/* =========================================================================
   Strassen Tensor-Core Atlas Viewer
   Distill-adjacent: clean, sparse, typographic. No iconography.
   ========================================================================= */

:root {
  --bg:           #fbfbf9;
  --bg-elev:     #ffffff;
  --bg-sunken:   #f3f3ef;
  --ink:          #1a1a1a;
  --ink-soft:    #4a4a4a;
  --ink-faint:   #8a8a8a;
  --rule:         #e3e1db;
  --rule-soft:   #efece6;

  --accent:      #1f6f4f;
  --accent-faint:#deeae5;
  --warn:        #b1432f;
  --warn-faint:  #f5dfd9;
  --neutral:     #8b8b85;

  --win-min:     #f1f7f3;
  --win-max:     #2d6c4d;
  --loss-min:    #fbeeea;
  --loss-max:    #a83a25;

  --shadow-1:    0 1px 2px rgba(20,20,20,0.04);
  --shadow-2:    0 2px 12px rgba(20,20,20,0.06);

  --serif:       "Iowan Old Style", "Charter", "Georgia", serif;
  --sans:        "Inter", system-ui, -apple-system, "Segoe UI", "Helvetica Neue", sans-serif;
  --mono:        "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --col-thin:    760px;
  --col-wide:    1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:           #14140f;
    --bg-elev:     #1c1c17;
    --bg-sunken:   #0f0f0c;
    --ink:          #ececec;
    --ink-soft:    #c0c0bc;
    --ink-faint:   #7d7d78;
    --rule:         #2c2c26;
    --rule-soft:   #232320;
    --accent:      #59c9a0;
    --accent-faint:#1a3a30;
    --warn:        #d97560;
    --warn-faint:  #3a201b;
    --win-min:     #163026;
    --win-max:     #6cd6ad;
    --loss-min:    #321b16;
    --loss-max:    #e57b67;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--sans);
  font-feature-settings: "kern", "liga", "clig", "calt";
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  font-weight: 400;
}

.num, .mono, code, pre, td.num, th.num, input[type="number"] {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums lining-nums;
}

main {
  max-width: var(--col-wide);
  margin: 0 auto;
  padding: 4rem 1.75rem 6rem;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--rule);
  transition: text-decoration-color 0.12s;
}
a:hover { text-decoration-color: var(--accent); }

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}
h1 { font-size: 2.4rem; line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: 1.35rem; line-height: 1.25; }
h3 { font-size: 1rem; line-height: 1.3; }

p { margin: 0 0 1em; }

section { margin-top: 4.5rem; }
section:first-of-type { margin-top: 3rem; }

.section-head { max-width: var(--col-thin); margin-bottom: 1.5rem; }
.section-note { color: var(--ink-soft); font-size: 0.94rem; margin: 0.25rem 0 0; }

/* ============= Masthead ============= */

.masthead { max-width: var(--col-thin); }

.kicker {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.25rem;
}

.lede {
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin: 0.5rem 0 1.75rem;
}

.abstract {
  font-size: 1rem;
  color: var(--ink);
  border-left: 2px solid var(--rule);
  padding-left: 1.25rem;
  margin: 0 0 1.75rem;
}

.links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}
.links a { padding: 0.1rem 0; }

/* ============= Best-of cards ============= */

.card-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.1rem 1.15rem 1.05rem;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: var(--ink-faint); }

.card .label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.4rem;
}
.card .value {
  font-family: var(--mono);
  font-size: 1.65rem;
  line-height: 1.05;
  font-weight: 500;
  color: var(--accent);
  margin: 0 0 0.55rem;
  letter-spacing: -0.01em;
}
.card .value.loss { color: var(--warn); }
.card .meta {
  font-size: 0.86rem;
  color: var(--ink-soft);
  margin: 0;
}
.card .meta .kbd {
  font-family: var(--mono);
  color: var(--ink);
}

.card.placeholder { color: var(--ink-faint); padding: 2rem 1rem; text-align: center; }
.loading { color: var(--ink-faint); font-style: italic; }

/* ============= Heatmap ============= */

.heatmap-wrap {
  overflow-x: auto;
  margin-top: 0.75rem;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1rem;
}

table.heatmap {
  border-collapse: separate;
  border-spacing: 4px;
  margin: 0 auto;
}
table.heatmap th, table.heatmap td {
  text-align: center;
  padding: 0;
}
table.heatmap th.col-h {
  font-weight: 500;
  font-size: 0.84rem;
  color: var(--ink-soft);
  padding: 0.4rem 0.6rem;
  white-space: nowrap;
  border-bottom: 1px solid var(--rule-soft);
}
table.heatmap th.row-h {
  font-weight: 500;
  font-size: 0.88rem;
  color: var(--ink);
  text-align: right;
  padding-right: 0.85rem;
  white-space: nowrap;
}
.hm-cell {
  width: 130px;
  height: 70px;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  transition: transform 0.1s, border-color 0.1s;
  background: var(--bg-sunken);
  color: var(--ink);
}
.hm-cell:hover { transform: scale(1.04); border-color: var(--ink); z-index: 1; position: relative; }
.hm-cell .hm-val {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.hm-cell .hm-meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-soft);
  letter-spacing: 0;
  white-space: nowrap;
}
.hm-cell.na {
  background: repeating-linear-gradient(
    45deg,
    var(--bg-sunken) 0,
    var(--bg-sunken) 6px,
    var(--rule-soft) 6px,
    var(--rule-soft) 7px
  );
  cursor: default;
  color: var(--ink-faint);
}
.hm-cell.na:hover { transform: none; }
.hm-cell.na .hm-val { font-size: 0.85rem; color: var(--ink-faint); font-weight: 400; }

.heatmap-controls {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin: 0.4rem 0 0.6rem;
}
.mode-toggle { display: inline-flex; align-items: baseline; gap: 0.5rem; }
.mode-toggle legend {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: inline;
  padding: 0;
  float: none;
}

/* heatmap value colors set inline by JS */

.legend {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--ink-soft);
  margin-top: 0.85rem;
}
.legend-item { display: inline-flex; align-items: center; gap: 0.4rem; }
.swatch {
  width: 14px; height: 14px;
  border-radius: 2px;
  border: 1px solid var(--rule);
}
.swatch.s-low  { background: var(--loss-max); }
.swatch.s-mid  { background: var(--bg-sunken); }
.swatch.s-high { background: var(--win-max); }
.swatch.s-na {
  background: repeating-linear-gradient(
    45deg,
    var(--bg-sunken) 0, var(--bg-sunken) 4px,
    var(--rule-soft) 4px, var(--rule-soft) 5px
  );
}

/* ============= Speedup-vs-N panels ============= */

.curves-wrap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 0.85rem;
  margin-top: 0.5rem;
}
.curves-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  margin-top: 0.85rem;
  font-size: 0.84rem;
  color: var(--ink-soft);
}
.curves-legend .legend-item { display: inline-flex; align-items: center; gap: 0.4rem; }
.curves-legend .swatch-line {
  display: inline-block;
  width: 18px;
  height: 2px;
  border-radius: 1px;
}

.curve-panel {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.6rem 0.75rem 0.5rem;
  position: relative;
}
.curve-panel .panel-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  margin: 0 0 0.3rem;
}
.curve-panel .panel-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.02em;
  margin: 0;
  font-family: var(--mono);
  flex-shrink: 0;
}
.curve-panel .panel-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.15rem 0.55rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-soft);
  line-height: 1.1;
}
.curve-panel .panel-legend .pl-item { display: inline-flex; align-items: center; gap: 0.25rem; white-space: nowrap; }
.curve-panel .panel-legend .pl-swatch {
  display: inline-block;
  width: 12px;
  height: 2px;
  border-radius: 1px;
}
.curve-panel svg { display: block; width: 100%; height: 200px; overflow: visible; }
.curve-panel .axis-line { stroke: var(--rule); stroke-width: 1; fill: none; }
.curve-panel .axis-tick { stroke: var(--rule-soft); stroke-width: 1; }
.curve-panel .axis-label, .curve-panel .tick-label {
  font-family: var(--mono);
  font-size: 9px;
  fill: var(--ink-faint);
}
.curve-panel .gridline { stroke: var(--rule-soft); stroke-width: 1; stroke-dasharray: 2 3; }
.curve-panel .baseline-1 { stroke: var(--ink-faint); stroke-width: 1; stroke-dasharray: 3 3; }
.curve-panel .curve-line {
  fill: none;
  stroke-width: 1.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.curve-panel .curve-dot { stroke: var(--bg-elev); stroke-width: 1; cursor: pointer; }
.curve-panel .curve-dot:hover { stroke-width: 2; r: 4.5; }
.curve-panel .panel-empty {
  font-family: var(--mono);
  font-size: 0.78rem;
  fill: var(--ink-faint);
  text-anchor: middle;
}

