/* Bare-Metal Ada on the ESP32-S3 -- shared stylesheet.
   Light and dark, one set of custom properties, no JavaScript. */

:root {
  --bg:        #fbfbf9;
  --panel:     #f3f2ee;
  --fg:        #1d1f21;
  --fg-muted:  #5c6066;
  --fg-faint:  #8b9096;
  --rule:      #e0dfd9;
  --rule-soft: #ebeae5;
  --accent:    #9a3412;
  --accent-bg: #fdf1ea;
  --code-bg:   #f4f3ef;
  --code-fg:   #24292f;
  --note-bg:   #f1f5f9;
  --note-edge: #64748b;
  --warn-bg:   #fdf4e7;
  --warn-edge: #b45309;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #16181c;
    --panel:     #1c1f24;
    --fg:        #e3e5e8;
    --fg-muted:  #a2a8b0;
    --fg-faint:  #767d86;
    --rule:      #2b2f36;
    --rule-soft: #23262c;
    --accent:    #f0a882;
    --accent-bg: #2a1d17;
    --code-bg:   #1b1e23;
    --code-fg:   #dfe2e6;
    --note-bg:   #1a2028;
    --note-edge: #7c8ba1;
    --warn-bg:   #241d13;
    --warn-edge: #d08b2c;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---- masthead ---- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
}
.masthead-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
}
.masthead-inner a.brand {
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.masthead-inner a.brand:hover { color: var(--accent); }
.masthead .tagline {
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- layout ---- */

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.4rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

/* ---- sidebar ---- */

.toc {
  position: sticky;
  top: 2rem;
  font-size: 0.88rem;
}
.toc h2 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--fg-faint);
  margin: 0 0 0.7rem;
  font-weight: 650;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.toc li { counter-increment: step; margin: 0; }
.toc a {
  display: block;
  padding: 0.3rem 0.55rem 0.3rem 2.1rem;
  text-indent: -1.55rem;
  color: var(--fg-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
}
.toc a::before {
  content: counter(step, decimal-leading-zero);
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.78em;
  margin-right: 0.6rem;
}
.toc a:hover { color: var(--fg); background: var(--rule-soft); }
.toc li.current > a {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--accent-bg);
}
.toc li.current > a::before { color: var(--accent); }
.toc .home {
  display: block;
  margin-bottom: 1.1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule);
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.toc .home:hover { color: var(--accent); }

/* ---- article ---- */

main { min-width: 0; max-width: 44rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: 2.05rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 0.85rem;
  font-weight: 680;
}
h1 code { font-size: 0.92em; background: none; padding: 0; }

.lede {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0 0 2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

h2 {
  font-size: 1.24rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.7rem;
  font-weight: 650;
}

p, ul, ol, table { margin: 0 0 1.1rem; }
li { margin: 0.28rem 0; }
ul, ol { padding-left: 1.4rem; }

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--code-bg);
  padding: 0.12em 0.34em;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.3rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.845rem;
  white-space: pre;
}

kbd {
  font-family: var(--mono);
  font-size: 0.8em;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.08em 0.4em;
  background: var(--panel);
}

.table-scroll { overflow-x: auto; margin: 0 0 1.3rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.8rem 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
th {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--fg-faint);
  border-bottom: 1px solid var(--rule);
  font-weight: 650;
}
td code { font-size: 0.85em; }

/* ---- callouts ---- */

p.note, p.warn {
  padding: 0.85rem 1.05rem;
  border-left: 3px solid;
  border-radius: 0 5px 5px 0;
  font-size: 0.95rem;
  margin: 0 0 1.3rem;
}
p.note { background: var(--note-bg); border-color: var(--note-edge); }
p.warn { background: var(--warn-bg); border-color: var(--warn-edge); }

p.next-hint {
  color: var(--fg-faint);
  font-style: italic;
  font-size: 0.95rem;
}

/* ---- pager ---- */

.pager-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.84rem;
  margin-bottom: 1.6rem;
}
.pager-top a { color: var(--fg-muted); text-decoration: none; }
.pager-top a:hover { color: var(--accent); }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3.2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: block;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  text-decoration: none;
  color: var(--fg);
  background: var(--panel);
}
.pager a:hover { border-color: var(--accent); }
.pager .dir {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-faint);
  margin-bottom: 0.18rem;
}
.pager .name { font-weight: 600; font-size: 0.96rem; line-height: 1.3; }
.pager .next { text-align: right; grid-column: 2; }
.pager .prev { grid-column: 1; }

