:root {
  --bg: #eef2f7;
  --panel: #ffffff;
  --edge: #d8e0ea;
  --ink: #16202e;
  --ink-soft: #5a6a80;
  --line: #2547d0;
  --data: #efa02d;
  --good: #475569;
  --danger: #c0392b;
  --ok: #0f9d58;
  --beta-bg: #fff1d6;
  --beta-ink: #8a5300;
  --beta-edge: #f3c77c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 32, 46, 0.04), 0 10px 34px rgba(20, 32, 46, 0.06);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1620;
    --panel: #16202e;
    --edge: #2a3646;
    --ink: #e7edf5;
    --ink-soft: #9fb0c6;
    --danger: #ef6a5a;
    --ok: #34c98d;
    --beta-bg: #3a2a10;
    --beta-ink: #f6c26b;
    --beta-edge: #7a5520;
  }
}
* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
}
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.45;
  padding: 26px 18px 48px;
  -webkit-font-smoothing: antialiased;
}
.wrap {
  max-width: 1040px;
  margin: 0 auto;
}
header.hub {
  margin-bottom: 18px;
}
header.hub h1 {
  font-size: 30px;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  font-weight: 750;
}
header.hub p {
  color: var(--ink-soft);
  margin: 0;
  max-width: 74ch;
}
.search {
  width: 100%;
  margin: 18px 0 24px;
  padding: 12px 14px;
  font: 500 15px var(--sans);
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 10px;
}
.topic {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin: 24px 0 10px;
  font-weight: 700;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.card {
  position: relative;
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  transition:
    transform 0.08s ease,
    border-color 0.08s ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--line);
}
.card[aria-disabled="true"] {
  opacity: 0.6;
  pointer-events: none;
}
.card h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
}
.card p {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-soft);
}
.badge {
  display: inline-block;
  margin-top: 10px;
  padding: 2px 8px;
  font: 700 10px var(--sans);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 999px;
}
.badge.tested {
  background: #0f9d5820;
  color: #0f9d58;
}
.badge.planned {
  background: var(--edge);
  color: var(--ink-soft);
}
.empty {
  color: var(--ink-soft);
  padding: 20px 0;
}
.card.has-medal h3 {
  padding-right: 52px;
}
.medal {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 2px 8px;
  font: 700 10px/1.5 var(--sans);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--beta-ink);
  background: var(--beta-bg);
  border: 1px solid var(--beta-edge);
  border-radius: 999px;
}
.card .ext {
  color: var(--ink-soft);
  font-weight: 500;
}
/* site footer: markup removed from every page for now (2026-09-28); styles kept for its return */
.site-foot {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 44px;
  padding-top: 14px;
  border-top: 1px solid var(--edge);
  font-size: 13px;
  color: var(--ink-soft);
}
.site-foot .who {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--ink) 35%, transparent);
  text-underline-offset: 3px;
}
.site-foot .who:hover {
  text-decoration-color: currentColor;
}
.site-foot .logo {
  height: 34px;
  width: auto;
  flex: none;
}

/* ---------------------------------------------------------------- */
/* Tool view (interactive tool pages under /tools/<slug>/)          */
/* ---------------------------------------------------------------- */
.back {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
}
.back:hover {
  color: var(--ink);
}
.tool {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.tool-head {
  padding: 20px 22px 14px;
  border-bottom: 1px solid var(--edge);
}
.tool-head h1 {
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  font-weight: 750;
}
.tool-head .sub {
  font-size: 14.5px;
  color: var(--ink-soft);
  max-width: 74ch;
  margin: 0;
}

/* mode switch (Simulated cases / Your data) */
.modebar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 22px;
  border-bottom: 1px solid var(--edge);
  flex-wrap: wrap;
}
.modebar .lbl {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-weight: 600;
}
.seg2 {
  display: inline-flex;
  background: var(--bg);
  border: 1px solid var(--edge);
  border-radius: 9px;
  padding: 3px;
}
.seg2 button {
  font: 650 12.5px/1 var(--sans);
  color: var(--ink-soft);
  border: 0;
  background: transparent;
  padding: 8px 13px;
  border-radius: 7px;
  cursor: pointer;
}
.seg2 button[aria-pressed="true"] {
  background: var(--line);
  color: #fff;
  box-shadow: 0 1px 2px rgba(37, 71, 208, 0.35);
}
.modehint {
  font-size: 12px;
  color: var(--ink-soft);
}
.mode-panel[hidden] {
  display: none;
}

/* simulated-case controls */
.controls {
  border-bottom: 1px solid var(--edge);
  padding: 13px 22px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.controls .lbl {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-weight: 600;
  margin-right: 2px;
}
.chips {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}
.case,
.ghost,
.btn {
  font: 600 12.5px/1 var(--sans);
  color: var(--ink-soft);
  cursor: pointer;
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 9px;
  padding: 8px 11px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.case:hover,
.ghost:hover,
.btn:hover {
  color: var(--ink);
}
.case[aria-pressed="true"] {
  color: var(--line);
  border-color: var(--line);
  background: color-mix(in srgb, var(--line) 9%, var(--panel));
}
.btn.primary {
  background: var(--line);
  color: #fff;
  border-color: var(--line);
}
.btn.primary:hover {
  color: #fff;
}
.spacer {
  flex: 1 1 auto;
}

