/* RFCheck Design System v1 — offline, harmonized across all six pages.
   Primary blue: deliberate actions; teal: selected/positive engineering states;
   amber: attention only; semantic red: errors. */
:root {
 --rf-ink:#152840;--rf-ink-2:#344a61;--rf-muted:#56697e;
 --rf-primary:#2765a0;--rf-primary-dark:#184c7d;
 --rf-teal:#08796d;--rf-teal-dark:#075c54;
 --rf-warning:#8b4e13;--rf-danger:#a63737;
 --rf-page:#f3f6fa;--rf-paper:#ffffff;--rf-soft:#f7f9fc;
 --rf-line:#d9e3ed;--rf-focus:#277ac2;
 --rf-radius:13px;--rf-shadow:0 5px 20px rgba(20,49,76,.055);
}
html{scroll-padding-top:78px}
body,.calc-page,.ref-page,.guide-page-v2,.policy-page{background:var(--rf-page);color:var(--rf-ink)}
.topbar{background:rgba(255,255,255,.98);border-bottom:1px solid var(--rf-line);box-shadow:0 2px 12px rgba(14,43,76,.035)}
.topbar .brand{color:var(--rf-ink)}
.topbar .brand>span{background:#234f82;color:#fff}
.topbar .site-nav>a,.topbar .site-nav-more>summary{color:var(--rf-ink-2)}
.topbar .site-nav>a:hover,.topbar .site-nav-more>summary:hover{color:var(--rf-primary-dark)}
.topbar .site-nav .nav-active{color:var(--rf-primary-dark);font-weight:800}
.topbar .site-nav-menu{background:var(--rf-paper);border-color:var(--rf-line);box-shadow:0 15px 33px rgba(15,41,70,.13)}
.local-pill{background:#e5f3f0;border-color:#c1e3dc;color:var(--rf-teal-dark)}
.local-pill i{background:var(--rf-teal)}
:where(button,a,input,select,textarea,summary):focus-visible{outline:3px solid var(--rf-focus);outline-offset:3px}
:where(button,a,summary){-webkit-tap-highlight-color:transparent}
:where(.workspace,.main-panel,.calc-main,.ref-main,.guide-reader,.policy-main){min-width:0}
:where(.calc-card,.calc-reference,.ref-topic,.ref-aside,.ref-end,.guide-reader,.privacy-card){border-color:var(--rf-line);box-shadow:var(--rf-shadow)}
:where(.hero h1,.calc-intro h1,.ref-hero h1,.ref-topic h2){color:var(--rf-ink);letter-spacing:-.035em}
:where(.hero p,.calc-intro p,.ref-hero p){color:var(--rf-muted)}
/* Calculator discovery: category selected, choices neutral and scan-friendly. */
.calc-page .calc-intro{margin-bottom:24px}
.calc-page .calc-category-tabs{border-bottom:1px solid var(--rf-line);padding-bottom:12px;gap:8px}
.calc-page .calc-category-tabs button{background:var(--rf-paper);color:var(--rf-ink-2);border:1px solid var(--rf-line);font-size:13px;font-weight:700;min-height:44px}
.calc-page .calc-category-tabs button[aria-pressed="true"]{background:var(--rf-primary-dark);border-color:var(--rf-primary-dark);color:#fff;box-shadow:0 2px 6px rgba(24,76,125,.16)}
.calc-page .calc-tool-browser{border:1px solid var(--rf-line);background:var(--rf-soft);border-radius:var(--rf-radius)}
.calc-page .calc-tool-browser .calc-tool-pills button{border-color:var(--rf-line);background:var(--rf-paper);min-height:78px;gap:7px;transition:border-color .15s,background .15s,box-shadow .15s}
.calc-page .calc-tool-browser .calc-tool-pills button:hover{border-color:#77a7c8;background:#f0f7fc}
.calc-page .calc-tool-browser .calc-tool-pills button[aria-pressed="true"]{background:#e5f3f0;border-color:#51a89e;box-shadow:inset 3px 0 var(--rf-teal)}
.calc-page .calc-tool-title{font-size:14px;color:var(--rf-ink);font-weight:750;line-height:1.4}
.calc-page .calc-tool-browser .calc-tool-pills small{font-size:12px;color:var(--rf-muted);line-height:1.45}
.calc-page .calc-group-heading strong{color:var(--rf-ink);font-size:14px}
.calc-page .calc-group-heading span{font-size:12px;color:var(--rf-muted)}
.calc-page .calc-field>span{font-size:13px;color:var(--rf-ink-2)}
.calc-page .calc-number:focus-within{border-color:var(--rf-primary);box-shadow:0 0 0 3px rgba(39,101,160,.12)}
.calc-page .calc-formula{background:var(--rf-soft);border-color:var(--rf-line);align-items:flex-start}
.calc-page .calc-formula>span{font-size:12px;color:var(--rf-muted)}
.calc-page .calc-formula>strong,.calc-page .calc-formula math{color:var(--rf-ink);font-weight:550;line-height:1.6}
/* Reference: typographic reading width, explicit math surfaces, accessible diagrams. */
.ref-page .ref-hero{padding-top:42px;max-width:950px}
.ref-page .ref-hero h1{font-size:clamp(31px,4vw,48px);line-height:1.13}
.ref-page .ref-hero p{color:var(--rf-ink-2);font-size:16px;line-height:1.7}
.ref-page .ref-shell{gap:24px}
.ref-page .ref-aside{border-color:var(--rf-line);box-shadow:var(--rf-shadow);top:78px;max-height:calc(100vh - 94px)}
.ref-page .ref-aside-head strong{font-size:16px;color:var(--rf-ink)}
