:root{color-scheme:light;--blue:#2458f5;--blue-dark:#1945c7;--blue-pale:#edf2ff;--paper:#f6f8fd;--ink:#192b48;--muted:#68778f;--line:#dce3ef;--white:#fff;--warm:#ffad66;--danger:#a74235;font-family:DengXian,'Microsoft YaHei','PingFang SC',sans-serif;color:var(--ink);background:var(--paper);font-size:14px}
*{box-sizing:border-box}body{margin:0;height:100vh;height:100dvh;display:flex;flex-direction:column;overflow:hidden}button,input,select{font:inherit}button,summary,select,input[type=range]{cursor:pointer}button{min-height:44px;padding:8px 12px;border:0;border-radius:6px;color:var(--ink);background:transparent;font-weight:600}button:hover:not(:disabled){background:var(--blue-pale)}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--warm);outline-offset:2px}[hidden]{display:none!important}button,summary{-webkit-tap-highlight-color:transparent}input,select{color:var(--ink)}input[type=number],input[type=text],select{min-height:44px;border:1px solid var(--line);border-radius:6px;background:white;padding:7px 9px;min-width:0}input[type=number]{appearance:textfield;-moz-appearance:textfield}input::-webkit-inner-spin-button,input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}input[type=range]{accent-color:var(--blue);min-width:0;min-height:44px;margin:0}input[type=checkbox]{width:18px;height:18px;accent-color:var(--blue)}input::placeholder{font-size:11px;color:#8b98aa}.icon{width:18px;height:18px;display:block}i[data-icon]{display:inline-flex;font-style:normal}.icon-button{width:44px;min-width:44px;display:inline-flex;justify-content:center;align-items:center;padding:10px;color:var(--muted);font-size:22px;font-weight:400}.quiet-button{color:var(--muted);font-size:12px}.outline-button{border:1px solid var(--line);background:white}.primary-button{background:var(--blue);color:white}.primary-button:hover:not(:disabled){background:var(--blue-dark)}.text-button{min-height:24px;padding:1px 5px;font-size:10px;color:var(--blue)}h1,h2,h3,p{margin:0}h2{font-size:16px}h3{font-size:13px;margin-top:18px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.app-header{display:flex;align-items:center;gap:24px;background:white;border-bottom:1px solid var(--line);min-height:52px;padding:0 14px;flex-shrink:0}.brand{display:flex;align-items:center;gap:8px;white-space:nowrap}.brand h1{font-size:16px;font-weight:650;letter-spacing:.3px}.brand h1 span{margin-left:4px;font-weight:400;color:var(--muted);font-size:12px}.task-tabs{display:flex;gap:3px}.task-tabs button{font-size:13px;color:var(--muted);padding:8px 18px}.task-tabs button[aria-selected=true]{background:var(--blue-pale);color:var(--blue)}.header-actions{margin-left:auto;display:flex;gap:1px}.view-toolbar{display:flex;gap:10px;align-items:center;min-height:48px;padding:2px 14px;border-bottom:1px solid var(--line);background:white;z-index:10;flex-shrink:0}.view-tabs{display:flex;gap:4px}.view-tabs button{padding:8px 20px;color:var(--muted);font-size:13px}.view-tabs button[aria-selected=true]{color:var(--blue);background:var(--blue-pale)}.inline-tools{display:flex;border-left:1px solid var(--line);padding-left:10px;gap:2px}.inline-tools button[aria-pressed=true]{color:var(--blue);background:var(--blue-pale)}.line-icon{font-size:25px}.history-tools{display:flex;gap:0;margin-left:auto}.more-tools{position:relative}.more-tools>summary{display:flex;align-items:center;justify-content:center;list-style:none;width:44px;height:44px;font-size:24px;color:var(--muted);cursor:pointer}.more-tools>summary::-webkit-details-marker{display:none}.menu-panel{position:absolute;top:48px;right:0;min-width:210px;background:white;border:1px solid var(--line);box-shadow:0 10px 34px #192b4824;border-radius:9px;padding:5px;z-index:45}.menu-panel button{display:flex;align-items:center;gap:8px;width:100%;text-align:left;font-size:12px;font-weight:400}
