:root {
  --navy: #102a56; --blue: #2563eb; --blue-2: #3b82f6; --pale: #eff6ff;
  --line: #dbe7f7; --ink: #17243d; --muted: #71809b; --white: #fff;
  --danger: #dc3f55; --success: #13956c; --shadow: 0 12px 30px rgba(25,69,129,.10);
}
* { box-sizing: border-box; }
body { margin:0; min-width:1100px; height:100vh; overflow:hidden; color:var(--ink); background:#f5f8fd; font-family:"Microsoft YaHei UI","PingFang SC",system-ui,sans-serif; }
button,input { font:inherit; }
button { cursor:pointer; }
.topbar { height:78px; display:grid; grid-template-columns:300px 1fr 300px; align-items:center; padding:0 22px; background:#fff; border-bottom:1px solid var(--line); box-shadow:0 2px 10px rgba(29,63,112,.05); position:relative; z-index:5; }
.brand { display:flex; align-items:center; gap:12px; color:var(--navy); text-decoration:none; }
.brand-mark { width:42px; height:42px; display:grid; place-items:center; border-radius:13px; background:linear-gradient(145deg,#1d4ed8,#60a5fa); color:#fff; font-size:22px; box-shadow:0 7px 15px rgba(37,99,235,.25); }
.brand strong,.brand small { display:block; }.brand strong{font-size:17px}.brand small{margin-top:2px;color:#8390a6;font-size:11px;letter-spacing:1px}
.lesson-title { justify-self:center; text-align:center; }.eyebrow{display:block;color:#91a0b6;font-size:10px;letter-spacing:2px}.lesson-title input{border:0;border-bottom:1px dashed transparent;background:transparent;text-align:center;font-size:16px;font-weight:700;color:#243858;padding:3px 8px;width:240px}.lesson-title input:hover,.lesson-title input:focus{border-color:#aac4ed;outline:0}
.header-actions { justify-self:end; display:flex; gap:9px; }
.button { border:0; border-radius:9px; padding:10px 16px; font-weight:700; color:#465673; background:#fff; transition:.18s; }
.button:hover { transform:translateY(-1px); }.button.primary{color:#fff;background:linear-gradient(135deg,#2563eb,#3b82f6);box-shadow:0 7px 16px rgba(37,99,235,.22)}.button.ghost{border:1px solid var(--line)}.button.subtle{padding:7px 11px;background:#f4f7fb;font-size:12px}.danger-text{color:#cc4053!important}.button.wide{width:100%;margin-top:10px}
.app-shell { display:grid; grid-template-columns:225px minmax(650px,1fr) 270px; height:calc(100vh - 78px); }
.sidebar,.inspector { background:#fff; overflow:auto; }.sidebar{border-right:1px solid var(--line);padding:22px 15px}.inspector{border-left:1px solid var(--line)}
.sidebar-heading span,.panel-title span{display:block}.sidebar-heading b,.panel-title b{display:block;font-size:14px}.sidebar-heading small,.panel-title small{display:block;color:#93a0b4;font-size:10px;margin-top:4px}
.palette { display:grid; grid-template-columns:1fr 1fr; gap:9px; margin-top:18px; }
.palette-item { min-height:92px; padding:10px 5px 7px; border:1px solid #e3ebf7; border-radius:10px; background:#fbfdff; text-align:center; user-select:none; transition:.18s; }
.palette-item:hover { border-color:#80aaf1; background:#f3f7ff; transform:translateY(-2px); box-shadow:0 7px 16px rgba(30,73,141,.1) }.palette-symbol{height:48px;display:grid;place-items:center}.palette-item b{display:block;font-size:11px;color:#43536c}.palette-item small{font-size:9px;color:#9aa6b8}
.tip-card{display:flex;gap:9px;margin-top:18px;padding:12px;border-radius:10px;background:#edf5ff;color:#647691;font-size:10px;line-height:1.55}.tip-card p{margin:0}.tip-card b{color:#34547d}.tip-icon{font-size:18px}
.workspace-wrap{min-width:0;display:grid;grid-template-rows:48px 1fr 33px;background:#f7f9fd}.toolbar{display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid var(--line);background:#fff}.tool-group{display:flex;align-items:center;gap:5px}.icon-button{width:31px;height:31px;border:0;border-radius:7px;background:transparent;color:#697895;font-size:17px}.icon-button:hover,.icon-button.active{color:#2563eb;background:#eaf2ff}.divider{height:22px;border-left:1px solid #dbe4f1;margin:0 5px}
