:root {
  --bg: #0a0c14;
  --bg-2: #10131f;
  --card: #141828;
  --card-2: #1a1f33;
  --line: #262c45;
  --text: #e8ebf7;
  --muted: #8a92b2;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --radius: 16px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; }

body {
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(34, 211, 238, 0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(167, 139, 250, 0.12), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, "Segoe UI", Inter, Roboto, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.top {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 24px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo { width: 40px; height: 40px; color: var(--accent); flex: none; }
.brand h1 { margin: 0; font-size: 1.35rem; letter-spacing: -0.01em; }
.brand p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.badge {
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-2);
  color: var(--muted);
  white-space: nowrap;
}
.badge.ready { color: var(--accent); border-color: rgba(34, 211, 238, 0.35); }
.badge.error { color: #fb7185; border-color: rgba(251, 113, 133, 0.4); }

/* Layout */
.layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 20px;
  align-items: start;
}

.stage-card, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 20px 50px -25px rgba(0, 0, 0, 0.7);
}

/* Stage */
.stage {
  position: relative;
  height: min(68vh, 680px);
  min-height: 320px;
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 50%, #131830 0%, #0c0f1c 100%);
}
canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}
.hint {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-align: center;
  padding: 24px;
  color: var(--muted);
  pointer-events: none;
  transition: opacity 0.25s;
}
.hint strong { color: var(--text); font-size: 1.15rem; }
.hint-icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  font-size: 1.6rem;
  border-radius: 50%;
  border: 1px dashed var(--accent-2);
  color: var(--accent-2);
  margin-bottom: 6px;
}
.hint.gone { opacity: 0; }
.stats {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-size: 0.75rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

/* Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
}
.presets, .actions { display: flex; flex-wrap: wrap; gap: 8px; }

button { font: inherit; color: inherit; cursor: pointer; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.chip {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card-2);
  font-size: 0.85rem;
  transition: border-color 0.15s, transform 0.1s;
}
.chip:hover { border-color: var(--accent-2); }
.chip:active { transform: scale(0.97); }

.btn {
  padding: 8px 16px;
  border-radius: 10px;
  border: 0;
  font-weight: 600;
  font-size: 0.9rem;
  color: #07131a;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  transition: filter 0.15s, transform 0.1s;
}
.btn:hover:not(:disabled) { filter: brightness(1.1); }
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn:disabled { opacity: 0.35; cursor: default; }
.btn-ghost {
  color: var(--text);
  background: var(--card-2);
  border: 1px solid var(--line);
}
.btn.recording { background: #fb7185; color: #1a0508; }

/* Panel */
.panel { padding: 20px; }
.panel h2 { margin: 0 0 16px; font-size: 1rem; }
.field { margin-bottom: 20px; }
.field label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 8px;
}
.field output { color: var(--text); font-variant-numeric: tabular-nums; }
.field small { display: block; margin-top: 6px; color: var(--muted); font-size: 0.75rem; }

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin: 0;
}

.seg {
  display: flex;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 3px;
  gap: 3px;
}
.seg button {
  flex: 1;
  padding: 6px 4px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  font-size: 0.82rem;
  color: var(--muted);
}
.seg button.on { background: var(--card-2); color: var(--text); box-shadow: 0 0 0 1px var(--line); }

.switches { display: grid; gap: 12px; }
.switch {
  display: flex !important;
  justify-content: flex-start !important;
  align-items: center;
  gap: 10px;
  margin: 0 !important;
  color: var(--text) !important;
  cursor: pointer;
}
.switch input { position: absolute; opacity: 0; }
.switch span {
  width: 36px; height: 20px;
  border-radius: 999px;
  background: var(--line);
  position: relative;
  flex: none;
  transition: background 0.15s;
}
.switch span::after {
  content: "";
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.15s;
}
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::after { transform: translateX(16px); }
.switch input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

.foot { margin: 8px 0 0; font-size: 0.75rem; color: var(--muted); }

/* Small screens */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 12px 16px 32px; }
  .top { padding: 16px 16px 4px; }
  .stage { height: 56vh; }
  .badge { display: none; }
}