.workspace{flex:1;display:grid;grid-template-columns:minmax(0,1fr) 360px;min-height:0}.main-display{min-height:0;min-width:0;background:#fbfcfe;position:relative;overflow:hidden}.measurement-view{height:100%;display:flex;flex-direction:column;min-height:0}.experiment-context{display:flex;align-items:center;gap:16px;padding:4px 14px;background:white;border-bottom:1px solid var(--line);min-height:52px;flex-shrink:0}.known-resistance{display:flex;align-items:center;gap:8px;white-space:nowrap}.known-resistance label{font-size:12px;color:var(--muted)}.known-resistance select{width:92px;font-family:Consolas,monospace;font-weight:600}.target-control{display:flex;align-items:center;gap:5px;font-size:12px;white-space:nowrap}.target-control input{width:64px}.task-note{font-size:12px;color:var(--muted);line-height:1.6}.focus-tabs{display:flex;margin-left:auto;white-space:nowrap;background:var(--paper);border-radius:6px}.focus-tabs button{font-size:12px;padding:8px 13px;color:var(--muted)}.focus-tabs button[aria-pressed=true]{background:var(--blue-pale);color:var(--blue)}.circuit-focus{position:relative;flex:1;min-height:0;overflow:hidden}.bench-container{height:100%;width:100%;touch-action:none;overflow:hidden;outline-offset:-4px}.bench-container .bench-svg{height:100%!important;width:100%!important;user-select:none;touch-action:none}.bench-container[data-tool=pan]{cursor:grab}.bench-container[data-tool=pen]{cursor:crosshair}.bench-container[data-tool=eraser]{cursor:cell}.bench-svg [data-port]{cursor:crosshair}.bench-svg [data-slider]{cursor:ew-resize}.bench-svg [data-component]{cursor:grab}.bench-svg [data-port]:focus-visible,.bench-svg [data-slider]:focus-visible{outline:none;stroke:var(--warm);stroke-width:3}.view-controls{position:absolute;bottom:8px;left:10px;display:flex;align-items:center;background:#fffffff2;border:1px solid var(--line);border-radius:7px}.view-controls .icon-button{width:36px;min-width:36px;min-height:44px}.view-controls .quiet-button{font-size:11px;padding:5px 8px}.selected-wire-action{position:absolute;bottom:8px;right:10px;background:white;border:1px solid var(--line);font-size:11px}.bench-status{display:flex;justify-content:space-between;gap:14px;padding:4px 14px;min-height:26px;font-size:11px;color:var(--muted);background:white}.bench-status span:last-child{font-size:10px}.meter-focus{flex:1;min-height:0;display:grid;grid-template-columns:1fr 1fr;grid-template-rows:minmax(0,1fr) auto;gap:12px;padding:18px 24px 8px;align-items:center}.meter-focus figure{margin:0;min-height:0;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden}.meter-focus figcaption{font-size:14px;color:var(--ink);margin-bottom:7px;line-height:1.5}.meter-focus figcaption span{display:block;color:var(--muted);font-size:10px}.meter-focus figure>div{min-height:0;max-height:100%;width:100%;display:flex;justify-content:center;align-items:center;cursor:zoom-in}.meter-focus svg{max-height:350px;width:auto;max-width:100%;height:100%}.meter-focus-note{grid-column:1/-1;text-align:center;color:var(--muted);font-size:11px;line-height:1.6}.ink-options{position:absolute;top:60px;left:12px;display:flex;align-items:center;gap:12px;background:#fffffff5;border:1px solid var(--line);border-radius:8px;padding:3px 8px;z-index:8;box-shadow:0 4px 16px #192b4812}.pen-colors{display:flex;gap:0}.pen-colors button{width:40px;min-height:44px;position:relative;padding:0}.pen-colors button:before{content:'';display:block;width:16px;height:16px;margin:auto;border-radius:50%;background:var(--pen)}.pen-colors button[aria-pressed=true]:before{outline:2px solid var(--pen);outline-offset:3px}.ink-options>label{display:flex;align-items:center;font-size:10px;gap:6px}.ink-options select{width:60px;font-size:11px;padding:4px}
