/* recovery-bench explainer — shared styles
   Palette is cool-technical rather than warm-editorial: this is a measurement
   project, and two of the hues carry meaning rather than decoration.
   --format and --logic are the thesis's own failure classes. */

:root {
  --paper: #f3f5f6;
  --surface: #ffffff;
  --surface-2: #eaeef0;
  --ink: #16202a;
  --ink-soft: #4a5a68;
  --ink-faint: #7b8a96;
  --rule: #d9e1e5;
  --rule-strong: #b9c6cd;
  --accent: #1a6b66;
  --accent-soft: #e2efed;
  --format: #a8521a;
  --format-soft: #f7ebe1;
  --logic: #3d5a8c;
  --logic-soft: #e6ecf5;
  --good: #2d6a4a;
  --warn: #8a6a12;

  --f-display: "Spectral", Georgia, "Times New Roman", serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --col: 68ch;
  --rail: 208px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f1720;
    --surface: #16202a;
    --surface-2: #1d2a35;
    --ink: #e3eaef;
    --ink-soft: #a2b2be;
    --ink-faint: #6d7f8d;
    --rule: #26333e;
    --rule-strong: #3a4a57;
    --accent: #52c5b8;
    --accent-soft: #123330;
    --format: #dd9159;
    --format-soft: #33231a;
    --logic: #85a8dd;
    --logic-soft: #1a2436;
    --good: #61c08d;
    --warn: #c9a24a;
  }
}

:root[data-theme="dark"] {
  --paper: #0f1720;
  --surface: #16202a;
  --surface-2: #1d2a35;
  --ink: #e3eaef;
  --ink-soft: #a2b2be;
  --ink-faint: #6d7f8d;
  --rule: #26333e;
  --rule-strong: #3a4a57;
  --accent: #52c5b8;
  --accent-soft: #123330;
  --format: #dd9159;
  --format-soft: #33231a;
  --logic: #85a8dd;
  --logic-soft: #1a2436;
  --good: #61c08d;
  --warn: #c9a24a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------------------- shell */

.shell {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: 48px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
  padding-block: 0 96px;
  align-items: start;
}

@media (max-width: 860px) {
  .shell { grid-template-columns: minmax(0, 1fr); gap: 0; }
}

/* ------------------------------------------------------------------ rail */

.rail {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  padding-block: 40px 24px;
  font-size: 13px;
}

@media (max-width: 860px) {
  .rail {
    position: static;
    padding-block: 24px 0;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 32px;
  }
}

.rail-title {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 14px;
}

.rail ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 1px; }

@media (max-width: 860px) {
  .rail ol { flex-direction: row; flex-wrap: wrap; gap: 6px; }
}

.rail a,
.rail span.flat {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 5px 9px;
  border-radius: 4px;
  text-decoration: none;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
}

.rail a:hover { background: var(--surface-2); color: var(--ink); }

.rail a.here {
  background: var(--accent-soft);
  color: var(--ink);
  border-left-color: var(--accent);
  font-weight: 600;
}

.rail span.flat { color: var(--ink-faint); }

.rail .n {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--ink-faint);
  min-width: 1.1em;
}

.rail a.here .n { color: var(--accent); }

.rail .sep {
  height: 1px;
  background: var(--rule);
  margin: 12px 9px;
}

@media (max-width: 860px) { .rail .sep { display: none; } }

/* ------------------------------------------------------------------ main */

main { padding-block: 40px 0; min-width: 0; }

.eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

h1 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(30px, 5.5vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
  text-wrap: balance;
}

.standfirst {
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: var(--col);
  margin: 0 0 32px;
  text-wrap: pretty;
}

h2 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 25px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 52px 0 14px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  text-wrap: balance;
}

h3 {
  font-family: var(--f-body);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.01em;
  margin: 32px 0 8px;
}

p, ul, ol { max-width: var(--col); }
p { margin: 0 0 16px; }

ul, ol { margin: 0 0 16px; padding-left: 20px; }
li { margin-bottom: 7px; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:focus-visible, .rail a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

strong { font-weight: 600; color: var(--ink); }

code {
  font-family: var(--f-mono);
  font-size: 0.86em;
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 3px;
}

pre {
  font-family: var(--f-mono);
  font-size: 12.5px;
  line-height: 1.6;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 2px solid var(--rule-strong);
  border-radius: 5px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 0 0 20px;
}

pre code { background: none; padding: 0; font-size: inherit; }

/* --------------------------------------------------------------- pieces */

.status {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
  margin: 0 0 32px;
  max-width: var(--col);
  font-size: 13.5px;
}

