:root {
  --paper: #ffffff;
  --paper-muted: #f7f7f8;
  --ink: #0d0d0d;
  --ink-subtle: #6e6e80;
  --pill: #ececf1;
  --line: #e5e5e5;
  --radius: 12px;
  --max: 720px;
  --max-wide: 960px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { color-scheme: light; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--paper-muted);
  color: var(--ink);
  font-size: 1.0625rem;
  line-height: 1.65;
  letter-spacing: -0.011em;
}
a { color: var(--ink); text-underline-offset: 0.12em; }
a:hover { color: #000; }
a:focus-visible,
button:focus-visible,
.nav-toggle-label:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}
.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--ink);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 100;
}
.skip:focus { left: 12px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 28px 20px 72px; }
.wrap.wide { max-width: var(--max-wide); }

header.site {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
header.site .inner {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.brand {
  font-weight: 650;
  letter-spacing: -0.03em;
  text-decoration: none;
  font-size: 1.05rem;
}
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle-label {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: var(--pill);
}
.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--ink);
  position: relative;
  border-radius: 1px;
}
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle-label span::before { top: -5px; }
.nav-toggle-label span::after { top: 5px; }
nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 2px;
}
nav a {
  margin-left: 4px;
  text-decoration: none;
  color: var(--ink-subtle);
  font-size: 0.9rem;
  padding: 6px 10px;
  border-radius: 999px;
}
nav a:hover,
nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--pill);
}

.hero {
  margin-bottom: 28px;
}
.hero h1 { margin-bottom: 10px; }
.pills { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}
.content-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  color: inherit;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
  min-height: 100%;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.content-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.06);
  text-decoration: none;
}
.content-card h3 {
  font-size: 1.12rem;
  letter-spacing: -0.025em;
  margin: 0;
}
.content-card p {
  margin: 0;
  color: var(--ink-subtle);
  font-size: 0.95rem;
}
.content-card .more {
  margin-top: auto;
  padding-top: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
}

h1 {
  font-size: clamp(1.85rem, 3.6vw, 2.5rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin: 0 0 12px;
  font-weight: 650;
}
h2 {
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  margin: 0 0 12px;
  letter-spacing: -0.03em;
  font-weight: 650;
}
h3 {
  font-size: 1.05rem;
  margin: 1.5em 0 0.4em;
  letter-spacing: -0.02em;
}
.lede {
  color: var(--ink-subtle);
  font-size: 1.12rem;
  line-height: 1.55;
  margin: 0 0 20px;
}
.section {
  margin: 36px 0 8px;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.section-head a {
  font-size: 0.9rem;
  color: var(--ink-subtle);
  text-decoration: none;
}
.section-head a:hover { color: var(--ink); }

.pill {
  display: inline-block;
  background: var(--pill);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--ink-subtle);
  font-weight: 500;
}
.btn {
  display: inline-block;
  background: var(--ink);
  color: #fff !important;
  text-decoration: none;
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.btn:hover { opacity: 0.92; }
.btn.secondary {
  background: var(--pill);
  color: var(--ink) !important;
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 8px; }
.meta { font-size: 13px; color: var(--ink-subtle); margin-bottom: 18px; }

.prose p { margin: 0 0 1em; }
.prose ul, .prose ol { margin: 0 0 1.1em; padding-left: 1.2em; }
.prose li { margin: 0.25em 0; }
.prose h2 { margin: 1.7em 0 0.55em; }
.prose h3 { margin: 1.25em 0 0.35em; }
.cite {
  font-size: 0.88rem;
  color: var(--ink-subtle);
}
.note {
  background: var(--paper-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.95rem;
  color: var(--ink-subtle);
  margin: 0 0 1.2em;
}

.stat-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  margin: 0 0 1.4em;
}
.stat-box {
  background: var(--paper-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
}
.stat-box .num {
  font-size: 1.28rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  display: block;
}
.stat-box .lbl {
  font-size: 12px;
  color: var(--ink-subtle);
  display: block;
  margin-top: 4px;
}
.stat-box .src {
  font-size: 11px;
  color: var(--ink-subtle);
  display: block;
  margin-top: 8px;
}

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin: 0 0 1.3em; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--ink-subtle); font-weight: 600; font-size: 0.8rem; text-transform: none; }
td em { color: var(--ink-subtle); font-style: italic; }

.grid { display: grid; gap: 14px; }
.grid.cards { grid-template-columns: 1fr; }

footer.site {
  max-width: var(--max-wide);
  margin: 0 auto;
  padding: 8px 20px 48px;
  color: var(--ink-subtle);
  font-size: 13px;
  line-height: 1.55;
}
footer.site p { margin: 0 0 8px; }
footer.site a { color: var(--ink-subtle); }
footer.site a:hover { color: var(--ink); }

@media (min-width: 640px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .grid.two, .grid.cards { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 900px) {
  .grid.cards.three { grid-template-columns: 1fr 1fr 1fr; }
}

@media (max-width: 719px) {
  .nav-toggle-label { display: flex; }
  nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 4px 0 10px;
  }
  nav a {
    margin: 0;
    padding: 10px 12px;
    border-radius: 8px;
  }
  .nav-toggle:checked ~ nav { display: flex; }
  header.site .inner { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .content-card { transition: none; }
}

/* ZIP Pulse stat chips */
.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 1.5em;
}
.stat-chip {
  flex: 1 1 140px;
  min-width: 132px;
  background: var(--paper-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 14px 12px;
}
.stat-chip .num {
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  display: block;
  line-height: 1.2;
}
.stat-chip .lbl {
  font-size: 12px;
  color: var(--ink-subtle);
  display: block;
  margin-top: 4px;
}
.stat-chip .src {
  font-size: 11px;
  color: var(--ink-subtle);
  display: block;
  margin-top: 8px;
}
.trend-list {
  margin: 0;
  padding-left: 1.2em;
}
.trend-list li { margin: 0.4em 0; }
.redirect-banner {
  background: var(--paper-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin: 0 0 1.2em;
}