:root {
  --accent: #1f5f73;
  --accent-dark: #164756;
  --accent-soft: #dcebef;
  --ink: #1b1d20;
  --ink-2: #4b5059;
  --ink-3: #7a808a;
  --rule: #e4e1da;
  --paper: #fcfbf8;
  --paper-2: #f3f1eb;
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --measure: 66ch;
  --wide: 1080px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.6;
  font-feature-settings: "kern", "liga", "onum";
}

img { display: block; max-width: 100%; height: auto; }

a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: .15em;
}
a:hover { color: var(--accent); text-decoration-color: var(--accent); }

::selection { background: var(--accent-soft); }

h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 500; line-height: 1.15; letter-spacing: -.01em; }
h1 { font-size: clamp(2.1rem, 4.2vw, 3rem); }
h2 { margin: 2.75rem 0 .9rem; font-size: clamp(1.5rem, 2.6vw, 1.9rem); }
h3 { margin: 1.8rem 0 .5rem; font-size: 1.2rem; }
p { margin: 0 0 1.1em; }

.wrap { width: min(100% - 2rem, var(--wide)); margin-inline: auto; }
.prose { max-width: var(--measure); }
.prose blockquote { margin: 1.25rem 0; padding-left: 1rem; border-left: 2px solid var(--accent); color: var(--ink-2); font-size: 1rem; }

.kicker {
  margin-bottom: .9rem;
  font-family: var(--sans);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Placeholder content — remove the class once real text is in */
.todo { background: #fff4c2; border-radius: 3px; padding: 0 .2em; }

/* Header */
.site-head { border-bottom: 1px solid var(--rule); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .75rem 2rem; padding: 1.25rem 0; }
.site-name { font-size: 1.3rem; font-weight: 500; text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: .4rem 1.5rem; font-family: var(--sans); font-size: .92rem; }
.site-nav a { color: var(--ink-2); text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent); }
.site-nav a[aria-current="page"] { text-decoration: underline; text-underline-offset: .4em; }

/* Page heading */
.page-head { padding: 3.5rem 0 1.5rem; }
.page-head .lede { max-width: var(--measure); margin-top: 1rem; font-size: 1.25rem; color: var(--ink-2); }

/* Home intro */
.intro { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 3rem; align-items: start; padding: 3.5rem 0 1rem; }
.portrait { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 6px; background: var(--paper-2); }
.portrait.placeholder { display: grid; place-items: center; font-family: var(--sans); font-size: .8rem; color: var(--ink-3); border: 1px dashed var(--rule); }
.intro h1 { margin-bottom: .4rem; }
.intro .role { margin-bottom: 1.5rem; font-family: var(--sans); font-size: .95rem; color: var(--ink-2); }
.links { display: flex; flex-wrap: wrap; gap: .4rem 1.25rem; margin-top: 1.5rem; font-family: var(--sans); font-size: .9rem; }
@media (max-width: 720px) {
  .intro { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 2rem; }
  .portrait { max-width: 200px; }
}

/* Buttons */
.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .65rem 1.1rem;
  border: 1px solid var(--ink); border-radius: 6px;
  background: none; color: var(--ink);
  font-family: var(--sans); font-size: .92rem; font-weight: 500;
  text-decoration: none;
  transition: background .15s, color .15s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

/* Feature tiles (home → projects) */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; margin-top: 1.25rem; }
.tile {
  display: block; position: relative;
  padding: 1.6rem 1.6rem 1.5rem;
  border: 1px solid transparent; border-radius: 10px;
  background: var(--paper-2);
  text-decoration: none;
  transition: border-color .15s, transform .15s;
}
.tile:hover { border-color: var(--accent); color: inherit; transform: translateY(-2px); }
.tile .kicker { margin-bottom: .6rem; font-size: .7rem; }
.tile h3 { margin: 0 0 .5rem; font-size: 1.45rem; }
.tile p { margin: 0; font-size: 1rem; color: var(--ink-2); }
.tile .more { display: inline-block; margin-top: 1rem; font-family: var(--sans); font-size: .85rem; }
.tile .more::after { content: " →"; }

