/* ============================================================
   TOOLS — sezione strumenti tecnici (calcolatori)
   Tutto namespacato per non collidere con lo stile dell'app.
   - Indice:  classi .tools-*
   - Ruota di Ohm: tutto scopato sotto #tools-legge-di-ohm-view,
     variabili CSS con prefisso --ohm-*
   ============================================================ */

/* ---------- INDICE TOOLS (griglia di card) ---------- */
#tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 10px;
}
.tools-card {
  --tools-card-accent: #667eea;
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--tools-card-accent) 16%, white), #fff 78%);
  border: 1px solid color-mix(in srgb, var(--tools-card-accent) 32%, #e5e7eb);
  border-radius: 14px;
  padding: 18px;
  cursor: pointer;
  text-align: left;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.tools-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px -6px color-mix(in srgb, var(--tools-card-accent) 45%, transparent);
  border-color: color-mix(in srgb, var(--tools-card-accent) 55%, #e5e7eb);
}
.tools-card-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: linear-gradient(135deg, var(--tools-card-accent) 0%, color-mix(in srgb, var(--tools-card-accent) 65%, black) 100%);
  color: #fff;
  box-shadow: 0 6px 14px -6px color-mix(in srgb, var(--tools-card-accent) 60%, transparent);
}
.tools-card-body { min-width: 0; }
.tools-card-title {
  font-size: 16px;
  font-weight: 700;
  color: #1b2027;
  margin: 0 0 2px 0;
}
.tools-card-title:last-child { margin: 0; }
.tools-card-desc {
  font-size: 12.5px;
  color: #6b7280;
  line-height: 1.4;
  margin: 0;
}
.tools-empty {
  color: #6b7280;
  font-size: 13px;
  padding: 20px 0;
}

/* ---------- VISTA CATEGORIA (griglia dei tool della categoria) ---------- */
.tools-cat-head { display: flex; align-items: center; gap: 12px; margin: 2px 0 6px 0; }
.tools-cat-head-icon {
  --tools-card-accent: #667eea;
  width: 40px; height: 40px;
  flex-shrink: 0;
  border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  color: #fff;
  background: linear-gradient(135deg, var(--tools-card-accent) 0%, color-mix(in srgb, var(--tools-card-accent) 65%, black) 100%);
  box-shadow: 0 6px 14px -6px color-mix(in srgb, var(--tools-card-accent) 60%, transparent);
}
.tools-cat-head h2 { margin: 0; font-size: 18px; font-weight: 700; color: #1b2027; }
.tools-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 14px;
}

/* Pulsante "torna all'indice" dentro un tool */
.tools-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 9px 17px;
  border-radius: 20px;
  cursor: pointer;
  font-family: inherit;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px -4px rgba(102,126,234,0.55);
  transition: filter .2s ease, transform .2s ease;
}
.tools-back-btn:hover { filter: brightness(1.06); transform: translateY(-1px); }
.tools-back-btn:active { transform: translateY(0); }

/* ============================================================
   RUOTA DI OHM — dal file ohm-law-wheel (stile invariato),
   solo namespacato: classi .ohm-*, variabili --ohm-*,
   tutto racchiuso in #tools-legge-di-ohm-view
   ============================================================ */
#tools-legge-di-ohm-view {
  --ohm-wheel-bg: #ef7a63;
  --ohm-c-V: #2f8f4e;
  --ohm-c-I: #b6272c;
  --ohm-c-R: #223d73;
  --ohm-c-P: #e2792c;
  --ohm-win: #22c55e;
  --ohm-text: #1b2027;
  --ohm-muted: #6b7280;
  --ohm-mono: "SF Mono", "Cascadia Code", Consolas, Menlo, monospace;
}

.ohm-panel { width: 100%; max-width: 460px; margin: 0 auto; color: var(--ohm-text); }

.ohm-header {
  margin-bottom: 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
.ohm-header h1 { font-size: 21px; margin: 0 0 4px 0; font-weight: 700; color: var(--ohm-text); }
.ohm-header p { font-size: 12.5px; margin: 0; color: var(--ohm-muted); line-height: 1.4; max-width: 280px; }
.ohm-reset-btn {
  flex-shrink: 0;
  display: flex; align-items: center; gap: 6px;
  background: #f4f5f7;
  border: 1px solid #e2e4e9;
  color: var(--ohm-muted);
  font-size: 12.5px;
  font-weight: 600;
  padding: 9px 15px;
  border-radius: 20px;
  cursor: pointer;
  font-family: inherit;
}
.ohm-reset-btn:hover { background: #eceef1; color: var(--ohm-text); }
.ohm-reset-btn svg { width: 13px; height: 13px; }

.ohm-wheel-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  filter: drop-shadow(0 12px 30px rgba(0,0,0,0.25));
}
.ohm-wheel-wrap svg { width: 100%; height: 100%; display: block; }

#ohm-ring-group {
  transform-origin: 200px 200px;
  transition: transform 2.8s cubic-bezier(0.1, 0.65, 0.15, 1);
}