.ref-page .ref-toc a{color:var(--rf-muted);font-size:12px;padding-block:9px}
.ref-page .ref-toc a span{font-size:13.5px;color:var(--rf-ink-2);font-weight:650}
.ref-page .ref-toc a[aria-current="location"]{background:#e5f3f0;color:var(--rf-teal-dark)}
.ref-page .ref-toc a[aria-current="location"] span{color:var(--rf-teal-dark)}
.ref-page .ref-topic{border-color:var(--rf-line);box-shadow:var(--rf-shadow);padding:clamp(18px,2.5vw,34px)}
.ref-page .ref-topic p{color:var(--rf-ink-2);font-size:16px;line-height:1.75;max-width:78ch}
.ref-page .ref-topic .ref-lead{color:var(--rf-ink);font-size:16.5px;line-height:1.73;max-width:74ch}
.ref-page .ref-topic h2{font-size:clamp(24px,2.7vw,31px);line-height:1.28}
.ref-page .ref-equation{border:1px solid var(--rf-line);background:var(--rf-soft);border-radius:11px;padding:clamp(12px,1.6vw,19px)}
.ref-page .ref-equation>math,.ref-page math.rf-math{font-family:"Cambria Math","STIX Two Math","DejaVu Serif",serif;color:var(--rf-ink);font-weight:400;font-size:clamp(18px,1.7vw,23px)}
.ref-page .ref-equation>math{overflow-x:auto;overflow-y:hidden;max-width:100%}
.ref-page .ref-example{background:#f2f7fb;border-color:#bfd5e4;border-left-color:var(--rf-primary)}
.ref-page .ref-example>strong{color:var(--rf-primary-dark);font-size:13px}
.ref-page .ref-boundary{border-top-color:var(--rf-line);color:var(--rf-ink-2);font-size:14px;line-height:1.72}
.ref-page .ref-boundary strong{color:var(--rf-warning);font-weight:800}
.ref-page .ref-grid>div{background:var(--rf-soft);border-color:var(--rf-line)}
.ref-page .ref-grid b{font-size:14px;color:var(--rf-ink)}
.ref-page .ref-grid span{font-size:13.5px;color:var(--rf-ink-2);line-height:1.65}
.ref-page .ref-wave-figure{background:var(--rf-soft);border-color:var(--rf-line)}
.ref-page .ref-wave-case{border-color:var(--rf-line)}
.ref-page .ref-wave-track{background:#fff;border-color:var(--rf-line)}
.ref-page .ref-wave-ratios{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.ref-page .ref-wave-ratio{display:grid;grid-template-columns:minmax(100px,auto) 1fr;align-items:center;gap:10px}
.ref-page .ref-wave-ratio math{font-family:"Cambria Math","STIX Two Math","DejaVu Serif",serif;font-weight:400}
.ref-page .ref-wave-ratio>span{color:var(--rf-ink-2);font-size:13px}
.ref-page .ref-matrix{align-items:center}
.ref-page .ref-matrix span{min-width:0}
.ref-page .ref-matrix math{font-family:"Cambria Math","STIX Two Math","DejaVu Serif",serif;font-weight:400}
.ref-page .ref-derivation{background:#f2f8fc;border-color:#bbd4e5;border-left-color:var(--rf-primary)}
.ref-page .ref-derivation>p{font-size:15px;line-height:1.75}
/* Guide teaching text and equations: real text, not 8-10 px micro-labels. */
.guide-page-v2 .guide-equation-v2 span{font-size:11px;letter-spacing:.045em}
.guide-page-v2 .guide-equation-v2 small{font-size:12px;line-height:1.62;color:var(--rf-ink-2)}
.guide-page-v2 .guide-equation-v2 math.guide-math{font-size:clamp(18px,1.7vw,22px);color:var(--rf-ink)}
.guide-page-v2 .guide-equation-v2{border-color:var(--rf-line);background:var(--rf-soft)}
.guide-page-v2 .guide-equation-v2 b{font-family:inherit;color:var(--rf-ink)}
.guide-page-v2 .guide-reader-eyebrow{color:var(--rf-primary-dark)}
/* Policy pages stay on the same color and content scale. */
.policy-page main :where(p,li){color:var(--rf-ink-2);line-height:1.72}
@media(max-width:980px){
 .ref-page .ref-shell{gap:15px}
 .ref-page .ref-aside{top:78px}
}
@media(max-width:760px){
 .ref-page .ref-aside{position:static;max-height:none}
 .ref-page .ref-wave-ratios{grid-template-columns:minmax(0,1fr)}
 .ref-page .ref-wave-ratio{grid-template-columns:110px minmax(0,1fr)}
 .ref-page .ref-topic p{font-size:15px}
}
@media(max-width:390px){
 .ref-page .ref-main{padding-left:8px;padding-right:8px}
 .ref-page .ref-topic{padding:14px}
 .ref-page .ref-wave-path{grid-template-columns:minmax(0,1fr) 58px minmax(0,1fr);gap:4px;padding:9px 6px}
 .ref-page .ref-wave-track{padding:6px 4px;grid-template-columns:minmax(0,1fr) 17px;gap:3px}
 .ref-page .ref-wave-track small{font-size:10px;overflow-wrap:anywhere}
 .ref-page .ref-wave-arrow{font-size:17px}
 .ref-page .ref-wave-ratio{grid-template-columns:1fr;gap:3px}
 .ref-page .ref-topic .ref-lead{font-size:15px}
 .ref-page .ref-equation>math,.ref-page math.rf-math{font-size:17px}
 .calc-page .calc-tool-title{font-size:13px}
 .calc-page .calc-category-tabs button{font-size:12px}
}
@media(prefers-reduced-motion:reduce){
 .calc-page .calc-tool-browser .calc-tool-pills button{transition:none}
}

