{font-size:18px;width:20px;text-align:center}.nav-item.selected{background:var(--pale);color:var(--green);font-weight:700}.nav-item:hover{background:#f4f7f3}.nav-bottom{margin-top:auto;padding:20px 12px 70px;font-size:13px;line-height:1.8;color:#748377}.version{font-size:10px;color:#a0aaa1}
.app-main{padding:0 35px;min-width:0}.top{height:90px;margin:0;border-bottom:1px solid var(--line);gap:12px}.top>div{display:flex;gap:15px;align-items:center}.breadcrumb{color:#7c897f;font-size:12px}.connection{color:var(--green);font-size:11px;padding:4px 9px;background:#edf3ed;border-radius:6px}.header-btn{height:38px;padding:0 14px;font-size:12px}
.page-heading{margin:30px 0 23px;display:flex;align-items:center;justify-content:space-between;gap:15px}.page-heading h1{font-size:29px;letter-spacing:-1px;margin:5px 0 7px;font-weight:700}.page-heading p{font-size:13px;color:var(--muted);margin:0}.page-heading .btn{padding:0 15px;white-space:nowrap}.eyebrow{font-size:10px;letter-spacing:1.8px}.session-bar{display:flex;gap:16px;align-items:center;margin-bottom:18px}.session-bar .field{flex:1;max-width:480px;margin:0;min-width:120px}.session-bar label{font-size:11px;margin-bottom:4px}.session-bar input{height:42px;background:#fff}.language-chip{border:1px solid var(--line);border-radius:10px;background:#fff;padding:12px 14px;display:flex;gap:15px;font-size:12px;color:#476452;cursor:pointer;margin-top:20px}.session-bar .live{margin-left:auto;white-space:nowrap;font-size:11px}.workspace-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:20px;align-items:start}.card{border-radius:15px;box-shadow:0 5px 20px #1f352405}.transcript{min-height:560px;min-width:0}.cardhead{padding:19px 20px 16px}.cardhead h2{font-size:15px}.cardhead .sub{font-size:11px;margin-top:5px}.transcript-tools{display:flex;align-items:center;gap:9px;padding:12px 18px;border-bottom:1px solid #edf0ed}.transcript-tools input,.library-toolbar input{min-width:0;flex:1;height:35px;border:1px solid var(--line);border-radius:8px;background:#fafbf9;padding:0 11px;font-size:12px;outline:none}.transcript-tools select,.transcript-footer select,.library-toolbar select{height:35px;border:1px solid var(--line);border-radius:8px;color:#68776b;background:#fff;padding:0 8px;font-size:11px}.tool-btn{border:1px solid var(--line);border-radius:8px;background:white;color:#66776a;height:35px;padding:0 10px;cursor:pointer;font-size:12px}.tool-btn:hover,.tool-btn[aria-pressed=true]{background:var(--pale);color:var(--green)}
.stream{max-height:550px;min-height:355px;padding:21px;scroll-behavior:smooth}.empty{height:340px;display:grid;place-content:center;text-align:center}.empty-icon{font-size:45px;color:#a7c8b2;line-height:1;margin-bottom:19px}.empty strong{font-size:17px;font-weight:600;color:#415746}.empty p{font-size:12px;line-height:1.9;margin-top:10px}.empty-steps{display:flex;gap:17px;justify-content:center;margin-top:24px;color:#99a89c;font-size:10px}.entry{border-bottom:1px solid #edf1ed;padding:0 0 20px;margin-bottom:20px}.entrytop{justify-content:space-between;gap:9px}.entrytop>div{display:flex;gap:8px;align-items:center}.entry .en{font-size:var(--note-font,15px);line-height:1.7;color:#304a3c}.entry .zh{font-size:var(--note-font,15px);line-height:1.7;color:#708174;margin-top:7px}.entry.bookmarked{border-left:3px solid #d4af4e;padding-left:12px}.time-button{border:0;background:#f5f8f4;border-radius:5px;color:#829286;padding:3px 6px;font-size:10px;cursor:pointer;font-variant-numeric:tabular-nums}.entry-actions{display:flex;gap:9px}.entry-actions