.curve-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 0.74rem;
  padding: 0.32rem 0.5rem;
  border-radius: 3px;
  white-space: nowrap;
  z-index: 5;
  opacity: 0;
  transition: opacity 0.1s;
}
.curve-tooltip.show { opacity: 1; }

/* ============= Frontier-LLM transfer (Hopper BF16) ============= */

.frontier-transfer .ft-card {
  background: var(--bg-elev);
}
.frontier-transfer .ft-card .label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.frontier-transfer .ft-card .value .iqr {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--ink-faint);
  letter-spacing: 0;
  margin-left: 0.4rem;
}
.frontier-transfer .ft-card .ft-explainer {
  margin: 0.45rem 0 0;
  font-size: 0.82rem;
  color: var(--ink-faint);
  line-height: 1.4;
}
.frontier-transfer .ft-breadth {
  margin-top: 1.75rem;
}
.frontier-transfer .ft-breadth h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 0.55rem;
  letter-spacing: -0.005em;
}
.frontier-transfer .ft-breadth-tablewrap {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  overflow-x: auto;
}
.mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.mini-table thead th {
  font-weight: 500;
  font-size: 0.82rem;
  color: var(--ink-soft);
  text-align: left;
  padding: 0.45rem 0.5rem 0.4rem;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
}
.mini-table thead th.num { text-align: right; font-family: var(--mono); }
.mini-table tbody td {
  padding: 0.45rem 0.5rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: baseline;
}
.mini-table tbody tr:last-child td { border-bottom: 0; }
.mini-table tbody td.num { font-family: var(--mono); text-align: right; }
.mini-table .ft-cell-win  { color: var(--accent); font-weight: 500; }
.mini-table .ft-cell-loss { color: var(--warn); font-weight: 500; }
.mini-table .iqr {
  color: var(--ink-faint);
  font-size: 0.78rem;
  margin-left: 0.25rem;
}

.frontier-transfer .ft-aux {
  margin-top: 1.75rem;
}
.frontier-transfer .ft-aux h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 0.55rem;
  letter-spacing: -0.005em;
}
.frontier-transfer .ft-bullets {
  margin: 0;
  padding: 0.55rem 0.85rem 0.75rem 1.5rem;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  list-style: disc;
}
.frontier-transfer .ft-bullets li {
  margin: 0.4rem 0;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--ink);
}
.frontier-transfer .ft-bullets li strong {
  font-weight: 600;
  color: var(--ink);
}
.frontier-transfer code {
  font-family: var(--mono);
  font-size: 0.86rem;
  background: var(--bg-sunken);
  padding: 0.04rem 0.28rem;
  border-radius: 2px;
}

/* ============= Category palette (shared) ============= */

/* light-mode */
:root {
  --cat-invention-bg:  #e8f1ec;
  --cat-invention-fg:  #1a4f3a;
  --cat-trial-bg:      #e7eef5;
  --cat-trial-fg:      #1a3a55;
  --cat-scaling-bg:    #ecebf3;
  --cat-scaling-fg:    #2c2858;
  --cat-validation-bg: #efece6;
  --cat-validation-fg: #4a4435;
  --cat-negative-bg:   #f3e6e1;
  --cat-negative-fg:   #6a2a1a;
  --cat-proposal-bg:   #efe9d9;
  --cat-proposal-fg:   #5a4a1a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --cat-invention-bg:  #1d3329;
    --cat-invention-fg:  #8edcb6;
    --cat-trial-bg:      #1a2a3a;
    --cat-trial-fg:      #9ec0e0;
    --cat-scaling-bg:    #221f30;
    --cat-scaling-fg:    #b1aae0;
    --cat-validation-bg: #2a261c;
    --cat-validation-fg: #c8b990;
    --cat-negative-bg:   #2e1a14;
    --cat-negative-fg:   #d99685;
    --cat-proposal-bg:   #2a2515;
    --cat-proposal-fg:   #d6c98c;
  }
}

