.courseos-workbench{position:fixed;inset:0;z-index:2600;display:none;background:#0b1115;color:#e8f0ee;font-family:"Noto Sans SC","PingFang SC",sans-serif}
.courseos-workbench.open{display:flex;flex-direction:column}
.courseos-workbench *{box-sizing:border-box}
.courseos-workbench button,.courseos-workbench input,.courseos-workbench textarea,.courseos-workbench select{font:inherit}
.courseos-wb-topbar{height:66px;flex:none;display:flex;align-items:center;gap:18px;padding:0 22px;background:#101a1f;border-bottom:1px solid #26373b}
.courseos-wb-brand{display:flex;align-items:center;gap:9px;flex:none;color:#fff;font-weight:800;font-size:14px}
.courseos-wb-mark{width:28px;height:28px;display:grid;place-items:center;border-radius:8px;background:#d8f0e7;color:#12211f;font-size:12px}
.courseos-wb-context{min-width:0;display:flex;align-items:center;gap:9px;color:#a6b8b5;font-size:11px}
.courseos-wb-context strong{max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#f3f8f6;font-size:12px}
.courseos-wb-divider{width:1px;height:20px;background:#34474a}
.courseos-wb-live{display:inline-flex;align-items:center;gap:6px;color:#9ce1c9;background:#193b36;border:1px solid #2b6257;border-radius:999px;padding:5px 9px;font-size:9px;white-space:nowrap}
.courseos-wb-live i{width:6px;height:6px;border-radius:50%;background:#70d8b3;box-shadow:0 0 0 3px #70d8b322}
.courseos-wb-top-actions{display:flex;align-items:center;gap:7px;margin-left:auto}
.courseos-wb-button{border:1px solid #34464a;border-radius:7px;background:#17252a;color:#c5d3d0;padding:8px 11px;cursor:pointer;font-size:10px;white-space:nowrap}
.courseos-wb-button:hover{border-color:#79cbb5;color:#eafff8;background:#1c3636}
.courseos-wb-button.primary{border-color:#b6e6d6;background:#d8f0e7;color:#10231e;font-weight:800}
.courseos-wb-button.primary:hover{background:#effff8}
.courseos-wb-button.danger:hover{border-color:#d88f82;color:#ffd3c9}
.courseos-wb-button.icon{width:34px;padding:8px 0;text-align:center;font-size:14px}
.courseos-wb-layout{min-height:0;flex:1;display:grid;grid-template-columns:238px minmax(0,1fr) 315px}
.courseos-wb-rail{min-height:0;overflow:auto;background:#111c20;border-right:1px solid #26373b;padding:18px 13px}
.courseos-wb-rail-head{padding:0 8px 12px;border-bottom:1px solid #26373b;margin-bottom:10px}
.courseos-wb-rail-head small{display:block;color:#77908c;font:9px "DM Mono",monospace;letter-spacing:.08em}
.courseos-wb-rail-head b{display:block;margin-top:6px;color:#f1f7f5;font-size:13px;line-height:1.5}
.courseos-wb-progress{height:4px;background:#27383b;border-radius:4px;margin-top:11px;overflow:hidden}.courseos-wb-progress i{display:block;width:42%;height:100%;background:#7fd3b8}
.courseos-wb-nav{display:grid;gap:4px}
.courseos-wb-nav button{width:100%;display:flex;align-items:center;gap:10px;border:1px solid transparent;border-radius:8px;padding:11px 9px;text-align:left;background:transparent;color:#8fa39f;cursor:pointer}
.courseos-wb-nav button:hover{background:#17282b;color:#d6e8e2}.courseos-wb-nav button.active{background:#1b3735;border-color:#2b5e54;color:#d8f7e9}
.courseos-wb-nav button b{font-size:11px;font-weight:700}.courseos-wb-nav button small{margin-left:auto;color:#6f8984;font-size:9px}.courseos-wb-nav button.active small{color:#9adcc6}
.courseos-wb-nav-icon{width:25px;height:25px;display:grid;place-items:center;border-radius:7px;background:#1b2a2d;color:#93aaa5;font-size:11px}.active .courseos-wb-nav-icon{background:#2b6558;color:#d9fff0}
.courseos-wb-rail-section{margin-top:22px}.courseos-wb-rail-title{display:flex;justify-content:space-between;padding:0 9px 8px;color:#718682;font-size:9px;letter-spacing:.08em}.courseos-wb-rail-title button{border:0;background:none;color:#9bd6c4;cursor:pointer;font-size:10px}
.courseos-wb-checks{display:grid;gap:8px;padding:0 9px}.courseos-wb-check{display:flex;align-items:center;gap:8px;color:#91a39f;font-size:10px}.courseos-wb-check i{width:14px;height:14px;display:grid;place-items:center;border-radius:50%;border:1px solid #38504f;color:#83d0b7;font-size:9px;font-style:normal}.courseos-wb-check.done i{background:#2d685a;border-color:#2d685a;color:#d8fff2}
.courseos-wb-main{min-width:0;min-height:0;display:flex;flex-direction:column;background:#19262b}
.courseos-wb-stage-head{flex:none;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 20px;border-bottom:1px solid #2a3b3e}
.courseos-wb-stage-head>div{min-width:0}.courseos-wb-kicker{display:block;color:#83b9aa;font:9px "DM Mono",monospace;letter-spacing:.08em;text-transform:uppercase}.courseos-wb-stage-head h2{margin:5px 0 0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#f0f7f4;font-size:17px}.courseos-wb-stage-head p{margin:4px 0 0;color:#849995;font-size:10px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.courseos-wb-stage-meta{display:flex;align-items:center;gap:7px;flex:none}.courseos-wb-stage-meta span{padding:6px 8px;border:1px solid #38504e;border-radius:6px;color:#a1bcb5;font-size:9px}.courseos-wb-center{min-height:0;flex:1;display:flex;align-items:center;justify-content:center;padding:20px;background:#121b1f;overflow:auto}
.courseos-wb-player{width:min(100%,1000px);display:flex;flex-direction:column;gap:10px}.courseos-wb-canvas{position:relative;display:flex;align-items:center;justify-content:center;min-height:390px;aspect-ratio:16/9;overflow:hidden;border:1px solid #35494c;border-radius:8px;background:#071014;box-shadow:0 18px 60px #0008}.courseos-wb-canvas img{display:block;max-width:100%;max-height:100%;width:100%;height:100%;object-fit:contain}.courseos-wb-canvas video{width:100%;height:100%;object-fit:contain;background:#000}.courseos-wb-canvas audio{width:min(560px,85%)}.courseos-wb-canvas pre{width:100%;height:100%;overflow:auto;margin:0;padding:34px;color:#d6ebe4;background:#0e191c;font:12px/1.8 "DM Mono",monospace;white-space:pre-wrap}.courseos-wb-placeholder{width:100%;height:100%;display:grid;place-items:center;padding:40px;text-align:center;background:radial-gradient(circle at 70% 30%,#234d4544,transparent 30%),#0d171b}.courseos-wb-placeholder>div{max-width:470px}.courseos-wb-placeholder .big{display:block;color:#e8fff5;font-size:32px;font-weight:800;line-height:1.3}.courseos-wb-placeholder p{color:#91aaa4;font-size:12px;line-height:1.7}.courseos-wb-placeholder .eyeline{color:#7fd3b8;font:10px "DM Mono",monospace;letter-spacing:.08em}
.courseos-wb-loading{position:absolute;inset:0;display:grid;place-items:center;color:#a9c0bb;background:#081114e8;font-size:11px}.courseos-wb-loading[hidden]{display:none}
.courseos-wb-transport{display:flex;align-items:center;gap:7px;min-height:44px;padding:5px 7px;border:1px solid #2e4144;border-radius:8px;background:#18272b}.courseos-wb-transport button{border:1px solid transparent;border-radius:6px;background:transparent;color:#b7c9c4;padding:7px 9px;cursor:pointer;font-size:10px}.courseos-wb-transport button:hover:not(:disabled){background:#243d3d;color:#dffff3}.courseos-wb-transport button:disabled{opacity:.35;cursor:not-allowed}.courseos-wb-transport .page{min-width:65px;text-align:center;color:#84b6ab;font:10px "DM Mono",monospace}.courseos-wb-transport .transport-spacer{flex:1}.courseos-wb-transport .transport-hint{color:#708985;font-size:9px}
.courseos-wb-right{min-height:0;overflow:auto;background:#111c20;border-left:1px solid #26373b}.courseos-wb-tabs{display:flex;align-items:stretch;border-bottom:1px solid #26373b}.courseos-wb-tabs button{flex:1;border:0;border-bottom:2px solid transparent;background:transparent;color:#7f9691;padding:14px 5px 12px;cursor:pointer;font-size:10px}.courseos-wb-tabs button:hover{color:#d5e9e2}.courseos-wb-tabs button.active{border-bottom-color:#82d2b6;color:#d9f5e9}
