/* Native Teacher palette from layers-windows/layers.py, scoped to the preview. */
.teacher-demo{margin-bottom:64px;font-family:var(--layers-font);min-width:0}.td-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:24px}.td-intro .eyebrow{margin-bottom:12px}.td-intro p{max-width:660px;color:var(--layers-muted);margin:0!important}.td-reset,.td-shortcuts button,.td-draw-hint button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 14px;border:1px solid var(--layers-border);border-radius:10px;background:white;color:var(--layers-ink);font-size:.82rem!important;font-weight:700;white-space:nowrap}.td-reset svg{width:18px;height:18px}.td-shortcuts{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px}.td-shortcuts>span{font-size:.8rem;color:var(--layers-muted);margin-right:6px}.td-shortcuts button:hover,.td-reset:hover{background:var(--layers-soft)}
.td-desktop{--td-bg:#171b24;--td-field:#292f3c;--td-border:#343c4d;--td-text:#f0f3fa;--td-muted:#a9b3c6;position:relative;isolation:isolate;min-height:810px;border:1px solid #c5d1d4;border-radius:18px;background:radial-gradient(ellipse at 15% 10%,#e8efe6,transparent 70%),#d9e1e6;box-shadow:0 24px 65px #183b4320;overflow:hidden;font:13px/1.45 'Segoe UI',sans-serif;color:var(--td-text);color-scheme:dark}
.teacher-demo .td-desktop button,.teacher-demo .td-desktop input,.teacher-demo .td-desktop select,.teacher-demo .td-desktop textarea{font:inherit;letter-spacing:0;line-height:1.4}.td-desktop button{border:1px solid var(--td-border);border-radius:7px;background:#252b38;color:var(--td-text);min-height:44px;padding:8px 12px;display:inline-flex;align-items:center;justify-content:center;gap:7px;transition:background .15s}.td-desktop button:hover{background:#343d50}.td-desktop button:disabled{opacity:.5;cursor:default}.td-desktop button[aria-pressed=true]{background:#394683;border-color:#8595f2;color:#fff}.teacher-demo .td-desktop :focus-visible{outline:3px solid #aab8ff;outline-offset:2px}.td-desktop svg{width:19px;height:19px;flex-shrink:0}.td-desktop-bar{height:44px;display:flex;align-items:center;justify-content:space-between;background:#f7f9fabf;border-bottom:1px solid #c5d1d4;padding:0 20px;color:#4e5e63;font-size:12px}.td-desktop-bar>span:first-child{display:flex;align-items:center;gap:9px}.td-desktop-bar svg{color:#5b7164}
.td-lesson-area{width:calc(100% - 408px);padding:28px 28px 0;position:relative}.td-caption{position:relative;background:#0a0a0aee;border:1px solid #343c4d;border-radius:9px;padding:12px 42px 14px 16px;box-shadow:0 8px 20px #13212b25;min-height:105px;margin-bottom:24px;display:grid;gap:4px}.td-caption-label{font-size:11px;letter-spacing:.03em;color:#aab8ff}.td-caption-label small{background:#292f3c;color:#f0f3fa;border-radius:4px;padding:2px 5px;margin-left:6px}.td-caption strong{font-size:17px;font-weight:500;line-height:1.45}.td-caption>button{position:absolute;right:3px;top:32px;background:transparent;border:0;padding:4px;min-width:36px}
.td-slide{position:relative;background:#f8f6ef;border:1px solid #d2d8cd;border-radius:4px;min-height:450px;padding:25px 32px 27px;color:#314e3c;box-shadow:0 8px 24px #13212b0d;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between}.td-slide-heading{display:flex;justify-content:space-between;font-size:10px;font-weight:700;letter-spacing:.13em;color:#69766c}.teacher-demo .td-slide h3{font:600 clamp(22px,2.25vw,32px)/1.12 Georgia,serif;letter-spacing:-.035em;margin:20px 0 8px;text-wrap:balance;max-width:420px}.teacher-demo .td-slide>p{font-size:13px;color:#68766a;margin:0}.td-slide .td-plant{display:block;width:100%;height:210px;margin:2px auto;max-width:430px}.td-slide-prompt{border-top:1px