:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--ink:#151716;--muted:#646b67;--line:#dfe3e0;--soft:#f5f7f5;--surface:#fff;--accent:#16724a;--accent-strong:#0f5d3b;--accent-soft:#eaf5ef;--warning:#a65a00;--danger:#a33535;--sidebar-width:224px}*{box-sizing:border-box}html,body{min-height:100%}body{background:var(--surface);color:var(--ink);letter-spacing:0;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select{font:inherit;letter-spacing:0}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh}.sidebar{width:var(--sidebar-width);border-right:1px solid var(--line);z-index:10;background:#f8faf8;flex-direction:column;padding:20px 14px;display:flex;position:fixed;inset:0 auto 0 0}.brand{align-items:center;gap:10px;min-height:40px;padding:0 8px;font-size:17px;font-weight:700;display:flex}.brand-mark{background:var(--ink);color:#fff;border-radius:6px;place-items:center;width:28px;height:28px;font-size:14px;display:grid}.primary-nav{gap:4px;margin-top:28px;display:grid}.nav-link{color:#39403c;border-radius:6px;align-items:center;gap:10px;min-height:40px;padding:0 10px;font-size:14px;font-weight:550;display:flex}.nav-link:hover{background:#edf1ee}.nav-link.active{color:#18241d;background:#e4ebe7}.nav-link.muted{color:#909792;cursor:default}.nav-link.muted:hover{background:0 0}.sidebar-footer{gap:8px;margin-top:auto;display:grid}.account-summary{border-top:1px solid var(--line);min-height:46px;color:var(--muted);align-items:center;gap:10px;padding:14px 10px 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p{color:var(--muted);margin-bottom:0;font-size:13px}.empty-state{text-align:center;background:#fbfcfb;border:1px dashed #bec7c1;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;min-height:248px;margin-top:22px;padding:32px;display:flex}.empty-icon{background:var(--accent-soft);width:46px;height:46px;color:var(--accent);border-radius:8px;place-items:center;margin-bottom:16px;display:grid}.empty-state p{max-width:380px;color:var(--muted);margin-bottom:18px;font-size:14px;line-height:1.5}.text-action{color:var(--accent-strong);align-items:center;gap:6px;font-size:14px;font-weight:700;display:inline-flex}.lecture-loading{min-height:160px;color:var(--muted);justify-content:center;align-items:center;gap:9px;font-size:13px;display:flex}.lecture-error{border-left:3px solid var(--danger);color:var(--danger);background:#fff5f5;grid-template-columns:auto minmax(0,1fr) auto;align-items:start;gap:12px;margin-top:22px;padding:14px;display:grid}.lecture-error strong{color:var(--ink);font-size:13px}.lecture-error p{color:#6f3939;margin:4px 0 0;font-size:12px;line-height:1.5}.lecture-refresh-warning{color:var(--warning);align-items:center;gap:7px;margin-top:18px;font-size:12px;display:flex}.lecture-list{border-top:1px solid var(--line);margin:22px 0 0;padding:0;list-style:none}.lecture-row{border-bottom:1px solid var(--line);grid-template-columns:36px minmax(0,1fr) minmax(150px,auto);align-items:start;gap:14px;min-height:94px;padding:18px 0;display:grid}.lecture-file-icon{background:var(--soft);width:36px;height:36px;color:var(--accent-strong);border-radius:6px;place-items:center;display:grid}.lecture-copy{min-width:0}.lecture-title-line{align-items:center;gap:10px;min-width:0;display:flex}.lecture-title-line h3{text-overflow:ellipsis;white-space:nowrap;margin:0;overflow:hidden}.lecture-status{border:1px solid var(--line);min-height:24px;color:var(--muted);white-space:nowrap;border-radius:999px;flex:none;align-items:center;gap:5px;padding:2px 8px;font-size:11px;font-weight:650;display:inline-flex}.lecture-status.active{background:var(--accent-soft);color:var(--accent-strong);border-color:#bad8c7}.lecture-status.success{color:var(--accent-strong);border-color:#bad8c7}.lecture-status.warning{color:var(--warning);border-color:#e6cda9}.lecture-status.danger{color:var(--danger);border-color:#e1b8b8}.lecture-meta{color:var(--muted);flex-wrap:wrap;gap:5px 14px;margin:7px 0 0;font-size:12px;display:flex}.lecture-meta span+span:before{color:#b5bbb7;content:"•";margin-right:14px}.lecture-progress-row{color:var(--muted);align-items:center;gap:9px;margin-top:10px;font-size:10px;display:flex}.lecture-progress{background:#e5e9e6;width:min(240px,70%);height:3px;overflow:hidden}.lecture-progress span{background:var(--accent);height:100%;transition:width .16s linear;display:block}.lecture-status-copy{text-align:right;justify-items:end;gap:5px;padding-top:2px;display:grid}.lecture-status-copy span,.lecture-status-copy 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var(--accent-soft)}.inline-status{color:var(--muted);justify-self:end;align-items:center;gap:7px;font-size:12px;display:inline-flex}.file-drop{min-height:230px;color:var(--muted);cursor:pointer;background:#fbfcfb;border:1px dashed #aeb9b2;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:9px;font-size:13px;display:flex}.file-drop:hover{border-color:var(--accent);background:var(--accent-soft)}.file-drop