/* Simulatore di fisica - stessa grafica dei simulatori di elettronica e meccatronica (21/10/2026) */
.fs { --bg:#fbfcfe; --pn:#ffffff; --panel:#f6f8fb; --field:#ffffff; --bd:#d3dbe6; --tx:#1f2937; --mu:#64748b; --ac:#2563eb; --ac2:#e8f0fe; --ok:#15803d; --okbg:#dcfce7; --bad:#dc2626; --warn:#b45309; --cv:#fbfcfe; --wire:#9aa7b8; --hov:rgba(15,23,42,.05); --shadow:0 14px 40px rgba(15,23,42,.22); --menu:#ffffff;
  --gr:#15803d; --tl:#0d9488; --vi:#7c3aed; --an:#2563eb; --water:#4f9cf7; --dot:rgba(15,23,42,.17); --ink:#1f2933;
  --c1:#2563eb; --c2:#16a34a; --c3:#d97706; --c4:#9333ea; --c5:#dc2626; --c6:#0891b2; --c7:#be185d; --c8:#65a30d;
  font-family:inherit; color:var(--tx); position:relative; text-align:left; font-size:.92rem; container-type:inline-size; display:block; width:100%; }
.fs[data-tema="scuro"] { --bg:#0b0d11; --pn:#14181f; --panel:rgba(255,255,255,.035); --field:rgba(255,255,255,.08); --bd:rgba(255,255,255,.14); --tx:#e8edf4; --mu:#9fb0c4; --ac:#4f8dfd; --ac2:#172033; --ok:#4ade80; --okbg:#0f3a2c; --bad:#f87171; --warn:#fbbf24; --cv:#0b0e13; --wire:#5d6a7d; --hov:rgba(255,255,255,.07); --shadow:0 14px 40px rgba(0,0,0,.55); --menu:#0f1217;
  --gr:#4ade80; --tl:#2dd4bf; --vi:#a78bfa; --an:#6aa8ff; --water:#3b82f6; --dot:rgba(255,255,255,.16); --ink:#e8edf4;
  --c1:#60a5fa; --c2:#34d399; --c3:#fbbf24; --c4:#c084fc; --c5:#f87171; --c6:#22d3ee; --c7:#f472b6; --c8:#a3e635; }
.fs *, .fs *::before, .fs *::after { box-sizing:border-box; }
.fs svg { flex:none; } .fs button { font:inherit; color:inherit; } .fs [hidden] { display:none !important; }
.fsMu { color:var(--mu); font-size:.84rem; line-height:1.45; }
/* barra strumenti */
.fsTb { display:flex; flex-wrap:wrap; align-items:center; gap:4px; padding:0 0 6px; margin-bottom:6px; border:0; border-radius:0; background:none; }
.fsBtn { display:inline-flex; align-items:center; justify-content:center; height:36px; min-width:36px; padding:0 8px; border:1px solid transparent; border-radius:9px; background:transparent; color:var(--tx); cursor:pointer; transition:background .12s,border-color .12s; }
.fsBtn svg { width:19px; height:19px; fill:none; stroke:currentColor; stroke-width:1.9; stroke-linecap:round; stroke-linejoin:round; }
.fsBtn:hover:not(:disabled) { background:var(--hov); }
.fsBtn:disabled { opacity:.35; cursor:default; }
.fsBtn:focus-visible, .fsSpeed:focus-visible, .fsPalI:focus-visible, .fsPT:focus-visible { outline:2px solid var(--ac); outline-offset:2px; }
.fsBtn[aria-pressed="true"] { background:color-mix(in srgb, var(--ac) 20%, transparent); border-color:var(--ac); color:var(--ac); }
.fsBtn.fsPlay { width:44px; background:#16a34a; color:#fff; border-color:#15803d; }
.fsBtn.fsPlay:hover:not(:disabled) { background:#15803d; }
.fsBtn.fsPlay.on { background:#d97706; border-color:#b45309; } .fsBtn.fsPlay.on:hover { background:#b45309; }
.fsSpeed, .fs select, .fs input[type=text], .fs input[type=search], .fs input[type=number] { height:34px; padding:0 9px; font:inherit; font-size:.86rem; border:1px solid var(--bd); border-radius:8px; background:var(--field); color:inherit; outline:none; }
.fsSpeed { height:36px; width:auto; min-width:70px; }
.fs input:focus, .fs select:focus { border-color:var(--ac); box-shadow:0 0 0 3px color-mix(in srgb, var(--ac) 25%, transparent); }
.fs option { color:#111; background:#fff; }
.fsSep { width:1px; height:24px; background:var(--bd); margin:0 5px; }