.ohm-wedge {
  stroke: #fff;
  stroke-width: 3;
  stroke-linejoin: round;
  transition: fill-opacity .3s ease, fill .3s ease, filter .3s ease;
}
.ohm-wedge.dim { fill-opacity: 0.25; }
.ohm-wedge.active {
  fill: var(--ohm-win) !important;
  fill-opacity: 1;
  filter: drop-shadow(0 0 8px rgba(34,197,94,0.9));
}

.ohm-wedge-label {
  fill: #fff;
  font-size: 13px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  transition: opacity .25s ease;
}
.ohm-wedge-label.dim { opacity: 0.45; }

.ohm-quad {
  stroke: #fff;
  stroke-width: 4;
  stroke-linejoin: round;
  transition: fill .2s ease;
}
.ohm-quad.computed { fill: var(--ohm-win); }

.ohm-quad-overlay {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 96px;
  pointer-events: none;
}
.ohm-quad-overlay .q-label {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .3px;
  margin-bottom: 2px;
  color: #fff;
  transition: color .2s ease;
}
.ohm-quad-overlay .q-input {
  width: 100%;
  text-align: center;
  background: transparent;
  border: none;
  border-bottom: 2px solid rgba(255,255,255,0.55);
  color: #fff;
  font-family: var(--ohm-mono);
  font-size: 15px;
  font-weight: 700;
  padding: 2px 0;
  letter-spacing: -0.2px;
  pointer-events: auto;
  transition: color .2s ease, border-color .2s ease;
}
.ohm-quad-overlay .q-input:focus { outline: none; border-color: #fff; }
.ohm-quad-overlay .q-input::placeholder { color: rgba(255,255,255,0.55); font-weight: 500; }
.ohm-quad-overlay .q-input::-webkit-outer-spin-button,
.ohm-quad-overlay .q-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.ohm-quad-overlay .q-input { -moz-appearance: textfield; }
.ohm-quad-overlay .q-unit {
  font-size: 9.5px;
  opacity: 0.75;
  margin-top: 2px;
  letter-spacing: .3px;
  color: #fff;
}
.ohm-quad-overlay.computed .q-label,
.ohm-quad-overlay.computed .q-input,
.ohm-quad-overlay.computed .q-unit { color: #ffffff; }
.ohm-quad-overlay.computed .q-input { border-color: rgba(255,255,255,0.6); }

.ohm-status {
  text-align: center;
  font-size: 12px;
  opacity: 0.8;
  margin-top: 16px;
  min-height: 16px;
  color: var(--ohm-text);
}

/* ============================================================
   TOOL: CONVERSIONE HP ↔ kW — dal file hp-kw-tool (stile invariato),
   namespacato: classi .hpkw-*, variabili --hpkw-*, dentro
   #tools-hp-kw-view
   ============================================================ */
#tools-hp-kw-view {
  --hpkw-accent: #ef7a63;
  --hpkw-accent-2: #f2a154;
  --hpkw-accent-dark: #d9634c;
  --hpkw-kw-accent: #3b82f6;
  --hpkw-text: #1b2027;
  --hpkw-muted: #6b7280;
  --hpkw-border: #e7e8ec;
  --hpkw-card-bg: #fbfbfc;
  --hpkw-mono: "SF Mono", "Cascadia Code", Consolas, Menlo, monospace;
}

.hpkw-panel { width: 100%; max-width: 460px; margin: 0 auto; color: var(--hpkw-text); }

.hpkw-header { text-align: center; margin-bottom: 34px; }
.hpkw-icon-badge {
  width: 46px; height: 46px;
  margin: 0 auto 14px auto;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--hpkw-accent), var(--hpkw-accent-2));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -6px rgba(239,122,99,0.55);
}
.hpkw-icon-badge svg { width: 24px; height: 24px; color: #fff; }
.hpkw-header h1 { font-size: 21px; margin: 0 0 6px 0; font-weight: 700; letter-spacing: -.2px; color: var(--hpkw-text); }
.hpkw-header p { font-size: 13px; color: var(--hpkw-muted); margin: 0; }

.hpkw-converter { display: flex; align-items: center; gap: 10px; }

.hpkw-unit-card {
  flex: 1;
  min-width: 0;
  position: relative;
  background: var(--hpkw-card-bg);
  border: 1.5px solid var(--hpkw-border);
  border-radius: 18px;
  padding: 20px 14px 16px 14px;
  text-align: center;
  box-shadow: 0 12px 28px -16px rgba(20,20,30,0.18);
  transition: border-color .25s ease, background .25s ease, box-shadow .25s ease, transform .25s ease;
}
.hpkw-unit-card.from {
  border-color: color-mix(in srgb, var(--hpkw-accent) 55%, var(--hpkw-border));
  background: linear-gradient(160deg, color-mix(in srgb, var(--hpkw-accent) 9%, white), white);
  box-shadow: 0 14px 30px -14px rgba(239,122,99,0.45);
}
.hpkw-unit-card.to {
  border-color: color-mix(in srgb, var(--hpkw-kw-accent) 30%, var(--hpkw-border));
}

