/* ErrPresso -- design tokens and shared component styles, matching the
   approved design canvas (cytofeather-inspired: light, minimal, sidebar
   + canvas layout, IBM Plex type). */

:root {
  --bg: oklch(98.4% 0.003 95);
  --surface: oklch(100% 0 0);
  --sidebar: oklch(99% 0.002 95);
  --border: oklch(90% 0.005 95);
  --border-soft: oklch(93% 0.004 95);
  --text: oklch(23% 0.006 95);
  --text-muted: oklch(50% 0.008 95);
  --text-faint: oklch(65% 0.006 95);
  --accent: oklch(54% 0.13 260);
  --accent-hover: oklch(46% 0.13 260);
  --accent-soft: oklch(95% 0.025 260);
  --accent-line: oklch(80% 0.06 260);
  --teal: oklch(58% 0.11 190);
  --teal-soft: oklch(94% 0.035 190);
  --teal-line: oklch(78% 0.07 190);
  --danger: oklch(55% 0.16 25);
  --danger-soft: oklch(95% 0.03 25);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

button {
  font-family: inherit;
}

.mono {
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
}

.label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  background: none;
  color: var(--text);
  white-space: nowrap;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}
.btn-ghost {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}
.btn-ghost:hover:not(:disabled) {
  border-color: var(--text-faint);
}
.btn-sm {
  padding: 7px 13px;
  font-size: 12.5px;
}

/* ---- Fields (number steppers) ---- */

.field {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 9px 11px;
  background: var(--surface);
}
.field-label {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-bottom: 3px;
}
.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}
.field-value {
  font-size: 15px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  border: none;
  background: transparent;
  width: 100%;
  color: var(--text);
  padding: 0;
}
.field-value:focus {
  outline: none;
}
.field-steps {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}
.step {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  background: var(--surface);
  user-select: none;
}
.step:hover {
  border-color: var(--text-faint);
  color: var(--text);
}

.constraints-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

/* ---- Toggle switch ---- */

.toggle-row {
  position: relative; /* anchors the info-badge tooltip below, at the row's full width */
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
}
.toggle-row span {
  font-size: 13px;
  color: var(--text);
}
.info-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 999px;
  background: var(--border-soft);
  color: var(--text-faint);
  font-size: 10px;
  font-weight: 700;
  font-style: italic;
  font-family: Georgia, "Times New Roman", serif;
  cursor: help;
  flex-shrink: 0;
}
.info-badge:hover,
.info-badge:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}
/* Custom tooltip instead of the native title attribute -- shows
   instantly and reliably on hover/focus, unlike the browser's own
   (slow, easy to miss, inconsistent across browsers). Positioned
   relative to the whole .toggle-row, not the tiny badge itself, so it
   spans the sidebar's width instead of overflowing past its edge. */
.info-badge::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(100% + 8px);
  background: var(--text);
  color: var(--surface);
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 11.5px;
  font-weight: 500;
  font-style: normal;
  line-height: 1.4;
  padding: 8px 10px;
  border-radius: 8px;
  box-shadow: 0 4px 16px oklch(0% 0 0 / 0.15);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 0.12s ease, transform 0.12s ease;
  z-index: 20;
}
.info-badge:hover::after,
.info-badge:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.toggle {
  width: 34px;
  height: 19px;
  border-radius: 999px;
  background: var(--border);
  flex-shrink: 0;
  position: relative;
  transition: background 0.15s ease;
  border: none;
  padding: 0;
  cursor: pointer;
}
.toggle.on {
  background: var(--accent);
}
.toggle .knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 15px;
  height: 15px;
  border-radius: 999px;
  background: var(--surface);
  box-shadow: 0 1px 2px oklch(0% 0 0 / 0.15);
  transition: left 0.15s ease;
}
.toggle.on .knob {
  left: 17px;
}

/* ---- Sliders (native range, styled) ---- */

.slider-shell {
  position: relative;
  height: 20px;
  display: flex;
  align-items: center;
}
.slider-shell input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  position: absolute;
  left: 0;
  right: 0;
  width: 100%;
  height: 20px;
  background: transparent;
  margin: 0;
  pointer-events: none;
}
.slider-shell input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  background: transparent;
}
.slider-shell input[type="range"]::-moz-range-track {
  height: 6px;
  background: transparent;
}
.slider-shell input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  pointer-events: auto;
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 2px solid var(--accent);
  margin-top: -5px;
  cursor: grab;
}
.slider-shell input[type="range"]::-moz-range-thumb {
  pointer-events: auto;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--surface);
  border: 2px solid var(--accent);
  cursor: grab;
}
.slider-track {
  position: absolute;
  left: 0;
  right: 0;
  height: 6px;
  border-radius: 999px;
  background: var(--border-soft);
  pointer-events: none;
}
.slider-fill {
  position: absolute;
  height: 6px;
  border-radius: 999px;
  background: var(--accent-line);
  pointer-events: none;
}

