:root {
  --bg: #fbfaf8;
  --panel: #ffffff;
  --ink: #1d1b19;
  --muted: #6e6862;
  --line: #e4e0db;
  --grid: #ebe7e2;
  --head: #f3f0ec;
  --accent: #b4237f;
  --pink: #ffaff3;
  --select: #2f6fdb;
  --reads: rgba(47, 111, 219, 0.12);
  --readby: rgba(214, 140, 20, 0.16);
  --spill: rgba(180, 35, 127, 0.07);
  --error: #c0392b;
  --flash: rgba(255, 175, 243, 0.65);
  --number: #1d1b19;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151413;
    --panel: #1d1c1a;
    --ink: #ecE8e3;
    --muted: #a19a93;
    --line: #34312e;
    --grid: #2c2a27;
    --head: #24221f;
    --accent: #ff8fe6;
    --select: #6b9cff;
    --reads: rgba(107, 156, 255, 0.16);
    --readby: rgba(240, 170, 60, 0.18);
    --spill: rgba(255, 143, 230, 0.08);
    --error: #ff7b6b;
    --flash: rgba(255, 143, 230, 0.4);
    --number: #ecE8e3;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.45 var(--sans);
}

a { color: var(--accent); }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px 8px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 12px; }

.logo {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--pink);
  color: #151515;
  font: italic 600 20px Georgia, serif;
}

h1 { margin: 0; font-size: 20px; letter-spacing: -0.01em; }
.deva { font-weight: 400; color: var(--muted); margin-left: 4px; }
.tagline { margin: 0; color: var(--muted); }

nav { display: flex; align-items: center; gap: 14px; }

.sample-pick { display: flex; align-items: center; gap: 8px; color: var(--muted); }

select, input, button {
  font: inherit;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
}

select { padding: 5px 8px; }

.gh {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
  color: var(--ink);
}

.note {
  margin: 0 20px 10px;
  color: var(--muted);
  max-width: 900px;
}

main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 16px;
  padding: 0 20px 12px;
}

.sheet-area {
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.formula-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}

.address {
  min-width: 72px;
  font: 13px var(--mono);
  color: var(--muted);
}

.fx { font: italic 14px Georgia, serif; color: var(--muted); }

#input {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  font: 13px var(--mono);
}

#input:focus, .fsearch:focus, select:focus { outline: 2px solid var(--select); outline-offset: -1px; }

.parse {
  padding: 4px 12px;
  font: 12px var(--mono);
  color: var(--error);
  border-bottom: 1px solid var(--line);
}

.grid-wrap {
  overflow: auto;
  max-height: calc(100vh - 250px);
  min-height: 320px;
}

.grid {
  border-collapse: separate;
  border-spacing: 0;
  font: 13px var(--mono);
  outline: none;
}

.grid th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--head);
  color: var(--muted);
  font-weight: 500;
  border-right: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
  padding: 3px 6px;
  min-width: 100px;
}

.grid th.corner { left: 0; z-index: 3; min-width: 40px; }

.grid td.rowhead {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--head);
  color: var(--muted);
  text-align: right;
  padding: 0 6px;
  min-width: 40px;
}

.grid td {
  height: 26px;
  max-width: 180px;
  padding: 0 6px;
  border-right: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: cell;
  position: relative;
}

.grid td.number, .grid td.bool { text-align: right; }
.grid td.overflow { overflow: visible; text-overflow: clip; z-index: 1; }
.grid td.bool { font-variant: small-caps; }
.grid td.error { color: var(--error); text-align: center; }
.grid td.formula::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  border-top: 6px solid var(--accent);
  border-right: 6px solid transparent;
  opacity: 0.6;
}
.grid td.spilled { background: var(--spill); }
.grid td.reads { background: var(--reads); }
.grid td.readby { background: var(--readby); }
.grid td.selected { box-shadow: inset 0 0 0 2px var(--select); }
.grid td.spill-edge-t { border-top: 1px dashed var(--accent); }
.grid td.spill-edge-b { border-bottom: 1px dashed var(--accent); }
.grid td.spill-edge-l { border-left: 1px dashed var(--accent); }
.grid td.spill-edge-r { border-right: 1px dashed var(--accent); }

.grid td.flash { animation: flash 900ms ease-out; }

@keyframes flash {
  from { background: var(--flash); }
  to { background: transparent; }
}

.tabs {
  display: flex;
  gap: 2px;
  padding: 6px 8px;
  border-top: 1px solid var(--line);
  background: var(--head);
  overflow-x: auto;
}

.tabs button {
  padding: 4px 12px;
  border-radius: 6px 6px 0 0;
  border-bottom: none;
  cursor: pointer;
  color: var(--muted);
}

.tabs button.active { color: var(--ink); font-weight: 600; background: var(--panel); }

.side { display: flex; flex-direction: column; gap: 12px; min-width: 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
}

.panel h2 {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.statline { margin: 0; }
.statline strong { color: var(--accent); }
.badge {
  display: inline-block;
  margin-top: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: var(--head);
  color: var(--muted);
}

.facts { margin: 0; display: grid; grid-template-columns: 64px 1fr; gap: 6px 10px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; min-width: 0; overflow-wrap: anywhere; font: 13px var(--mono); }

.chip {
  display: inline-block;
  margin: 0 4px 4px 0;
  padding: 0 6px;
  border-radius: 4px;
  border: 1px solid var(--line);
  background: var(--head);
  font: 12px var(--mono);
  cursor: pointer;
  color: var(--ink);
}

details { margin-top: 10px; }
summary { cursor: pointer; color: var(--muted); }

pre {
  margin: 8px 0 0;
  max-height: 240px;
  overflow: auto;
  font: 12px/1.5 var(--mono);
  white-space: pre;
}

.fsearch { width: 100%; padding: 6px 8px; margin-bottom: 8px; }

.flist {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 260px;
  overflow: auto;
  font: 12px var(--mono);
}

.flist li { padding: 3px 4px; border-radius: 4px; cursor: pointer; }
.flist li:hover { background: var(--head); }
.flist .cat { color: var(--muted); font-family: var(--sans); font-size: 11px; float: right; }
.muted { color: var(--muted); font-weight: 400; text-transform: none; letter-spacing: 0; }

footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 20px 20px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
  .grid-wrap { max-height: 60vh; }
  .grid th { min-width: 84px; }
}