.courseos-wb-panel{padding:16px 14px}.courseos-wb-panel h3{margin:0;color:#ebf6f2;font-size:13px}.courseos-wb-panel>p{margin:6px 0 14px;color:#7f9691;font-size:10px;line-height:1.6}.courseos-wb-resource-group{margin-bottom:18px}.courseos-wb-resource-group-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:7px;color:#87a39c;font-size:9px}.courseos-wb-resource-group-title span{color:#659285}.courseos-wb-resource-list{display:grid;gap:5px}.courseos-wb-resource{width:100%;display:flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:7px;background:#17272a;padding:8px;color:#a9beb8;text-align:left;cursor:pointer}.courseos-wb-resource:hover{border-color:#3d6860;background:#1c3534}.courseos-wb-resource.active{border-color:#6cbda5;background:#23443f;color:#e3fff4}.courseos-wb-resource-icon{width:26px;height:26px;display:grid;place-items:center;flex:none;border-radius:6px;background:#243a3b;color:#93d2bb;font:10px "DM Mono",monospace}.courseos-wb-resource-copy{min-width:0;flex:1}.courseos-wb-resource-copy b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:inherit;font-size:10px}.courseos-wb-resource-copy small{display:block;margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#718b85;font-size:9px}.courseos-wb-resource-status{color:#76cdb0;font-size:9px}.courseos-wb-tool-grid{display:grid;gap:7px}.courseos-wb-tool{display:flex;align-items:center;gap:10px;width:100%;border:1px solid #2d4244;border-radius:8px;background:#17272a;padding:11px;color:#bed0cb;text-align:left;cursor:pointer}.courseos-wb-tool:hover{border-color:#5eaa95;background:#1d3936}.courseos-wb-tool-icon{width:27px;height:27px;display:grid;place-items:center;border-radius:7px;background:#28423f;color:#a5e0c9}.courseos-wb-tool-copy{flex:1}.courseos-wb-tool-copy b{display:block;font-size:10px}.courseos-wb-tool-copy small{display:block;margin-top:4px;color:#718984;font-size:9px}.courseos-wb-tool-arrow{color:#72928a;font-size:14px}.courseos-wb-callout{padding:11px;border:1px solid #3b5e55;border-radius:8px;background:#18312f;color:#a8daca;font-size:10px;line-height:1.65}.courseos-wb-form{display:grid;gap:10px}.courseos-wb-form label{display:grid;gap:5px;color:#85a09a;font-size:10px}.courseos-wb-form input,.courseos-wb-form textarea,.courseos-wb-form select{width:100%;border:1px solid #33494a;border-radius:6px;background:#152326;color:#e7f4ef;padding:9px;outline:0;font-size:10px}.courseos-wb-form textarea{min-height:76px;resize:vertical}.courseos-wb-form input:focus,.courseos-wb-form textarea:focus,.courseos-wb-form select:focus{border-color:#78c9ae;box-shadow:0 0 0 2px #78c9ae2d}.courseos-wb-inline{display:flex;gap:7px}.courseos-wb-inline>*{flex:1}.courseos-wb-note-status{min-height:14px;color:#81d4b5;font-size:9px}.courseos-wb-question{border:1px solid #2f4747;border-radius:8px;background:#17272a;padding:11px;margin-bottom:8px}.courseos-wb-question small{display:block;color:#78c6ad;font-size:9px}.courseos-wb-question b{display:block;margin:7px 0 10px;color:#eaf7f2;font-size:11px;line-height:1.55}.courseos-wb-options{display:grid;gap:5px}.courseos-wb-options label{display:flex;gap:7px;align-items:flex-start;border:1px solid #2d4244;border-radius:5px;padding:7px;color:#9bb1ac;font-size:10px;cursor:pointer}.courseos-wb-options label:has(input:checked){border-color:#68b99f;background:#203b37;color:#d6f6e9}.courseos-wb-question textarea{width:100%;min-height:60px;border:1px solid #33494a;border-radius:6px;background:#142225;color:#e7f4ef;padding:8px;resize:vertical;font-size:10px}.courseos-wb-question .courseos-wb-button{margin-top:9px}.courseos-wb-result{display:block;margin-top:7px;color:#82d2b6;font-size:9px}.courseos-wb-ai-output{white-space:pre-wrap;min-height:70px;padding:10px;border:1px solid #33494a;border-radius:7px;background:#0e191c;color:#bdd5cd;font:10px/1.7 "DM Mono",monospace}
.courseos-wb-toast{position:fixed;right:24px;bottom:24px;z-index:2700;max-width:310px;border:1px solid #46796b;border-radius:8px;background:#18302e;color:#e4fff4;padding:11px 13px;box-shadow:0 16px 35px #0006;font-size:11px}.courseos-wb-toast small{display:block;margin-top:4px;color:#9bc5b7;font-size:9px}
.courseos-wb-live-results{margin-top:12px;padding:10px;border:1px solid #dfe8e3;border-radius:8px;background:#f7fbf9;color:#68777d;font-size:10px}.courseos-wb-live-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;margin-bottom:10px}.courseos-wb-live-summary span{padding:7px;border-radius:6px;background:#fff;text-align:center}.courseos-wb-live-summary b{display:block;color:#087f78;font-size:15px}.courseos-wb-live-summary small{display:block;margin-top:3px;color:#8a9698;font-size:9px}.courseos-wb-live-bars{display:grid;gap:5px}.courseos-wb-live-bars span{display:flex;align-items:center;justify-content:space-between;padding:6px 8px;border-radius:5px;background:#fff}.courseos-wb-live-bars b{color:#53656c;font-weight:500}.courseos-wb-live-bars strong{color:#087f78}.courseos-wb-question.is-live{border-color:#8fcbbb;background:#edf8f4}.courseos-wb-question.is-live .courseos-wb-result{color:#087f78}
.courseos-wb-join-code{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:11px;padding:10px;border-radius:8px;background:#e5f4ef;color:#087f78}.courseos-wb-join-code b{font-size:12px}.courseos-wb-join-code small{color:#5d8f84;font-size:9px}
.courseos-wb-overlay{position:absolute;inset:0;z-index:4;display:grid;place-items:center;padding:20px;background:#060b0dcc}.courseos-wb-overlay-card{width:min(620px,100%);max-height:90%;overflow:auto;border:1px solid #38514e;border-radius:12px;background:#142326;box-shadow:0 25px 80px #000a;padding:20px}.courseos-wb-overlay-card header{display:flex;justify-content:space-between;gap:12px;align-items:start}.courseos-wb-overlay-card header h3{margin:0;color:#edfaf4;font-size:16px}.courseos-wb-overlay-card header p{margin:5px 0 0;color:#849e97;font-size:10px}.courseos-wb-overlay-card header button{border:1px solid #3a504f;border-radius:6px;background:#1b2e31;color:#b9cfca;width:28px;height:28px;cursor:pointer}.courseos-wb-overlay-card .content{padding:15px 0 0}.courseos-wb-timer{display:flex;align-items:center;justify-content:space-between;gap:15px}.courseos-wb-timer strong{font:32px "DM Mono",monospace;color:#e9fff5}.courseos-wb-timer small{display:block;color:#86a29a;font-size:9px}.courseos-wb-sticky-note{min-height:190px;width:100%;border:1px solid #3c5653;border-radius:8px;background:#182e2e;color:#e3f6ee;padding:14px;resize:vertical;font-size:11px;line-height:1.7}.courseos-wb-brief{display:grid;gap:10px}.courseos-wb-brief div{border:1px solid #304947;border-radius:7px;background:#17292a;padding:10px}.courseos-wb-brief span{display:block;color:#78b39f;font-size:9px}.courseos-wb-brief b{display:block;margin-top:5px;color:#d7eee6;font-size:11px;line-height:1.5}
@media(max-width:1050px){.courseos-wb-layout{grid-template-columns:205px minmax(0,1fr) 275px}.courseos-wb-context{display:none}}
.courseos-wb-brief b label{display:block;margin-top:7px;color:#d7eee6;font-size:10px;font-weight:500}.courseos-wb-brief b label:first-child{margin-top:2px}.courseos-wb-brief input{accent-color:#75cbb0;margin-right:5px}
@media(max-width:780px){.courseos-wb-topbar{height:auto;min-height:58px;flex-wrap:wrap;padding:10px 13px;gap:8px}.courseos-wb-brand{font-size:12px}.courseos-wb-top-actions{margin-left:auto}.courseos-wb-top-actions .wide{display:none}.courseos-wb-layout{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto}.courseos-wb-rail{display:flex;gap:6px;overflow-x:auto;overflow-y:hidden;padding:7px 9px;border-right:0;border-bottom:1px solid #26373b}.courseos-wb-rail-head,.courseos-wb-rail-section{display:none}.courseos-wb-nav{display:flex;gap:5px}.courseos-wb-nav button{width:auto;min-width:75px;justify-content:center;padding:8px 9px;gap:6px}.courseos-wb-nav button small{display:none}.courseos-wb-nav-icon{width:20px;height:20px}.courseos-wb-right{max-height:42vh;border-left:0;border-top:1px solid #26373b}.courseos-wb-center{min-height:310px;padding:10px}.courseos-wb-canvas{min-height:210px}.courseos-wb-stage-head{padding:11px 13px}.courseos-wb-stage-meta{display:none}.courseos-wb-transport{overflow-x:auto}.courseos-wb-transport .transport-hint{display:none}}

