:root {
  --page: #f4f4f0;
  --surface: #fbfbf8;
  --ink: #18222d;
  --muted: #58636d;
  --accent: #245f86;
  --accent-dark: #174662;
  --accent-soft: #e8eff3;
  --line: #cdd3d7;
  --line-strong: #9ea8ae;
  --measure: 68ch;
  --sans: "IBM Plex Sans", sans-serif;
  --serif: "Literata", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent-dark);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--accent);
}

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.55rem 0.8rem;
  color: #ffffff;
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.publication-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 244, 240, 0.96);
  backdrop-filter: blur(12px);
}

.publication-nav {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 1.25rem;
  align-items: center;
  width: min(1120px, calc(100% - 3rem));
  min-height: 64px;
  margin-inline: auto;
}

.wordmark {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
}

.project-label {
  padding-left: 1.25rem;
  border-left: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.publication-nav nav {
  display: flex;
  gap: 1.35rem;
  align-items: center;
  justify-content: flex-end;
}

.publication-nav nav a {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
}

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

.publication-nav .nav-read {
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--ink);
  color: var(--ink);
}

main,
.publication-footer {
  width: min(1120px, calc(100% - 3rem));
  margin-inline: auto;
}

.publication-masthead {
  padding: clamp(3.5rem, 8vw, 7rem) 0 2.2rem;
  border-bottom: 1px solid var(--ink);
}

.edition-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0;
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.edition-line span {
  padding-right: 0.9rem;
}

.edition-line span + span {
  padding-left: 0.9rem;
  border-left: 1px solid var(--line-strong);
}

.masthead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(250px, 0.55fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: end;
}

.section-label {
  margin: 0 0 0.55rem;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.085em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.025em;
}

.publication-masthead h1 {
  max-width: 12ch;
  margin-bottom: 1.2rem;
  font-size: clamp(2.45rem, 4.5vw, 3.9rem);
  line-height: 0.98;
}

.subtitle {
  max-width: 34ch;
  margin-bottom: 1.3rem;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  line-height: 1.4;
}

.deck {
  max-width: 58ch;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.8rem;
}

.action {
  display: inline-flex;
  min-height: 44px;
  padding: 0.58rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  background: transparent;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition:
    background-color 140ms ease,
    border-color 140ms ease,
    color 140ms ease;
}

.action:hover {
  border-color: var(--ink);
  color: var(--ink);
  background: var(--surface);
}

.action-primary {
  border-color: var(--accent-dark);
  color: #ffffff;
  background: var(--accent-dark);
}

.action-primary:hover {
  border-color: var(--accent);
  color: #ffffff;
  background: var(--accent);
}

.origin-note {
  padding-left: clamp(1.4rem, 3vw, 2.2rem);
  border-left: 1px solid var(--line-strong);
}

.origin-note h2 {
  margin-bottom: 1rem;
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  line-height: 1.2;
}

.origin-note p:not(.section-label) {
  margin-bottom: 0.8rem;
  color: var(--muted);
  font-size: 0.93rem;
}

.evidence-path {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: clamp(3rem, 7vw, 5.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.evidence-path li {
  padding: 0.85rem 0.8rem 0.1rem 0;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 500;
}

.evidence-path li + li {
  padding-left: 0.8rem;
  border-left: 1px solid var(--line);
}

.evidence-path span {
  display: block;
  margin-bottom: 0.05rem;
  color: var(--muted);
  font-size: 0.66rem;
  letter-spacing: 0.07em;
}

.edition-register {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 1fr) minmax(180px, 0.7fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
  padding: clamp(2.8rem, 6vw, 4.5rem) 0;
  border-bottom: 1px solid var(--line-strong);
}

.register-intro h2,
.section-heading h2,
.feedback-section h2 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  line-height: 1.18;
}

.register-intro p:not(.section-label) {
  max-width: var(--measure);
  margin-bottom: 0;
  color: var(--muted);
}

.register-data {
  margin: 0;
}

.register-data div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}

.register-data div:first-child {
  border-top: 1px solid var(--line);
}

.register-data dt {
  color: var(--muted);
  font-size: 0.82rem;
}

.register-data dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 600;
  text-align: right;
}

