/* ============================================================
   larch carbon field system
   custom layer over self hosted Bulma
   site 4 :: carbonmodel.org
   ============================================================ */

/* -- 01 tokens ------------------------------------------------ */
:root {
  --larch-paper: #ffffff;
  --larch-mist: #f3f5f2;
  --larch-veil: #e9ece7;
  --larch-ink: #12211b;
  --larch-ink-soft: #4a5850;
  --larch-ink-faint: #75827b;
  --larch-teal: #1f5369;
  --larch-teal-bright: #2f6f88;
  --larch-teal-deep: #123544;
  --larch-teal-ink: #0c2530;
  --larch-amber: #ffa000;
  --larch-amber-deep: #c87800;
  --larch-amber-soft: #fff3d8;
  --larch-rule: #dde2dc;
  --larch-rule-strong: #c7ceC6;

  --larch-serif: "Gelasio", Georgia, "Times New Roman", Times, serif;
  --larch-sans: "Arimo", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --larch-measure: 68ch;
  --larch-shell: 1440px;
  --larch-rail: 278px;
  --larch-gutter: clamp(20px, 4vw, 60px);
  --larch-step: 8px;
  --larch-radius-s: 6px;
  --larch-radius-m: 10px;
  --larch-shadow: 0 1px 2px rgba(18, 33, 27, 0.06), 0 8px 24px -18px rgba(18, 33, 27, 0.35);

  /* bulma 1.x variable bridge */
  --bulma-primary-h: 198;
  --bulma-primary-s: 54%;
  --bulma-primary-l: 27%;
  --bulma-link-h: 198;
  --bulma-link-s: 54%;
  --bulma-link-l: 27%;
  --bulma-link-hover-h: 36;
  --bulma-link-hover-s: 100%;
  --bulma-link-hover-l: 50%;
  --bulma-text: 122 33 27;
  --bulma-text-strong: 122 33 27;
  --bulma-body-background-color: #ffffff;
  --bulma-body-color: #12211b;
  --bulma-title-color: #12211b;
  --bulma-family-primary: "Gelasio", Georgia, "Times New Roman", serif;
  --bulma-family-secondary: "Arimo", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --bulma-family-code: "SFMono-Regular", Menlo, Consolas, monospace;
  --bulma-radius: 6px;
  --bulma-radius-small: 4px;
  --bulma-radius-large: 10px;
  --bulma-border: #dde2dc;
  --bulma-border-weak: #e9ece7;
}

/* -- 02 baseline ---------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body.larch-body {
  margin: 0;
  background: var(--larch-paper);
  color: var(--larch-ink);
  font-family: var(--larch-serif);
  font-size: 1.02rem;
  line-height: 1.72;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.larch-body img { max-width: 100%; height: auto; }

:where(.larch-body) a { color: var(--larch-teal); }
:where(.larch-body) a:hover { color: var(--larch-amber-deep); }

.larch-body :focus-visible {
  outline: 3px solid var(--larch-amber);
  outline-offset: 2px;
  border-radius: 2px;
}

.larch-skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--larch-teal-deep);
  color: #fff;
  padding: 10px 16px;
  z-index: 999;
  font-family: var(--larch-sans);
}
.larch-skip:focus { left: 8px; top: 8px; }

.larch-eyebrow {
  font-family: var(--larch-sans);
  font-size: 0.72rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--larch-teal);
  margin: 0 0 10px;
}

/* -- 03 masthead ---------------------------------------------- */
.larch-masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(150%) blur(9px);
  border-bottom: 1px solid var(--larch-rule);
}

.larch-masthead__inner {
  max-width: var(--larch-shell);
  margin: 0 auto;
  padding: 12px var(--larch-gutter);
  display: flex;
  align-items: center;
  gap: 22px;
}

.larch-brand {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.larch-brand__mark {
  flex: none;
  display: grid;
  place-items: center;
}
.larch-brand__mark img { height: 44px; width: auto; }