/* Narrow native-select readability: labels carry full context outside the choice. */
@media(max-width:390px){
 .calc-page .calc-field select{box-sizing:border-box;width:100%;min-width:0;font-size:14px;padding-right:22px}
 .calc-page #lcSolve{font-size:14px}
 .calc-page .calc-card-heading{gap:9px}
 .calc-page .calc-card-heading .calc-learn{max-width:100%;overflow-wrap:anywhere;white-space:normal}
 .ref-page .ref-equation math,.ref-page .ref-matrix math{max-width:100%;overflow-x:auto}
 .ref-page .ref-wave-port>b{letter-spacing:0}
}

/* Under-320px diagnostic viewports must not inherit the legacy 320px body floor. */
@media(max-width:319px){body{min-width:0}}

/* MathML fractions need their intrinsic vertical extent, while narrow formulas
   retain horizontal swipe. Never expose an implicit vertical scrollbar: the
   Windows classic scroll arrows overlap the equation glyphs. */
.calc-page .calc-formula .calc-math-content{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;min-width:0;max-width:100%;padding-block:6px;overflow-x:auto;overflow-y:hidden;overscroll-behavior-x:contain}
.calc-page .calc-formula math.calc-math{font-family:"Cambria Math","STIX Two Math","DejaVu Serif",serif;font-size:clamp(16px,1.65vw,19px);font-weight:400;line-height:normal;flex:none;color:var(--rf-ink)}

/* Smith teaching workbench: zero autoplay, state-driven engineering geometry. */
.guide-page-v2 .smith-lesson-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin:17px 0 9px}
.guide-page-v2 .smith-lesson-steps button,.guide-page-v2 .smith-perspective button{min-width:0;min-height:42px;white-space:normal;border:1px solid #b8cbdc;border-radius:9px;background:#fff;color:#254866;font-size:12px;line-height:1.4;font-weight:750;padding:8px 10px;cursor:pointer}
.guide-page-v2 .smith-lesson-steps button[aria-pressed="true"],.guide-page-v2 .smith-perspective button[aria-pressed="true"]{background:#e9f4f4;border-color:#287e80;color:#15585b;box-shadow:inset 0 0 0 1px #287e80}
.guide-page-v2 .smith-lesson-steps button:focus-visible,.guide-page-v2 .smith-perspective button:focus-visible{outline:3px solid #2676b8;outline-offset:2px}
.guide-page-v2 .smith-teaching-panel{border:1px solid #cfdfeb;border-left:4px solid #287e80;border-radius:9px;background:#f7fbfd;padding:12px 16px;min-width:0}
.guide-page-v2 .smith-teaching-panel strong{font-size:15px;color:#183f5d}
.guide-page-v2 .smith-teaching-panel p{font-size:13px;line-height:1.65;margin:5px 0 0;color:#3d5568}
.guide-page-v2 .smith-perspective{display:flex;flex-wrap:wrap;gap:8px;border:0;padding:0;margin:0 0 3px;min-width:0}
.guide-page-v2 .smith-perspective legend{font-size:13px;font-weight:800;color:#254866;padding:0 0 7px}
.guide-page-v2 .smith-perspective button{flex:1 1 140px}
.guide-page-v2 .smith-lab .smith-controls>label{font-size:13px;line-height:1.45;grid-template-columns:minmax(0,1fr) 75px}
.guide-page-v2 .smith-lab .smith-controls>label b{font-size:12px}
.guide-page-v2 .smith-lab .smith-numbers span{font-size:11.5px;line-height:1.4;color:#53697e}
.guide-page-v2 .smith-lab .smith-numbers strong{font-size:12px;line-height:1.45;overflow-wrap:anywhere}
.guide-page-v2 .smith-lab .smith-numbers>div{padding:11px;min-width:0}
.guide-page-v2 .guide-smith-travel{fill:none;stroke:#2a7980;stroke-width:3;stroke-linecap:round;opacity:.9}
.guide-page-v2 .guide-smith-start-dot{fill:#1c7892;stroke:#fff;stroke-width:3}
.guide-page-v2 #guideSmithSvg .guide-smith-dot{animation:none!important;transition:none!important}
.guide-page-v2 .smith-grid-key{font-size:13px;line-height:1.6}
@media(max-width:700px){.guide-page-v2 .smith-lesson-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.guide-page-v2 .smith-lab{padding:10px;gap:12px}}
@media(max-width:340px){.guide-page-v2 .smith-lesson-steps{grid-template-columns:1fr}.guide-page-v2 .smith-lab .smith-numbers{grid-template-columns:1fr}}

