:root {
  --bg: #f5f2ea;
  --bg-alt: #fbfaf6;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --text: #171918;
  --text-soft: #545b58;
  --line: rgba(23, 25, 24, 0.14);
  --line-strong: rgba(23, 25, 24, 0.28);
  --mint: #0d7c72;
  --gold: #8d6224;
  --shadow: 0 16px 36px rgba(24, 27, 26, 0.06);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --font-display: "Literata", Georgia, serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Code", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background:
    linear-gradient(rgba(23, 25, 24, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 25, 24, 0.025) 1px, transparent 1px),
    linear-gradient(180deg, #fbfaf6 0%, #f5f2ea 50%, #f1ede4 100%);
  background-size: 100% 44px, 44px 100%, 100% 100%;
}

body[data-nav-open="true"] {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

img,
svg {
  display: block;
  max-width: 100%;
}

.site-backdrop {
  display: none;
}

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
}

.site-main {
  padding: 2rem 0 5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  padding-top: 0.5rem;
  background: rgba(245, 242, 234, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.site-header.is-condensed {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 20px rgba(24, 27, 26, 0.05);
}

.masthead {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  min-height: 60px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.masthead__brand {
  display: inline-grid;
  gap: 0.15rem;
  align-self: stretch;
  align-content: center;
  padding: 0.4rem 0;
}

.masthead__name,
.headline,
.subheadline,
.section-title,
.page-brief__head h1,
.hero-brief h1,
.route-ledger__copy h3,
.system-row h3,
.ledger-row strong,
.panel h3,
.route-card strong,
.brief-note strong {
  font-family: var(--font-display);
}

.masthead__name {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.masthead__tag,
.site-nav__link,
.site-nav__drawer-link,
.section-label,
.eyebrow,
.proofline,
.status-pill,
.footer-note,
.footer-bar__links a,
.masthead__link,
.btn,
.text-link,
.issue-row__index,
.metric-card__value,
.timeline-card__index,
.ledger-row__index,
.function-offer__type {
  font-family: var(--font-mono);
}

.masthead__tag,
.site-nav__link,
.site-nav__drawer-link,
.section-label,
.eyebrow,
.proofline,
.status-pill,
.footer-note,
.masthead__link,
.btn,
.text-link,
.issue-row__index,
.metric-card__value,
.timeline-card__index,
.ledger-row__index,
.function-offer__type {
  font-size: 0.68rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.masthead__tag,
.proofline,
.footer-note {
  color: var(--text-soft);
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-nav__link {
  padding: 0.3rem 0;
  color: var(--text-soft);
  border-bottom: 1px solid transparent;
  transition:
    color 160ms ease,
    border-color 160ms ease;
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--text);
  border-bottom-color: var(--text);
}

.masthead__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.masthead__link {
  color: var(--text-soft);
}

.masthead__link--strong {
  color: var(--mint);
}

.site-nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text);
  background: transparent;
  cursor: pointer;
}

.site-nav__drawer {
  position: fixed;
  inset: 0;
  z-index: 80;
  padding: 0.75rem 0;
  background: rgba(245, 242, 234, 0.96);
}

.site-nav__drawer-inner {
  display: grid;
  gap: 1rem;
  padding: 1rem 0 2rem;
}

.site-nav__drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1rem;
}

.site-nav__drawer-links,
.site-nav__drawer-group {
  display: grid;
  gap: 0.6rem;
}

.site-nav__drawer-link {
  display: block;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}

.section {
  margin-top: 3.25rem;
}

.stack {
  display: grid;
  gap: 0.55rem;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.9rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.section-head__copy {
  display: grid;
  gap: 0.15rem;
}

.headline,
.subheadline,
.section-title {
  margin: 0;
  letter-spacing: -0.045em;
}

.headline {
  font-size: clamp(3rem, 7vw, 5.8rem);
  line-height: 0.95;
}

.subheadline {
  font-size: clamp(2rem, 4.5vw, 3.35rem);
  line-height: 1;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1.05;
}

.lead {
  margin: 0;
  font-size: clamp(1.04rem, 1.5vw, 1.28rem);
  line-height: 1.72;
}

.body-copy,
.panel p,
.mini-card p,
.memo-card p,
.signal-card p,
.route-card p,
.ledger-row p,
.system-row p,
.brief-note p,
.issue-row p,
.article-fact p,
.article-rail-card p,
.workflow-card p,
.timeline-card p {
  margin: 0;
  color: var(--text-soft);
}

.hero-brief,
.page-brief,
.closing-brief {
  display: grid;
  gap: 1rem;
  padding: 1.15rem 0 1.25rem;
  border-top: 2px solid var(--line-strong);
}

.hero-brief__body,
.page-brief__head {
  display: grid;
  gap: 0.9rem;
  max-width: 62rem;
}

.page-brief__notes,
.brief-note-list {
  display: grid;
  gap: 0.7rem;
}

.brief-note-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.brief-note {
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
}

.brief-note strong,
.issue-row strong,
.route-card strong,
.ledger-row strong,
.system-row h3,
.route-ledger__copy h3,
.panel h3 {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 1.18rem;
  line-height: 1.12;
  color: var(--text);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 38px;
  padding: 0 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    color 160ms ease;
}

.btn--primary {
  color: var(--bg-alt);
  border-color: var(--text);
  background: var(--text);
}