/* Keep the classroom product in the same visual system as the rest of CourseOS. */
.courseos-workbench{
  --wb-ink:#17212b;--wb-muted:#7e8a95;--wb-line:#e6e9ec;--wb-paper:#f7f8f6;
  --wb-white:#fff;--wb-teal:#087f78;--wb-teal-soft:#dff4ef;--wb-orange:#e77b42;
  background:var(--wb-paper);color:var(--wb-ink);font-family:"Noto Sans SC","Manrope","PingFang SC",sans-serif;
}
.courseos-wb-topbar{height:72px;padding:0 28px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--wb-line);box-shadow:0 3px 16px rgba(28,48,53,.04)}
.courseos-wb-brand{color:var(--wb-ink);font-size:14px}.courseos-wb-mark{width:32px;height:32px;border-radius:10px;background:var(--wb-ink);color:#d8ffec;font-size:14px;transform:rotate(-4deg)}
.courseos-wb-context{color:var(--wb-muted)}.courseos-wb-context strong{color:var(--wb-ink)}.courseos-wb-divider{background:var(--wb-line)}
.courseos-wb-live{color:var(--wb-teal);background:#edf8f4;border-color:#cce9df}.courseos-wb-live i{background:var(--wb-teal);box-shadow:0 0 0 3px #087f7822}
.courseos-wb-button{border-color:#dfe6e2;border-radius:9px;background:var(--wb-white);color:#64737b;padding:9px 12px;box-shadow:0 2px 5px rgba(28,48,53,.03)}
.courseos-wb-button:hover{border-color:#9dcfc2;color:var(--wb-teal);background:#f4fbf8}.courseos-wb-button.primary{border-color:var(--wb-ink);background:var(--wb-ink);color:#fff}.courseos-wb-button.primary:hover{border-color:var(--wb-teal);background:var(--wb-teal);color:#fff}.courseos-wb-button.danger{color:#b25f43}.courseos-wb-button.danger:hover{border-color:#efc7b7;color:#b85c3e;background:#fff8f5}
.courseos-wb-layout{grid-template-columns:220px minmax(0,1fr) 288px;background:var(--wb-paper)}
.courseos-wb-rail{background:#fbfcfb;border-right:1px solid var(--wb-line);padding:20px 14px}.courseos-wb-rail-head{border-color:var(--wb-line)}
.courseos-wb-rail-head small{color:#a1aab0}.courseos-wb-rail-head b{color:var(--wb-ink)}.courseos-wb-progress{background:#e6efeb}.courseos-wb-progress i{background:var(--wb-teal)}
.courseos-wb-nav button{color:#657277;border-radius:10px}.courseos-wb-nav button:hover{background:#f0f7f3;color:var(--wb-teal)}.courseos-wb-nav button.active{background:var(--wb-teal-soft);border-color:#bfe4d8;color:var(--wb-teal)}
.courseos-wb-nav button small{color:#a1abae}.courseos-wb-nav button.active small{color:var(--wb-teal)}.courseos-wb-nav-icon{background:#f0f3f1;color:#77858a}.courseos-wb-nav button.active .courseos-wb-nav-icon{background:var(--wb-teal);color:#fff}
.courseos-wb-rail-section{margin-top:24px}.courseos-wb-rail-title{color:#a1aab0}.courseos-wb-rail-title button{color:var(--wb-teal)}.courseos-wb-check{color:#7e8a95}.courseos-wb-check i{border-color:#c8d9d3;color:var(--wb-teal)}.courseos-wb-check.done i{background:var(--wb-teal);border-color:var(--wb-teal);color:#fff}
.courseos-wb-main{background:#f1f3f2}.courseos-wb-stage-head{padding:17px 22px;background:var(--wb-white);border-bottom:1px solid var(--wb-line)}
.courseos-wb-kicker{color:var(--wb-teal)}.courseos-wb-stage-head h2{color:var(--wb-ink)}.courseos-wb-stage-head p{color:var(--wb-muted)}.courseos-wb-stage-meta span{border-color:#dfe8e3;color:#718087;background:#fbfdfc}
.courseos-wb-center{padding:24px;background:#f1f3f2}.courseos-wb-player{width:min(100%,1040px)}
.courseos-wb-canvas{min-height:390px;border-color:#dce5e1;border-radius:10px;background:#fff;box-shadow:0 16px 36px rgba(28,48,53,.10)}.courseos-wb-canvas video{background:#17212b}.courseos-wb-canvas pre{color:var(--wb-ink);background:#fff}.courseos-wb-placeholder{background:linear-gradient(135deg,#f9fcfb,#eef6f3);}.courseos-wb-placeholder .big{color:var(--wb-ink)}.courseos-wb-placeholder p{color:#7e8a95}.courseos-wb-placeholder .eyeline{color:var(--wb-teal)}
.courseos-wb-loading{color:#657277;background:rgba(255,255,255,.9)}
.courseos-wb-transport{border-color:var(--wb-line);border-radius:9px;background:#fff;box-shadow:0 3px 12px rgba(28,48,53,.04)}.courseos-wb-transport button{color:#64737b}.courseos-wb-transport button:hover:not(:disabled){background:#f0f7f3;color:var(--wb-teal)}.courseos-wb-transport .page{color:var(--wb-teal)}.courseos-wb-transport .transport-hint{color:#a0abad}
.courseos-wb-media-note{min-height:16px;color:#8a9698;font-size:9px;line-height:1.5;text-align:center}
.courseos-wb-embedded-media{border:1px solid var(--wb-line);border-radius:10px;background:#fbfdfc;padding:10px 12px}
.courseos-wb-player-status [data-wb-media-toggle][hidden]{display:none!important}
.courseos-wb-player-status [data-wb-media-toggle]:not([hidden]){border-color:#a7d3c4;color:var(--wb-teal);font-weight:700}
.courseos-workbench.focus-mode .courseos-wb-embedded-media.is-expanded{max-height:min(55vh,520px);overflow:auto}
.courseos-workbench.focus-mode .courseos-wb-embedded-media.is-expanded .courseos-wb-embedded-copy video{height:240px}
.courseos-wb-embedded-head{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--wb-ink);font-size:10px}
.courseos-wb-embedded-head span{color:#8a9698;font-size:9px}
.courseos-wb-embedded-list{display:grid;gap:8px;margin-top:8px}
.courseos-wb-embedded-item{display:flex;align-items:flex-start;gap:8px;padding:8px;border:1px solid #e4ebe7;border-radius:8px;background:#fff}
.courseos-wb-embedded-type{flex:none;padding:4px 6px;border-radius:5px;background:var(--wb-teal-soft);color:var(--wb-teal);font-size:9px}
.courseos-wb-embedded-copy{min-width:0;flex:1}.courseos-wb-embedded-copy>b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#64737b;font-size:9px;margin-bottom:6px}
.courseos-wb-embedded-copy audio,.courseos-wb-embedded-copy video{display:block;width:100%;max-width:520px;height:30px}.courseos-wb-embedded-copy video{height:160px;background:#17212b;border-radius:6px}.courseos-wb-embedded-copy img{display:block;max-width:100%;max-height:130px;object-fit:contain;border-radius:5px}
.courseos-wb-player:fullscreen{width:100vw;min-width:0;height:100vh;display:flex;flex-direction:column;gap:14px;padding:24px;background:#17212b}
.courseos-wb-player:fullscreen .courseos-wb-canvas{flex:1;min-height:0;aspect-ratio:auto;border-radius:8px;background:#0b1115;box-shadow:none}
.courseos-wb-player:fullscreen .courseos-wb-transport{flex:none}
.courseos-wb-player:fullscreen .courseos-wb-media-note{color:#aab8b7}
.courseos-wb-player:-webkit-full-screen{width:100vw;min-width:0;height:100vh;display:flex;flex-direction:column;gap:14px;padding:24px;background:#17212b}
.courseos-wb-player:-webkit-full-screen .courseos-wb-canvas{flex:1;min-height:0;aspect-ratio:auto;border-radius:8px;background:#0b1115;box-shadow:none}
.courseos-wb-player:-webkit-full-screen .courseos-wb-transport{flex:none}
.courseos-wb-right{background:#fff;border-left:1px solid var(--wb-line)}.courseos-wb-tabs{border-color:var(--wb-line)}.courseos-wb-tabs button{color:#8a9698}.courseos-wb-tabs button:hover{color:var(--wb-teal)}.courseos-wb-tabs button.active{border-bottom-color:var(--wb-teal);color:var(--wb-teal)}
.courseos-wb-panel h3{color:var(--wb-ink)}.courseos-wb-panel>p{color:var(--wb-muted)}.courseos-wb-resource-group-title{color:#718087}.courseos-wb-resource-group-title span{color:#a0abad}.courseos-wb-resource{border-color:#edf0ee;background:#fbfcfb;color:#64737b;border-radius:9px}.courseos-wb-resource:hover{border-color:#bfe4d8;background:#f5fbf8}.courseos-wb-resource.active{border-color:#9dcec1;background:var(--wb-teal-soft);color:var(--wb-teal)}.courseos-wb-resource-icon{background:#e8f4ef;color:var(--wb-teal)}.courseos-wb-resource-copy small{color:#9aa5a7}.courseos-wb-resource-status{color:var(--wb-teal)}
.courseos-wb-tool{border-color:#e4eae7;background:#fff;color:#596970;border-radius:10px;box-shadow:0 2px 8px rgba(28,48,53,.03)}.courseos-wb-tool:hover{border-color:#a6d4c7;background:#f6fbf9}.courseos-wb-tool-icon{background:#e8f4ef;color:var(--wb-teal)}.courseos-wb-tool-copy small{color:#8a9698}.courseos-wb-tool-arrow{color:#9aa5a7}
.courseos-wb-callout{border-color:#bfe4d8;background:#f1faf7;color:#427b6f}.courseos-wb-form label{color:#718087}.courseos-wb-form input,.courseos-wb-form textarea,.courseos-wb-form select{border-color:#dfe6e2;background:#fff;color:var(--wb-ink)}.courseos-wb-form input:focus,.courseos-wb-form textarea:focus,.courseos-wb-form select:focus{border-color:#84bdb5;box-shadow:0 0 0 3px var(--wb-teal-soft)}
.courseos-wb-note-status{color:var(--wb-teal)}.courseos-wb-question{border-color:#dfe8e3;background:#fbfcfb}.courseos-wb-question small{color:var(--wb-teal)}.courseos-wb-question b{color:var(--wb-ink)}.courseos-wb-options label{border-color:#e1e8e4;color:#68777d}.courseos-wb-options label:has(input:checked){border-color:#8fcbbb;background:var(--wb-teal-soft);color:#246d61}.courseos-wb-question textarea{border-color:#dfe6e2;background:#fff;color:var(--wb-ink)}.courseos-wb-result{color:var(--wb-teal)}.courseos-wb-ai-output{border-color:#dfe6e2;background:#fbfcfb;color:#53656c}
.courseos-wb-toast{border-color:#bfe4d8;background:#f1faf7;color:#286b5d;box-shadow:0 12px 30px rgba(28,48,53,.12)}.courseos-wb-toast small{color:#5d8f84}
.courseos-wb-overlay{background:rgba(23,33,43,.28)}.courseos-wb-overlay-card{border-color:var(--wb-line);border-radius:13px;background:#fff;box-shadow:0 22px 60px rgba(23,33,43,.18)}.courseos-wb-overlay-card header h3{color:var(--wb-ink)}.courseos-wb-overlay-card header p{color:var(--wb-muted)}.courseos-wb-overlay-card header button{border-color:#dfe6e2;background:#fff;color:#64737b}.courseos-wb-timer strong{color:var(--wb-ink)}.courseos-wb-timer small{color:var(--wb-muted)}.courseos-wb-sticky-note{border-color:#dfe6e2;background:#fff;color:var(--wb-ink)}.courseos-wb-brief div{border-color:#e1e8e4;background:#fbfcfb}.courseos-wb-brief span{color:var(--wb-teal)}.courseos-wb-brief b,.courseos-wb-brief b label{color:var(--wb-ink)}.courseos-wb-brief input{accent-color:var(--wb-teal)}
.courseos-workbench button:focus-visible,.courseos-workbench input:focus-visible,.courseos-workbench textarea:focus-visible,.courseos-workbench select:focus-visible{outline:3px solid #dff4ef;outline-offset:2px}
@media(max-width:780px){.courseos-wb-topbar{padding:10px 13px}.courseos-wb-rail{background:#fbfcfb;border-bottom-color:var(--wb-line)}.courseos-wb-right{border-top-color:var(--wb-line)}.courseos-wb-center{background:#f1f3f2}.courseos-wb-canvas{min-height:210px}}
@media(max-width:780px){
  .courseos-wb-layout{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto;min-width:0}
  .courseos-wb-rail{display:flex;gap:6px;max-width:100%;overflow-x:auto;overflow-y:hidden;padding:7px 9px;border-right:0;border-bottom:1px solid var(--wb-line)}
  .courseos-wb-rail-head,.courseos-wb-rail-section{display:none}
  .courseos-wb-nav{display:flex;gap:5px;min-width:max-content}
  .courseos-wb-nav button{width:auto;min-width:75px;justify-content:center;padding:8px 9px;gap:6px}
  .courseos-wb-nav button small{display:none}.courseos-wb-nav-icon{width:20px;height:20px}
  .courseos-wb-main{min-width:0}.courseos-wb-right{max-height:42vh;border-left:0;border-top:1px solid var(--wb-line)}
  .courseos-wb-center{min-height:310px;padding:10px}.courseos-wb-canvas{min-height:210px}
  .courseos-wb-stage-head{padding:11px 13px}.courseos-wb-stage-meta{display:none}
  .courseos-wb-transport{overflow-x:auto}.courseos-wb-transport .transport-hint{display:none}
}

