/* HumanoidToolBench project page */

/* Inter (SIL Open Font License, static/fonts/OFL.txt), served from this site so
   the first paint does not wait on a third-party stylesheet. */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215,
    U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/inter-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304,
    U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0,
    U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/inter-greek.woff2") format("woff2");
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}

:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-tint: #f6f7ff;
  --bg-ink: #151929;
  --ink: #1b2030;
  --ink-2: #4a5168;
  --ink-3: #666d85;
  --line: #e4e6f1;
  --line-strong: #cfd3e6;
  --brand: #4f5ff0;
  --brand-deep: #3a47c4;
  --brand-soft: #eef0ff;
  --purple-soft: #f4edff;
  --amber: #a87800;
  --amber-soft: #fff6dc;
  /* Sequential ramp for the heat tables: surface -> indigo. Ink text clears
     4.5:1 on every step, so values stay readable without switching colour. */
  --heat-0: #ffffff;
  --heat-1: #7d8bff;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(27, 32, 48, 0.05), 0 8px 24px rgba(27, 32, 48, 0.06);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "Noto Sans", "Apple SD Gothic Neo", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --wrap: 1120px;
  --gutter: 20px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--brand-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--brand);
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

code,
pre {
  font-family: var(--mono);
  font-size: 0.88em;
}

p code {
  padding: 0.12em 0.4em;
  border-radius: 5px;
  background: var(--brand-soft);
  color: #2b3480;
  white-space: nowrap;
}

.wrap {
  width: min(var(--wrap), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 16px;
  top: 12px;
  z-index: 100;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

/* ---------- Top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  transition: border-color 0.2s ease;
}

.topbar.is-stuck {
  border-bottom-color: var(--line);
}

.topbar .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: 30px;
  height: 30px;
}

.brand span b {
  color: var(--brand);
  font-weight: 700;
}

.topnav {
  display: flex;
  gap: 2px;
  margin-left: auto;
}

.topnav a {
  padding: 7px 11px;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.topnav a:hover,
.topnav a.is-active {
  background: var(--brand-soft);
  color: var(--brand-deep);
}

.topbar .btn {
  flex: none;
}

@media (max-width: 860px) {
  .topnav {
    display: none;
  }
  .topbar .btn {
    margin-left: auto;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease,
    background 0.15s ease;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex: none;
}

.btn:hover {
  border-color: var(--brand);
  color: var(--ink);
  box-shadow: 0 4px 14px rgba(79, 95, 240, 0.16);
  transform: translateY(-1px);
}

.btn-primary {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
}

.btn-primary:hover {
  border-color: var(--brand-deep);
  background: var(--brand-deep);
  color: #fff;
}

.btn-sm {
  padding: 7px 14px;
  font-size: 14px;
}

.btn[aria-disabled="true"] {
  border-style: dashed;
  background: transparent;
  color: var(--ink-3);
  cursor: default;
  pointer-events: none;
}

.btn small {
  font-size: 12px;
  font-weight: 500;
  opacity: 0.8;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 56px;
  text-align: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto -10%;
  height: 900px;
  z-index: -1;
  background: radial-gradient(40% 50% at 28% 40%, rgba(91, 108, 255, 0.16), transparent 70%),
    radial-gradient(36% 46% at 74% 34%, rgba(145, 85, 232, 0.13), transparent 70%);
}

.hero h1 {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.hero-logo {
  width: min(480px, 82%);
  margin: 0 auto;
}

.hero-title {
  display: block;
  max-width: 860px;
  margin: 20px auto 0;
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 750;
  line-height: 1.18;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.hero-title em {
  color: var(--brand);
  font-style: normal;
}

.hero-sum {
  max-width: 720px;
  margin: 16px auto 0;
  color: var(--ink-2);
  font-size: 18px;
  line-height: 1.55;
  text-wrap: pretty;
}

.byline {
  margin: 14px auto 0;
  color: var(--ink-2);
  font-size: 16px;
}

.byline a {
  color: var(--ink);
  font-weight: 600;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 22px auto 0;
}

.video-frame {
  position: relative;
  max-width: 920px;
  margin: 36px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #0d101b;
  box-shadow: 0 2px 4px rgba(27, 32, 48, 0.06), 0 24px 60px rgba(58, 71, 196, 0.18);
}

.video-frame video {
  width: 100%;
  aspect-ratio: 16 / 9;
}

.note {
  margin: 12px 0 0;
  color: var(--ink-3);
  font-size: 14px;
}

/* ---------- Sections ---------- */

section {
  padding: 72px 0;
}

section.tint {
  background: var(--bg-tint);
}

section.tight {
  padding-top: 8px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h2 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(25px, 3vw, 34px);
  font-weight: 750;
  line-height: 1.18;
  letter-spacing: -0.028em;
  text-wrap: balance;
}

h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

h4 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}

.lede {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--ink-2);
  font-size: 18px;
  line-height: 1.6;
}

