/* ---------- opening ---------- */
.lede {
  font-size: 1.12rem;
  color: var(--text-body);
  max-width: 34em;
  margin: 1rem auto 0;
  text-wrap: pretty;
}
.lede + .lede {
  margin-top: 0.6rem;
}
.path {
  list-style: none;
  padding: 0;
  margin: 1.6rem auto 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.1rem;
  text-align: left;
}
.path li {
  border-top: 2px solid var(--text);
  padding-top: 0.6rem;
  min-width: 0;
}
.path b {
  display: block;
  font: 600 1.25rem/1.15 var(--font-display);
  color: var(--text);
  margin-bottom: 0.35rem;
}
.path span {
  display: block;
  font: 0.82rem/1.5 var(--font-sans);
  color: var(--text-body);
}
@media (max-width: 760px) {
  .path {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 420px) {
  .path {
    grid-template-columns: 1fr;
  }
}
.table-note.center {
  text-align: center;
}

/* ---------- scoreboards ---------- */
table.scoreboard {
  width: 100%;
  max-width: 38rem;
  margin: 1.75rem auto 0.5rem;
  border-collapse: collapse;
  font-variant-numeric: lining-nums tabular-nums;
}
table.scoreboard caption {
  caption-side: bottom;
  font: 0.8rem/1.5 var(--font-sans);
  color: var(--text-muted);
  padding-top: 0.6rem;
  text-align: left;
}
table.scoreboard thead th {
  font: 600 0.78rem/1.3 var(--font-sans);
  color: var(--text-muted);
  text-align: left;
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--border);
  background: none;
}
table.scoreboard tbody th {
  font: 600 1rem/1.25 var(--font-serif);
  color: var(--text);
  text-align: left;
  padding: 0.7rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}
table.scoreboard tbody th small {
  display: block;
  font: 0.75rem/1.4 var(--font-sans);
  color: var(--text-muted);
  font-weight: 400;
}
table.scoreboard td {
  padding: 0.7rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}
table.scoreboard td b {
  font: 600 2.3rem/1 var(--font-display);
  color: var(--text);
}
table.scoreboard td small {
  font: 0.85rem var(--font-sans);
  color: var(--text-muted);
  margin-left: 0.1rem;
}
table.scoreboard.delta td:last-child b {
  font-size: 1.6rem;
}

.numbers.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 30rem;
}
.numbers.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 760px) {
  .numbers.three {
    grid-template-columns: 1fr;
  }
  .numbers.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- parts and steps ---------- */
.parts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 1.25rem 0 1.75rem;
  padding: 0;
  list-style: none;
}
.parts.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.parts li {
  border-top: 1px solid var(--border);
  padding-top: 0.65rem;
  min-width: 0;
}
.parts b {
  display: block;
  font: 600 1.15rem/1.2 var(--font-display);
  color: var(--text);
  margin-bottom: 0.35rem;
}
.parts span {
  display: block;
  font: 0.85rem/1.5 var(--font-sans);
  color: var(--text-body);
}
@media (max-width: 860px) {
  .parts.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  .parts {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 480px) {
  .parts.four {
    grid-template-columns: 1fr;
  }
}

.steps {
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 1.5rem;
  display: grid;
  gap: 0.75rem;
}
.steps li {
  display: grid;
  grid-template-columns: 9.5rem minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
  border-top: 1px solid var(--border);
  padding-top: 0.65rem;
}
.steps b {
  font: 600 0.82rem/1.4 var(--font-sans);
  color: var(--text);
}
.steps span {
  color: var(--text-body);
}
.steps.ticks b {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.78rem;
}
.steps li.hit b,
.steps li.hit span {
  background: linear-gradient(transparent 58%, var(--marker) 58%);
  color: var(--text);
}
@media (max-width: 560px) {
  .steps li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

.abba-result {
  font-size: 1.02rem;
  border-left: 2px solid var(--text);
  padding-left: 1rem;
  color: var(--text-body);
}
table.robots td,
table.robots th {
  white-space: normal;
}
.limits li {
  margin: 0.6rem 0;
}