/* ---- Layout shell ---- */

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand span {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.chip {
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.chip-row {
  display: flex;
  gap: 6px;
}

.workspace {
  display: flex;
  flex: 1;
  min-height: 0;
}

.sidebar {
  width: 300px;
  flex-shrink: 0;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow-y: auto;
}

.main-content {
  flex: 1;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  overflow-y: auto;
  min-width: 0;
}

/* ---- Mode nav ---- */

.mode-nav {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.mode-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 9px;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: none;
  text-align: left;
  font-family: inherit;
  width: 100%;
}
.mode-item:hover {
  background: var(--border-soft);
}
.mode-item.active {
  background: var(--accent-soft);
  color: var(--accent);
}
.mode-item span {
  font-size: 13.5px;
  font-weight: 500;
}
.mode-item.active span {
  font-weight: 600;
}
.mode-item svg {
  flex-shrink: 0;
}

/* ---- Cards / panels ---- */

.panel {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  box-shadow: 0 4px 16px oklch(0% 0 0 / 0.06), 0 1px 2px oklch(0% 0 0 / 0.04);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 18px 20px;
  box-shadow: 0 4px 16px oklch(0% 0 0 / 0.06), 0 1px 2px oklch(0% 0 0 / 0.04);
}
.stat-value {
  font-size: 30px;
  font-weight: 700;
  margin-top: 6px;
  letter-spacing: -0.01em;
}
.stat-value.teal {
  color: var(--teal);
}

/* ---- Table ---- */

.data-table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: auto;
}
table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}
table.data-table th {
  text-align: left;
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  white-space: nowrap;
  position: sticky;
  top: 0;
}
table.data-table th.num,
table.data-table td.num {
  text-align: right;
}
table.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
  white-space: nowrap;
}
table.data-table tbody tr:last-child td {
  border-bottom: none;
}
table.data-table td.seq {
  font-family: "IBM Plex Mono", monospace;
}
table.data-table td.cumulative {
  color: var(--teal);
  font-weight: 600;
}

/* ---- Tabs (input source) ---- */

.tab-row {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--bg);
  border-radius: 10px;
  width: fit-content;
}
.tab-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: 7px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}
.tab-item.active {
  background: var(--surface);
  box-shadow: 0 1px 2px oklch(0% 0 0 / 0.06);
  font-weight: 600;
  color: var(--text);
}

textarea.seq-input {
  width: 100%;
  min-height: 160px;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 16px 18px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text);
  resize: vertical;
}
textarea.seq-input::placeholder {
  color: var(--text-faint);
}

.warning-box {
  background: var(--danger-soft);
  border: 1px solid oklch(85% 0.06 25);
  color: oklch(38% 0.14 25);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13.5px;
  line-height: 1.5;
}

.caption {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

.disclaimer {
  font-size: 12px;
  color: var(--text-faint);
  line-height: 1.6;
  padding: 4px 2px 8px;
}

details.guide-details {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 14px 18px;
  box-shadow: 0 4px 16px oklch(0% 0 0 / 0.06), 0 1px 2px oklch(0% 0 0 / 0.04);
}
details.guide-details summary {
  cursor: pointer;
  font-size: 13.5px;
  color: var(--text-muted);
  font-weight: 500;
}
details.guide-details .data-table-wrap {
  margin-top: 14px;
  border: none;
  max-height: 320px;
}

/* ---- Guide pickers (Manual pair) ---- */

.picker-panel {
  width: 230px;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px oklch(0% 0 0 / 0.06), 0 1px 2px oklch(0% 0 0 / 0.04);
}
.picker-header {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
}
.picker-list {
  max-height: 260px;
  overflow-y: auto;
}
.picker-row {
  display: flex;
  align-items: center;
  padding: 9px 12px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  border-bottom: 1px solid var(--border-soft);
  cursor: pointer;
}
.picker-row:last-child {
  border-bottom: none;
}
.picker-row:hover {
  background: var(--bg);
}
.picker-row.selected {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  padding-left: 9px;
}

/* ---- Spacer orientation map (Manual pair) ---- */

.spacer-map {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 18px 22px 14px;
  box-shadow: 0 4px 16px oklch(0% 0 0 / 0.06), 0 1px 2px oklch(0% 0 0 / 0.04);
}
.spacer-map-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
}
.spacer-map-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.spacer-map-legend {
  display: flex;
  gap: 16px;
}
.spacer-map-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--text-muted);
}
.spacer-map-legend-item svg {
  color: var(--accent);
}
.spacer-map-legend-item.minus svg {
  color: var(--teal);
}