/* ---- index page ---- */

.index-list { list-style: none; padding: 0; counter-reset: step; margin: 0; }
.index-list li {
  counter-increment: step;
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.95rem 0;
  margin: 0;
}
.index-list a {
  font-size: 1.06rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
}
.index-list a:hover { color: var(--accent); }
.index-list a::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.78em;
  font-weight: 400;
  color: var(--fg-faint);
  margin-right: 0.85rem;
}
.index-list p { margin: 0.2rem 0 0 2.65rem; color: var(--fg-muted); font-size: 0.95rem; }

.start-cta {
  display: inline-block;
  margin: 0.4rem 0 2rem;
  padding: 0.6rem 1.15rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}
.start-cta:hover { opacity: 0.88; }

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding-top: 1.2rem;
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- narrow screens ---- */

@media (max-width: 860px) {
  body { font-size: 16px; }
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    padding: 1.6rem 1.15rem 3rem;
  }
  .toc {
    position: static;
    background: var(--panel);
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 1rem 1.1rem;
  }
  main { max-width: none; }
  h1 { font-size: 1.65rem; }
  .lede { font-size: 1.03rem; }
  .pager { grid-template-columns: 1fr; }
  .pager .next, .pager .prev { grid-column: 1; text-align: left; }
}
/* Bare-Metal Ada on the ESP32-S3 -- shared stylesheet.
   Light and dark, one set of custom properties, no JavaScript. */

:root {
  --bg:        #fbfbf9;
  --panel:     #f3f2ee;
  --fg:        #1d1f21;
  --fg-muted:  #5c6066;
  --fg-faint:  #8b9096;
  --rule:      #e0dfd9;
  --rule-soft: #ebeae5;
  --accent:    #9a3412;
  --accent-bg: #fdf1ea;
  --code-bg:   #f4f3ef;
  --code-fg:   #24292f;
  --note-bg:   #f1f5f9;
  --note-edge: #64748b;
  --warn-bg:   #fdf4e7;
  --warn-edge: #b45309;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #16181c;
    --panel:     #1c1f24;
    --fg:        #e3e5e8;
    --fg-muted:  #a2a8b0;
    --fg-faint:  #767d86;
    --rule:      #2b2f36;
    --rule-soft: #23262c;
    --accent:    #f0a882;
    --accent-bg: #2a1d17;
    --code-bg:   #1b1e23;
    --code-fg:   #dfe2e6;
    --note-bg:   #1a2028;
    --note-edge: #7c8ba1;
    --warn-bg:   #241d13;
    --warn-edge: #d08b2c;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---- masthead ---- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
}
.masthead-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
}
.masthead-inner a.brand {
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.masthead-inner a.brand:hover { color: var(--accent); }
.masthead .tagline {
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- layout ---- */

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.4rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

/* ---- sidebar ---- */

.toc {
  position: sticky;
  top: 2rem;
  font-size: 0.88rem;
}
.toc h2 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--fg-faint);
  margin: 0 0 0.7rem;
  font-weight: 650;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.toc li { counter-increment: step; margin: 0; }
.toc a {
  display: block;
  padding: 0.3rem 0.55rem 0.3rem 2.1rem;
  text-indent: -1.55rem;
  color: var(--fg-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
}
.toc a::before {
  content: counter(step, decimal-leading-zero);
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.78em;
  margin-right: 0.6rem;
}
.toc a:hover { color: var(--fg); background: var(--rule-soft); }
.toc li.current > a {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--accent-bg);
}
.toc li.current > a::before { color: var(--accent); }
.toc .home {
  display: block;
  margin-bottom: 1.1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule);
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.toc .home:hover { color: var(--accent); }

/* ---- article ---- */

main { min-width: 0; max-width: 44rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: 2.05rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 0.85rem;
  font-weight: 680;
}
h1 code { font-size: 0.92em; background: none; padding: 0; }

