@charset "utf-8";

:root {
  color-scheme: light;
  --paper: #f4f0e6;
  --chalk: #fffcf5;
  --ink: #20282d;
  --slate: #4b555a;
  --cobalt: #214fbf;
  --amber: #9a5d12;
  --rule: rgb(32 40 45 / 24%);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --measure: 72rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 1rem;
  background: var(--paper);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

[hidden] {
  display: none !important;
}

.no-js .explorer-app {
  display: none;
}

.page-width {
  width: min(var(--measure), calc(100% - 3rem));
  margin-inline: auto;
}

a {
  color: var(--cobalt);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.19em;
}

a:hover {
  color: var(--ink);
  text-decoration-thickness: 0.13em;
}

:focus-visible {
  outline: 3px solid var(--cobalt);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  z-index: 10;
  top: var(--space-2);
  left: var(--space-2);
  transform: translateY(-160%);
  padding: var(--space-2) var(--space-4);
  background: var(--ink);
  color: var(--chalk);
}

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

.site-header {
  border-bottom: 1px solid var(--rule);
}

.site-header__inner,
.site-nav,
.site-footer__inner,
.site-footer nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__inner {
  min-height: 4.5rem;
  gap: var(--space-6);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.wordmark__mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  color: var(--cobalt);
  font-family: var(--serif);
  font-size: 1.25rem;
  line-height: 1;
}

.site-nav {
  justify-content: flex-end;
  gap: clamp(1rem, 3vw, 2.5rem);
  font-size: 0.9rem;
}

.site-nav a,
.site-footer nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-weight: 600;
}

.site-nav a:last-child {
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(18rem, 0.86fr);
  align-items: center;
  gap: var(--space-8);
  padding-block: clamp(3.5rem, 8vw, 7rem) clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--rule);
}

.hero__copy {
  max-width: 47rem;
}

.hero__kicker,
.section-heading__eyebrow {
  margin: 0 0 var(--space-4);
  color: var(--amber);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.025em;
}

.hero h1,
.section-heading h2,
.paths h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.hero h1 {
  max-width: 13ch;
  font-size: clamp(2.7rem, 5.7vw, 4.5rem);
  line-height: 0.99;
}

.hero__intro {
  max-width: 42rem;
  margin: var(--space-6) 0 0;
  color: var(--slate);
  font-size: clamp(1.03rem, 1.45vw, 1.16rem);
  line-height: 1.65;
}

.hero__counts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-8) 0 0;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 650;
}

.hero__counts span:not(.count-divider) {
  color: var(--cobalt);
  font-variant-numeric: tabular-nums;
}

.count-divider {
  padding-inline: 0.15rem;
  color: var(--amber);
}

.branch-figure {
  margin: 0;
  padding: var(--space-4) 0 var(--space-4) var(--space-4);
}

.branch-figure__drawing {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
  color: var(--cobalt);
}

.branch-label,
.branch-answer,
.branch-mark {
  fill: var(--ink);
  font-family: var(--sans);
}

.branch-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.branch-answer {
  fill: var(--slate);
  font-size: 15px;
}

.branch-mark {
  fill: var(--cobalt);
  font-family: var(--serif);
  font-size: 24px;
}

.branch-figure figcaption {
  max-width: 28rem;
  margin: var(--space-3) 0 0 auto;
  color: var(--slate);
  font-family: var(--serif);
  font-size: 0.98rem;
  font-style: italic;
  text-align: right;
}

.explorer {
  padding-block: clamp(3rem, 6vw, 5rem) clamp(4rem, 7vw, 6rem);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.section-heading__eyebrow {
  margin-bottom: var(--space-2);
}

.section-heading h2,
.paths h2 {
  max-width: 18ch;
  font-size: clamp(2rem, 3.7vw, 3rem);
  line-height: 1.08;
}

.section-heading__note {
  max-width: 29rem;
  margin: 0 0 0 auto;
  color: var(--slate);
  font-size: 0.94rem;
}

.search-panel {
  padding: var(--space-6);
  border: 1px solid var(--rule);
  background: var(--chalk);
}

.search-label,
.filter-field label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
}

.search-row {
  display: flex;
  gap: var(--space-3);
}

input[type="search"],
select {
  min-width: 0;
  min-height: 48px;
  border: 1px solid var(--slate);
  border-radius: 2px;
  background: var(--chalk);
  color: var(--ink);
  font: inherit;
}

input[type="search"] {
  flex: 1;
  padding: 0.7rem 0.9rem;
}

input[type="search"]::placeholder {
  color: #59636a;
  opacity: 1;
}

select {
  width: 100%;
  padding: 0.65rem 2rem 0.65rem 0.75rem;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
}

.button--primary {
  background: var(--cobalt);
  color: #fff;
}

.button--primary:hover {
  background: #173c94;
  color: #fff;
}

.button--quiet {
  border-color: var(--slate);
  background: transparent;
  color: var(--ink);
}

.button--quiet:hover {
  background: #e9e4d9;
}

.search-hint {
  margin: var(--space-2) 0 0;
  color: var(--slate);
  font-size: 0.84rem;
}

.explorer-layout {
  display: grid;
  grid-template-columns: minmax(18rem, 0.35fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  margin-top: var(--space-8);
  align-items: start;
}

.filter-rail {
  min-width: 0;
  margin: 0;
  padding: var(--space-4);
  border: 1px solid var(--rule);
  background: #eee9de;
}

.filter-rail legend {
  padding-inline: var(--space-2);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
}

