body{min-height:100vh;background:radial-gradient(ellipse at 15% 75%,#b5c8a8 0,transparent 45%),linear-gradient(125deg,#244c3d,#567b66);padding-bottom:64px}body>header{background:#173d2e66;padding:14px 24px}.computer-desktop{padding:30px;color:#fff;min-height:calc(100vh - 130px)}.computer-welcome{margin:25px 0 35px}.computer-welcome small{color:#e3eddb}.computer-welcome h1{font-size:34px}.desktop-shortcuts{display:grid;grid-template-columns:repeat(2,110px);gap:15px}.computer-shortcut{display:grid;gap:7px;text-align:center;justify-items:center}.desktop-shortcuts button{background:#ffffff10;color:white;border-color:#ffffff25;min-height:96px}.computer-shortcut span{font-size:32px}.computer-shortcut strong{font-size:13px}.computer-window{position:fixed;inset:65px 4vw 75px;max-width:none;padding:0 18px 18px;background:#f6f8f3;border:1px solid #c6d4c5;border-radius:14px;box-shadow:0 22px 75px #10291e66;overflow:auto;z-index:10}.computer-window.maximized{inset:48px 0 61px;border-radius:0}.computer-titlebar{display:flex;align-items:center;gap:7px;position:sticky;top:0;background:#e6eee5;z-index:20;padding:9px;margin:0 -18px 14px;border-bottom:1px solid #c5d4c1}.computer-titlebar strong{margin-left:auto}.computer-titlebar button{padding:4px 13px}.computer-taskbar{position:fixed;bottom:0;left:0;right:0;display:flex;align-items:center;gap:8px;padding:9px 14px;background:#edf3edee;backdrop-filter:blur(12px);z-index:50;border-top:1px solid #bccfbc}.computer-clock{margin-right:auto;white-space:nowrap}.computer-start{position:fixed;bottom:69px;right:14px;width:min(580px,calc(100vw - 28px));max-height:75vh;overflow:auto;background:#f6faf5;border:1px solid #c9d7c4;border-radius:16px;padding:20px;z-index:60;box-shadow:0 15px 50px #12362555}.computer-start-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.computer-start p{font-size:12px}.teacher-only{display:none}.teacher-mode .teacher-only{display:inline;font-size:12px}.teacher-mode #lessonTitle{font-size:27px}.teacher-mode .lesson-coach{font-size:18px}@media(max-width:600px){.computer-window{inset:55px 6px 72px;padding:0 10px 10px}.computer-titlebar{margin:0 -10px 10px}.computer-start-grid{grid-template-columns:repeat(2,1fr)}.computer-taskbar{gap:4px;padding:7px}.computer-taskbar button,.computer-taskbar select{font-size:12px;padding:8px 6px}.computer-clock{font-size:11px}.teacher-mode .teacher-only{display:none}.computer-welcome h1{font-size:26px}}@media print{.computer-desktop,.computer-taskbar,.computer-start,.computer-titlebar{display:none}.computer-window{position:static;overflow:visible}}
.system-dialog{border:1px solid #bccdbc;border-radius:14px;padding:22px;width:min(420px,90vw);color:#294632}.system-dialog::backdrop{background:#10291e66}.system-dialog label{display:grid;gap:8px;margin:16px 0}.system-dialog button{margin:5px}.system-dialog p{font-size:13px}.system-clock{margin-right:auto;font-size:12px}.computer-taskbar{flex-wrap:wrap}body[data-wallpaper=blue]{background:radial-gradient(ellipse at 20% 75%,#94bed0,transparent 50%),linear-gradient(125deg,#214866,#497f9c)}body[data-wallpaper=night]{background:linear-gradient(125deg,#19272e,#38434e)}@media(max-width:600px){.computer-window{bottom:115px}.computer-taskbar{min-height:100px}.computer-start{bottom:110px}.system-clock{margin-right:0}.computer-taskbar button{font-size:11px}}
.embedded-app{background:#f6f8f3;padding:0}.embedded-app>header,.embedded-app .top,.embedded-app #backLessons,.embedded-app #wide{display:none}.embedded-app main{max-width:none;padding:8px}.embedded-app iframe{height:calc(100vh - 120px);min-height:400px}.app-window{position:fixed;width:min(1050px,88vw);height:72vh;min-width:300px;min-height:300px;background:#f7faf5;border:1px solid #9eb7a2;border-radius:10px;box-shadow:0 18px 55px #10291e66;overflow:hidden;resize:both;display:flex;flex-direction:column}.app-window-head{display:flex;gap:6px;align-items:center;padding:8px;background:#e5eee5;cursor:move;touch-action:none}.app-window-head strong{margin-left:auto}.app-window-head button{padding:3px 10px}.app-window iframe{flex:1;height:0;min-height:0;border:0;border-radius:0}.app-window.expanded{left:0!important;top:48px!important;width:100vw;height:calc(100vh - 120px);resize:none}.computer-taskbar,.computer-start{z-index:10000}.app-task[data-dirty=true]:after{content:' ●';color:#996715}@media(max-width:600px){.app-window{left:2vw!important;top:52px!important;width:96vw;height:calc(100vh - 175px);resize:none}.app-window.expanded{height:calc(100vh - 175px)}.app-task{max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}}

.open-app-tasks{display:flex;gap:5px;max-width:min(40vw,550px);overflow-x:auto;flex-wrap:nowrap}.open-app-tasks .app-task{flex:0 0 auto;max-width:170px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.app-task[aria-pressed=true]{background:#355743;color:white;border-color:#355743}.window-list>button{display:block;width:100%;text-align:right;margin:8px 0}.computer-taskbar{max-height:110px;overflow-y:auto}.window-chooser{white-space:nowrap}@media(max-width:600px){.open-app-tasks{display:none}.window-list{max-height:75vh;overflow:auto}}

.desktop-context{position:fixed;z-index:20000;width:230px;padding:7px;border:1px solid #bccdbc;border-radius:10px;background:#f8fbf6;box-shadow:0 12px 30px #10291e44}.desktop-context button{display:block;text-align:right;width:100%;border:0;background:transparent;padding:11px}.desktop-context button:hover{background:#e0ecdf}

.desktop-user-files{display:flex;flex-wrap:wrap;gap:15px;margin-top:22px}.desktop-file{width:110px;text-align:center}.desktop-file>.computer-shortcut{width:100%;background:#ffffff12;color:white;border-color:#ffffff22;min-height:95px;overflow-wrap:anywhere}.desktop-delete{font-size:11px;padding:4px 7px;margin-top:4px;background:#ffffffdc}

.dragging-file{opacity:.55}.desktop-drop-over{outline:3px solid #eac85c!important;background:#ffffff44!important}

.desktop-view-controls{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px;color:#fff;font-size:13px}.desktop-view-controls select{padding:6px}.desktop-user-files[data-icon-size=small] .desktop-file{width:90px}.desktop-user-files[data-icon-size=small] .computer-shortcut span{font-size:24px}.desktop-user-files[data-icon-size=large] .desktop-file{width:140px}.desktop-user-files[data-icon-size=large] .computer-shortcut span{font-size:46px}

.lesson-delivery{background:#edf4e9;border:1px solid #b9cdb5;border-radius:8px;padding:9px;margin-bottom:10px}.lesson-delivery>div{display:flex;flex-wrap:wrap;gap:9px;padding-top:10px}.lesson-delivery label{display:grid;gap:4px;font-size:13px}.lesson-delivery input{max-width:200px}.lesson-delivery p,.lesson-delivery small{flex-basis:100%;margin:0}.lesson-delivery summary{font-weight:600}