/* ============================================================
   NYC Rent Burden Atlas — styles
   Every colour is a token. Light tokens on :root; dark tokens on
   :root[data-theme="dark"] (set before first paint by the inline
   script in index.html, from localStorage or prefers-color-scheme).
   Chart mark colours live in assets/js/util.js (THEMES) and follow
   the same data-theme attribute.
   ============================================================ */

:root {
  color-scheme: light;
  /* brand ramp */
  --navy-900: #0b2545;
  --navy-800: #13315c;
  --blue-600: #184f95;
  --blue-500: #256abf;
  --blue-450: #2a78d6;
  --blue-350: #5598e7;
  --blue-250: #86b6ef;
  --blue-50: #eaf2fc;

  /* surfaces */
  --page: #f6f8fb;
  --surface-1: #ffffff;          /* cards, chart surface */
  --surface-2: #ffffff;          /* inputs, table header */
  --surface-band: #eef3f9;
  --surface-hover: #eaf2fc;
  --border: #dde4ee;
  --border-strong: #c4cfdd;
  --grid: #e6ebf2;
  --shadow: 0 1px 2px rgba(11, 37, 69, .06), 0 4px 16px rgba(11, 37, 69, .05);

  /* text */
  --text-primary: #0d1b2e;
  --text-secondary: #43536a;
  --text-muted: #5f6e84;
  --heading: #0b2545;
  --link: #1f5fb0;
  --eyebrow: #2a6cc0;

  /* header / hero / footer (dark in both themes) */
  --header-bg: rgba(11, 37, 69, .97);
  --header-text: #d6e3f5;
  --header-active: #184f95;
  --hero-from: #0b2545;
  --hero-to: #13315c;
  --hero-text: #c9d8ee;
  --hero-accent: #86b6ef;
  --hero-tile: rgba(255, 255, 255, .06);
  --hero-tile-border: rgba(255, 255, 255, .12);
  --hero-tile-label: #b9cbe5;
  --hero-tile-note: #9fb4d3;
  --footer-bg: #0b2545;
  --footer-text: #b9cbe5;

  /* components */
  --accent: #2a78d6;
  --accent-cyan: #1b8aa0;
  --tab-track: #eef3f9;
  --tab-active: #ffffff;
  --tooltip-bg: #0b2545;
  --tooltip-text: #ffffff;
  --tooltip-muted: #a9c1e2;
  --tooltip-border: transparent;
  --badge-bg: #eaf2fc;
  --badge-text: #184f95;
  --warn-bg: #fff4dc;
  --warn-text: #7a4d00;
  --pass-bg: #e3f2ea;
  --pass-text: #1d6b42;
  --fail-bg: #fde8e8;
  --fail-text: #9b1c1c;
  --selected-row: #fff7e0;
  --map-outline: #0b2545;
  --map-hover: #0b2545;
  --select-ring: #f2a900;
  --hatch-a: #e9edf2;
  --hatch-b: #cfd7e2;
  --focus: #5598e7;

  --radius: 12px;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Source Serif 4", Georgia, serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0b1a2e;               /* deep navy */
  --surface-1: #12274a;          /* elevated cards */
  --surface-2: #17305a;
  --surface-band: #0e2039;
  --surface-hover: #1b3866;
  --border: #284670;             /* subtle blue-gray */
  --border-strong: #3a5a86;
  --grid: #213c63;
  --shadow: 0 1px 2px rgba(0, 0, 0, .25), 0 6px 20px rgba(0, 0, 0, .22);

  --text-primary: #e9eff8;       /* soft white */
  --text-secondary: #b6c5da;     /* light gray-blue */
  --text-muted: #94a8c4;
  --heading: #f1f5fb;
  --link: #8ec2ff;
  --eyebrow: #6fc7d9;            /* muted cyan */