.view-switch{display:flex;padding:3px;background:#edf3fb;border:1px solid #dfe9f6;border-radius:9px}.view-switch button{border:0;background:transparent;color:#71819a;border-radius:6px;padding:6px 12px;font-size:10px;font-weight:700}.view-switch button.active{background:#fff;color:#2364d4;box-shadow:0 2px 7px rgba(30,68,125,.12)}.view-switch span{font-size:12px;margin-right:3px}
.sync-views{border:1px solid #dbe7f7;background:#fff;color:#71819a;border-radius:8px;padding:7px 10px;font-size:10px;font-weight:700;white-space:nowrap;transition:.18s}.sync-views:hover{border-color:#9dbcf0;background:#f6f9ff}.sync-views.active{color:#2563eb;background:#edf4ff;border-color:#b9d2f7;box-shadow:0 2px 7px rgba(37,99,235,.1)}.sync-views span{font-size:12px;margin-right:3px}
.workspace{position:relative;overflow:hidden;background-color:#f9fbfe;background-image:radial-gradient(#cddcf1 1px,transparent 1px);background-size:20px 20px}.workspace.physical-workspace{background-color:#f5f8fc;background-image:linear-gradient(rgba(187,205,227,.22) 1px,transparent 1px),linear-gradient(90deg,rgba(187,205,227,.22) 1px,transparent 1px);background-size:30px 30px}.workspace.drag-over{outline:3px solid #82aaf3;outline-offset:-3px}.wire-layer{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}.wire{fill:none;stroke:#2870d4;stroke-width:4;stroke-linecap:round;pointer-events:stroke;cursor:pointer;filter:drop-shadow(0 1px 1px rgba(0,0,0,.12))}.wire:hover,.wire.selected{stroke:#f05a68;stroke-width:6}.physical-workspace .wire{stroke:#df3c49;stroke-width:5}.mode-badge{position:absolute;left:14px;top:13px;padding:7px 10px;border:1px solid #dae7f7;border-radius:8px;background:rgba(255,255,255,.88);box-shadow:0 4px 12px rgba(34,70,120,.07);z-index:1}.mode-badge b,.mode-badge span{display:block}.mode-badge b{font-size:10px;color:#37618f}.mode-badge span{font-size:8px;color:#91a0b4;margin-top:2px}.physical-workspace .mode-badge b{color:#c33e4d}.empty-state{position:absolute;left:50%;top:48%;transform:translate(-50%,-50%);text-align:center;color:#8c9bb1}.empty-state h2{font-size:17px;color:#5a6980;margin:13px 0 4px}.empty-state p{font-size:11px;margin:0 0 18px}.empty-illustration{width:90px;height:70px;margin:auto;border:2px dashed #bdd0eb;border-radius:14px;display:grid;place-items:center;background:rgba(255,255,255,.75)}.empty-illustration span{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:#dceaff;color:#3475dc;font-size:23px}
.zoom-control{position:absolute;right:14px;bottom:14px;display:flex;align-items:center;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);overflow:hidden}.zoom-control button{border:0;background:#fff;width:30px;height:28px;color:#59708f}.zoom-control span{width:45px;text-align:center;font-size:10px;color:#7789a4}
.statusbar{display:flex;align-items:center;justify-content:space-between;padding:0 14px;background:#fff;border-top:1px solid var(--line);font-size:10px;color:#8996aa}.statusbar b{font-weight:600;color:#667892}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#37b887;margin-right:7px}
.inspector-section{padding:20px 17px;border-bottom:1px solid var(--line)}.panel-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.progress-ring{display:grid;place-items:center;width:35px;height:35px;border-radius:50%;font-size:9px;font-weight:bold;color:#3373dc;background:conic-gradient(#3478e5 0deg,#eaf0f8 0deg);border:3px solid #edf3fa}.goal-item{display:flex;align-items:center;gap:8px;padding:9px 5px;border-bottom:1px solid #eff3f8;color:#5c6d86;font-size:11px}.goal-item