.record-panel{background:white;border-left:1px solid var(--line);min-height:0;display:flex;flex-direction:column;padding:0 12px;overflow:hidden}.records-heading{display:flex;align-items:center;gap:8px;min-height:45px;flex-shrink:0}.records-heading h2{font-size:13px;font-weight:650}.records-heading small{display:none}.records-heading>span{font:10px Consolas,monospace;color:var(--muted)}.records-heading button{margin-left:auto;padding:4px 8px;min-height:40px;font-size:10px}.record-form{display:grid;grid-template-columns:1fr 1fr 54px;gap:6px;align-items:end;padding-bottom:10px;flex-shrink:0}.record-form label{display:flex;flex-direction:column;gap:4px;font-size:11px;color:var(--muted)}.record-form input{width:100%;font:14px Consolas,monospace;padding:7px}.record-form button{font-size:12px;height:44px;padding:6px}.table-scroll{overflow:auto;min-height:160px;flex:1;scrollbar-width:thin;overscroll-behavior:contain;border-top:1px solid var(--line)}table{width:100%;border-collapse:collapse;table-layout:fixed;font:12px Consolas,monospace}th,td{text-align:center;border-bottom:1px solid #edf1f7;height:44px;padding:4px 2px;white-space:nowrap}th{height:30px;font:11px DengXian,'Microsoft YaHei',sans-serif;color:var(--muted);position:sticky;top:0;background:white;z-index:1}th:first-child,td:first-child{width:26px}th:last-child,td:last-child{width:36px}td button{min-height:44px;width:32px;padding:0;font-size:18px;color:#8d99ab;font-weight:400}.empty-table{height:138px;white-space:normal;color:#8997aa;font:12px DengXian,'Microsoft YaHei',sans-serif;line-height:1.8;padding:15px}.computed-cell{color:var(--blue)}.numeric-helper{display:flex;align-items:center;gap:6px;justify-content:space-between;border-top:1px solid var(--line);font-size:11px;color:var(--muted);flex-shrink:0}.numeric-helper strong{color:var(--ink);font-family:Consolas,monospace}.numeric-helper button{font-size:10px;padding:4px}.teacher-hint{font-size:11px;color:var(--muted);line-height:1.7;padding:8px 2px;max-height:88px;overflow:auto;border-top:1px solid var(--line)}.diagnostic-details{font-size:11px;color:var(--muted);flex-shrink:0}.diagnostic-details summary{cursor:pointer;min-height:36px;display:flex;align-items:center}.diagnostic-details>div{max-height:200px;overflow:auto;font-size:11px;line-height:1.8;padding-bottom:10px}.diagnostic-details p+p{margin-top:8px}
.graph-view{height:100%;display:flex;flex-direction:column;min-height:0}.graph-settings{display:flex;align-items:center;gap:10px;padding:5px 14px;background:white;border-bottom:1px solid var(--line);min-height:56px;flex-shrink:0}.graph-settings label{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:11px;white-space:nowrap}.graph-settings select{width:126px;font-size:12px}.graph-settings input{width:76px;font:12px Consolas,monospace}.graph-settings button{font-size:11px;margin-left:auto}.graph-container{flex:1;min-height:0;touch-action:none;overflow:hidden;outline-offset:-4px;cursor:crosshair}.graph-container svg{height:100%;width:100%;display:block;user-select:none;touch-action:none}.graph-footer{padding:4px 14px;display:flex;justify-content:space-between;gap:10px;font-size:11px;color:var(--muted);flex-shrink:0}.graph-footer output{font-family:Consolas,monospace}.graph-aids{min-height:44px;padding:3px 14px;display:flex;align-items:center;gap:16px;border-top:1px solid var(--line);background:white;flex-shrink:0}.graph-aids label{display:flex;align-items:center;gap:5px;font-size:11px;min-height:38px}.graph-aids>span{font-size:10px;color:var(--muted);margin-left:auto}.app-footer{min-height:25px;padding:2px 14px;border-top:1px solid var(--line);background:white;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:var(--muted);gap:10px;flex-shrink:0}.app-footer>div{display:flex;align-items:center;gap:6px}.app-footer>p{position:fixed;bottom:32px;left:50%;transform:translateX(-50%);max-width:calc(100% - 30px);padding:10px 14px;background:#fff4dc;color:#795c27;border:1px solid #e7d3a9;border-radius:8px;z-index:60;font-size:12px}