  --header-bg: rgba(6, 17, 33, .97);
  --header-text: #c9d8ee;
  --header-active: #1f5fb0;
  --hero-from: #071427;
  --hero-to: #0d2140;
  --hero-text: #c2d2ea;
  --hero-accent: #8ec2ff;
  --hero-tile: rgba(255, 255, 255, .05);
  --hero-tile-border: rgba(142, 194, 255, .18);
  --hero-tile-label: #b0c3df;
  --hero-tile-note: #93a9c9;
  --footer-bg: #061121;
  --footer-text: #a9bcd8;

  --accent: #4c9bff;             /* vibrant professional blue */
  --accent-cyan: #5cc4d6;
  --tab-track: #0e2039;
  --tab-active: #1f3d6b;
  --tooltip-bg: #1e3c68;
  --tooltip-text: #f3f7fc;
  --tooltip-muted: #a8c3e6;
  --tooltip-border: #3d628f;
  --badge-bg: #1b3866;
  --badge-text: #b9d6fb;
  --warn-bg: #3d2f12;
  --warn-text: #f5cf7d;
  --pass-bg: #123b2c;
  --pass-text: #8be0b4;
  --fail-bg: #45191c;
  --fail-text: #ffb3b3;
  --selected-row: #3a3215;
  --map-outline: rgba(233, 239, 248, .85);
  --map-hover: #ffffff;
  --select-ring: #ffc233;
  --hatch-a: #17305a;
  --hatch-b: #2a4874;
  --focus: #8ec2ff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font: 400 16px/1.6 var(--font-sans);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1, h2 { font-family: var(--font-serif); font-weight: 600; letter-spacing: -.01em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); color: var(--heading); }
h3 { font-size: 1.05rem; font-weight: 600; }
p { margin: 0 0 1em; }
a { color: var(--link); }
small { color: var(--text-muted); }
a:focus-visible, button:focus-visible, select:focus-visible, input:focus-visible, [tabindex]:focus-visible, th:focus-visible, tr:focus-visible {
  outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px;
}
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.narrow-ish { max-width: 920px; }
.skip-link { position: absolute; left: -9999px; top: 8px; background: var(--navy-900); color: #fff; padding: 8px 12px; z-index: 100; }
.skip-link:focus { left: 8px; }

/* Theme switch transition: applied briefly by JS, never under reduced motion */
html.theme-anim, html.theme-anim *, html.theme-anim *::before, html.theme-anim *::after {
  transition: background-color .28s ease, color .28s ease, border-color .28s ease, fill .28s ease, stroke .28s ease, box-shadow .28s ease !important;
}

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--header-bg); backdrop-filter: saturate(140%) blur(6px); color: #fff; }
.header-inner { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 600; white-space: nowrap; }
.brand em { font-style: normal; color: var(--hero-accent); }
.brand-mark { width: 22px; height: 22px; border-radius: 5px; flex: none;
  background: linear-gradient(90deg, #86b6ef 0 28%, transparent 28% 36%, #cde2fb 36% 64%, transparent 64% 72%, #5598e7 72%);
  clip-path: polygon(0 45%, 28% 45%, 28% 100%, 0 100%, 0 45%, 36% 20%, 64% 20%, 64% 100%, 36% 100%, 36% 20%, 72% 55%, 100% 55%, 100% 100%, 72% 100%);
}
.site-nav { display: flex; gap: 4px; margin-left: auto; }
.site-nav a { color: var(--header-text); text-decoration: none; font-size: .9rem; padding: 6px 10px; border-radius: 6px; }
.site-nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.site-nav a.active { background: var(--header-active); color: #fff; }
.header-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.3); border-radius: 8px;
  min-height: 38px; min-width: 38px; padding: 0 10px; font: 500 .9rem var(--font-sans); cursor: pointer;
}
.header-btn:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.5); }
.nav-toggle { display: none; margin-left: auto; }
.theme-toggle { padding: 0; width: 38px; flex: none; }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---------- hero ---------- */
.hero { background: linear-gradient(180deg, var(--hero-from) 0%, var(--hero-to) 100%); color: #fff; padding: 56px 0 48px; }
.hero h1 { font-size: clamp(2rem, 4.6vw, 3.1rem); max-width: 24ch; color: #fff; }
.hero .lede { font-size: 1.15rem; color: var(--hero-text); max-width: 62ch; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .75rem; font-weight: 600; color: var(--eyebrow); margin-bottom: .6em; }
.hero .eyebrow { color: var(--hero-accent); }
.hero-figure { display: flex; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin: 32px 0 28px; }
.hero-figure .big { font-size: clamp(3.5rem, 9vw, 5.5rem); font-weight: 700; line-height: 1; letter-spacing: -.03em; }
.hero-figure .big small { font-size: .45em; font-weight: 600; color: var(--hero-accent); }
.hero-figure .explain { max-width: 46ch; color: var(--hero-text); padding-bottom: 6px; }
.hero-figure .explain strong { color: #fff; }