input{accent-color:#3478e5}.properties{text-align:left;font-size:11px}.empty-properties{text-align:center;color:#9aa6b8;padding:8px}.property-placeholder{margin:auto;width:45px;height:45px;display:grid;place-items:center;border-radius:50%;background:#eef4fb;font-size:22px}.property-row{display:flex;justify-content:space-between;align-items:center;margin:10px 0}.property-row input{width:85px;padding:6px;border:1px solid var(--line);border-radius:6px}.property-row button{border:1px solid var(--line);background:#f8fbff;border-radius:6px;padding:6px 9px;color:#48617f}.result-idle{text-align:center;color:#98a4b5;font-size:10px;padding:12px}.result-idle span{display:grid;place-items:center;margin:auto;width:44px;height:44px;border-radius:50%;background:#eff4fa;color:#b5c1d0;font-size:20px}.result-message{border-radius:9px;padding:11px;margin-top:7px;font-size:10px;line-height:1.5}.result-message b{display:block;font-size:11px}.result-message.ok{background:#eaf9f3;color:#18795e}.result-message.warn{background:#fff5e6;color:#a56609}.result-message.error{background:#ffedf0;color:#b93146}
.component{position:absolute;width:110px;height:76px;transform:translate(-50%,-50%);user-select:none;cursor:grab;z-index:2}.component.selected:after{content:"";position:absolute;inset:-4px;border:2px solid #6d9fed;border-radius:10px;box-shadow:0 0 0 3px rgba(71,127,220,.13)}.component-card{position:absolute;inset:8px 7px 10px;background:#fff;border:1px solid #d9e5f4;border-radius:9px;box-shadow:0 5px 13px rgba(34,68,118,.12);display:grid;place-items:center}.component.physical .component-card{inset:2px 5px 7px;border-color:#cbd9e8;background:linear-gradient(145deg,#fff,#edf3f9);box-shadow:0 7px 15px rgba(34,56,87,.16)}.component-label{position:absolute;bottom:-4px;left:-15px;right:-15px;text-align:center;font-size:9px;color:#62728b}.terminal{position:absolute;width:15px;height:15px;transform:translate(-50%,-50%);border-radius:50%;border:3px solid #fff;background:#377ce2;box-shadow:0 0 0 2px #8eafe0;z-index:4;cursor:crosshair}.physical .terminal{width:16px;height:16px;background:#d83e4b;box-shadow:0 0 0 2px #8b2630,0 2px 4px rgba(0,0,0,.25)}.terminal:hover{transform:translate(-50%,-50%) scale(1.18)}.terminal.pending{background:#ffb22e;box-shadow:0 0 0 4px rgba(255,178,46,.22)}
.circuit-symbol{position:relative;width:70px;height:35px;color:#243b61}.lead{position:absolute;top:17px;width:17px;border-top:2px solid currentColor}.lead.l{left:0}.lead.r{right:0}.battery-plates{position:absolute;left:28px;top:6px;width:14px;height:25px;border-left:3px solid currentColor;border-right:1px solid currentColor}.lamp-circle{position:absolute;left:22px;top:4px;width:30px;height:30px;border:2px solid currentColor;border-radius:50%}.lamp-circle:before,.lamp-circle:after{content:"";position:absolute;left:4px;top:13px;width:20px;border-top:2px solid currentColor;transform:rotate(45deg)}.lamp-circle:after{transform:rotate(-45deg)}.switch-arm{position:absolute;left:22px;top:16px;width:28px;border-top:2px solid currentColor;transform:rotate(-24deg);transform-origin:left}.switch-arm.closed{transform:rotate(0)}.switch-dot{position:absolute;top:13px;width:7px;height:7px;border-radius:50%;background:currentColor}.switch-dot.a{left:18px}.switch-dot.b{right:18px}.resistor-box{position:absolute;left:19px;top:10px;width:34px;height:15px;border:2px solid currentColor}.meter-circle{position:absolute;left:20px;top:2px;width:34px;height:34px;border:2px solid currentColor;border-radius:50%;display:grid;place-items:center;font-weight:bold}.rheostat-symbol .resistor-box{left:17px}.rheo-arrow{position:absolute;left:34px;top:0;height:28px;border-left:2px solid currentColor;transform:rotate(24deg)}.rheo-arrow:after{content:"";position:absolute;left:-4px;bottom:0;width:7px;height:7px;border-left:2px solid;border-bottom:2px solid;transform:rotate(-45deg)}.spdt-symbol i:not(.spdt-line){position:absolute;width:6px;height:6px;border-radius:50%;background:currentColor}.spdt-symbol i:nth-of-type(2){left:10px;top:15px}.spdt-symbol i:nth-of-type(3){right:10px;top:5px}.spdt-symbol i:nth-of-type(4){right:10px;bottom:4px}.spdt-line{position:absolute;left:15px;top:17px;width:42px;border-top:2px solid;transform:rotate(-13deg);transform-origin:left}.spdt-line.down{transform:rotate(13deg)}.lamp-on .lamp-circle{color:#e6a400;background:#fff1a8;box-shadow:0 0 14px #ffd84f}.lamp-on .component-card{background:#fffdf1}
