:root {
  --bg: #0f1420;
  --panel: #171d2c;
  --panel-border: #2a3348;
  --text: #e6e9f2;
  --text-dim: #9aa4bd;
  --accent: #5aa9ff;
  --accent-dim: #2c4670;
  --danger: #ff6b6b;
  --ok: #4ade80;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  padding: 14px 24px;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.topbar h1 { font-size: 1.25rem; margin: 0; }
.subtitle { color: var(--text-dim); font-size: 0.85rem; }
.topbar-user {
  margin-left: auto;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.topbar-user a { color: var(--accent); text-decoration: none; }
.topbar-user a:hover { text-decoration: underline; }
.topbar-user form { margin: 0; }
.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
}
.link-btn:hover { text-decoration: underline; }

.layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  padding: 16px;
  align-items: start;
}

.sidebar { display: flex; flex-direction: column; gap: 12px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 14px 16px;
}
.panel.disabled { opacity: 0.45; pointer-events: none; }

.panel h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 4px 0 10px;
}

.dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 90px;
  border: 2px dashed var(--panel-border);
  border-radius: 8px;
  padding: 12px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-dim);
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover { border-color: var(--accent); background: rgba(90,169,255,0.08); }

.info-box { margin-top: 12px; font-size: 0.82rem; display: grid; gap: 4px; color: var(--text-dim); }
.info-box b { color: var(--text); }
.hidden { display: none !important; }

.error {
  margin-top: 10px;
  padding: 8px 10px;
  background: rgba(255,107,107,0.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 6px;
  font-size: 0.8rem;
}

.channel-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 10px;
  margin-bottom: 4px;
  font-size: 0.8rem;
}
.channel-list label { display: flex; align-items: center; gap: 4px; cursor: pointer; }
.sat-badge {
  margin-left: auto;
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--panel-border);
  color: var(--text-dim);
  line-height: 1.4;
  white-space: nowrap;
}
#focus-sat-badge { margin-left: 4px; }
.sat-badge.ok { background: rgba(74,222,128,0.15); color: var(--ok); }
.sat-badge.warn { background: rgba(250,204,21,0.15); color: #facc15; }
.sat-badge.bad { background: rgba(255,107,107,0.15); color: var(--danger); }

.filter-group {
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  margin: 10px 0;
  padding: 8px 10px 10px;
}
.filter-group legend { padding: 0 4px; font-size: 0.85rem; }
.filter-group legend label { display: flex; align-items: center; gap: 6px; cursor: pointer; }

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin: 6px 0;
}
.row input[type="number"], .row input[type="text"], .row select {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 5px;
  padding: 4px 6px;
  width: 100px;
  font-size: 0.8rem;
}
.row input[type="range"] { flex: 1; margin-left: 8px; }
#upload-name, #upload-participant { flex: 1; width: auto; }
.eyes-test-row { justify-content: flex-start; gap: 8px; cursor: pointer; }
.eyes-test-row input[type="checkbox"] { flex: 0 0 auto; }

.hint { font-size: 0.72rem; color: var(--text-dim); margin-top: 6px; line-height: 1.4; }

.formula-box { margin-top: 8px; }
.formula-box summary {
  cursor: pointer;
  font-size: 0.72rem;
  color: var(--accent);
  user-select: none;
}
.formula-box summary:hover { text-decoration: underline; }
.formula {
  margin-top: 8px;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  font-size: 0.74rem;
  color: var(--text-dim);
  line-height: 1.5;
  overflow-x: auto;
}
.formula p { margin: 6px 0; }
.formula p.tex { color: var(--text); overflow-x: auto; }
.formula .katex { font-size: 0.95em; }

.actions { display: flex; gap: 8px; margin-top: 14px; }
.btn {
  flex: 1;
  padding: 9px 10px;
  border-radius: 7px;
  border: 1px solid var(--panel-border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  font-size: 0.82rem;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent-dim); border-color: var(--accent); color: #fff; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.small { flex: 0 0 auto; padding: 5px 10px; font-size: 0.85rem; }

.plot-area {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  height: 88vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.plot-toolbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--panel-border);
}
.view-toggle { display: flex; gap: 4px; background: var(--bg); padding: 3px; border-radius: 8px; }
.mode-btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.78rem;
}
.mode-btn.active { background: var(--accent-dim); color: #fff; }

.focus-nav { display: flex; align-items: center; gap: 6px; }
.focus-nav select {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 0.85rem;
}

.legend { display: flex; gap: 14px; margin-left: auto; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 5px; font-size: 0.74rem; color: var(--text-dim); }
.swatch { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }
.swatch.raw { background: #5a6480; }
.swatch.filtered { background: var(--accent); }
.swatch.sat { background: var(--danger); height: 8px; width: 3px; }
.swatch.excluded { background: repeating-linear-gradient(45deg, #6b7280, #6b7280 2px, transparent 2px, transparent 4px); width: 14px; height: 10px; border-radius: 2px; }
.swatch.marker { background: none; border-top: 2px dotted var(--ok); height: 0; width: 14px; }
.swatch.band-theta { background: #a78bfa; }
.swatch.band-alpha { background: #38bdf8; }
.swatch.band-beta { background: #fbbf24; }
.swatch.band-gamma { background: #fb7185; }

.quality-banner {
  flex: 0 0 auto;
  margin: 0 14px;
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(255,107,107,0.1);
  border: 1px solid rgba(255,107,107,0.35);
  color: #ffb3b3;
  font-size: 0.78rem;
  line-height: 1.5;
}
.quality-banner:empty, .quality-banner.hidden { display: none; }
.quality-banner b { color: #fff; }

.plot-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
}
.plot { width: 100%; }
.focus-plot { width: 100%; height: 100%; min-height: 70vh; }
.bands-compare-wrap {
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--panel-border);
}
.bands-compare-wrap.hidden { display: none; }
.bands-compare-wrap h3 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dim);
  margin: 0 0 6px;
}
.bands-compare-plot { width: 100%; height: 340px; }
.compare-signal-plot { width: 100%; height: 380px; }

.tests-list {
  max-height: 220px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 8px 0;
}
.test-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  padding: 5px 6px;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--panel-border);
}
.test-item label { display: flex; align-items: center; gap: 6px; flex: 1; min-width: 0; cursor: pointer; }
.test-item .test-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.test-item .eye-badge { flex: 0 0 auto; font-size: 0.75rem; opacity: 0.85; }
.test-item .test-meta { color: var(--text-dim); font-size: 0.68rem; flex: 0 0 auto; }
.test-item .test-delete {
  flex: 0 0 auto;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0 2px;
}
.test-item .test-delete:hover { color: var(--danger); }
.tests-list:empty::before {
  content: "Nenhum teste cadastrado ainda.";
  color: var(--text-dim);
  font-size: 0.75rem;
}
.timeline-wrap {
  flex: 0 0 auto;
  border-top: 1px solid var(--panel-border);
  padding: 4px 8px 0;
}
.timeline { width: 100%; height: 130px; }
.placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}