:root {
  color-scheme: dark;
  --bg: #d7d9de;
  --panel: #f3f4f6;
  --panel-2: #eceff2;
  --line: #8e949b;
  --line-strong: #31373f;
  --text: #1b1f25;
  --muted: #5d646d;
  --accent: #ff6a00;
  --danger: #b1382f;
  --ok: #2a6f3d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #dbdde2, var(--bg));
  color: var(--text);
}

.app {
  width: min(760px, calc(100% - 0.8rem));
  margin: 0.4rem auto 0.8rem;
  display: grid;
  gap: 0.45rem;
}

.app-header {
  padding: 0.15rem 0.15rem 0.05rem;
}

.app-header h1 {
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.app-header p {
  margin: 0.2rem 0 0;
  font-size: 0.69rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.45rem;
  box-shadow: inset 0 0 0 1px #ffffff80;
}

.top-panels {
  --panel-height: 172px;
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 0.4rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
}

.span-2 {
  grid-column: 1 / -1;
}

.row {
  display: grid;
  gap: 0.24rem;
  align-content: start;
  background: #f8f9fa;
  border: 1px solid #a9afb7;
  border-radius: 4px;
  padding: 0.32rem;
}

.waveform-row {
  grid-template-columns: 82px 1fr;
  align-items: center;
}

.frequency-row,
.volume-row {
  grid-template-columns: 1fr;
}

.frequency-row input[type="number"],
.volume-row input[type="number"] {
  max-width: 84px;
  justify-self: end;
}

.start-row {
  grid-template-columns: 1fr;
  justify-items: center;
  text-align: center;
  gap: 0.2rem;
}

label,
legend {
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #2f363f;
  font-weight: 700;
}

input[type="number"],
select,
button {
  font: inherit;
  color: var(--text);
}

input[type="number"],
select {
  width: 100%;
  min-height: 1.9rem;
  background: #ffffff;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 0.2rem 0.34rem;
  font-size: 0.85rem;
}

input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
}

.primary-btn {
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 0.34rem 0.45rem;
  background: var(--accent);
  color: #111;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn.running {
  background: #1f252b;
  color: #f4f5f7;
}

.status {
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  justify-self: center;
}

.status.running {
  color: var(--ok);
}

.status.stopped {
  color: var(--danger);
}

.feature {
  margin: 0;
  border: 1px solid #a9afb7;
  border-radius: 4px;
  padding: 0.3rem;
  background: #f8f9fa;
  display: grid;
  gap: 0.24rem;
}

.feature .row {
  padding: 0.22rem;
  border-color: #c3c8ce;
  background: #fdfdfd;
}

.feature legend {
  padding: 0 0.2rem;
}

.feature-label {
  display: inline-flex;
  align-items: center;
  gap: 0.34rem;
  font-size: 0.65rem;
}

.feature.is-disabled {
  opacity: 0.55;
}

.scope-card {
  padding: 0.35rem;
}

.scope-card h2 {
  margin: 0 0 0.25rem;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

#scopeCanvas {
  display: block;
  width: 100%;
  max-width: 100%;
  height: var(--panel-height, 172px);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: #11161c;
}

.image-card {
  padding: 0.35rem;
  display: grid;
  align-content: start;
}

.image-card h2 {
  margin: 0 0 0.25rem;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

#machineImage {
  display: block;
  width: auto;
  height: var(--panel-height, 172px);
  max-width: 100%;
  object-fit: contain;
  object-position: center;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: #d5d8dc;
  justify-self: center;
}

@media (max-width: 700px) {
  .top-panels {
    --panel-height: 140px;
    grid-template-columns: 1fr 1fr;
  }

  .app {
    width: calc(100% - 0.6rem);
  }

  .app-header h1 {
    font-size: 0.82rem;
  }

  .waveform-row {
    grid-template-columns: 70px 1fr;
  }
}

@media (min-width: 680px) {
  .controls {
    grid-template-columns: 1fr 1fr;
  }
}

.copyright-note {
  margin: 0.2rem 0 0;
  text-align: center;
  font-size: 0.58rem;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: #4f555d;
}