solid #dce0d4;padding-top:14px;display:grid;gap:4px}.td-slide-prompt small{font-size:9px;letter-spacing:.14em;color:#68766a}.td-slide-prompt strong{font-size:15px;font-weight:600}.td-slide-prompt>span{font-size:11px;color:#68766a}.td-ink{position:absolute;inset:0;width:100%!important;height:100%!important;pointer-events:none;z-index:1}.td-drawing .td-ink{pointer-events:auto;touch-action:none;cursor:crosshair}.td-slide-nav{display:flex;align-items:center;justify-content:center;gap:12px;color:#4e5e63;font-size:12px;margin-top:12px}.td-slide-nav button{background:#f8f9f8;color:#4e5e63;border-color:#c0cbc8;padding:5px;min-width:44px}.td-slide-nav button:hover{background:white}
.td-window{position:absolute;right:25px;top:72px;width:342px;max-height:610px;background:var(--td-bg);border:1px solid var(--td-border);border-radius:12px;box-shadow:0 16px 40px #13212b40;overflow:hidden;z-index:3}.td-titlebar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:4px 6px 4px 16px;border-bottom:1px solid #343c4d}.td-titlebar strong{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600}.td-titlebar strong:focus{outline:none}.td-titlebar svg{color:#aab8ff}.td-titlebar button{background:transparent;border:0;width:44px;padding:8px}.td-titlebar button:hover{background:#3a1010}.td-titlebar button svg{color:var(--td-muted);width:17px}.td-window-body{padding:16px;max-height:554px;overflow:auto;scrollbar-width:thin;scrollbar-color:#596378 #171b24}.td-window-body label{display:block;color:var(--td-muted);font-size:11px}.td-window-body input:not([type=range]),.td-window-body textarea,.td-window-body select{display:block;width:100%;min-width:0;margin-top:5px;border:1px solid var(--td-border);border-radius:6px;background:var(--td-field);color:var(--td-text);padding:10px;min-height:44px}.td-window-body textarea{resize:vertical}.td-window-body form{margin:14px 0 0}.td-row{display:flex;align-items:flex-end;gap:8px;margin:12px 0}.td-row>label,.td-row>.td-grow{flex:1;min-width:0}.td-between{align-items:center;justify-content:space-between}.td-segment{display:flex;gap:5px;margin-bottom:16px}.td-segment button{flex:1;font-size:12px!important;padding:8px 5px}.td-presets{display:flex;gap:5px;flex-wrap:wrap;margin:14px 0}.td-presets button{flex:1;min-width:40px;padding:6px 3px;font-size:12px!important}.td-clock{border:1px solid var(--td-border);background:#202632;text-align:center;border-radius:9px;padding:22px 8px 16px;margin:16px 0 12px;display:grid;gap:6px}.td-clock>span{font-size:58px;font-weight:300;letter-spacing:0;font-variant-numeric:tabular-nums;line-height:1.1}.td-clock>small{color:var(--td-muted);font-size:11px}.td-window progress{display:block;width:100%;height:5px;border:0;accent-color:#2ed573;margin-bottom:18px;background:#343c4d}.td-window progress::-webkit-progress-bar{background:#343c4d;border-radius:5px}.td-window progress::-webkit-progress-value{background:#2ed573;border-radius:5px}.td-clock~.td-row button{flex:1}.td-desktop .td-green{background:#2ed573;color:#092114;border-color:#2ed573;font-weight:700}.td-desktop .td-green:hover{background:#53e58b}.td-desktop .td-purple{background:#6475e8;border-color:#6475e8;color:#fff;font-weight:600}.td-desktop .td-purple:hover{background:#5262ce}.td-desktop .td-amber{background:#ffa502;color:#241500;border-color:#ffa502;font-weight:700}.td-desktop .td-red{background:#ff4757;color:#180508;border-color:#ff4757;font-weight:700}.td-desktop .td-wide{width:100%;margin:8px 0 0}.teacher-demo .td-note{font-size:11px;color:var(--td-muted);margin:14px 0 0;line-height:1.55}.teacher-demo .td-error{font-size:12px;color:#ff9da7;margin:10px 0 0}.td-picked{display:grid;place-items:center;min-height:145px;background:#202632;border:1px solid var(--td-border);border-radius:9px;color:#bbc6ff;font-size:44px;font-weight:600;margin:18px 0 12px;overflow-wrap:anywhere;text-align:center}.td-roster{display:flex;flex-wrap:wrap;gap:5px;margin-top:12px}.td-roster span{padding:6px 9px;background:#202632;border-radius:5px;font-size:12px;color:var(--td-muted)}.td-roster .selected{background:#394683;color:#fff}.teacher-demo .td-class-name{font-size:15px;font-weight:600;margin:0}.td-success{color:#2ed573;font-size:12px}.td-room-code{border:1px solid var(--td-border);border-radius:8px;padding:12px;background:#202632;display:grid;gap:4px;text-align:center;margin:14px 0}.td-room-code small{color:var(--td-muted);font-size:10px}.td-room-code strong{font:700 30px/1.4 Consolas,monospace;letter-spacing:.04em}.td-help{background:#2a0808;border:1px solid #743542;border-radius:7px;padding:6px 8px;display:flex;gap:8px;align-items:center;font-size:11px;color:#ff9da7;margin-bottom:14px}.td-help button{font-size:11px!important;padding:6px}.td-control{display:flex;align-items:center;gap:10px;border:1px solid var(--td-border);border-radius:7px;background:#202632;padding:12px;margin-top:10px}.td-control>div{flex:1}.td-control strong{display:block;font-size:13px;font-weight:600}.td-control small{display:block;color:var(--td-muted);font-size:10px;margin-top:4px}.td-control button{min-width:50px}.td-danger-text{color:#ff9da7}.td-students{margin:16px 0 8px;padding-top:12px;border-top:1px solid var(--td-border);display:grid;gap:10px}.td-students>div{display:flex;align-items:center;gap:10px}.td-student-number{width:30px;height:30px;background:#292f3c;display:grid;place-items:center;border-radius:8px;color:#bbc6ff}.td-students strong,.td-students small{display:block;font-size:11px}.td-students small{color:#a9b3c6;margin-top:3px}.teacher-demo .td-students p{font-size:11px;overflow-wrap:anywhere;color:#b9c5ff;margin:0}.td-language-pair{padding:12px;background:#202632;border:1px solid var(--td-border);border-radius:7px;margin-top:12px;display:flex;justify-content:space-between}.td-definition{background:#111118;border:1px solid var(--td-border);border-radius:6px;padding:16px;margin-top:15px;min-height:120px;line-height:1.7}.td-center{display:block;text-align:center;margin:0 0 12px!important}.td-gauge svg{width:100%;height:150px;margin:8px 0}.td-gauge text{font:600 30px 'Segoe UI',sans-serif}.td-window input[type=range]{width:100%;accent-color:#aab8ff;height:44px;cursor:pointer}
.td-dock{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);width:max-content;max-width:calc(100% - 48px);display:flex;align-items:center;justify-content:center;gap:18px;padding:12px 16px;background:#14171e;border:1px solid #343c4d;border-radius:12px;box-shadow:0 12px 32px #15222a50;z-index:5}.td-dock-brand{display:flex;align-items:center;gap:7px;font-size:15px}.td-dock-brand svg{color:#aab8ff;width:25px;height:25px}.td-dock-languages{display:flex;align-items:center;gap:7px;white-space:nowrap;font-size:12px}.td-dock-languages select{background:#202632;color:#f0f3fa;border:1px solid #343c4d;border-radius:6px;min-height:44px;padding:4px 6px;max-width:105px}.td-dock-languages>span:nth-child(2){color:#a9b3c6}.td-dock-tools{display:flex;gap:6px}.td-dock-tools button{font-size:12px!important;padding:8px 10px;white-space:nowrap}.td-more-wrap{position:relative}.td-more-menu{position:absolute;bottom:calc(100% + 16px);right:0;background:#171b24;border:1px solid #343c4d;border-radius:9px;padding:5px;width:180px;box-shadow:0 8px 25px #0005}.td-more-menu