button{border:0;background:none;color:#94a598;font-size:11px;padding:4px;cursor:pointer}.entry-actions .starred{color:#b08b2d}.entry details{margin-top:9px}.entry summary{font-size:11px;color:#9aa69d;cursor:pointer}.correction-row{display:flex;gap:8px;margin-top:9px}.fix-input{min-width:0;flex:1;border:1px solid var(--line);border-radius:8px;height:34px;padding:0 9px}.correction-row .btn{height:34px;padding:0 9px;font-size:11px;white-space:nowrap}.no-results{padding:60px 20px;text-align:center;color:var(--muted);font-size:13px}
.transcript-footer{padding:13px 18px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;color:#8a9a8e;font-size:10px}.transcript-footer>div{display:flex;gap:7px;align-items:center;flex-wrap:wrap}.transcript-footer .btn{height:34px;padding:0 10px;font-size:11px}.audio-shelf{padding:14px 20px;background:#f8faf7;border-top:1px solid var(--line)}.audio-shelf>div{display:flex;justify-content:space-between;align-items:center;font-size:12px}.audio-shelf label{font-size:11px;color:var(--muted)}.audio-shelf select{border:1px solid var(--line);background:#fff;border-radius:6px;padding:4px}.audio-shelf audio{width:100%;height:38px;margin-top:10px}
.study-side{display:grid;gap:16px}.study-header{padding:19px 18px 14px;display:flex;justify-content:space-between;align-items:center}.study-header h2{font-size:15px;margin:0}.study-header .sub{font-size:10px}.study-tabs{display:flex;border-bottom:1px solid var(--line);padding:0 18px;gap:22px}.study-tabs button{border:0;border-bottom:2px solid transparent;background:none;color:#8b998e;font-size:12px;cursor:pointer;padding:10px 2px}.study-tabs button[aria-selected=true]{border-color:var(--green);color:var(--green);font-weight:700}.study-pane{padding:20px 18px;max-height:660px;overflow:auto}.assistant-intro{text-align:center;padding:16px 0 13px}.assistant-icon{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:13px;color:var(--green);background:var(--pale);font-size:24px}.assistant-intro h3{font-size:14px;font-weight:600;margin:16px 0 8px}.assistant-intro p{font-size:11px;color:var(--muted);line-height:1.9;margin:0}.consent-line{display:flex;gap:7px;align-items:start;font-size:10px;line-height:1.7;color:#8a978b;margin:13px 0}.consent-line input{margin-top:3px;accent-color:var(--green)}.study-pane>.btn{width:100%;height:40px;font-size:12px}.study-pane>.sub{text-align:center;font-size:10px;margin:10px 0 0}.sync-card{padding:15px 18px}.cloud-banner{padding:0;background:none;margin-bottom:12px;font-size:10px;gap:6px}.sync-card>.btn{width:100%;height:37px;font-size:11px}.sync-links{display:flex;justify-content:space-between;margin-top:9px;font-size:10px}.sync-card>.sub{font-size:10px;margin-top:10px}.danger{color:#b1736b}.notes-label{display:block;font-size:12px;color:#617464;margin-bottom:9px}.study-pane textarea{width:100%;height:180px;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:12px;font-size:12px;line-height:1.8;color:#3e5545;outline:none}.study-pane textarea:focus{border-color:#80af92}.small-heading{font-size:12px;font-weight:650;margin-top:22px}.bookmark-item{border-top:1px solid var(--line);padding:12px 0;font-size:12px;color:#697d6d}.bookmark-item button{border:0;background:none;color:var(--green);font-size:10px;cursor:pointer;padding:0;margin-bottom:5px}.review-empty{text-align:center;color:var(--muted);font-size:12px;padding:30px 0}.flashcard{padding:26px 17px;border:1px solid #dae7db;border-radius:13px;background:#f5faf4;text-align:center;margin-top:12px;min-height:165px;cursor:pointer;display:grid;place-items:center;width:100%;color:#385743;font-size:15px;line-height:1.7}.flashcard