/* true-vs-fitted model spec */
.spec {
  padding: 12px 22px 13px;
  border-bottom: 1px solid var(--edge);
  background: color-mix(in srgb, var(--edge) 25%, var(--panel));
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.spec .r {
  display: flex;
  gap: 10px;
  align-items: baseline;
  flex-wrap: wrap;
}
.spec .tag {
  font: 700 10px/1.3 var(--sans);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
  flex: none;
  width: 88px;
}
.spec .eq {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  line-height: 1.4;
}
.spec .note {
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 1px;
}

/* diagnostic-plot view switcher */
.viewbar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  background: var(--bg);
  border-bottom: 1px solid var(--edge);
  padding: 8px 18px;
}
.viewbar button {
  font: 600 12.5px/1 var(--sans);
  color: var(--ink-soft);
  border: 1px solid transparent;
  background: transparent;
  padding: 8px 11px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}
.viewbar button:hover {
  color: var(--ink);
}
.viewbar button[aria-pressed="true"] {
  background: var(--line);
  color: #fff;
  box-shadow: 0 1px 2px rgba(37, 71, 208, 0.35);
}

/* plot + rail layout */
.body {
  display: flex;
  align-items: stretch;
}
.plot-area {
  flex: 1 1 auto;
  min-width: 0;
  padding: 12px 8px 6px 12px;
}
.plot-area svg {
  width: 100%;
  height: auto;
  display: block;
}
.predtoggle {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 6px;
}
.predtoggle[hidden] {
  display: none;
}
.predtoggle .lab {
  font-size: 11.5px;
  color: var(--ink-soft);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.predsel {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 5px;
}
.predsel button {
  font: 650 12px/1 var(--mono);
  border: 1px solid var(--edge);
  background: var(--panel);
  color: var(--ink-soft);
  padding: 7px 10px;
  border-radius: 6px;
  cursor: pointer;
}
.predsel button[aria-pressed="true"] {
  color: var(--line);
  border-color: var(--line);
  background: color-mix(in srgb, var(--line) 8%, var(--panel));
}
.rail {
  width: 256px;
  flex: none;
  border-left: 1px solid var(--edge);
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.rail .cap {
  font-size: 11.5px;
  color: var(--ink-soft);
  margin-bottom: 6px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.look {
  font-size: 13px;
  color: var(--ink);
}
.look p {
  margin: 0;
  color: var(--ink);
}
.caption {
  padding: 2px 22px 20px;
  font-size: 14.5px;
  color: var(--ink);
  max-width: 88ch;
}

/* "Your data" panel */
.datapanel {
  padding: 14px 22px 15px;
  border-bottom: 1px solid var(--edge);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.dlab {
  font-size: 12px;
  color: var(--ink-soft);
  font-weight: 600;
  margin-bottom: 6px;
}
.datapanel textarea {
  width: 100%;
  min-height: 76px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.45;
  border: 1px solid var(--edge);
  border-radius: 8px;
  padding: 9px 11px;
  resize: vertical;
  color: var(--ink);
  background: var(--panel);
}
.datapanel textarea.drag {
  border: 2px dashed var(--line);
  background: color-mix(in srgb, var(--line) 6%, var(--panel));
}
.dbtns {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 9px;
}
.dstatus {
  font-size: 12px;
  color: var(--ink-soft);
}
.dstatus.err {
  color: var(--danger);
}
.dstatus.ok {
  color: var(--ok);
}
.mapper {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: flex-start;
  border-top: 1px dashed var(--edge);
  padding-top: 12px;
}
.mapper[hidden] {
  display: none;
}
.col-response {
  font-size: 12.5px;
  color: var(--ink-soft);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.col-response select {
  font: 500 13px/1 var(--sans);
  padding: 8px 9px;
  border: 1px solid var(--edge);
  border-radius: 7px;
  background: var(--panel);
  color: var(--ink);
  min-width: 130px;
}
.col-predictors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}
.col-predictor {
  font-size: 13px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.fit-error {
  margin: 0 22px 14px;
  padding: 10px 12px;
  border: 1px solid var(--danger);
  border-radius: 8px;
  background: color-mix(in srgb, var(--danger) 8%, var(--panel));
  color: var(--danger);
  font-size: 13px;
}
.fit-error[hidden] {
  display: none;
}
.results[hidden] {
  display: none;
}
.readout-table {
  padding: 14px 22px 4px;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

/* results-table styles referenced by ui/table.js */
table.ro {
  width: 100%;
  max-width: 320px;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12.5px;
}
table.ro th {
  text-align: left;
  font: 700 10.5px/1.3 var(--sans);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0 0 6px;
}
table.ro th.v {
  text-align: right;
}
table.ro td {
  padding: 2.5px 0;
}
td.k {
  color: var(--ink-soft);
}
td.v {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

:focus-visible {
  outline: 2px solid var(--line);
  outline-offset: 2px;
  border-radius: 6px;
}

@media (max-width: 760px) {
  .body {
    flex-direction: column;
  }
  .rail {
    width: auto;
    border-left: none;
    border-top: 1px solid var(--edge);
  }
  .tool-head h1 {
    font-size: 22px;
  }
  .mapper {
    flex-direction: column;
  }
}
.col-predictor[hidden] {
  display: none;
}