.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.kpi { background: var(--hero-tile); border: 1px solid var(--hero-tile-border); border-radius: var(--radius); padding: 16px 18px; }
.kpi .label { font-size: .82rem; color: var(--hero-tile-label); }
.kpi .value { font-size: 1.7rem; font-weight: 600; letter-spacing: -.01em; margin-top: 2px; }
.kpi .note { font-size: .78rem; color: var(--hero-tile-note); margin-top: 4px; }
.kpis.small { margin-bottom: 20px; }
.kpis.small .kpi { background: var(--surface-1); border-color: var(--border); box-shadow: var(--shadow); }
.kpis.small .kpi .label { color: var(--text-secondary); }
.kpis.small .kpi .value { color: var(--heading); }
.kpis.small .kpi .note { color: var(--text-muted); }

/* ---------- sections ---------- */
.section { padding: 64px 0; }
.band { background: var(--surface-band); padding: 56px 0; }
.section-head { max-width: 760px; margin-bottom: 24px; }
.section-head p { color: var(--text-secondary); }

.card { background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px 22px; margin-bottom: 20px; min-width: 0; }
.card-title { color: var(--heading); margin-bottom: 4px; }
.card-sub { color: var(--text-secondary); font-size: .9rem; margin-bottom: 8px; }
.card-head-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.source { font-size: .78rem; color: var(--text-muted); margin: 10px 0 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid-2 > .card { margin-bottom: 20px; }

.measures { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.measure { background: var(--surface-1); border-radius: var(--radius); padding: 16px 18px; border: 1px solid var(--border); border-top: 3px solid var(--accent); box-shadow: var(--shadow); }
.measure h3 { color: var(--heading); font-size: .98rem; }
.measure p { font-size: .88rem; color: var(--text-secondary); margin: 0; }
.measure strong { color: var(--text-primary); }

/* ---------- controls ---------- */
.controls { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; margin-bottom: 16px; }
.controls.compact { margin: 4px 0 8px; }
.controls label, label.inline { display: flex; flex-direction: column; gap: 4px; font-size: .78rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .04em; }
label.inline { flex-direction: row; align-items: center; gap: 8px; }
select, input[type="search"] {
  font: 500 .92rem var(--font-sans); color: var(--text-primary); text-transform: none; letter-spacing: 0;
  background: var(--surface-2); border: 1px solid var(--border-strong); border-radius: 8px; padding: 8px 10px; min-height: 40px; max-width: 100%;
}
select option { background: var(--surface-2); color: var(--text-primary); }
input[type="search"]::placeholder { color: var(--text-muted); }
input[type="search"] { width: 160px; }
.btn-link { background: none; border: none; color: var(--link); font: 500 .88rem var(--font-sans); cursor: pointer; padding: 6px 0; }
.btn-link:hover { text-decoration: underline; }
.tabs { display: inline-flex; background: var(--tab-track); border-radius: 8px; padding: 3px; margin: 6px 0 10px; border: 1px solid var(--border); }
.tabs button { border: none; background: none; font: 500 .86rem var(--font-sans); color: var(--text-secondary); padding: 7px 12px; border-radius: 6px; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--tab-active); color: var(--heading); box-shadow: 0 1px 2px rgba(0,0,0,.12); }