.lede {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0 0 2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

h2 {
  font-size: 1.24rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.7rem;
  font-weight: 650;
}

p, ul, ol, table { margin: 0 0 1.1rem; }
li { margin: 0.28rem 0; }
ul, ol { padding-left: 1.4rem; }

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--code-bg);
  padding: 0.12em 0.34em;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.3rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.845rem;
  white-space: pre;
}

kbd {
  font-family: var(--mono);
  font-size: 0.8em;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.08em 0.4em;
  background: var(--panel);
}

.table-scroll { overflow-x: auto; margin: 0 0 1.3rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.8rem 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
th {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--fg-faint);
  border-bottom: 1px solid var(--rule);
  font-weight: 650;
}
td code { font-size: 0.85em; }

/* ---- callouts ---- */

p.note, p.warn {
  padding: 0.85rem 1.05rem;
  border-left: 3px solid;
  border-radius: 0 5px 5px 0;
  font-size: 0.95rem;
  margin: 0 0 1.3rem;
}
p.note { background: var(--note-bg); border-color: var(--note-edge); }
p.warn { background: var(--warn-bg); border-color: var(--warn-edge); }

p.next-hint {
  color: var(--fg-faint);
  font-style: italic;
  font-size: 0.95rem;
}

/* ---- pager ---- */

.pager-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.84rem;
  margin-bottom: 1.6rem;
}
.pager-top a { color: var(--fg-muted); text-decoration: none; }
.pager-top a:hover { color: var(--accent); }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3.2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: block;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  text-decoration: none;
  color: var(--fg);
  background: var(--panel);
}
.pager a:hover { border-color: var(--accent); }
.pager .dir {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-faint);
  margin-bottom: 0.18rem;
}
.pager .name { font-weight: 600; font-size: 0.96rem; line-height: 1.3; }
.pager .next { text-align: right; grid-column: 2; }
.pager .prev { grid-column: 1; }

/* ---- index page ---- */

.index-list { list-style: none; padding: 0; counter-reset: step; margin: 0; }
.index-list li {
  counter-increment: step;
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.95rem 0;
  margin: 0;
}
.index-list a {
  font-size: 1.06rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
}
.index-list a:hover { color: var(--accent); }
.index-list a::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.78em;
  font-weight: 400;
  color: var(--fg-faint);
  margin-right: 0.85rem;
}
.index-list p { margin: 0.2rem 0 0 2.65rem; color: var(--fg-muted); font-size: 0.95rem; }

.start-cta {
  display: inline-block;
  margin: 0.4rem 0 2rem;
  padding: 0.6rem 1.15rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}
.start-cta:hover { opacity: 0.88; }

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding-top: 1.2rem;
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- narrow screens ---- */

@media (max-width: 860px) {
  body { font-size: 16px; }
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    padding: 1.6rem 1.15rem 3rem;
  }
  .toc {
    position: static;
    background: var(--panel);
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 1rem 1.1rem;
  }
  main { max-width: none; }
  h1 { font-size: 1.65rem; }
  .lede { font-size: 1.03rem; }
  .pager { grid-template-columns: 1fr; }
  .pager .next, .pager .prev { grid-column: 1; text-align: left; }
}
/* Bare-Metal Ada on the ESP32-S3 -- shared stylesheet.
   Light and dark, one set of custom properties, no JavaScript. */

:root {
  --bg:        #fbfbf9;
  --panel:     #f3f2ee;
  --fg:        #1d1f21;
  --fg-muted:  #5c6066;
  --fg-faint:  #8b9096;
  --rule:      #e0dfd9;
  --rule-soft: #ebeae5;
  --accent:    #9a3412;
  --accent-bg: #fdf1ea;
  --code-bg:   #f4f3ef;
  --code-fg:   #24292f;
  --note-bg:   #f1f5f9;
  --note-edge: #64748b;
  --warn-bg:   #fdf4e7;
  --warn-edge: #b45309;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #16181c;
    --panel:     #1c1f24;
    --fg:        #e3e5e8;
    --fg-muted:  #a2a8b0;
    --fg-faint:  #767d86;
    --rule:      #2b2f36;
    --rule-soft: #23262c;
    --accent:    #f0a882;
    --accent-bg: #2a1d17;
    --code-bg:   #1b1e23;
    --code-fg:   #dfe2e6;
    --note-bg:   #1a2028;
    --note-edge: #7c8ba1;
    --warn-bg:   #241d13;
    --warn-edge: #d08b2c;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---- masthead ---- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
}
.masthead-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
}
.masthead-inner a.brand {
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.masthead-inner a.brand:hover { color: var(--accent); }
.masthead .tagline {
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- layout ---- */