.real{position:relative;width:86px;height:52px;color:#243650}.real-battery{display:flex;align-items:center;justify-content:center;gap:2px}.real-battery i{width:23px;height:38px;border-radius:5px;background:linear-gradient(90deg,#1f4d91,#4d87d6,#183b70);border-top:4px solid #cbd2db}.real-battery span{position:absolute;color:#fff;font-size:7px;font-weight:bold}.real-lamp .bulb{position:absolute;left:30px;top:1px;width:28px;height:30px;border-radius:50% 50% 42% 42%;background:linear-gradient(135deg,#edf8ff,#b9d5e6);border:1px solid #7892a4}.real-lamp .base{position:absolute;left:34px;top:30px;width:20px;height:15px;background:repeating-linear-gradient(#858f99 0 3px,#d3d9dc 3px 5px)}.lamp-on .real-lamp .bulb{background:#ffe674;box-shadow:0 0 17px #ffd33d}.real-switch .post{position:absolute;top:26px;width:10px;height:10px;border-radius:50%;background:#8c9aa8}.real-switch .p1{left:17px}.real-switch .p2{right:17px}.real-switch .blade{position:absolute;left:24px;top:27px;width:42px;border-top:5px solid #bd8239;transform:rotate(-20deg);transform-origin:left}.real-switch .blade.closed{transform:rotate(0)}.real-resistor i{position:absolute;left:12px;right:12px;top:18px;height:18px;border-radius:8px;background:linear-gradient(#ddc38c,#ae874d);border:1px solid #87662e}.real-resistor span{position:absolute;left:0;right:0;top:22px;text-align:center;font-size:7px;color:#4f3519}.real-meter{display:grid;place-items:center}.real-meter .dial{position:absolute;top:2px;width:64px;height:42px;border-radius:5px;background:#fafafa;border:3px solid #47627d}.real-meter .dial b{position:absolute;left:0;right:0;top:7px;text-align:center;font-size:15px}.real-meter .dial i{position:absolute;left:31px;bottom:5px;width:20px;border-top:1px solid #e24851;transform:rotate(-25deg);transform-origin:left}.real-meter>span{position:absolute;bottom:4px;font-size:6px;color:#fff;background:#3b4e61;padding:1px 5px;border-radius:2px}.real-motor{display:grid;place-items:center}.real-motor i{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle,#dbe6ed 0 33%,#7691a5 35% 43%,#b6c7d1 45%);border:2px solid #526d80;font-style:normal;font-weight:bold}.real-motor span{position:absolute;right:-4px;bottom:1px;font-size:6px}.motor-on .real-motor i{animation:motorSpin .5s linear infinite;color:#1c68d6}.real-rheostat .coil{position:absolute;left:14px;right:14px;bottom:9px;height:20px;border-radius:4px;background:repeating-linear-gradient(90deg,#b36b3f 0 3px,#e2a070 3px 6px);border:2px solid #6c7782}.real-rheostat .slider{position:absolute;top:4px;width:14px;height:28px;background:#607486;border-radius:3px;box-shadow:0 2px 4px rgba(0,0,0,.25)}.real-rheostat span{position:absolute;left:0;right:0;bottom:-1px;text-align:center;font-size:6px}.real-spdt .spdt-dot{position:absolute;width:9px;height:9px;border-radius:50%;background:#697b8e}.real-spdt .common{left:13px;top:23px}.real-spdt .one{right:13px;top:8px}.real-spdt .two{right:13px;bottom:8px}.real-spdt .spdt-arm{position:absolute;left:21px;top:26px;width:47px;border-top:5px solid #b77b34;transform:rotate(-17deg);transform-origin:left}.real-spdt .spdt-arm.down{transform:rotate(17deg)}
.connection-note{padding:8px;border-radius:7px;background:#eef5ff;color:#637895;line-height:1.5}.connection-note b{color:#2563eb}.slider-row{display:block}.slider-row input{display:block;width:100%;margin-top:7px;accent-color:#2d70da}@keyframes motorSpin{to{transform:rotate(360deg)}}