.spacer-map-track {
  position: relative;
  height: 110px;
  margin-top: 16px;
  /* Matches coverageMap.js's GUTTER (58px, reserved there for its row
     badges/"Target"/"Covered" labels) so the two components' "0" tick
     lines up exactly when a spacer map and a coverage track are
     stacked directly on top of each other, e.g. Manual pair's guide
     map above its saved-sets coverage track. */
  margin-left: 58px;
}
.spacer-map-gridlines {
  position: absolute;
  inset: 0;
}
.spacer-map-gridline {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border-soft);
}
.spacer-map-baseline {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--border);
}
.spacer-map-connector {
  position: absolute;
  top: calc(50% - 1px);
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
}
.spacer-map-connector.invalid {
  background: var(--danger);
}
.spacer-map-connector.reach {
  height: 4px;
  top: calc(50% - 2px);
  background: var(--teal);
}
.spacer-map-overlap {
  position: absolute;
  top: calc(50% - 2px);
  height: 4px;
  background: var(--teal);
  border-radius: 999px;
  z-index: 1;
  box-shadow: 0 0 0 2px var(--surface);
}

.spacer-map-row {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
}
.spacer-map-row.plus {
  top: 50%;
}
.spacer-map-row.minus {
  top: 50%;
}

.spacer-tri-hit {
  position: absolute;
  top: 0;
  width: 22px;
  height: 22px;
  margin-left: -11px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--accent-line);
}
.spacer-tri-hit.plus {
  transform: translateY(-100%);
  padding-bottom: 4px;
}
.spacer-tri-hit.minus {
  color: var(--teal-line);
  padding-top: 4px;
}
.spacer-tri-hit.plus::after,
.spacer-tri-hit.minus::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 1px;
  background: currentColor;
  opacity: 0.6;
}
.spacer-tri-hit.plus::after {
  bottom: 0;
  height: 10px;
}
.spacer-tri-hit.minus::after {
  top: 0;
  height: 10px;
}
.spacer-tri-hit:hover {
  color: var(--accent);
}
.spacer-tri-hit.minus:hover {
  color: var(--teal);
}
.spacer-tri-hit.selected {
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  z-index: 2;
}
.spacer-tri-hit.minus.selected {
  color: var(--teal);
  background: var(--teal-soft);
}

.spacer-map-ruler {
  position: relative;
  height: 14px;
  margin-top: 6px;
  margin-left: 58px; /* keep the ruler's own "0" under the track's, see .spacer-map-track */
}
.spacer-map-tick {
  position: absolute;
  font-size: 10.5px;
  color: var(--text-faint);
}

/* ---- Exon annotation (from "Fetch by gene") ---- */

.spacer-map-exon-row {
  position: relative;
  height: 16px;
  margin-top: 6px;
  margin-left: 58px; /* keep this row's own "0" under the track's, see .spacer-map-track */
}
.spacer-map-exon-bracket {
  position: absolute;
  top: 0;
  height: 5px;
  border: 1px solid var(--text-faint);
  border-top: none;
  border-radius: 0 0 2px 2px;
}
.spacer-map-exon-label {
  position: absolute;
  top: 6px;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-faint);
  white-space: nowrap;
}

/* ---- Gene symbol autocomplete ---- */

.gene-suggest-panel {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 20;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  box-shadow: 0 8px 24px oklch(0% 0 0 / 0.1);
  max-height: 260px;
  overflow-y: auto;
}
.gene-suggest-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-soft);
}
.gene-suggest-row:last-child {
  border-bottom: none;
}
.gene-suggest-row:hover {
  background: var(--bg);
}
.gene-suggest-desc {
  font-size: 12px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.landing-wrap {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}
.landing-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  box-shadow: 0 8px 28px oklch(0% 0 0 / 0.07), 0 1px 2px oklch(0% 0 0 / 0.04);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
@media (max-width: 900px) {
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .workspace {
    flex-direction: column;
  }
  .stat-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 10px;
  }
  .main-content {
    padding: 20px 16px;
  }
  .sidebar {
    padding: 16px 12px;
  }
  .chip-row {
    flex-wrap: wrap;
  }

  .landing-wrap {
    padding: 40px 14px;
  }
  .landing-card {
    padding: 18px;
  }
  .tab-row {
    width: 100%;
  }
  .tab-item {
    flex: 1;
    justify-content: center;
    padding: 8px 6px;
    font-size: 12.5px;
  }

  /* Card sides (Left/Right pegRNA) stack instead of sitting side by side --
     two ~half-width columns is too cramped for a wrapped sequence block. */
  .pegrna-sides-grid {
    grid-template-columns: 1fr !important;
  }
  .pegrna-side-divider {
    border-right: none !important;
    border-bottom: 1px solid var(--border-soft) !important;
    padding-right: 0 !important;
    padding-bottom: 16px !important;
  }

}

/* Manual pair's left-picker / preview / right-picker row -- three
   side-by-side panels, two of them a fixed 230px, leave the middle
   coverage-map preview too narrow to render its header/legend/ruler
   without overlapping well before the 640px breakpoint above: with the
   300px fixed sidebar back (>900px), the preview panel is squeezed to
   nothing all the way up past 1024px. Stack the row generously wide. */
@media (max-width: 1150px) {
  .guide-map-row {
    flex-direction: column;
    width: 100%;
  }
  .guide-map-row .picker-panel {
    width: 100%;
  }
}