.sub {
  margin-top: 48px;
}

.sub > h3 + p {
  max-width: 760px;
  margin: 8px 0 0;
  color: var(--ink-2);
}

/* ---------- Clip rows ---------- */

.row-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  margin: 44px 0 14px;
}

.row-head.first {
  margin-top: 28px;
}

.row-head p {
  margin: 0;
  color: var(--ink-2);
  font-size: 15.5px;
}

.clips {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.clips.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.clips.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.clip {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.clip video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #10131f;
  object-fit: cover;
}

.clip figcaption {
  margin: 0;
  padding: 12px 14px 14px;
}

.clip b {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  color: var(--ink);
  font-size: 15.5px;
  letter-spacing: -0.01em;
}

.clip span.cap {
  display: block;
  margin-top: 4px;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.45;
}

.chip {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.chip.amber {
  background: var(--amber-soft);
  color: #7a5700;
}

.chip.purple {
  background: var(--purple-soft);
  color: #6a35c4;
}

.chip.ok {
  background: #e4f6e9;
  color: #17683a;
}

.chip.bad {
  background: #fdeaea;
  color: #a52a2a;
}

@media (max-width: 900px) {
  .clips,
  .clips.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .clips,
  .clips.two {
    grid-template-columns: minmax(0, 1fr);
  }
  .clips.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
  .clips.four .cap {
    display: none;
  }
}

/* ---------- Overview ---------- */

.abstract {
  max-width: 860px;
  margin-top: 18px;
  font-size: 17.5px;
  line-height: 1.7;
}

.abstract p {
  margin: 0 0 0.9em;
}

.stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 32px 0 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  list-style: none;
}

.stats li {
  padding: 20px 20px 18px;
  border-left: 1px solid var(--line);
}

.stats li:first-child {
  border-left: 0;
}

.stats b {
  display: block;
  font-size: 32px;
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.stats span {
  display: block;
  margin-top: 6px;
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.4;
}

@media (max-width: 900px) {
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .stats li {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .stats li:nth-child(-n + 2) {
    border-top: 0;
  }
  .stats li:nth-child(even) {
    border-left: 1px solid var(--line);
  }
  .stats li:last-child {
    grid-column: 1 / -1;
  }
}

/* ---------- Disclosures ---------- */

details.more {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
}

details.more > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 18px;
  font-size: 15.5px;
  font-weight: 650;
  cursor: pointer;
  list-style: none;
}

details.more > summary::-webkit-details-marker {
  display: none;
}

details.more > summary::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
}

details.more[open] > summary::before {
  transform: rotate(45deg);
}

details.more > summary:hover {
  color: var(--brand-deep);
}

details.more > .inner {
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line);
}

.more-group {
  margin-top: 28px;
}

/* ---------- Figures ---------- */

figure {
  margin: 0;
}

.fig img {
  width: 100%;
  border-radius: 8px;
}

figcaption {
  margin-top: 10px;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.5;
}

figcaption b {
  color: var(--ink);
}

a.zoom {
  display: block;
  cursor: zoom-in;
}

.scroll-x {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ---------- Cards and tables ---------- */

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 18px 22px 0;
}

.card-head h3 {
  font-size: 17px;
}

.card-head p {
  margin: 0;
  color: var(--ink-3);
  font-size: 13.5px;
}

.card-head .tabs {
  margin-left: auto;
}

.card-body {
  padding: 12px 22px 18px;
}

.card-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 22px 14px;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 13.5px;
  line-height: 1.5;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.plain th,
.plain td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  text-align: center;
  white-space: nowrap;
}

.plain thead th {
  color: var(--ink-3);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.plain tbody th {
  font-weight: 600;
  text-align: left;
}

.plain th:first-child,
.plain td:first-child {
  padding-left: 0;
  text-align: left;
}

.plain tr:last-child th,
.plain tr:last-child td {
  border-bottom: 0;
}

.plain .grp th {
  padding-top: 16px;
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.mk {
  display: inline-block;
  width: 16px;
  height: 16px;
  vertical-align: -3px;
}

.part {
  color: var(--amber);
}

.plain td.yes {
  color: #15803d;
}

.plain td.no {
  color: #a3a8bd;
}

.plain tr.ours th,
.plain tr.ours td {
  background: var(--brand-soft);
  font-weight: 700;
}