/* v2 classroom surface: one active teaching stage, one primary player. */
.courseos-workbench{background:#eef1ef;color:#17212b}
.courseos-wb-topbar{height:64px;padding:0 24px}
.courseos-wb-layout{grid-template-columns:176px minmax(0,1fr) 300px}
.courseos-wb-rail{padding:16px 11px;background:#fbfcfb}
.courseos-wb-rail-head{padding:0 8px 13px;margin-bottom:11px}
.courseos-wb-rail-head b{font-size:12px}
.courseos-wb-nav{gap:3px}
.courseos-wb-nav button{min-height:48px;padding:9px 8px}
.courseos-wb-main{background:#e9edeb}
.courseos-wb-stage-head{min-height:68px;padding:12px 20px;background:#fff}
.courseos-wb-stage-head h2{font-size:16px}
.courseos-wb-center{padding:18px 20px 24px;background:#e9edeb}
.courseos-wb-player{width:min(100%,1220px);gap:9px}
.courseos-wb-player-head{min-height:28px}
.courseos-wb-player-title strong{font-size:12px}
.courseos-wb-presenter{grid-template-columns:auto minmax(0,1fr);gap:12px}
.courseos-wb-thumbnails{width:128px;max-height:calc(100vh - 222px);padding:8px;background:#f8faf9}
.courseos-wb-thumbnail-list{gap:8px}
.courseos-wb-thumbnail{padding:4px}
.courseos-wb-presenter-main{gap:8px}
.courseos-wb-canvas{border-radius:6px;background:#11191c;box-shadow:0 12px 28px rgba(26,45,49,.12)}
.courseos-wb-transport{min-height:46px}
.courseos-wb-right{background:#fff}
.courseos-wb-panel{padding:18px 16px}
.courseos-wb-panel-kicker{margin-bottom:6px;color:#087f78;font:9px "DM Mono",monospace;letter-spacing:.1em}
.courseos-wb-current-stage{display:grid;grid-template-columns:1fr auto;gap:3px 8px;margin:13px 0;padding:11px 12px;border:1px solid #cfe6dd;border-radius:8px;background:#f1faf7}
.courseos-wb-current-stage span{grid-column:1/-1;color:#7b918d;font-size:9px}
.courseos-wb-current-stage b{color:#087f78;font-size:12px}
.courseos-wb-current-stage strong{color:#087f78;font:11px "DM Mono",monospace;align-self:end}
.courseos-wb-resource-list{gap:6px}
.courseos-wb-resource{padding:10px 9px}
.courseos-wb-resource-copy b{font-size:10px}
.courseos-wb-other-title{margin:20px 0 7px;padding-top:13px;border-top:1px solid #edf1ef;color:#8a9698;font-size:9px}
.courseos-wb-stage-jumps{display:grid;gap:5px}
.courseos-wb-stage-jump{display:grid;grid-template-columns:25px 1fr auto 12px;align-items:center;gap:7px;width:100%;padding:9px;border:1px solid #edf0ee;border-radius:7px;background:#fbfcfb;color:#64737b;text-align:left;cursor:pointer}
.courseos-wb-stage-jump:hover{border-color:#bfe4d8;background:#f5fbf8;color:#087f78}
.courseos-wb-stage-jump span{display:grid;place-items:center;width:23px;height:23px;border-radius:6px;background:#eef3f1;color:#718b85;font:9px "DM Mono",monospace}
.courseos-wb-stage-jump b{font-size:10px}
.courseos-wb-stage-jump small{color:#9aa5a7;font-size:9px}
.courseos-wb-stage-jump i{color:#a0abad;font-style:normal;font-size:16px}
.courseos-wb-empty{padding:17px 10px;border:1px dashed #dfe8e3;border-radius:7px;color:#9aa5a7;text-align:center;font-size:10px}
.courseos-wb-player:fullscreen,.courseos-wb-player:-webkit-full-screen{padding:18px 22px;background:#10181c}
.courseos-wb-player:fullscreen .courseos-wb-presenter,.courseos-wb-player:-webkit-full-screen .courseos-wb-presenter{display:block}
.courseos-wb-player:fullscreen .courseos-wb-player-head,.courseos-wb-player:-webkit-full-screen .courseos-wb-player-head{display:none}
.courseos-wb-player:fullscreen .courseos-wb-thumbnails,.courseos-wb-player:-webkit-full-screen .courseos-wb-thumbnails{display:none}
.courseos-wb-player:fullscreen .courseos-wb-canvas,.courseos-wb-player:-webkit-full-screen .courseos-wb-canvas{border:0;border-radius:3px}
.courseos-wb-player:fullscreen .courseos-wb-media-note,.courseos-wb-player:-webkit-full-screen .courseos-wb-media-note,
.courseos-wb-player:fullscreen .courseos-wb-embedded-media,.courseos-wb-player:-webkit-full-screen .courseos-wb-embedded-media{display:none}

