/* ---------- IBM Carbon-ish tokens, Linux man-page vibes ---------- */
:root {
  /* Carbon dark grays */
  --bg:        #161616; /* gray-100 */
  --bg-elev:   #1f1f1f; /* layer-01 */
  --bg-elev-2: #262626; /* gray-90  */
  --bg-elev-3: #393939; /* gray-80  */

  --border:        #393939;
  --border-strong: #525252;

  --fg:        #f4f4f4;
  --fg-muted:  #c6c6c6;
  --fg-dim:    #8d8d8d;
  --fg-faint:  #6f6f6f;

  --accent:        #4589ff;                      /* IBM blue-50 */
  --accent-strong: #78a9ff;                      /* blue-40     */
  --accent-line:   #4589ff;
  --accent-soft:   rgba(69, 137, 255, 0.12);

  --success: #42be65;                            /* green-40 */

  --font-sans:  "IBM Plex Sans",  -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:  "IBM Plex Mono",  "SFMono-Regular", ui-monospace, Menlo, monospace;
  --font-serif: "IBM Plex Serif", Georgia, serif;
}

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

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: #fff; }

a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
  transition: color .12s, border-color .12s;
}
a:hover { color: var(--accent); border-bottom-color: var(--accent); }

button { font: inherit; color: inherit; }

code, kbd { font-family: var(--font-mono); }

/* ---------- page shell ---------- */
.page {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 28px 120px;
}

main { display: block; }

/* ---------- topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  padding: 14px 0;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.topbar .repo-path {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.01em;
  border-bottom: none;
  transition: color .15s;
}
.topbar .repo-path:hover { color: var(--accent); }

/* ---------- section divider headers ---------- */
.sec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin: 0 0 28px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
  letter-spacing: 0.02em;
}
.sec-head .title {
  margin: 0;
  color: var(--fg);
  font-size: 22px;
  font-family: var(--font-sans);
  font-weight: 400;
  letter-spacing: -0.01em;
}
.sec-head .right {
  color: var(--fg-faint);
  font-size: 11.5px;
  letter-spacing: 0.04em;
}
.sec-head .right-action {
  font-family: var(--font-mono);
  border-bottom: none;
  cursor: pointer;
  transition: color .12s;
}
.sec-head .right-action:hover { color: var(--accent); }

/* ---------- hero (apply) ---------- */
.hero { margin-bottom: 80px; }

.cmd-stack {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 16px;
}
.cmd-group { display: flex; flex-direction: column; gap: 8px; }
.cmd-label {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 14.5px;
  color: var(--fg-muted);
  line-height: 1.5;
}

.cmd-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: stretch;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  transition: border-color .15s, background .15s;
}
.cmd-row:hover {
  border-color: var(--border-strong);
  border-left-color: var(--accent-strong);
}
.cmd-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--fg);
  white-space: pre;
  overflow-x: auto;
  scrollbar-width: thin;
  padding: 14px 16px;
  min-width: 0;
}
.cmd-code .prompt {
  color: var(--fg-faint);
  user-select: none;
  margin-right: 10px;
}
.cmd-copy {
  border: none;
  background: transparent;
  border-left: 1px solid var(--border);
  padding: 0 18px;
  cursor: pointer;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 92px;
  transition: color .12s, background .12s;
}
.cmd-copy:hover  { color: var(--fg); background: var(--bg-elev-2); }
.cmd-copy.copied { color: var(--success); }

/* ---------- bootstrap / steps ---------- */
.bootstrap { margin-bottom: 80px; }
.bootstrap .sec-head { margin-bottom: 0; }

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  counter-reset: step;
}
.step {
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 18px 0;
  align-items: flex-start;
  counter-increment: step;
}
.step:first-child { border-top: none; }
.step:last-child  { border-bottom: 1px solid var(--border); }

/* Auto-numbered step gutter — replaces the React .step-num span. */
.step::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-faint);
  padding-top: 2px;
  letter-spacing: 0.04em;
}
.step:has(> details[open])::before { color: var(--accent); }

.step > details { min-width: 0; }
.step > details > summary {
  list-style: none;
  cursor: pointer;
}
.step > details > summary::-webkit-details-marker { display: none; }
.step > details > summary::marker { display: none; }

.step-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  color: var(--fg);
}
.step-title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -0.005em;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  row-gap: 6px;
}
.step-summary {
  font-size: 14px;
  color: var(--fg-dim);
  margin-top: 4px;
}

.step-toggle {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.step-toggle .chev {
  display: inline-block;
  transition: transform .15s;
  font-family: var(--font-mono);
}
.step-toggle .label-open { display: none; }
details[open] > summary .step-toggle .label-closed { display: none; }
details[open] > summary .step-toggle .label-open   { display: inline; }
details[open] > summary .step-toggle .chev         { transform: rotate(90deg); }

.step-body { margin-top: 18px; }
.step-body p {
  font-size: 14.5px;
  color: var(--fg-muted);
  margin: 0 0 12px;
  line-height: 1.6;
}
/* Kramdown turns `>` lines into <blockquote><p>…</p></blockquote>; style as the note. */
.step-body p.note,
.step-body blockquote {
  border-left: 2px solid var(--accent);
  padding: 6px 0 6px 12px;
  background: var(--accent-soft);
  color: var(--fg);
  font-size: 14px;
  margin: 12px 0;
}
.step-body blockquote p {
  margin: 0;
  color: var(--fg);
  font-size: 14px;
  line-height: 1.55;
}
.step-body blockquote p + p { margin-top: 8px; }

