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.stamp{min-height:120px}.toast{position:fixed;bottom:25px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;z-index:60;background:#244b3d;color:#fff;border-radius:9px;padding:13px 21px;box-shadow:0 8px 30px #233f3425;transition:all .2s;font-size:15px;max-width:90%;text-align:center}.toast.show{opacity:1;transform:translate(-50%,0)}.empty-task{min-height:350px;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;padding:35px;gap:10px}.empty-task .placeholder-icon{height:70px;width:70px;background:#edf3e0;color:#91a56e;display:grid;place-items:center;border-radius:22px;margin-bottom:7px}.placeholder-icon svg{height:33px;width:33px}.empty-task h2{font-size:24px;margin:7px 0}.empty-task p{font-size:15px;line-height:1.9;color:#718164;max-width:390px;margin:0 0 12px}.release-strip{display:flex;gap:12px;align-items:center}.locked-notice{background:#f5f3e9;color:#9b9378;padding:10px 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.secondary{flex:1}.empty-table{text-align:center;padding:28px;color:#a4ad97}.teacher-notice{margin-top:17px;border:1px solid #e3e9d8;background:#f4f7ee;padding:15px 18px;border-radius:9px;font-size:15px;line-height:1.9;color:#8b9b7c}.pagination-note{margin-top:7px;color:#718066;font-size:13px;text-align:right}.face-key{display:flex;align-items:center;gap:5px;font-size:14px;margin-top:9px;color:#91a079}.face-key span{height:6px;width:6px;background:#b4ca8f;border-radius:50%}@keyframes appear{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1500px){main{padding-top:45px}.workspace-body{min-height:410px}.cube-stage{min-height:300px}.stamps{min-height:160px}.task-item{min-height:83px}.lesson-heading{margin-bottom:34px}.teacher-overview{margin-top:30px}}
@media(max-width:1100px){.task-item{padding:12px 10px;gap:8px}.task-item .step-num{width:28px;height:30px;font-size:16px}.task-item h3{font-size:15px}.task-item p{font-size:13px}.task-nav{gap:7px}.print-pane{padding:23px 18px 18px}.stamps{gap:7px}.workspace-body{grid-template-columns:1.05fr 1fr}.class-details{grid-template-columns:.9fr 1.5fr}}
@media(max-width:820px){.topbar{height:74px;padding:0 4%;gap:10px}.lesson-label{display:none}.brand{font-size:18px;gap:8px}.brand small{font-size:12px;letter-spacing:2px}.brand-icon{width:34px;height:36px}.header-actions{gap:12px}.role-switch button{padding:8px 12px}main{padding:26px 4% 0}h1{font-size:32px}.class-tag{font-size:14px}.lesson-heading p{font-size:15px}.task-nav{grid-template-columns:repeat(3,1fr);gap:8px}.task-item{min-height:63px;padding:11px 14px}.task-item .step-num{width:31px;height:31px}.workspace-body{grid-template-columns:1fr 1fr;min-height:330px}.cube-pane{margin:12px 0 12px 12px}.cube-stage{height:240px;min-height:230px}.workspace-title h2{font-size:17px}.workspace-header{padding:18px}.stamps{grid-template-columns:1fr;gap:6px;min-height:0}.stamp{min-height:55px;flex-direction:row;gap:12px;justify-content:flex-start;padding:7px 12px}.stamp-drawing{height:37px;width:72px}.stamp.empty{flex-direction:row;justify-content:center;gap:9px}.stamp.empty .empty-plus{font-size:20px}.stamp-remove{right:4px;top:calc(50% - 11px)}.stamp-shape{max-height:35px;max-width:60px}.instruction{margin:10px 0 13px;font-size:14px}.print-pane{padding:19px 17px 15px}.print-actions{margin-top:14px}.primary{padding:9px 13px;font-size:15px}.stat-grid{gap:9px}.stat-card{padding:14px}.stat-number b{font-size:28px}.stat-label{font-size:13px}.stat-foot{font-size:12px}.class-details{grid-template-columns:1fr}.distribution{display:none}.modal .stamps{grid-template-columns:repeat(3,1fr)}.modal .stamp{flex-direction:column;padding:15px 5px;justify-content:center}.modal .stamp-drawing{height:65px;width:80%}.evaluation{padding:21px;gap:20px}.stars{gap:1px}.stars button{font-size:30px}}