.hpkw-unit-glyph {
  width: 30px; height: 30px;
  margin: 0 auto 8px auto;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--hpkw-accent) 14%, white);
  color: var(--hpkw-accent-dark);
  transition: background .25s ease, color .25s ease;
}
.hpkw-unit-glyph svg { width: 16px; height: 16px; }
.hpkw-unit-card.to .hpkw-unit-glyph { background: color-mix(in srgb, var(--hpkw-kw-accent) 12%, white); color: var(--hpkw-kw-accent); }

.hpkw-unit-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .3px;
  color: var(--hpkw-muted);
  margin-bottom: 10px;
}
.hpkw-unit-card.from .hpkw-unit-label { color: var(--hpkw-accent-dark); }
.hpkw-unit-card.to .hpkw-unit-label { color: var(--hpkw-kw-accent); }

.hpkw-unit-input {
  width: 100%;
  border: none;
  background: transparent;
  text-align: center;
  font-family: var(--hpkw-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--hpkw-text);
  padding: 0;
}
.hpkw-unit-input:focus { outline: none; }
.hpkw-unit-input::placeholder { color: #c7c9cf; }
.hpkw-unit-card.to .hpkw-unit-input { color: var(--hpkw-muted); }
.hpkw-unit-input::-webkit-outer-spin-button,
.hpkw-unit-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.hpkw-unit-input { -moz-appearance: textfield; }

.hpkw-unit-sub { font-size: 11px; color: var(--hpkw-muted); margin-top: 6px; }

.hpkw-swap-btn {
  flex-shrink: 0;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(140deg, var(--hpkw-accent), var(--hpkw-accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 18px -6px rgba(239,122,99,0.6);
  transition: transform .35s cubic-bezier(0.34,1.56,0.64,1), box-shadow .2s ease;
}
.hpkw-swap-btn:hover { transform: scale(1.07); box-shadow: 0 10px 22px -6px rgba(239,122,99,0.7); }
.hpkw-swap-btn:active { transform: scale(0.94); }
.hpkw-swap-btn svg { width: 19px; height: 19px; color: #fff; transition: transform .4s cubic-bezier(0.34,1.56,0.64,1); }
.hpkw-swap-btn.spun svg { transform: rotate(180deg); }

@keyframes hpkwCardPulse {
  0% { transform: scale(1); }
  35% { transform: scale(1.035); }
  100% { transform: scale(1); }
}
.hpkw-unit-card.pulse { animation: hpkwCardPulse .3s ease; }

.hpkw-factor-wrap { display: flex; justify-content: center; }
.hpkw-factor-note {
  text-align: center;
  font-size: 11.5px;
  color: var(--hpkw-muted);
  margin-top: 24px;
  background: color-mix(in srgb, var(--hpkw-accent) 7%, white);
  border: 1px solid color-mix(in srgb, var(--hpkw-accent) 18%, white);
  border-radius: 20px;
  padding: 8px 14px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
}
.hpkw-factor-note strong { color: var(--hpkw-text); font-family: var(--hpkw-mono); font-weight: 600; }

/* ============================================================
   TOOL: DIMENSIONAMENTO CAVI ELETTRICI — dal file omonimo,
   namespacato: classi .cavi-*, variabili --cavi-*, dentro
   #tools-dimensionamento-cavi-view
   ============================================================ */
#tools-dimensionamento-cavi-view {
  --cavi-accent: #ef7a63;
  --cavi-accent-2: #f2a154;
  --cavi-accent-dark: #d9634c;
  --cavi-text: #1b2027;
  --cavi-muted: #6b7280;
  --cavi-border: #e7e8ec;
  --cavi-card-bg: #fbfbfc;
  --cavi-win: #16a34a;
  --cavi-warn: #d97706;
  --cavi-mono: "SF Mono", "Cascadia Code", Consolas, Menlo, monospace;
}

.cavi-panel { width: 100%; max-width: 480px; margin: 0 auto; color: var(--cavi-text); }

.cavi-header { text-align: center; margin-bottom: 28px; }
.cavi-icon-badge {
  width: 46px; height: 46px;
  margin: 0 auto 14px auto;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--cavi-accent), var(--cavi-accent-2));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -6px rgba(239,122,99,0.55);
}
.cavi-icon-badge svg { width: 24px; height: 24px; color: #fff; }
.cavi-header h1 { font-size: 20px; margin: 0 0 6px 0; font-weight: 700; letter-spacing: -.2px; color: var(--cavi-text); }
.cavi-header p { font-size: 12.5px; color: var(--cavi-muted); margin: 0; line-height: 1.4; }

.cavi-card {
  background: var(--cavi-card-bg);
  border: 1px solid var(--cavi-border);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: 0 10px 24px -16px rgba(20,20,30,0.15);
}

.cavi-toggle-group { display: flex; gap: 6px; margin-bottom: 14px; }
.cavi-toggle-group button {
  flex: 1;
  min-width: 0;
  border: 1.5px solid var(--cavi-border);
  background: #fff;
  color: var(--cavi-text);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 6px;
  border-radius: 9px;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.cavi-toggle-group button.active {
  background: linear-gradient(140deg, var(--cavi-accent), var(--cavi-accent-2));
  border-color: transparent;
  color: #fff;
}