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.4rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

/* ---- sidebar ---- */

.toc {
  position: sticky;
  top: 2rem;
  font-size: 0.88rem;
}
.toc h2 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--fg-faint);
  margin: 0 0 0.7rem;
  font-weight: 650;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.toc li { counter-increment: step; margin: 0; }
.toc a {
  display: block;
  padding: 0.3rem 0.55rem 0.3rem 2.1rem;
  text-indent: -1.55rem;
  color: var(--fg-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
}
.toc a::before {
  content: counter(step, decimal-leading-zero);
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.78em;
  margin-right: 0.6rem;
}
.toc a:hover { color: var(--fg); background: var(--rule-soft); }
.toc li.current > a {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--accent-bg);
}
.toc li.current > a::before { color: var(--accent); }
.toc .home {
  display: block;
  margin-bottom: 1.1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule);
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.toc .home:hover { color: var(--accent); }

/* ---- article ---- */

main { min-width: 0; max-width: 44rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: 2.05rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 0.85rem;
  font-weight: 680;
}
h1 code { font-size: 0.92em; background: none; padding: 0; }

.lede {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0 0 2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

h2 {
  font-size: 1.24rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.7rem;
  font-weight: 650;
}

p, ul, ol, table { margin: 0 0 1.1rem; }
li { margin: 0.28rem 0; }
ul, ol { padding-left: 1.4rem; }

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--code-bg);
  padding: 0.12em 0.34em;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.3rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.845rem;
  white-space: pre;
}

kbd {
  font-family: var(--mono);
  font-size: 0.8em;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.08em 0.4em;
  background: var(--panel);
}

.table-scroll { overflow-x: auto; margin: 0 0 1.3rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.8rem 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
th {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--fg-faint);
  border-bottom: 1px solid var(--rule);
  font-weight: 650;
}
td code { font-size: 0.85em; }

/* ---- callouts ---- */

p.note, p.warn {
  padding: 0.85rem 1.05rem;
  border-left: 3px solid;
  border-radius: 0 5px 5px 0;
  font-size: 0.95rem;
  margin: 0 0 1.3rem;
}
p.note { background: var(--note-bg); border-color: var(--note-edge); }
p.warn { background: var(--warn-bg); border-color: var(--warn-edge); }

p.next-hint {
  color: var(--fg-faint);
  font-style: italic;
  font-size: 0.95rem;
}

/* ---- pager ---- */

.pager-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.84rem;
  margin-bottom: 1.6rem;
}
.pager-top a { color: var(--fg-muted); text-decoration: none; }
.pager-top a:hover { color: var(--accent); }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3.2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: block;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  text-decoration: none;
  color: var(--fg);
  background: var(--panel);
}
.pager a:hover { border-color: var(--accent); }
.pager .dir {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-faint);
  margin-bottom: 0.18rem;
}
.pager .name { font-weight: 600; font-size: 0.96rem; line-height: 1.3; }
.pager .next { text-align: right; grid-column: 2; }
.pager .prev { grid-column: 1; }

/* ---- index page ---- */

.index-list { list-style: none; padding: 0; counter-reset: step; margin: 0; }
.index-list li {
  counter-increment: step;
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.95rem 0;
  margin: 0;
}
.index-list a {
  font-size: 1.06rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
}
.index-list a:hover { color: var(--accent); }
.index-list a::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.78em;
  font-weight: 400;
  color: var(--fg-faint);
  margin-right: 0.85rem;
}
.index-list p { margin: 0.2rem 0 0 2.65rem; color: var(--fg-muted); font-size: 0.95rem; }

.start-cta {
  display: inline-block;
  margin: 0.4rem 0 2rem;
  padding: 0.6rem 1.15rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}
.start-cta:hover { opacity: 0.88; }