@media(max-width:560px){.topbar{height:69px}.avatar{display:none}.brand{font-size:17px}.brand small{font-size:11px}.role-switch button{font-size:14px;padding:8px 10px}main{padding-top:22px}.lesson-heading{align-items:flex-start;gap:10px;margin-bottom:21px}.eyebrow{font-size:13px;letter-spacing:1px}h1{font-size:28px;letter-spacing:1px;margin-top:9px}.title-spark{font-size:24px;margin-left:9px}.lesson-heading p{font-size:14px;max-width:215px;line-height:1.8}.class-meta{gap:8px;margin-top:20px}.class-tag{padding:7px;font-size:13px;gap:4px}.class-tag svg{display:none}.session-note{font-size:12px;gap:4px}.task-nav{gap:6px;margin-bottom:17px}.task-item{padding:10px;min-height:58px;gap:8px;border-radius:9px}.task-item h3{font-size:15px}.task-item p{font-size:12px}.task-item .step-num{width:24px;height:27px;font-size:15px}.step-status{top:5px;right:5px}.step-status svg{width:9px;height:9px}.workspace-header{align-items:flex-start;padding:15px;gap:8px}.workspace-title{gap:7px;align-items:flex-start}.workspace-title h2{font-size:15px;line-height:1.6}.task-label{font-size:12px;padding:4px 5px;margin-top:2px}.small-tag{font-size:12px;padding:5px}.workspace-body{grid-template-columns:1fr}.cube-pane{margin:12px 12px 0}.cube-stage{min-height:235px;height:235px}.print-pane{padding:20px 16px}.stamps{grid-template-columns:repeat(3,1fr);gap:7px;min-height:125px}.stamp{flex-direction:column;justify-content:center;padding:12px 3px;gap:12px}.stamp.empty{flex-direction:column;gap:12px}.stamp-drawing{width:85%;height:57px}.stamp-shape{max-height:57px;max-width:90px}.stamp-remove{top:3px;right:3px}.print-actions{margin-top:18px}.workspace-footer{font-size:13px;padding:11px 15px;flex-wrap:wrap}.teacher-overview{margin-top:22px}.section-heading h2{font-size:15px;gap:6px}.section-heading h2 small{font-size:12px}.overview-actions{gap:9px}.overview-actions .text-button{font-size:13px}.stat-grid{grid-template-columns:1fr 1fr;gap:9px}.stat-card{padding:13px 15px}.stat-number{margin:10px 0 7px}.stat-number b{font-size:30px}.stat-foot{font-size:13px}.stat-label{font-size:14px}.student-list{padding:16px 12px}.panel-title small{font-size:12px}.list-filter button{padding:4px 6px}td,th{font-size:13px}.student-list td:nth-child(3),.student-list th:nth-child(3){display:none}footer{font-size:12px;margin:20px 0;align-items:flex-start}footer button{font-size:12px;max-width:150px}.evaluation{grid-template-columns:1fr;padding:17px;gap:10px}.evaluation .primary{width:100%}.self-review{padding:18px}.review-result{padding:10px 5px}.modal{padding:24px}.modal h2{font-size:23px}.modal-actions{gap:7px}.release-strip{gap:6px}.release-strip .primary{font-size:13px;padding:6px 8px}.released-chip{font-size:12px}.class-details{margin-top:12px}.empty-task{min-height:320px;padding:25px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
.ai-error{color:#ac714b!important;background:#faf0e5;padding:12px 14px;border-radius:7px;font-size:15px!important}.stars button:disabled{opacity:.6}@media(pointer:coarse){.cube-controls button{min-height:44px;min-width:44px}.cube-hint{bottom:77px}.stamp-remove{width:30px;height:30px}.stars button{min-width:40px;min-height:44px}.review-chips button{min-height:40px}}
.decorative-stars span{font-size:36px;line-height:1;padding:4px;color:#d9dfc9}.decorative-stars span.chosen{color:#d6a655}

/* Comfortable classroom type: 14–15px body and 16px action buttons. */
body{font-size:15px;line-height:1.6}
.topbar{min-height:88px;height:auto;padding-top:13px;padding-bottom:13px}
.brand{font-size:21px}.brand small{font-size:11px;letter-spacing:2.4px}
.lesson-label,.class-tag,.session-note{font-size:14px}
.role-switch button{font-size:16px;min-height:40px}.lesson-heading p{font-size:15px;line-height:1.8}
.task-item{min-height:84px}.task-item h3{font-size:16px;line-height:1.45}.task-item p{font-size:14px;line-height:1.5;white-space:normal}.task-item:disabled{opacity:.7}
.workspace-header{flex-wrap:wrap;row-gap:10px}.workspace-title{min-width:0}.workspace-title h2{font-size:20px;line-height:1.6}
.task-label,.small-tag,.released-chip{font-size:14px}.release-strip .primary{font-size:16px;min-height:40px}
.pane-kicker,.orbit-note,.cube-hint{font-size:14px}.orbit-note{letter-spacing:.5px}.cube-stage text{font-size:16px}
.cube-controls button{font-size:14px;min-height:40px;min-width:40px}.cube-hint{bottom:73px}
.print-pane-heading h3{font-size:18px}.print-count{font-size:15px}.print-count b{font-size:22px}
.instruction{font-size:15px;line-height:1.85;margin:14px 0 21px;color:#68785e}
.stamp small,.stamp.empty small{font-size:14px;letter-spacing:.5px}
.primary,.secondary{font-size:16px;min-height:44px}.quiet-button{font-size:14px;min-height:40px}
.workspace-footer,.workspace-footer button{font-size:14px;line-height:1.7}.workspace-footer{flex-wrap:wrap;padding:13px 25px}
.section-heading{flex-wrap:wrap;row-gap:10px}.section-heading h2{font-size:20px}.section-heading h2 small{font-size:13px}.text-button{font-size:14px;min-height:36px}