/* ---------- charts ---------- */
.chart { width: 100%; min-height: 120px; position: relative; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart:empty::before, .map:empty::before {
  content: "Loading chart…"; display: block; padding: 32px 0; color: var(--text-muted); font-size: .85rem; text-align: center;
}
.axis text { fill: var(--text-muted); font: 400 11.5px var(--font-sans); }
.axis path, .axis line { stroke: var(--grid); }
.axis .domain { stroke: none; }
.grid line { stroke: var(--grid); shape-rendering: crispEdges; }
.grid .domain { display: none; }
.axis-title { fill: var(--text-secondary); font: 500 11.5px var(--font-sans); }
.value-label { fill: var(--text-primary); font: 600 12px var(--font-sans); font-variant-numeric: tabular-nums; }
.cat-label { fill: var(--text-primary); font: 500 12.5px var(--font-sans); }
.ref-line { stroke: var(--text-muted); stroke-width: 1; stroke-dasharray: 4 3; }
.ref-label { fill: var(--text-muted); font: 500 11px var(--font-sans); }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: .82rem; color: var(--text-secondary); margin: 6px 0 4px; }
.legend .key { display: inline-flex; align-items: center; gap: 6px; }
.legend .sw { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.empty-state { color: var(--text-secondary); font-size: .9rem; padding: 18px 0; margin: 0; }

.tooltip {
  position: fixed; z-index: 200; pointer-events: none; max-width: 300px;
  background: var(--tooltip-bg); color: var(--tooltip-text); border: 1px solid var(--tooltip-border); border-radius: 8px; padding: 10px 12px;
  font-size: .82rem; line-height: 1.45; box-shadow: 0 6px 24px rgba(0,0,0,.28);
}
.tooltip .tt-title { font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
.tooltip .tt-row { display: flex; justify-content: space-between; gap: 14px; }
.tooltip .tt-row span:last-child { font-variant-numeric: tabular-nums; font-weight: 600; }
.tooltip .tt-note { color: var(--tooltip-muted); margin-top: 4px; font-size: .76rem; }

/* ---------- map ---------- */
.map-layout { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(260px, 1fr); gap: 20px; }
.map-card { margin-bottom: 20px; }
.map { width: 100%; aspect-ratio: 1 / 1; max-height: 680px; position: relative; }
.map svg { width: 100%; height: 100%; display: block; }
.zcta { stroke: var(--surface-1); stroke-width: .6; cursor: pointer; transition: opacity .15s; }
.zcta:hover { stroke: var(--map-hover); stroke-width: 1.5; }
.zcta.dim { opacity: .18; }
.zcta.selected { stroke: var(--select-ring); stroke-width: 2.4; }
.boro-outline { fill: none; stroke: var(--map-outline); stroke-width: 1.1; pointer-events: none; }
.map-legend { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; font-size: .8rem; color: var(--text-secondary); }
.map-legend strong { color: var(--text-primary); }
.map-legend .ramp { display: flex; height: 10px; border-radius: 3px; overflow: hidden; max-width: 360px; }
.map-legend .ramp span { flex: 1; }
.map-legend .ticks { display: flex; justify-content: space-between; max-width: 360px; font-variant-numeric: tabular-nums; }
.map-legend .na { display: inline-flex; align-items: center; gap: 6px; }
.map-legend .na i { width: 12px; height: 10px; display: inline-block; background: repeating-linear-gradient(45deg, var(--hatch-a) 0 3px, var(--hatch-b) 3px 5px); border-radius: 2px; }