.larch-brand__name {
  font-family: var(--larch-serif);
  font-weight: 700;
  font-size: 1.32rem;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--larch-ink);
  display: block;
}

.larch-brand__tag {
  font-family: var(--larch-sans);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  color: var(--larch-ink-faint);
  display: block;
  margin-top: 2px;
}

.larch-masthead__tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.larch-masthead__link {
  font-family: var(--larch-sans);
  font-size: 0.74rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  font-weight: 600;
  text-decoration: none;
  color: var(--larch-ink-soft);
  padding: 8px 4px;
}
.larch-masthead__link:hover { color: var(--larch-teal); }

.larch-burger {
  display: none;
  appearance: none;
  border: 1px solid var(--larch-rule-strong);
  background: #fff;
  border-radius: var(--larch-radius-s);
  width: 42px;
  height: 38px;
  cursor: pointer;
  padding: 0;
}
.larch-burger span,
.larch-burger span::before,
.larch-burger span::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--larch-ink);
  margin: 0 auto;
  position: relative;
}
.larch-burger span::before { content: ""; position: absolute; top: -6px; }
.larch-burger span::after { content: ""; position: absolute; top: 6px; }

/* -- 04 frame + rail ------------------------------------------ */
.larch-frame {
  max-width: var(--larch-shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--larch-rail) minmax(0, 1fr);
  align-items: start;
}

.larch-rail {
  position: sticky;
  top: 66px;
  align-self: start;
  height: calc(100vh - 66px);
  overflow-y: auto;
  padding: 30px 24px 60px var(--larch-gutter);
  border-right: 1px solid var(--larch-rule);
  background: var(--larch-paper);
}

.larch-rail__heading {
  font-family: var(--larch-sans);
  font-size: 0.66rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--larch-ink-faint);
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--larch-rule);
}

.larch-rail__group { margin-bottom: 26px; }

.larch-rail__label {
  font-family: var(--larch-sans);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--larch-teal);
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.larch-rail__label::before {
  content: "";
  width: 14px;
  height: 2px;
  background: var(--larch-amber);
  display: inline-block;
}

.larch-nav { list-style: none; margin: 0; padding: 0; }

.larch-nav a {
  display: block;
  font-family: var(--larch-sans);
  font-size: 0.86rem;
  line-height: 1.35;
  text-decoration: none;
  color: var(--larch-ink);
  padding: 7px 12px 7px 14px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--larch-radius-s) var(--larch-radius-s) 0;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.larch-nav a:hover {
  background: var(--larch-mist);
  color: var(--larch-teal);
}
.larch-nav a.is-current {
  background: var(--larch-teal-deep);
  color: #fff;
  border-left-color: var(--larch-amber);
  font-weight: 600;
}
.larch-nav a.is-branch { color: var(--larch-teal); font-weight: 600; }
.larch-nav .larch-nav__sub { list-style: none; margin: 2px 0 6px; padding: 0; }
.larch-nav .larch-nav__sub a {
  padding-left: 26px;
  font-size: 0.8rem;
  color: var(--larch-ink-soft);
}
.larch-nav .larch-nav__sub .larch-nav__sub a { padding-left: 38px; font-size: 0.78rem; }

.larch-rail__search { margin-bottom: 22px; }
.larch-rail__search form { display: block; }
.larch-rail__search form > div { display: flex; gap: 8px; }
.larch-rail__search form .larch-input { flex: 1 1 auto; width: auto; min-width: 0; }

/* -- 05 main + prose ------------------------------------------ */
.larch-main {
  min-width: 0;
  padding: 34px var(--larch-gutter) 80px;
}

.larch-crumbs {
  font-family: var(--larch-sans);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  margin-bottom: 26px;
}
.larch-crumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}
.larch-crumbs li + li::before {
  color: var(--larch-rule-strong);
  content: "/";
  margin-right: 6px;
}
.larch-crumbs a { text-decoration: none; color: var(--larch-ink-faint); }
.larch-crumbs a:hover { color: var(--larch-teal); }
.larch-crumbs li.is-active a { color: var(--larch-ink); font-weight: 600; }

