.nl-d { background: var(--cream); padding: 96px 0 120px; }
.nl-d__wrap { max-width: 1000px; margin: 0 auto; }
.nl-d__head { text-align: center; margin-bottom: 40px; }
.nl-d__head h2 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(32px, 4.4vw, 56px); margin: 0; }

.nl-d__tool {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-soft);
}
@media (min-width: 900px) { .nl-d__tool { grid-template-columns: 1fr 1.4fr; align-items: center; } }

.nl-d__sliders { display: flex; flex-direction: column; gap: 22px; }
.nl-d__sliders label { display: grid; grid-template-columns: 90px 1fr auto; align-items: center; gap: 14px; }
.nl-d__label { color: var(--teal); font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.nl-d__val { font-family: var(--font-serif); color: var(--navy); font-size: 17px; min-width: 72px; text-align: right; }

.nl-d__sliders input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--line);
  border-radius: 2px;
  outline: none;
}
.nl-d__sliders input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  border: 3px solid var(--white);
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.nl-d__sliders input[type=range]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  border: 3px solid var(--white);
}

.nl-d__readout {
  padding: 24px;
  background: var(--cream);
  border-radius: var(--radius-md);
  text-align: center;
}
.nl-d__waveform { width: 100%; height: 100px; }
.nl-d__eq { font-family: var(--font-serif); font-size: clamp(28px, 4vw, 42px); color: var(--navy); margin: 12px 0 8px; }
.nl-d__eq-num { color: var(--teal); }
.nl-d__formula { font-family: var(--font-serif); font-style: italic; color: var(--ink-muted); font-size: 15px; }

.nl-d__capture {
  margin-top: 24px;
  padding: 24px 28px;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-lg);
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  animation: nldSlideIn 0.4s ease;
}
.nl-d__capture[hidden] { display: none; }
.nl-d__capture p { margin: 0; font-family: var(--font-serif); font-size: 20px; }
.nl-d__form { display: flex; gap: 10px; }
.nl-d__form input { padding: 12px 16px; border-radius: var(--radius-pill); border: 0; font-size: 14px; background: var(--white); min-width: 220px; font-family: var(--font-sans); }
@keyframes nldSlideIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }