:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2a2d3a;
  --text: #e0e0e6;
  --text-dim: #8888a0;
  --accent: #5b8def;
  --green: #4ec88c;
  --yellow: #e8b84a;
  --red: #e85454;
  --orange: #e8944a;
  --font: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.subtitle {
  color: var(--text-dim);
  font-size: 0.85rem;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 4rem;
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-dim);
  font-size: 0.75rem;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

.hidden { display: none !important; }

/* Results header */
.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0;
  gap: 1rem;
}

.results-actions {
  display: flex;
  gap: 0.5rem;
}

/* View tabs */
.view-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.view-tab {
  padding: 0.6rem 1.2rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.85rem;
  transition: all 0.15s;
}

.view-tab:hover { color: var(--text); }
.view-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.view-content { display: none; }
.view-content.active { display: block; }

/* Drop zone */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 4rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(91, 141, 239, 0.05);
}

.drop-icon { font-size: 3rem; margin-bottom: 1rem; }

.drop-zone code {
  background: var(--surface);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

.hint { color: var(--text-dim); font-size: 0.8rem; margin-top: 0.5rem; }

.drop-zone input[type="file"] {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
}

/* Loading */
.loading {
  text-align: center;
  padding: 4rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 1rem;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Session tabs */
.session-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.session-tab {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.85rem;
  white-space: nowrap;
  transition: all 0.15s;
}

.session-tab:hover { border-color: var(--accent); color: var(--text); }
.session-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.panel h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

/* Summary grid */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

.summary-card {
  background: var(--bg);
  border-radius: 8px;
  padding: 1rem;
  min-width: 0;
  overflow: hidden;
}

.summary-card .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}

.summary-card .value {
  font-size: 1.3rem;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Timeseries controls */
.ts-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.ts-tabs {
  display: flex;
  gap: 0.25rem;
}

.ts-tab {
  padding: 0.35rem 0.75rem;
  border-radius: 5px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.75rem;
  transition: all 0.15s;
}

.ts-tab:hover { border-color: var(--accent); color: var(--text); }
.ts-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.ts-reset-zoom {
  padding: 0.35rem 0.75rem;
  border-radius: 5px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.75rem;
  transition: all 0.15s;
}

.ts-reset-zoom:hover { border-color: var(--accent); color: var(--text); }

/* PID axis toggle */
.pid-axis-toggle {
  display: flex;
  gap: 0;
  margin-bottom: 0.75rem;
}

.pid-axis-btn {
  padding: 0.3rem 0.7rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.7rem;
  transition: all 0.15s;
}

.pid-axis-btn:first-child {
  border-radius: 4px 0 0 4px;
}

.pid-axis-btn:last-child {
  border-radius: 0 4px 4px 0;
}

.pid-axis-btn:not(:first-child) {
  border-left: none;
}

.pid-axis-btn:hover { color: var(--text); border-color: var(--accent); }
.pid-axis-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.ts-chart-row {
  margin-bottom: 0.25rem;
}

.ts-chart-row h3 {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 0.25rem;
}

/* Event markers */
.ts-event-line {
  position: absolute;
  width: 1px;
  background: var(--red);
  opacity: 0.5;
  pointer-events: none;
}

/* Diagnostics */
.diagnostic {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  border-left: 3px solid;
}

.diagnostic.Problem { border-color: var(--red); background: rgba(232, 84, 84, 0.08); }
.diagnostic.Warning { border-color: var(--yellow); background: rgba(232, 184, 74, 0.08); }
.diagnostic.Info { border-color: var(--accent); background: rgba(91, 141, 239, 0.08); }

.diagnostic .diag-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.25rem;
}

.diagnostic .severity {
  font-size: 0.7rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.diagnostic.Problem .severity { color: var(--red); }
.diagnostic.Warning .severity { color: var(--yellow); }
.diagnostic.Info .severity { color: var(--accent); }

.diagnostic .category {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.diagnostic .message { font-size: 0.85rem; font-weight: 600; }
.diagnostic .detail { font-size: 0.8rem; color: var(--text-dim); margin-top: 0.25rem; }

.diag-show-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--accent);
  font-family: var(--font);
  font-size: 0.65rem;
  padding: 0.15rem 0.5rem;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.15s;
  margin-left: auto;
}
.diag-show-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Spectrum plots */
.spectrum-row {
  margin-bottom: 1.5rem;
}

.spectrum-row h3 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dim);
}

.peaks-list {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.peak-badge {
  background: var(--bg);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
}

.peak-badge .freq { font-weight: 700; color: var(--accent); }
.peak-badge .class { color: var(--orange); margin-left: 0.3rem; }

/* Spectrogram */
.spectrogram-row {
  margin-bottom: 1.5rem;
}

.spectrogram-row h3 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dim);
}

.spectrogram-row canvas {
  width: 100%;
  border-radius: 4px;
}

.spectrogram-legend {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

/* Throttle bands */
.throttle-band {
  margin-bottom: 1.5rem;
}

.throttle-band h3 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.band-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