.larch-title {
  font-family: var(--larch-sans);
  font-weight: 700;
  font-size: clamp(1.85rem, 3.6vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--larch-ink);
  margin: 0 0 6px;
}

.larch-standfirst {
  font-family: var(--larch-serif);
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--larch-ink-soft);
  max-width: var(--larch-measure);
  margin: 0 0 30px;
}

.larch-prose { max-width: var(--larch-measure); }
.larch-prose > * + * { margin-top: 1.05em; }
.larch-prose p { margin: 0; }
.larch-prose h2 {
  font-family: var(--larch-serif);
  font-size: 1.5rem;
  line-height: 1.25;
  margin: 2.1em 0 0.2em;
  color: var(--larch-ink);
}
.larch-prose h2::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  background: var(--larch-amber);
  margin-top: 10px;
}
.larch-prose h3 {
  font-family: var(--larch-sans);
  font-size: 0.82rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--larch-teal);
  margin: 1.9em 0 0.4em;
}
.larch-prose ul,
.larch-prose ol { margin: 1em 0 0; padding-left: 1.25em; }
.larch-prose li { margin: 0.35em 0; }
.larch-prose li::marker { color: var(--larch-amber-deep); }
.larch-prose blockquote {
  border-left: 3px solid var(--larch-amber);
  background: var(--larch-amber-soft);
  margin: 1.4em 0;
  padding: 14px 18px;
  font-style: italic;
  color: var(--larch-ink);
}
.larch-prose strong { font-weight: 700; }
.larch-prose code {
  font-family: var(--bulma-family-code);
  background: var(--larch-mist);
  border: 1px solid var(--larch-rule);
  border-radius: var(--larch-radius-s);
  padding: 1px 6px;
  font-size: 0.9em;
}

.larch-figure {
  margin: 1.9em 0;
  padding: 18px;
  background: var(--larch-mist);
  border: 1px solid var(--larch-rule);
  border-radius: var(--larch-radius-m);
}
.larch-figure img { display: block; margin: 0 auto; border-radius: var(--larch-radius-s); }
.larch-figure figcaption {
  font-family: var(--larch-sans);
  font-size: 0.76rem;
  color: var(--larch-ink-faint);
  margin-top: 12px;
  text-align: center;
}

/* -- 06 heroes + cards ---------------------------------------- */
.larch-hero {
  position: relative;
  overflow: hidden;
  background: var(--larch-teal-deep);
  color: #eaf2f0;
  border-radius: var(--larch-radius-m);
  padding: clamp(34px, 5vw, 66px);
  margin-bottom: 40px;
}
.larch-hero__motif {
  position: absolute;
  inset: 0;
  opacity: 0.4;
  pointer-events: none;
}
.larch-hero__inner { position: relative; max-width: 780px; }
.larch-hero h1 {
  font-family: var(--larch-sans);
  font-weight: 700;
  font-size: clamp(2.1rem, 4.6vw, 3.3rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
  color: #fff;
}
.larch-hero p {
  font-family: var(--larch-serif);
  font-size: 1.16rem;
  line-height: 1.62;
  color: #cfe0dd;
  max-width: 60ch;
  margin: 0 0 26px;
}
.larch-hero .larch-eyebrow { color: var(--larch-amber); }

.larch-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.larch-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--larch-sans);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--larch-radius-s);
  padding: 12px 20px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.14s ease, background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.larch-btn:hover { transform: translateY(-1px); }
.larch-btn--solid { background: var(--larch-amber); color: #2a1a00; }
.larch-btn--solid:hover { background: #ffb733; color: #2a1a00; }
.larch-btn--ghost { border-color: rgba(255, 255, 255, 0.75); color: #ffffff; background: rgba(255, 255, 255, 0.06); }
.larch-btn--ghost:hover { background: rgba(255, 255, 255, 0.18); color: #ffffff; }
.larch-btn--line { border-color: var(--larch-teal); color: var(--larch-teal); }
.larch-btn--line:hover { background: var(--larch-teal); color: #fff; }