.meter-loupe{position:fixed;right:380px;top:130px;width:244px;background:white;border:1px solid #bcc9df;border-radius:9px;box-shadow:0 8px 30px #192b4829;z-index:50;overflow:hidden}.loupe-header{display:flex;align-items:center;padding:2px 4px 2px 10px;border-bottom:1px solid var(--line);cursor:move;touch-action:none}.loupe-header h2{font-size:12px;margin-right:auto}.loupe-header button{font-size:11px;padding:4px}.loupe-header .icon-button{font-size:19px}#loupe-view{padding:6px 12px}#loupe-view svg{display:block;width:100%;height:auto!important}dialog{width:min(540px,calc(100% - 28px));max-height:calc(100dvh - 32px);border:1px solid var(--line);border-radius:12px;padding:22px;color:var(--ink);box-shadow:0 14px 50px #192b4833;overscroll-behavior:contain}dialog::backdrop{background:#192b484d}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:12px}.dialog-heading h2{font-size:18px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.settings-grid label{display:flex;flex-direction:column;gap:7px;font-size:12px}.field-note{font-size:12px;line-height:1.8;color:var(--muted);margin:10px 0}.field-label{display:block;font-size:12px;margin:14px 0 7px}dialog>select,dialog>input{width:100%}.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:46px;font-size:12px}.dialog-button-row{display:flex;gap:8px;margin:12px 0}.dialog-button-row button{flex:1;font-size:12px}dialog hr{border:0;border-top:1px solid var(--line);margin:20px 0}.dialog-message{font-size:12px;color:#477160;line-height:1.8}.dialog-message[data-error=true]{color:var(--danger)}.help-steps{font-size:13px;line-height:1.9;padding-left:20px}.help-steps li{margin-bottom:10px}dialog details summary{cursor:pointer;min-height:44px;font-size:12px;display:flex;align-items:center}.toast{position:fixed;left:50%;bottom:36px;transform:translateX(-50%);max-width:min(580px,calc(100% - 28px));background:#192b48f2;color:white;padding:11px 16px;font-size:12px;line-height:1.7;border-radius:8px;z-index:100;box-shadow:0 5px 24px #192b4824}
@media(min-width:1600px){.workspace{grid-template-columns:minmax(0,1fr) 390px}.record-panel{padding:0 18px}}
@media(max-width:1100px){.workspace{grid-template-columns:minmax(0,1fr) 310px}.app-header{gap:12px}.task-tabs button{padding:8px 12px}.task-note{display:none}.view-toolbar{gap:4px;padding-left:9px;padding-right:9px}.view-tabs button{padding:8px 12px}.inline-tools{padding-left:4px;gap:0}.meter-loupe{right:326px}.graph-settings{gap:7px;padding:5px 9px}.graph-settings label{gap:4px}.graph-settings input{width:62px}.graph-settings select{width:110px}.graph-settings button{padding:7px}.graph-aids>span{display:none}.history-tools{margin-left:auto}}
@media(max-width:700px){.app-header{min-height:88px;max-height:88px;flex-wrap:wrap;gap:0 8px;padding:0 9px;align-content:center}.brand{height:44px;gap:5px}.brand img{width:22px;height:22px}.brand h1{font-size:14px}.brand h1 span{font-size:11px}.header-actions{height:44px}.header-actions .icon-button{width:40px;min-width:40px}.task-tabs{order:3;width:100%;height:44px;gap:5px}.task-tabs button{flex:1;font-size:12px;min-height:40px}.view-toolbar{min-height:46px;max-height:46px;padding:1px 5px;gap:0;justify-content:space-between}.view-tabs{gap:1px}.view-tabs button{font-size:11px;min-height:44px;padding:8px 9px}.inline-tools{padding-left:2px;border-left:0}.inline-tools .icon-button{width:38px;min-width:38px;padding:10px}.inline-tools .icon{width:17px;height:17px}.history-tools{display:none}.more-tools>summary{width:40px}.workspace{display:flex;flex-direction:column;min-height:0}.main-display{flex:1;min-height:220px}.record-panel{height:248px;min-height:248px;max-height:248px;border-left:0;border-top:1px