.teacher-app{--bg:#f3f4ee;--paper:#fff;--line:#e3e8dd;--green:#315e4b;--light:#e5ede2;font-size:16px;background:var(--bg);-webkit-tap-highlight-color:transparent}.teacher-app button{min-height:50px;border-radius:14px;font-size:16px;font-weight:550;user-select:none}.teacher-app button:active{transform:scale(.98)}.teacher-app input,.teacher-app textarea,.teacher-app select{font-size:17px;min-height:50px;border-radius:12px}.teacher-app h1,.teacher-app h2,.teacher-app h3{letter-spacing:0}.tablet-app{max-width:1120px;margin:auto;min-height:100dvh;padding-top:env(safe-area-inset-top)}
.app-header{height:78px;padding:12px 30px;display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--bg);position:sticky;top:0;z-index:15}.app-heading{display:flex;gap:12px;align-items:center;min-width:0}.app-mark{font-size:32px;color:var(--gold)}.app-heading h1{font-size:20px;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.app-header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}.connection{font-size:12px;color:var(--muted);white-space:nowrap}.teacher-app .icon-button{width:50px;height:50px;min-width:50px;padding:12px;border:0;background:transparent;font-size:28px;line-height:1}.icon-button svg,.tabbar svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}.app-header .icon-button{background:#fff9}.app-content{padding:14px 30px calc(116px + env(safe-area-inset-bottom))}.app-view{max-width:960px;margin:auto}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px}.section-heading h2{font-size:26px;margin:0}.subtle{font-size:14px;color:var(--muted)}
.lesson-card{background:var(--paper);border-radius:24px;border:1px solid var(--line);padding:25px 30px 22px}.lesson-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:20px}.status-pill{display:inline-flex;align-items:center;padding:7px 12px;border-radius:30px;background:var(--light);color:var(--green);font-size:13px;white-space:nowrap}.lesson-card>h2{font-size:24px;line-height:1.45;margin:0 0 8px}.teacher-app details summary{cursor:pointer;min-height:44px;display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted);list-style:none}.teacher-app details summary:after{content:'⌄';margin-left:auto}.teacher-app details[open] summary:after{content:'⌃'}.teacher-app details summary::-webkit-details-marker{display:none}.task-details p{font-size:15px;line-height:1.7;margin:0 0 12px;color:var(--muted);white-space:pre-wrap}.timer-main{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px 0 21px;gap:4px}.timer-main output{font-size:clamp(80px,11vw,116px);font-weight:500;letter-spacing:-5px;line-height:1.18;font-variant-numeric:tabular-nums}.timer-main span{font-size:14px;color:var(--muted)}.timer-actions{display:flex;justify-content:center;gap:12px}.timer-actions button:first-child{min-width:210px;min-height:56px;font-size:19px}.timer-actions button:last-child{min-width:100px}.lesson-progress{margin-top:23px}.lesson-progress>div:first-child{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:6px}.teacher-app .text-button{background:transparent;border:0;padding:8px 0;color:var(--muted);min-height:46px;font-size:15px}.text-button strong{color:var(--green);font-size:20px;margin-left:8px}.text-button span{font-size:14px}.progress{height:6px}.quick-section{margin-top:26px}.quick-section h3{font-size:15px;font-weight:500;margin-bottom:13px;color:var(--muted)}.quick-tasks{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.quick-tasks button{display:flex;align-items:center;justify-content:center;gap:13px;padding:18px 10px;border:0;background:#e8ece2;min-height:78px}.quick-tasks b{font-size:18px;font-weight:550}.task-icon{font-size:28px;color:var(--green);font-weight:400}