.plain tr.ours th:first-child {
  padding-left: 12px;
  border-radius: 8px 0 0 8px;
}

.plain tr.ours td:last-child {
  border-radius: 0 8px 8px 0;
}

/* Heat tables */

.heat {
  min-width: 760px;
  border-spacing: 2px;
  table-layout: fixed;
}

.heat col.c-name {
  width: 168px;
}

.heat col.c-gap {
  width: 14px;
}

.heat th,
.heat td {
  padding: 0;
  font-size: 14.5px;
  text-align: center;
}

.heat thead th {
  padding: 4px 4px 6px;
  color: var(--ink-2);
  font-size: 12.5px;
  font-weight: 600;
}

.heat thead .lv th {
  padding-bottom: 2px;
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 700;
}

.heat thead .lv th span {
  color: var(--ink-3);
  font-weight: 500;
}

.heat tbody th {
  position: sticky;
  left: 0;
  z-index: 1;
  padding: 0 14px 0 0;
  background: #fff;
  font-size: 14.5px;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

.heat tbody th small {
  margin-left: 6px;
  color: var(--ink-3);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.heat td {
  height: 34px;
  border-radius: 5px;
  background: color-mix(in oklab, var(--heat-1) calc(var(--v) * 1%), var(--heat-0));
  color: var(--ink);
  cursor: default;
  transition: box-shadow 0.12s ease;
}

.heat td.z {
  color: var(--ink-3);
}

.heat td.best {
  font-weight: 750;
}

.heat td:hover {
  box-shadow: inset 0 0 0 2px var(--ink);
}

.heat .gap {
  background: none !important;
  box-shadow: none !important;
}

.scale {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
}

.scale i {
  display: block;
  width: 140px;
  height: 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: linear-gradient(to right in oklab, var(--heat-0), var(--heat-1));
}

.tabs {
  display: inline-flex;
  padding: 3px;
  border-radius: 10px;
  background: #ebedf8;
}

.tabs[hidden] {
  display: none;
}

.tabs button {
  padding: 6px 14px;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--ink-2);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.tabs button[aria-pressed="true"] {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(27, 32, 48, 0.14);
}

.pane-title {
  margin: 8px 0 6px;
  font-size: 14.5px;
}

.js .pane-title {
  display: none;
}

.pane + .pane {
  margin-top: 20px;
}

.js .pane + .pane {
  margin-top: 0;
}

/* Real-robot pips */

.pips {
  display: inline-flex;
  gap: 2px;
  margin-left: 10px;
  vertical-align: middle;
}

.pips i {
  width: 8px;
  height: 16px;
  border-radius: 2px;
  background: #e6e8f4;
}

.pips i.on {
  background: var(--brand);
}

.real td b {
  display: inline-block;
  min-width: 42px;
  font-weight: 650;
  text-align: right;
}

/* ---------- Findings ---------- */

.findings {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.findings.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.finding {
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.finding .num {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
  font-size: 30px;
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.035em;
}

.finding .num .to {
  color: var(--ink-3);
  font-size: 20px;
  font-weight: 500;
}

.finding .num small {
  flex-basis: 100%;
  margin-top: 4px;
  color: var(--ink-3);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
}

.finding h4 {
  margin-top: 12px;
  font-size: 16.5px;
  line-height: 1.35;
}

.finding p {
  margin: 6px 0 0;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.55;
}

@media (max-width: 900px) {
  .findings,
  .findings.two {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- Probes ---------- */

.probes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.probe {
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.probe h4 {
  margin-top: 10px;
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.probe p {
  margin: 6px 0 14px;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.55;
}

.probe figure {
  margin-top: auto;
}

@media (max-width: 900px) {
  .probes {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- ToolBook ---------- */

.sum {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1.1fr;
  gap: 12px;
  align-items: stretch;
  margin-top: 28px;
}

.sum .t {
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.sum .t b {
  display: block;
  font-size: 32px;
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.035em;
}

.sum .t strong {
  display: block;
  margin-top: 8px;
  font-size: 15px;
}

.sum .t span {
  display: block;
  margin-top: 2px;
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.45;
}

.sum .t.total {
  border-color: var(--ink);
  background: var(--bg-ink);
  color: #fff;
}

.sum .t.total span {
  color: #b9bfdc;
}

.sum .op {
  display: grid;
  place-items: center;
  color: var(--ink-3);
  font-size: 24px;
  font-weight: 500;
}

@media (max-width: 900px) {
  .sum {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
  .sum .op {
    height: 20px;
  }
}

.facts {
  max-width: 800px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.facts li {
  position: relative;
  padding: 0 0 0 24px;
  color: var(--ink-2);
  font-size: 15.5px;
}