.fsSp { flex:1; }
.fsStat { display:inline-flex; align-items:center; gap:7px; font-size:.82rem; color:var(--mu); padding:0 8px; }
.fsLed { width:9px; height:9px; border-radius:50%; background:var(--bd); display:inline-block; }
.fsStat.on .fsLed { background:var(--ok); box-shadow:0 0 8px var(--ok); } .fsStat.on { color:var(--ok); }
.fsSt { font-weight:700; font-variant-numeric:tabular-nums; }
.fsB { display:inline-flex; align-items:center; gap:6px; height:34px; padding:0 12px; font-size:.86rem; border:1px solid var(--bd); border-radius:9px; background:var(--field); color:var(--tx); cursor:pointer; }
.fsB:hover:not(:disabled) { border-color:var(--ac); }
.fsB.primary { background:var(--ac); border-color:var(--ac); color:#fff; font-weight:600; }
.fsB.del { color:var(--bad); } .fsB.del:hover { border-color:var(--bad); }
/* corpo */
.fsBody { display:grid; gap:10px; align-items:stretch; }
.fsPal, .fsProp { display:flex; flex-direction:column; min-height:0; border:1px solid var(--bd); border-radius:12px; background:var(--panel); overflow:hidden; }
.fsPalH { padding:10px 10px 0; }
.fsSearch { position:relative; display:block; } .fsSearch svg { position:absolute; left:10px; top:50%; width:16px; height:16px; transform:translateY(-50%); fill:none; stroke:var(--mu); stroke-width:2; stroke-linecap:round; pointer-events:none; }
.fs .fsSearch input { width:100%; height:36px; padding:0 10px 0 33px; border-radius:999px; }
.fsPalT { display:grid; grid-template-columns:repeat(5,1fr); gap:3px; padding:8px; border-bottom:1px solid var(--bd); }
.fsPT { min-width:0; height:30px; box-sizing:border-box; padding:0; border-radius:9px; border:1px solid transparent; background:transparent; color:var(--mu); display:grid; place-items:center; cursor:pointer; }
.fsPT .fsMini { width:18px; height:18px; color:inherit; } .fsPT .fsMini svg { width:18px; height:18px; }
.fsPT:hover { background:var(--hov); }
.fsPT.on { background:color-mix(in srgb, var(--ac) 14%, transparent); color:var(--ac); border-color:color-mix(in srgb, var(--ac) 45%, transparent); }
.fsPalL { flex:1; overflow:auto; padding:6px 8px 12px; }
.fsPalS { display:flex; align-items:baseline; justify-content:space-between; gap:6px; padding:6px 4px 8px; font-size:.92rem; font-weight:700; line-height:1.25; color:var(--tx); } .fsPalS small { color:var(--mu); font-weight:400; }
.fsPalI { min-width:0; display:flex; align-items:center; gap:8px; padding:4px 8px 4px 4px; margin-bottom:4px; border-radius:10px; border:1px solid transparent; background:transparent; cursor:grab; user-select:none; touch-action:none; font-size:.8rem; line-height:1.2; color:var(--tx); }
.fsPalI:hover { background:var(--hov); border-color:var(--bd); }
.fsMini { flex:none; width:52px; height:34px; display:flex; align-items:center; justify-content:center; color:var(--ink); } .fsMini svg { width:100%; height:100%; display:block; }
.fsPalI .fsMini { box-sizing:border-box; background:var(--field); border:1px solid var(--bd); border-radius:8px; padding:2px; }
.fsPalTip { font-size:.74rem; color:var(--mu); padding:8px 12px 10px; line-height:1.4; border-top:1px solid var(--bd); }
/* lavagna */
.fsBoard { position:relative; min-width:0; border:1px solid var(--bd); border-radius:12px; overflow:hidden; background:var(--cv); touch-action:none; }