.tabbar{position:fixed;bottom:0;left:0;right:0;height:calc(84px + env(safe-area-inset-bottom));padding:8px max(22px,calc((100vw - 600px)/2)) calc(8px + env(safe-area-inset-bottom));display:flex;gap:18px;align-items:stretch;background:#fffffff5;border-top:1px solid var(--line);z-index:30;backdrop-filter:blur(15px)}.teacher-app .tabbar button{flex:1;border:0;background:none;border-radius:18px;color:#8b9487;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;position:relative;font-size:13px;min-width:0}.teacher-app .tabbar button.active{color:var(--green);background:var(--light)}.tabbar i{position:absolute;top:7px;left:calc(50% + 12px);width:7px;height:7px;background:var(--gold);border-radius:50%}
.remote-layout{display:grid;grid-template-columns:1fr;gap:22px}.screen-card{background:white;border:1px solid var(--line);border-radius:20px;overflow:hidden}.preview{aspect-ratio:16/9}.preview iframe{pointer-events:none}.preview-caption{padding:15px 20px;display:flex;justify-content:space-between;font-size:16px;gap:15px}.preview-caption span:last-child{color:var(--muted);font-variant-numeric:tabular-nums}.remote-controls{display:flex;flex-direction:column;gap:14px}.remote-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.remote-grid button{min-height:70px;font-size:19px;display:flex;gap:18px;align-items:center;justify-content:center}.remote-grid button span{font-size:25px}.mode-controls,.remote-secondary{display:flex;gap:10px}.mode-controls button,.remote-secondary button{flex:1;font-size:15px}.teacher-app .mode-controls button{background:var(--light);border-color:transparent}.teacher-app .mode-controls button.primary{background:var(--green)}
.result-list{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}.result-card{background:white;border:2px solid transparent;border-radius:18px;box-shadow:0 0 0 1px var(--line);overflow:hidden}.result-card.is-selected{border-color:var(--green);background:#f7faf3;box-shadow:none}.result-card-main{padding:19px 20px 8px}.result-card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.result-student{display:flex;align-items:center;gap:10px;font-size:16px}.student-avatar{width:40px;height:40px;border-radius:12px;background:var(--light);display:grid;place-items:center;font-size:19px;color:var(--green);font-weight:600}.result-card p{font-size:17px;margin:0;line-height:1.65;white-space:pre-wrap;overflow-wrap:anywhere}.result-card small{font-size:12px}.result-card-footer{padding:8px 14px 14px;display:flex;justify-content:space-between;gap:12px}.teacher-app .result-card-footer button{border:0;background:transparent;min-height:46px;font-size:14px;padding:9px 12px}.teacher-app .result-card-footer button.pick{color:var(--green);background:var(--light);min-width:100px}.result-card.is-selected .pick{background:var(--green)!important;color:white!important}.result-list .empty{grid-column:1/-1;background:white;border-radius:20px;padding:75px 25px;font-size:16px}.selection-dock{position:fixed;bottom:calc(84px + env(safe-area-inset-bottom));left:0;right:0;max-width:1120px;margin:auto;background:#f3f4eef7;backdrop-filter:blur(12px);padding:13px 30px;display:flex;align-items:center;gap:12px;z-index:20;border-top:1px solid var(--line)}.selection-dock>div{margin-right:auto;min-width:0}.selection-dock>div>span{display:block;font-size:14px;margin-bottom:7px}.anonymous-toggle{display:flex;align-items:center;gap:7px;font-size:13px;margin:0}.teacher-app .anonymous-toggle input{min-height:20px;width:20px;height:20px;margin:0;accent-color:var(--green)}.selection-dock>button{min-width:110px}.selection-dock>button:last-child{min-width:65px}.app-view#view-results{padding-bottom:100px}
.teacher-app .modal-backdrop{z-index:50;padding:25px;background:#1e302d65;backdrop-filter:blur(3px)}.teacher-app .app-sheet{border-radius:25px;width:min(620px,100%);padding:25px;max-height:calc(100dvh - 50px);overscroll-behavior:contain}.sheet-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.sheet-heading h2{font-size:23px;margin:0}.sheet-heading .icon-button{background:var(--bg)}.sheet-backdrop{align-items:end}.sheet-backdrop .app-sheet{border-radius:25px 25px 0 0;margin-bottom:-25px;padding-bottom:calc(25px + env(safe-area-inset-bottom));max-height:calc(100dvh - 35px)}.task-type-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:20px}.teacher-app .task-type-tabs button{border:0;background:var(--bg)}.teacher-app .task-type-tabs button.selected{background:var(--green);color:white}.teacher-app #task-title{font-size:20px;padding:12px 0;border:0;border-bottom:1px solid var(--line);border-radius:0;font-weight:550;box-shadow:none}.edit-instruction{margin:10px 0 18px}.edit-instruction textarea{margin:3px 0}.duration-presets{display:flex;gap:8px;flex-wrap:wrap}.duration-presets>button{flex:1;min-width:65px;padding:10px}.duration-presets button.selected{background:var(--light);border-color:var(--green)}.custom-duration{display:flex;align-items:center;gap:6px;width:96px}.custom-duration input{width:68px;padding:10px;text-align:center}.custom-duration span{font-size:14px;color:var(--muted)}.publish-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:28px}.publish-footer .primary{min-width:180px}.publish-footer small,.sheet-note{font-size:13px;color:var(--muted);line-height:1.7}.sheet-note{margin:18px 0 0}.settings-tools{display:grid;gap:10px;margin-bottom:18px}.settings-tools button{text-align:left}.teacher-app #settings-sheet details{border-top:1px solid var(--line);padding:7px 0}.teacher-app #settings-sheet summary{font-size:16px;color:var(--ink)}.teacher-app #settings-form button{margin:16px 0}.release-row{display:flex;gap:10px}.release-row input{min-width:0}.release-row button{min-width:110px}.page-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.page-grid button{text-align:left;min-height:58px;font-size:15px}.page-grid button.current{background:var(--light);border-color:var(--green)}.page-grid button b{color:var(--gold);margin-right:12px}.teacher-app .toast{bottom:calc(105px + env(safe-area-inset-bottom));border-radius:15px;font-size:15px}.teacher-app #modal-content p{line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere}.teacher-app #modal-content .join-code{font-size:42px;letter-spacing:8px}
.pair-screen{min-height:100dvh;display:grid;place-items:center;padding:25px}.pair-card{width:min(420px,100%);text-align:center}.app-symbol{font-size:65px;color:var(--gold)}.pair-card h1{font-size:28px;margin:12px 0}.pair-card>p{color:var(--muted)}.pair-card label{text-align:left;margin-top:35px}.pair-card input{font-size:26px;letter-spacing:6px;text-align:center;padding:16px 8px}.pair-card button{margin-top:18px;min-height:56px}.pair-card .pair-help{font-size:13px;line-height:1.8;margin-top:25px}.pair-card #pair-error{font-size:14px;color:var(--red)}
@media(min-width:900px) and (orientation:landscape){.remote-layout{grid-template-columns:minmax(0,1.4fr) minmax(290px,1fr);align-items:center;gap:24px}.lesson-card{max-width:790px;margin:auto;padding:20px 30px}.quick-section{max-width:790px;margin:22px auto 0}.timer-main{padding:7px 0 14px}.timer-main output{font-size:100px}.lesson-top{margin-bottom:13px}.lesson-progress{margin-top:13px}.quick-tasks button{min-height:68px}.section-heading{margin-bottom:16px}}
@media(max-width:600px){.app-header{height:70px;padding:10px 17px;gap:12px}.app-heading{gap:8px}.app-heading h1{font-size:17px}.app-mark{font-size:27px}.app-header-actions{gap:3px}.connection{display:none}.teacher-app .app-header .icon-button{min-width:44px;width:44px;height:44px;min-height:44px}.app-content{padding:14px 18px calc(112px + env(safe-area-inset-bottom))}.section-heading h2{font-size:24px}.lesson-card{padding:22px 20px;border-radius:22px}.lesson-top{gap:8px;margin-bottom:20px}.lesson-top .subtle{font-size:12px}.lesson-card>h2{font-size:21px}.timer-main{padding:24px 0}.timer-main output{font-size:88px}.timer-actions button:first-child{min-width:0;flex:1}.timer-actions button:last-child{min-width:90px}.quick-tasks{gap:9px}.quick-tasks button{flex-direction:column;gap:6px;min-height:92px;padding:13px 5px}.quick-tasks b{font-size:15px}.tabbar{gap:12px;height:calc(80px + env(safe-area-inset-bottom));padding-left:18px;padding-right:18px}.result-list{grid-template-columns:1fr}.selection-dock{bottom:calc(80px + env(safe-area-inset-bottom));padding:12px 18px;gap:8px}.selection-dock>button{min-width:90px;padding:10px;font-size:15px}.selection-dock>button:last-child{min-width:50px}.teacher-app .modal-backdrop{padding:15px}.teacher-app .app-sheet{padding:20px;max-height:calc(100dvh - 30px)}.sheet-backdrop .app-sheet{margin-bottom:-15px;border-radius:22px 22px 0 0;padding-bottom:calc(20px + env(safe-area-inset-bottom))}.publish-footer{gap:10px}.publish-footer .primary{min-width:150px}.publish-footer small{font-size:12px}.page-grid{grid-template-columns:1fr}.teacher-app #modal-content .join-code{font-size:32px;letter-spacing:5px}}