.larch-section { margin: 52px 0; }
.larch-section__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  border-bottom: 1px solid var(--larch-rule);
  padding-bottom: 12px;
  margin-bottom: 26px;
}
.larch-section__head h2 {
  font-family: var(--larch-serif);
  font-size: 1.7rem;
  margin: 0;
  line-height: 1.2;
}
.larch-section__head p {
  font-family: var(--larch-sans);
  font-size: 0.76rem;
  color: var(--larch-ink-faint);
  margin: 0 0 0 auto;
  text-align: right;
}

.larch-grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(248px, 1fr)); }
.larch-grid--two { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.larch-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--larch-rule);
  border-radius: var(--larch-radius-m);
  padding: 24px 24px 22px;
  transition: border-color 0.16s ease, box-shadow 0.18s ease, transform 0.18s ease;
}
.larch-card::before {
  content: "";
  position: absolute;
  left: 24px;
  top: -1px;
  width: 38px;
  height: 3px;
  background: var(--larch-amber);
  border-radius: 0 0 3px 3px;
}
.larch-card:hover {
  border-color: var(--larch-teal-bright);
  box-shadow: var(--larch-shadow);
  transform: translateY(-2px);
}
.larch-card__kicker {
  font-family: var(--larch-sans);
  font-size: 0.66rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--larch-ink-faint);
  margin: 0 0 8px;
}
.larch-card h3 {
  font-family: var(--larch-serif);
  font-size: 1.22rem;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--larch-ink);
}
.larch-card p {
  font-size: 0.96rem;
  color: var(--larch-ink-soft);
  margin: 0 0 16px;
}
.larch-card__go {
  margin-top: auto;
  font-family: var(--larch-sans);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--larch-teal);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.larch-card:hover .larch-card__go { color: var(--larch-amber-deep); }
.larch-card__go::after { content: "→"; transition: transform 0.16s ease; }
.larch-card:hover .larch-card__go::after { transform: translateX(4px); }

.larch-stat {
  border-left: 3px solid var(--larch-amber);
  padding: 4px 0 4px 16px;
}
.larch-stat b {
  display: block;
  font-family: var(--larch-serif);
  font-size: 1.9rem;
  line-height: 1.1;
  color: var(--larch-teal);
}
.larch-stat span {
  font-family: var(--larch-sans);
  font-size: 0.78rem;
  color: var(--larch-ink-soft);
}

/* -- 07 topic strip / index ----------------------------------- */
.larch-topiclist { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.larch-topiclist li { border-bottom: 1px solid var(--larch-rule); }
.larch-topiclist li:first-child { border-top: 1px solid var(--larch-rule); }
.larch-topiclist a {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 8px;
  text-decoration: none;
  color: inherit;
}
.larch-topiclist a:hover { background: var(--larch-mist); }
.larch-topiclist__no {
  font-family: var(--larch-sans);
  font-size: 0.72rem;
  color: var(--larch-amber-deep);
  font-weight: 700;
  width: 28px;
  flex: none;
}
.larch-topiclist__txt { flex: 1; min-width: 0; }
.larch-topiclist__txt b { font-family: var(--larch-serif); font-size: 1.05rem; display: block; }
.larch-topiclist__txt span { font-family: var(--larch-sans); font-size: 0.78rem; color: var(--larch-ink-faint); }

/* -- 08 tag + chips ------------------------------------------- */
.larch-chip {
  display: inline-block;
  font-family: var(--larch-sans);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--larch-teal);
  background: var(--larch-veil);
  border: 1px solid var(--larch-rule-strong);
  border-radius: 999px;
  padding: 4px 12px;
}
.larch-chip:hover { background: var(--larch-amber-soft); border-color: var(--larch-amber); color: var(--larch-amber-deep); }
.larch-chips { display: flex; flex-wrap: wrap; gap: 8px; }