/* Lists of works / news */
.works, .news { margin: 0; padding: 0; list-style: none; }
.works li, .news li { padding: 1rem 0; border-top: 1px solid var(--rule); }
.works li:last-child, .news li:last-child { border-bottom: 1px solid var(--rule); }
.work-title { font-size: 1.12rem; font-weight: 500; }
.work-cite { margin-top: .2rem; font-size: 1rem; color: var(--ink-2); }
.work-note { margin-top: .4rem; font-family: var(--sans); font-size: .85rem; color: var(--ink-3); }
.work-note a { color: var(--ink-2); }

details.abs { display: inline; }
details.abs > summary { display: inline; list-style: none; cursor: pointer; color: var(--ink-2); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent); text-underline-offset: .15em; }
details.abs > summary::-webkit-details-marker { display: none; }
details.abs > summary::after { content: " ▾"; display: inline-block; }
details.abs[open] > summary::after { content: " ▴"; }
details.abs > p { max-width: var(--measure); margin: .6rem 0 .2rem; font-family: var(--serif); font-size: 1rem; line-height: 1.55; color: var(--ink-2); }

.news li { display: grid; grid-template-columns: 7.5rem 1fr; gap: 1.25rem; }
.news time { padding-top: .2rem; font-family: var(--sans); font-size: .85rem; color: var(--ink-3); }
@media (max-width: 600px) { .news li { grid-template-columns: 1fr; gap: .2rem; } }

/* Dataset page: at-a-glance stats */
.glance { margin: 2.5rem 0 .5rem; }
.glance .kicker { color: var(--ink-3); margin: 0; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1.25rem; margin-top: .9rem; }
.stat { padding-top: .75rem; border-top: 2px solid var(--accent); }
.stat .n { font-size: 2.1rem; font-weight: 500; line-height: 1.1; font-variant-numeric: lining-nums tabular-nums; }
.stat .n small { margin-left: .12rem; font-family: var(--sans); font-size: .95rem; font-weight: 400; color: var(--ink-3); }
.stat .l { margin-top: .3rem; font-family: var(--sans); font-size: .88rem; color: var(--ink-2); }
.glance-note { margin: .9rem 0 0; font-family: var(--sans); font-size: .85rem; color: var(--ink-3); }

/* Dataset page: feature card (map / explorer) */
.feature-card {
  display: grid; grid-template-columns: minmax(0, 30rem) minmax(0, 1fr); gap: 2rem; align-items: center;
  margin: 2.5rem 0 1rem; padding: 1.5rem 2rem;
  border: 1px solid var(--rule); border-radius: 12px;
  background: var(--accent-soft);
  text-decoration: none;
  transition: border-color .15s;
}
.feature-card:hover { border-color: var(--accent); color: inherit; }
.feature-card h2 { margin: 0 0 .5rem; }
.feature-card p { margin: 0 0 .75rem; font-size: 1rem; color: var(--ink-2); }
.feature-card .more { font-family: var(--sans); font-size: .9rem; color: var(--accent); }
.feature-card .more::after { content: " →"; }
.feature-shot { justify-self: center; width: 100%; max-width: 280px; aspect-ratio: 4 / 3; border-radius: 6px; background: #fff; display: grid; place-items: center; font-family: var(--sans); font-size: .8rem; color: var(--ink-3); }
@media (max-width: 640px) {
  .feature-card { grid-template-columns: 1fr; gap: 1.25rem; padding: 1.25rem; }
  .feature-shot { order: -1; }
}

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 1rem; }
th, td { padding: .65rem .75rem .65rem 0; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: top; }
th { font-family: var(--sans); font-size: .78rem; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
td code { font-family: var(--mono); font-size: .85rem; white-space: nowrap; }

/* Footer */
.site-foot { margin-top: 5rem; padding: 2rem 0 3rem; border-top: 1px solid var(--rule); font-family: var(--sans); font-size: .85rem; color: var(--ink-3); }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: .4rem 1.25rem; }
.site-foot a { color: var(--ink-2); text-decoration: none; }
.site-foot a:hover { color: var(--accent); }

/* Subtitle under a page title, e.g. a dataset's full name */
h1 .sub { display: block; margin-top: .5rem; font-size: .55em; font-weight: 400; color: var(--ink-2); letter-spacing: 0; }