.facts li + li {
  margin-top: 8px;
}

.facts li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
}

.facts li b {
  color: var(--ink);
}

/* ---------- Get started ---------- */

.start {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 28px;
  margin-top: 28px;
  align-items: start;
}

.code {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  background: var(--bg-ink);
  color: #e6e9fb;
  overflow: hidden;
}

.code pre {
  margin: 0;
  padding: 22px 24px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.75;
}

.code .c {
  color: #8d95bd;
}

.code .k {
  color: #a9b4ff;
}

.copy {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 5px 11px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.07);
  color: #d7dbf5;
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.copy:hover {
  background: rgba(255, 255, 255, 0.16);
}

.links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.links a {
  display: block;
  height: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.links a:hover {
  border-color: var(--brand);
  box-shadow: 0 4px 14px rgba(79, 95, 240, 0.12);
}

.links b {
  display: block;
  font-size: 15px;
}

.links span {
  display: block;
  margin-top: 2px;
  color: var(--ink-2);
  font-size: 13.5px;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .start {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .links {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- Footer ---------- */

footer {
  padding: 36px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.6;
}

footer .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: start;
}

footer img {
  width: 170px;
}

footer p {
  max-width: 640px;
  margin: 12px 0 0;
}

footer nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: right;
}

@media (max-width: 700px) {
  footer .wrap {
    grid-template-columns: minmax(0, 1fr);
  }
  footer nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px 18px;
    text-align: left;
  }
}

/* ---------- Tooltip ---------- */

.tip {
  position: fixed;
  z-index: 80;
  max-width: 260px;
  padding: 8px 11px;
  border-radius: 8px;
  background: var(--bg-ink);
  color: #fff;
  font-size: 12.5px;
  line-height: 1.4;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.1s ease, transform 0.1s ease;
  box-shadow: 0 6px 20px rgba(21, 25, 41, 0.28);
}

.tip.on {
  opacity: 1;
  transform: none;
}

.tip b {
  display: block;
  font-size: 15px;
}

.tip span {
  color: #b9bfdc;
}

/* ---------- Small screens ---------- */

@media (max-width: 700px) {
  section {
    padding: 56px 0;
  }
  .hero {
    padding-top: 32px;
  }
  .heat {
    min-width: 640px;
  }
  .heat col.c-name {
    width: 104px;
  }
  .heat col.c-gap {
    width: 8px;
  }
  .heat tbody th {
    padding-right: 6px;
    font-size: 13.5px;
    white-space: normal;
    line-height: 1.2;
  }
  .heat tbody th small {
    display: none;
  }
  .card-head,
  .card-body,
  .card-foot {
    padding-left: 16px;
    padding-right: 16px;
  }
  .card-head .tabs {
    margin-left: 0;
  }
  .code pre {
    padding: 48px 18px 20px;
    font-size: 13px;
  }
}

/* ---------- Authors ---------- */

.authors {
  max-width: 860px;
  margin: 18px auto 0;
  font-size: 16.5px;
  line-height: 1.75;
  text-wrap: balance;
}

.authors a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.authors a:hover {
  color: var(--brand-deep);
  text-decoration: underline;
}

.authors sup,
.byline sup {
  color: var(--brand-deep);
  font-weight: 700;
}

.byline {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-3);
}

/* ---------- Live counts on the buttons ---------- */

.count {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 2px;
  padding-left: 10px;
  border-left: 1px solid color-mix(in srgb, currentColor 28%, transparent);
  font-size: 0.93em;
  font-variant-numeric: tabular-nums;
}

/* The count keeps its space while it loads so the buttons do not shift. */
.count.is-pending {
  visibility: hidden;
}

.count[hidden] {
  display: none;
}

.btn .count svg {
  width: 14px;
  height: 14px;
}

@media (max-width: 560px) {
  .topbar .count {
    display: none;
  }
}

/* Author entries: name, then a small envelope for the email */

.author {
  white-space: nowrap;
}

.authors .author > span {
  color: var(--ink);
  font-weight: 600;
}

.authors a.mail {
  display: inline-block;
  margin-left: 4px;
  color: var(--ink-3);
  vertical-align: -2px;
}

.authors a.mail svg {
  display: block;
  width: 15px;
  height: 15px;
}

.authors a.mail:hover {
  color: var(--brand-deep);
}

.affils {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px 20px;
  max-width: 860px;
  margin: 10px auto 0;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.6;
}

.affils span {
  white-space: nowrap;
}

.affils sup {
  margin-right: 2px;
  color: var(--brand-deep);
  font-weight: 700;
}

.hero-sum.after-video {
  margin-top: 22px;
}