:root {
  --green-900: #1e3a24;
  --green-700: #2f5d3a;
  --green-600: #3a7348;
  --green-100: #e8f2e9;
  --cream: #faf8f1;
  --paper: #ffffff;
  --ink: #22281f;
  --muted: #5c665a;
  --amber: #b97f1e;
  --amber-bg: #fdf4e3;
  --red: #a83a2a;
  --red-bg: #fbeeea;
  --border: #d9ded2;
  --radius: 10px;
  --maxw: 72rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--ink);
  background: var(--cream);
}

a { color: var(--green-700); }
a:hover { color: var(--green-900); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1rem; }

/* Header */
.site-header {
  background: var(--green-900);
  color: #fff;
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { font-weight: 700; font-size: 1.15rem; color: #fff; text-decoration: none; }
.brand span { color: #bfe3c4; }
nav.main-nav { display: flex; gap: 1rem; flex-wrap: wrap; }
nav.main-nav a { color: #dcefe0; text-decoration: none; font-size: 0.95rem; }
nav.main-nav a:hover { color: #fff; text-decoration: underline; }

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--green-900), var(--green-700));
  color: #fff;
  padding: 2.5rem 0 2rem;
}
.hero h1 { margin: 0 0 0.5rem; font-size: 1.9rem; line-height: 1.25; }
.hero p { margin: 0; max-width: 46rem; color: #e4f0e6; }
.hero .kicker {
  display: inline-block;
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em;
  background: rgba(255,255,255,0.15); padding: 0.2rem 0.6rem; border-radius: 999px;
  margin-bottom: 0.75rem;
}

/* Cards / calculators */
.calc-grid { display: grid; gap: 1.25rem; margin: 1.5rem 0; }
@media (min-width: 900px) {
  .calc-grid.two { grid-template-columns: 1fr 1fr; }
}

.card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(30,58,36,0.06);
}
.card h2 { margin-top: 0; font-size: 1.35rem; color: var(--green-900); }
.card h3 { color: var(--green-900); }

.field { margin-bottom: 0.9rem; }
.field label { display: block; font-weight: 600; margin-bottom: 0.25rem; }
.field .hint { font-size: 0.85rem; color: var(--muted); font-weight: 400; display: block; margin-top: 0.15rem; }
.field input[type="number"], .field select {
  width: 100%; max-width: 22rem;
  padding: 0.55rem 0.7rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
}
.field input[type="checkbox"] { width: 1.1rem; height: 1.1rem; margin-right: 0.4rem; vertical-align: middle; }
.check-row { display: flex; align-items: flex-start; gap: 0.25rem; margin-bottom: 0.6rem; }
.check-row label { font-weight: 500; }

.btn {
  display: inline-block;
  background: var(--green-700); color: #fff;
  border: none; border-radius: 6px;
  padding: 0.65rem 1.4rem;
  font-size: 1rem; font-weight: 600; cursor: pointer;
}
.btn:hover { background: var(--green-900); color: #fff; }

.result {
  margin-top: 1rem;
  background: var(--green-100);
  border: 1px solid #c4dcc7;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}
.result[hidden] { display: none; }
.result .big { font-size: 1.6rem; font-weight: 700; color: var(--green-900); }
.result dl { margin: 0.75rem 0 0; display: grid; grid-template-columns: auto 1fr; gap: 0.3rem 1rem; }
.result dt { font-weight: 600; }
.result dd { margin: 0; }

.caveat {
  margin-top: 0.9rem;
  background: var(--amber-bg);
  border-left: 4px solid var(--amber);
  padding: 0.7rem 1rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.92rem;
}
.caveat strong { color: #7c5410; }

.warn-box {
  background: var(--red-bg);
  border: 1px solid #eec3b8;
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}
.warn-box h2, .warn-box h3 { color: var(--red); margin-top: 0; }

/* Tables */
table.data { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.95rem; }
table.data th, table.data td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); }
table.data th { background: var(--green-100); color: var(--green-900); }
table.data tr:nth-child(even) td { background: #f7faf6; }
.table-scroll { overflow-x: auto; }

/* FAQ */
.faq details { background: var(--paper); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 0.6rem; padding: 0.8rem 1rem; }
.faq summary { font-weight: 600; cursor: pointer; color: var(--green-900); }
.faq p { margin: 0.5rem 0 0.25rem; }

/* Affiliate placeholder section */
.affiliate { border: 2px dashed var(--border); border-radius: var(--radius); padding: 1.25rem; margin: 2rem 0; background: #fff; }
.affiliate h2 { margin-top: 0; }
.affiliate .grid { display: grid; gap: 0.75rem; }
@media (min-width: 700px) { .affiliate .grid { grid-template-columns: repeat(3, 1fr); } }
.affiliate .item { border: 1px solid var(--border); border-radius: 8px; padding: 0.9rem; }
.affiliate .item a { font-weight: 600; }
.disclosure { font-size: 0.82rem; color: var(--muted); }

/* Footer */
.site-footer { background: var(--green-900); color: #cfe3d2; margin-top: 3rem; padding: 2rem 0; font-size: 0.9rem; }
.site-footer a { color: #eaf4eb; }
.site-footer p { margin: 0.4rem 0; }

/* Guides */
.guide-body { max-width: 48rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.guide-body h1 { color: var(--green-900); }
.breadcrumb { font-size: 0.85rem; color: var(--muted); margin: 1rem 0 0; }
.checklist li { margin-bottom: 0.6rem; }
.compare { display: grid; gap: 1rem; margin: 1.25rem 0; }
@media (min-width: 700px) { .compare { grid-template-columns: 1fr 1fr; } }
.compare .card h3 { margin-top: 0; }
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; font-size: 0.92rem; }
.pros-cons h4 { margin: 0 0 0.25rem; }