@media(max-width:1050px){
  .courseos-wb-layout{grid-template-columns:164px minmax(0,1fr) 272px}
  .courseos-wb-center{padding-left:14px;padding-right:14px}
}
@media(max-width:780px){
  .courseos-wb-layout{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto}
  .courseos-wb-topbar{min-height:92px;padding:9px 12px}
  .courseos-wb-rail{padding:6px 8px}
  .courseos-wb-stage-head{padding:10px 13px}
  .courseos-wb-center{padding:10px}
  .courseos-wb-right{max-height:38vh}
}

/* The theme pass changes the desktop header height; restore a real second row
   for the two live-class actions on narrow screens. */
@media(max-width:780px){
  .courseos-wb-topbar{height:auto;min-height:98px;flex-wrap:wrap;gap:8px;padding:10px 13px}
  .courseos-wb-top-actions{flex:0 0 100%;justify-content:flex-end;margin-left:0}
}

/* Presentation-first classroom layout. The stage stays visible while resource
   browsing and teaching tools remain available at the edges. */
.courseos-wb-layout{grid-template-columns:188px minmax(0,1fr) 268px}
.courseos-wb-main{min-width:0}
.courseos-wb-stage-head{min-height:74px;padding:13px 20px}
.courseos-wb-center{align-items:flex-start;justify-content:stretch;overflow:auto;padding:18px 22px 28px}
.courseos-wb-player{width:min(100%,1180px);margin:0 auto;gap:10px}
.courseos-wb-player-head{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:32px}
.courseos-wb-player-title{display:flex;align-items:center;gap:8px;min-width:0}
.courseos-wb-player-title strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--wb-ink);font-size:12px}
.courseos-wb-type-badge{flex:none;padding:4px 6px;border-radius:5px;background:var(--wb-teal-soft);color:var(--wb-teal);font:9px "DM Mono",monospace}
.courseos-wb-player-status{display:flex;align-items:center;gap:8px;flex:none;color:#8a9698;font-size:9px}
.courseos-wb-playback-mode{color:#087f78;font-size:9px}
.courseos-wb-mini-action{border:1px solid #dfe6e2;border-radius:6px;background:#fff;color:#64737b;padding:6px 8px;cursor:pointer;font-size:9px}
.courseos-wb-mini-action:hover:not(:disabled){border-color:#9dcfc2;color:var(--wb-teal);background:#f4fbf8}
.courseos-wb-mini-action:disabled{opacity:.4;cursor:not-allowed}
.courseos-wb-presenter{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;min-width:0}
.courseos-wb-presenter-main{min-width:0;display:flex;flex-direction:column;gap:10px}
.courseos-wb-canvas{width:100%;min-height:0;aspect-ratio:16/9}
.courseos-wb-thumbnails{width:112px;min-height:0;max-height:calc(100vh - 238px);overflow:auto;padding:7px;border:1px solid var(--wb-line);border-radius:9px;background:#fbfdfc}
.courseos-wb-thumbnails[hidden]{display:none}
.courseos-wb-thumbnails-head{display:flex;align-items:center;justify-content:space-between;padding:2px 3px 7px;color:#8a9698;font-size:9px}
.courseos-wb-thumbnails-head b{color:var(--wb-teal);font:10px "DM Mono",monospace}
.courseos-wb-thumbnail-list{display:grid;gap:7px}
.courseos-wb-thumbnail{position:relative;display:block;width:100%;padding:3px;border:1px solid #e1e8e4;border-radius:6px;background:#fff;cursor:pointer}
.courseos-wb-thumbnail:hover{border-color:#9dcfc2}
.courseos-wb-thumbnail.active{border-color:var(--wb-teal);box-shadow:0 0 0 2px var(--wb-teal-soft)}
.courseos-wb-thumbnail span{position:absolute;top:5px;left:5px;z-index:1;padding:2px 4px;border-radius:4px;background:rgba(23,33,43,.72);color:#fff;font:8px "DM Mono",monospace}
.courseos-wb-thumbnail img{display:block;width:100%;aspect-ratio:16/9;object-fit:contain;background:#f3f6f4;border-radius:4px}
.courseos-wb-page-jump{display:flex;align-items:center;gap:5px;color:#9aa5a7;font:10px "DM Mono",monospace}
.courseos-wb-page-jump input{width:39px;height:28px;border:1px solid #dfe6e2;border-radius:6px;background:#fbfdfc;color:var(--wb-teal);text-align:center;font:10px "DM Mono",monospace}
.courseos-wb-page-jump input:focus{border-color:#84bdb5;outline:2px solid var(--wb-teal-soft)}
.courseos-wb-transport{min-height:48px;padding:6px 8px}
.courseos-wb-media-note{text-align:left;padding:0 2px}
.courseos-wb-embedded-media details{border:0}
.courseos-wb-embedded-media summary{list-style:none;cursor:pointer}
.courseos-wb-embedded-media summary::-webkit-details-marker{display:none}
.courseos-wb-embedded-media summary:after{content:"+";float:right;color:var(--wb-teal);font-size:14px;line-height:10px}
.courseos-wb-embedded-media details[open] summary:after{content:"−"}

