/* ===================================================================
   Project layer.

   main_free.css carries the Clarity typography and page chrome; this file
   holds the components the project pages built on it keep re-deriving —
   a palette, figure frames, result tables, stat strips and cards.

   Everything here is namespace-free and safe to delete piecemeal. Put
   anything genuinely specific to one paper in its own stylesheet rather
   than growing this one.
   =================================================================== */

:root {
  /* ink ramp — body text, secondary text, labels */
  --ink: #353535;
  --ink-2: #5f666c;
  --ink-3: #8a9198;

  /* rules: --rule for borders that should read, --hair for ones that shouldn't */
  --rule: #e0e3e5;
  --hair: #eceef0;

  /* one accent hue, reserved for measured quantities; --pos / --neg for
     signed results. Resist adding more: the palette is the restraint. */
  --navy: #1c365f;
  --navy-2: #41648f;
  --pos: #217d4c;
  --neg: #b03a2e;
  --mid: #8a9198;

  /* the hero band color, repeated on every .gray section */
  --band: #e0e4e6;
  --card: #ffffff;

  --sans: "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "Inconsolata", "Fira Code", Consolas, Menlo, monospace;
}

.sans { font-family: var(--sans); }

/* small caps-ish label above a heading */
.eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  line-height: 1.4;
}

tt, code, kbd, samp {
  font-family: var(--mono);
  font-size: 1.05em;
  /* ligatures turn `!=` and `->` into glyphs that no longer read as the
     characters the paper is talking about */
  font-feature-settings: "liga" 0, "calt" 0;
}
tt { background: none; padding: 0; }

/* footnote-sized aside under a figure or section */
.fnote { font-size: 88%; color: #666; }

/* ---------- hero buttons ---------- */
/* inline <svg> inside .button.icon, sized to match the Font Awesome glyphs */
.button.icon .btn-icon {
  height: 1.05em;
  width: auto;
  padding-left: 0.5em;
  padding-bottom: 1px;
  box-sizing: content-box;
  flex: none;
}

/* the frosted pill used for Paper / Code / Models / Data in the hero */
.button.icon.frosted {
  background-color: rgba(255, 255, 255, 0.45);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.12),
              inset 0 0 0 1px rgba(255, 255, 255, 0.6);
}

/* ---------- hero figure frame ---------- */
.cover-frame {
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.12),
              inset 0 0 0 1px rgba(255, 255, 255, 0.6);
  padding: 14px;
}
.cover-frame img {
  display: block;
  width: 100%;
  margin: 0 0 10px 0;
  padding: 0;
}
.cover-frame img:last-child { margin-bottom: 0; }

/* ---------- figure cards ---------- */
.figure-card {
  border: 1.5px solid #dfe6e9;
  border-radius: 10px;
  overflow: hidden;
  padding: 18px;
  background: var(--card);
}
/* main_free.css pads every img inside .container.blog; inside a card the
   card's own padding is the frame */
.figure-card img {
  display: block;
  width: 100%;
  padding: 0 !important;
  margin: 0;
}

.figure-row {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  margin: 0 auto;
}
.figure-row .figure-cell { flex: 1 1 0; min-width: 0; }
.figure-row .figure-cell .figure-card { margin: 0; }
.figure-row .subcaption {
  margin: 12px 0 0 0;
  padding: 0;
  text-align: center;
  font-weight: 600;
  font-size: 80%;
  line-height: 1.3;
  color: #2d3436;
}

/* ---------- result tables ---------- */
.table-wrap {
  overflow-x: auto;
  background: var(--card);
  border: 1.5px solid #dfe6e9;
  border-radius: 10px;
  padding: 16px 18px;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 14.5px;
  background: var(--card);
}
table.data th {
  text-align: left;
  font-weight: 700;
  color: var(--ink);
  padding: 0.55em 0.7em;
  border-bottom: 1.5px solid var(--ink);
  white-space: nowrap;
}
table.data td {
  padding: 0.45em 0.7em;
  border-bottom: 1px solid var(--hair);
  color: var(--ink-2);
}
table.data tbody tr:last-child td { border-bottom: none; }
/* main_free.css stripes every other body row; a table that carries its own
   emphasis reads better flat */
table.data tbody tr,
table.data tbody tr:nth-child(2n+1) { background: transparent; }

table.data td.num,
table.data th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
/* the row for this paper's own method */
table.data tr.ours td {
  color: var(--ink);
  font-weight: 700;
  background: #f6f8fa;
}
/* a full-width label splitting the body into blocks */
table.data tr.group td {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 1.1em;
  border-bottom: 1px solid var(--rule);
}
table.data .ci {
  font-size: 11.5px;
  color: var(--ink-3);
  padding-left: 0.35em;
}

/* ---------- number strip ---------- */
.stat-row { display: flex; gap: 20px; flex-wrap: wrap; margin: 0; }
.stat {
  flex: 1 1 180px;
  background: var(--card);
  border: 1.5px solid #dfe6e9;
  border-radius: 10px;
  padding: 16px 18px;
  text-align: center;
}
.stat .n {
  font-family: var(--sans);
  font-size: 26px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.stat .l {
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-2);
  margin-top: 6px;
  line-height: 1.35;
}

/* ---------- card grid ---------- */
.card-grid { display: flex; gap: 20px; flex-wrap: wrap; }
.card {
  flex: 1 1 300px;
  min-width: 0;
  background: var(--card);
  border: 1.5px solid #dfe6e9;
  border-radius: 10px;
  padding: 16px 18px;
}
.card .card-head {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}
.card .card-body {
  font-family: "Charter", Georgia, serif;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-2);
}
.card .card-body b { color: var(--ink); }

/* ---------- key/value list ---------- */
.kv {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 18px;
  font-family: var(--sans);
  font-size: 14px;
  align-items: baseline;
}
.kv dt { color: var(--ink-3); font-weight: 600; }
.kv dd { margin: 0; color: var(--ink); font-variant-numeric: tabular-nums; }

/* ---------- footer ---------- */
footer .container p { text-align: center; }

/* ---------- responsive ---------- */
@media screen and (max-width: 768px) {
  .figure-row { flex-direction: column; gap: 20px; }
  .figure-card { max-width: 100% !important; padding: 12px; }
  .container.blog p.caption { max-width: 100% !important; }
  .card-grid { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}