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@media(min-width:1700px){.workbench{grid-template-columns:218px minmax(0,1fr) 310px;gap:20px}.component-panel{padding:22px 18px}.palette-item{min-height:74px}.palette-item .component-mini{width:62px;height:57px}.component-mini svg{width:55px;height:55px}.palette-item strong{font-size:13px}.palette-item small{font-size:9px}.question-panel{padding:23px}.question-prompt{font-size:12px}.question-body h3{font-size:21px}.question-actions .button{height:40px}.feature-list li{font-size:11px}.canvas-toolbar{height:64px;min-height:64px}}
@media(max-width:1240px){.app-header{padding:0 24px;gap:25px}.main-nav{gap:17px}main{padding:22px 18px 0}.workbench{grid-template-columns:174px minmax(0,1fr) 240px;gap:12px}.component-panel{padding:18px 9px}.palette-item{gap:7px;padding-left:4px;padding-right:4px}.palette-item .component-mini{width:48px}.palette-item small{font-size:7px}.question-panel{padding:18px 14px}.canvas-toolbar{padding:0 10px}.canvas-options{gap:7px}.check-label{font-size:9px}.edit-tools .text-button{font-size:9px}.view-control button{padding:5px 7px}.footer-hint{display:none}.workspace-footer>.text-button{margin-left:auto}h1>span{display:none}.question-body h3{font-size:17px}.brand small{letter-spacing:1px}}
@media(max-width:1050px){.app-header{height:76px}.main-nav{gap:14px}.main-nav button{font-size:11px}.brand strong{font-size:18px}.brand>svg{width:36px;height:36px}.brand small{font-size:8px}.mode-control button{padding:6px 9px;font-size:10px}.workbench{grid-template-columns:150px minmax(0,1fr) 220px;gap:10px;height:calc(100dvh - 237px)}.palette-item{flex-direction:column;gap:3px;text-align:center;min-height:74px}.palette-item .component-info{gap:1px}.palette-item .component-mini{height:38px;width:78px}.component-mini svg{height:37px;width:54px}.palette-item strong{font-size:10px}.palette-item small{display:none}.palette{gap:1px;margin-top:12px}.palette-foot{font-size:8px}.canvas-options{display:none}.canvas-caption{font-size:8px;left:14px}.canvas-hint{font-size:7px;padding:5px;gap:4px}.question-panel{padding:18px 12px}.question-prompt{font-size:10px}.question-actions .button{font-size:10px}.question-tags{gap:4px}.tag{font-size:8px}.workspace-heading{margin-bottom:18px}h1{font-size:23px}}
@media(max-width:850px){.app-header{height:auto;min-height:72px;padding:15px 18px;flex-wrap:wrap;gap:14px}.brand{margin-right:auto}.main-nav{order:3;width:100%;height:30px;gap:25px}.main-nav button{font-size:12px}.mode-control{margin-left:0}.workspace-heading{align-items:flex-start}.heading-actions{gap:5px}.heading-actions .button{padding:0 9px;font-size:10px;height:33px}.heading-actions .button .icon{width:13px}.workbench{grid-template-columns:115px minmax(0,1fr);height:auto;min-height:0;gap:12px}.component-panel{grid-column:1;grid-row:1;padding:16px 8px;max-height:670px}.drawing-panel{grid-column:2;grid-row:1;height:670px}.question-panel{grid-column:1/-1;grid-row:2;display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:20px;padding:20px}.question-panel>.panel-title{grid-column:1/-1;padding-bottom:12px}.question-body{padding-top:0;display:grid;grid-template-columns:1fr 1fr;column-gap:30px}.question-number{grid-column:1;margin-bottom:9px}.question-body h3{grid-column:1;font-size:19px}.question-prompt{grid-column:1;font-size:12px}.question-tags{grid-column:1;margin-top:12px}.question-rule,.feature-list,.task-label{display:none}.question-actions{grid-column:2;grid-row:1/6;align-self:center}.question-actions .button{font-size:12px;height:38px}.practice-note{font-size:10px}.check-result{grid-column:1/-1}.question-panel:has(.inspector:empty){display:block}.question-panel:has(.inspector:empty) .panel-title{margin-bottom:16px}.inspector{margin:0;padding-top:0;padding-left:20px;border-top:0;border-left:1px solid var(--line)}.panel-description{font-size:9px}.canvas-options{display:flex}.workspace-footer{font-size:9px;gap:12px}.canvas-hint{font-size:9px}.palette-foot{display:none}.question-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.library-dialog{width:calc(100vw - 32px)}.dialog-heading h2{font-size:22px}}