/* -- 09 forms ------------------------------------------------- */
.larch-field { margin-bottom: 16px; }
.larch-field label {
  display: block;
  font-family: var(--larch-sans);
  font-size: 0.74rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--larch-ink-soft);
  margin-bottom: 6px;
}
.larch-input,
.larch-textarea,
.larch-select {
  width: 100%;
  font-family: var(--larch-sans);
  font-size: 0.92rem;
  color: var(--larch-ink);
  background: #fff;
  border: 1px solid var(--larch-rule-strong);
  border-radius: var(--larch-radius-s);
  padding: 11px 13px;
}
.larch-input:focus,
.larch-textarea:focus,
.larch-select:focus { border-color: var(--larch-teal); outline: none; box-shadow: 0 0 0 3px rgba(31, 83, 105, 0.14); }
.larch-textarea { min-height: 132px; resize: vertical; }
.larch-note { font-family: var(--larch-sans); font-size: 0.78rem; color: var(--larch-ink-faint); }
.larch-form-status {
  font-family: var(--larch-sans);
  font-size: 0.86rem;
  border-radius: var(--larch-radius-s);
  padding: 12px 14px;
  margin-top: 14px;
  display: none;
}
.larch-form-status.is-ok { display: block; background: #e7f4ec; color: #1d6b41; border: 1px solid #b9e0c8; }
.larch-form-status.is-bad { display: block; background: #fdecea; color: #a6231a; border: 1px solid #f3c2bd; }
.larch-form-error { border-color: #d94b3f !important; }

.larch-searchform { display: flex; gap: 10px; max-width: 660px; }
.larch-searchform .larch-input { flex: 1 1 auto; width: auto; min-width: 0; }

/* -- 10 callout ----------------------------------------------- */
.larch-callout {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--larch-mist);
  border: 1px solid var(--larch-rule);
  border-left: 4px solid var(--larch-amber);
  border-radius: var(--larch-radius-m);
  padding: 22px 24px;
  margin: 30px 0;
}
.larch-callout h3 { font-family: var(--larch-serif); margin: 0 0 6px; font-size: 1.15rem; }
.larch-callout p { margin: 0; color: var(--larch-ink-soft); }

.larch-callout--deep { background: var(--larch-teal-deep); border-color: var(--larch-teal-deep); color: #dfe9e7; }
.larch-callout--deep h3 { color: #fff; }
.larch-callout--deep p { color: #c5d6d3; }
.larch-callout--deep a { color: var(--larch-amber); }

/* -- 11 article / blog ---------------------------------------- */
.larch-article { border-bottom: 1px solid var(--larch-rule); padding: 30px 0; }
.larch-article:first-of-type { padding-top: 6px; }
.larch-article__meta {
  font-family: var(--larch-sans);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--larch-ink-faint);
  margin-bottom: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.larch-article__meta b { color: var(--larch-teal); font-weight: 600; }
.larch-article h2 { font-family: var(--larch-serif); font-size: 1.42rem; line-height: 1.28; margin: 0 0 10px; }
.larch-article h2 a { text-decoration: none; color: var(--larch-ink); }
.larch-article h2 a:hover { color: var(--larch-teal); }
.larch-article .larch-prose { font-size: 0.99rem; }

.larch-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 30px;
  font-family: var(--larch-sans);
  font-size: 0.8rem;
}
.larch-pager a { text-decoration: none; font-weight: 600; }