/* Smith single-frequency matching lesson: source-verified element arcs, no autoplay. */
.guide-page-v2 .smith-match-workbench{border:1px solid #cbdde8;background:#f6fafc;border-radius:13px;margin:16px 0;padding:16px;min-width:0}
.guide-page-v2 .smith-match-title{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px}
.guide-page-v2 .smith-match-title>div{flex:1 1 250px;min-width:0}
.guide-page-v2 .smith-match-title h3{font-size:18px;margin:0 0 5px;color:#18364e}
.guide-page-v2 .smith-match-title p{font-size:13px;line-height:1.6;margin:0;color:#3c5568}
.guide-page-v2 .smith-match-mode,.guide-page-v2 .smith-match-presets,.guide-page-v2 .smith-match-steps{display:flex;flex-wrap:wrap;gap:8px}
.guide-page-v2 .smith-match-mode button,.guide-page-v2 .smith-match-presets button,.guide-page-v2 .smith-match-steps button{border:1px solid #a8c3d5;border-radius:8px;background:#fff;color:#1c425e;font-size:13px;line-height:1.4;font-weight:750;min-height:42px;padding:8px 11px;cursor:pointer}
.guide-page-v2 .smith-match-mode button[aria-pressed="true"],.guide-page-v2 .smith-match-steps button[aria-pressed="true"]{background:#e0f3f2;border-color:#218080;box-shadow:inset 0 0 0 1px #218080}
.guide-page-v2 .smith-match-workbench button:focus-visible,.guide-page-v2 .smith-match-workbench select:focus-visible,.guide-page-v2 .smith-match-workbench input:focus-visible{outline:3px solid #236db0;outline-offset:2px}
.guide-page-v2 .smith-match-body{margin-top:15px;display:grid;gap:12px;min-width:0}
.guide-page-v2 .smith-match-body[hidden]{display:none}
.guide-page-v2 .smith-match-inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.guide-page-v2 .smith-match-inputs label{min-width:0;font-size:13px;font-weight:700;color:#214764;display:grid;gap:6px}
.guide-page-v2 .smith-match-inputs input,.guide-page-v2 .smith-match-inputs select{width:100%;max-width:100%;box-sizing:border-box;min-height:43px;border:1px solid #acc4d7;border-radius:8px;background:#fff;padding:7px;font-size:14px;color:#173b54}
.guide-page-v2 .smith-match-steps button{flex:1 1 140px}
.guide-page-v2 .smith-match-steps button:disabled{opacity:.5;cursor:not-allowed}
.guide-page-v2 .smith-match-status{font-size:13px;color:#284d65;line-height:1.6;margin:0}
.guide-page-v2 .smith-match-explainer{border-left:3px solid #218080;padding:9px 13px;background:#fff;border-radius:6px;display:grid;gap:7px;min-width:0}
.guide-page-v2 .smith-match-explainer strong{font-size:14px;line-height:1.65}
.guide-page-v2 .smith-match-explainer span{font-size:13px;line-height:1.6}
.guide-page-v2 .smith-match-readouts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.guide-page-v2 .smith-match-readouts>div{display:grid;gap:5px;padding:10px;background:#fff;border:1px solid #d8e4ea;border-radius:8px;min-width:0}
.guide-page-v2 .smith-match-readouts span{font-size:12px;color:#4b6072}
.guide-page-v2 .smith-match-readouts strong{font-size:13px;color:#204660;overflow-wrap:anywhere}
.guide-page-v2 .smith-match-limit{font-size:12.5px;line-height:1.65;color:#465c70;margin:0}
.guide-page-v2 #guideSmithSvg .smith-match-arc{fill:none;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}
.guide-page-v2 #guideSmithSvg .smith-match-arc.first{stroke:#476cba}
.guide-page-v2 #guideSmithSvg .smith-match-arc.second{stroke:#24816b}
.guide-page-v2 #guideSmithSvg .smith-match-load{fill:#315fad;stroke:#fff;stroke-width:3}
.guide-page-v2 #guideSmithSvg .smith-match-intermediate{fill:#8762a5;stroke:#fff;stroke-width:3}
.guide-page-v2 #guideSmithSvg .smith-match-current{fill:#158062;stroke:#fff;stroke-width:3}
@media(max-width:620px){.guide-page-v2 .smith-match-workbench{padding:11px}.guide-page-v2 .smith-match-inputs,.guide-page-v2 .smith-match-readouts{grid-template-columns:1fr}}

/* V7: give MathML fences enough intrinsic room and a scroll-safe end margin. */
.calc-page .calc-formula .calc-math-content{padding-inline:10px 16px;scroll-padding-inline:10px 16px}
.calc-page .calc-formula math.calc-math{direction:ltr;unicode-bidi:isolate;padding-inline:2px 6px;max-width:none}

