:root {
  color-scheme: dark;
  --bg: #0b0911;
  --card: #171320;
  --line: #30263f;
  --text: #f6f0ff;
  --muted: #a99db6;
  --purple: #a855f7;
  --pink: #ec4899;
  --danger: #fb7185;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 80% 0, #271237 0, transparent 35%), var(--bg);
  color: var(--text);
  font: 14px/1.3 system-ui, sans-serif;
}

header, main {
  max-width: 1180px;
  margin: auto;
  padding: 16px 24px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

h1 {
  margin: .05em 0;
  font-size: clamp(1.65rem, 4vw, 2.7rem);
  line-height: 1.08;
}

h1 span {
  background: linear-gradient(90deg, var(--purple), var(--pink));
  background-clip: text;
  color: transparent;
}

h2 {
  margin: .25rem 0;
  font-size: 1rem;
  line-height: 1.2;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 11px;
}

.zone, .panel {
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--card) 94%, transparent);
  box-shadow: 0 8px 28px #0005;
}

.track {
  min-height: 32px;
  margin: 8px 0;
  color: var(--muted);
}

button, select, input {
  min-height: 32px;
  padding: 6px 11px;
  border: 1px solid #48345e;
  border-radius: 8px;
  background: #211a2c;
  color: var(--text);
  font: inherit;
}

button {
  cursor: pointer;
  font-size: .86rem;
  font-weight: 700;
}

button:hover, button:focus {
  border-color: var(--pink);
  box-shadow: 0 0 0 2px #ec489933;
}

.controls, .tabs, .list-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.controls button { flex: 1; }
.controls + label { margin-top: 4px; }
.danger { color: var(--danger); }

.eq-controls {
  display: grid;
  gap: 4px;
  margin-top: 5px;
}

.zone-actions {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 4px;
}

.zone-actions button {
  min-height: 24px;
  padding: 2px 7px;
  font-size: .72rem;
}

.loudness.active {
  border-color: var(--pink);
  background: linear-gradient(110deg, #7c3aed, var(--pink));
}

label {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: .88rem;
}

input[type="range"] {
  width: 100%;
  min-height: 26px;
  padding: 3px 6px;
  accent-color: var(--pink);
}

.panel { margin-top: 14px; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 14px;
  margin-bottom: 10px;
}

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.checks label {
  display: flex;
  align-items: center;
}

.tabs { margin: 11px 0; }
.tabs .active, #group {
  border: 0;
  background: linear-gradient(110deg, #7c3aed, var(--pink));
}

.list-row {
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  border-bottom: 1px solid var(--line);
}

.muted { color: var(--muted); }

#notice:not(:empty) {
  margin-bottom: 10px;
  padding: 8px 10px;
  border: 1px solid var(--pink);
  border-radius: 8px;
}

@media (max-width: 640px) {
  header {
    align-items: flex-start;
    flex-direction: column;
    gap: 9px;
  }

  .form-grid { grid-template-columns: 1fr; }
  header, main { padding: 12px 18px; }
  .zone { padding: 11px 14px; }
}