.telemetry-panel{padding-top:16px}.live-dot{font-size:8px;letter-spacing:1px;color:#15936b;background:#e9f9f2;border-radius:8px;padding:4px 6px}.telemetry-idle{text-align:center;color:#9aa8ba;font-size:10px;padding:10px 0}.telemetry-idle span{display:grid;place-items:center;width:38px;height:38px;margin:auto;border-radius:50%;background:#eef4fb;font-size:19px}.telemetry-idle p{margin:7px 0 0;line-height:1.5}.telemetry-values{font-size:10px}.telemetry-name{font-size:12px;font-weight:700;color:#314967;margin-bottom:10px}.telemetry-name small{display:block;color:#91a0b3;font-size:9px;font-weight:400;margin-top:3px}.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}.metric-grid>div{padding:9px 7px;border-radius:8px;background:#f1f6fd;border:1px solid #e1ebf7}.metric-grid b{display:block;color:#2165d3;font-size:16px;line-height:1.1}.metric-grid small{display:block;color:#7b8da5;font-size:9px;margin-top:4px}.telemetry-line{display:flex;justify-content:space-between;padding:9px 1px;border-bottom:1px solid #e9eff6;color:#71839a}.telemetry-line b{color:#3d5572}.telemetry-note{margin-top:9px;padding:7px 8px;border-radius:7px;background:#fff5e7;color:#a36a15;line-height:1.4}.telemetry-note.good{background:#eaf9f2;color:#167b5b}
.workspace>.telemetry-panel{position:absolute;right:14px;top:14px;width:218px;padding:13px 13px 12px;border:1px solid #d8e5f4;border-radius:11px;background:rgba(255,255,255,.94);box-shadow:0 10px 26px rgba(29,67,119,.14);z-index:3;backdrop-filter:blur(5px)}.workspace>.telemetry-panel .panel-title{margin-bottom:9px}.workspace>.telemetry-panel .telemetry-idle{padding:5px 0}.workspace>.telemetry-panel .telemetry-values{font-size:9px}
.telemetry-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:0;border:0;background:transparent;text-align:left}.telemetry-toggle .panel-title{margin:0;flex:1}.telemetry-toggle>i{font-style:normal;color:#68809e;font-size:16px;transition:.2s}.telemetry-panel:not(.expanded) #telemetryContent{display:none}.telemetry-panel:not(.expanded){width:126px;padding:9px 11px}.telemetry-panel:not(.expanded) .telemetry-toggle>i{transform:rotate(180deg)}
@media(max-width:900px){body{min-width:0;overflow:auto}.topbar{grid-template-columns:1fr auto;height:68px;padding:0 12px}.brand strong{font-size:15px}.lesson-title{display:none}.header-actions .ghost{display:none}.app-shell{grid-template-columns:170px minmax(480px,1fr);height:calc(100vh - 68px)}.inspector{display:none}.toolbar{padding:0 8px}.sync-views{padding:6px 7px;font-size:9px}.workspace>.telemetry-panel{right:8px;top:8px}.workspace>.telemetry-panel:not(.expanded){width:112px}.palette{gap:6px}.palette-item{min-height:78px}.tip-card{display:none}}
.junction-dot{fill:#183558;stroke:#fff;stroke-width:2;cursor:crosshair}.junction-dot.pending{fill:#183558;stroke:#ffae27;stroke-width:3;filter:drop-shadow(0 0 5px rgba(255,174,39,.8))}.physical-workspace .junction-dot{fill:#a92431}.physical-workspace .junction-dot.pending{fill:#a92431;stroke:#ffae27}
.junction-dot.junction-base{fill:#183558;stroke:#ffae27;stroke-width:3;filter:drop-shadow(0 0 5px rgba(255,174,39,.7))}.physical-workspace .junction-dot.junction-base{fill:#a92431;stroke:#ffae27}
.wire-handle{fill:#fff;stroke:#2563eb;stroke-width:3;cursor:grab;filter:drop-shadow(0 2px 3px rgba(24,58,105,.28))}.physical-workspace .wire-handle{stroke:#df3c49}.wire-handle:active{cursor:grabbing;fill:#fff2b8}

/* Clean instrument treatment: the symbol sits directly on the canvas. */
.component.schematic .component-card{inset:0;background:transparent;border:0;box-shadow:none;border-radius:0}
.component.schematic .component-label{color:#506784;text-shadow:0 1px 0 #fff}