/* Linked multi-DUT cursors — subdued Light/Dark surfaces, horizontally scrollable data. */
.linked-compare{margin:12px 0;border:1px solid var(--rf-line);border-radius:12px;background:var(--rf-paper);color:var(--rf-ink);min-width:0}
.linked-compare[hidden]{display:none}
.linked-compare>summary{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:13px 16px;cursor:pointer;color:var(--rf-ink)}
.linked-compare>summary strong{font-size:14px}.linked-compare>summary span{font-size:12px;color:var(--rf-muted)}
.linked-compare-controls{display:flex;gap:12px;align-items:end;flex-wrap:wrap;padding:9px 16px}
.linked-compare-controls label{display:grid;gap:5px;color:var(--rf-ink-2);font-weight:700;font-size:12px}
.linked-compare-controls select{min-height:40px;max-width:min(100%,280px);padding:8px 10px;border:1px solid var(--rf-line);background:var(--rf-paper);color:var(--rf-ink);border-radius:8px}
.linked-compare-status{padding:0 16px;font-size:12px;color:var(--rf-muted);line-height:1.55}
.linked-compare-scroll{max-width:100%;overflow:auto;margin:8px 12px 0;border:1px solid var(--rf-line);border-radius:9px}
.linked-compare-table{width:100%;min-width:825px;border-collapse:collapse;font-size:12px;color:var(--rf-ink)}
.linked-compare-table th{text-align:left;white-space:nowrap;background:var(--rf-soft);color:var(--rf-ink-2);font-weight:800}
.linked-compare-table th,.linked-compare-table td{padding:9px 11px;border-bottom:1px solid var(--rf-line);font-variant-numeric:tabular-nums}
.linked-compare-table td:first-child{max-width:210px;overflow-wrap:anywhere}
.linked-compare-table .linked-reference-row{background:var(--rf-soft)}
.linked-compare-footnote{display:block;padding:11px 16px 14px;color:var(--rf-muted);line-height:1.55}
@media(max-width:620px){.linked-compare-controls{display:grid;grid-template-columns:1fr}.linked-compare-controls select{width:100%;max-width:none}}

/* V10B opt-in waveform cursor dock. Light/Dark use semantic surfaces. */
.cursor-dock[hidden],.cursor-compare[hidden]{display:none!important}
.cursor-add-group{display:flex;align-items:center;flex:none}
.cursor-add-group .cursor-add{white-space:nowrap;min-height:36px;border-color:var(--rf-line);color:var(--rf-primary-dark);font-weight:750}
.cursor-dock{margin:8px 0 12px;padding:11px 13px;border:1px solid var(--rf-line);border-radius:12px;background:var(--rf-paper);color:var(--rf-ink);min-width:0}
.cursor-dock-main{display:flex;align-items:end;flex-wrap:wrap;gap:8px 12px}
.cursor-dock-caption{font-size:10px;letter-spacing:.10em;font-weight:850;color:var(--rf-muted);align-self:center}
.cursor-tabs{display:flex;gap:5px;align-items:center;flex-wrap:wrap;max-width:260px}
.cursor-tab{min-height:35px;padding:7px 12px;border:1px solid var(--rf-line);border-radius:8px;background:var(--rf-paper);color:var(--rf-ink-2);font-size:12px;font-weight:800;cursor:pointer}
.cursor-tab.is-active{border-color:var(--cursor-accent);box-shadow:inset 0 0 0 1px var(--cursor-accent);color:var(--rf-ink)}
.cursor-tab.is-active:before{content:"";display:inline-block;width:7px;height:7px;margin-inline-end:6px;border-radius:50%;background:var(--cursor-accent)}
.cursor-field{display:grid;gap:4px;font-size:11px;font-weight:750;color:var(--rf-muted);min-width:0}
.cursor-field select,.cursor-field input,.cursor-compare-controls select{background:var(--rf-paper);border:1px solid var(--rf-line);color:var(--rf-ink);border-radius:8px;min-height:35px;padding:6px 9px;font-size:12px}
.cursor-field select{max-width:190px}.cursor-field.cursor-freq input{width:130px}
.cursor-dock-main>.tool-button{min-height:35px}
#cursorPlacement[aria-pressed="true"]{border-color:var(--rf-teal);color:var(--rf-teal-dark);background:var(--rf-soft)}
.cursor-readout{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin-top:11px;padding:9px 11px;border:1px solid var(--rf-line);border-radius:8px;background:var(--rf-soft);min-height:42px}
.cursor-readout-badge{padding:5px 9px;border-radius:6px;border-inline-start:3px solid var(--cursor-accent);color:var(--rf-ink);font-size:12px}
.cursor-readout-frequency{font-variant-numeric:tabular-nums;font-size:14px;color:var(--rf-ink)}
.cursor-readout-value{font-variant-numeric:tabular-nums;font-size:15px;color:var(--rf-primary-dark)}
.cursor-readout-source{font-size:11px;color:var(--rf-muted);overflow-wrap:anywhere}
.cursor-compare{margin-top:9px;border-top:1px solid var(--rf-line);padding-top:7px;font-size:12px}
.cursor-compare summary{cursor:pointer;color:var(--rf-ink-2);font-weight:750;list-style-position:inside}
.cursor-compare summary span{font-weight:500;color:var(--rf-muted)}
.cursor-compare-controls{display:flex;flex-wrap:wrap;align-items:end;gap:10px;padding-top:10px}
.cursor-compare-controls label{display:grid;gap:5px;font-weight:700;color:var(--rf-muted)}
.cursor-compare-controls select{max-width:220px}
.cursor-compare-controls output{flex:1 1 230px;overflow-wrap:anywhere;color:var(--rf-ink-2);line-height:1.4}
.waveform-cursor-box{fill:var(--rf-paper);stroke:var(--rf-line);stroke-width:1.3}
.waveform-cursor-title{fill:var(--rf-ink);font-weight:800;font-size:13px}
.waveform-cursor-value{fill:var(--rf-primary-dark);font-weight:800;font-size:15px}
.smith-cursor-label{font-size:16px;font-weight:800}
@media(max-width:620px){.cursor-dock{padding:10px}.cursor-dock-main{align-items:stretch}.cursor-field{flex:1 1 135px}.cursor-field select,.cursor-field.cursor-freq input{max-width:100%;width:100%}.cursor-compare-controls label{flex:1 1 150px}.cursor-compare-controls select{max-width:100%;width:100%}}