.fsCv { display:block; width:100%; height:100%; user-select:none; -webkit-user-select:none; cursor:default; outline:none; touch-action:none; }
.fsCv.pan { cursor:grabbing; }
.fsExT { position:absolute; left:10px; top:10px; z-index:5; max-width:70%; padding:6px 12px; border-radius:999px; background:var(--menu); border:1px solid var(--bd); font-size:.82rem; box-shadow:0 4px 14px rgba(0,0,0,.18); pointer-events:none; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; } .fsExT:empty { display:none; }
.fsZl { position:absolute; right:10px; bottom:10px; z-index:5; padding:3px 10px; border-radius:999px; background:var(--menu); border:1px solid var(--bd); font-size:.76rem; color:var(--mu); pointer-events:none; font-variant-numeric:tabular-nums; }
/* pannello proprieta' */
.fsProp { padding:12px; overflow:auto; gap:12px; }
.fsPrj { display:grid; gap:8px; padding-bottom:12px; border-bottom:1px solid var(--bd); }
.fsPrj label { display:grid; gap:6px; color:var(--mu); font-size:.84rem; } .fsPrj input { width:100%; }
.fsPSt { font-size:.78rem; color:var(--mu); display:flex; align-items:center; gap:6px; } .fsPSt i { width:8px; height:8px; border-radius:50%; background:var(--mu); display:inline-block; } .fsPSt.ok i { background:var(--ok); } .fsPSt.wait i { background:var(--warn); } .fsPSt.err i { background:var(--bad); }
.fsInsp { display:grid; gap:10px; align-content:start; font-size:.86rem; }
/* blocchi */
/* scope */
/* finestre e menu */
.fsModal { position:absolute; inset:0; z-index:80; display:flex; align-items:flex-start; justify-content:center; padding:70px 14px 14px; background:rgba(5,8,14,.55); }
.fsMBox { width:min(480px,100%); max-height:80vh; overflow:auto; border:1px solid var(--bd); border-radius:14px; background:var(--menu); box-shadow:var(--shadow); }
.fsMH { display:flex; align-items:center; justify-content:space-between; padding:10px 10px 10px 16px; border-bottom:1px solid var(--bd); }
.fsMX { font:inherit; font-size:1.3rem; line-height:1; border:0; background:none; color:var(--mu); cursor:pointer; padding:0 6px; }
.fsMB { padding:14px 16px; font-size:.9rem; line-height:1.5; } .fsMB p { margin:0; }
.fsMF { display:flex; justify-content:flex-end; gap:8px; padding:10px 16px 14px; }
.fsList { list-style:none; margin:0; padding:0; display:grid; gap:6px; } .fsList li { display:flex; gap:6px; }
.fsOpenI { flex:1; display:flex; flex-direction:column; align-items:flex-start; gap:2px; padding:9px 12px; border:1px solid var(--bd); border-radius:9px; background:var(--field); cursor:pointer; text-align:left; } .fsOpenI:hover { border-color:var(--ac); } .fsOpenI small { color:var(--mu); }
.fsFlash { position:absolute; left:50%; bottom:54px; transform:translate(-50%,10px); background:var(--tx); color:var(--pn); padding:9px 16px; border-radius:10px; font-size:.84rem; opacity:0; pointer-events:none; transition:.2s; z-index:90; max-width:90%; }
.fsFlash.on { opacity:1; transform:translate(-50%,0); }
.fsPop { position:absolute; z-index:60; width:300px; max-height:75%; overflow:auto; background:var(--menu); border:1px solid var(--bd); border-radius:12px; box-shadow:var(--shadow); padding:6px; }
.fsPop button { display:flex; flex-direction:column; align-items:flex-start; gap:2px; width:100%; text-align:left; background:none; border:0; border-radius:8px; padding:8px 10px; color:var(--tx); cursor:pointer; }
.fsPop button:hover { background:var(--hov); }
