:root {
  --bg: #efece4;
  --paper: #fbf9f4;
  --ink: #1b2430;
  --muted: #5e6872;
  --line: #ddd6c8;
  --accent: #0c6b58;
  --accent-dark: #084c3e;
  --accent-wash: #e5f3ef;
  --warn-wash: #f8efe4;
  --warn: #8a4b12;
  --shadow: 0 1px 0 rgba(27, 36, 48, 0.04), 0 16px 40px -28px rgba(27, 36, 48, 0.45);
  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Source Sans 3", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(12, 107, 88, 0.05), transparent 220px),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
}
img { max-width: 100%; }
a { color: var(--accent-dark); }
button, input, select { font: inherit; }
button { cursor: pointer; }
h1, h2, h3 { font-family: var(--serif); font-weight: 560; letter-spacing: -0.02em; line-height: 1.15; }
h1 { font-size: clamp(2rem, 4vw, 3.15rem); margin: 0 0 12px; }
h2 { font-size: 1.55rem; margin: 0 0 10px; }
h3 { font-size: 1.15rem; margin: 0 0 8px; }

.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 14px 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
}
.logo { font-family: var(--serif); font-size: 1.35rem; font-weight: 600; color: var(--ink); text-decoration: none; }
.logo span { color: var(--accent); }
.nav { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; font-weight: 600; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav-btn { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: var(--paper); border-radius: 10px; }
.nav-btn span { display: block; width: 16px; height: 1.5px; margin: 4px auto; background: var(--ink); }

.hero { padding: 18px 0 8px; }
.kicker {
  display: inline-block; margin-bottom: 12px; padding: 4px 10px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--paper);
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.04em; color: var(--accent-dark);
}
.lede { max-width: 68ch; color: var(--muted); font-size: 1.08rem; margin: 0 0 22px; }

.grid-tools { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 8px 0 20px; }
.tool-card {
  display: block; text-decoration: none; color: inherit; background: var(--paper);
  border: 1px solid var(--line); border-radius: 16px; padding: 18px 18px 16px; box-shadow: var(--shadow);
}
.tool-card:hover { border-color: #c9ddd6; }
.tool-card .where { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
.tool-card h2 { font-size: 1.2rem; margin: 6px 0; }
.tool-card p { margin: 0; color: var(--muted); }

.layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.85fr); gap: 18px; align-items: start; margin-bottom: 28px; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 16px; padding: 18px; box-shadow: var(--shadow); }
.card.sticky { position: sticky; top: 76px; }
label { display: block; font-weight: 650; font-size: 0.92rem; margin-bottom: 6px; }
.field { margin-bottom: 14px; }
.hint { display: block; margin-top: 4px; color: var(--muted); font-size: 0.82rem; font-weight: 500; }
input[type="number"], select {
  width: 100%; min-height: 44px; padding: 8px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 600; min-height: 44px; }
.check input { width: 18px; height: 18px; }

.figure { font-family: var(--serif); font-size: clamp(2rem, 4vw, 2.7rem); margin: 4px 0 2px; }
.figure small { font-family: var(--sans); font-size: 0.95rem; color: var(--muted); font-weight: 600; }
.splits { list-style: none; margin: 14px 0 0; padding: 0; }
.splits li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); font-variant-numeric: tabular-nums; }
.note { background: var(--warn-wash); color: var(--warn); border-radius: 10px; padding: 10px 12px; font-size: 0.88rem; margin-top: 12px; }
.good { background: var(--accent-wash); color: var(--accent-dark); }

.prose { max-width: 74ch; padding-bottom: 20px; }
.prose p, .prose li { color: var(--ink); }
.prose li { margin: 6px 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; margin: 10px 0 16px; background: var(--paper); }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.78rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.faq details { border-top: 1px solid var(--line); padding: 10px 0; }
.faq summary { cursor: pointer; font-weight: 700; }
.foot { border-top: 1px solid var(--line); margin-top: 20px; padding: 22px 0 36px; color: var(--muted); font-size: 0.92rem; }
.foot a { margin-right: 12px; }
.crumbs { color: var(--muted); font-size: 0.88rem; margin-bottom: 8px; }
.crumbs a { color: var(--muted); }

.country-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 8px; }
.country-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 8px 16px;
  border-radius: 999px; border: 1px solid var(--line); background: var(--paper);
  color: var(--ink); text-decoration: none; font-weight: 700;
}
.country-nav a.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.country-block { margin: 8px 0 28px; scroll-margin-top: 76px; }
.country-block > h2 { margin-top: 4px; }
.block-intro { color: var(--muted); margin: 0 0 12px; max-width: 68ch; }
.subhead { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent-dark); margin: 16px 0 8px; }
body[data-show="us"] .country-block:not([data-country="us"]),
body[data-show="uk"] .country-block:not([data-country="uk"]),
body[data-show="ca"] .country-block:not([data-country="ca"]),
body[data-show="au"] .country-block:not([data-country="au"]) { display: none; }

@media (max-width: 860px) {
  .grid-tools, .layout, .row2 { grid-template-columns: 1fr; }
  .card.sticky { position: static; }
  .nav-btn { display: inline-block; }
  .nav { display: none; position: absolute; top: 64px; left: 16px; right: 16px; flex-direction: column; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 10px; }
  body.nav-open .nav { display: flex; }
  .nav a { padding: 10px 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}