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding-top: 1.2rem;
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- narrow screens ---- */

@media (max-width: 860px) {
  body { font-size: 16px; }
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    padding: 1.6rem 1.15rem 3rem;
  }
  .toc {
    position: static;
    background: var(--panel);
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 1rem 1.1rem;
  }
  main { max-width: none; }
  h1 { font-size: 1.65rem; }
  .lede { font-size: 1.03rem; }
  .pager { grid-template-columns: 1fr; }
  .pager .next, .pager .prev { grid-column: 1; text-align: left; }
}
/* Bare-Metal Ada on the ESP32-S3 -- shared stylesheet.
   Light and dark, one set of custom properties, no JavaScript. */

:root {
  --bg:        #fbfbf9;
  --panel:     #f3f2ee;
  --fg:        #1d1f21;
  --fg-muted:  #5c6066;
  --fg-faint:  #8b9096;
  --rule:      #e0dfd9;
  --rule-soft: #ebeae5;
  --accent:    #9a3412;
  --accent-bg: #fdf1ea;
  --code-bg:   #f4f3ef;
  --code-fg:   #24292f;
  --note-bg:   #f1f5f9;
  --note-edge: #64748b;
  --warn-bg:   #fdf4e7;
  --warn-edge: #b45309;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #16181c;
    --panel:     #1c1f24;
    --fg:        #e3e5e8;
    --fg-muted:  #a2a8b0;
    --fg-faint:  #767d86;
    --rule:      #2b2f36;
    --rule-soft: #23262c;
    --accent:    #f0a882;
    --accent-bg: #2a1d17;
    --code-bg:   #1b1e23;
    --code-fg:   #dfe2e6;
    --note-bg:   #1a2028;
    --note-edge: #7c8ba1;
    --warn-bg:   #241d13;
    --warn-edge: #d08b2c;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---- masthead ---- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
}
.masthead-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
}
.masthead-inner a.brand {
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.masthead-inner a.brand:hover { color: var(--accent); }
.masthead .tagline {
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- layout ---- */

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.4rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

/* ---- sidebar ---- */

.toc {
  position: sticky;
  top: 2rem;
  font-size: 0.88rem;
}
.toc h2 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--fg-faint);
  margin: 0 0 0.7rem;
  font-weight: 650;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.toc li { counter-increment: step; margin: 0; }
.toc a {
  display: block;
  padding: 0.3rem 0.55rem 0.3rem 2.1rem;
  text-indent: -1.55rem;
  color: var(--fg-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
}
.toc a::before {
  content: counter(step, decimal-leading-zero);
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.78em;
  margin-right: 0.6rem;
}
.toc a:hover { color: var(--fg); background: var(--rule-soft); }
.toc li.current > a {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--accent-bg);
}
.toc li.current > a::before { color: var(--accent); }
.toc .home {
  display: block;
  margin-bottom: 1.1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule);
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.toc .home:hover { color: var(--accent); }

/* ---- article ---- */

main { min-width: 0; max-width: 44rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: 2.05rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 0.85rem;
  font-weight: 680;
}
h1 code { font-size: 0.92em; background: none; padding: 0; }

.lede {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0 0 2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

h2 {
  font-size: 1.24rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.7rem;
  font-weight: 650;
}

p, ul, ol, table { margin: 0 0 1.1rem; }
li { margin: 0.28rem 0; }
ul, ol { padding-left: 1.4rem; }

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--code-bg);
  padding: 0.12em 0.34em;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.3rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.845rem;
  white-space: pre;
}

kbd {
  font-family: var(--mono);
  font-size: 0.8em;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.08em 0.4em;
  background: var(--panel);
}

.table-scroll { overflow-x: auto; margin: 0 0 1.3rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.8rem 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
th {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--fg-faint);
  border-bottom: 1px solid var(--rule);
  font-weight: 650;
}
td code { font-size: 0.85em; }

/* ---- callouts ---- */

p.note, p.warn {
  padding: 0.85rem 1.05rem;
  border-left: 3px solid;
  border-radius: 0 5px 5px 0;
  font-size: 0.95rem;
  margin: 0 0 1.3rem;
}
p.note { background: var(--note-bg); border-color: var(--note-edge); }
p.warn { background: var(--warn-bg); border-color: var(--warn-edge); }

p.next-hint {
  color: var(--fg-faint);
  font-style: italic;
  font-size: 0.95rem;
}