.detail { margin-bottom: 20px; }
.detail h3 { font-family: var(--font-serif); font-size: 1.7rem; color: var(--heading); margin-bottom: 0; }
.detail .boro { color: var(--text-secondary); font-size: .9rem; margin-bottom: 12px; }
.detail dl { display: grid; grid-template-columns: 1fr auto; gap: 7px 12px; margin: 0; font-size: .9rem; }
.detail dt { color: var(--text-secondary); }
.detail dd { margin: 0; text-align: right; font-weight: 600; font-variant-numeric: tabular-nums; }
.detail dd small { font-weight: 400; color: var(--text-muted); }
.detail .group { grid-column: 1 / -1; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--eyebrow); margin-top: 8px; border-top: 1px solid var(--grid); padding-top: 10px; }
.detail .empty { color: var(--text-secondary); }
.badge { display: inline-block; font-size: .72rem; font-weight: 600; padding: 2px 8px; border-radius: 99px; background: var(--badge-bg); color: var(--badge-text); margin: 2px 4px 2px 0; }
.badge.warn { background: var(--warn-bg); color: var(--warn-text); }

/* ---------- tables ---------- */
.table-scroll { overflow-x: auto; }
.table-scroll.tall { max-height: 460px; overflow-y: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: .86rem; font-variant-numeric: tabular-nums; }
.data-table th, .data-table td { padding: 8px 10px; text-align: right; border-bottom: 1px solid var(--grid); white-space: nowrap; }
.data-table th:first-child, .data-table td:first-child, .data-table th.l, .data-table td.l { text-align: left; }
.data-table thead th { position: sticky; top: 0; background: var(--surface-1); color: var(--text-secondary); font-weight: 600; font-size: .78rem; z-index: 1; }
.data-table thead th.sortable { cursor: pointer; user-select: none; }
.data-table thead th.sortable:hover { color: var(--heading); }
.data-table thead th[aria-sort="ascending"]::after { content: " ▲"; font-size: .7em; }
.data-table thead th[aria-sort="descending"]::after { content: " ▼"; font-size: .7em; }
.data-table tbody tr.clickable { cursor: pointer; }
.data-table tbody tr.clickable:hover { background: var(--surface-hover); }
.data-table tbody tr.is-selected { background: var(--selected-row); }
.data-table tr.total td { font-weight: 700; border-top: 2px solid var(--border); }

/* ---------- methods ---------- */
.prose h3 { font-family: var(--font-serif); font-size: 1.35rem; color: var(--heading); margin-top: 1.8em; }
.prose p, .prose li { color: var(--text-secondary); }
.prose strong { color: var(--text-primary); }
.prose code, .formula { font-family: "Cascadia Code", Consolas, monospace; font-size: .86em; background: var(--surface-1); color: var(--text-primary); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; }
.formula { display: block; padding: 10px 14px; margin: 8px 0 14px; color: var(--heading); overflow-x: auto; white-space: pre; }
.source-list { display: grid; gap: 12px; }
.source-item { background: var(--surface-1); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; font-size: .9rem; }
.source-item h4 { margin: 0 0 4px; color: var(--heading); font-size: .98rem; }
.source-item dl { display: grid; grid-template-columns: 110px 1fr; gap: 3px 10px; margin: 6px 0 0; }
.source-item dt { color: var(--text-muted); }
.source-item dd { margin: 0; color: var(--text-secondary); }
.checks { display: grid; gap: 8px; }
.check { display: grid; grid-template-columns: 70px 1fr; gap: 12px; background: var(--surface-1); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; font-size: .88rem; }
.check .st { font-weight: 700; font-size: .72rem; letter-spacing: .05em; border-radius: 6px; text-align: center; padding: 3px 0; align-self: start; }
.check .st.pass { background: var(--pass-bg); color: var(--pass-text); }
.check .st.note { background: var(--badge-bg); color: var(--badge-text); }
.check .st.flag { background: var(--warn-bg); color: var(--warn-text); }
.check .st.fail { background: var(--fail-bg); color: var(--fail-text); }
.check h4 { margin: 0 0 3px; font-size: .92rem; color: var(--heading); }
.check p { margin: 0; color: var(--text-secondary); }

