:root {
  color-scheme: light;
  --paper: #f2f0e8;
  --paper-deep: #e5e2d6;
  --ink: #15221d;
  --muted: #53625b;
  --line: #b7c0b6;
  --accent: #176449;
  --accent-dark: #103f31;
  --code: #dfe4da;
  --white: #fffef8;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

main {
  width: min(100% - 2rem, 72rem);
  margin-inline: auto;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  transform: translateY(-180%);
  background: var(--ink);
  color: var(--white);
}

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

.hero {
  display: grid;
  gap: 2rem;
  padding-block: 4rem 3rem;
  border-bottom: 1px solid var(--ink);
}

.language-nav {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.language-nav span,
.language-nav a {
  padding-block: 0.15rem;
}

.language-nav span {
  border-bottom: 2px solid var(--accent);
  color: var(--ink);
}

.eyebrow,
h2,
dt {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h3 {
  font-family: Georgia, 'Times New Roman', 'Noto Serif TC', serif;
  font-weight: 500;
  line-height: 1.08;
}

h1 {
  max-width: 13ch;
  margin-block: 0.75rem 0;
  font-size: clamp(2.65rem, 10vw, 6.2rem);
  letter-spacing: -0.045em;
}

.hero__note {
  align-self: end;
  max-width: 38rem;
  color: var(--muted);
}

.hero__note > p {
  margin: 0;
  font-size: 1.05rem;
}

.catalog {
  padding-block: 2.5rem;
}

.section-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  margin-bottom: 2rem;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.dataset {
  display: grid;
  gap: 2rem;
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
}

h3 {
  margin-block: 0 0.75rem;
  font-size: clamp(1.9rem, 6vw, 3.1rem);
}

.dataset__intro > p {
  max-width: 34rem;
  color: var(--muted);
}

.dataset__details {
  min-width: 0;
}

.dataset__actions {
  display: grid;
  gap: 0.65rem;
  margin-top: 1.5rem;
}

.download {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--accent-dark);
  background: var(--accent-dark);
  color: var(--white);
  text-decoration: none;
}

.download:hover {
  background: var(--accent);
}

.download small {
  color: #dce8e1;
  text-align: right;
}

.preview-toggle {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--accent-dark);
  background: transparent;
  color: var(--accent-dark);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.preview-toggle:hover {
  background: var(--paper-deep);
}

.map-preview {
  width: min(70rem, calc(100% - 2rem));
  max-width: none;
  max-height: calc(100dvh - 2rem);
  padding: 0;
  overflow: auto;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 1.5rem 4rem rgb(12 31 26 / 28%);
}

.map-preview::backdrop {
  background: rgb(8 25 21 / 72%);
  backdrop-filter: blur(0.15rem);
}

body:has(.map-preview[open]) {
  overflow: hidden;
}

.map-preview__surface {
  padding: 1rem;
}

.map-preview__header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.map-preview__header h4 {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  line-height: 1.2;
}

.map-preview__close {
  flex: 0 0 auto;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--accent-dark);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.map-preview__close:hover {
  background: var(--paper-deep);
}

.map-preview__note,
.map-preview__status {
  margin-block: 0 0.65rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.map-preview__status {
  min-height: 1.4em;
}

.map-preview__status[data-state='error'] {
  color: #812b25;
}

.map-preview__canvas {
  width: 100%;
  height: min(62dvh, 36rem);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-deep);
}

.map-preview__download {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 700;
}

.maplibregl-popup-content {
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
}

dl {
  display: grid;
  grid-template-columns: minmax(6.5rem, 0.32fr) minmax(0, 1fr);
  gap: 0.6rem 1rem;
  margin: 0;
}

dd {
  min-width: 0;
  margin: 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.checksum {
  word-break: break-all;
}

.attribution {
  margin-block: 1.5rem;
  padding: 1rem;
  border-left: 3px solid var(--accent);
  background: var(--paper-deep);
  color: var(--muted);
  font-size: 0.86rem;
}

.attribution strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--ink);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

details {
  border-top: 1px solid var(--line);
}

summary {
  padding-block: 0.9rem;
  color: var(--accent-dark);
  cursor: pointer;
  font-weight: 700;
}

.technical-details {
  margin-top: 1.5rem;
}

.technical-details__body {
  padding-bottom: 1rem;
}

.technical-details dl {
  margin-bottom: 1rem;
  font-size: 0.86rem;
}

.code-label {
  margin-block: 0.5rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

pre {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  margin: 0;
  padding: 1rem;
  background: var(--code);
  border-left: 3px solid var(--accent);
  font-size: 0.78rem;
}

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding-block: 1.5rem 3rem;
  border-top: 1px solid var(--ink);
  color: var(--muted);
  font-size: 0.8rem;
}

footer p {
  margin: 0;
}

@media (min-width: 44rem) {
  main {
    width: min(100% - 4rem, 72rem);
  }

  .hero {
    grid-template-columns: minmax(22rem, 1.2fr) minmax(18rem, 0.8fr);
    min-height: 31rem;
    padding-block: 5rem 3rem;
  }

  .dataset {
    grid-template-columns: minmax(16rem, 0.8fr) minmax(24rem, 1.2fr);
    column-gap: 4rem;
    padding-block: 3.5rem;
  }

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

  .preview-toggle {
    width: auto;
  }

  .map-preview__canvas {
    height: min(64dvh, 38rem);
  }
}

@media (max-width: 30rem) {
  .map-preview {
    width: calc(100% - 1rem);
    max-height: calc(100dvh - 1rem);
  }

  .map-preview__surface {
    padding: 0.75rem;
  }

  .map-preview__canvas {
    height: min(58dvh, 28rem);
  }

  dl {
    grid-template-columns: 1fr;
    gap: 0.1rem;
  }

  dt:not(:first-child) {
    margin-top: 0.8rem;
  }

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

  .download small {
    text-align: left;
  }
}

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