/* ---- pager ---- */

.pager-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.84rem;
  margin-bottom: 1.6rem;
}
.pager-top a { color: var(--fg-muted); text-decoration: none; }
.pager-top a:hover { color: var(--accent); }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3.2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: block;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  text-decoration: none;
  color: var(--fg);
  background: var(--panel);
}
.pager a:hover { border-color: var(--accent); }
.pager .dir {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-faint);
  margin-bottom: 0.18rem;
}
.pager .name { font-weight: 600; font-size: 0.96rem; line-height: 1.3; }
.pager .next { text-align: right; grid-column: 2; }
.pager .prev { grid-column: 1; }

/* ---- index page ---- */

.index-list { list-style: none; padding: 0; counter-reset: step; margin: 0; }
.index-list li {
  counter-increment: step;
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.95rem 0;
  margin: 0;
}
.index-list a {
  font-size: 1.06rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
}
.index-list a:hover { color: var(--accent); }
.index-list a::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.78em;
  font-weight: 400;
  color: var(--fg-faint);
  margin-right: 0.85rem;
}
.index-list p { margin: 0.2rem 0 0 2.65rem; color: var(--fg-muted); font-size: 0.95rem; }

.start-cta {
  display: inline-block;
  margin: 0.4rem 0 2rem;
  padding: 0.6rem 1.15rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}
.start-cta:hover { opacity: 0.88; }

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding-top: 1.2rem;
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- narrow screens ---- */

@media (max-width: 860px) {
  body { font-size: 16px; }
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    padding: 1.6rem 1.15rem 3rem;
  }
  .toc {
    position: static;
    background: var(--panel);
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 1rem 1.1rem;
  }
  main { max-width: none; }
  h1 { font-size: 1.65rem; }
  .lede { font-size: 1.03rem; }
  .pager { grid-template-columns: 1fr; }
  .pager .next, .pager .prev { grid-column: 1; text-align: left; }
}
/* Bare-Metal Ada on the ESP32-S3 -- shared stylesheet.
   Light and dark, one set of custom properties, no JavaScript. */

:root {
  --bg:        #fbfbf9;
  --panel:     #f3f2ee;
  --fg:        #1d1f21;
  --fg-muted:  #5c6066;
  --fg-faint:  #8b9096;
  --rule:      #e0dfd9;
  --rule-soft: #ebeae5;
  --accent:    #9a3412;
  --accent-bg: #fdf1ea;
  --code-bg:   #f4f3ef;
  --code-fg:   #24292f;
  --note-bg:   #f1f5f9;
  --note-edge: #64748b;
  --warn-bg:   #fdf4e7;
  --warn-edge: #b45309;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:        #16181c;
    --panel:     #1c1f24;
    --fg:        #e3e5e8;
    --fg-muted:  #a2a8b0;
    --fg-faint:  #767d86;
    --rule:      #2b2f36;
    --rule-soft: #23262c;
    --accent:    #f0a882;
    --accent-bg: #2a1d17;
    --code-bg:   #1b1e23;
    --code-fg:   #dfe2e6;
    --note-bg:   #1a2028;
    --note-edge: #7c8ba1;
    --warn-bg:   #241d13;
    --warn-edge: #d08b2c;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

/* ---- masthead ---- */

.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
}
.masthead-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
}
.masthead-inner a.brand {
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.masthead-inner a.brand:hover { color: var(--accent); }
.masthead .tagline {
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- layout ---- */

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.4rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

/* ---- sidebar ---- */

.toc {
  position: sticky;
  top: 2rem;
  font-size: 0.88rem;
}
.toc h2 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--fg-faint);
  margin: 0 0 0.7rem;
  font-weight: 650;
}
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.toc li { counter-increment: step; margin: 0; }
.toc a {
  display: block;
  padding: 0.3rem 0.55rem 0.3rem 2.1rem;
  text-indent: -1.55rem;
  color: var(--fg-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 3px 3px 0;
}
.toc a::before {
  content: counter(step, decimal-leading-zero);
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.78em;
  margin-right: 0.6rem;
}
.toc a:hover { color: var(--fg); background: var(--rule-soft); }
.toc li.current > a {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
  background: var(--accent-bg);
}
.toc li.current > a::before { color: var(--accent); }
.toc .home {
  display: block;
  margin-bottom: 1.1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule);
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.toc .home:hover { color: var(--accent); }