.component.physical .component-card{inset:4px 1px 8px;background:linear-gradient(155deg,#334252 0%,#111a25 52%,#080d14 100%);border:0;border-radius:7px;box-shadow:inset 0 1px 1px rgba(255,255,255,.22),inset 0 -3px 5px rgba(0,0,0,.55),0 8px 12px rgba(18,30,46,.28)}
.component.physical .component-card:after{content:"";position:absolute;inset:4px;border-radius:4px;border:1px solid rgba(255,255,255,.09);pointer-events:none}
.component.physical .component-label{color:#43566e;text-shadow:0 1px 0 #fff}
.component.physical .real{z-index:1}
.component.physical .terminal{border-color:#f7f9fc}
.component.schematic.lamp-on .component-card{filter:drop-shadow(0 0 11px rgba(255,211,55,.72))}
.component.schematic.lamp-on .lamp-circle{color:#dd9700;background:#fff0a0;box-shadow:0 0 9px #ffd23f,0 0 23px rgba(255,199,30,.9),0 0 37px rgba(255,189,20,.52)}
.component.physical.lamp-on .component-card{box-shadow:inset 0 1px 1px rgba(255,255,255,.22),inset 0 -3px 5px rgba(0,0,0,.55),0 0 17px rgba(255,203,47,.8),0 8px 12px rgba(18,30,46,.28)}
.component.physical.lamp-on .real-lamp .bulb{background:radial-gradient(circle at 42% 36%,#fffde1 0 15%,#ffe55c 43%,#f6ae16 100%);border-color:#e5a813;box-shadow:0 0 8px #fff3a0,0 0 22px #ffd232,0 0 40px rgba(255,188,19,.85)}

/* Standalone 3D objects: no shared rectangular frame around an instrument. */
.component.physical .component-card{inset:0;background:transparent;border:0;box-shadow:none;border-radius:0;overflow:visible}
.component.physical .component-card:after{display:none}
.component.physical .real{filter:drop-shadow(0 8px 5px rgba(22,35,48,.22))}
.component.physical .real-battery{width:76px;height:52px;gap:3px}
.component.physical .real-battery i{width:28px;height:42px;border-radius:5px 5px 8px 8px;background:linear-gradient(100deg,#aeb8c5 0 9%,#d42e35 10% 16%,#eceff2 17% 73%,#c3ccd5 74% 83%,#8a98a8 84%);border:0;box-shadow:inset -4px 0 4px rgba(0,0,0,.18),inset 3px 0 3px rgba(255,255,255,.7)}
.component.physical .real-battery i:before{content:"+";position:absolute;top:-7px;color:#b9c3cd;font-size:10px;font-weight:bold}.component.physical .real-battery span{color:#b5222b;font-weight:800;top:27px}
.component.physical .real-lamp{width:84px;height:58px}.component.physical .real-lamp:after{content:"";position:absolute;left:18px;right:18px;bottom:1px;height:7px;background:linear-gradient(#c89457,#71421e);border-radius:50%;box-shadow:0 2px 0 #4e331e}.component.physical .real-lamp .bulb{left:29px;top:2px;width:27px;height:31px}.component.physical .real-lamp .base{left:33px;top:32px;width:20px;height:16px}
.component.physical .real-switch{width:88px;height:55px}.component.physical .real-switch:after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:8px;background:linear-gradient(#c89457,#70421e);border-radius:50%;z-index:-1}.component.physical .real-switch .post{background:radial-gradient(circle at 35% 30%,#e5ebf0,#6d7b88 55%,#263746 58%);box-shadow:0 2px 2px rgba(0,0,0,.4)}
.component.physical .real-rheostat{width:96px;height:58px}.component.physical .real-rheostat .coil{left:9px;right:9px;bottom:10px;height:22px;border-radius:12px;background:repeating-linear-gradient(90deg,#8d512f 0 3px,#d98e57 3px 6px);box-shadow:inset 0 2px 2px rgba(255,255,255,.35),inset 0 -2px 3px rgba(0,0,0,.4)}.component.physical .real-rheostat .slider{top:1px;height:30px;background:linear-gradient(90deg,#b5c3cf,#465666,#d6dde2);border-radius:4px}.component.physical .real-box{width:91px;height:57px}.real-box .box-face{position:absolute;left:9px;right:9px;top:7px;bottom:5px;border-radius:5px;background:linear-gradient(145deg,#727f8d,#303d4a 48%,#17212d);box-shadow:inset 0 1px 2px rgba(255,255,255,.38),inset 0 -3px 4px rgba(0,0,0,.5);display:flex;align-items:center;justify-content:space-evenly}.real-box .box-face:before{content:"";position:absolute;left:8px;right:8px;bottom:5px;height:3px;background:#c7d1d8;opacity:.45}.real-box .box-knob{position:relative;width:15px;height:15px;border-radius:50%;background:radial-gradient(circle at 32% 28%,#fff,#a1adb7 18%,#3b4854 48%,#151c24 52%);box-shadow:0 2px 2px #111}.real-box .box-face span{position:absolute;bottom:7px;left:0;right:0;text-align:center;color:#e6edf2;font-size:7px}