/* V11 restrained plot-left cursor rail, independent of marker toolbars */
.plot-cursor-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:10px;align-items:start;min-width:0}
.plot-cursor-layout.has-cursor-rail{grid-template-columns:182px minmax(0,1fr)}
.plot-cursor-layout .plot-card{min-width:0}
.cursor-rail[hidden],.cursor-editor[hidden],.cursor-idle[hidden],#cursorFrequencyLabel[hidden],#cursorLevelLabel[hidden]{display:none!important}
.cursor-rail{min-width:0;background:var(--rf-paper);border:1px solid var(--rf-line);border-radius:10px;padding:10px;color:var(--rf-ink)}
.cursor-rail-head{display:flex;flex-direction:column;gap:2px;padding-bottom:8px;border-bottom:1px solid var(--rf-line);font-size:13px}
.cursor-rail-head small{font-size:10px;font-weight:450;color:var(--rf-muted)}
.cursor-rail .cursor-tabs{display:flex;flex-wrap:wrap;gap:5px;margin:9px 0;max-width:none}
.cursor-rail .cursor-tab{padding:6px 8px;min-height:30px;font-size:11px}
.cursor-editor{display:grid;gap:9px;border-top:1px solid var(--rf-line);padding-top:9px;min-width:0}
.cursor-editor label,.cursor-delta-panel label{display:grid;gap:4px;font-size:10px;font-weight:700;color:var(--rf-muted);min-width:0}
.cursor-editor select,.cursor-editor input{min-width:0;width:100%;background:var(--rf-paper);color:var(--rf-ink);border:1px solid var(--rf-line);border-radius:7px;min-height:34px;padding:5px 7px;font-size:11px}
.cursor-editor input{font-variant-numeric:tabular-nums}
.cursor-rail-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:3px}
.cursor-rail-actions button{min-width:0;padding:7px 2px;border:1px solid var(--rf-line);border-radius:6px;background:var(--rf-soft);color:var(--rf-ink-2);font-size:10px;cursor:pointer}
.cursor-rail-actions button[aria-pressed="true"]{border-color:var(--rf-teal);color:var(--rf-teal-dark)}
.cursor-rail-reading{font-variant-numeric:tabular-nums;font-weight:800;font-size:12px;line-height:1.55;overflow-wrap:anywhere;color:var(--rf-primary-dark);border:1px solid var(--rf-line);border-radius:8px;padding:8px;background:var(--rf-soft)}
.cursor-live{display:block;font-size:11px;font-variant-numeric:tabular-nums;color:var(--rf-teal-dark)}
.cursor-idle{font-size:11px;color:var(--rf-muted);line-height:1.5}
.cursor-delta-panel{display:grid;gap:6px;border-top:1px solid var(--rf-line);padding-top:9px}
.cursor-delta-readout{font-variant-numeric:tabular-nums;color:var(--rf-ink);font-size:11px;line-height:1.5;overflow-wrap:anywhere}
.cursor-inline-label{font-size:12px;font-weight:800;paint-order:stroke;stroke:var(--rf-paper);stroke-width:3px;stroke-linejoin:round}
@media(max-width:840px){.plot-cursor-layout.has-cursor-rail{grid-template-columns:minmax(0,1fr)}.cursor-rail{order:2}.plot-cursor-layout .plot-card{order:1}.cursor-editor{grid-template-columns:repeat(2,minmax(0,1fr));align-items:end}.cursor-delta-panel,.cursor-rail-actions,.cursor-rail-reading{grid-column:1/-1}}
@media(max-width:460px){.cursor-editor{grid-template-columns:minmax(0,1fr)}.cursor-delta-panel,.cursor-rail-actions,.cursor-rail-reading{grid-column:auto}}

/* V11E: Delta math is a two-line primary readout, not cramped inline text. */
.cursor-delta-readout{white-space:pre-line;font-size:12px;font-weight:800;line-height:1.75;color:var(--rf-primary-dark)}

