/* ==========================================================================
   COMPONENTI: pannelli, check list, slider, pulsanti, oscilloscopio, schede
   ========================================================================== */

.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px}
:focus-visible{outline:2px solid var(--volt);outline-offset:2px}

/* ---------- Check list ---------- */
.checklist{padding:14px 14px 6px}
.checklist>p{margin:0 0 12px;color:var(--muted);font-size:.92rem}
.item{border-top:1px solid var(--grid);padding:10px 0}
.item:first-of-type{border-top:0}
.item-head{display:flex;align-items:center;gap:10px;cursor:pointer;font-weight:700}
.item-head input{width:20px;height:20px;margin:0;accent-color:var(--c,var(--ink));flex:none}
.swatch{width:14px;height:4px;border-radius:2px;background:var(--c,var(--ink));flex:none}
.item-body{display:none;padding:8px 0 2px 30px}
.item.on .item-body{display:block}
/* colore associato a ogni voce */
.item[data-c="v"]{--c:var(--volt)}
.item[data-c="i"]{--c:var(--curr)}
.item[data-c="p"]{--c:var(--phase)}
.item[data-c="w"]{--c:var(--power)}

/* ---------- Riga con slider + casella numerica ---------- */
.row{display:grid;grid-template-columns:1fr auto;gap:2px 10px;align-items:center;margin:6px 0 10px}
.row label{font-size:.92rem}
.row input[type=range]{grid-column:1/-1;width:100%;accent-color:var(--c,var(--ink));margin:0}
.num{display:flex;align-items:center;gap:4px;font-size:.92rem;color:var(--muted)}
.num input,.num select{padding:3px 6px;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);font:inherit}
.num input{width:5.8em;font-variant-numeric:tabular-nums;text-align:right}
.row.locked input{opacity:.6}

.note{font-size:.88rem;color:var(--muted);margin:4px 0 8px}
.sub{display:flex;align-items:center;gap:8px;margin:6px 0;font-size:.95rem;cursor:pointer}
.sub input{accent-color:var(--ink);width:17px;height:17px;margin:0}

/* ---------- Scelta a pillole (tipo di carico, cosa ascoltare) ---------- */
.seg{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 10px}
.seg label{padding:5px 11px;font-size:.88rem;cursor:pointer;border:1px solid var(--line);border-radius:999px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label:has(input:checked){background:var(--ink);color:var(--panel);border-color:var(--ink);font-weight:700}
.seg label:has(input:focus-visible){outline:2px solid var(--volt);outline-offset:2px}

.res{background:var(--soft);border-radius:8px;padding:8px 10px;font-size:.92rem;margin:4px 0 8px}
.res .btn{margin-top:6px}
.live-phase{font-variant-numeric:tabular-nums;font-size:.95rem}

/* ---------- Pulsanti e barra comandi ---------- */
.btn{font:inherit;font-weight:700;padding:7px 14px;border-radius:8px;border:1px solid var(--line);
  background:var(--paper);color:var(--ink);cursor:pointer}
.btn.primary{background:var(--ink);color:var(--panel);border-color:var(--ink);min-width:6.5em}
.btn.small{padding:5px 10px;font-size:.88rem}
.toolbar{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;margin-bottom:8px}
.tl{display:flex;align-items:center;gap:8px;font-size:.92rem;color:var(--muted)}
.tl input[type=range]{width:130px;accent-color:var(--ink)}
.tl.check{cursor:pointer;color:var(--ink)}
.tl.check input{width:17px;height:17px;margin:0;accent-color:var(--ink)}
.tl output{min-width:4.2em;color:var(--ink);font-variant-numeric:tabular-nums}
.tl select{font:inherit;padding:4px 6px;border-radius:6px;border:1px solid var(--line);background:var(--paper);color:var(--ink)}

/* ---------- Oscilloscopio ---------- */
.scope{padding:12px}
.legend{display:flex;flex-wrap:wrap;gap:4px 18px;font-size:.9rem;margin:4px 2px 6px;color:var(--muted)}
.legend span::before{content:"";display:inline-block;width:16px;height:3px;border-radius:2px;background:var(--lc);vertical-align:middle;margin-right:6px}
.canvas-box{width:100%;position:relative}
#scope{display:block;width:100%}
.live{font-variant-numeric:tabular-nums;font-size:.95rem;margin:6px 2px 0;display:flex;flex-wrap:wrap;gap:4px 22px}

/* ---------- Scheda del carico ---------- */
.card{padding:16px}
.circ{width:100%;max-width:440px;display:block;color:var(--ink)}
.circ text{font-family:inherit;font-size:12px;fill:currentColor}
.comp{transition:opacity .4s ease}
@media (prefers-reduced-motion:reduce){.comp{transition:none}}
.zstate{font-weight:700;margin:6px 0 10px}
#zplane{display:block;width:100%;height:200px}
.zvals{font-size:.92rem;color:var(--muted);margin-top:6px;font-variant-numeric:tabular-nums}

/* ---------- Scheda formule ---------- */
.eq{font-size:1.05rem;margin:2px 0;font-variant-numeric:tabular-nums;overflow-x:auto;white-space:nowrap}
.eq.v{color:var(--volt)}
.eq.i{color:var(--curr)}
dl{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px 16px;margin:14px 0}
dl div{border-left:3px solid var(--grid);padding-left:8px}
dt{font-size:.85rem;color:var(--muted)}
dd{margin:0;font-variant-numeric:tabular-nums;font-weight:700}
.explain{background:var(--soft);border-radius:8px;padding:12px 14px;margin:0;max-width:72ch}