/* SolvedRight blog: shared stylesheet
   Used by every post. Edit here once, every post updates.
   Matches the homepage "Warm Archival" system:
   paper/ink/brick/stone palette, Instrument Serif headlines,
   Newsreader body, JetBrains Mono labels, Geist UI. */

:root {
  --paper:      #f0eee9;
  --paper-2:    #eae7e0;
  --ink:        #161513;
  --stone:      #6b6557;
  --brick:      #7a3d2e;
  --rule:       #e4dfd4;

  --display: 'Instrument Serif', Georgia, serif;
  --body:    'Newsreader', Georgia, 'Times New Roman', serif;
  --mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --ui:      'Geist', 'Helvetica Neue', Arial, sans-serif;

  --measure: 36rem;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.06rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.wrap {
  width: 100%;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 1.35rem;
}

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

.masthead {
  border-bottom: 1px solid var(--rule);
  padding: 1.1rem 0;
  margin-bottom: 3.5rem;
  background: rgba(240, 238, 233, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.masthead__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--ui);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.wordmark img {
  width: 26px;
  height: 26px;
  filter: brightness(0) saturate(100%);
}

.masthead__nav {
  font-family: var(--ui);
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

.masthead__nav a {
  color: var(--stone);
  text-decoration: none;
  transition: color 0.3s ease;
}

.masthead__nav a:hover { color: var(--ink); }

/* ---------- type ---------- */

.eyebrow {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  margin: 0 0 1.25rem;
}

h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2.4rem, 7vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 1.2rem;
  text-wrap: balance;
}

h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.55rem, 4.6vw, 1.95rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 3rem 0 0.85rem;
  text-wrap: balance;
}

h3 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 1.25rem;
  line-height: 1.25;
  margin: 2rem 0 0.6rem;
}

p { margin: 0 0 1.15rem; }

em { font-style: italic; color: var(--brick); }

.dek {
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--stone);
  margin-bottom: 1.9rem;
}

a { color: var(--brick); text-decoration: none; transition: opacity 0.3s ease; }
a:hover { opacity: 0.7; }

article p a, article li a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  text-decoration-color: rgba(122, 61, 46, 0.4);
}

strong { font-weight: 500; }

/* ---------- byline ---------- */

.byline {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.75rem 0;
  margin-bottom: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
}

/* ---------- table of contents ---------- */

.toc {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  border: 1px solid var(--rule);
  padding: 1.15rem 1.3rem;
  margin: 0 0 2.75rem;
}

.toc__label {
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  margin: 0 0 0.7rem;
}

.toc ol { margin: 0; padding-left: 1.2rem; }
.toc li { margin-bottom: 0.3rem; }
.toc a { color: var(--ink); }
.toc a:hover { color: var(--brick); opacity: 1; }

/* ---------- callout: the test ---------- */

.callout {
  border-left: 2px solid var(--brick);
  background: var(--paper-2);
  padding: 1.3rem 1.4rem 0.4rem;
  margin: 2.25rem 0;
}

.callout__label {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brick);
  margin: 0 0 0.6rem;
}

.callout p:last-child { margin-bottom: 1rem; }

/* ---------- the ladder (signature element) ---------- */

.ladder {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0 0 0 3.4rem;
  position: relative;
}

.ladder::before {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 0.6rem;
  bottom: 4rem;
  width: 1px;
  background: var(--rule);
}

.rung { position: relative; padding-bottom: 2.6rem; }

.rung__num {
  position: absolute;
  left: -3.4rem;
  top: 0.15rem;
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  background: var(--paper);
  border: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink);
}

.rung--durable .rung__num { background: var(--brick); border-color: var(--brick); color: var(--paper); }

.rung__tag {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  margin: 0.2rem 0 0.4rem;
}