.cat-chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.08rem 0.42rem;
  border-radius: 2px;
  white-space: nowrap;
  vertical-align: middle;
}
.cat-chip.cat-invention   { background: var(--cat-invention-bg);  color: var(--cat-invention-fg); }
.cat-chip.cat-trial       { background: var(--cat-trial-bg);      color: var(--cat-trial-fg); }
.cat-chip.cat-scaling     { background: var(--cat-scaling-bg);    color: var(--cat-scaling-fg); }
.cat-chip.cat-validation  { background: var(--cat-validation-bg); color: var(--cat-validation-fg); }
.cat-chip.cat-negative    { background: var(--cat-negative-bg);   color: var(--cat-negative-fg); }
.cat-chip.cat-proposal    { background: var(--cat-proposal-bg);   color: var(--cat-proposal-fg); }

/* ============= L-step index ============= */

.level-index-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0.4rem 0 1rem;
}
.cat-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.7rem;
  font-size: 0.78rem;
  color: var(--ink-soft);
}
.cat-legend .cat-chip { font-size: 0.7rem; }
.level-index-body {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.4rem 0.4rem 0.6rem;
}
.phase-block { border-bottom: 1px solid var(--rule-soft); }
.phase-block:last-child { border-bottom: 0; }
.phase-block summary {
  list-style: none;
  cursor: pointer;
  padding: 0.7rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  color: var(--ink);
  user-select: none;
}
.phase-block summary::-webkit-details-marker { display: none; }
.phase-block summary::before {
  content: "[+]";
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
}
.phase-block[open] summary::before { content: "[-]"; }
.phase-block summary:hover { background: var(--bg-sunken); }
.phase-block .phase-range {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-left: auto;
}
.phase-list {
  list-style: none;
  margin: 0;
  padding: 0.2rem 0.5rem 0.7rem 1.4rem;
}
.phase-list li {
  display: grid;
  grid-template-columns: 4.4rem auto 1fr auto;
  gap: 0.55rem;
  align-items: baseline;
  padding: 0.32rem 0.35rem;
  border-radius: 3px;
  font-size: 0.88rem;
  line-height: 1.35;
}
.phase-list li:hover { background: var(--bg-sunken); }
.phase-list .li-id {
  font-family: var(--mono);
  color: var(--ink);
  font-weight: 500;
  cursor: pointer;
}
.phase-list .li-id:hover { color: var(--accent); }
.phase-list .li-title { color: var(--ink-soft); }
.phase-list .li-autonomy {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
  text-align: right;
}
.phase-list .li-ref {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  text-decoration-color: var(--rule);
}
.phase-list .li-ref:hover { color: var(--accent); }
@media (max-width: 760px) {
  .phase-list li { grid-template-columns: 4.4rem 1fr; }
  .phase-list .li-cat, .phase-list .li-autonomy { grid-column: 2; }
  .phase-list .li-title { grid-column: 1 / -1; }
}

/* method cell embellishment in atlas table */
.cell-method-row {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.cell-method-row .cell-method { color: var(--ink); }
.cell-method-row .cat-chip { font-size: 0.66rem; padding: 0.05rem 0.36rem; }

/* ============= Filter panel ============= */

.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.4rem 1.5rem;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.4rem 1.5rem 1.6rem;
}
fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}
fieldset legend {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.55rem;
  padding: 0;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.chip {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--rule);
  padding: 0.32rem 0.62rem;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s, color 0.1s;
  letter-spacing: -0.005em;
}
.chip:hover { border-color: var(--ink-faint); }
.chip.selected {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
@media (prefers-color-scheme: dark) {
  .chip.selected { background: var(--accent); color: var(--bg); border-color: var(--accent); }
}