.fsPop b { display:block; font-size:.86rem; } .fsPop small { color:var(--mu); font-size:.78rem; line-height:1.3; display:block; }
.fsPop button.cur b::after { content:" ✓"; color:var(--ac); }

.fsPop button i { width:7px; height:7px; border-radius:50%; flex:none; margin-top:6px; } .fsPop button span { display:block; min-width:0; }
.fsPop button { flex-direction:row; align-items:flex-start; gap:10px; }
.fsPopW { width:auto; max-width:1160px; display:grid; grid-template-columns:repeat(auto-fit,minmax(172px,1fr)); gap:4px 14px; padding:14px 16px 16px; border-radius:16px; background:#0a0b0e; border-color:rgba(255,255,255,.1); color:#eceff4; box-shadow:0 30px 90px rgba(0,0,0,.7); }
.fs:not([data-tema="scuro"]) .fsPopW { background:#fff; color:#1f2937; border-color:var(--bd); box-shadow:0 20px 60px rgba(15,23,42,.25); }
.fsPopW .fsPopG h4 { margin:2px 8px 8px; font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--mu); font-weight:700; }
.fsPopW button { color:inherit; } .fsPopW button b { color:inherit; } .fsPopW button:hover, .fsPopW button:focus-visible { background:rgba(255,255,255,.07); outline:none; }
.fs:not([data-tema="scuro"]) .fsPopW button:hover { background:rgba(15,23,42,.06); }

/* ---- layout fisica ---- */
.fsBody { grid-template-columns:208px minmax(0,1fr) 282px; grid-template-rows:clamp(560px,84vh,1000px); grid-template-areas:"pal board prop"; }
.fsPal { grid-area:pal; } .fsBoard { grid-area:board; display:flex; flex-direction:column; } .fsProp { grid-area:prop; }
.fsSc { position:relative; flex:1 1 auto; min-height:0; background:var(--cv); background-image:radial-gradient(var(--dot) 1.1px, transparent 1.2px); background-size:20px 20px; }
.fsCv { position:absolute; inset:0; width:100%; height:100%; }
.fsTx { font-family:inherit; font-variant-numeric:tabular-nums; user-select:none; pointer-events:none; }
.fsGr { flex:none; height:206px; display:grid; grid-template-columns:1fr 1fr; border-top:1px solid var(--bd); background:var(--pn); }
.fsGp { position:relative; min-width:0; min-height:0; } .fsGp + .fsGp { border-left:1px solid var(--bd); }
.fsGs { position:absolute; inset:0; width:100%; height:100%; display:block; }
.fsMini svg { fill:none; stroke:currentColor; stroke-width:1.7; stroke-linecap:round; stroke-linejoin:round; }
.fsPalI .fsMini { width:38px; height:38px; padding:5px; } .fsPalI { cursor:pointer; }
.fsPalI > span:last-child { min-width:0; } .fsPalI b { display:block; font-size:.86rem; font-weight:600; } .fsPalI small { display:block; color:var(--mu); font-size:.73rem; line-height:1.25; }
.fsPalI.cur { background:color-mix(in srgb, var(--ac) 12%, transparent); border-color:color-mix(in srgb, var(--ac) 45%, transparent); }
.fsVecB { gap:7px; } .fsVecB span { font-size:.84rem; }
.fsBtn.fsVecB[aria-pressed="true"] { background:color-mix(in srgb, var(--ac) 20%, transparent); }
/* pannello */
.fsProp { gap:0; padding:14px; }
.fsPH2 { display:grid; gap:2px; padding:12px 0 4px; } .fsPH2 b { font-size:1rem; } .fsPH2 small { color:var(--mu); font-size:.8rem; line-height:1.35; }
.fsH { margin:14px 0 8px; font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--mu); font-weight:700; }
.fsPar { display:grid; gap:4px; margin-bottom:9px; } .fsPar.lk { opacity:.6; }
.fsPR { display:flex; align-items:center; justify-content:space-between; gap:8px; } .fsPR label { color:var(--tx); font-size:.84rem; } .fsPR > span { display:inline-flex; align-items:baseline; gap:4px; }