.btn--secondary,
.btn--ghost {
  color: var(--text);
  background: transparent;
}

.btn__glyph {
  font-size: 0.92rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--mint);
}

.text-link::after {
  content: "↗";
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.metric-card {
  padding-top: 0.9rem;
  border-top: 1px solid var(--line-strong);
}

.metric-card__value {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--mint);
}

.issue-index,
.route-ledger,
.systems-index,
.ledger-groups,
.signal-grid,
.grid-2,
.grid-3,
.grid-4,
.contact-track-grid,
.briefing-split,
.split-layout,
.article-intro,
.hero-grid,
.reading-route-grid {
  display: grid;
  gap: 1rem;
}

.issue-row,
.route-ledger__item,
.system-row,
.route-card,
.article-fact,
.article-rail-card,
.workflow-card,
.timeline-card {
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.issue-index {
  gap: 0;
}

.issue-row {
  display: grid;
  grid-template-columns: 72px minmax(220px, 340px) 1fr;
  align-items: start;
  gap: 1rem;
}

.issue-row__index,
.ledger-row__index,
.timeline-card__index {
  color: var(--gold);
}

.route-ledger__item {
  display: grid;
  gap: 0.9rem;
}

.route-ledger__meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.route-ledger__main {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 0.8fr));
  gap: 1rem;
}

.route-ledger__cluster {
  display: grid;
  gap: 0.45rem;
}

.muted {
  color: var(--text-soft);
}

.route-ledger__cluster strong,
.function-offer__title,
.mandate-card h3 {
  margin-bottom: 0;
  font-size: 0.86rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.function-offer-list,
.note-column,
.memo-stack {
  display: grid;
  gap: 0.65rem;
}

.function-offer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.7rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--line);
}

.ledger-groups {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ledger-group {
  display: grid;
  gap: 0.9rem;
}

.ledger-group__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.ledger-table {
  display: grid;
  gap: 0;
}

.ledger-row {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1rem;
  align-items: start;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
}

.systems-index {
  gap: 0;
}

.system-row__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: start;
}

.system-row__action {
  min-width: 90px;
  text-align: right;
}

.signal-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.signal-card,
.mini-card,
.memo-card,
.mandate-card {
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.mandate-grid {
  display: grid;
  gap: 1rem;
}

.mandate-grid--two,
.grid-2,
.briefing-split,
.split-layout,
.hero-grid,
.article-intro,
.reading-route-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4,
.contact-track-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.panel,
.hero-main,
.article-main,
.contact-form,
.site-footer {
  position: relative;
}

.panel,
.hero-main,
.article-main {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.route-card__meta,
.content-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.7rem;
}

.eyebrow,
.section-label {
  color: var(--mint);
}

.status-pill--cyan {
  color: var(--mint);
}

.eyebrow--gold,
.status-pill--gold {
  color: var(--gold);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 0.75rem;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  color: var(--text);
}

.detail-list {
  margin: 0;
  padding-left: 1rem;
  color: var(--text-soft);
}

.detail-list li + li {
  margin-top: 0.35rem;
}

.article-fact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.footer-bar {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 2rem;
  padding: 1rem 0 2rem;
  margin-top: 4rem;
  border-top: 2px solid var(--line-strong);
}

.footer-bar__lead {
  display: grid;
  gap: 0.45rem;
}

.footer-bar__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.2rem;
  align-content: start;
  justify-content: flex-start;
}

.footer-copy {
  margin: 0;
  max-width: 40rem;
}

.field,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--text);
  background: var(--surface-strong);
}

.field {
  min-height: 48px;
  padding: 0 0.9rem;
}

textarea {
  min-height: 180px;
  padding: 0.9rem;
  resize: vertical;
}

.field::placeholder,
textarea::placeholder {
  color: #7f8682;
}

.field:focus,
textarea:focus {
  outline: none;
  border-color: var(--line-strong);
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.route-card.is-active {
  border-top-color: var(--mint);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.form-response {
  min-height: 1.5rem;
  color: var(--text-soft);
}

.form-response--success {
  color: var(--mint);
}

.form-response--error {
  color: #aa3f2d;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 420ms ease,
    transform 420ms ease;
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1120px) {
  .site-nav {
    display: none;
  }

  .site-nav__toggle {
    display: inline-flex;
  }

  .route-ledger__main,
  .system-row__grid,
  .signal-grid,
  .brief-note-list,
  .metric-grid,
  .ledger-groups,
  .grid-4,
  .grid-3,
  .grid-2,
  .briefing-split,
  .split-layout,
  .hero-grid,
  .article-intro,
  .reading-route-grid,
  .contact-track-grid,
  .article-fact-grid,
  .footer-bar {
    grid-template-columns: 1fr;
  }

  .issue-row {
    grid-template-columns: 56px 1fr;
  }

  .issue-row p {
    grid-column: 2;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 20px, 1240px);
  }

  .site-main {
    padding-top: 1.25rem;
  }

  .masthead {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .masthead__actions {
    gap: 0.7rem;
  }

  .masthead__link {
    display: none;
  }

  .headline {
    font-size: clamp(2.4rem, 12vw, 4rem);
  }

  .subheadline {
    font-size: clamp(1.8rem, 9vw, 2.7rem);
  }

  .button-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .issue-row,
  .ledger-row {
    grid-template-columns: 44px 1fr;
  }
}