/* Accel */
.accel-rms {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.rms-card {
  background: var(--bg);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  flex: 1;
  text-align: center;
}

.rms-card .axis { font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; }
.rms-card .rms-value { font-size: 1.2rem; font-weight: 700; }

/* Events */
.event-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.event-table th {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.event-table td {
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid rgba(42, 45, 58, 0.5);
}

.event-type {
  font-weight: 600;
  white-space: nowrap;
}

.event-type.ThrottleChop { color: var(--red); }
.event-type.ThrottlePunch { color: var(--green); }
.event-type.MotorSaturation { color: var(--yellow); }
.event-type.GyroSpike { color: var(--orange); }
.event-type.Overshoot { color: var(--accent); }
.event-type.Desync { color: var(--red); }
.event-type.FirmwareMessage { color: var(--yellow); }

/* Event filter pills */
.event-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.event-pill {
  padding: 0.3rem 0.6rem;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.7rem;
  transition: all 0.15s;
  opacity: 0.5;
}

.event-pill.active { opacity: 1; }
.event-pill.active.ThrottleChop,
.event-pill.active.Desync { border-color: var(--red); color: var(--red); }
.event-pill.active.ThrottlePunch { border-color: var(--green); color: var(--green); }
.event-pill.active.MotorSaturation { border-color: var(--yellow); color: var(--yellow); }
.event-pill.active.GyroSpike { border-color: var(--orange); color: var(--orange); }
.event-pill.active.Overshoot { border-color: var(--accent); color: var(--accent); }
.event-pill.active.FirmwareMessage { border-color: var(--yellow); color: var(--yellow); }

/* Clickable event rows */
.event-row { cursor: pointer; transition: background 0.1s; }
.event-row:hover td { background: rgba(91, 141, 239, 0.1); }

.events-truncated {
  color: var(--text-dim);
  font-size: 0.8rem;
  margin-top: 0.75rem;
  font-style: italic;
}

/* Buttons */
.reset-btn {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.8rem;
  white-space: nowrap;
  transition: all 0.15s;
}

.reset-btn:hover { border-color: var(--accent); color: var(--text); }

/* Chart sizing */
.u-wrap { margin: 0 auto; }

/* Raw data table */
.raw-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.raw-select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.75rem;
  padding: 0.25rem;
  min-width: 200px;
  max-height: 100px;
}

.raw-table-wrap {
  max-height: 400px;
  overflow: auto;
  border-radius: 4px;
}

.raw-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
}

.raw-table th {
  position: sticky;
  top: 0;
  background: var(--surface);
  text-align: right;
  padding: 0.3rem 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.65rem;
  white-space: nowrap;
}

.raw-table th:first-child { text-align: left; }

.raw-table td {
  padding: 0.2rem 0.5rem;
  text-align: right;
  border-bottom: 1px solid rgba(42, 45, 58, 0.3);
  white-space: nowrap;
}

.raw-table td:first-child { text-align: left; color: var(--text-dim); }

.raw-table tr:hover td { background: rgba(91, 141, 239, 0.05); }

/* Tuning suggestions */
.tuning-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.tuning-table th {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tuning-table td {
  padding: 0.5rem;
  border-bottom: 1px solid rgba(42, 45, 58, 0.5);
}

.tuning-table .gain-cell {
  font-family: var(--mono);
  white-space: nowrap;
}

.tuning-table .gain-arrow {
  color: var(--text-dim);
  margin: 0 0.15rem;
}

.tuning-table strong {
  color: var(--green);
}

/* Step overlay */
.step-overlay-row {
  margin-bottom: 1.5rem;
}

.step-overlay-row h3 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

/* Comparison */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.compare-table th {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.compare-table td {
  padding: 0.5rem;
  border-bottom: 1px solid rgba(42, 45, 58, 0.5);
}

.compare-table .delta { font-weight: 700; font-size: 0.8rem; }
.delta.better { color: var(--green); }
.delta.worse { color: var(--red); }
.delta.neutral { color: var(--text-dim); }

.compare-pickers {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.compare-pickers label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex: 1;
  min-width: 200px;
}

.compare-vs {
  color: var(--text-dim);
  font-size: 0.85rem;
  padding-top: 1.2rem;
}

.diag-diff-section { margin-bottom: 1rem; }

.diag-diff-section h3 {
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.diag-diff-section h3.fixed { color: var(--green); }
.diag-diff-section h3.new-issue { color: var(--red); }
.diag-diff-section h3.unchanged { color: var(--text-dim); }

/* Responsive — tablet */
@media (max-width: 768px) {
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .summary-card .value { font-size: 1.1rem; }

  .results-header { flex-direction: column; align-items: stretch; }
  .session-tabs { justify-content: center; }
  .results-actions { justify-content: center; }

  /* View tabs: horizontal scroll */
  .view-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .view-tabs::-webkit-scrollbar { display: none; }
  .view-tab { white-space: nowrap; flex-shrink: 0; }