@media(max-height:650px) and (orientation:landscape){.app-header{height:62px}.app-content{padding-top:5px}.timer-main{padding:4px 0 10px}.timer-main output{font-size:70px}.quick-section{margin-top:16px}.teacher-app .app-sheet{max-height:calc(100dvh - 20px)}}
@media(min-width:900px) and (orientation:landscape){.lesson-card{display:grid;grid-template-columns:1fr 1fr;column-gap:35px;padding:23px 30px}.lesson-top{grid-column:1/-1}.lesson-card>h2{grid-column:1;grid-row:2;align-self:center}.task-details{grid-column:1;grid-row:3}.timer-main{grid-column:2;grid-row:2/4;padding:0 0 12px}.timer-actions{grid-column:2;grid-row:4;gap:10px}.timer-actions button:first-child{min-width:165px;flex:1}.timer-actions button:last-child{min-width:90px}.lesson-progress{grid-column:1;grid-row:4;align-self:end;margin-top:5px}.quick-section{margin-top:25px}.quick-tasks button{min-height:78px}}
@media(min-width:900px) and (max-height:720px) and (orientation:landscape){.app-header{height:64px}.app-content{padding-top:8px}.section-heading{margin-bottom:12px}.section-heading h2{font-size:24px}.lesson-card{padding:16px 25px}.lesson-top{margin-bottom:10px}.timer-main output{font-size:80px}.timer-main{padding-bottom:8px}.lesson-progress{margin-top:0}.quick-section{margin-top:16px}.quick-section h3{margin-bottom:10px}.quick-tasks button{min-height:60px}}
.anonymous-toggle{min-height:44px}.selection-dock>div>span{margin-bottom:0}
/* Main device: 16:9 landscape tablet. Viewport height also accounts for browser bars. */
@media (min-width:900px) and (min-aspect-ratio:8/5){
 .teacher-app{--app-gutter:clamp(24px,3vw,58px);--app-header-h:clamp(64px,9vh,90px);--app-nav-h:clamp(74px,10.8vh,104px)}
 .tablet-app{max-width:none;height:100dvh;min-height:0;display:flex;flex-direction:column;overflow:hidden}
 .app-header{height:var(--app-header-h);flex:0 0 var(--app-header-h);padding:10px var(--app-gutter);position:relative}
 .app-heading h1{font-size:clamp(20px,1.6vw,28px)}
 .app-content{flex:1;min-height:0;overflow:auto;padding:12px var(--app-gutter) calc(var(--app-nav-h) + 18px + env(safe-area-inset-bottom));overscroll-behavior:contain}
 .app-view{max-width:none;margin:0}
 #view-classroom{height:100%;min-height:450px;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:clamp(16px,2.2vh,26px)}
 .section-heading{margin:0 0 18px}.section-heading h2{font-size:clamp(25px,2vw,34px)}
 #view-classroom>.section-heading{margin:0}
 .lesson-card{width:100%;max-width:none;min-height:0;margin:0;padding:clamp(20px,2.8vh,34px) clamp(26px,3vw,48px);column-gap:clamp(36px,5vw,85px);grid-template-columns:minmax(0,1fr) minmax(0,1fr);grid-template-rows:auto minmax(35px,1fr) auto auto;align-content:stretch}
 .lesson-top{margin-bottom:12px}.lesson-top .subtle{font-size:clamp(14px,1.2vw,19px)}
 .status-pill{font-size:clamp(13px,1.1vw,17px)}
 .lesson-card>h2{font-size:clamp(25px,2.3vw,38px);line-height:1.45;align-self:center;margin:0 0 8px;overflow-wrap:anywhere}
 .task-details summary{font-size:clamp(14px,1.2vw,19px)}
 .task-details[open]{max-height:115px;overflow:auto;overscroll-behavior:contain}
 .timer-main{padding:0 0 12px;align-self:center}.timer-main output{font-size:clamp(110px,18vh,196px);letter-spacing:-5px}
 .timer-main span{font-size:clamp(14px,1.2vw,20px)}
 .timer-actions button:first-child{min-height:clamp(56px,7vh,76px);font-size:clamp(19px,1.6vw,26px)}
 .timer-actions button:last-child{min-width:110px;font-size:clamp(16px,1.35vw,22px)}