.register-links {
  display: grid;
  gap: 0.65rem;
  font-size: 0.84rem;
}

.module-index,
.policy-section {
  padding: clamp(3.8rem, 8vw, 6.5rem) 0;
  border-bottom: 1px solid var(--line-strong);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(300px, 1.2fr);
  gap: clamp(2rem, 7vw, 6rem);
  align-items: end;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-heading h2 {
  margin-bottom: 0;
}

.section-heading > p {
  max-width: var(--measure);
  margin-bottom: 0;
  color: var(--muted);
}

.module-list {
  border-top: 1px solid var(--ink);
}

.module-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  gap: 1.4rem;
  align-items: center;
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--line);
}

.module-number {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.module-status {
  margin-bottom: 0.25rem;
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.module-row h3 {
  margin-bottom: 0.35rem;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  line-height: 1.25;
}

.module-row p:last-child {
  max-width: 70ch;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.module-row > a {
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
}

.module-row-planned {
  color: var(--muted);
}

.module-row-planned .module-status {
  color: var(--muted);
}

.policy-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
}

.policy-list article {
  padding: 1.5rem 1.5rem 0 0;
}

.policy-list article + article {
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}

.policy-list span {
  display: block;
  margin-bottom: 1.5rem;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.policy-list h3 {
  margin-bottom: 0.65rem;
  font-size: 1.2rem;
  line-height: 1.3;
}

.policy-list p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.feedback-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  padding: clamp(3rem, 6vw, 5rem) 0;
  border-bottom: 1px solid var(--ink);
}

.feedback-section h2 {
  margin-bottom: 0.65rem;
}

.feedback-section p:not(.section-label) {
  max-width: var(--measure);
  margin-bottom: 0;
  color: var(--muted);
}

.publication-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 1.25rem;
  align-items: center;
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.publication-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .publication-nav {
    grid-template-columns: auto 1fr;
  }

  .project-label {
    display: none;
  }

  .masthead-grid,
  .edition-register,
  .section-heading {
    grid-template-columns: 1fr;
  }

  .masthead-grid {
    align-items: start;
  }

  .origin-note {
    max-width: var(--measure);
  }

  .edition-register,
  .section-heading {
    gap: 2rem;
  }

  .register-links {
    grid-template-columns: repeat(2, max-content);
  }

  .policy-list {
    grid-template-columns: 1fr;
  }

  .policy-list article {
    display: grid;
    grid-template-columns: 44px minmax(150px, 0.45fr) 1fr;
    gap: 1rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--line);
  }

  .policy-list article + article {
    padding-left: 0;
    border-left: 0;
  }

  .policy-list span,
  .policy-list h3,
  .policy-list p {
    margin: 0;
  }
}

@media (max-width: 640px) {
  .publication-header {
    position: relative;
  }

  .publication-nav {
    display: flex;
    width: min(100% - 1.5rem, 1120px);
    min-height: 0;
    padding: 0.85rem 0;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .publication-nav nav {
    width: 100%;
    padding-top: 0.7rem;
    border-top: 1px solid var(--line);
    gap: 1rem;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .publication-nav nav a {
    white-space: nowrap;
  }

  .publication-nav .nav-read {
    padding: 0;
    border: 0;
  }

  main,
  .publication-footer {
    width: min(100% - 1.5rem, 1120px);
  }

  .publication-masthead {
    padding-top: 3rem;
  }

  .edition-line {
    margin-bottom: 2.5rem;
  }

  .edition-line span:last-child {
    width: 100%;
    padding: 0.3rem 0 0;
    border-left: 0;
  }

  .publication-masthead h1 {
    font-size: clamp(2.35rem, 11vw, 2.85rem);
  }

  .origin-note {
    padding: 1.3rem 0 0;
    border-top: 1px solid var(--line-strong);
    border-left: 0;
  }

  .evidence-path {
    grid-template-columns: repeat(5, minmax(96px, 1fr));
    max-width: 100%;
    padding-bottom: 0.5rem;
    overflow-x: auto;
  }

  .module-row {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 0.8rem;
  }

  .module-row > a {
    grid-column: 2;
    white-space: normal;
  }

  .policy-list article {
    grid-template-columns: 36px 1fr;
  }

  .policy-list p {
    grid-column: 2;
  }

  .feedback-section {
    grid-template-columns: 1fr;
  }

  .feedback-section .action {
    justify-self: start;
  }

  .publication-footer {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}