/* WhichMailbox — mobile-first, one accent, readable as files or on a host */
:root {
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e0d6;
  --paper: #f7f4ef;
  --card: #fffcf7;
  --accent: #0e6b63;
  --accent-ink: #094a45;
  --accent-soft: #e6f3f1;
  --warn: #7c2d12;
  --warn-bg: #fef3c7;
  --ok-bg: #ecfdf5;
  --no-bg: #fef2f2;
  --radius: 10px;
  --max: 44rem;
  --wide: 58rem;
  --font: "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", Times, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
}

a { color: var(--accent); }
a:hover { color: var(--accent-ink); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 20;
  background: var(--card);
  padding: 0.5rem 0.75rem;
}

.wrap { width: min(100% - 2rem, var(--max)); margin-inline: auto; }
.wrap-wide { width: min(100% - 2rem, var(--wide)); margin-inline: auto; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--card);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  width: min(100% - 2rem, var(--wide));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}
.brand {
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.15rem;
  line-height: 1.2;
}
.brand span { display: block; font-family: var(--sans); font-weight: 500; font-size: 0.72rem; color: var(--muted); letter-spacing: 0; }
.nav-toggle { display: none; }
.nav-btn {
  font: inherit;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}
.nav-btn:hover { border-color: var(--accent); }
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1rem;
}
.site-nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.9rem;
}
.site-nav a[aria-current="page"] { color: var(--accent); font-weight: 650; }
.site-nav a:hover { color: var(--accent); }

@media (max-width: 860px) {
  .nav-btn { display: inline-block; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--card);
    border-bottom: 1px solid var(--line);
    padding: 0.5rem 1rem 1rem;
  }
  .nav-toggle:checked ~ .site-nav { display: block; }
  .site-nav ul { flex-direction: column; gap: 0.35rem; }
  .site-nav a { display: block; padding: 0.35rem 0; }
}
@media (min-width: 861px) {
  .nav-btn { display: none; }
}

/* Hero / page */
main { padding: 1.75rem 0 3rem; }
h1, h2, h3, h4 {
  font-family: var(--font);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 700;
}
h1 { font-size: clamp(1.7rem, 4.4vw, 2.35rem); margin: 0 0 0.75rem; }
h2 { font-size: 1.4rem; margin: 2.1rem 0 0.6rem; }
h3 { font-size: 1.12rem; margin: 1.4rem 0 0.4rem; }
p, li { max-width: 65ch; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 62ch; }
.kicker {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 650;
  margin: 0 0 0.4rem;
}

.note, .warn, .ok {
  padding: 0.9rem 1rem;
  border-radius: var(--radius);
  margin: 1.1rem 0;
  border: 1px solid var(--line);
  background: var(--card);
}
.warn { background: var(--warn-bg); border-color: #f6d889; }
.warn strong { color: var(--warn); }
.ok { background: var(--ok-bg); border-color: #a7f3d0; }

.cards {
  display: grid;
  gap: 0.85rem;
  margin: 1.25rem 0;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .cards.cols-2, .cards.cols-3 { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 900px) {
  .cards.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  text-decoration: none;
  color: inherit;
  display: block;
}
a.card:hover { border-color: var(--accent); }
.card h3 { margin-top: 0; }
.card p { margin: 0.3rem 0 0; color: var(--muted); font-size: 0.95rem; }
.card .meta { font-size: 0.8rem; color: var(--accent); margin-top: 0.55rem; font-weight: 650; }

.table-wrap { overflow-x: auto; margin: 1rem 0 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 36rem; }
th, td { text-align: left; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--accent-soft); font-weight: 650; }
tr:last-child td { border-bottom: 0; }
.yes { color: #065f46; font-weight: 650; }
.no { color: #9f1239; font-weight: 650; }
.maybe { color: #92400e; font-weight: 650; }

.toc { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.9rem 1.1rem; margin: 1.2rem 0; }
.toc h2 { margin: 0 0 0.4rem; font-size: 1rem; }
.toc ol { margin: 0; padding-left: 1.2rem; }
.toc li { margin: 0.2rem 0; }

.sources { font-size: 0.9rem; color: var(--muted); }
.sources a { word-break: break-word; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  padding: 0.55rem 0.95rem;
  border-radius: 8px;
  font-weight: 650;
  font-size: 0.95rem;
}
.btn:hover { background: var(--accent-ink); }
.btn.ghost {
  background: transparent;
  color: var(--accent) !important;
  border: 1px solid var(--accent);
}
.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0; }

ul.check { padding-left: 1.15rem; }
ul.check li { margin: 0.35rem 0; }

.breadcrumbs { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.8rem; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--accent); }

.updated { font-size: 0.85rem; color: var(--muted); }

footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 1.6rem 0 2.2rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.footer-grid {
  width: min(100% - 2rem, var(--wide));
  margin-inline: auto;
  display: grid;
  gap: 1.2rem;
}
@media (min-width: 720px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
}
footer h2 { font-size: 0.85rem; margin: 0 0 0.4rem; font-family: var(--sans); letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink); }
footer ul { list-style: none; margin: 0; padding: 0; }
footer li { margin: 0.2rem 0; }
footer a { color: var(--ink); text-decoration: none; }
footer a:hover { color: var(--accent); }
.fine { font-size: 0.82rem; max-width: none; }

.hero-grid {
  display: grid;
  gap: 1.2rem;
}
@media (min-width: 860px) {
  .hero-grid { grid-template-columns: 1.3fr 0.9fr; align-items: start; }
}

dl.facts dt { font-weight: 650; margin-top: 0.7rem; }
dl.facts dd { margin: 0.15rem 0 0; color: var(--muted); }

.small { font-size: 0.9rem; color: var(--muted); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.88em; background: var(--accent-soft); padding: 0.05em 0.3em; border-radius: 4px; }