 .lesson-progress{margin-top:10px}.lesson-progress .text-button{font-size:clamp(15px,1.25vw,20px);min-height:50px}.text-button strong{font-size:clamp(21px,1.8vw,29px)}
 .quick-section{max-width:none;margin:0}.quick-section h3{font-size:clamp(15px,1.2vw,19px);margin-bottom:10px}
 .quick-tasks{gap:clamp(14px,1.6vw,25px)}.quick-tasks button{min-height:clamp(64px,9vh,96px);padding:12px;font-size:20px}.quick-tasks b{font-size:clamp(18px,1.6vw,26px)}.task-icon{font-size:clamp(27px,2.3vw,38px)}
 .tabbar{height:calc(var(--app-nav-h) + env(safe-area-inset-bottom));padding:9px max(var(--app-gutter),calc((100vw - 840px)/2)) calc(9px + env(safe-area-inset-bottom));gap:24px}
 .teacher-app .tabbar button{font-size:clamp(14px,1.1vw,18px);gap:5px}.tabbar svg{width:clamp(25px,2vw,32px);height:clamp(25px,2vw,32px)}
 .remote-layout{grid-template-columns:minmax(0,1.65fr) minmax(340px,.9fr);align-items:center;gap:clamp(26px,3vw,48px)}
 .screen-card{width:100%;max-width:calc((100dvh - var(--app-header-h) - var(--app-nav-h) - 150px)*16/9);margin:auto}
 .preview-caption{font-size:clamp(16px,1.4vw,22px)}
 .remote-controls{gap:clamp(14px,2.1vh,24px)}.remote-grid{gap:clamp(12px,1.5vw,23px)}.remote-grid button{min-height:clamp(70px,11vh,120px);font-size:clamp(19px,1.65vw,28px)}
 .mode-controls button,.remote-secondary button{min-height:clamp(50px,7.5vh,78px);font-size:clamp(15px,1.25vw,21px)}
 .result-list{gap:22px}.result-card p{font-size:clamp(17px,1.35vw,22px)}
 .selection-dock{max-width:none;bottom:calc(var(--app-nav-h) + env(safe-area-inset-bottom));padding:12px var(--app-gutter)}
 .teacher-app .app-sheet{width:min(720px,calc(100vw - 48px))}.teacher-app .toast{bottom:calc(var(--app-nav-h) + 24px + env(safe-area-inset-bottom))}
}
.projection-remote{margin:18px 0;padding:18px;background:var(--light);border-radius:16px}.projection-remote h3{font-size:18px;margin-bottom:7px}.projection-remote>p{font-size:14px;color:var(--muted);margin:0 0 12px}.projection-position{display:grid;grid-template-columns:minmax(120px,1fr) 1fr 1fr;align-items:center;gap:18px;padding:8px 0}.projection-position strong{font-size:14px}.projection-position label{margin:0;font-size:14px}.teacher-app .projection-position input{display:block;padding:0;min-height:36px;accent-color:var(--green);box-shadow:none}.result-card .result-meta{font-size:12px;color:var(--muted);margin-bottom:10px}@media(max-width:600px){.projection-position{grid-template-columns:1fr 1fr;gap:4px 16px}.projection-position strong{grid-column:1/-1}}
.writing-recommendations{background:#e5ede2;border:1px solid #cbdac7;border-radius:18px;padding:20px;margin-top:18px}.recommendation-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.recommendation-heading h3{font-size:20px;margin:0}.recommendation-heading span{font-size:13px;color:var(--muted)}.writing-recommendations .sheet-note{margin:6px 0 14px}.progress-pick{display:flex;align-items:center;justify-content:space-between;gap:18px;background:#fff;border-radius:12px;padding:16px;margin-top:10px}.progress-pick>div{min-width:0}.progress-pick strong{font-size:16px}.progress-pick p{font-size:15px;line-height:1.7;margin:7px 0 0}.progress-pick blockquote{margin:8px 0 0;padding-left:12px;border-left:3px solid #afc5a9;font-size:14px;overflow-wrap:anywhere}.progress-pick button{flex-shrink:0;background:var(--green);color:white}.recommendation-empty{font-size:15px;line-height:1.8;margin:12px 0 0}
@media(min-width:900px) and (min-aspect-ratio:8/5){#view-classroom{height:auto;min-height:0;display:block}#view-classroom>.section-heading{margin-bottom:16px}.classroom-layout{gap:clamp(22px,2vw,40px);grid-template-columns:minmax(0,1.35fr) minmax(360px,1fr)}.classroom-deck .preview-caption{padding:12px 16px;font-size:17px}.classroom-deck .remote-grid button{min-height:clamp(54px,7vh,78px);font-size:clamp(17px,1.25vw,24px)}.classroom-lesson .lesson-card>h2{font-size:clamp(21px,1.5vw,29px)}.classroom-lesson .timer-main output{font-size:clamp(68px,10vh,112px)}.classroom-lesson .quick-tasks button{min-height:clamp(55px,7vh,78px)}}