.range-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  align-items: center;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.range-row label { display: inline-flex; align-items: center; gap: 0.4rem; }
.range-row label.check { color: var(--ink); }
input[type="number"], input[type="text"], select {
  font-family: var(--mono);
  font-size: 0.86rem;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.3rem 0.5rem;
  width: 90px;
  transition: border-color 0.1s;
}
input[type="text"] { width: 100%; max-width: 220px; }
input[type="number"]:focus, input[type="text"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}
select { width: auto; padding-right: 1.5rem; }

.filter-actions {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 1px dashed var(--rule);
  padding-top: 1.1rem;
  margin-top: 0.2rem;
}
.count {
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.count .num { color: var(--ink); font-weight: 500; }

button.reset {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  padding: 0.34rem 0.7rem;
  border-radius: 3px;
  cursor: pointer;
  transition: border-color 0.1s, background 0.1s;
}
button.reset:hover { border-color: var(--ink); background: var(--bg-elev); }

/* ============= Table ============= */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--bg-elev);
}

table#atlas-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 900px;
}

#atlas-table thead th {
  position: sticky;
  top: 0;
  background: var(--bg-elev);
  text-align: left;
  font-weight: 500;
  color: var(--ink-soft);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
#atlas-table thead th:hover { color: var(--ink); }
#atlas-table thead th.num { text-align: right; }
#atlas-table thead th .sort {
  font-family: var(--mono);
  display: inline-block;
  margin-left: 0.4rem;
  color: var(--ink-faint);
  font-size: 0.82em;
  letter-spacing: 0;
  text-transform: lowercase;
  font-weight: 400;
}
#atlas-table thead th.sorted .sort { color: var(--accent); }

#atlas-table tbody td {
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
  white-space: nowrap;
}
#atlas-table tbody td.num { text-align: right; }
#atlas-table tbody tr:hover td { background: var(--bg-sunken); }

.cell-method, .cell-shape {
  font-family: var(--mono);
  font-size: 0.83rem;
}

.cell-speedup {
  display: inline-block;
  padding: 0.16rem 0.5rem;
  border-radius: 3px;
  font-family: var(--mono);
  font-weight: 500;
}
.cell-speedup .iqr {
  color: var(--ink-faint);
  font-weight: 400;
  margin-left: 0.4rem;
  font-size: 0.85em;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.table-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.pagination { display: flex; align-items: center; gap: 0.85rem; flex-wrap: wrap; }
.pagination button {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
  padding: 0.3rem 0.65rem;
  border-radius: 3px;
  cursor: pointer;
}
.pagination button:disabled { color: var(--ink-faint); cursor: default; }
.pagination button:not(:disabled):hover { border-color: var(--ink); }
.page-indicator { font-family: var(--mono); }
.page-size { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--ink-soft); }

/* ============= Footer ============= */

.page-foot {
  margin-top: 5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.5rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.page-foot h3 {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.7rem;
}
.cite pre {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.85rem 1rem;
  margin: 0 0 0.6rem;
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--ink);
}
.repro p { margin: 0 0 0.45rem; }
.repro .meta { color: var(--ink-faint); font-size: 0.85rem; }

/* ============= Toast ============= */

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(150%);
  background: var(--ink);
  color: var(--bg);
  font-size: 0.86rem;
  padding: 0.55rem 1rem;
  border-radius: 4px;
  box-shadow: var(--shadow-2);
  pointer-events: none;
  opacity: 0;
  transition: transform 0.18s, opacity 0.18s;
  z-index: 50;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

@media (max-width: 700px) {
  main { padding: 2.5rem 1.1rem 4rem; }
  h1 { font-size: 1.85rem; }
  .page-foot { grid-template-columns: 1fr; gap: 2rem; }
  .filter-grid { padding: 1.1rem 1.1rem 1.3rem; }
  .hm-cell { width: 96px; height: 60px; }
  .hm-cell .hm-val { font-size: 0.92rem; }
}