/* ============================================================
   Engineer Tools styles — resistor, analog, divider, RC, relay
   ============================================================ */

/* ===== Common calc layout ===== */
.calc-tool { padding: 18px; display: grid; gap: 16px; }
.calc-inputs { display: grid; gap: 10px; }
.calc-input { display: flex; flex-direction: column; gap: 4px; }
.calc-input label {
  font: 600 11px 'JetBrains Mono', monospace;
  text-transform: uppercase; letter-spacing: 0.8px;
  color: #64748b;
}
.calc-input input, .calc-input select {
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  padding: 9px 12px;
  font: 500 14px 'JetBrains Mono', monospace;
  color: #0f172a;
  outline: none;
  transition: border-color .12s;
}
.calc-input input:focus, .calc-input select:focus { border-color: #0f172a; }
.calc-output {
  background: #0f172a;
  color: #fff;
  border-radius: 8px;
  padding: 14px 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.calc-out-row {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px;
  border-bottom: 1px dashed rgba(255,255,255,0.08);
  padding-bottom: 8px;
}
.calc-out-row:last-child { border-bottom: 0; padding-bottom: 0; }
.calc-out-row .k {
  font: 500 11px 'JetBrains Mono', monospace;
  text-transform: uppercase; letter-spacing: 0.6px;
  color: #94a3b8;
}
.calc-out-row .v {
  font: 700 16px 'JetBrains Mono', monospace;
  color: #fbbf24;
}
.calc-out-row .v.big {
  font-size: 22px;
  color: #fff;
}

/* ===== Resistor color code ===== */
.resistor-tool { padding: 18px; display: grid; gap: 16px; }
.r-display {
  background: #fafaf7;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
  display: grid; gap: 12px;
}
.r-tabs { display: flex; gap: 6px; }
.r-tabs button {
  flex: 1;
  font: 600 12px 'JetBrains Mono', monospace;
  padding: 8px 12px;
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  color: #64748b;
  cursor: pointer;
  transition: all .12s;
}
.r-tabs button.active {
  background: #0f172a;
  color: #fff;
  border-color: #0f172a;
}
.r-body {
  display: grid;
  grid-template-columns: 24px 1fr 24px;
  align-items: center;
  gap: 4px;
  margin: 8px 0;
}
.r-leg {
  height: 4px;
  background: linear-gradient(to right, transparent, #94a3b8);
}
.r-body .r-leg:last-child { background: linear-gradient(to left, transparent, #94a3b8); }
.r-core {
  background: #c4a079;
  border-radius: 22px;
  height: 56px;
  display: flex; align-items: center;
  padding: 0 14px;
  box-shadow:
    inset 0 6px 12px rgba(0,0,0,0.18),
    inset 0 -6px 12px rgba(0,0,0,0.1),
    0 2px 8px rgba(0,0,0,0.1);
  position: relative;
}
.r-bands {
  display: flex;
  gap: 6px;
  width: 100%;
  justify-content: space-evenly;
}
.r-band {
  width: 8px;
  height: 56px;
  margin-top: -1px;
  box-shadow: inset 0 0 8px rgba(0,0,0,0.25);
}
.r-readout {
  display: flex; align-items: baseline; justify-content: space-between;
  background: #0f172a;
  color: #fff;
  border-radius: 6px;
  padding: 10px 14px;
}
.r-readout .val {
  font: 700 22px 'JetBrains Mono', monospace;
  color: #fbbf24;
}
.r-readout .tol {
  font: 500 13px 'JetBrains Mono', monospace;
  color: #94a3b8;
}
.r-controls { display: grid; gap: 8px; }
.r-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  align-items: center;
  gap: 10px;
}
.r-lbl {
  font: 600 11px 'JetBrains Mono', monospace;
  text-transform: uppercase; letter-spacing: 0.6px;
  color: #64748b;
}
.r-chips {
  display: flex; flex-wrap: wrap; gap: 4px;
}
.r-chip {
  width: 22px; height: 22px;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .1s;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.15);
  padding: 0;
}
.r-chip:hover { transform: scale(1.15); }
.r-chip.active {
  border-color: #0f172a;
  box-shadow: 0 0 0 2px #fff, inset 0 0 0 1px rgba(0,0,0,0.15);
}

/* ===== Analog finder ===== */
.analog-tool { padding: 14px 18px 18px; }
.at-search { margin-bottom: 12px; }
.at-search input {
  width: 100%;
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  padding: 11px 14px;
  font: 500 14px 'JetBrains Mono', monospace;
  outline: none;
}
.at-search input:focus { border-color: #0f172a; }
.at-list {
  max-height: 320px; overflow-y: auto;
  border: 1px solid #e2e8f0; border-radius: 6px;
}
.at-row {
  display: grid;
  grid-template-columns: 110px 18px 110px 1fr;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid #f1f5f9;
  font-size: 13px;
}
.at-row:last-child { border-bottom: 0; }
.at-row:hover { background: #f8fafc; }
.at-ru {
  font: 700 13px 'JetBrains Mono', monospace;
  color: #0f172a;
}
.at-arrow { color: #c8102e; font-weight: bold; text-align: center; }
.at-en {
  font: 600 13px 'JetBrains Mono', monospace;
  color: #475569;
}
.at-note { font-size: 12px; color: #64748b; }
.at-empty { padding: 24px; text-align: center; color: #64748b; font-size: 14px; }

/* ===== Relay picker ===== */
.relay-results { display: grid; gap: 8px; }
.relay-match {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 12px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 13px;
}
.rm-name {
  font: 700 13px 'JetBrains Mono', monospace;
  color: #0f172a;
}
.rm-spec { color: #475569; font-size: 12px; }
.rm-stock {
  font: 600 11px 'JetBrains Mono', monospace;
  color: #16a34a;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.relay-empty {
  padding: 20px; text-align: center; color: #64748b;
  background: #fffbe6; border: 1px solid #fde68a; border-radius: 6px;
}

/* ===== RC canvas ===== */
.rc-canvas {
  background: #0a0a0a;
  border-radius: 6px;
  width: 100%;
  height: auto;
  margin-top: 8px;
}

/* ===== Responsive ===== */
@media (min-width: 640px) {
  .calc-inputs { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
  .at-row { grid-template-columns: 130px 24px 130px 1fr; }
}