.cavi-form-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}
.cavi-field { margin-bottom: 4px; min-width: 0; }
.cavi-field label {
  display: block;
  font-size: 11.5px;
  color: var(--cavi-muted);
  margin-bottom: 5px;
  font-weight: 600;
}
.cavi-field input, .cavi-field select {
  width: 100%;
  padding: 9px 10px;
  border: 1.5px solid var(--cavi-border);
  border-radius: 9px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--cavi-text);
}
.cavi-field input:focus, .cavi-field select:focus {
  outline: none;
  border-color: var(--cavi-accent);
}
.cavi-field input::-webkit-outer-spin-button,
.cavi-field input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.cavi-field input { -moz-appearance: textfield; }

.cavi-hidden { display: none !important; }

.cavi-result-card {
  background: linear-gradient(160deg, color-mix(in srgb, var(--cavi-accent) 10%, white), white);
  border: 1.5px solid color-mix(in srgb, var(--cavi-accent) 40%, var(--cavi-border));
  border-radius: 18px;
  padding: 20px;
  margin-bottom: 14px;
  box-shadow: 0 14px 30px -16px rgba(239,122,99,0.4);
}
.cavi-result-label { font-size: 12px; color: var(--cavi-muted); font-weight: 600; margin-bottom: 4px; }
.cavi-result-value {
  font-family: var(--cavi-mono);
  font-size: 34px;
  font-weight: 700;
  color: var(--cavi-accent-dark);
  line-height: 1.1;
}
.cavi-result-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-top: 8px;
  background: color-mix(in srgb, var(--cavi-warn) 15%, white);
  color: var(--cavi-warn);
}
.cavi-result-badge.ok { background: color-mix(in srgb, var(--cavi-win) 15%, white); color: var(--cavi-win); }

.cavi-breakdown { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.cavi-breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  font-size: 12.5px;
  padding: 8px 10px;
  background: rgba(0,0,0,0.02);
  border-radius: 8px;
}
.cavi-breakdown-row .k { color: var(--cavi-muted); }
.cavi-breakdown-row .v { font-family: var(--cavi-mono); font-weight: 700; color: var(--cavi-text); text-align: right; }

.cavi-note {
  font-size: 11px;
  color: var(--cavi-muted);
  line-height: 1.5;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--cavi-border);
}

.cavi-source-note {
  text-align: center;
  font-size: 10.5px;
  color: var(--cavi-muted);
  margin-top: 6px;
  line-height: 1.5;
}

/* ============================================================
   TOOL: COLORI RESISTENZE — dal file omonimo, namespacato:
   classi .res-*, variabili --res-*, dentro
   #tools-colori-resistenze-view
   ============================================================ */
#tools-colori-resistenze-view {
  --res-accent: #ef7a63;
  --res-accent-2: #f2a154;
  --res-accent-dark: #d9634c;
  --res-text: #1b2027;
  --res-muted: #6b7280;
  --res-border: #e7e8ec;
  --res-card-bg: #fbfbfc;
  --res-body-tan: #d9bd8f;
  --res-body-tan-2: #c9a870;
  --res-mono: "SF Mono", "Cascadia Code", Consolas, Menlo, monospace;
}

.res-panel { width: 100%; max-width: 460px; margin: 0 auto; color: var(--res-text); }

.res-header { text-align: center; margin-bottom: 22px; }
.res-icon-badge {
  width: 46px; height: 46px;
  margin: 0 auto 14px auto;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--res-accent), var(--res-accent-2));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -6px rgba(239,122,99,0.55);
}
.res-icon-badge svg { width: 24px; height: 24px; color: #fff; }
.res-header h1 { font-size: 20px; margin: 0 0 6px 0; font-weight: 700; letter-spacing: -.2px; color: var(--res-text); }
.res-header p { font-size: 12.5px; color: var(--res-muted); margin: 0; }

.res-toggle-group { display: flex; gap: 6px; margin-bottom: 18px; }
.res-toggle-group button {
  flex: 1;
  min-width: 0;
  border: 1.5px solid var(--res-border);
  background: #fff;
  color: var(--res-text);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 6px;
  border-radius: 9px;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.res-toggle-group button.active {
  background: linear-gradient(140deg, var(--res-accent), var(--res-accent-2));
  border-color: transparent;
  color: #fff;
}

.res-resistor-card {
  background: var(--res-card-bg);
  border: 1px solid var(--res-border);
  border-radius: 18px;
  padding: 26px 16px 20px 16px;
  margin-bottom: 16px;
  box-shadow: 0 10px 24px -16px rgba(20,20,30,0.15);
}
.res-resistor-wrap { display: flex; align-items: center; justify-content: center; }
.res-resistor-lead { width: 15%; max-width: 60px; height: 3px; background: #9a9a9a; flex-shrink: 0; }
.res-resistor-body {
  position: relative;
  flex: 1;
  max-width: 260px;
  height: 46px;
  background: linear-gradient(180deg, #e6cf9f, var(--res-body-tan) 45%, var(--res-body-tan-2));
  border-radius: 12px;
  display: flex;
  align-items: stretch;
  padding: 0 10px;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.18), 0 6px 14px -8px rgba(0,0,0,0.3);
  overflow: hidden;
}
.res-band {
  width: 12%;
  margin: 0 1px;
  border-radius: 1px;
  box-shadow: inset 0 0 3px rgba(0,0,0,0.3);
  transition: background .15s ease;
}
.res-band.tol { margin-left: auto; }