solid var(--line);padding:0 9px;flex-shrink:0}.records-heading{min-height:28px;max-height:28px}.records-heading h2{font-size:11px}.records-heading small{display:inline;color:var(--muted);font-size:9px;font-weight:400;margin-left:5px}.records-heading button{min-height:28px;max-height:28px;font-size:9px;padding:1px 7px}.record-form{grid-template-columns:1fr 1fr 52px;gap:6px;padding-bottom:5px}.record-form label{flex-direction:row;align-items:center;gap:4px;white-space:nowrap;font-size:10px}.record-form input{height:44px;min-width:0;padding:5px;width:100%;font-size:13px}.record-form button{font-size:11px}.table-scroll{min-height:154px}th{height:24px;font-size:10px}td{height:44px;font-size:12px}td button{min-height:44px}.numeric-helper{min-height:32px;font-size:10px}.numeric-helper button{min-height:32px}.diagnostic-details{position:absolute;right:8px;bottom:25px;z-index:12;background:white;border:1px solid var(--line);border-radius:7px;max-width:calc(100% - 16px)}.diagnostic-details summary{min-height:26px;padding:3px 8px;font-size:9px}.diagnostic-details[open]{width:calc(100% - 16px);max-height:210px;box-shadow:0 8px 30px #192b4829}.diagnostic-details>div{padding:3px 10px 10px;max-height:170px}.teacher-hint{position:absolute;left:12px;right:12px;bottom:258px;background:#fff8e9;z-index:15;border:1px solid #eadbc0;border-radius:6px;padding:7px;font-size:10px;max-height:80px}.experiment-context{min-height:46px;gap:6px;padding:1px 8px}.known-resistance{gap:4px}.known-resistance label{font-size:10px}.known-resistance select{width:74px;font-size:12px;min-height:44px;padding:6px}.target-control{font-size:10px;gap:3px}.target-control input{width:53px;min-height:44px;padding:6px;font-size:12px}.focus-tabs button{min-height:42px;padding:7px 9px;font-size:10px}.bench-status{min-height:20px;max-height:20px;font-size:9px;padding:2px 8px;overflow:hidden;white-space:nowrap}.bench-status span:last-child{display:none}.meter-focus{gap:5px;padding:3px 10px 2px;grid-template-rows:minmax(0,1fr) auto}.meter-focus figcaption{font-size:11px;margin-bottom:2px}.meter-focus figcaption span{font-size:8px;display:none}.meter-focus svg{max-height:235px;max-width:100%;height:100%}.meter-focus-note{font-size:9px;line-height:1.3;margin-top:2px}.meter-focus figure>div{width:100%;flex:1;min-height:0}.view-controls{left:7px;bottom:5px}.selected-wire-action{font-size:9px;padding:5px;right:7px;bottom:5px}.graph-settings{min-height:46px;gap:5px;padding:1px 7px}.graph-settings label{font-size:0;gap:0}.graph-settings select{font-size:10px;width:99px;height:44px;padding:5px}.graph-settings input{width:65px;height:44px;font-size:12px;padding:5px}.graph-settings button{font-size:10px;margin-left:auto;min-height:44px;padding:5px 8px}.graph-footer{font-size:9px;min-height:20px;padding:2px 8px}.graph-footer output{display:none}.graph-aids{min-height:36px;padding:0 8px;gap:13px}.graph-aids label{font-size:10px;min-height:36px}.app-footer{min-height:24px;max-height:24px;padding:1px 8px;font-size:8px;gap:5px}.app-footer>span{max-width:38%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.app-footer>div{gap:2px}.app-footer .text-button{font-size:8px;min-height:22px}.meter-loupe{right:8px;top:146px;width:176px;max-height:calc(100dvh - 420px);min-height:190px}.loupe-header{padding:0 2px 0 7px}.loupe-header h2{font-size:10px}.loupe-header .quiet-button{font-size:9px;min-height:40px;padding:3px}.loupe-header .icon-button{width:32px;min-width:32px;min-height:40px}.meter-loupe #loupe-view{padding:2px 8px;max-height:230px;overflow:hidden}.ink-options{left:6px;top:48px;padding:1px 5px;gap:5px}.pen-colors button{width:36px;min-height:40px}.ink-options select{height:40px;min-height:40px}.ink-options>label{font-size:9px}.empty-table{font-size:10px;height:132px}.menu-panel{top:46px}.graph-container{min-height:120px}}