.component.physical .real-meter .dial{background:linear-gradient(150deg,#fff,#dfe4e7);box-shadow:inset 0 0 0 2px #87939e,0 2px 3px rgba(0,0,0,.45)}

/* Reference-style physical rheostat: ceramic end supports, wound coil and a raised slider bridge. */
.component.physical .real-rheostat{width:108px;height:66px;filter:drop-shadow(0 8px 5px rgba(22,35,48,.28))}
.real-rheostat:before,.real-rheostat:after{content:"";position:absolute;bottom:8px;width:9px;height:38px;border:2px solid #65717e;background:linear-gradient(90deg,#2f3943,#c1cbd2 44%,#343f49);clip-path:polygon(20% 0,100% 0,80% 100%,0 100%);box-shadow:12px 0 0 -2px #72808a,inset 1px 0 2px rgba(255,255,255,.5)}
.real-rheostat:before{left:5px}.real-rheostat:after{right:5px;transform:scaleX(-1)}
.component.physical .real-rheostat .coil{left:20px;right:20px;bottom:19px;height:25px;border-radius:12px;background:repeating-linear-gradient(90deg,#121923 0 2px,#3c4650 2px 4px,#0a111a 4px 6px);border:3px solid #4c5965;box-shadow:inset 0 2px 4px #05090d,inset 0 -2px 3px rgba(255,255,255,.22)}
.component.physical .real-rheostat .coil:before{content:"";position:absolute;left:7px;right:7px;top:3px;height:3px;background:rgba(255,255,255,.18);border-radius:3px}
.component.physical .real-rheostat .slider{top:5px;left:47px;width:17px;height:34px;border-radius:3px;background:linear-gradient(90deg,#273541,#aab6c0 38%,#43505d 62%,#17222d);border:1px solid #16202a;box-shadow:0 2px 3px #0b1015;z-index:2}
.component.physical .real-rheostat .slider:before{content:"";position:absolute;left:4px;top:-7px;width:8px;height:10px;border-radius:2px;background:#17212b;transform:skew(-18deg)}
.component.physical .real-rheostat .coil:after{content:"";position:absolute;left:-17px;top:-20px;width:100px;border-top:3px solid #111923;box-shadow:0 1px 0 #8d9aa4;opacity:.98;z-index:4}
.component.physical .real-rheostat span{bottom:2px;color:#d7e0e6;font-size:6px;z-index:3;text-shadow:0 1px #000}

/* Reference-style physical switch: beveled base, upright posts and long metal lever. */
.component.physical .real-switch{width:108px;height:66px;filter:drop-shadow(0 8px 5px rgba(22,35,48,.28))}
.component.physical .real-switch:after{left:1px;right:1px;bottom:3px;height:20px;border:2px solid #6d7880;border-radius:2px;background:linear-gradient(145deg,#f1f3f3,#abb5b9 50%,#647079);clip-path:polygon(10% 0,100% 0,88% 100%,0 100%);box-shadow:inset 0 1px 1px rgba(255,255,255,.62),0 2px 2px rgba(0,0,0,.35);z-index:-1}
.component.physical .real-switch .post{top:30px;width:12px;height:20px;border-radius:3px 3px 5px 5px;background:linear-gradient(90deg,#263541,#bcc8d0 44%,#42515d);box-shadow:inset 1px 0 2px rgba(255,255,255,.5),0 2px 2px rgba(0,0,0,.35);z-index:1}
.component.physical .real-switch .p1{left:27px}.component.physical .real-switch .p2{right:27px}
.component.physical .real-switch .post:after{content:"";position:absolute;left:2px;right:2px;top:-4px;height:8px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#f5f8fa,#7a8994 48%,#253440 54%)}
.component.physical .real-switch .blade{left:34px;top:31px;width:56px;height:6px;border:0;border-radius:4px;background:linear-gradient(#e8eef2 0 35%,#738494 38% 70%,#25333f 72%);transform:rotate(-47deg);box-shadow:0 2px 2px #10161d;z-index:2}
.component.physical .real-switch .blade:after{content:"";position:absolute;right:-11px;top:-5px;width:22px;height:16px;border-radius:7px;background:linear-gradient(90deg,#101720,#465563 45%,#101720);box-shadow:inset 0 1px 2px rgba(255,255,255,.25)}