.rung--durable .rung__tag { color: var(--brick); }

.rung h2 { margin-top: 0; }

.rung__meta {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.65;
  border-top: 1px solid var(--rule);
  padding-top: 0.7rem;
  margin-top: 1.1rem;
  color: var(--stone);
}

.rung__meta b {
  color: var(--ink);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 9.5px;
}

/* reveal */
@media (prefers-reduced-motion: no-preference) {
  .rung { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
  .rung.is-visible { opacity: 1; transform: none; }
}

/* ---------- trigger list ---------- */

.triggers { margin: 1.5rem 0 0; padding: 0; list-style: none; counter-reset: trig; }

.triggers li {
  counter-increment: trig;
  border-top: 1px solid var(--rule);
  padding: 1rem 0 0.9rem 2.5rem;
  position: relative;
}

.triggers li::before {
  content: counter(trig, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.15rem;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--brick);
}

.triggers b { font-weight: 500; }

/* ---------- series index ---------- */

.series { list-style: none; margin: 1.5rem 0 0; padding: 0; }

.series li {
  border-top: 1px solid var(--rule);
  padding: 0.95rem 0;
  display: flex;
  gap: 0.9rem;
  align-items: baseline;
}

.series li:last-child { border-bottom: 1px solid var(--rule); }

.series__n {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--brick);
  flex: 0 0 1.6rem;
}

.series__title { font-family: var(--display); font-size: 1.15rem; line-height: 1.3; }

.series__status {
  display: block;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  margin-top: 0.25rem;
}

/* ---------- cta ---------- */

.cta {
  border-top: 1px solid var(--rule);
  margin-top: 3.5rem;
  padding-top: 1.9rem;
}

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--brick);
  color: var(--brick);
  background: transparent;
  text-decoration: none;
  padding: 0.7rem 1.4rem;
  margin-top: 0.4rem;
  transition: all 0.3s ease;
}

.btn:hover { background: var(--brick); color: var(--paper); opacity: 1; }

/* ---------- footer ---------- */

.foot {
  border-top: 1px solid var(--rule);
  margin-top: 4rem;
  padding: 1.5rem 0 3rem;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

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

.postlist { list-style: none; margin: 2rem 0 0; padding: 0; }

.postlist li { border-top: 1px solid var(--rule); padding: 1.6rem 0; }
.postlist li:last-child { border-bottom: 1px solid var(--rule); }

.postlist h2 { margin: 0.4rem 0 0.5rem; font-size: 1.5rem; }
.postlist h2 a { color: var(--ink); }
.postlist h2 a:hover { color: var(--brick); opacity: 1; }

.postlist p { margin: 0; color: var(--stone); font-size: 0.95rem; }

.postlist__meta {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
}

.is-upcoming { opacity: 0.55; }

/* ---------- copy-paste prompt blocks ---------- */

.prompt {
  border: 1px solid var(--rule);
  border-left: 2px solid var(--brick);
  background: var(--paper-2);
  margin: 1.5rem 0 1.75rem;
  padding: 0;
}

.prompt__label {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brick);
  padding: 0.7rem 1.2rem 0;
  margin: 0;
}

.prompt pre {
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--ink);
  margin: 0;
  padding: 0.75rem 1.2rem 1rem;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}

/* ---------- numbered setup steps ---------- */

.steps { margin: 1.5rem 0; padding: 0; list-style: none; counter-reset: step; }

.steps li {
  counter-increment: step;
  border-top: 1px solid var(--rule);
  padding: 0.9rem 0 0.8rem 2.5rem;
  position: relative;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1rem;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--brick);
}

/* ---------- a11y ---------- */

a:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--brick);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
}

@media (max-width: 30rem) {
  body { font-size: 1rem; }
  .masthead__inner { padding: 0 1.35rem; }
  .ladder { padding-left: 2.8rem; }
  .ladder::before { left: 0.85rem; }
  .rung__num { left: -2.8rem; width: 1.75rem; height: 1.75rem; font-size: 0.7rem; }
}