:root {
  --bg: #12151c;
  --panel: #1a1f2a;
  --panel-2: #202634;
  --grid: #2a2f3a;
  --text: #e7ebf2;
  --muted: #8a93a6;
  --accent: #4dabf7;
  --accent-2: #51cf66;
  --danger: #ff6b6b;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.topbar { padding: 18px 20px; border-bottom: 1px solid var(--grid); }
.brand { display: flex; align-items: center; gap: 14px; max-width: 760px; margin: 0 auto; }
.logo { font-size: 30px; }
h1 { font-size: 20px; margin: 0; }
.tag { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 18px 16px 40px; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; }
.foot a { color: var(--accent); text-decoration: none; }

/* stepper */
.stepper { display: flex; gap: 6px; list-style: none; padding: 0; margin: 0 0 18px; }
.stepper li {
  flex: 1; text-align: center; font-size: 12px; color: var(--muted);
  padding: 8px 4px; border-radius: 10px; background: var(--panel);
  border: 1px solid var(--grid); position: relative;
}
.stepper li::before {
  content: attr(data-n); display: inline-flex; width: 18px; height: 18px; margin-right: 6px;
  align-items: center; justify-content: center; border-radius: 50%;
  background: var(--panel-2); font-size: 11px; vertical-align: middle;
}
.stepper li.active { color: var(--text); border-color: var(--accent); }
.stepper li.active::before { background: var(--accent); color: #06121f; }

/* cards */
.card {
  background: var(--panel); border: 1px solid var(--grid); border-radius: var(--radius);
  padding: 18px; margin-bottom: 14px;
}
.card h2 { margin: 0 0 10px; font-size: 17px; }
.card h3 { margin: 0 0 10px; font-size: 15px; }
.hint { color: var(--muted); font-size: 13px; margin: 6px 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

/* segmented + buttons */
.seg { display: flex; gap: 8px; }
.seg-btn {
  flex: 1; padding: 12px; border-radius: 10px; border: 1px solid var(--grid);
  background: var(--panel-2); color: var(--text); cursor: pointer; font-size: 14px;
}
.seg-btn.on { border-color: var(--accent); background: #14324a; }

.btn {
  border: 1px solid var(--grid); background: var(--panel-2); color: var(--text);
  padding: 11px 16px; border-radius: 10px; cursor: pointer; font-size: 14px;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); color: #06121f; border-color: var(--accent); font-weight: 600; }
.btn.primary:disabled { opacity: .5; cursor: not-allowed; }
.btn.ghost { background: transparent; }
.actions { display: flex; justify-content: space-between; gap: 10px; margin-top: 12px; }
.actions .primary { margin-left: auto; }

.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.in { background: var(--panel-2); border: 1px solid var(--grid); color: var(--text); padding: 9px 10px; border-radius: 8px; }
.in.tiny { width: 64px; }
.addband { margin-top: 12px; }

/* band + target lists */
.bands { list-style: none; padding: 0; margin: 10px 0 0; }
.bands li { display: flex; align-items: center; gap: 10px; padding: 8px 10px; background: var(--panel-2); border-radius: 8px; margin-bottom: 6px; }
.band-name { font-weight: 600; }
.band-range { color: var(--muted); font-size: 12px; margin-left: auto; }
.x { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 14px; }
.x:hover { color: var(--danger); }

.targets { display: grid; gap: 8px; }
.target { display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; align-items: start; padding: 10px 12px; border: 1px solid var(--grid); border-radius: 10px; cursor: pointer; }
.target.on { border-color: var(--accent); background: #14324a55; }
.target input { grid-row: span 2; margin-top: 3px; }
.target-title { font-weight: 600; }
.target-desc { grid-column: 2; color: var(--muted); font-size: 12px; }

.warn { color: var(--danger); font-size: 13px; margin: 6px 0 12px; }
.in.wide { flex: 1; min-width: 180px; }
.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px;
  word-break: break-all; color: var(--accent); user-select: all;
  background: var(--panel-2); padding: 8px 10px; border-radius: 8px;
}

.steps { margin: 6px 0 12px; padding-left: 20px; }
.steps li { margin: 4px 0; }
.status { min-height: 20px; color: var(--muted); font-size: 13px; }

.meter { height: 8px; background: var(--panel-2); border-radius: 6px; overflow: hidden; margin: 10px 0; }
.meter-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent-2), var(--danger)); transition: width .05s linear; }

.detected { list-style: none; padding: 0; margin: 0; }
.detected li { display: flex; justify-content: space-between; gap: 10px; padding: 8px 10px; border-radius: 8px; margin-bottom: 6px; background: var(--panel-2); }
.detected li.ok { border-left: 3px solid var(--accent-2); }
.detected li.cur { border-left: 3px solid var(--accent); }

/* results */
.settings { list-style: none; padding: 0; margin: 8px 0 0; }
.settings li { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; align-items: center; padding: 10px 12px; background: var(--panel-2); border-radius: 10px; margin-bottom: 8px; }
.setting { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.setting.pos { color: var(--accent-2); }
.setting.neg { color: var(--danger); }
.settings .muted { grid-column: 1 / -1; }

.chart { width: 100%; height: 300px; display: block; }
.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 10px; font-size: 12px; color: var(--muted); }
.leg { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 16px; height: 3px; border-radius: 2px; display: inline-block; }
.swatch.dash { background-image: none !important; opacity: .8; }

@media (max-width: 520px) {
  .stepper li { font-size: 11px; }
  .stepper li::before { display: none; }
}