/* V12 compact overlay: the plot never changes dimensions when Cursors open. */
.plot-cursor-layout,.plot-cursor-layout.has-cursor-rail{display:block;position:relative;min-width:0}
.plot-cursor-layout .plot-card{width:100%;min-width:0}
.plot-cursor-layout .cursor-rail{position:absolute;z-index:12;left:9px;top:76px;width:204px;max-height:min(530px,calc(100% - 90px));overflow-y:auto;overscroll-behavior:contain;box-shadow:0 10px 30px rgba(20,40,70,.16)}
.plot-cursor-layout .cursor-rail[hidden]{display:none!important}
.cursor-rail-head{flex-direction:row;align-items:center;justify-content:space-between}
.cursor-rail-close{background:transparent;color:var(--rf-muted);border:1px solid var(--rf-line);border-radius:6px;min-width:26px;min-height:26px;cursor:pointer}
.cursor-color-row{display:flex!important;align-items:center;justify-content:space-between}
.cursor-color-row input{width:42px!important;height:30px!important;min-height:30px!important;padding:2px!important;cursor:pointer}
.cursor-sweep-panel{border-top:1px solid var(--rf-line);padding-top:9px;min-width:0;display:grid;gap:6px}
.cursor-sweep-title{font-size:12px;color:var(--rf-ink)}
.cursor-sweep-status{font-size:10px;color:var(--rf-muted);overflow-wrap:anywhere}
.cursor-sweep-rows{display:grid;gap:6px}
.cursor-sweep-item{min-width:0;border:1px solid var(--rf-line);border-radius:8px;padding:7px;background:var(--rf-soft);display:grid;gap:5px}
.cursor-sweep-item.is-reference{border-inline-start:3px solid var(--rf-teal)}
.cursor-sweep-head,.cursor-sweep-numbers{display:flex;align-items:center;justify-content:space-between;gap:6px}
.cursor-sweep-head{min-width:0}
.cursor-sweep-name{font-size:10px;color:var(--rf-ink-2);text-overflow:ellipsis;white-space:nowrap;overflow:hidden;min-width:0}
.cursor-sweep-head small{font-size:9px;color:var(--rf-muted);flex:none}
.cursor-sweep-numbers{flex-wrap:wrap;font-variant-numeric:tabular-nums}
.cursor-sweep-numbers strong{font-size:12px;color:var(--rf-ink)}
.cursor-sweep-delta{font-size:11px;font-weight:750;color:var(--rf-primary-dark)}
.cursor-sweep-na{font-size:10px;color:var(--rf-muted)}
@media(max-width:840px){.plot-cursor-layout.has-cursor-rail{display:block}.plot-cursor-layout .cursor-rail{position:absolute;top:56px;left:6px;width:min(205px,calc(100% - 12px));max-height:400px}.plot-cursor-layout .plot-card{order:initial}}
@media(max-width:500px){.plot-cursor-layout .cursor-rail{width:min(200px,calc(100% - 12px));max-height:340px}.cursor-editor{display:grid;grid-template-columns:minmax(0,1fr)}}

/* V12D sample provenance and trace association without additional panels */
.cursor-sweep-head small{white-space:nowrap;font-size:9px}.cursor-sweep-item{border-inline-start-width:3px}

/* No inert cursor toggle before the user adds a cursor. */
#toggleCursorRail[hidden]{display:none!important}

