:root {
  --bg: #0b1118;
  --panel: #111b24;
  --panel-2: #162432;
  --text: #d5dfeb;
  --muted: #93a2b6;
  --accent: #30c5ff;
  --danger: #ff4c4c;
  --warning: #ff9b2f;
  --grid: #203042;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% -20%, #1f3244 0%, var(--bg) 45%);
  min-height: 100vh;
}

.app {
  width: min(1200px, 96vw);
  margin: 1rem auto;
  display: grid;
  gap: 0.9rem;
}

.topbar,
.controls-panel,
.meters,
.canvas-wrap {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid #1f3143;
  border-radius: 10px;
  padding: 0.8rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

h1 {
  margin: 0;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.controls-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.controls-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  align-items: end;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.input-control {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.control-title {
  display: block;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.45rem;
}

.slider-control {
  gap: 0.45rem;
}

.control-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.6rem;
  color: var(--muted);
}

.control-head strong {
  font-size: 0.85rem;
  color: var(--text);
  background: #0a141d;
  border: 1px solid #294056;
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
  font-weight: 600;
  white-space: nowrap;
}

button,
select,
input[type="range"] {
  width: 100%;
}

button,
select {
  border: 1px solid #2e455e;
  border-radius: 8px;
  background: #0d1720;
  color: var(--text);
  padding: 0.5rem;
}

select {
  min-width: 0;
}

button {
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  font-size: 0.85rem;
  color: var(--muted);
}

.meters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.8rem;
}

.label {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

strong {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.canvas-wrap {
  height: min(70vh, 560px);
  padding: 0;
  overflow: hidden;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: #060b11;
}

.error {
  margin: 0;
  color: var(--danger);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .app {
    width: 98vw;
    margin: 0.5rem auto;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 1200px) {
  body {
    overflow: hidden;
  }

  .app {
    width: min(1900px, 98vw);
    height: calc(100vh - 1rem);
    margin: 0.5rem auto;
    grid-template-columns: minmax(360px, 430px) minmax(0, 1fr);
    grid-template-rows: auto auto auto minmax(0, 1fr);
    grid-template-areas:
      "topbar canvas"
      "controls canvas"
      "meters canvas"
      "error canvas";
    align-items: stretch;
    overflow: hidden;
  }

  .topbar {
    grid-area: topbar;
  }

  .controls-panel {
    grid-area: controls;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-content: start;
  }

  .meters {
    grid-area: meters;
    grid-template-columns: 1fr;
  }

  .canvas-wrap {
    grid-area: canvas;
    height: 100%;
    min-height: 0;
  }

  .error {
    grid-area: error;
  }
}