:root {
  color-scheme: dark;
  --bg: #0b0d11;
  --bg-elev: #151922;
  --panel: #1a1f29;
  --edge: #2a3140;
  --text: #d9dfeb;
  --muted: #8e97a9;
  --accent: #4ea1ff;
  --accent-soft: #2f6dac;
  --danger: #d35d5d;
  --good: #78c46a;
  --curve: #74b8ff;
  --node: #ffd166;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at 20% 0%, #141a24 0%, var(--bg) 40%);
  color: var(--text);
  font-family: "Segoe UI", "Noto Sans", sans-serif;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 14px;
  gap: 12px;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-elev);
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 10px;
}

.transport-group,
.status-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.meter-strip {
  background: #101622;
  border: 1px solid var(--edge);
  border-radius: 6px;
  padding: 5px 8px;
  min-width: 112px;
  justify-content: space-between;
}

.meter-strip strong {
  font-family: Consolas, "Courier New", monospace;
  color: #c8d7ee;
  font-size: 12px;
}

.btn {
  border: 1px solid var(--edge);
  background: linear-gradient(180deg, #273146 0%, #1d2431 100%);
  color: var(--text);
  border-radius: 7px;
  padding: 7px 10px;
  font-size: 13px;
  cursor: pointer;
}

.btn:hover {
  border-color: var(--accent-soft);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.file-label {
  display: inline-block;
}

.stream-load {
  display: flex;
  gap: 8px;
}

input[type="url"] {
  width: 230px;
  background: #111722;
  color: var(--text);
  border: 1px solid var(--edge);
  border-radius: 6px;
  padding: 7px 8px;
}

input[type="range"],
select,
input[type="number"] {
  accent-color: var(--accent);
}

.main-content {
  display: grid;
  grid-template-columns: minmax(540px, 1fr) 350px;
  gap: 12px;
  min-height: 0;
  flex: 1;
}

.graph-section {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.graph-section.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset;
}

#eqCanvas {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid #222c3d;
  background: linear-gradient(180deg, #0f141e 0%, #0a0f18 100%);
  cursor: crosshair;
}

.timeline-wrap {
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}

.drop-hint {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.side-panel {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 12px;
  overflow: auto;
}

.panel-block h2 {
  margin: 0 0 10px;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #b9c4d7;
}

.preset-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.preset-controls select {
  flex: 1;
  background: #111722;
  color: var(--text);
  border: 1px solid var(--edge);
  border-radius: 6px;
  padding: 6px;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}

#analyzerCanvas {
  width: 100%;
  height: auto;
  border: 1px solid #222c3d;
  border-radius: 6px;
  background: linear-gradient(180deg, #0f141e 0%, #0a0f18 100%);
}

.bands-container {
  display: grid;
  gap: 8px;
}

.band-row {
  border: 1px solid var(--edge);
  border-radius: 8px;
  padding: 8px;
  background: #121825;
}

.band-row.active {
  border-color: var(--accent);
}

.band-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 13px;
}

.band-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  font-size: 12px;
}

.field {
  display: grid;
  grid-template-columns: 54px 1fr 56px;
  gap: 6px;
  align-items: center;
}

.control-tip {
  position: relative;
}

.control-tip::after {
  content: attr(data-tip);
  position: absolute;
  left: 0;
  bottom: 100%;
  transform: translateY(-4px);
  max-width: 220px;
  font-size: 10px;
  line-height: 1.2;
  color: #c4cedf;
  background: rgba(10, 14, 22, 0.94);
  border: 1px solid #2b364b;
  border-radius: 4px;
  padding: 3px 5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 110ms ease;
  z-index: 30;
}

.control-tip:hover::after {
  opacity: 1;
}

.field.freq-field {
  grid-template-columns: 54px 1fr 78px 56px;
}

.field select,
.field input[type="number"] {
  background: #0f1520;
  color: var(--text);
  border: 1px solid var(--edge);
  border-radius: 4px;
  padding: 4px;
}

.field input[type="text"] {
  background: #0f1520;
  color: var(--text);
  border: 1px solid var(--edge);
  border-radius: 4px;
  padding: 4px;
  width: 100%;
}

.readout {
  text-align: right;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 1060px) {
  .main-content {
    grid-template-columns: 1fr;
  }

  .side-panel {
    max-height: 45vh;
  }
}