:root {
  --ink: #1b2422;
  --muted: #3e524c;
  --paper: #f3efe4;
  --paper-2: #fffdf8;
  --line: #d7d0c2;
  --water: #0f4c5c;
  --water-2: #1a7a78;
  --reed: #a9782d;
  --moss: #2f6b45;
  --safety: #7a2e2e;
  --safety-bg: #f8ece6;
  --shadow: 0 18px 40px rgba(23, 42, 40, 0.08);
  --serif: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 420px at 10% -10%, rgba(26, 122, 120, 0.16), transparent 60%),
    linear-gradient(180deg, #e7f2ef 0%, var(--paper) 280px);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.6;
}
a { color: var(--water); }
a:hover { color: var(--water-2); }
img { max-width: 100%; height: auto; }
.skip {
  position: absolute; left: 1rem; top: -4rem; background: var(--ink); color: white; padding: 0.5rem 0.8rem;
}
.skip:focus { top: 0.5rem; z-index: 5; }

.site-header, .site-footer, main { width: min(1080px, calc(100% - 2rem)); margin-inline: auto; }
.site-header {
  display: flex; justify-content: space-between; gap: 1.5rem; align-items: end; padding: 1.2rem 0 0.8rem;
}
.brand { display: flex; gap: 0.75rem; align-items: center; text-decoration: none; color: var(--ink); }
.brand strong { font-family: var(--serif); font-size: 1.35rem; font-weight: 700; display: block; line-height: 1.1; }
.brand small { display: block; color: var(--muted); font-size: 0.82rem; margin-top: 0.15rem; }
.mark { width: 46px; height: 46px; flex: none; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 0.35rem 0.9rem; justify-content: flex-end; }
.site-header nav a { text-decoration: none; color: var(--ink); font-size: 0.95rem; }
.site-header nav a[aria-current="page"] { color: var(--water); box-shadow: inset 0 -2px 0 var(--reed); }

.hero { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 2rem; align-items: center; padding: 1.5rem 0 0.5rem; }
.eyebrow, .kicker { letter-spacing: 0.08em; text-transform: uppercase; color: var(--reed); font-size: 0.78rem; font-weight: 700; margin: 0 0 0.4rem; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(2.1rem, 4vw, 3.5rem); margin: 0 0 0.6rem; }
.dek, .lede { font-size: 1.15rem; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.2rem; }
.button, button.primary, button.choice {
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0.55rem 1rem;
  border-radius: 999px; text-decoration: none; border: 2px solid var(--water); font: inherit; cursor: pointer;
}
.button, button.primary { background: var(--water); color: white; }
.button.secondary, button.choice { background: transparent; color: var(--water); }
button.choice.accept, button.choice.reject { min-width: 8.5rem; background: white; color: var(--ink); border-color: var(--ink); }
.pool {
  height: 220px; border-radius: 46% 54% 48% 52%;
  background:
    radial-gradient(circle at 50% 40%, rgba(255,255,255,0.55), transparent 28%),
    radial-gradient(circle at 50% 60%, #8fd0c8, #14656a 62%, #0c3b46);
  box-shadow: inset 0 -20px 30px rgba(0,0,0,0.15), var(--shadow);
  position: relative;
}
.pool span { position: absolute; left: 18%; right: 18%; height: 2px; background: rgba(255,255,255,0.45); border-radius: 99px; }
.pool span:nth-child(1) { top: 38%; }
.pool span:nth-child(2) { top: 52%; left: 26%; right: 26%; }
.pool span:nth-child(3) { top: 66%; left: 34%; right: 34%; }

.panel, .article, .card, .product, .callout, .planner {
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow);
}
.paths, .library, .related, .planner-wrap { margin: 1.6rem 0; }
.paths { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; }
.card { display: block; padding: 1rem 1.05rem; text-decoration: none; color: inherit; }
.card span, .meta span { color: var(--reed); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }
.card strong { display: block; font-family: var(--serif); font-size: 1.25rem; margin: 0.25rem 0; }
.card p { margin: 0; color: var(--muted); }
.section-head { margin: 2rem 0 0.7rem; }
.section-head h2 { margin: 0; font-size: 1.8rem; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.8rem; }

.planner { padding: 1.1rem; }
.planner h2 { margin-top: 0; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.92rem; font-weight: 650; }
input, select, textarea {
  font: inherit; color: inherit; background: white; border: 1px solid #b7c3bf; border-radius: 10px; padding: 0.55rem 0.65rem; min-height: 44px;
}
textarea { min-height: 140px; }
.unit-row { display: flex; gap: 0.4rem; align-items: center; }
.unit-row button[aria-pressed="true"] { background: var(--water); color: white; }
.results { margin-top: 1rem; padding: 0.2rem; }
.results dl { display: grid; grid-template-columns: 11rem 1fr; gap: 0.35rem 0.8rem; margin: 0.6rem 0; }
.results dt { font-weight: 700; }
.note, .callout, .disclosure, .product, .notice { padding: 0.85rem 1rem; }
.disclosure, .notice { background: #f7f1df; border-left: 4px solid var(--reed); margin: 0 0 1rem; }
.callout { background: var(--safety-bg); border-left: 4px solid var(--safety); }
.product { margin: 1rem 0; }
.product h3 { margin-top: 0; }
.untested { font-size: 0.92rem; color: var(--muted); }

.article { padding: 1.3rem 1.3rem 1.5rem; margin: 1rem 0 2rem; }
.prose h2 { margin-top: 1.6rem; }
.prose h3 { margin-top: 1.2rem; }
.prose li { margin: 0.25rem 0; }
.diagram { margin: 1rem 0; background: #e7f3f1; border-radius: 16px; padding: 0.6rem; }
blockquote { margin: 1rem 0; padding-left: 0.9rem; border-left: 3px solid var(--water-2); color: var(--muted); }
.meta { display: flex; flex-wrap: wrap; gap: 0.8rem; color: var(--muted); font-size: 0.92rem; }

.site-footer { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 1rem; padding: 1.5rem 0 2.5rem; color: var(--muted); }
.site-footer a { display: block; margin: 0.2rem 0; }
.site-footer strong { color: var(--ink); }

.banner {
  position: sticky; bottom: 0; display: flex; justify-content: space-between; gap: 1rem; align-items: center;
  background: var(--ink); color: white; padding: 0.8rem 1rem; z-index: 4;
}
.banner p { margin: 0; max-width: 46rem; }
.banner a { color: #d7efe8; }
.banner[hidden] { display: none; }
.honeypot { position: absolute; left: -9999px; height: 0; overflow: hidden; }

@media (max-width: 800px) {
  .hero, .paths, .cards, .site-footer, .grid, .results dl { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; align-items: start; }
  .banner { flex-direction: column; align-items: stretch; }
  .article { padding: 1rem; }
}