/* Signal Lab and electrode map */
.lab { display: flex; flex-direction: column; gap: 14px; }
.lab-controls, .lab-filters { display: flex; flex-wrap: wrap; gap: 12px 16px; padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.lab-filters { background: var(--surface-2); }
.ctl { display: flex; flex-direction: column; gap: 4px; min-width: 120px; }
.ctl-wide { flex: 1 1 320px; }
.ctl label, .inline-ctls label, .panel-head label { font-size: .78rem; font-weight: 600; color: var(--muted); }
.lab select, .lab input[type=file], .btn {
  font: inherit; font-size: .88rem; color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 7px; padding: 6px 8px;
}
.btn { cursor: pointer; padding: 8px 14px; font-weight: 600; background: var(--accent); color: #fff; border-color: transparent; }
.btn:hover { filter: brightness(1.08); }
.hint { margin: 2px 0 0; font-size: .8rem; color: var(--muted); }
.meta { margin: 0; font: .8rem var(--mono); color: var(--ink-2); }
.lab-note { margin: 0; padding: 8px 12px; font-size: .86rem; border-radius: 8px; background: color-mix(in srgb, var(--warning) 10%, var(--surface)); border: 1px solid color-mix(in srgb, var(--warning) 35%, var(--line)); }
.lab-note:empty { display: none; }
.lab-traces { padding: 10px 12px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--surface-solid); }
.lab-traces canvas { display: block; width: 100%; cursor: pointer; }
.scrub { display: flex; align-items: center; gap: 10px; margin-top: 6px; font-size: .84rem; }
.scrub input { flex: 1; accent-color: var(--accent); }
.scrub label { font-size: .78rem; font-weight: 600; color: var(--muted); }
.lab-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 14px; }
.panel { padding: 14px 16px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--surface-solid); }
.panel h2 { margin: 0; font-family: var(--serif); font-size: 1.15rem; font-weight: 650; }
.panel-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 10px; }
.inline-ctls { display: flex; flex-wrap: wrap; gap: 10px; }
.inline-ctls label, .panel-head label { display: flex; align-items: center; gap: 6px; text-transform: none; letter-spacing: 0; font-size: .8rem; }
.panel canvas { display: block; width: 100%; }
.panel-head-map svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }
.bands { overflow-x: auto; }
.bands table { width: 100%; border-collapse: collapse; font-size: .82rem; font-variant-numeric: tabular-nums; }
.bands th { text-align: left; font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--line); text-transform: capitalize; }
.bands td { padding: 4px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.bands tr[data-ch] { cursor: pointer; }
.bands tr[data-ch]:hover td { background: var(--surface-2); }
.bands tr.sel td { background: color-mix(in srgb, var(--accent) 12%, var(--surface)); }
.bar { display: inline-block; vertical-align: middle; width: 46px; height: 7px; margin-right: 6px; border-radius: 4px; background: linear-gradient(90deg, var(--c) var(--w), var(--surface-2) var(--w)); }
.status { text-align: right; }
.lab-exercises { max-width: var(--measure); }
.electrode:focus { outline: none; }
.electrode:focus circle { stroke: var(--accent); stroke-width: .04; }

.map-layout { display: grid; grid-template-columns: minmax(0, 440px) minmax(0, 1fr); gap: 20px; align-items: start; }
.map-layout > svg { width: 100%; height: auto; }
.map-side { display: flex; flex-direction: column; gap: 14px; }
#map-info h3 { margin: 0 0 4px; font-family: var(--serif); font-size: 1.6rem; }
#map-info p { margin: 4px 0; }
.quiz-prompt { font-size: 1.2rem; font-weight: 600; min-height: 1.6em; margin: 10px 0 0; }

@media (max-width: 900px) {
  .lab-grid, .map-layout { grid-template-columns: minmax(0, 1fr); }
  .ctl { min-width: calc(50% - 8px); flex: 1 1 calc(50% - 8px); }
}