:root {
  --bg-dim: #070b12;
  --bg-card: #111827;
  --bg-card-hover: #1f293d;
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.25);
  --accent-green: #4ade80;
  --accent-amber: #fbbf24;
  --accent-red: #f87171;
  --accent-purple: #c084fc;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: #1e293b;
  --border-focus: #38bdf8;
  --radius: 10px;
  --font: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.12), transparent), var(--bg-dim);
  color: var(--text-main);
  font-family: var(--font);
  line-height: 1.45;
  padding: 16px 12px 28px;
  min-height: 100vh;
  display: flex;
  justify-content: center;
}
.container { width: 100%; max-width: 960px; display: flex; flex-direction: column; gap: 12px; }

header { text-align: center; margin-bottom: 4px; }
header h1 { font-size: 1.45rem; font-weight: 700; letter-spacing: -0.02em; }
header p { color: var(--text-muted); font-size: 0.82rem; margin-top: 2px; }

.step-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.sub-card { margin-top: 12px; padding: 12px 14px; background: var(--bg-dim); }
.card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.sub-title { font-size: 0.86rem; margin-bottom: 8px; }

details.fold {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-dim);
  margin-top: 10px;
}
details.fold > summary {
  cursor: pointer;
  padding: 9px 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
details.fold > summary::-webkit-details-marker { display: none; }
details.fold > summary::after { content: "+"; color: var(--accent); font-weight: 700; }
details.fold[open] > summary::after { content: "–"; }
details.fold[open] > summary { color: var(--text-main); border-bottom: 1px solid var(--border); }
details.fold .fold-body { padding: 12px; }

.mode-selector {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}
@media (min-width: 720px) { .mode-selector { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1040px) { .mode-selector { grid-template-columns: repeat(6, 1fr); } }

.mode-btn {
  background: var(--bg-dim);
  border: 2px solid var(--border);
  color: var(--text-muted);
  padding: 9px 10px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.mode-btn:hover { border-color: #334155; color: var(--text-main); }
.mode-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  box-shadow: 0 0 12px var(--accent-glow);
}
.mode-btn.active.vocoder {
  border-color: var(--accent-purple);
  color: var(--accent-purple);
  background: rgba(192, 132, 252, 0.08);
}
.mode-btn.active.combo {
  border-color: var(--accent-green);
  color: var(--accent-green);
  background: rgba(74, 222, 128, 0.08);
}
.mode-btn.active.water {
  border-color: #38bdf8;
  color: #7dd3fc;
  background: rgba(56, 189, 248, 0.12);
}
.mode-btn.active.water-combo {
  border-color: #22d3ee;
  color: #67e8f9;
  background: rgba(34, 211, 238, 0.1);
}
.mode-btn .desc { font-size: 0.68rem; font-weight: 400; color: var(--text-muted); }

.filter-action-group {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  background: var(--bg-dim);
  padding: 4px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.filter-action-btn {
  flex: 1;
  padding: 8px;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  background: transparent;
  color: var(--text-muted);
  transition: all 0.2s;
  text-align: center;
}
.filter-action-btn.active.reject {
  background: var(--accent-red);
  color: #ffffff;
  box-shadow: 0 0 10px rgba(248, 113, 113, 0.3);
}
.filter-action-btn.active.pass {
  background: var(--accent);
  color: #090d16;
  box-shadow: 0 0 10px var(--accent-glow);
}

.status-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  background: var(--bg-dim);
}
.status-banner.warning {
  border-color: rgba(251, 191, 36, 0.4);
  background: rgba(251, 191, 36, 0.08);
  color: var(--accent-amber);
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}
.control-group { display: flex; flex-direction: column; gap: 4px; }
label { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; }
select, input[type="number"], input[type="range"] {
  background: var(--bg-dim);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 7px 10px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.84rem;
  outline: none;
}
select:focus, input[type="number"]:focus { border-color: var(--border-focus); }
.range-container { display: flex; align-items: center; gap: 8px; }
input[type="range"] { flex: 1; padding: 0; accent-color: var(--accent); cursor: pointer; }
.range-val { min-width: 32px; font-size: 0.78rem; color: var(--text-muted); text-align: right; }

.btn {
  background: var(--bg-card-hover);
  color: var(--text-main);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.84rem;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn:hover { background: #2e3e57; border-color: #475569; }
.btn-primary {
  background: var(--accent);
  color: #070b12;
  border: none;
  flex: 1;
  font-size: 0.95rem;
  padding: 11px 18px;
}
.btn-primary:hover { background: #7dd3fc; box-shadow: 0 0 14px var(--accent-glow); }
.btn-primary.active { background: var(--accent-red); color: #ffffff; }
.btn-bypass { min-width: 96px; background: var(--bg-dim); color: var(--text-muted); }
.btn-bypass.active {
  background: rgba(251, 191, 36, 0.15);
  color: var(--accent-amber);
  border-color: rgba(251, 191, 36, 0.45);
}
.btn-secondary { background: rgba(56, 189, 248, 0.1); color: var(--accent); border: 1px solid rgba(56, 189, 248, 0.3); }
.btn-purple { background: rgba(192, 132, 252, 0.12); color: var(--accent-purple); border: 1px solid rgba(192, 132, 252, 0.35); }
.btn-preset { font-size: 0.74rem; padding: 4px 8px; background: var(--bg-dim); }