.component.physical .real-switch .blade.closed{transform:rotate(0deg)}

/* The palette uses the same physical drawings, scaled down instead of reverting to icons. */
.palette-symbol .real-rheostat,.palette-symbol .real-switch{transform:scale(.68);transform-origin:center}
.palette-symbol .real-rheostat{position:relative;width:108px;height:66px;filter:drop-shadow(0 5px 3px rgba(22,35,48,.2))}
.palette-symbol .real-rheostat:before,.palette-symbol .real-rheostat:after{content:"";position:absolute;bottom:8px;width:9px;height:38px;border:2px solid #65717e;background:linear-gradient(90deg,#2f3943,#c1cbd2 44%,#343f49);clip-path:polygon(20% 0,100% 0,80% 100%,0 100%);box-shadow:12px 0 0 -2px #72808a}.palette-symbol .real-rheostat:before{left:5px}.palette-symbol .real-rheostat:after{right:5px;transform:scaleX(-1)}
.palette-symbol .real-rheostat .coil{position:absolute;left:20px;right:20px;bottom:19px;height:25px;border-radius:12px;background:repeating-linear-gradient(90deg,#121923 0 2px,#3c4650 2px 4px,#0a111a 4px 6px);border:3px solid #4c5965}.palette-symbol .real-rheostat .coil:after{content:"";position:absolute;left:-17px;top:-20px;width:100px;border-top:3px solid #111923;z-index:4}.palette-symbol .real-rheostat .slider{position:absolute;top:5px;left:47px;width:17px;height:34px;border-radius:3px;background:linear-gradient(90deg,#273541,#aab6c0 38%,#43505d 62%,#17222d);z-index:2}
.palette-symbol .real-rheostat .slider:before{content:"";position:absolute;left:4px;top:-7px;width:8px;height:10px;background:#17212b;transform:skew(-18deg)}
.palette-symbol .real-switch{position:relative;width:108px;height:66px}.palette-symbol .real-switch:after{content:"";position:absolute;left:1px;right:1px;bottom:3px;height:20px;border:2px solid #6d7880;background:linear-gradient(145deg,#f1f3f3,#abb5b9 50%,#647079);clip-path:polygon(10% 0,100% 0,88% 100%,0 100%)}.palette-symbol .real-switch .post{position:absolute;top:30px;width:12px;height:20px;background:linear-gradient(90deg,#263541,#bcc8d0 44%,#42515d);z-index:1}.palette-symbol .real-switch .p1{left:27px}.palette-symbol .real-switch .p2{right:27px}.palette-symbol .real-switch .blade{position:absolute;left:34px;top:31px;width:56px;height:6px;border-radius:4px;background:linear-gradient(#e8eef2 0 35%,#738494 38% 70%,#25333f 72%);transform:rotate(-47deg);z-index:2}.palette-symbol .real-switch .blade:after{content:"";position:absolute;right:-11px;top:-5px;width:22px;height:16px;border-radius:7px;background:#1d2832}
.toast{position:fixed;left:50%;bottom:48px;transform:translate(-50%,20px);padding:10px 17px;border-radius:9px;background:#17345d;color:#fff;font-size:12px;opacity:0;pointer-events:none;transition:.25s;z-index:20;box-shadow:var(--shadow)}.toast.show{opacity:1;transform:translate(-50%,0)}
dialog{width:430px;border:0;border-radius:17px;padding:27px 30px;color:var(--ink);box-shadow:0 24px 80px rgba(18,43,83,.3)}dialog::backdrop{background:rgba(13,32,62,.5);backdrop-filter:blur(3px)}.dialog-close{position:absolute;right:15px;top:12px;border:0;background:transparent;font-size:24px;color:#8491a5}.dialog-badge{font-size:10px;color:#2663cc;background:#eaf2ff;border-radius:10px;padding:4px 9px}dialog h2{margin:15px 0}dialog ol{padding:0;list-style:none;counter-reset:steps}dialog li{counter-increment:steps;position:relative;padding:0 0 18px 45px}dialog li:before{content:counter(steps);position:absolute;left:0;top:0;width:30px;height:30px;display:grid;place-items:center;border-radius:50%;background:#eaf2ff;color:#2868d4;font-weight:bold}dialog li b,dialog li span{display:block}dialog li span{margin-top:3px;color:#71809a;font-size:11px;line-height:1.5}
@media(max-width:1250px){.app-shell{grid-template-columns:205px minmax(600px,1fr) 245px}.topbar{grid-template-columns:270px 1fr 270px}.palette-item{min-height:84px}}