svg{color:var(--accent)}.file-drop-title{color:var(--ink);font-size:15px;font-weight:700}.file-drop input{clip:rect(0, 0, 0, 0);width:1px;height:1px;position:absolute;overflow:hidden}.selected-files{border-top:1px solid var(--line);margin-top:28px;padding-top:24px}.selected-files-heading{justify-content:space-between;align-items:center;display:flex}.selected-files-heading>div{min-width:0}.icon-button{border:1px solid var(--line);width:34px;height:34px;color:var(--muted);cursor:pointer;background:#fff;border-radius:6px;place-items:center;display:grid}.icon-button:hover{color:var(--ink);border-color:#b8bfba}.selected-files ul{border-top:1px solid var(--line);margin:10px 0 20px;padding:0;list-style:none}.selected-files li{border-bottom:1px solid var(--line);min-height:68px;color:var(--muted);grid-template-columns:22px minmax(0,1fr) auto;align-items:start;gap:11px;padding:13px 0;font-size:13px;display:grid}.selected-files li>svg{margin-top:2px}.upload-file-copy{min-width:0}.upload-file-line,.upload-file-status{justify-content:space-between;align-items:center;gap:12px;display:flex}.upload-file-status{color:var(--muted);margin-top:5px;font-size:11px}.upload-progress{background:#e5e9e6;width:100%;height:3px;margin-top:7px;overflow:hidden}.upload-progress span{background:var(--accent);height:100%;transition:width .12s 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64px}.auth-brand{min-height:40px;color:var(--ink);align-items:center;gap:10px;font-size:17px;font-weight:700;display:inline-flex}.auth-panel{margin-top:64px}.auth-heading{margin-bottom:28px}.auth-heading h1{margin-bottom:10px;font-size:28px}.auth-heading>p:last-child{color:var(--muted);margin-bottom:0;font-size:14px;line-height:1.55}.oauth-button{border-color:var(--line);width:100%;color:var(--ink);background:#fff}.oauth-button:hover:not(:disabled){background:var(--soft);border-color:#b5bdb8}.auth-divider{color:var(--muted);justify-content:center;margin:24px 0;font-size:12px;display:flex;position:relative}.auth-divider:before{background:var(--line);content:"";height:1px;position:absolute;inset:50% 0 auto}.auth-divider span{background:var(--surface);padding:0 10px;position:relative}.segmented-control{border-bottom:1px solid var(--line);grid-template-columns:1fr 1fr;display:grid}.segmented-control button{min-height:40px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-bottom:2px solid #0000;font-size:13px;font-weight:650}.segmented-control button.active{border-bottom-color:var(--accent);color:var(--ink)}.auth-form{gap:18px;margin-top:24px;display:grid}.auth-form label{color:var(--ink);gap:7px;font-size:13px;font-weight:650;display:grid}.auth-form input{width:100%;min-height:42px;color:var(--ink);background:#fff;border:1px solid #c9cfcb;border-radius:6px;outline:none;padding:8px 11px}.auth-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.auth-submit{width:100%;margin-top:2px}.form-link{color:var(--accent-strong);justify-self:end;margin-top:-8px;font-size:12px;font-weight:650}.auth-message{border-left:3px solid;margin:18px 0 0;padding:8px 10px;font-size:13px;line-height:1.5}.auth-message.error{color:var(--danger);background:#fff5f5}.auth-message.success{background:var(--accent-soft);color:var(--accent-strong)}.auth-back{color:var(--accent-strong);margin-top:24px;font-size:13px;font-weight:650;display:inline-flex}.spin{animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.spin{animation:none}.lecture-progress span,.upload-progress span{transition:none}}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (max-width:760px){:root{--sidebar-width:0px}.sidebar{border:0;border-top:1px solid var(--line);flex-direction:row;align-items:center;width:100%;height:64px;padding:7px 12px;inset:auto 0 0}.brand,.sidebar-footer,.primary-nav .muted{display:none}.primary-nav{grid-template-columns:repeat(2,1fr);width:100%;margin:0}.nav-link{flex-direction:column;justify-content:center;gap:3px;min-height:48px;padding:0 8px;font-size:11px}.main-content{margin-left:0;padding-bottom:70px}.page-frame,.page-frame.narrow{width:calc(100% - 32px);padding-top:24px}.page-header{flex-direction:column;gap:18px}.header-actions{justify-content:space-between;width:100%}h1{font-size:26px}.empty-state{min-height:220px;padding:24px 18px}.lecture-error{grid-template-columns:auto minmax(0,1fr)}.lecture-error .button{grid-column:2;justify-self:start}.lecture-row{grid-template-columns:36px minmax(0,1fr)}.lecture-status-copy{text-align:left;grid-column:2;justify-items:start}.lecture-title-line{flex-direction:column;align-items:flex-start;gap:7px}.lecture-title-line h3{white-space:normal;-webkit-line-clamp:2;-webkit-box-orient:vertical;width:100%;display:-webkit-box;overflow:hidden}.upload-course{grid-template-columns:1fr;gap:18px}.inline-status{justify-self:start}.selected-files li{grid-template-columns:20px minmax(0,1fr)}.upload-file-actions{grid-column:2;justify-content:flex-end}.upload-submit{width:100%}.auth-page{width:calc(100% - 32px);padding-top:22px}.auth-panel{margin-top:40px}}