.res-result-value {
  text-align: center;
  font-family: var(--res-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--res-accent-dark);
  margin-top: 20px;
}

.res-band-rows { display: flex; flex-direction: column; gap: 8px; }
.res-band-row {
  --res-row-text: var(--res-text);
  --res-row-border: var(--res-border);
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--res-card-bg);
  border: 1.5px solid var(--res-row-border);
  border-radius: 12px;
  padding: 10px 14px;
  color: var(--res-row-text);
  transition: background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.res-band-row-label {
  font-size: 11.5px;
  font-weight: 700;
  color: color-mix(in srgb, var(--res-row-text) 62%, transparent);
  width: 78px;
  flex-shrink: 0;
  pointer-events: none;
}
.res-band-row-text { flex: 1; min-width: 0; pointer-events: none; }
.res-band-color-name { font-size: 13.5px; font-weight: 600; color: var(--res-row-text); }
.res-band-color-value { font-size: 11px; color: color-mix(in srgb, var(--res-row-text) 65%, transparent); }
.res-chevron { color: color-mix(in srgb, var(--res-row-text) 55%, transparent); pointer-events: none; flex-shrink: 0; }
.res-chevron svg { width: 16px; height: 16px; }
.res-band-select {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  border: none;
}
.res-band-row:hover { box-shadow: 0 4px 14px -6px rgba(0,0,0,0.25); }

/* ============================================================
   TOOL: CALCOLO CONDENSATORI — dal file omonimo, namespacato:
   classi .cond-*, variabili --cond-*, dentro
   #tools-condensatori-view
   ============================================================ */
#tools-condensatori-view {
  --cond-accent: #ef7a63;
  --cond-accent-2: #f2a154;
  --cond-accent-dark: #d9634c;
  --cond-text: #1b2027;
  --cond-muted: #6b7280;
  --cond-border: #e7e8ec;
  --cond-card-bg: #fbfbfc;
  --cond-mono: "SF Mono", "Cascadia Code", Consolas, Menlo, monospace;
}

.cond-panel { width: 100%; max-width: 460px; margin: 0 auto; color: var(--cond-text); }

.cond-header { text-align: center; margin-bottom: 24px; }
.cond-icon-badge {
  width: 46px; height: 46px;
  margin: 0 auto 14px auto;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--cond-accent), var(--cond-accent-2));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -6px rgba(239,122,99,0.55);
}
.cond-icon-badge svg { width: 24px; height: 24px; color: #fff; }
.cond-header h1 { font-size: 21px; margin: 0 0 6px 0; font-weight: 700; letter-spacing: -.2px; color: var(--cond-text); }
.cond-header p { font-size: 13px; color: var(--cond-muted); margin: 0; }

.cond-toggle-group { display: flex; gap: 6px; margin-bottom: 18px; }
.cond-toggle-group button {
  flex: 1;
  min-width: 0;
  border: 1.5px solid var(--cond-border);
  background: #fff;
  color: var(--cond-text);
  font-size: 12.5px;
  font-weight: 600;
  padding: 10px 6px;
  border-radius: 9px;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.cond-toggle-group button.active {
  background: linear-gradient(140deg, var(--cond-accent), var(--cond-accent-2));
  border-color: transparent;
  color: #fff;
}

.cond-scenario-panel { display: none; }
.cond-scenario-panel.active { display: block; }

.cond-subtabs { display: flex; gap: 6px; margin-bottom: 14px; }
.cond-subtabs button {
  flex: 1;
  min-width: 0;
  border: 1.5px solid var(--cond-border);
  background: #fff;
  font-size: 12.5px;
  font-weight: 700;
  padding: 9px 6px;
  border-radius: 9px;
  cursor: pointer;
  font-family: inherit;
  color: var(--cond-muted);
}
.cond-subtabs button.active {
  border-color: var(--cond-accent);
  color: var(--cond-accent-dark);
  background: color-mix(in srgb, var(--cond-accent) 8%, white);
}

.cond-card {
  background: var(--cond-card-bg);
  border: 1px solid var(--cond-border);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: 0 10px 24px -18px rgba(20,20,30,0.18);
}
.cond-field { margin-bottom: 12px; }
.cond-field:last-child { margin-bottom: 0; }
.cond-field label { display: block; font-size: 12px; font-weight: 600; color: var(--cond-muted); margin-bottom: 5px; }
.cond-field-row { display: flex; gap: 10px; }
.cond-field-row .cond-field { flex: 1; min-width: 0; }
.cond-field input[type="number"] {
  width: 100%;
  border: 1.5px solid var(--cond-border);
  background: #fff;
  border-radius: 9px;
  padding: 10px 11px;
  font-size: 15px;
  font-family: var(--cond-mono);
  color: var(--cond-text);
  font-weight: 600;
}
.cond-field input:focus { outline: none; border-color: var(--cond-accent); }
.cond-field input::-webkit-outer-spin-button,
.cond-field input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.cond-field input[type="number"] { -moz-appearance: textfield; }