@media(max-width:899px){.classroom-layout{grid-template-columns:1fr}.classroom-lesson .lesson-card{margin:0}.classroom-heading-actions{gap:8px}.classroom-heading-actions .status-pill{font-size:11px}.classroom-heading-actions #new-task{font-size:14px;padding:10px}.classroom-deck .remote-grid button{font-size:15px}.progress-pick{align-items:stretch;flex-direction:column;gap:10px}.recommendation-heading{align-items:flex-start;flex-direction:column;gap:4px}}

/* Fixed right-rail navigation, with optional stage actions below. */
.header-deck-tools{display:flex;gap:8px;margin-right:12px}.teacher-app .header-deck-tools button{min-height:42px;padding:8px 15px;border-radius:12px;font-size:14px;background:#fff9;white-space:nowrap}
.app-view#view-classroom{display:block;height:auto;min-height:0}#view-classroom>.section-heading{margin-bottom:18px}
#view-classroom .remote-layout{display:grid;grid-template-columns:minmax(0,1.9fr) minmax(310px,1fr);align-items:start;gap:24px}
#view-classroom .screen-card{width:100%;max-width:none;margin:0 auto}#view-classroom .preview-caption{font-size:17px;padding:12px 18px}
#view-classroom .remote-controls{display:flex;flex-direction:column;justify-content:flex-start;align-self:start;gap:12px;min-width:0}#view-classroom .remote-grid{grid-template-columns:1fr 1fr;gap:10px}#view-classroom .remote-grid button{min-height:48px;font-size:16px;gap:8px}#view-classroom [data-deck=advance]{grid-column:1/-1;min-height:60px;font-size:21px}
#view-classroom .mode-controls button{min-height:44px;font-size:14px;padding:8px}.stage-controls{display:flex;flex-direction:column;gap:12px}.stage-controls:empty{display:none}
.compact-timer{display:grid;grid-template-columns:minmax(75px,1fr) auto auto auto;align-items:center;gap:9px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px}
.timer-context strong{display:block;font-size:13px;font-weight:550;white-space:nowrap}.timer-context span{display:block;font-size:11px;color:var(--muted);margin-top:2px}.compact-timer output{font-size:34px;letter-spacing:-1px;font-variant-numeric:tabular-nums;line-height:1}
.teacher-app .compact-timer button{min-height:38px;font-size:14px;padding:8px 12px;border-radius:10px}.teacher-app .compact-timer #timer-reset{font-size:23px;width:34px;padding:4px;background:transparent;border:0}
.context-task{padding:16px;background:#e5ede2;border:1px solid #d5dfce;border-radius:16px}.context-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}.context-heading h3{font-size:17px;margin:0}.context-heading .status-pill{font-size:11px;padding:4px 8px;background:#fff9}.teacher-app .context-task>button{min-height:44px;font-size:16px;background:#fff;border:0}.context-results{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:6px}.teacher-app .context-results .text-button{min-height:34px;font-size:13px;padding:4px 0}.context-results strong{font-size:17px}.context-task .progress{height:4px}
@media(min-width:900px) and (min-aspect-ratio:8/5){#view-classroom .remote-layout{grid-template-columns:minmax(0,2fr) minmax(320px,.9fr);gap:clamp(24px,2.6vw,50px)}#view-classroom .screen-card{max-width:calc((100dvh - var(--app-header-h) - var(--app-nav-h) - 95px)*16/9)}#view-classroom .remote-grid button{min-height:clamp(48px,6vh,70px)}#view-classroom [data-deck=advance]{min-height:clamp(58px,7.5vh,90px)}.compact-timer{max-width:430px;width:100%;align-self:center}.context-task{padding:clamp(14px,1.3vw,24px)}.teacher-app .context-task>button{min-height:clamp(44px,5.8vh,62px)}}
@media(max-width:899px){#view-classroom .remote-layout{grid-template-columns:minmax(0,1fr)}#view-classroom .remote-controls{display:flex;flex-direction:column}#view-classroom .remote-grid{grid-row:auto;grid-column:auto}.header-deck-tools{margin-right:4px}.teacher-app .header-deck-tools button{padding:8px 12px}}