button{display:flex;justify-content:flex-start;width:100%;border:0;background:transparent;min-height:46px}.td-draw-palette{position:absolute;left:9px;top:224px;display:grid;gap:5px;border-radius:9px;background:#171b24;padding:7px;border:1px solid #343c4d;z-index:4;box-shadow:0 6px 20px #15222a30}.td-draw-palette>strong{font-size:10px;text-align:center;margin:2px 0 3px}.td-draw-palette button{width:44px;padding:5px;font-size:10px!important}.td-highlight-icon{width:20px;height:8px;background:#ffdd00;transform:rotate(-30deg);border-radius:2px}.td-colors{display:grid;grid-template-columns:1fr 1fr;gap:3px;border-block:1px solid #343c4d;padding:6px 0}.td-colors button{width:21px;min-height:28px;padding:0;background:transparent}.td-colors span{width:12px;height:12px;border-radius:50%;border:1px solid #ffffff40}.td-colors button[aria-pressed=true]{background:#394683}.td-draw-hint{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:16px;font-size:.8rem;color:var(--layers-muted)}.teacher-demo .td-footer-note{font-size:.8rem;color:var(--layers-muted);margin:18px 0 0}.td-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
@media(max-width:1140px){.td-dock{flex-wrap:wrap;gap:10px 20px;max-width:calc(100% - 32px);width:660px}.td-dock-tools{justify-content:center;flex-basis:100%}.td-desktop{min-height:860px}.td-lesson-area{padding:24px 20px 0;width:calc(100% - 365px)}.td-window{right:18px;width:326px}.td-slide{padding:25px 22px}.td-caption strong{font-size:15px}.td-draw-palette{left:3px}}
@media(max-width:800px){.td-intro{display:block}.td-reset{margin-top:18px}.td-desktop{min-height:0;display:flex;flex-direction:column;overflow:visible;border-radius:14px}.td-desktop-bar{border-radius:14px 14px 0 0;padding:0 12px;font-size:10px;gap:10px}.td-desktop-bar svg{width:16px}.td-lesson-area{width:100%;padding:16px 14px 0;order:2}.td-dock{order:1;position:relative;bottom:auto;left:auto;transform:none;width:auto;max-width:none;margin:14px 14px 0;padding:10px;gap:8px 16px;box-shadow:0 5px 16px #15222a20}.td-dock-tools{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:100%;gap:6px}.td-dock-tools button{width:100%;font-size:11px!important;padding:8px 5px}.td-dock-languages{font-size:11px}.td-dock-brand{font-size:14px}.td-dock-brand svg{width:20px}.td-more-menu{bottom:auto;top:calc(100% + 8px);z-index:10}.td-caption{min-height:105px;margin-bottom:14px}.td-caption strong{font-size:15px}.td-slide{min-height:440px;padding:22px}.teacher-demo .td-slide h3{font-size:28px;max-width:90%}.td-slide .td-plant{height:200px}.td-window{order:3;position:relative;right:auto;top:auto;width:auto;margin:16px 14px;max-height:none;box-shadow:0 8px 20px #15222a20}.td-window-body{max-height:none;padding:16px}.td-slide-nav{margin:10px 0}.td-draw-palette{position:relative;left:auto;top:auto;order:3;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;margin:14px 14px 0;gap:6px}.td-draw-palette>strong{padding-inline:3px}.td-draw-palette .td-colors{display:flex;gap:4px;border:0;padding:0}.td-colors button{width:28px;min-height:44px}.td-colors span{width:16px;height:16px}.td-draw-palette button{min-height:44px}.td-draw-hint{display:block}.td-draw-hint button{margin-top:10px}.td-shortcuts>span{flex-basis:100%}.td-shortcuts button{font-size:.75rem!important;flex:1;padding:8px;min-width:140px}.teacher-demo{margin-bottom:42px}}
.td-tool-host{display:contents}.td-tool-host[hidden]{display:none}
.td-titlebar{cursor:grab;touch-action:none;user-select:none}.td-titlebar:active{cursor:grabbing}
@media(max-width:800px){.td-window{transform:none!important;order:2;scroll-margin-top:90px}.td-lesson-area{order:3}.td-draw-palette{order:2}.td-titlebar{cursor:default;touch-action:auto}}
@media(prefers-reduced-motion:reduce){.td-desktop button{transition:none}}