/* ---------- research log ---------- */
.timeline { display: grid; gap: 16px; }
.module { display: grid; grid-template-columns: 140px 1fr; gap: 20px; background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; box-shadow: var(--shadow); }
.module .status { font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--pass-text); }
.module .status.planned { color: var(--text-muted); }
.module .id { font-family: var(--font-serif); font-size: 1.6rem; color: var(--heading); }
.module h3 { color: var(--heading); }
.module p { color: var(--text-secondary); font-size: .92rem; margin-bottom: .5em; }
.module strong { color: var(--text-primary); }
.module.placeholder { border-style: dashed; box-shadow: none; background: transparent; }

/* ---------- states ---------- */
.load-error { border-left: 4px solid var(--fail-text); }
.load-error strong { color: var(--fail-text); }

/* ---------- footer ---------- */
.site-footer { background: var(--footer-bg); color: var(--footer-text); padding: 32px 0; font-size: .85rem; }
.site-footer strong { color: #fff; }
.site-footer p { margin: 0 0 .5em; }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .measures { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .map-layout { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .grid-2 { grid-template-columns: 1fr; gap: 0; }
  .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; position: absolute; top: 60px; left: 0; right: 0; flex-direction: column; background: var(--header-bg); padding: 8px 16px 16px; }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 12px; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  .header-inner { gap: 10px; }
  .brand-text { font-size: .95rem; }
  .hero { padding: 40px 0 32px; }
  .measures { grid-template-columns: 1fr; }
  .kpi .value { font-size: 1.35rem; }
  .card { padding: 16px; }
  .controls label { flex: 1 1 140px; }
  .controls select, .controls input[type="search"] { width: 100%; }
  .module { grid-template-columns: 1fr; gap: 6px; }
  .source-item dl { grid-template-columns: 1fr; }
  .check { grid-template-columns: 1fr; gap: 6px; }
  .check .st { width: 60px; }
}
@media (max-width: 360px) {
  .brand-text em { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ---------- sampling-uncertainty warning (text + icon, never colour alone) ---------- */
.uncertainty-warning { background: var(--warn-bg); color: var(--warn-text); border-radius: 8px; padding: 8px 10px; font-size: .84rem; font-weight: 500; margin: 8px 0 4px; }

/* ---------- visible uncertainty captions in ranking charts ---------- */
.bar-note { fill: var(--text-muted); font: 400 11px var(--font-sans); font-variant-numeric: tabular-nums; }
.bar-note.warn { fill: var(--warn-text); font-weight: 600; }
.data-note { font-size: .84rem; color: var(--text-secondary); background: var(--surface-band); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; margin: 10px 0 0; }
.data-note strong { color: var(--text-primary); }
.reading-guide { margin-top: 20px; }
.reading-guide ul { margin: 6px 0 0; padding-left: 1.2em; color: var(--text-secondary); font-size: .92rem; }
.reading-guide li { margin: 3px 0; }
.reading-guide strong { color: var(--text-primary); }
.map-legend .na i.x { background: repeating-linear-gradient(45deg, var(--hatch-a) 0 2px, var(--blue-450) 2px 3px), var(--hatch-a);
  background-image: repeating-linear-gradient(45deg, transparent 0 3px, var(--blue-450) 3px 4px), repeating-linear-gradient(-45deg, transparent 0 3px, var(--blue-450) 3px 4px); }
.zcta-excluded { stroke-dasharray: 2 1.5; }