.status div { display: flex; flex-direction: column; gap: 1px; }
.status dt, .status .k {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.status .v { font-weight: 600; font-variant-numeric: tabular-nums; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.pill.done { color: var(--good); }
.pill.next { color: var(--accent); background: var(--accent-soft); }
.pill.planned { color: var(--ink-faint); }
.pill.fmt { color: var(--format); background: var(--format-soft); border-color: transparent; }
.pill.lgc { color: var(--logic); background: var(--logic-soft); border-color: transparent; }

/* a claim worth pulling out of the flow */
.key {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 16px 20px;
  border-radius: 0 6px 6px 0;
  margin: 0 0 24px;
  max-width: var(--col);
}
.key > :last-child { margin-bottom: 0; }
.key .lede {
  font-family: var(--f-display);
  font-size: 19px;
  line-height: 1.4;
  font-weight: 600;
  margin: 0 0 8px;
}

/* a correction to something previously believed */
.fix {
  border-left: 3px solid var(--format);
  background: var(--format-soft);
  padding: 16px 20px;
  border-radius: 0 6px 6px 0;
  margin: 0 0 24px;
  max-width: var(--col);
}
.fix > :last-child { margin-bottom: 0; }
.fix .tag {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--format);
  display: block;
  margin-bottom: 6px;
}

.wrap-x { overflow-x: auto; margin: 0 0 24px; max-width: 100%; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
  min-width: 380px;
}
th, td {
  text-align: left;
  padding: 8px 14px 8px 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
th {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
  border-bottom-color: var(--rule-strong);
}
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; padding-right: 0; }

figure { margin: 0 0 28px; max-width: 100%; }
figure svg { display: block; width: 100%; height: auto; max-width: 100%; }
figcaption {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 10px;
  max-width: var(--col);
  line-height: 1.55;
}

/* cards used on the hub */
.cards { display: grid; gap: 12px; margin: 0 0 28px; max-width: var(--col); }
.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 16px 18px;
}
.card:hover { border-color: var(--accent); }
.card .row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.card h3 { margin: 0; font-size: 16.5px; }
.card p { margin: 5px 0 0; font-size: 14px; color: var(--ink-soft); max-width: none; }

.next-prev {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  max-width: var(--col);
  font-size: 14px;
}

.foot {
  margin-top: 40px;
  font-size: 12.5px;
  color: var(--ink-faint);
  max-width: var(--col);
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ------------------------------------------------- zero-context entry page */

/* Numbered steps: used only where the content really is a sequence. */
.steps { list-style: none; counter-reset: s; padding: 0; margin: 0 0 24px; max-width: var(--col); }
.steps li {
  counter-increment: s;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  margin-bottom: 12px;
}
.steps li::before {
  content: counter(s);
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--accent);
  border: 1px solid var(--rule-strong);
  border-radius: 50%;
  width: 24px; height: 24px;
  display: grid; place-items: center;
  align-self: start;
  margin-top: 2px;
}

/* The one analogy the page leans on. Distinct from .key on purpose — it is a
   figure of speech, not a claim, and should not look like evidence. */
.analogy {
  border: 1px solid var(--rule-strong);
  border-radius: 6px;
  padding: 20px 22px;
  margin: 0 0 24px;
  max-width: var(--col);
  background: var(--surface);
}
.analogy p { font-family: var(--f-display); font-size: 18px; line-height: 1.5; }
.analogy p:last-child { margin-bottom: 0; }
.analogy .src {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  margin-bottom: 10px;
}

/* Plain-language aside for a term that would otherwise stop a reader. */
.term {
  font-size: 14px;
  color: var(--ink-soft);
  border-left: 2px solid var(--rule-strong);
  padding-left: 14px;
  margin: 0 0 20px;
  max-width: var(--col);
}
.term b { color: var(--ink); }

/* Provenance of the work itself. Neutral on purpose — this is a statement of
   fact, not a claim (.key) and not a correction (.fix), and it should not
   borrow the visual weight of either. */
.provenance {
  border: 1px solid var(--rule-strong);
  border-top: 3px solid var(--ink-soft);
  border-radius: 0 0 6px 6px;
  background: var(--surface);
  padding: 18px 22px;
  margin: 0 0 24px;
  max-width: var(--col);
}
.provenance > :last-child { margin-bottom: 0; }
.provenance .tag {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  margin-bottom: 8px;
}
.say {
  font-family: var(--f-display);
  font-size: 17px;
  line-height: 1.5;
  border-left: 2px solid var(--accent);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--ink);
}