.fsPR input[type=number] { width:74px; height:28px; padding:0 6px; text-align:right; font-weight:700; font-variant-numeric:tabular-nums; border-color:transparent; background:transparent; }
.fsPR input[type=number]:hover { border-color:var(--bd); } .fsPR small { color:var(--mu); font-size:.78rem; min-width:1.2em; }
.fsPar input[type=range] { width:100%; accent-color:var(--ac); height:18px; margin:0; padding:0; }
.fsPar select { width:100%; }
.fsLk { display:inline-flex; vertical-align:-3px; color:var(--warn); } .fsLk svg { width:14px; height:14px; fill:none; stroke:currentColor; stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
.fsRes { display:grid; grid-template-columns:1fr 1fr; gap:7px; }
.fsTile { display:grid; gap:2px; padding:8px 10px; border:1px solid var(--bd); border-radius:10px; background:var(--field); min-width:0; }
.fsTile small { color:var(--mu); font-size:.74rem; line-height:1.2; } .fsTile b { font-size:1rem; font-variant-numeric:tabular-nums; overflow-wrap:anywhere; } .fsTile b i { font-style:normal; font-weight:500; color:var(--mu); font-size:.78rem; }
.fsTile.lv { border-color:color-mix(in srgb, var(--ok) 40%, var(--bd)); }
.fsFm { margin-top:2px; padding:10px 12px; border:1px solid color-mix(in srgb, var(--ac) 40%, var(--bd)); border-radius:10px; background:color-mix(in srgb, var(--ac) 9%, transparent); font-family:Georgia,'Times New Roman',serif; font-style:italic; line-height:1.75; font-size:.9rem; overflow-wrap:anywhere; }
.fsFm b { font-style:normal; } .fsFm.sm { font-size:.84rem; margin-top:8px; }
.fsNote { margin-top:10px; padding:8px 10px; border-radius:10px; border:1px solid color-mix(in srgb, var(--warn) 55%, transparent); background:color-mix(in srgb, var(--warn) 10%, transparent); font-size:.8rem; line-height:1.4; }
.fsEx { margin:12px 0 0; padding:10px 12px; border:1px solid color-mix(in srgb, var(--warn) 55%, var(--bd)); border-radius:12px; background:color-mix(in srgb, var(--warn) 8%, transparent); }
.fsEx.ok { border-color:var(--ok); background:color-mix(in srgb, var(--ok) 11%, transparent); }
.fsExH { display:flex; align-items:center; justify-content:space-between; gap:8px; } .fsExH b { font-size:.92rem; }
.fsEx p { margin:6px 0 8px; font-size:.86rem; line-height:1.45; } .fsExV { font-size:.82rem; color:var(--mu); margin-bottom:6px; } .fsExV b { color:var(--tx); }
.fsExS { display:flex; align-items:center; gap:6px; font-size:.82rem; font-weight:600; color:var(--mu); } .fsEx.ok .fsExS { color:var(--ok); } .fsExS svg { width:18px; height:18px; fill:none; stroke:currentColor; stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round; }
.fsExB { display:flex; flex-wrap:wrap; gap:6px; margin-top:8px; } .fsExB .fsB { height:30px; font-size:.8rem; }
@container (max-width:1020px) { .fsBody { grid-template-columns:196px minmax(0,1fr); grid-template-rows:clamp(520px,76vh,900px) auto; grid-template-areas:"pal board" "prop prop"; } }
@container (max-width:700px) { .fsBody { grid-template-columns:1fr; grid-template-rows:auto clamp(560px,80vh,760px) auto; grid-template-areas:"pal" "board" "prop"; } .fsPalL { max-height:230px; } .fsGr { height:auto; grid-template-columns:1fr; } .fsGp { height:200px; } .fsGp + .fsGp { border-left:0; border-top:1px solid var(--bd); } }
@media (prefers-reduced-motion:reduce) { .fsFlash { transition:none; } }