/* ---------- notebook + what I learned ---------- */
.notes-grid {
  display: grid;
  gap: 1.75rem;
}
.notes-intro,
.notes-learned {
  min-width: 0;
}
.notes-book .steno-wrap {
  padding: 0;
}
.learned-title {
  margin-top: 0;
}
[data-sec="notes"][data-pick="A"] .notes-grid {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: start;
  column-gap: 3rem;
}
[data-sec="notes"][data-pick="A"] .notes-intro {
  grid-column: 1 / -1;
  max-width: calc(var(--col) - 2 * var(--gutter));
}
[data-sec="notes"][data-pick="B"] .notes-grid {
  max-width: calc(var(--col) - 2 * var(--gutter));
  margin: 0 auto;
}
@media (max-width: 1000px) {
  [data-sec="notes"][data-pick="A"] .notes-grid {
    grid-template-columns: 1fr;
    max-width: calc(var(--col) - 2 * var(--gutter));
    margin: 0 auto;
  }
}
.learned-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 2rem;
  margin: 1rem 0 1.5rem;
}
.learned-grid h4 {
  font: 600 1.15rem/1.2 var(--font-display);
  margin-bottom: 0.3rem;
}
.learned-grid p {
  font-size: 0.95rem;
}
@media (max-width: 640px) {
  .learned-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- fixes and the built-with strip ---------- */
[hidden] { display: none !important; }
.col { max-width: calc(var(--col) - 2 * var(--gutter)); margin-inline: auto; }
.fig { margin-block: 1.5rem; }
dl.learned + p { margin-top: 1.25rem; }
.built { list-style: none; padding: 0; margin: 1.25rem auto 0; max-width: 46rem; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem; }
.built a { display: inline-flex; align-items: baseline; gap: 0.35rem; font: 0.74rem/1.2 var(--font-mono); color: var(--text-body); border: 1px solid var(--border); border-radius: 999px; padding: 0.3rem 0.65rem; background: var(--surface); }
.built a:hover { border-color: var(--text); color: var(--text); }
.built i { font-style: normal; font-family: var(--font-sans); font-weight: 600; font-size: 0.7rem; color: var(--text); }
.built li:nth-child(-n+3) a { border-color: var(--text-subtle); }


/* Match the downloaded Claude artifact's document typography and measures. */
:root { --col:56rem; --wide:72rem; }
body { font:14px -apple-system,BlinkMacSystemFont,sans-serif; }
.masthead { padding:3.5rem 0 1.5rem; }
.masthead h1 { font-size:2.6rem; }
.r3-bleed { width:100%; max-width:var(--wide); margin-inline:auto; padding-inline:var(--gutter); }
.r3-paper-summary p,.r3-paper-summary li,.r3-view-guide p {font-size:inherit;line-height:1.65;}
.intro-comparison { margin:0 auto; }
.intro-comparison .media {position:relative;}
.intro-comparison video {display:block;width:100%;height:auto;}
.intro-labels {display:grid;grid-template-columns:1fr 1fr;background:#202525;color:white;font:600 .76rem/1.4 var(--font-sans);}
.intro-labels span {padding:.55rem .8rem;}
.intro-labels span+span {border-left:1px solid #555;}
.intro-comparison figcaption {max-width:var(--col);margin:.7rem auto 0;font:.8rem/1.5 var(--font-sans);color:var(--text-muted);}
@media(max-width:640px){.masthead{padding-top:1.75rem;}.masthead h1{font-size:2rem;}.intro-labels{font-size:.65rem;}.intro-labels span{padding:.4rem;}}

/* Methodology heading replaces the full-width opening divider. */
.masthead .r3-paper-summary { border-bottom: 0; }
.methodology-heading { text-align: left; font: 600 1.6rem/1.2 var(--font-display); margin: 1.2rem 0 0; }
.methodology-heading + .path { margin-top: 1rem; }