.unbalanced-lesson { --uf-a:#b45f12; --uf-b:#246fbe; --uf-c:#247b5f; --uf-n:#697482; }
.uf-network,.uf-phasors,.uf-profile,.uf-loading,.uf-code-profile { width:100%; display:block; }
.uf-network text { paint-order:stroke fill; stroke:var(--bf-surface); stroke-width:3px; stroke-linejoin:round; }
.uf-legend { display:flex; flex-wrap:wrap; gap:1.2rem; font-size:.85rem; }
.uf-phase-a { color:var(--uf-a); }.uf-phase-b { color:var(--uf-b); }.uf-phase-c { color:var(--uf-c); }.uf-phase-n { color:var(--uf-n); }
.uf-selectors { grid-template-columns:repeat(3,minmax(0,1fr)); }
.uf-stats { grid-template-columns:repeat(4,minmax(0,1fr)); }
.uf-settings .bf-controls { margin-top:1rem; }
.uf-control:has([data-key="p3_a_kw"]) input { accent-color:var(--uf-a); }
.uf-control:has([data-key="p3_b_kw"]) input { accent-color:var(--uf-b); }
.uf-control:has([data-key="p3_c_kw"]) input { accent-color:var(--uf-c); }
.uf-control:has(input:disabled) { opacity:.55; }
.uf-compare { border-left:3px solid var(--bf-blue); padding:.5rem 1rem; background:#f4f8fb; margin:1.25rem 0; }
.uf-basis-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:1rem; }
.uf-basis-grid svg,.uf-sequence-charts svg { display:block; width:100%; }
.uf-basis-grid h4,.uf-sequence-charts h4 { margin:.15rem 0 .5rem; }
.uf-basis-grid .bf-equation { margin:.5rem 0; padding:.5rem; }
.uf-sequence-charts { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:1rem; margin:1.25rem 0; }
.uf-sequence-charts figure { margin:0; }
.uf-sequence-charts figcaption,.uf-scale-note { color:var(--bf-muted); font-size:.85rem; }
.uf-sequence-charts figcaption { text-align:center; }
.uf-sequence-formula { font-size:1.15rem; font-weight:600; }
.uf-sequence-error { padding:.6rem .8rem; background:#eaf4ef; border-radius:.35rem; }
.uf-sequence-error:empty,.uf-sequence-lab .uf-compare:empty { display:none; }
@media(max-width:800px) { .uf-selectors { grid-template-columns:1fr; } .uf-stats { grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media(max-width:700px) { .uf-phasors { max-width:320px; margin:auto; } }
@media(max-width:600px) { .uf-basis-grid,.uf-sequence-charts { grid-template-columns:1fr; } .uf-basis-grid svg { max-width:240px; margin:auto; } }