.cond-result {
  text-align: center;
  background: linear-gradient(160deg, color-mix(in srgb, var(--cond-accent) 10%, white), white);
  border: 1.5px solid color-mix(in srgb, var(--cond-accent) 35%, var(--cond-border));
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
}
.cond-cv-label { font-size: 11.5px; color: var(--cond-muted); font-weight: 700; text-transform: uppercase; letter-spacing: .4px; }
.cond-cv-value { font-size: 32px; font-weight: 800; color: var(--cond-accent-dark); font-family: var(--cond-mono); margin: 6px 0; }
.cond-cv-sub { font-size: 11.5px; color: var(--cond-muted); line-height: 1.4; }

.cond-note {
  font-size: 11.5px;
  color: var(--cond-muted);
  line-height: 1.55;
  background: color-mix(in srgb, var(--cond-accent) 6%, white);
  border: 1px solid color-mix(in srgb, var(--cond-accent) 16%, white);
  border-radius: 12px;
  padding: 11px 13px;
  margin-top: 4px;
}

.cond-formula-note {
  text-align: center;
  font-size: 11.5px;
  color: var(--cond-muted);
  margin: -6px 0 14px 0;
  font-family: var(--cond-mono);
}

/* ============================================================
   TOOL: POLLICI ↔ MILLIMETRI — dal file omonimo, namespacato:
   classi .pmm-*, variabili --pmm-*, dentro
   #tools-pollici-mm-view
   ============================================================ */
#tools-pollici-mm-view {
  --pmm-accent: #06b6d4;
  --pmm-accent-2: #22d3ee;
  --pmm-accent-dark: #0e7490;
  --pmm-text: #1b2027;
  --pmm-muted: #6b7280;
  --pmm-border: #e7e8ec;
  --pmm-card-bg: #fbfbfc;
  --pmm-mono: "SF Mono", "Cascadia Code", Consolas, Menlo, monospace;
}

.pmm-panel { width: 100%; max-width: 460px; margin: 0 auto; color: var(--pmm-text); }

.pmm-header { text-align: center; margin-bottom: 24px; }
.pmm-icon-badge {
  width: 46px; height: 46px;
  margin: 0 auto 14px auto;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--pmm-accent), var(--pmm-accent-2));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -6px rgba(6,182,212,0.5);
}
.pmm-icon-badge svg { width: 24px; height: 24px; color: #fff; }
.pmm-header h1 { font-size: 21px; margin: 0 0 6px 0; font-weight: 700; letter-spacing: -.2px; color: var(--pmm-text); }
.pmm-header p { font-size: 13px; color: var(--pmm-muted); margin: 0; }

.pmm-card {
  background: var(--pmm-card-bg);
  border: 1px solid var(--pmm-border);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: 0 10px 24px -18px rgba(20,20,30,0.18);
}

.pmm-field { margin-bottom: 0; min-width: 0; }
.pmm-field label { display: block; font-size: 12px; font-weight: 600; color: var(--pmm-muted); margin-bottom: 5px; }
.pmm-field input {
  width: 100%;
  border: 1.5px solid var(--pmm-border);
  background: #fff;
  border-radius: 9px;
  padding: 10px 11px;
  font-size: 17px;
  font-family: var(--pmm-mono);
  color: var(--pmm-text);
  font-weight: 600;
}
.pmm-field input:focus { outline: none; border-color: var(--pmm-accent); }
.pmm-field input::-webkit-outer-spin-button,
.pmm-field input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.pmm-field input[type="number"] { -moz-appearance: textfield; }

.pmm-swap-row { display: flex; align-items: center; gap: 10px; }
.pmm-swap-row .pmm-field { flex: 1; }

.pmm-in-wrap { position: relative; }
.pmm-in-wrap input { padding-right: 34px; }

.pmm-dropdown-btn {
  position: absolute;
  right: 4px; top: 50%;
  transform: translateY(-50%);
  width: 28px; height: 28px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--pmm-muted);
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
  transition: background .15s ease;
}
.pmm-dropdown-btn:hover { background: color-mix(in srgb, var(--pmm-accent) 8%, white); color: var(--pmm-accent-dark); }
.pmm-dropdown-btn svg { width: 13px; height: 13px; transition: transform .2s ease; }
.pmm-dropdown-btn.open svg { transform: rotate(180deg); }

.pmm-dropdown-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  background: #fff;
  border: 1.5px solid var(--pmm-border);
  border-radius: 12px;
  box-shadow: 0 16px 32px -14px rgba(20,20,30,0.28);
  max-height: 236px;
  overflow-y: auto;
  z-index: 30;
  display: none;
  padding: 5px;
}
.pmm-dropdown-list.open { display: block; }
.pmm-dropdown-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.pmm-dropdown-item:hover { background: color-mix(in srgb, var(--pmm-accent) 9%, white); }
.pmm-dropdown-item .frac { font-family: var(--pmm-mono); font-weight: 700; font-size: 13px; color: var(--pmm-text); }
.pmm-dropdown-item .mm { font-family: var(--pmm-mono); font-weight: 600; font-size: 11.5px; color: var(--pmm-accent-dark); }