.courseos-wb-player:fullscreen,.courseos-wb-player:-webkit-full-screen{padding:20px;background:#17212b}
.courseos-wb-player:fullscreen .courseos-wb-player-title strong,
.courseos-wb-player:-webkit-full-screen .courseos-wb-player-title strong{color:#f5fbf8}
.courseos-wb-player:fullscreen .courseos-wb-player-status,
.courseos-wb-player:-webkit-full-screen .courseos-wb-player-status{color:#b7c9c4}
.courseos-wb-player:fullscreen .courseos-wb-mini-action,
.courseos-wb-player:-webkit-full-screen .courseos-wb-mini-action{border-color:#41575a;background:#203136;color:#d3e3de}
.courseos-wb-player:fullscreen .courseos-wb-presenter,
.courseos-wb-player:-webkit-full-screen .courseos-wb-presenter{flex:1;min-height:0}
.courseos-wb-player:fullscreen .courseos-wb-thumbnails,
.courseos-wb-player:-webkit-full-screen .courseos-wb-thumbnails{max-height:none;border-color:#41575a;background:#203136}
.courseos-wb-player:fullscreen .courseos-wb-presenter-main,
.courseos-wb-player:-webkit-full-screen .courseos-wb-presenter-main{min-height:0}
.courseos-wb-player:fullscreen .courseos-wb-canvas,
.courseos-wb-player:-webkit-full-screen .courseos-wb-canvas{flex:1;min-height:0}
.courseos-wb-player:fullscreen .courseos-wb-embedded-media,
.courseos-wb-player:-webkit-full-screen .courseos-wb-embedded-media{display:none}

.courseos-wb-native-host{width:100%;height:100%;min-height:0;background:#fff}
.courseos-wb-canvas>[data-wb-media]{width:100%;height:100%;min-width:0;min-height:0;display:flex;align-items:center;justify-content:center}
.courseos-wb-native-host .pptxv{width:100%;height:100%;min-height:0}
.courseos-wb-native-host .pptxv-body,
.courseos-wb-native-host .pptxv-stage-wrap{width:100%;height:100%;min-width:0;min-height:0}
.courseos-wb-native-host .pptxv-stage-wrap{min-height:0}
.courseos-wb-native-host .pptxv-stage{background:#11191c}
.courseos-wb-native-host .pptxv-notes,
.courseos-wb-native-host .pptxv-compat-toasts,
.courseos-wb-native-host .pptx-link-tooltip{display:none!important}
.courseos-wb-native-host .pptxv-stage,
.courseos-wb-native-host .pptxv-text,
.courseos-wb-native-host .pptxv-text *,
.courseos-wb-native-host .pptxv-wordart,
.courseos-wb-native-host .pptxv-wordart *,
.courseos-wb-native-host .pptxv-table-text,
.courseos-wb-native-host .pptxv-table-run,
.courseos-wb-native-host .pptxv-stage text{
  font-family:"Noto Sans SC","Microsoft YaHei","SimSun","Arial",sans-serif !important;
}
.courseos-workbench.focus-mode .courseos-wb-native-host{background:#05090b}
.courseos-workbench.focus-mode .courseos-wb-native-host .pptxv{--pptx-background:#05090b;--pptx-card:#10191d;--pptx-foreground:#e8f0ed;--pptx-muted-foreground:#9aaba7;--pptx-border:#2d4145}

@media(max-width:1050px){
  .courseos-wb-layout{grid-template-columns:176px minmax(0,1fr) 250px}
  .courseos-wb-center{padding-left:16px;padding-right:16px}
}

@media(max-width:780px){
  .courseos-wb-layout{grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto}
  .courseos-wb-center{align-items:flex-start;padding:10px}
  .courseos-wb-player-head{min-height:28px}
  .courseos-wb-player-status [data-wb-page-label]{display:none}
  .courseos-wb-presenter{display:block}
  .courseos-wb-thumbnails{display:none!important}
  .courseos-wb-canvas{aspect-ratio:16/9}
  .courseos-wb-transport{gap:3px;padding:5px}
  .courseos-wb-transport .transport-hint{display:none}
}

