:root {
  --paper: #e4ddd1;
  --ink: #1d1a16;
  --muted: #6d665d;
  --faint: #8a8378;
  --card: rgba(247, 243, 236, 0.94);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.app {
  height: 100%;
}

canvas {
  position: fixed;
  inset: 0;
  display: block;
  width: 100vw;
  height: 100vh;
  background: var(--paper);
}

.panel {
  position: fixed;
  z-index: 2;
  right: 28px;
  bottom: 28px;
  width: 300px;
  padding: 16px 16px 14px;
  background: var(--card);
  border: 1px solid rgba(29, 26, 22, 0.16);
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(40, 30, 20, 0.1);
}

.trend {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.trend[hidden] { display: none; }

.sliders {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.slider {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.panel.is-playing .slider { opacity: 0.42; }
.panel.is-playing .slider.is-active { opacity: 1; }

.spectrum {
  font-size: 13px;
}

.poles {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
}

.poles .on { color: var(--ink); }

.track {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 2.1em;
  gap: 10px;
  align-items: center;
}

.track b {
  font-weight: 550;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.slider input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}

.slider input[type="range"]:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.slider input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: linear-gradient(to right, var(--ink) var(--t, 50%), rgba(29, 26, 22, 0.22) var(--t, 50%));
}

.slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  margin-top: -7px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid #f7f3ec;
  box-shadow: 0 0 0 1px rgba(29, 26, 22, 0.45);
}

.slider input[type="range"]::-moz-range-track {
  height: 2px;
  background: rgba(29, 26, 22, 0.22);
  border: none;
}

.slider input[type="range"]::-moz-range-progress {
  height: 2px;
  background: var(--ink);
}

.slider input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid #f7f3ec;
  box-shadow: 0 0 0 1px rgba(29, 26, 22, 0.45);
}

@media (max-width: 800px) {
  .panel {
    left: 16px;
    right: 16px;
    bottom: 16px;
    width: auto;
  }
}