small{display:block;font-size:10px;color:#8a9e8e;margin-top:13px}.flashcard-nav{display:flex;justify-content:space-between;align-items:center;margin:12px 0 23px;font-size:11px;color:#7f9182}.flashcard-nav button{border:1px solid var(--line);background:white;border-radius:7px;padding:6px 12px;font-size:12px;cursor:pointer}.review-question{font-size:12px;line-height:1.8;margin:12px 0;color:#5f7564}.review-question textarea{height:65px;margin-top:8px;background:#fcfdfb;font-size:11px}
.record-dock{position:fixed;bottom:18px;left:calc(50% + 105px);transform:translateX(-50%);width:min(850px,calc(100% - 280px));padding:13px 17px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 35px #223d2d1c;display:flex;align-items:center;justify-content:space-between;gap:15px;z-index:8}.dock-stat{display:flex;gap:12px;align-items:center;font-size:11px;color:#7f8f83}.dock-stat>b{font-size:19px;color:#34533e;font-variant-numeric:tabular-nums;letter-spacing:.3px}.dock-dot{width:8px;height:8px;border-radius:50%;background:#b9c9bd}.recording .dock-dot{background:var(--red);box-shadow:0 0 0 4px #c8434310}.dock-count{border-left:1px solid var(--line);padding-left:12px}.dock-count b{font-weight:500}.dock-actions{display:flex;gap:8px}.dock-actions .btn{height:39px;padding:0 18px;font-size:12px}.quality-strip{padding:17px 0 0;font-size:10px;color:#8c9a8f;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.quality-strip>.sub{width:100%;font-size:10px}.quality-strip .text-btn{font-size:10px}.foot{font-size:10px;text-align:left;margin-top:16px;padding-bottom:23px}.toast{z-index:30;bottom:90px}.modal{z-index:40}.notes-label,.field label{font-weight:500}
.library-actions{display:flex;gap:8px}.library-toolbar{display:flex;gap:10px;margin:22px 0 13px}.library-toolbar input{height:41px;font-size:13px;background:#fff}.library-toolbar select{height:41px;font-size:12px}.lecture-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:15px;margin-top:20px}.lecture-card{padding:21px;border:1px solid var(--line);border-radius:14px;background:#fff;min-width:0}.lecture-card h3{font-size:16px;margin:14px 0 9px;overflow-wrap:anywhere;letter-spacing:-.3px}.lecture-card .sub{font-size:11px}.lecture-card .btn{width:100%;margin-top:20px;height:36px;font-size:12px}.lecture-card .row{display:flex;justify-content:space-between;align-items:center}.source-tag{padding:4px 7px;border-radius:5px;background:var(--pale);color:var(--green);font-size:10px}.lecture-card .text-btn{font-size:10px;color:#91a095}.library-note{font-size:11px;color:var(--muted);line-height:1.8;margin-top:25px}.glossary-card{padding:22px}.glossary-card form{display:flex;gap:15px;align-items:flex-end}.glossary-card .field{flex:1;min-width:0;margin-bottom:0}.glossary-card form .btn{padding:0 18px;white-space:nowrap}.glossary-card>.sub{margin:15px 0 24px}.glossary-row{display:flex;gap:20px;align-items:center;border-top:1px solid var(--line);padding:16px 3px;font-size:13px}.glossary-row strong{flex:1;color:#3f5d48;overflow-wrap:anywhere}.glossary-row span{flex:1;color:#819386;overflow-wrap:anywhere}.glossary-row button{border:0;background:none;color:#af8980;font-size:11px;cursor:pointer}
.focus-classroom .app-nav,.focus-classroom .study-side,.focus-classroom .quality-strip,.focus-classroom .foot{display:none}.focus-classroom .shell{display:block;max-width:1200px}.focus-classroom .workspace-grid{grid-template-columns:1fr}.focus-classroom .stream{max-height:65vh}.focus-classroom .record-dock{left:50%;width:min(850px,calc(100% - 40px))}