@media(max-width:600px){.app-header{height:auto;min-height:112px;display:grid;grid-template-columns:minmax(0,1fr) 44px 44px;gap:6px 3px;padding-bottom:8px}.app-heading{grid-column:1;grid-row:1}.app-header-actions{display:contents}.header-deck-tools{grid-column:1/-1;grid-row:2;margin:0}.header-deck-tools button{flex:1}#join-info{grid-column:2;grid-row:1}#settings-open{grid-column:3;grid-row:1}.compact-timer{max-width:none}.progress-pick{align-items:stretch;flex-direction:column;gap:10px}.recommendation-heading{align-items:flex-start;flex-direction:column;gap:4px}}

.video-controls{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px}.video-controls h3{margin:0 0 12px;font-size:17px}.video-buttons{display:flex;gap:8px}.teacher-app .video-buttons button{flex:1;min-height:44px;padding:8px;font-size:14px}.video-controls p{font-size:13px;color:var(--muted);margin:12px 0 0;line-height:1.7}

/* Compact single sidebar replaces the header and bottom navigation. */
.teacher-app{--sidebar-width:76px;--app-header-h:0px;--app-nav-h:0px}
.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip-path:inset(50%)!important;white-space:nowrap!important;border:0!important}
.teacher-app .tablet-app{display:block;max-width:none;min-height:0;height:100dvh;padding:0 0 0 var(--sidebar-width);overflow:hidden}
.teacher-app .app-content{height:100%;min-height:0;overflow:auto;overscroll-behavior:contain;padding:22px clamp(20px,2.4vw,44px)}
.teacher-app .app-view{max-width:none;margin:0}.teacher-app .app-view#view-results{padding-bottom:105px}
.app-sidebar{position:fixed;inset:0 auto 0 0;width:var(--sidebar-width);padding:12px 7px;display:flex;flex-direction:column;align-items:stretch;gap:7px;background:#fffffff5;border-right:1px solid var(--line);z-index:30;overflow-y:auto;overscroll-behavior:contain}
.app-sidebar .app-heading{height:42px;justify-content:center;flex-shrink:0}.app-sidebar .app-mark{font-size:33px}.app-sidebar .connection{display:flex;justify-content:center;align-items:center;width:100%;height:14px;min-height:14px}.app-sidebar .dot{margin:0}
.sidebar-main,.sidebar-tools,.sidebar-bottom{display:flex;flex-direction:column;gap:5px}.sidebar-tools{border-top:1px solid var(--line);padding-top:9px;margin-top:3px}.sidebar-bottom{margin-top:auto;padding-top:14px}
.teacher-app .sidebar-button{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:100%;min-width:0;min-height:54px;padding:7px 2px;border:0;border-radius:12px;background:transparent;color:#6c786a;font-size:12px;line-height:1.2;font-weight:550;white-space:nowrap}
.teacher-app .sidebar-button.active{background:var(--light);color:var(--green)}.sidebar-button svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}.sidebar-button i{position:absolute;top:7px;right:10px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.teacher-app .selection-dock{bottom:0;left:var(--sidebar-width);right:0;max-width:none;padding:14px clamp(20px,2.4vw,44px)}.teacher-app .toast{bottom:22px;left:calc(50% + var(--sidebar-width)/2)}
.teacher-app #view-classroom .screen-card{max-width:calc((100dvh - 90px - var(--script-reserved,0px) - 8px)*16/9)}
@media(max-width:899px){.teacher-app{--sidebar-width:70px}.teacher-app .app-content{padding:18px 20px}}
@media(max-width:600px){.teacher-app{--sidebar-width:60px}.teacher-app .app-content{padding:12px}.app-sidebar{padding:8px 4px;gap:5px}.teacher-app .sidebar-button{min-height:50px;font-size:11px}.app-sidebar .app-heading{height:34px}.app-sidebar .app-mark{font-size:28px}.teacher-app .selection-dock{padding:10px 12px;gap:6px}.selection-dock>button{min-width:0!important}.selection-dock>div>span{font-size:12px}}