/* Focus mode: teaching is the primary task. Resource browsing and tools are
   still available from the single panel button in the header. */
.courseos-workbench.focus-mode{background:#0d1518;color:#edf5f2}
.courseos-workbench.focus-mode .courseos-wb-topbar{
  height:58px;
  padding:0 24px;
  gap:12px;
  background:#0d1518;
  border-bottom:1px solid #243438;
}
.courseos-workbench.focus-mode .courseos-wb-brand{gap:0}
.courseos-workbench.focus-mode .courseos-wb-brand>span:not(.courseos-wb-mark){display:none}
.courseos-workbench.focus-mode .courseos-wb-mark{
  width:30px;
  height:30px;
  border-radius:8px;
  background:#f0b37b;
  color:#1c2528;
}
.courseos-workbench.focus-mode .courseos-wb-divider,
.courseos-workbench.focus-mode .courseos-wb-live{display:none}
.courseos-workbench.focus-mode .courseos-wb-context{gap:8px}
.courseos-workbench.focus-mode .courseos-wb-context span{color:#64736e;font-size:10px}
.courseos-workbench.focus-mode .courseos-wb-context strong{max-width:360px;color:#202523;font-size:13px}
.courseos-workbench.focus-mode .courseos-wb-top-actions [data-wb-action="timer"],
.courseos-workbench.focus-mode .courseos-wb-top-actions [data-wb-action="fullscreen"]{display:none}
.courseos-workbench.focus-mode .courseos-wb-button{
  border-color:#33474b;
  border-radius:7px;
  background:#172328;
  color:#c8d7d4;
}
.courseos-workbench.focus-mode .courseos-wb-button:hover{
  border-color:#7bc9b0;
  background:#203337;
  color:#f1fff9;
}
.courseos-workbench.focus-mode .courseos-wb-button.panel-toggle{
  border-color:#5d766f;
  background:#203337;
  color:#d8efe7;
}
.courseos-workbench.focus-mode .courseos-wb-button.danger{color:#efb09b}
.courseos-workbench.focus-mode .courseos-wb-layout{
  grid-template-columns:1fr;
  grid-template-rows:minmax(0,1fr);
  background:#0d1518;
}
.courseos-workbench.focus-mode .courseos-wb-rail,
.courseos-workbench.focus-mode .courseos-wb-right{display:none}
.courseos-workbench.focus-mode .courseos-wb-main{
  background:#0d1518;
}
.courseos-workbench.focus-mode .courseos-wb-stage-head{
  min-height:42px;
  padding:8px 28px 2px;
  background:#0d1518;
  border-bottom:0;
}
.courseos-workbench.focus-mode .courseos-wb-kicker{
  color:#9ab3ac;
  font-size:9px;
}
.courseos-workbench.focus-mode .courseos-wb-stage-head h2,
.courseos-workbench.focus-mode .courseos-wb-stage-head p{display:none}
.courseos-workbench.focus-mode .courseos-wb-stage-meta{margin-left:auto}
.courseos-workbench.focus-mode .courseos-wb-stage-meta span{
  border:0;
  padding:0;
  background:transparent;
  color:#526a61;
  font-size:10px;
}
.courseos-workbench.focus-mode .courseos-wb-stage-meta span:first-child{display:none}
.courseos-workbench.focus-mode .courseos-wb-center{
  align-items:flex-start;
  justify-content:center;
  padding:4px 28px 22px;
  background:#0d1518;
  overflow:auto;
}
.courseos-workbench.focus-mode .courseos-wb-player{
  width:min(100%,1380px);
  height:100%;
  min-height:0;
  gap:8px;
}
.courseos-workbench.focus-mode .courseos-wb-player-head{
  flex:none;
  min-height:26px;
  padding:0 2px;
}
.courseos-workbench.focus-mode .courseos-wb-player-title strong{
  color:#202523;
  font-size:11px;
}
.courseos-workbench.focus-mode .courseos-wb-type-badge{
  background:#e4f0eb;
  color:#16766d;
}
.courseos-workbench.focus-mode .courseos-wb-player-status{
  color:#526a61;
}
.courseos-workbench.focus-mode .courseos-wb-playback-mode{
  color:#16766d;
}
.courseos-workbench.focus-mode .courseos-wb-mini-action{
  border-color:#dedbd2;
  background:#fffdf9;
  color:#3d4743;
}
.courseos-workbench.focus-mode .courseos-wb-presenter{
  display:flex;
  flex:1;
  min-height:0;
  flex-direction:column;
}
.courseos-workbench.focus-mode .courseos-wb-presenter-main{
  flex:1;
  min-height:0;
  gap:7px;
}
.courseos-workbench.focus-mode .courseos-wb-canvas{
  width:100%;
  flex:1;
  max-height:none;
  aspect-ratio:16/9;
  border:1px solid #2d4145;
  border-radius:5px;
  background:#05090b;
  box-shadow:0 18px 58px rgba(0,0,0,.28);
}
.courseos-workbench.focus-mode .courseos-wb-transport{
  flex:none;
  min-height:44px;
  border:1px solid #293b3f;
  border-radius:7px;
  background:#121f23;
  box-shadow:none;
}
.courseos-workbench.focus-mode .courseos-wb-transport button{
  color:#c4d3cf;
}
.courseos-workbench.focus-mode .courseos-wb-transport button:hover:not(:disabled){
  background:#203b38;
  color:#f2fff9;
}
.courseos-workbench.focus-mode .courseos-wb-page-jump input{
  border-color:#dedbd2;
  background:#fffdf9;
  color:#16766d;
}
.courseos-workbench.focus-mode .courseos-wb-transport .transport-hint{display:none}
.courseos-workbench.focus-mode .courseos-wb-media-note{display:none}
.courseos-workbench.focus-mode .courseos-wb-embedded-media{
  flex:none;
  max-height:120px;
  overflow:auto;
  margin-top:1px;
  padding:6px 9px;
  border:1px solid #293b3f;
  border-radius:7px;
  background:#121f23;
}
.courseos-workbench.focus-mode .courseos-wb-embedded-head{
  color:#c4d3cf;
  font-size:9px;
}
.courseos-workbench.focus-mode .courseos-wb-embedded-head span{color:#829793}
.courseos-workbench.focus-mode .courseos-wb-embedded-list{gap:5px;margin-top:5px}
.courseos-workbench.focus-mode .courseos-wb-embedded-item{
  padding:5px 7px;
  border-color:#2b4143;
  background:#17272a;
}
.courseos-workbench.focus-mode .courseos-wb-embedded-copy>b{color:#b9cbc7;margin-bottom:3px}
.courseos-workbench.focus-mode .courseos-wb-embedded-copy audio{height:26px}

@media(max-width:780px){
  .courseos-workbench.focus-mode .courseos-wb-topbar{
    height:56px;
    min-height:56px;
    padding:0 12px;
    flex-wrap:nowrap;
    gap:8px;
  }
  .courseos-workbench.focus-mode .courseos-wb-brand{flex:none}
  .courseos-workbench.focus-mode .courseos-wb-brand>span:last-child{display:none}
  .courseos-workbench.focus-mode .courseos-wb-context{display:flex;flex:1;min-width:0}
  .courseos-workbench.focus-mode .courseos-wb-context>span{display:none}
  .courseos-workbench.focus-mode .courseos-wb-context strong{max-width:100%;font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .courseos-workbench.focus-mode .courseos-wb-top-actions{flex:0 0 auto;margin-left:auto}
  .courseos-workbench.focus-mode .courseos-wb-top-actions .danger{display:inline-flex}
  .courseos-workbench.focus-mode .courseos-wb-top-actions .courseos-wb-button{padding:8px;font-size:10px}
  .courseos-workbench.focus-mode .courseos-wb-stage-head{padding:7px 12px 1px}
  .courseos-workbench.focus-mode .courseos-wb-center{padding:3px 9px 12px}
  .courseos-workbench.focus-mode .courseos-wb-player{gap:6px;height:auto;max-height:100%}
  .courseos-workbench.focus-mode .courseos-wb-presenter{flex:0 1 auto}
  .courseos-workbench.focus-mode .courseos-wb-presenter-main{flex:0 1 auto}
  .courseos-workbench.focus-mode .courseos-wb-canvas{flex:none;max-height:calc(100dvh - 190px);aspect-ratio:16/9}
  .courseos-workbench.focus-mode .courseos-wb-transport{overflow:visible}
  .courseos-workbench.focus-mode .courseos-wb-transport .courseos-wb-page-jump{margin-left:auto}
  .courseos-workbench.focus-mode .courseos-wb-transport [data-wb-action="autoplay"]{display:none}
}