/* -- 12 footer ------------------------------------------------ */
.larch-foot {
  background: var(--larch-teal-ink);
  color: #b9cbc8;
  margin-top: 60px;
}
.larch-foot__inner {
  max-width: var(--larch-shell);
  margin: 0 auto;
  padding: 54px var(--larch-gutter) 30px;
  display: grid;
  gap: 34px;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
}
.larch-foot h3 {
  font-family: var(--larch-sans);
  font-size: 0.68rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: #7fa1a0;
  margin: 0 0 14px;
}
.larch-foot p { font-size: 0.92rem; color: #adc0bd; margin: 0 0 12px; }
.larch-foot ul { list-style: none; margin: 0; padding: 0; }
.larch-foot li { margin: 0 0 9px; }
.larch-foot a { color: #d7e4e2; text-decoration: none; font-family: var(--larch-sans); font-size: 0.86rem; }
.larch-foot a:hover { color: var(--larch-amber); }
.larch-foot__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.larch-foot__brand b { color: #fff; font-family: var(--larch-serif); font-size: 1.2rem; }
.larch-foot__legal {
  max-width: var(--larch-shell);
  margin: 0 auto;
  padding: 18px var(--larch-gutter) 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-family: var(--larch-sans);
  font-size: 0.76rem;
  color: #86a3a0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: center;
}
.larch-foot__legal a { color: #b9d0cd; }
.larch-foot__legal span.larch-year { color: var(--larch-amber); }

/* -- 13 reveal + misc ----------------------------------------- */
.larch-reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
.larch-reveal.is-in { opacity: 1; transform: none; }

.larch-rule { border: 0; border-top: 1px solid var(--larch-rule); margin: 34px 0; }

.larch-index-list { list-style: none; margin: 0; padding: 0; }
.larch-index-list li { border-bottom: 1px solid var(--larch-rule); }
.larch-index-list a { display: block; padding: 13px 6px; text-decoration: none; color: var(--larch-ink); }
.larch-index-list a:hover { color: var(--larch-teal); background: var(--larch-mist); }
.larch-index-list span { display: block; font-family: var(--larch-sans); font-size: 0.77rem; color: var(--larch-ink-faint); }

.larch-meta-table { width: 100%; border-collapse: collapse; font-family: var(--larch-sans); font-size: 0.86rem; }
.larch-meta-table th, .larch-meta-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--larch-rule); }
.larch-meta-table th { width: 190px; color: var(--larch-ink-soft); font-weight: 600; }

.larch-center { text-align: center; }
.larch-mt { margin-top: 26px; }
.larch-mb0 { margin-bottom: 0; }

/* -- 14 responsive -------------------------------------------- */
@media (max-width: 1040px) {
  .larch-frame { grid-template-columns: minmax(0, 1fr); }
  .larch-rail {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: min(88vw, 330px);
    z-index: 80;
    border-right: 1px solid var(--larch-rule);
    transform: translateX(-102%);
    transition: transform 0.24s ease;
    padding-top: 22px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.25);
  }
  .larch-rail.is-open { transform: none; }
  .larch-burger { display: block; }
  .larch-masthead__ink { display: none; }
  .larch-scrim {
    position: fixed;
    inset: 0;
    background: rgba(12, 37, 48, 0.5);
    z-index: 70;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.24s ease;
  }
  .larch-scrim.is-on { opacity: 1; pointer-events: auto; }
  .larch-foot__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .larch-masthead__ink,
  .larch-brand__tag { display: none; }
  .larch-foot__inner { grid-template-columns: 1fr; }
  .larch-section__head { display: block; }
  .larch-section__head p { margin: 6px 0 0; text-align: left; }
  .larch-title { font-size: 1.7rem; }
  .larch-hero { padding: 30px 22px; }
  .larch-prose { font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .larch-reveal { opacity: 1; transform: none; transition: none; }
  .larch-card:hover { transform: none; }
  .larch-btn:hover { transform: none; }
  .larch-rail { transition: none; }
}

@media print {
  .larch-masthead, .larch-rail, .larch-foot, .larch-crumbs, .larch-actions { display: none !important; }
  .larch-main { padding: 0; }
  .larch-frame { display: block; }
  body.larch-body { font-size: 11pt; }
}