:root {
  color-scheme: dark;
  --bg: #090c10;
  --panel: #10161d;
  --panel-2: #151d26;
  --line: #283440;
  --text: #edf2f5;
  --muted: #8e9aa6;
  --cyan: #79efc0;
  --blue: #61b7ff;
  --orange: #fdb022;
  --danger: #ff776d;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; }
button { cursor: pointer; }
#app { min-height: 100%; padding: 22px; }
.shell { max-width: 760px; margin: 0 auto; }
.eyebrow { color: var(--cyan); font: 11px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .14em; text-transform: uppercase; }
h1 { margin: 7px 0 4px; font-size: clamp(25px, 6vw, 38px); letter-spacing: -.04em; }
.subtitle { color: var(--muted); margin: 0 0 18px; }
.notice { border: 1px solid #5c461c; background: #211b0e; color: #f7d58a; border-radius: 10px; padding: 11px 13px; font-size: 12px; margin-bottom: 14px; }
.notice strong { color: var(--orange); }
.card { border: 1px solid var(--line); background: var(--panel); border-radius: 14px; padding: 16px; margin-bottom: 12px; }
.card h2 { font-size: 14px; margin: 0 0 13px; letter-spacing: .06em; text-transform: uppercase; }
.presets { display: flex; flex-wrap: wrap; gap: 7px; }
button, select, input { color: var(--text); background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; }
button { min-height: 42px; padding: 8px 12px; }
button:hover, button:focus-visible, select:focus-visible, input:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
button.active { color: var(--bg); background: var(--cyan); border-color: var(--cyan); }
.channels { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.channel { min-width: 0; }
.channel.left { border-left: 3px solid var(--blue); }
.channel.right { border-left: 3px solid var(--cyan); }
.channel-title { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 10px; }
.channel-title strong { font-size: 16px; }
.channel-title span { color: var(--muted); font: 12px ui-monospace, monospace; }
.field { display: grid; gap: 5px; color: var(--muted); font-size: 12px; }
input[type=number] { width: 100%; padding: 10px; font-size: 18px; }
input[type=range] { width: 100%; accent-color: var(--cyan); }
.test { width: 100%; margin-top: 11px; min-height: 36px; font-size: 12px; }
.meter { height: 7px; display: flex; gap: 3px; margin-top: 12px; }
.meter i { flex: 1; border-radius: 4px; background: var(--line); }
.meter i.on { background: var(--cyan); }
.controls { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 10px; align-items: end; }
.controls label { display: grid; gap: 5px; color: var(--muted); font-size: 12px; }
select { width: 100%; padding: 11px 9px; }
.master { display: flex; gap: 12px; align-items: center; margin-top: 14px; color: var(--muted); font-size: 12px; }
.master input { flex: 1; }
.primary { width: 100%; margin-top: 14px; color: var(--bg); background: var(--cyan); border-color: var(--cyan); font-weight: 700; font-size: 16px; }
.primary.stop { color: var(--text); background: #3a2022; border-color: #7b3639; }
.status { display: flex; justify-content: space-between; gap: 10px; margin-top: 12px; color: var(--muted); font: 12px ui-monospace, monospace; }
.status strong { color: var(--text); }
.help { color: var(--muted); font-size: 12px; margin: 13px 0 0; }
.help a { color: var(--blue); }
#toast { position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 8px 12px; border-radius: 8px; font-size: 12px; opacity: 0; pointer-events: none; transition: opacity .2s; }
#toast.show { opacity: 1; }
@media (max-width: 520px) {
  #app { padding: 16px; }
  .channels, .controls { grid-template-columns: 1fr; }
  .channel { padding: 14px; }
}