:root {
  --bg: #F7F0E4;
  --bg-card: #FFFBF4;
  --ink: #1A1A17;
  --muted: #5C584F;
  --line: #E4D6C0;
  --green: #1F4D3A;
  --green-deep: #143328;
  --gold: #E8A838;
  --terracotta: #C45C26;
  --cream: #F4E6C8;
  --ok: #1F4D3A;
  --warn: #9A3412;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(31, 77, 58, 0.08);
  --max: 1080px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --display: Georgia, "Times New Roman", serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #f4d7a8 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #cfe0d5 0%, transparent 50%),
    var(--bg);
  line-height: 1.55;
}
img { max-width: 100%; height: auto; }
a { color: var(--green); }
a:hover { color: var(--terracotta); }
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--green); color: #fff; padding: .5rem 1rem; z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }
.site-header {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(10px);
  background: rgba(247, 240, 228, 0.92);
  border-bottom: 1px solid var(--line);
}
.header-inner, .wrap, .footer-inner {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .85rem 0;
}
.brand {
  display: flex; align-items: center; gap: .65rem; text-decoration: none; color: var(--ink); font-weight: 700;
}
.brand-mark {
  width: 2rem; height: 2rem; border-radius: 9px; background: var(--green); color: var(--cream);
  display: grid; place-items: center; font-size: .75rem; letter-spacing: .02em;
}
.brand small { display: block; font-weight: 500; color: var(--muted); font-size: .72rem; }
#nav-toggle {
  display: none; border: 1px solid var(--line); background: var(--bg-card); border-radius: 10px; padding: .45rem .7rem;
}
#site-nav { display: flex; flex-wrap: wrap; gap: .55rem .9rem; }
#site-nav a {
  text-decoration: none; color: var(--muted); font-size: .92rem; font-weight: 600;
}
#site-nav a:hover, #site-nav a[aria-current="page"] { color: var(--green-deep); }
.unofficial-banner {
  background: var(--green-deep); color: #f7f0e4; font-size: .88rem;
}
.unofficial-banner .wrap { padding: .55rem 0; }
.unofficial-banner a { color: var(--gold); }
.hero {
  padding: 2.4rem 0 1.4rem;
  display: grid; gap: 1.4rem;
}
@media (min-width: 860px) {
  .hero { grid-template-columns: 1.3fr .9fr; align-items: end; }
}
.eyebrow {
  display: inline-flex; gap: .4rem; align-items: center;
  color: var(--terracotta); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; font-size: .75rem;
}
h1, h2, h3 { font-family: var(--display); line-height: 1.2; margin: 0 0 .6rem; }
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); margin-top: 2rem; }
h3 { font-size: 1.15rem; }
.lede { font-size: 1.08rem; color: var(--muted); max-width: 42rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.1rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  border-radius: 999px; padding: .7rem 1.15rem; text-decoration: none; font-weight: 700; border: 1px solid transparent;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-deep); color: #fff; }
.btn-secondary { background: var(--bg-card); color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { border-color: var(--green); color: var(--green); }
.card-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin: 1.2rem 0 2rem;
}
.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.15rem; box-shadow: var(--shadow); text-decoration: none; color: inherit;
}
.card:hover { border-color: #c9d8cf; transform: translateY(-1px); }
.card h3 { margin-bottom: .35rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.meta {
  display: flex; flex-wrap: wrap; gap: .5rem .9rem; color: var(--muted); font-size: .88rem; margin: .8rem 0 1.2rem;
}
.meta strong { color: var(--ink); }
.prose { max-width: 46rem; }
.prose p, .prose li { color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.2rem; }
.table-wrap { overflow-x: auto; margin: 1rem 0 1.5rem; border: 1px solid var(--line); border-radius: 12px; background: var(--bg-card); }
table { width: 100%; border-collapse: collapse; min-width: 640px; font-size: .92rem; }
th, td { padding: .7rem .8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #f0e7d6; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
tr:last-child td { border-bottom: 0; }
.source-note, .calc-note, .footnote {
  font-size: .88rem; color: var(--muted); background: #f3ecde; border-left: 3px solid var(--gold);
  padding: .75rem .9rem; border-radius: 0 10px 10px 0; margin: 1rem 0 1.5rem;
}
.disclaimer {
  background: #fff7ed; border: 1px solid #fdba74; border-radius: 12px; padding: 1rem 1.1rem; margin: 1.2rem 0;
}
.callout {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.1rem; margin: 1rem 0;
}
.stat-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: .8rem; margin: 1rem 0 1.5rem;
}
.stat {
  background: var(--green-deep); color: #f7f0e4; border-radius: 12px; padding: .9rem 1rem;
}
.stat b { display: block; font-size: 1.35rem; font-family: var(--display); color: var(--gold); }
.stat span { font-size: .85rem; opacity: .9; }
.site-footer {
  margin-top: 3rem; border-top: 1px solid var(--line); background: #efe6d4; padding: 2rem 0 2.5rem;
}
.footer-inner { display: grid; gap: 1rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .7rem 1rem; }
.footer-links a { text-decoration: none; color: var(--muted); font-weight: 600; font-size: .9rem; }
.faq details {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 12px; padding: .85rem 1rem; margin: .65rem 0;
}
.faq summary { cursor: pointer; font-weight: 700; }
.calc-box {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 16px; padding: 1.2rem; box-shadow: var(--shadow);
}
.calc-grid {
  display: grid; gap: .9rem; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
label { display: grid; gap: .35rem; font-size: .88rem; font-weight: 600; color: var(--muted); }
select, input[type="number"], input[type="range"] {
  width: 100%; font: inherit; color: var(--ink); border: 1px solid var(--line); border-radius: 10px; padding: .65rem .7rem; background: #fff;
}
.calc-dl { display: grid; gap: .55rem; margin: 1rem 0 0; }
.calc-dl > div {
  display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px dashed var(--line); padding-bottom: .45rem;
}
.calc-dl dt { color: var(--muted); }
.calc-dl dd { margin: 0; font-weight: 700; }
.calc-highlight { background: #edf5f0; border: 1px solid #c9d8cf; border-radius: 10px; padding: .55rem .7rem !important; border-bottom: 0 !important; }
.breadcrumb { font-size: .88rem; color: var(--muted); margin: 1rem 0 0; }
.breadcrumb a { text-decoration: none; }
@media (max-width: 760px) {
  #nav-toggle { display: inline-flex; }
  #site-nav {
    display: none; position: absolute; left: 1rem; right: 1rem; top: 4.1rem;
    background: var(--bg-card); border: 1px solid var(--line); border-radius: 14px; padding: .8rem;
    flex-direction: column; box-shadow: var(--shadow);
  }
  #site-nav.open { display: flex; }
}