@media(min-width:1500px){.workspace-grid{grid-template-columns:minmax(0,1fr) 340px}.stream{max-height:620px}}
@media(max-width:1120px){.shell{grid-template-columns:165px minmax(0,1fr)}.app-nav{padding:25px 12px}.brand{font-size:18px}.brand small{font-size:8px}.app-main{padding:0 23px}.workspace-grid{grid-template-columns:minmax(0,1fr) 270px;gap:15px}.record-dock{left:calc(50% + 82px);width:calc(100% - 225px)}.session-bar{gap:9px}.session-bar .live{display:none}.transcript-tools{flex-wrap:wrap}.transcript-tools input{width:100%;flex-basis:100%}}
@media(max-width:920px){.workspace-grid{grid-template-columns:1fr}.study-side{grid-template-columns:1fr 1fr}.study-card{grid-column:1/-1}.study-pane{max-height:500px}.study-pane textarea{height:140px}.stream{max-height:55vh;min-height:300px}.transcript-tools{flex-wrap:nowrap}.transcript-tools input{width:auto;flex-basis:auto}.study-header{padding-bottom:5px}}
@media(max-width:640px){body{padding-bottom:110px}.shell{display:block}.app-nav{position:static;height:auto;padding:0 16px;border-right:0;border-bottom:1px solid var(--line);background:#fff}.app-nav .brand,.nav-bottom{display:none}.app-nav nav{display:flex;justify-content:space-around;gap:0}.nav-item{padding:13px 10px;font-size:12px;border-radius:0;gap:7px;flex:1;justify-content:center;border-bottom:2px solid transparent}.nav-item.selected{border-bottom-color:var(--green);background:#f9fcf8}.nav-item span{font-size:14px}.app-main{padding:0 16px}.top{height:69px}.top>div{display:block}.breadcrumb{font-size:10px;display:block;margin-bottom:2px}.connection{font-size:9px;padding:2px 5px}.header-actions{gap:7px}.header-btn{font-size:11px;padding:0 11px;height:36px}.page-heading{margin:24px 0 19px;align-items:flex-start}.page-heading h1{font-size:23px;margin:5px 0 7px}.page-heading p{font-size:11px;line-height:1.8;max-width:240px}.page-heading>.btn{font-size:11px;padding:0 10px;height:35px;margin-top:15px}.session-bar{flex-wrap:wrap;gap:10px}.session-bar .field{flex-basis:100%;max-width:none}.language-chip{margin-top:0;padding:8px 12px;font-size:11px}.session-bar .live{display:flex;font-size:10px}.cardhead{padding:16px}.cardhead h2{font-size:14px}.cardhead .sub{font-size:10px}.stream{padding:17px;min-height:300px}.empty{height:270px}.empty strong{font-size:15px}.empty p{font-size:11px}.empty-steps{font-size:9px;gap:12px}.transcript-tools{padding:11px 14px;gap:6px}.transcript-tools input{font-size:11px;padding:0 9px}.transcript-tools select{font-size:10px;max-width:94px}.tool-btn{font-size:11px;padding:0 8px}.study-side{grid-template-columns:1fr}.study-side>.note{display:none}.record-dock{bottom:10px;left:50%;width:calc(100% - 20px);padding:10px 12px;gap:9px;border-radius:13px}.dock-stat{gap:7px;font-size:9px;flex-wrap:wrap;max-width:130px}.dock-stat>b{font-size:17px}.dock-count{display:none}.dock-actions{gap:6px}.dock-actions .btn{font-size:11px;padding:0 11px;height:37px}.library-actions{flex-direction:column}.library-actions .btn{height:32px;font-size:10px;padding:0 10px}.lecture-list{grid-template-columns:1fr}.glossary-card{padding:17px}.glossary-card form{display:grid;gap:13px}.glossary-row{gap:10px;font-size:12px}.toast{bottom:85px;font-size:12px}.focus-classroom .stream{max-height:65vh}.transcript-footer{padding:12px 14px}.transcript-footer>span{width:100%}.transcript-footer>div{width:100%;justify-content:space-between}.quality-strip{font-size:9px;line-height:1.7}.modal-body .sub{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}