/* ============================================================
   Policy simulator, policy context, About page (v0.4)
   Built only from existing tokens so both themes work unchanged.
   ============================================================ */
.sim-banner { background: var(--warn-bg); color: var(--warn-text); border-radius: 10px; padding: 12px 14px; font-size: .92rem; margin: 0 0 18px; }
.sim-banner strong { color: inherit; }
.sim-controls { align-items: flex-end; }
.seg { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 6px; border: 0; padding: 0; margin: 0; }
.seg legend { font-size: .78rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px; padding: 0; }
.seg button { font: 600 .92rem var(--font-sans); min-height: 40px; min-width: 56px; padding: 0 12px; border-radius: 8px; cursor: pointer;
  background: var(--surface-2); color: var(--text-primary); border: 1px solid var(--border-strong); }
.seg button[aria-pressed="true"] { background: var(--blue-500); border-color: var(--blue-500); color: #fff; }
:root[data-theme="dark"] .seg button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); }
:root[data-theme="dark"] .seg button[aria-pressed="true"] { color: #071427; }
.seg .seg-custom { display: flex; flex-direction: row; align-items: center; gap: 6px; text-transform: none; letter-spacing: 0; font-size: .86rem; font-weight: 500; color: var(--text-secondary); margin-left: 6px; }
.seg input[type="number"] { font: 500 .92rem var(--font-sans); width: 90px; min-height: 40px; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border-strong); background: var(--surface-2); color: var(--text-primary); }
.sim-narrative { color: var(--text-secondary); max-width: 820px; margin: 4px 0 18px; }
.sim-narrative strong { color: var(--text-primary); }
.map-trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 8px; }
.map-trio figure { margin: 0; min-width: 0; }
.map-trio figcaption { font-size: .82rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .04em; }
.map-sm { width: 100%; aspect-ratio: 1 / 1; position: relative; }
.map-sm svg { width: 100%; height: 100%; display: block; }
.map-sm .zcta { stroke-width: .4; }
.zcta-ring { fill: none; stroke: var(--text-primary); stroke-width: 1.4; pointer-events: none; }
.sim-legends { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.map-legend .na i.ring { width: 12px; height: 10px; display: inline-block; background: transparent; border: 1.5px solid var(--text-primary); border-radius: 2px; }
.mini-title { font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-secondary); margin: 0 0 6px; }
.grid-2.tight { gap: 14px; }
.grid-2.tight > div { min-width: 0; }
.data-table tr.sep td { text-align: left; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); background: var(--surface-band); }
.sim-method ul { margin: 6px 0 0; padding-left: 1.2em; }
.sim-method li { margin: 5px 0; color: var(--text-secondary); font-size: .9rem; }
.sim-method strong { color: var(--text-primary); }

.policy-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 20px; }
.policy-meta { font-size: .78rem; color: var(--text-muted); margin: 0 0 8px; }
.policy-placeholder { border: 1px dashed var(--border-strong); border-radius: 8px; padding: 12px 14px; margin: 6px 0 0; color: var(--text-secondary); font-size: .9rem; }
.policy-placeholder span { display: block; font-size: .8rem; color: var(--text-muted); margin-top: 2px; }
.policy-items { list-style: none; padding: 0; margin: 0; }
.policy-items li { border-top: 1px solid var(--grid); padding: 10px 0; }
.policy-items h4 { margin: 0 0 2px; color: var(--heading); }

.footer-links { margin: 0 0 .6em; }
.footer-links a { color: var(--hero-accent); }

/* ---------- About page ---------- */
.about-hero { padding: 48px 0 36px; }
.about-hero h1 { font-size: clamp(2rem, 4.2vw, 2.8rem); max-width: 22ch; }
.about-body { max-width: 760px; }
.about-body h2 { font-size: 1.45rem; margin-top: 1.6em; }
.about-body p, .about-body li { color: var(--text-secondary); }
.about-body strong { color: var(--text-primary); }
.about-intro { font-size: 1.12rem; color: var(--text-primary) !important; }
.about-question { border-left: 4px solid var(--accent); background: var(--surface-1); border-radius: 0 10px 10px 0; padding: 14px 18px; font-family: var(--font-serif); font-size: 1.15rem; color: var(--heading) !important; box-shadow: var(--shadow); }
.about-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 18px 0 6px; }
.about-interests { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; list-style: none; }
.about-interests li { background: var(--surface-1); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }

/* Seven nav items: switch to the menu button a little earlier than before */
@media (max-width: 1100px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; position: absolute; top: 60px; left: 0; right: 0; flex-direction: column; background: var(--header-bg); padding: 8px 16px 16px; }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px 12px; }
}
@media (max-width: 860px) {
  .map-trio { grid-template-columns: 1fr; }
  .sim-legends, .policy-grid, .about-interests, .about-facts { grid-template-columns: 1fr; }
}