@media(max-width:374px){.brand h1 span{display:none}.inline-tools .icon-button{width:35px;min-width:35px;padding:9px}.view-tabs button{padding:8px 7px}.more-tools>summary{width:36px}.target-control input{width:45px}.focus-tabs button{padding:6px 7px}.experiment-context{padding-left:6px;padding-right:6px;gap:4px}.known-resistance select{width:68px}.graph-settings select{width:90px}.graph-settings input{width:58px}}
@media(max-height:700px) and (max-width:700px){.record-panel{height:238px;min-height:238px;max-height:238px}.meter-focus-note{display:none}.meter-focus svg{max-height:180px}.bench-status{display:none}.meter-focus figcaption{font-size:10px}.main-display{min-height:190px}.meter-loupe{max-height:220px;top:136px}.app-header{min-height:80px;max-height:80px}.task-tabs,.task-tabs button{height:38px;min-height:38px}.brand,.header-actions{height:40px}.teacher-hint{bottom:248px}}
@media(max-height:560px) and (min-width:701px){.app-header{min-height:44px}.view-toolbar{min-height:44px;max-height:44px}.experiment-context{min-height:44px}.bench-status{display:none}.record-panel{width:300px}.workspace{grid-template-columns:minmax(0,1fr) 300px}.meter-focus{padding-top:3px}.meter-focus-note{display:none}.meter-focus figcaption{font-size:11px}.meter-focus svg{max-height:215px}.graph-footer{display:none}.app-footer{min-height:22px}.meter-loupe{top:90px;width:190px;right:315px}.graph-settings{gap:4px;min-height:46px}.graph-settings label{font-size:0}.graph-settings select{width:100px}.graph-settings input{width:58px}.graph-settings button{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}

/* Keep small visual icons inside complete touch targets. */
.view-controls .icon-button{width:44px;min-width:44px}td button{width:44px}th:last-child,td:last-child{width:44px}.records-heading button{min-height:44px}
.menu-panel{max-height:calc(100dvh - 170px);overflow:auto}.menu-panel .diagnostic-details{position:static;max-width:none;border:0;padding:0;margin:0}.menu-panel .diagnostic-details summary{min-height:44px;padding:8px;font-size:12px}.menu-panel .diagnostic-details[open]{max-height:none}.menu-panel #diagnostics{padding:3px 8px;font-size:11px;line-height:1.7}td{padding-top:0;padding-bottom:0}
.meter-focus figure>div{flex:1;min-height:0}.meter-focus svg{height:100%!important;width:100%!important;max-height:100%;max-width:100%}
@media(max-width:700px){.header-actions .icon-button,.inline-tools .icon-button,.more-tools>summary{width:44px;min-width:44px}.task-tabs button{min-height:44px}.view-tabs button{font-size:10px;padding-left:7px;padding-right:7px}.record-panel{height:264px;min-height:264px;max-height:264px}.records-heading{min-height:44px;max-height:44px}.records-heading button{min-height:44px;max-height:44px}.main-display{min-height:0}.diagnostic-details{bottom:25px}.graph-aids label{min-height:44px}.teacher-hint{bottom:274px}}
@media(max-width:374px){.brand h1{font-size:13px}.header-actions .icon-button{width:44px;min-width:44px}.view-tabs button{padding-left:3px;padding-right:3px;font-size:10px}.inline-tools .icon-button{width:44px;min-width:44px}.more-tools>summary{width:44px}.experiment-context{gap:3px}.known-resistance label{font-size:10px}.known-resistance select{width:66px}.focus-tabs button{padding-left:6px;padding-right:6px}}
@media(max-height:700px) and (max-width:700px){.app-header{min-height:88px;max-height:88px}.task-tabs,.task-tabs button,.brand,.header-actions{height:44px;min-height:44px}.record-panel{height:264px;min-height:264px;max-height:264px}.main-display{min-height:0}}
@media(max-height:560px) and (min-width:701px){.meter-focus{grid-template-rows:minmax(0,1fr);gap:0;padding-bottom:3px}.meter-focus figcaption span{display:none}.meter-focus figcaption{margin-bottom:2px}}

