/* Exaba Analytics — browser app.
   Palette and mark specs match the library's SVG renderer, so a chart looks the
   same here, in a served SVG and on a PDF page. Dark mode is a selected set of
   steps for the dark surface, not an automatic inversion. */

:root {
  color-scheme: light;
  --surface:        #fcfcfb;
  --surface-raised: #ffffff;
  --surface-sunken: #f3f2ee;
  --ink:            #0b0b0b;
  --ink-secondary:  #52514e;
  --ink-muted:      #6b6a66;
  --grid:           #e8e7e3;
  --axis:           #c9c8c3;
  --accent:         #2a78d6;
  --good:           #008300;
  --warn:           #eda100;
  --bad:            #e34948;
  --radius: 10px;
  --pad: 16px;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --surface:        #1a1a19;
    --surface-raised: #232322;
    --surface-sunken: #141413;
    --ink:            #ffffff;
    --ink-secondary:  #c3c2b7;
    --ink-muted:      #9b9a92;
    --grid:           #2e2e2b;
    --axis:           #464642;
    --accent:         #3987e5;
    --good:           #2fa32f;
    --warn:           #c98500;
    --bad:            #e66767;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --surface:        #1a1a19;
  --surface-raised: #232322;
  --surface-sunken: #141413;
  --ink:            #ffffff;
  --ink-secondary:  #c3c2b7;
  --ink-muted:      #9b9a92;
  --grid:           #2e2e2b;
  --axis:           #464642;
  --accent:         #3987e5;
  --good:           #2fa32f;
  --warn:           #c98500;
  --bad:            #e66767;
}

* { box-sizing: border-box; }
img { max-width: 100%; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font: 14px/1.5 ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 24px 16px 64px; }

header.top { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
header.top h1 { font-size: 20px; margin: 0; letter-spacing: -0.01em; }
header.top .tag {
  font-size: 11px; color: var(--good); border: 1px solid currentColor;
  border-radius: 999px; padding: 2px 8px; font-weight: 600;
}
.lede { color: var(--ink-muted); margin: 0 0 20px; max-width: 70ch; }

/* ---- Drop zone + paste box ---- */
.intake { display: grid; gap: 12px; }
.drop {
  border: 2px dashed var(--axis);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
  background: var(--surface-sunken);
  transition: border-color .15s, background .15s;
}
.drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface-sunken)); }
.drop p { margin: 0 0 10px; color: var(--ink-secondary); }
.drop .hint { font-size: 12px; color: var(--ink-muted); }

textarea {
  width: 100%; min-height: 140px; resize: vertical;
  font: 12px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: 12px; border-radius: var(--radius);
  border: 1px solid var(--axis); background: var(--surface-raised); color: var(--ink);
}
textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
button {
  font: inherit; font-weight: 600; cursor: pointer;
  border-radius: 8px; padding: 8px 14px;
  border: 1px solid var(--axis); background: var(--surface-raised); color: var(--ink);
}
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button:hover:not(:disabled) { filter: brightness(1.06); }
button:disabled { opacity: .5; cursor: not-allowed; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---- Messages ---- */
.note, .err {
  border-radius: var(--radius); padding: 12px 14px; margin: 14px 0; font-size: 13px;
  border-left: 3px solid;
}
.note { background: var(--surface-sunken); border-color: var(--accent); color: var(--ink-secondary); }
.err  { background: color-mix(in srgb, var(--bad) 10%, var(--surface)); border-color: var(--bad); color: var(--ink); }
.err h3 { margin: 0 0 6px; font-size: 13px; }
.err code, .note code {
  font: 12px ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--surface-sunken); padding: 1px 5px; border-radius: 4px;
}
.err ul { margin: 6px 0 0 18px; padding: 0; }

/* ---- Stat tiles ---- */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; margin: 18px 0; }
.tile { background: var(--surface-sunken); border-radius: var(--radius); padding: 12px 14px; }
.tile .label { font-size: 11px; color: var(--ink-muted); }
.tile .value { font-size: 22px; font-weight: 600; letter-spacing: -0.02em; margin-top: 2px; }
.tile .delta { font-size: 11px; color: var(--ink-secondary); margin-top: 2px; }
.tile .delta.up { color: var(--good); }
.tile .delta.down { color: var(--bad); }

/* ---- Cards, charts, tables ---- */
.card {
  background: var(--surface-raised); border: 1px solid var(--grid);
  border-radius: var(--radius); padding: 16px; margin: 16px 0;
}
.card > h2 { font-size: 15px; margin: 0 0 2px; }
.card > .sub { font-size: 12px; color: var(--ink-muted); margin: 0 0 12px; }
.chart { overflow-x: auto; }
.chart svg { display: block; min-width: 520px; }

table { border-collapse: collapse; width: 100%; font-size: 13px; }
.scroll { overflow-x: auto; }
th, td { padding: 6px 10px; text-align: right; white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
thead th {
  font-size: 11px; color: var(--ink-secondary); font-weight: 600;
  border-bottom: 1px solid var(--axis); position: sticky; top: 0; background: var(--surface-raised);
}
tbody tr + tr td { border-top: 1px solid var(--grid); }
tbody td { font-variant-numeric: tabular-nums; }
tfoot td { border-top: 1px solid var(--axis); font-weight: 600; }
td.pos { color: var(--good); }
td.neg { color: var(--bad); }

/* Cohort heatmap: one hue, light to dark. */
.heat td.cell { color: #fff; text-align: center; border-radius: 3px; }
.heat td.cell.light { color: var(--ink); }
.heat td.empty { background: transparent; }

.controls { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; margin-bottom: 14px; }
.controls label { display: grid; gap: 3px; font-size: 11px; color: var(--ink-muted); }
select, input[type="number"] {
  font: inherit; font-size: 13px; padding: 5px 8px; border-radius: 7px;
  border: 1px solid var(--axis); background: var(--surface-raised); color: var(--ink);
}

footer.foot { margin-top: 36px; font-size: 12px; color: var(--ink-muted); border-top: 1px solid var(--grid); padding-top: 14px; }
footer.foot a { color: var(--accent); }

@media (max-width: 560px) {
  .wrap { padding: 16px 16px 48px; }
  .tile .value { font-size: 19px; }
}

/* ---- Tabs ---- */
nav.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--grid); margin: 0 0 18px; }
nav.tabs .tab {
  border: none; border-bottom: 2px solid transparent; border-radius: 0;
  background: transparent; color: var(--ink-muted); padding: 8px 14px; margin-bottom: -1px;
}
nav.tabs .tab.active { color: var(--ink); border-bottom-color: var(--accent); }
nav.tabs .tab:hover { color: var(--ink); }