@media(max-width:560px){main{padding:17px 10px 0}.app-header{padding:13px}.brand{gap:8px}.brand strong{font-size:17px}.brand small{font-size:8px}.brand>svg{width:34px;height:34px}.mode-control{padding:3px}.mode-control button{font-size:10px;padding:7px 8px}.main-nav{gap:22px;margin-top:2px;height:26px}.workspace-heading{gap:12px;flex-wrap:wrap;margin-bottom:14px}.eyebrow{font-size:8px}h1{font-size:23px;margin-top:4px}.heading-actions{width:100%;justify-content:flex-end}.heading-actions .button{font-size:11px;padding:0 10px}.workbench{display:flex;flex-direction:column;gap:12px}.component-panel{order:1;padding:12px;overflow:visible}.component-panel .panel-title{margin-bottom:9px}.panel-description{display:none}.palette{display:flex;flex-direction:row;overflow:auto;margin:0;gap:6px;padding:0 0 4px}.palette-item{min-width:76px;width:76px;padding:6px 5px;flex-shrink:0;min-height:74px;background:#f8faf3;border-color:#e6ebdd}.palette-item .component-mini{width:60px;height:42px;background:transparent}.palette-item strong{font-size:10px}.drawing-panel{order:2;height:530px;flex-shrink:0}.canvas-toolbar{min-height:52px;height:52px;padding:0 12px}.canvas-caption{font-size:8px;top:14px}.canvas-hint{font-size:8px;bottom:12px;max-width:95%;white-space:normal;width:max-content;line-height:1.6}.canvas-bottom{padding:0 9px}.canvas-options{gap:7px}.canvas-options .check-label{font-size:8px}.question-panel{order:3;display:block!important;padding:17px}.question-panel .panel-title{margin-bottom:15px}.question-body{display:block}.question-prompt{font-size:12px}.question-body h3{font-size:20px}.question-tags{margin-top:14px}.question-actions{margin-top:20px}.question-actions .button{font-size:12px}.inspector{border-left:0;border-top:1px solid var(--line);padding:16px 0 0;margin-top:20px}.workspace-footer{flex-wrap:wrap;gap:7px 14px;padding:10px 3px;min-height:50px}.workspace-footer .text-button{font-size:9px}.question-grid{grid-template-columns:1fr}.question-card-preview{height:160px}.library-dialog{width:calc(100vw - 20px)}dialog{padding:20px 17px;max-height:93dvh;border-radius:13px}.dialog-heading h2{font-size:20px}.dialog-heading p{font-size:10px;line-height:1.8}.dialog-heading{gap:7px}.dialog-footer{flex-wrap:wrap}.dialog-footer>span{width:100%;margin:0 0 5px}.library-tools{flex-wrap:wrap}.search-field{width:100%}.form-row{gap:10px}.form-row .field:first-child{width:90px}.help-steps{gap:21px}.help-steps li{gap:12px}.help-steps p{font-size:11px}.reference-banner{gap:8px;font-size:9px}.reference-banner button{font-size:9px}}
@media(min-width:851px) and (max-height:850px){.workbench{min-height:420px}#circuit-canvas{min-height:0}.component-panel{padding-top:14px}.palette{margin-top:12px;gap:2px}.palette-item{min-height:52px}.palette-item .component-mini{height:44px}.component-mini svg{height:42px}.palette-foot{display:none}.question-body{padding-top:16px}.question-rule,.task-label,.feature-list,.practice-note{display:none}.question-actions{margin-top:18px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
/* Draft tools form a separate, personal annotation layer. */
.draft-toolbar{display:flex;align-items:center;gap:5px;flex-wrap:wrap;padding:8px 16px;background:#f7f9f4;border-bottom:1px solid #e2e8dc;font-size:12px;color:#617366}
.draft-toolbar>span{margin-right:auto}.draft-toolbar button{border:1px solid transparent;background:transparent;padding:6px 8px;border-radius:7px;color:inherit;cursor:pointer;font:inherit}.draft-toolbar button[aria-pressed=true]{background:#e2ecdc;color:#245b49;border-color:#c4d5bd}.draft-tool-active{cursor:crosshair!important}.draft-tool-active *{cursor:crosshair!important}.canvas-extra-tools{display:flex;gap:6px}
@media(max-width:700px){.draft-toolbar{padding:6px 8px}.draft-toolbar>span{width:100%}.canvas-toolbar{flex-wrap:wrap;gap:8px}.canvas-extra-tools{margin-left:auto}}
.flow-status{padding:10px 16px;border-bottom:1px solid #d6e3d1;background:#eff5e9;color:#39604c;font-size:13px;line-height:1.6}.flow-status[data-status=short]{color:#9c3d2c;background:#fff1e9}.current-flow{stroke:#ce932f;stroke-width:4;stroke-dasharray:7 18;fill:none;stroke-linecap:round;animation:current-travel 1s linear infinite}@keyframes current-travel{to{stroke-dashoffset:-50}}@media(prefers-reduced-motion:reduce){.current-flow{animation:none}}
.canvas-zoom{display:flex;align-items:center;border:1px solid #e0e7d8;border-radius:8px;overflow:hidden}.canvas-zoom button{font-size:12px;color:#647a5e;min-width:26px;height:28px;padding:0 5px;cursor:pointer}.canvas-zoom button:hover{background:#edf4e6}#canvas-zoom-label{font-size:10px;min-width:38px}.canvas-extra-tools{align-items:center;flex-wrap:wrap}.canvas-toolbar{height:auto;min-height:58px;padding-top:8px;padding-bottom:8px;flex-shrink:0}.main-nav button{flex-shrink:0}#classroom-identity{max-width:110px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.draft-toolbar{flex-shrink:0}.flow-status{flex-shrink:0}
@media(max-width:850px){#circuit-canvas{min-height:0}.main-nav{overflow-x:auto;gap:18px;white-space:nowrap;flex-shrink:0}.main-nav::-webkit-scrollbar{height:2px}.canvas-toolbar{min-height:58px;height:auto;gap:5px}.canvas-bottom{flex-wrap:wrap;padding:6px 9px}.canvas-extra-tools{gap:3px}.canvas-extra-tools .button{padding:0 7px}.drawing-task-active .drawing-panel{height:580px;min-height:580px}}