/* Compact reading uses the same dial, with short leads and a true single-meter focus. */
.meter-focus{position:relative}.reading-tabs{position:absolute;right:4px;top:4px;width:44px;display:flex;flex-direction:column;gap:0;z-index:2}.reading-tabs button{width:44px;min-width:44px;min-height:44px;padding:4px;font-size:11px;font-weight:400;color:var(--muted)}.reading-tabs button[aria-pressed=true]{color:var(--blue);background:var(--blue-pale)}.meter-focus.is-single{grid-template-columns:1fr}.meter-focus.is-single figure{width:calc(100% - 48px);margin-right:48px}.meter-focus.is-single figcaption span{display:block;font-size:10px}#settings-dialog .teacher-hint{position:static;max-height:none;padding:10px 0;margin:8px 0 0;border-top:1px solid var(--line);font-size:12px;line-height:1.8;color:var(--muted)}
body[data-view=graph] #record-form,body[data-view=graph] #numeric-helper{display:none!important}
@media(max-width:700px){
  .app-header{min-height:48px;max-height:48px;height:48px;flex-wrap:nowrap;gap:4px;padding:0 6px}.brand{min-height:44px;height:44px;gap:0}.brand img{width:24px;height:24px}.brand h1{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.task-tabs{order:0;flex:1;width:auto;min-width:0;height:44px;gap:2px}.task-tabs button{font-size:11px;white-space:nowrap;padding:7px 5px;min-height:44px}.header-actions{flex-shrink:0;margin-left:0;gap:0;height:44px}.header-actions .icon-button{width:44px;min-width:44px}
  .record-panel{height:228px;min-height:228px;max-height:228px;padding:2px 8px}.records-heading{height:20px;min-height:20px;max-height:20px}.record-form{padding-bottom:0;min-height:44px}.table-scroll{min-height:156px}.numeric-helper{height:44px;min-height:44px;margin:0}.numeric-helper button{min-height:44px}.has-values .record-panel{height:272px;min-height:272px;max-height:272px}
  body[data-view=graph] .record-panel{height:184px;min-height:184px;max-height:184px}body[data-view=measure][data-focus=circuit]:not([data-records-open=true]) .record-panel{height:calc(48px + env(safe-area-inset-bottom,0px));min-height:calc(48px + env(safe-area-inset-bottom,0px));max-height:calc(48px + env(safe-area-inset-bottom,0px))}body[data-view=measure][data-focus=circuit]:not([data-records-open=true]) .record-panel>:not(.records-heading){display:none!important}
  .meter-focus{padding:2px 4px;gap:2px}.meter-focus figure>div{width:100%;flex:1;min-height:0}.meter-focus svg{height:100%!important;width:100%!important;max-height:100%;max-width:100%}.meter-focus figcaption{font-size:11px;margin-bottom:2px;line-height:1.25}.meter-focus-note{font-size:9px;margin:0}.meter-focus.is-single .meter-focus-note{padding-right:48px}
}
@media(max-width:700px) and (max-height:740px){.meter-focus-note,.bench-status{display:none}.meter-focus{grid-template-rows:minmax(0,1fr)}body[data-view=measure][data-focus=meters][data-reading=A] .experiment-context,body[data-view=measure][data-focus=meters][data-reading=V] .experiment-context{display:none}.meter-focus.is-single figcaption span{display:block}}
@media(max-width:374px){.view-toolbar{padding-left:2px;padding-right:2px}.task-tabs button{font-size:11px;padding-left:4px;padding-right:4px}}
@media(max-height:560px) and (min-width:701px){.graph-view{position:relative}.graph-settings{padding:2px 120px 2px 8px;min-height:48px;gap:3px}.graph-settings select{width:88px}.graph-settings input{width:52px}.graph-settings button{margin-left:0;min-width:44px;padding:5px}.graph-aids{position:absolute;top:0;right:4px;width:108px;height:48px;min-height:48px;border:0;padding:2px 0;gap:4px;justify-content:flex-end}.graph-aids label{min-height:44px;min-width:44px;gap:4px;font-size:0}.graph-aids label::after{content:'点';font-size:11px}.graph-aids label:nth-child(2)::after{content:'线'}.graph-aids>span{display:none}}