/* ---------- code blocks — docs-style header strip + body ---------- */
.code-block {
  margin: 12px 0 18px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.cb-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--fg-dim);
  letter-spacing: 0.02em;
}
.cb-dot {
  width: 7px; height: 7px;
  background: var(--accent);
  flex-shrink: 0;
}
.cb-lang {
  color: var(--fg);
  text-transform: lowercase;
  letter-spacing: 0.06em;
}
.cb-sep { color: var(--fg-faint); }
.cb-before {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 10.5px;
  color: var(--accent-strong);
}
.cb-path {
  color: var(--fg-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.cb-copy {
  margin-left: auto;
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 10px;
  cursor: pointer;
  flex-shrink: 0;
  transition: color .12s, border-color .12s, background .12s;
}
.cb-copy:hover {
  color: var(--fg);
  border-color: var(--border-strong);
  background: var(--bg);
}
.cb-copy.copied {
  color: var(--success);
  border-color: transparent;
}
.cb-body {
  margin: 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
  line-height: 1.6;
  overflow-x: auto;
  scrollbar-width: thin;
  white-space: pre;
}
.cb-body code {
  font: inherit;
  color: inherit;
  background: transparent;
  padding: 0;
}

/* ---- syntax token colors (Carbon-ish) ----------------------------------
   Rouge (Jekyll's default) emits short token classes inside the <code>:
       .nb  builtins / commands     → fg + medium weight
       .nt  flags (--foo)           → red-30
       .s1  .s2  .sh  .sb  .s       → green-30 (strings, heredoc body)
       .se  escapes (\ at EOL)      → faint (operator color)
       .o   operators &&  |  <<     → faint
       .nv  variables $X            → cyan-30
       .no  constants (EOF tag)     → purple-40
       .nn  namespaces ([ini])      → purple-40
       .k   .kc  keywords           → purple-40
       .c   .c1  .cm  comments      → faint italic
   ---------------------------------------------------------------------- */
.cb-body .nb,
.cb-body .nf  { color: var(--fg); font-weight: 500; }
.cb-body .nt  { color: #ff8389; }
.cb-body .s,
.cb-body .s1,
.cb-body .s2,
.cb-body .sb,
.cb-body .sh  { color: #6fdc8c; }
.cb-body .se,
.cb-body .o   { color: var(--fg-faint); }
.cb-body .nv  { color: #82cfff; }
.cb-body .no,
.cb-body .nn,
.cb-body .k,
.cb-body .kc  { color: #be95ff; }
.cb-body .c,
.cb-body .c1,
.cb-body .cm  { color: var(--fg-faint); font-style: italic; }

/* Legacy classes kept for any handwritten span-highlighted snippets. */
.hl-keyword { color: #be95ff; }
.hl-key     { color: var(--fg); }
.hl-op      { color: var(--fg-faint); }
.hl-string  { color: #6fdc8c; }
.hl-flag    { color: #ff8389; }
.hl-var     { color: #82cfff; }
.hl-comment { color: var(--fg-faint); font-style: italic; }
.hl-cmd     { color: var(--fg); font-weight: 500; }

/* ---------- motivation / see also ---------- */
.motivation { margin-bottom: 64px; }
.motivation-body p {
  font-size: 14.5px;
  color: var(--fg-muted);
  margin: 0 0 12px;
  line-height: 1.65;
}
.motivation-body code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
  background: var(--bg-elev-2);
  padding: 1px 6px;
}
.motivation-body ul {
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--fg-muted);
  line-height: 1.65;
}
.motivation-body li { margin-bottom: 4px; }

/* Kramdown emits `<ul><li><a>` for markdown lists; flatten the bullets and let
   each anchor be the row. JS appends .sa-host / .sa-arrow spans at runtime. */
.see-also-list ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}
.see-also-list li { margin: 0; }
.see-also-list a {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: baseline;
  gap: 16px;
  padding: 10px 14px;
  border: none;
  background: transparent;
  color: var(--fg);
  transition: background .12s, color .12s;
}
.see-also-list a:hover {
  background: var(--bg-elev);
  color: var(--accent);
}
.see-also-list a .sa-label {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.see-also-list a:hover .sa-label { text-decoration-color: var(--accent); }
.see-also-list a .sa-host {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-faint);
  letter-spacing: 0.01em;
}
.see-also-list a .sa-arrow {
  font-family: var(--font-mono);
  color: var(--fg-faint);
  font-size: 13px;
  transition: transform .12s, color .12s;
}
.see-also-list a:hover .sa-arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

footer.foot {
  margin-top: 64px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.04em;
}

/* ---------- responsive ---------- */
@media (max-width: 600px) {
  .page { padding: 0 18px 80px; }
  .topbar { flex-wrap: wrap; gap: 14px; }
  .step { grid-template-columns: 32px 1fr; gap: 14px; }
  .cmd-row { grid-template-columns: 1fr; }
  .cmd-copy {
    grid-column: 1 / -1;
    border-left: none;
    border-top: 1px solid var(--border);
    padding: 10px 14px;
    justify-content: flex-start;
    min-width: 0;
  }
  .sec-head { flex-direction: column; align-items: flex-start; gap: 4px; }
  .sec-head .right { font-size: 11px; }
}