/* V13: fixed reserved sidebar: never overlay or resize the plot on toggle */
.plot-cursor-layout,.plot-cursor-layout.has-cursor-rail{display:grid;grid-template-columns:248px minmax(0,1fr);gap:12px;align-items:stretch;position:relative;min-width:0}
.plot-cursor-layout .plot-card{grid-column:2;width:100%;min-width:0}
.cursor-slot{grid-column:1;min-width:0;min-height:0;align-self:stretch;position:relative}
.plot-cursor-layout .cursor-rail{position:relative;inset:auto;z-index:auto;box-shadow:none;width:100%;height:100%;max-height:100%;min-height:0;overflow:hidden;display:flex;flex-direction:column;gap:8px;overscroll-behavior:auto;padding:11px;border-radius:11px}
.plot-cursor-layout .cursor-rail[hidden]{display:none!important}
.cursor-placeholder{min-height:100%;display:flex;flex-direction:column;gap:8px;padding:13px;border:1px dashed var(--rf-line);border-radius:10px;background:var(--rf-soft);color:var(--rf-muted);font-size:11px}
.cursor-placeholder strong{letter-spacing:.08em;color:var(--rf-ink-2);font-size:10px}
.cursor-placeholder[hidden]{display:none!important}
.cursor-editor{display:flex;flex-direction:column;min-height:0;overflow:hidden;flex:1;gap:9px}
.cursor-editor>.cursor-editor-row,.cursor-editor>label,.cursor-editor>.cursor-rail-actions,.cursor-editor>.cursor-rail-reading,.cursor-editor>.cursor-live,.cursor-base-explainer{flex-shrink:0}
.cursor-editor select,.cursor-editor input:not([type=color]),.cursor-rail-actions button,.cursor-rail-close{box-sizing:border-box;height:36px;min-height:36px;font-size:11px;border-radius:7px}
.cursor-rail-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}
.cursor-rail-actions button{width:100%;min-width:0;padding:0 3px;font-weight:700}
.cursor-rail .cursor-tab{height:34px;min-height:34px;padding:6px 10px}
.cursor-color-row input[type=color]{height:36px!important;min-height:36px!important;width:50px!important}
.cursor-reference-label-line{display:flex;align-items:center;justify-content:space-between;gap:5px}
.cursor-base-chip,.cursor-role-base{display:inline-flex;align-items:center;border:1px solid var(--rf-teal);color:var(--rf-teal-dark);background:var(--rf-soft);padding:2px 5px;border-radius:5px;font-size:10px;font-weight:850}
.cursor-base-explainer{margin:0;font-size:10px;color:var(--rf-muted);line-height:1.5}
.cursor-sweep-panel{display:flex;flex:1;min-height:0;overflow:hidden;flex-direction:column;gap:6px}
.cursor-sweep-panel>.cursor-sweep-title,.cursor-sweep-status,.cursor-sweep-base-key{flex-shrink:0}
.cursor-sweep-base-key{font-size:10px;color:var(--rf-muted);margin:0}
.cursor-sweep-base-key b{color:var(--rf-teal-dark)}
.cursor-sweep-rows{display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;flex:1;min-height:0;gap:6px;padding-inline-end:3px}
.cursor-sweep-item{flex-shrink:0;padding:8px}
.cursor-sweep-item.is-reference{border:1px solid var(--rf-teal);background:var(--rf-soft)}
.cursor-sweep-name{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;max-width:100%;white-space:normal;overflow-wrap:anywhere;line-height:1.4;font-size:11px}
.cursor-sweep-head{flex-wrap:wrap;align-items:start;gap:4px}
.cursor-sweep-head small{white-space:normal;font-size:10px}
.cursor-sweep-numbers strong{font-size:13px}
.cursor-sweep-ref-badge{display:inline-flex;align-items:center;gap:5px;font-size:10px;color:var(--rf-teal-dark);font-weight:850}
.cursor-sweep-ref-badge::before{content:"◆";font-size:13px}
@media(max-width:900px){.plot-cursor-layout,.plot-cursor-layout.has-cursor-rail{grid-template-columns:218px minmax(0,1fr);gap:8px}}
@media(max-width:680px){.plot-cursor-layout,.plot-cursor-layout.has-cursor-rail{grid-template-columns:minmax(0,1fr)}.cursor-slot{grid-column:1;grid-row:2;min-height:56px}.plot-cursor-layout .plot-card{grid-column:1;grid-row:1}.cursor-placeholder{min-height:55px}.plot-cursor-layout .cursor-rail{height:auto;max-height:550px}.cursor-editor{display:flex;flex-direction:column}.cursor-sweep-rows{max-height:215px}}

/* V13B: three distinct BASE references — file chip, result badge and plot diamond */
.file-base-chip{display:inline-flex;align-self:flex-start;align-items:center;
  font-size:10px;letter-spacing:.04em;font-weight:850;
  background:var(--rf-soft);color:var(--rf-teal-dark);
  border:1px solid var(--rf-teal);border-radius:5px;padding:2px 5px;margin-block:3px}
.cursor-sweep-ref-badge{display:inline-flex;align-items:center;gap:4px;
  font-size:10px;font-weight:850;color:var(--rf-teal-dark)}
.cursor-sweep-ref-badge::before{content:"◆";font-size:13px}
.cursor-base-intersection{stroke-linejoin:round;paint-order:stroke}

/* V15A: analyzer-first layout; maximize chart legibility across desktop sizes. */
.workspace#viewer{width:calc(100% - 32px);max-width:1920px;margin-inline:auto;grid-template-columns:238px minmax(0,1fr)}
.workspace#viewer .sidebar,.workspace#viewer .main-panel{min-width:0}
#plotLayout.plot-cursor-layout,#plotLayout.plot-cursor-layout.has-cursor-rail{grid-template-columns:208px minmax(0,1fr);gap:9px}
#plotLayout .plot-card,#plotLayout .cursor-slot{min-width:0}
#plotLayout svg.rf-plot{display:block;width:100%;height:auto}
@media(max-width:1200px){
 .workspace#viewer{grid-template-columns:210px minmax(0,1fr);width:calc(100% - 24px)}
 #plotLayout.plot-cursor-layout,#plotLayout.plot-cursor-layout.has-cursor-rail{grid-template-columns:190px minmax(0,1fr);gap:7px}
}
@media(max-width:980px){
 #plotLayout.plot-cursor-layout,#plotLayout.plot-cursor-layout.has-cursor-rail{grid-template-columns:minmax(0,1fr);gap:10px}
 #plotLayout .plot-card{grid-column:1;grid-row:1}
 #plotLayout .cursor-slot{grid-column:1;grid-row:2}
 #plotLayout .cursor-rail{height:auto;max-height:490px}
 #plotLayout .cursor-sweep-rows{max-height:220px;flex:0 1 auto}
 #plotLayout .cursor-placeholder{min-height:54px}
}
@media(max-width:760px){.workspace#viewer{display:block;width:calc(100% - 18px);margin-inline:auto}}

/* V15C: explain Smith visual decimation and mixed reference-impedance overlays. */
.plot-card .smith-context .smith-display-policy{
 flex-basis:100%;font-size:10.5px;line-height:1.5;
 color:var(--rf-muted);overflow-wrap:anywhere;
}
.plot-card .smith-bounded-trace{stroke-linejoin:round;stroke-linecap:round}