.filter-field + .filter-field {
  margin-top: var(--space-4);
}

.filter-field label {
  margin-bottom: var(--space-1);
  font-size: 0.84rem;
}

.filter-rail > .button {
  width: 100%;
  margin-top: var(--space-4);
}

.review-note {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--rule);
  color: var(--slate);
  font-size: 0.8rem;
  line-height: 1.5;
}

.results {
  min-width: 0;
  scroll-margin-top: var(--space-4);
}

.results__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 0 0 var(--space-3);
  border-bottom: 2px solid var(--ink);
}

.results__header h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 600;
}

.results__header p {
  margin: 0;
  color: var(--slate);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

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

.result-row {
  padding: var(--space-4) 0 var(--space-6);
  border-bottom: 1px solid var(--rule);
}

.result-row__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}

.result-row__title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 600;
  line-height: 1.25;
}

.result-row__title a {
  color: var(--ink);
  text-decoration-color: var(--cobalt);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
}

.result-row__title a:hover {
  color: var(--cobalt);
}

.result-row__summary {
  max-width: 67ch;
  margin: var(--space-2) 0;
  color: var(--slate);
  line-height: 1.55;
}

.result-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.65rem;
  color: var(--slate);
  font-size: 0.82rem;
}

.result-row__meta span + span::before {
  content: "·";
  margin-right: 0.65rem;
  color: var(--amber);
}

.result-row__review {
  font-weight: 700;
}

.result-row__review[data-state="source_checked"] {
  color: #245642;
}

.result-row__review[data-state="partially_source_checked"] {
  color: #754500;
}

.result-row__review[data-state="needs_source_check"] {
  color: #5b4246;
}

.empty-state,
.load-error {
  margin-top: var(--space-6);
  padding: var(--space-6);
  border-left: 4px solid var(--amber);
  background: #eee9de;
}

.empty-state h4,
.load-error h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 600;
}

.empty-state p,
.load-error p {
  margin: var(--space-2) 0 0;
  color: var(--slate);
}

.text-button {
  margin-top: var(--space-3);
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--cobalt);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.load-error {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.load-error__actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-4);
}

.noscript-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  margin-top: var(--space-6);
  padding: var(--space-4);
  border: 1px solid var(--rule);
  background: var(--chalk);
}

.noscript-note p {
  margin: 0;
}

.paths {
  display: grid;
  grid-template-columns: minmax(13rem, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(2rem, 7vw, 6rem);
  align-items: center;
  padding-block: clamp(3rem, 7vw, 5.5rem);
  border-top: 1px solid var(--rule);
}

.paths__art {
  color: var(--cobalt);
}

.paths__art svg {
  display: block;
  width: min(100%, 19rem);
  height: auto;
  margin-inline: auto;
}

.paths__content {
  max-width: 48rem;
}

.paths h2 {
  max-width: 20ch;
}

.paths__intro {
  max-width: 48ch;
  margin: var(--space-4) 0 var(--space-6);
  color: var(--slate);
}

.path-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: var(--space-8);
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
  list-style: none;
}

.path-list li {
  border-bottom: 1px solid var(--rule);
}

.path-list a {
  display: flex;
  min-height: 3.25rem;
  align-items: center;
  padding-block: var(--space-2);
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 600;
}

.path-list a:hover {
  color: var(--cobalt);
}

.site-footer {
  border-top: 1px solid var(--rule);
}

.site-footer__inner {
  min-height: 6rem;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.site-footer__credit {
  max-width: 30rem;
  margin: 0;
  color: var(--slate);
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
}

.site-footer nav {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0 var(--space-6);
  font-size: 0.84rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 760px) {
  .page-width {
    width: min(var(--measure), calc(100% - 2rem));
  }

  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
    padding-block: var(--space-3) var(--space-2);
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    gap: var(--space-3);
    font-size: 0.83rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding-block: var(--space-12) var(--space-8);
  }

  .hero h1 {
    max-width: 14ch;
    font-size: clamp(2.5rem, 11vw, 3.25rem);
  }

  .branch-figure {
    max-width: 28rem;
    margin-left: auto;
    padding: 0;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-3);
  }

  .section-heading__note {
    max-width: 45ch;
    margin: 0;
  }

  .search-panel {
    padding: var(--space-4);
  }

  .explorer-layout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .filter-rail {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3) var(--space-4);
  }

  .filter-rail legend {
    grid-column: 1 / -1;
  }

  .filter-field + .filter-field {
    margin-top: 0;
  }

  .filter-rail > .button,
  .review-note {
    grid-column: 1 / -1;
    margin-top: 0;
  }

  .review-note {
    margin-top: var(--space-1);
  }

  .paths {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .paths__art svg {
    width: min(100%, 15rem);
  }

  .site-footer__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-3);
    padding-block: var(--space-6);
  }

  .site-footer nav {
    justify-content: flex-start;
    gap: 0 var(--space-4);
  }
}

@media (max-width: 480px) {
  .site-nav {
    gap: 0.5rem;
    font-size: 0.78rem;
  }

  .wordmark {
    min-height: 44px;
  }

  .search-row {
    flex-direction: column;
  }

  .search-row .button {
    width: 100%;
  }

  .filter-rail {
    grid-template-columns: 1fr;
  }

  .filter-rail legend,
  .filter-rail > .button,
  .review-note {
    grid-column: 1;
  }

  .results__header {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-1);
  }

  .results__header p {
    text-align: left;
  }

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

  .load-error,
  .noscript-note {
    align-items: flex-start;
    flex-direction: column;
  }

  .load-error__actions {
    align-items: flex-start;
    flex-direction: column;
  }
}

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