.stat-label{font-size:14px}.stat-number b{font-size:32px}.stat-number span,.stat-foot{font-size:13px}.stat-foot{line-height:1.8}
.panel-title{flex-wrap:wrap}.panel-title h3{font-size:16px}.panel-title small{font-size:13px}
.distribution-row{font-size:14px;grid-template-columns:100px 1fr 36px;gap:8px}.distribution-row b{font-size:14px}.distribution-note{font-size:14px;line-height:1.85}
.student-list{min-width:0;overflow-x:auto}.list-filter button{font-size:14px;min-height:34px;padding:5px 8px}
table,td{font-size:14px;line-height:1.7}th{font-size:13px}.status-pill,.row-link{font-size:14px}.row-link{min-height:32px;white-space:nowrap}.pagination-note{font-size:13px;line-height:1.8}
footer,footer button{font-size:13px;line-height:1.8}
.modal p,.modal label{font-size:15px}.modal input{font-size:16px;min-height:46px}.modal-note,.modal-error{font-size:14px!important}.report-limit{font-size:13px!important}.ai-error{font-size:14px!important}
.self-review p,.review-result p{font-size:15px;line-height:1.95}.self-review h3,.review-result h3{font-size:21px}.review-chips button{font-size:14px;min-height:40px}.report-badge{font-size:14px}
.detail-grid small{font-size:14px}.detail-grid b{font-size:16px}.empty-task p{font-size:15px}.locked-notice{font-size:15px}
@media(max-width:1000px){.task-nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}.class-details{grid-template-columns:1fr}.distribution{display:block}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:820px){.brand{font-size:20px}.brand small{font-size:10px}.role-switch button{font-size:16px}.task-item h3{font-size:16px}.task-item p{font-size:14px}.workspace-title h2{font-size:20px}.instruction{font-size:15px}.primary,.secondary{font-size:16px}.cube-stage{min-height:265px}.stamp,.stamp.empty{min-height:70px}.stamp-drawing{height:45px;width:80px}.stat-label{font-size:14px}.stat-foot{font-size:13px}.student-list table{min-width:500px}.evaluation{grid-template-columns:1fr}}
@media(max-width:700px){.workspace-body{grid-template-columns:1fr}.cube-pane{margin:14px 14px 0}.cube-stage{min-height:280px;height:280px}.stamps{grid-template-columns:repeat(3,minmax(0,1fr));min-height:140px;gap:9px}.stamp,.stamp.empty{flex-direction:column;justify-content:center;padding:14px 5px;min-height:140px}.stamp-drawing{height:65px;width:90%}.stamp-remove{top:4px;right:4px}}
@media(max-width:560px){
 .topbar{padding:12px 4%;gap:8px}.brand{font-size:17px}.brand small{font-size:10px;letter-spacing:1.8px}.brand-icon{width:30px;height:34px}.header-actions{gap:0}.role-switch button{font-size:15px;padding:7px 10px}
 .lesson-heading{flex-direction:column;gap:13px}.lesson-heading p{max-width:none;font-size:15px}.class-meta{margin-top:0;flex-direction:row;align-items:flex-start;flex-wrap:wrap;gap:9px}.class-tag,.session-note{font-size:13px}h1{font-size:30px}.eyebrow{font-size:13px}
 .task-nav{grid-template-columns:repeat(2,minmax(0,1fr))}.task-item{min-height:80px;padding:11px 10px}.task-item h3{font-size:16px}.task-item p{font-size:13px}.task-item .step-num{font-size:18px;width:29px;height:33px}
 .workspace-title{flex-wrap:wrap;gap:8px}.workspace-title h2{font-size:20px}.task-label,.small-tag,.released-chip{font-size:13px}.release-strip .primary{font-size:16px}
 .pane-kicker,.orbit-note{font-size:13px}.cube-hint{font-size:14px}.cube-controls{gap:6px}.cube-controls button{font-size:14px;padding:7px}.cube-controls .control-divider{margin:0}
 .print-pane-heading h3{font-size:18px}.print-count{font-size:15px}.instruction{font-size:15px}.stamp small,.stamp.empty small{font-size:14px}.workspace-footer,.workspace-footer button{font-size:14px}
 .section-heading h2{font-size:20px}.section-heading h2 small{font-size:12px}.overview-actions{gap:15px;flex-wrap:wrap}.overview-actions .text-button{font-size:14px}
 .stat-label{font-size:14px}.stat-number b{font-size:32px}.stat-foot,.stat-number span{font-size:13px}.panel-title h3{font-size:16px}.panel-title small{font-size:12px}
 .list-filter button{font-size:14px}.student-list td:nth-child(3),.student-list th:nth-child(3){display:table-cell}td{font-size:14px}th{font-size:13px}.pagination-note{font-size:13px}
 footer{flex-direction:column;align-items:flex-start;gap:8px}footer,footer button{font-size:13px}footer button{max-width:none}
 .modal h2{font-size:25px}.modal p,.modal label{font-size:15px}.modal-note{font-size:14px!important}.review-chips button{font-size:14px}.report-limit{font-size:13px!important}
}