@media(max-width:700px){.record-panel{height:230px;min-height:230px;max-height:230px}.has-values .record-panel{height:274px;min-height:274px;max-height:274px}body[data-view=graph] .record-panel{height:186px;min-height:186px;max-height:186px}.experiment-context{padding-top:0;padding-bottom:0;height:45px;min-height:45px;max-height:45px}}
@media(max-height:560px) and (min-width:701px){.app-footer{padding:0 8px;min-height:24px}.records-heading{height:20px;min-height:20px;max-height:20px}.record-panel{padding:2px 8px}.record-form{padding-bottom:0;min-height:44px}.record-form label{flex-direction:row;align-items:center;gap:3px;font-size:10px;white-space:nowrap}.record-form input{min-width:0;padding:5px;font-size:13px}.table-scroll{min-height:161px}.numeric-helper{height:44px;min-height:44px;margin:0}.numeric-helper button{min-height:44px}.experiment-context{padding:0 8px;height:45px;min-height:45px;max-height:45px}.meter-focus{grid-template-rows:minmax(0,1fr);padding:2px 8px;gap:0}.meter-focus figcaption{height:14px;line-height:14px;margin-bottom:2px}.meter-focus figcaption span{display:none}.meter-focus-note{display:none}}
@media(max-height:560px) and (min-width:701px){.meter-focus.is-single figcaption span{display:none}th{height:24px;padding:2px}}

/* An in-flow update notice gives the experiment its remaining viewport space. */
body.has-update-notice{--update-height:52px}
.update-notice{height:52px;min-height:52px;max-height:52px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:4px 12px;background:#edf2ff;border-bottom:1px solid #cdd9ff;color:#192b48}
.update-notice>div{min-width:0;display:flex;align-items:center;gap:12px}
.update-notice strong{font-size:12px;font-weight:600;line-height:1.35}
.update-notice small{font-size:11px;color:#68778f;white-space:nowrap}
.update-notice button{min-height:44px;min-width:88px;flex-shrink:0;padding:6px 10px;font-size:12px}
body[data-updating=true] .update-notice{background:#e8efff}
@media(max-width:700px){.update-notice{padding-left:8px;padding-right:8px;gap:6px}.update-notice>div{display:block}.update-notice strong{display:block;font-size:11px}.update-notice small{display:block;font-size:10px}.update-notice button{min-width:80px}}

/* Mobile records stay visible until the learner explicitly makes room for wiring. */
.records-toggle{display:none}
@media(max-width:700px){
  .record-panel{height:calc(230px + env(safe-area-inset-bottom,0px));min-height:calc(230px + env(safe-area-inset-bottom,0px));max-height:calc(230px + env(safe-area-inset-bottom,0px));padding-bottom:calc(2px + env(safe-area-inset-bottom,0px))}
  .has-values .record-panel{height:calc(274px + env(safe-area-inset-bottom,0px));min-height:calc(274px + env(safe-area-inset-bottom,0px));max-height:calc(274px + env(safe-area-inset-bottom,0px))}
  body[data-view=graph] .record-panel{height:calc(186px + env(safe-area-inset-bottom,0px));min-height:calc(186px + env(safe-area-inset-bottom,0px));max-height:calc(186px + env(safe-area-inset-bottom,0px))}
  body[data-view=measure][data-focus=circuit] .records-heading{height:44px;min-height:44px;max-height:44px}
  body[data-view=measure][data-focus=circuit] .records-toggle{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-height:44px;max-height:none;padding:6px 8px;color:var(--blue);font-size:11px}
  body[data-view=measure][data-focus=circuit][data-records-open=true] .record-panel{height:calc(254px + env(safe-area-inset-bottom,0px));min-height:calc(254px + env(safe-area-inset-bottom,0px));max-height:calc(254px + env(safe-area-inset-bottom,0px))}
  body.has-values[data-view=measure][data-focus=circuit][data-records-open=true] .record-panel{height:calc(298px + env(safe-area-inset-bottom,0px));min-height:calc(298px + env(safe-area-inset-bottom,0px));max-height:calc(298px + env(safe-area-inset-bottom,0px))}
}