/* ---- article ---- */

main { min-width: 0; max-width: 44rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: 2.05rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 0.85rem;
  font-weight: 680;
}
h1 code { font-size: 0.92em; background: none; padding: 0; }

.lede {
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--fg-muted);
  margin: 0 0 2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

h2 {
  font-size: 1.24rem;
  letter-spacing: -0.01em;
  margin: 2.4rem 0 0.7rem;
  font-weight: 650;
}

p, ul, ol, table { margin: 0 0 1.1rem; }
li { margin: 0.28rem 0; }
ul, ol { padding-left: 1.4rem; }

code {
  font-family: var(--mono);
  font-size: 0.87em;
  background: var(--code-bg);
  padding: 0.12em 0.34em;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  color: var(--code-fg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.95rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.3rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.845rem;
  white-space: pre;
}

kbd {
  font-family: var(--mono);
  font-size: 0.8em;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.08em 0.4em;
  background: var(--panel);
}

.table-scroll { overflow-x: auto; margin: 0 0 1.3rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.8rem 0.55rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
th {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--fg-faint);
  border-bottom: 1px solid var(--rule);
  font-weight: 650;
}
td code { font-size: 0.85em; }

/* ---- callouts ---- */

p.note, p.warn {
  padding: 0.85rem 1.05rem;
  border-left: 3px solid;
  border-radius: 0 5px 5px 0;
  font-size: 0.95rem;
  margin: 0 0 1.3rem;
}
p.note { background: var(--note-bg); border-color: var(--note-edge); }
p.warn { background: var(--warn-bg); border-color: var(--warn-edge); }

p.next-hint {
  color: var(--fg-faint);
  font-style: italic;
  font-size: 0.95rem;
}

/* ---- pager ---- */

.pager-top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.84rem;
  margin-bottom: 1.6rem;
}
.pager-top a { color: var(--fg-muted); text-decoration: none; }
.pager-top a:hover { color: var(--accent); }

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3.2rem;
  padding-top: 1.8rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: block;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  text-decoration: none;
  color: var(--fg);
  background: var(--panel);
}
.pager a:hover { border-color: var(--accent); }
.pager .dir {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-faint);
  margin-bottom: 0.18rem;
}
.pager .name { font-weight: 600; font-size: 0.96rem; line-height: 1.3; }
.pager .next { text-align: right; grid-column: 2; }
.pager .prev { grid-column: 1; }

/* ---- index page ---- */

.index-list { list-style: none; padding: 0; counter-reset: step; margin: 0; }
.index-list li {
  counter-increment: step;
  border-bottom: 1px solid var(--rule-soft);
  padding: 0.95rem 0;
  margin: 0;
}
.index-list a {
  font-size: 1.06rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
}
.index-list a:hover { color: var(--accent); }
.index-list a::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.78em;
  font-weight: 400;
  color: var(--fg-faint);
  margin-right: 0.85rem;
}
.index-list p { margin: 0.2rem 0 0 2.65rem; color: var(--fg-muted); font-size: 0.95rem; }

.start-cta {
  display: inline-block;
  margin: 0.4rem 0 2rem;
  padding: 0.6rem 1.15rem;
  background: var(--accent);
  color: var(--bg);
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}
.start-cta:hover { opacity: 0.88; }

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding-top: 1.2rem;
  color: var(--fg-faint);
  font-size: 0.82rem;
}

/* ---- narrow screens ---- */

@media (max-width: 860px) {
  body { font-size: 16px; }
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    padding: 1.6rem 1.15rem 3rem;
  }
  .toc {
    position: static;
    background: var(--panel);
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 1rem 1.1rem;
  }
  main { max-width: none; }
  h1 { font-size: 1.65rem; }
  .lede { font-size: 1.03rem; }
  .pager { grid-template-columns: 1fr; }
  .pager .next, .pager .prev { grid-column: 1; text-align: left; }
}