.range-groups { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.range-group {
  background: var(--bg-dim);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
.range-group-header { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.range-group-header input[type="text"] {
  flex: 1; min-width: 0; background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-main); border-radius: 6px; padding: 4px 8px; font-size: 0.82rem; font-weight: 600;
}
.range-group-summary { font-size: 0.72rem; color: var(--text-muted); margin: 6px 0 0; }
.range-group-polarity { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--border); }
.range-group-polarity .pol-label { font-size: 0.72rem; font-weight: 600; color: var(--accent-purple); margin-bottom: 6px; }

.sub-panel {
  background: rgba(17, 24, 39, 0.95);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 8px;
}
.sub-panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.toggle-label { display: flex; align-items: center; gap: 6px; cursor: pointer; font-weight: 600; font-size: 0.8rem; }
.sub-status { font-size: 0.7rem; color: var(--text-muted); }
.combo-stats { font-size: 0.72rem; color: var(--accent-amber); font-weight: 600; margin-top: 4px; }

.preset-section-label {
  font-size: 0.74rem; font-weight: 600; color: var(--text-muted);
  margin: 8px 0 5px 0; text-transform: uppercase; letter-spacing: 0.05em;
}
.presets { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 8px; }

.bands-list {
  display: flex; flex-direction: column; gap: 5px; margin-bottom: 10px;
  max-height: 220px; overflow-y: auto; padding-right: 4px;
}
.bands-compact {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  flex-wrap: wrap; background: var(--bg-dim); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; margin-bottom: 10px;
}
.bands-compact .compact-meta { font-size: 0.8rem; color: var(--text-muted); line-height: 1.4; }
.bands-compact .compact-meta strong { color: var(--text-main); font-weight: 600; }
.band-row {
  display: flex; align-items: center; gap: 8px; background: var(--bg-dim);
  padding: 5px 8px; border-radius: 6px; border: 1px solid var(--border);
}
.band-row.inverted { border-color: var(--accent-purple); background: rgba(192, 132, 252, 0.05); }
.band-row .inputs { display: flex; align-items: center; gap: 6px; flex: 1; }
.band-row input[type="number"] { width: 85px; padding: 3px 6px; font-size: 0.8rem; }
.polarity-badge {
  font-size: 0.68rem; font-weight: 700; padding: 2px 5px; border-radius: 4px;
  background: var(--bg-card); color: var(--accent-green);
}
.polarity-badge.negative { background: rgba(192, 132, 252, 0.2); color: var(--accent-purple); }
.btn-icon { background: transparent; border: none; color: var(--text-muted); cursor: pointer; padding: 3px; border-radius: 4px; }
.btn-icon:hover { color: var(--accent-red); background: rgba(248, 113, 113, 0.1); }

.visualizers-wrapper { display: flex; flex-direction: column; gap: 10px; }
.canvas-container {
  position: relative; width: 100%; height: 140px; background: #05080f;
  border-radius: 8px; overflow: hidden; border: 1px solid var(--border);
}
canvas { width: 100%; height: 100%; display: block; }
.canvas-header { font-size: 0.74rem; font-weight: 600; margin-bottom: 2px; }
.axis-labels { display: flex; justify-content: space-between; font-size: 0.68rem; color: var(--text-muted); padding: 2px 4px 0 4px; }
.legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: 0.7rem; color: var(--text-muted); margin-top: 4px; justify-content: flex-end; }
.legend-item { display: flex; align-items: center; gap: 5px; }
.legend-color { width: 9px; height: 9px; border-radius: 2px; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(135px, 1fr)); gap: 8px; }
.stat-box { background: var(--bg-dim); padding: 7px 9px; border-radius: 6px; border: 1px solid var(--border); }
.stat-box .value { font-size: 0.88rem; font-weight: 700; color: var(--accent-green); }
.stat-box .label { font-size: 0.68rem; color: var(--text-muted); }
.status-indicator { font-size: 0.8rem; color: var(--accent); font-variant-numeric: tabular-nums; padding-top: 4px; }

.hidden { display: none !important; }
.highlight-card { border-color: var(--accent-purple) !important; box-shadow: 0 0 16px rgba(192, 132, 252, 0.12) !important; }
.transport-row { display: flex; gap: 10px; align-items: stretch; margin-top: 12px; flex-wrap: wrap; }
.transport-row .btn-primary { flex: 1; min-width: 180px; }
.qa-pass { color: var(--accent-green); font-weight: 600; }
.qa-fail { color: var(--accent-red); font-weight: 600; }