.pmm-swap-btn {
  flex-shrink: 0;
  width: 38px; height: 38px;
  margin-top: 18px;
  order: 2;
  border-radius: 10px;
  border: 1.5px solid var(--pmm-border);
  background: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--pmm-accent-dark);
  transition: background .15s ease;
}
.pmm-swap-btn:hover { background: color-mix(in srgb, var(--pmm-accent) 8%, white); }
.pmm-swap-btn svg { width: 18px; height: 18px; transition: transform .35s cubic-bezier(.34,1.56,.64,1); }
.pmm-swap-btn.spin svg { transform: rotate(180deg); }

.pmm-field-in { order: 1; }
.pmm-field-mm { order: 3; }
.pmm-swap-row.swapped .pmm-field-in { order: 3; }
.pmm-swap-row.swapped .pmm-field-mm { order: 1; }

.pmm-note {
  font-size: 11.5px;
  color: var(--pmm-muted);
  line-height: 1.55;
  background: color-mix(in srgb, var(--pmm-accent) 6%, white);
  border: 1px solid color-mix(in srgb, var(--pmm-accent) 16%, white);
  border-radius: 12px;
  padding: 11px 13px;
  margin-top: 4px;
  margin-bottom: 0;
}
.pmm-note.pmm-note-linear {
  background: rgba(59,130,246,0.09);
  border-color: rgba(59,130,246,0.26);
}

.pmm-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin: 22px 0 10px 4px;
}
.pmm-section-title { font-size: 13px; font-weight: 700; color: var(--pmm-text); letter-spacing: -.1px; }

.pmm-type-pill {
  font-size: 9.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .4px;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.pmm-type-pill.pmm-linear { color: #2563eb; background: rgba(59,130,246,0.1); }
.pmm-type-pill.pmm-nominal { color: var(--pmm-accent-dark); background: color-mix(in srgb, var(--pmm-accent) 12%, white); }

.pmm-card-linear {
  background: linear-gradient(165deg, #e7effe 0%, #f2f6fe 60%, #fbfcff 100%);
  border-color: #cddbf7;
}
.pmm-card-linear input { background: #ffffff; }
.pmm-card-linear .pmm-dropdown-list { background: #ffffff; }

.pmm-card-gas {
  background: linear-gradient(165deg, #ffe9dc 0%, #fff1e6 55%, #fffaf6 100%);
  border-color: #f7d3b8;
}
.pmm-card-gas input { background: #ffffff; }

.pmm-gas-measurer { display: flex; align-items: flex-end; gap: 10px; margin-bottom: 14px; }
.pmm-gas-measurer .pmm-field { flex: 1; }
.pmm-gas-unit { font-size: 12.5px; color: var(--pmm-muted); padding-bottom: 10px; flex-shrink: 0; }

.pmm-gas-result {
  padding: 10px 12px;
  border-radius: 10px;
  background: #fff;
  border: 1.5px dashed var(--pmm-border);
  font-size: 12.5px;
  color: var(--pmm-muted);
  min-height: 20px;
}
.pmm-gas-result .pmm-gas-hit { color: var(--pmm-accent-dark); font-weight: 700; font-family: var(--pmm-mono); font-size: 14px; }
.pmm-gas-result .pmm-gas-hit-detail { color: var(--pmm-muted); }

table.pmm-ref-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
table.pmm-ref-table th {
  text-align: left;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .3px;
  color: var(--pmm-muted);
  padding: 0 6px 8px 6px;
  border-bottom: 1.5px solid var(--pmm-border);
}
table.pmm-ref-table td {
  padding: 7px 6px;
  border-bottom: 1px solid var(--pmm-border);
  font-family: var(--pmm-mono);
  font-weight: 600;
}
table.pmm-ref-table tr:last-child td { border-bottom: none; }
table.pmm-ref-table td.pmm-col-frac { color: var(--pmm-text); }
table.pmm-ref-table td.pmm-col-dec { color: var(--pmm-muted); font-weight: 500; }
table.pmm-ref-table td.pmm-col-mm { color: var(--pmm-accent-dark); }
table.pmm-ref-table tr.pmm-metric td { color: var(--pmm-muted); font-style: italic; }
table.pmm-ref-table tr.pmm-metric td.pmm-col-frac { font-style: normal; color: #2563eb; }
table.pmm-ref-table tr.pmm-gas-match td { background: color-mix(in srgb, var(--pmm-accent) 10%, white); }
table.pmm-ref-table tr.pmm-gas-match td.pmm-col-frac { color: var(--pmm-accent-dark); }