.group-summary{margin-top:20px}.group-summary-heading{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 20px;margin-bottom:14px}.group-summary-heading h3{font-size:20px;margin:0}.group-summary-heading p{font-size:14px;color:var(--muted);margin:0}.group-summary .group-results-table th:first-child{width:58%}.group-summary .group-results-table th:nth-child(2){width:10%}.group-summary .group-results-table th:last-child{width:104px}.group-summary .empty{padding:70px 24px;text-align:center;background:white;border-radius:16px}.group-reason{padding:16px 0;border-bottom:1px solid var(--line)}.group-reason h3{font-size:20px;color:var(--green)}.selection-dock .group-projection-pages{display:flex;align-items:center;gap:10px;margin:0}.group-projection-pages span{white-space:nowrap;font-variant-numeric:tabular-nums;font-size:15px}.teacher-app .group-projection-pages button{padding:8px 14px;min-width:44px}.group-summary .answer-count small{font-size:14px}@media(max-width:900px){.group-summary .group-results-table{min-width:700px}.group-summary .group-results-table th,.group-summary .group-results-table td{padding:12px}.selection-dock:has(#group-projection-pages:not([hidden]))>div:first-child{display:none}}
@media(max-width:900px){.group-summary .group-results-table{min-width:680px}.group-summary .answer-sequence{gap:6px}.group-summary .answer-sequence{font-size:15px}.group-summary .sequence-arrow{font-size:16px}}

/* 课堂逐字稿面板：跟随当前 PPT 页显示，保留原稿颜色区分。 */
.script-panel{--script-h:0px;background:var(--paper);border:1px solid var(--line);border-radius:20px;overflow:hidden;margin-top:18px}
.script-panel.is-open{--script-h:clamp(150px,26vh,290px)}
.script-head{display:flex;align-items:center;gap:12px;padding:13px 20px;border-bottom:1px solid var(--line);background:#f2f4ea;flex-wrap:wrap}
.script-head h2{margin:0;font-size:17px;flex:0 0 auto}
.script-sub{font-size:15px;color:var(--muted);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.script-page{font-size:12px;color:var(--muted);background:#fff;border:1px solid var(--line);border-radius:999px;padding:3px 10px;flex:0 0 auto}
.script-tools{margin-left:auto;display:flex;gap:8px;flex:0 0 auto}
.teacher-app .script-tools button{min-height:36px;padding:6px 13px;border-radius:10px;font-size:13px;background:#fff}
.teacher-app .script-tools button[aria-pressed=true]{background:var(--green);border-color:var(--green);color:#fff}
.script-font{min-width:40px;font-weight:700}
.script-legend{display:flex;flex-wrap:wrap;gap:6px 18px;padding:10px 20px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.script-legend span{display:inline-flex;align-items:center;gap:6px}
.script-legend i{width:11px;height:11px;border-radius:3px;display:block}
.script-body{height:0;overflow:hidden;transition:height .18s ease}
.script-panel.is-open .script-body{height:var(--script-h);overflow:auto;overscroll-behavior:contain;padding:12px 20px 16px}
.script-line{margin:0 0 9px;font-size:16px;line-height:1.62;padding:7px 12px;border-radius:9px;border-left:4px solid transparent;background:#fbfcf8;overflow-wrap:anywhere}
.script-line:last-child{margin-bottom:0}
.script-line.r-teacher{color:#c0392b;border-left-color:#c0392b;background:#fdf3f1;font-weight:520}
.script-line.r-student{color:#263b35;border-left-color:#b9c2b4;background:#f4f6f0}
.script-line.r-praise{color:#1d7a45;border-left-color:#1d7a45;background:#f0f8f2}
.script-line.r-cue{color:#7a827a;border-left-color:#cfd5c8;background:#f7f8f4;font-style:italic}
.script-line.r-group{color:#28594b;background:#eaf0e6;border-left-color:#28594b;font-weight:650;font-size:14px;margin-top:14px;letter-spacing:.02em}
.script-line.r-group:first-child{margin-top:0}
.script-empty{margin:0;font-size:14px;color:var(--muted)}
.script-resize{height:10px;margin-top:-4px;cursor:ns-resize;display:flex;align-items:center;justify-content:center;touch-action:none}
.script-resize::after{content:"";width:52px;height:4px;border-radius:2px;background:#d6dccd}
.script-resize:hover::after{background:var(--green)}
.script-resize:focus-visible::after{background:var(--green);outline:2px solid var(--green);outline-offset:2px}
@media(max-width:899px){.script-head{padding:12px 16px;gap:9px}.script-legend{padding:9px 16px}.script-panel.is-open .script-body{padding:11px 16px 14px}.script-line{font-size:15px}}
@media(max-width:600px){.script-sub{display:none}.script-tools{width:100%;margin-left:0}.teacher-app .script-tools button{flex:1}.script-font{flex:0 0 44px}}