  /* Timeline controls: stack on tablet */
  .ts-controls { flex-direction: column; align-items: stretch; }
  .ts-tabs { flex-wrap: wrap; }
  .ts-reset-zoom { align-self: flex-end; }

  /* Tables: horizontal scroll */
  .tuning-table, .compare-table, .event-table, .raw-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Compare pickers: stack vertically */
  .compare-pickers { flex-direction: column; }
  .compare-vs { display: none; }

  /* Session selector: full width */
  .session-select { min-width: 0; width: 100%; }
}

/* Responsive — phone */
@media (max-width: 640px) {
  header { padding: 1.5rem 0.5rem 0.75rem; }
  header h1 { font-size: 1.4rem; }
  main { padding: 0 0.5rem 3rem; }

  .drop-zone { padding: 2.5rem 1rem; }
  .drop-icon { font-size: 2rem; }

  .summary-grid { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }

  .panel { padding: 0.75rem; }

  /* Larger tap targets on touch */
  .view-tab { padding: 0.7rem 0.8rem; font-size: 0.75rem; }
  .ts-tab, .ts-reset-zoom { padding: 0.5rem 0.6rem; min-height: 36px; font-size: 0.75rem; }
  .pid-axis-btn { padding: 0.4rem 0.8rem; min-height: 36px; font-size: 0.75rem; }
  .session-tab { padding: 0.6rem 1rem; }
  .reset-btn { padding: 0.6rem 1rem; text-align: center; }

  .accel-rms { flex-direction: column; }

  /* Tables: horizontal scroll wrapper + readable fonts */
  .event-table { font-size: 0.8rem; }
  .event-table th { font-size: 0.7rem; }
  .event-table th, .event-table td { padding: 0.4rem 0.5rem; white-space: nowrap; }

  .compare-table { font-size: 0.8rem; }
  .compare-table th, .compare-table td { padding: 0.4rem; }

  .tuning-table { font-size: 0.8rem; }
  .tuning-table th, .tuning-table td { padding: 0.4rem; }

  .raw-select { min-width: 0; width: 100%; }
  .raw-table { font-size: 0.7rem; }

  /* Diagnostic cards */
  .diagnostic .message { font-size: 0.8rem; }
  .diagnostic .detail { font-size: 0.75rem; }

  /* Peaks wrap tighter */
  .peaks-list { gap: 0.4rem; }
  .peak-badge { font-size: 0.7rem; padding: 0.25rem 0.4rem; }

  /* Step overlay */
  .step-overlay-row h3 { font-size: 0.8rem; }

  /* Motor balance */
  .motor-balance-section h3 { font-size: 0.85rem; }
  .motor-bar-label { font-size: 0.75rem; }

  /* Propwash */
  .propwash-summary { font-size: 0.8rem; }

  /* Spectrogram legend */
  .spectrogram-legend { font-size: 0.7rem; }
}

/* Session selector dropdown */
.session-select {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 0.85rem;
  font-family: inherit;
  min-width: 200px;
}
.session-select optgroup {
  color: var(--text-dim);
  font-style: normal;
}

/* Health verdict banner */
.health-verdict {
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.health-verdict.verdict-green {
  background: rgba(78, 200, 140, 0.12);
  border: 1px solid var(--green);
  color: var(--green);
}

.health-verdict.verdict-yellow {
  background: rgba(232, 184, 74, 0.12);
  border: 1px solid var(--yellow);
  color: var(--yellow);
}

.health-verdict.verdict-red {
  background: rgba(232, 84, 84, 0.12);
  border: 1px solid var(--red);
  color: var(--red);
}

/* Summary metadata line */
.summary-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.summary-meta span {
  margin-right: 1rem;
}

.summary-meta .meta-label {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.65rem;
  margin-right: 0.25rem;
}

/* Tuning all-good line */
.tuning-good {
  color: var(--green);
  font-weight: 600;
  font-size: 0.85rem;
}

/* Warning summary cards */
.summary-warn {
  border-color: var(--red) !important;
}
.summary-warn .value {
  color: var(--red);
}

/* Propwash analysis */
.propwash-summary {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin: 0 0 0.75rem;
}
.propwash-summary strong {
  color: var(--text);
}

/* Motor balance bars */
.motor-balance-section {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.motor-balance-section h3 {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: normal;
}
.motor-bar-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}
.motor-bar-label {
  width: 4.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  flex-shrink: 0;
}
.motor-bar-track {
  flex: 1;
  height: 1rem;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.motor-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s;
}
.motor-bar-value {
  width: 3.5rem;
  font-size: 0.8rem;
  text-align: right;
  flex-shrink: 0;
}

/* Ensure tables scroll horizontally on narrow screens */
.event-table, .compare-table {
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.event-table thead, .event-table tbody,
.compare-table thead, .compare-table tbody {
  display: table;
  width: 100%;
}