/* ============================================================
   TOOL: PORTE LOGICHE — namespacato pl-*, dentro
   #tools-porte-logiche-view
   ============================================================ */
#tools-porte-logiche-view {
  --pl-accent: #a855f7;
  --pl-accent-2: #c084fc;
  --pl-accent-dark: #7e22ce;
  --pl-text: #1b2027;
  --pl-muted: #6b7280;
  --pl-border: #e7e8ec;
  --pl-card-bg: #fbfbfc;
  --pl-mono: "SF Mono", "Cascadia Code", Consolas, Menlo, monospace;
  --pl-on: #16a34a;
  --pl-on-soft: #dcfce7;
  --pl-on-line: #22c55e;
  --pl-off-line: #c7cbd3;
}

.pl-panel { width: 100%; max-width: 480px; margin: 0 auto; color: var(--pl-text); }

.pl-header { text-align: center; margin-bottom: 22px; }
.pl-icon-badge {
  width: 46px; height: 46px;
  margin: 0 auto 14px auto;
  border-radius: 14px;
  background: linear-gradient(140deg, var(--pl-accent), var(--pl-accent-2));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px -6px rgba(168,85,247,0.5);
}
.pl-icon-badge svg { width: 24px; height: 24px; color: #fff; }
.pl-header h1 { font-size: 21px; margin: 0 0 6px 0; font-weight: 700; letter-spacing: -.2px; color: var(--pl-text); }
.pl-header p { font-size: 13px; color: var(--pl-muted); margin: 0; }

.pl-jumpnav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin: 0 0 22px;
}
.pl-jumpnav button {
  font-family: var(--pl-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--pl-accent-dark);
  background: #fff;
  border: 1px solid var(--pl-border);
  border-radius: 999px;
  padding: 6px 13px;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease, transform .1s ease;
}
.pl-jumpnav button:hover { background: color-mix(in srgb, var(--pl-accent) 10%, white); }
.pl-jumpnav button.active {
  background: linear-gradient(140deg, var(--pl-accent), var(--pl-accent-2));
  border-color: transparent;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px -6px rgba(168,85,247,0.55);
}

.pl-gate-card {
  background: linear-gradient(165deg, #fff 0%, #fbfbfc 100%);
  border: 1px solid var(--pl-border);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: 0 10px 24px -18px rgba(20,20,30,0.18);
}
.pl-gate-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
}
.pl-gate-name { font-size: 16px; font-weight: 700; letter-spacing: -.1px; color: var(--pl-text); }
.pl-gate-expr { font-family: var(--pl-mono); font-size: 12.5px; color: var(--pl-accent-dark); font-weight: 600; }

.pl-gate-body {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}
.pl-gate-svg-wrap {
  flex-shrink: 0;
  background: var(--pl-card-bg);
  border: 1px solid var(--pl-border);
  border-radius: 10px;
  padding: 6px 4px;
}
.pl-gate-svg-wrap svg { display: block; width: 116px; height: 66px; }

.pl-gate-controls { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.pl-io-row { display: flex; align-items: center; gap: 8px; }
.pl-io-label { font-size: 11px; font-weight: 700; color: var(--pl-muted); width: 14px; }

.pl-toggle-btn {
  font-family: var(--pl-mono);
  font-size: 15px;
  font-weight: 700;
  width: 40px; height: 32px;
  border-radius: 8px;
  border: 1.5px solid var(--pl-border);
  background: #fff;
  color: var(--pl-muted);
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.pl-toggle-btn:hover { border-color: var(--pl-accent); }
.pl-toggle-btn.pl-on { background: var(--pl-on-soft); border-color: var(--pl-on); color: var(--pl-on); }

.pl-output-row { display: flex; align-items: center; gap: 8px; margin-top: 2px; }
.pl-led {
  width: 15px; height: 15px;
  border-radius: 50%;
  background: #d7dae0;
  border: 1px solid #c3c7cf;
  transition: background .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.pl-led.pl-on {
  background: var(--pl-on-line);
  border-color: var(--pl-on);
  box-shadow: 0 0 0 4px rgba(34,197,94,0.18), 0 0 8px rgba(34,197,94,0.5);
}
.pl-output-val { font-family: var(--pl-mono); font-weight: 700; font-size: 14px; }
.pl-output-val.pl-on { color: var(--pl-on); }
.pl-output-val.pl-off { color: var(--pl-muted); }

table.pl-truth { width: 100%; border-collapse: collapse; font-size: 12.5px; margin-top: 4px; }
table.pl-truth th {
  text-align: center;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .3px;
  color: var(--pl-muted);
  padding: 0 4px 6px;
  border-bottom: 1.5px solid var(--pl-border);
}
table.pl-truth td {
  text-align: center;
  padding: 5px 4px;
  border-bottom: 1px solid var(--pl-border);
  font-family: var(--pl-mono);
  font-weight: 600;
  color: var(--pl-muted);
}
table.pl-truth tr:last-child td { border-bottom: none; }
table.pl-truth tr.pl-current td { background: color-mix(in srgb, var(--pl-accent) 10%, white); color: var(--pl-text); }
table.pl-truth tr.pl-current td.pl-out-cell.pl-on { color: var(--pl-on); }

.pl-footer {
  margin-top: 4px;
  text-align: center;
  font-size: 11px;
  color: var(--pl-muted);
}