/* Single-surface classroom layout: the player is primary and every secondary
   workflow is available from one responsive drawer. */
.courseos-workbench{
  overflow:hidden;
  background:#0d1518;
}
.courseos-workbench .courseos-wb-layout{
  grid-template-columns:1fr!important;
  min-width:0;
  background:#0d1518;
}
.courseos-workbench .courseos-wb-rail,
.courseos-workbench .courseos-wb-right{
  display:none!important;
}
.courseos-workbench .courseos-wb-main{
  min-width:0;
  background:#0d1518;
}
.courseos-workbench .courseos-wb-stage-head{
  min-height:64px;
  padding:12px 24px;
  background:#fffdf9;
  border-bottom:1px solid #dedbd2;
}
.courseos-workbench .courseos-wb-kicker{color:#16766d}
.courseos-workbench .courseos-wb-stage-head h2{color:#202523;font-size:16px}
.courseos-workbench .courseos-wb-stage-head p{color:#64736e}
.courseos-workbench .courseos-wb-stage-meta span{
  border-color:#dedbd2;
  background:#f5f3ee;
  color:#526a61;
}
.courseos-workbench .courseos-wb-center{
  align-items:flex-start;
  justify-content:stretch;
  overflow:auto;
  padding:22px 24px 30px;
  background:#0d1518;
}
.courseos-workbench .courseos-wb-player{
  width:min(100%,1220px);
  margin:0 auto;
  gap:10px;
}
.courseos-workbench .courseos-wb-player-head{
  min-height:30px;
}
.courseos-workbench .courseos-wb-player-title strong{color:#202523}
.courseos-workbench .courseos-wb-player-status{color:#526a61}
.courseos-workbench .courseos-wb-mini-action{
  border-color:#dedbd2;
  background:#fffdf9;
  color:#3d4743;
}
.courseos-workbench .courseos-wb-presenter{display:block}
.courseos-workbench .courseos-wb-thumbnails{display:none!important}
.courseos-workbench .courseos-wb-canvas{
  min-height:0;
  border-color:#2d4145;
  border-radius:7px;
  background:#05090b;
  box-shadow:0 18px 58px rgba(0,0,0,.28);
}
.courseos-workbench .courseos-wb-transport{
  min-height:46px;
  border-color:#dedbd2;
  border-radius:7px;
  background:#fffdf9;
  box-shadow:none;
}
.courseos-workbench .courseos-wb-transport button{color:#3d4743}
.courseos-workbench .courseos-wb-transport button:hover:not(:disabled){background:#e4f0eb;color:#16766d}
.courseos-workbench .courseos-wb-transport .transport-hint{display:none}
.courseos-workbench .courseos-wb-media-note,
.courseos-workbench .courseos-wb-embedded-media{
  color:#526a61;
}
.courseos-wb-drawer-layer{
  position:absolute;
  inset:64px 0 0;
  z-index:25;
  pointer-events:none;
  visibility:hidden;
}
.courseos-wb-drawer-scrim{
  position:absolute;
  inset:0;
  width:100%;
  border:0;
  background:rgba(2,8,10,.58);
  opacity:0;
  cursor:pointer;
  pointer-events:none;
  transition:opacity .18s ease;
}
.courseos-wb-drawer{
  position:absolute;
  top:0;
  right:0;
  display:flex;
  flex-direction:column;
  width:min(390px,100%);
  height:100%;
  overflow:hidden;
  background:#fff;
  color:var(--wb-ink);
  border-left:1px solid #dfe6e2;
  box-shadow:-18px 0 50px rgba(0,0,0,.2);
  transform:translateX(100%);
  transition:transform .2s ease;
  pointer-events:auto;
}
.courseos-workbench.panels-open .courseos-wb-drawer-layer{pointer-events:auto;visibility:visible}
.courseos-workbench.panels-open .courseos-wb-drawer-scrim{opacity:1;pointer-events:auto}
.courseos-workbench.panels-open .courseos-wb-drawer{transform:translateX(0)}
.courseos-wb-drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex:none;
  padding:16px 18px 13px;
  border-bottom:1px solid #e6e9ec;
}
.courseos-wb-drawer-head span{
  display:block;
  color:#087f78;
  font:9px "DM Mono",monospace;
  letter-spacing:.1em;
}
.courseos-wb-drawer-head b{display:block;margin-top:4px;font-size:16px}
.courseos-wb-drawer-close{
  width:30px;
  height:30px;
  border:1px solid #dfe6e2;
  border-radius:8px;
  background:#fff;
  color:#64737b;
  font-size:18px;
  cursor:pointer;
}
.courseos-wb-drawer-flow{
  flex:none;
  padding:14px 16px 12px;
  border-bottom:1px solid #edf1ef;
}
.courseos-wb-drawer-flow-head{
  display:flex;
  justify-content:space-between;
  gap:10px;
  margin-bottom:9px;
  color:#17212b;
  font-size:11px;
}
.courseos-wb-drawer-flow-head span{color:#8a9698;font-size:9px}
.courseos-wb-drawer .courseos-wb-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:6px;
}
.courseos-wb-drawer .courseos-wb-nav button{
  min-height:42px;
  padding:7px 8px;
  border:1px solid #e6ece9;
  border-radius:8px;
  background:#fbfcfb;
  color:#64737b;
}
.courseos-wb-drawer .courseos-wb-nav button:hover{background:#f0f7f3;color:#087f78}
.courseos-wb-drawer .courseos-wb-nav button.active{
  border-color:#9dcec1;
  background:#dff4ef;
  color:#087f78;
}
.courseos-wb-drawer .courseos-wb-nav-icon{width:22px;height:22px;background:#eef3f1;color:#718b85}
.courseos-wb-drawer .courseos-wb-nav button.active .courseos-wb-nav-icon{background:#087f78;color:#fff}
.courseos-wb-drawer .courseos-wb-nav button b{font-size:10px}
.courseos-wb-drawer .courseos-wb-nav button small{color:#9aa5a7}
.courseos-wb-drawer-checks{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin-top:9px;
}
.courseos-wb-drawer-checks span{
  padding:5px 7px;
  border-radius:5px;
  background:#f3f5f4;
  color:#9aa5a7;
  font-size:9px;
}
.courseos-wb-drawer-checks span.done{background:#edf8f4;color:#087f78}
.courseos-wb-drawer .courseos-wb-tabs{flex:none}
.courseos-wb-drawer-content{
  min-height:0;
  overflow:auto;
}
.courseos-wb-drawer-content .courseos-wb-panel{padding:16px 16px 24px}
.courseos-wb-drawer-content .courseos-wb-panel>p{max-width:320px}

@media(max-width:780px){
  .courseos-workbench .courseos-wb-stage-head{min-height:50px;padding:7px 12px 2px}
  .courseos-workbench .courseos-wb-stage-head h2{font-size:14px}
  .courseos-workbench .courseos-wb-stage-head p{display:none}
  .courseos-workbench .courseos-wb-stage-meta{display:none}
  .courseos-workbench .courseos-wb-center{min-height:0;padding:8px 9px 16px}
  .courseos-workbench .courseos-wb-player{gap:6px}
  .courseos-workbench .courseos-wb-canvas{aspect-ratio:16/9}
  .courseos-workbench .courseos-wb-button{min-height:40px;font-size:11px}
  .courseos-workbench .courseos-wb-mini-action{min-height:32px;font-size:10px}
  .courseos-workbench .courseos-wb-transport button{min-height:34px;font-size:11px}
  .courseos-workbench .courseos-wb-page-jump input{height:34px;font-size:11px}
  .courseos-wb-drawer-layer{inset:56px 0 0}
  .courseos-wb-drawer{
    top:auto;
    bottom:0;
    width:100%;
    height:min(78dvh,620px);
    border-top:1px solid #dfe6e2;
    border-left:0;
    border-radius:16px 16px 0 0;
    box-shadow:0 -18px 50px rgba(0,0,0,.2);
    transform:translateY(100%);
  }
  .courseos-wb-drawer-head{padding:12px 14px 10px}
  .courseos-wb-drawer-flow{padding:10px 12px 9px}
  .courseos-wb-drawer .courseos-wb-nav{
    display:flex;
    gap:5px;
    overflow-x:auto;
    padding-bottom:2px;
  }
  .courseos-wb-drawer .courseos-wb-nav button{
    min-width:78px;
    flex:none;
    justify-content:center;
  }
.courseos-wb-drawer .courseos-wb-nav button small{display:none}
  .courseos-wb-drawer-checks{display:none}
  .courseos-wb-drawer-content .courseos-wb-panel{padding:13px 12px 22px}
}

.courseos-wb-library-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}
.courseos-wb-library-nav button {
  display: flex;
  min-width: 0;
  min-height: 55px;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 9px;
  border: 1px solid #dfe7e3;
  border-radius: 6px;
  background: #fff;
  color: #44545b;
  text-align: left;
  cursor: pointer;
}
.courseos-wb-library-nav button.active {
  border-color: #83aafa;
  background: #edf3ff;
  color: #376bea;
}
.courseos-wb-library-nav button b { font-size: 11px; }
.courseos-wb-library-nav button small { color: #8a9698; font-size: 10px; }

.courseos-workbench .courseos-wb-player:fullscreen,
.courseos-workbench .courseos-wb-player:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  max-width: none;
  background: #10181c;
}
.courseos-workbench .courseos-wb-player:fullscreen .courseos-wb-presenter,
.courseos-workbench .courseos-wb-player:-webkit-full-screen .courseos-wb-presenter {
  display: flex;
  flex: 1;
  min-height: 0;
}
.courseos-workbench .courseos-wb-player:fullscreen .courseos-wb-presenter-main,
.courseos-workbench .courseos-wb-player:-webkit-full-screen .courseos-wb-presenter-main {
  flex: 1;
  min-height: 0;
}
.courseos-workbench .courseos-wb-player:fullscreen .courseos-wb-canvas,
.courseos-workbench .courseos-wb-player:-webkit-full-screen .courseos-wb-canvas {
  flex: 1;
  height: auto;
  max-height: none;
  aspect-ratio: auto !important;
  background: #10181c !important;
  border: 0 !important;
  box-shadow: none !important;
}