:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --ink: #14211c;
  --muted: #3c4b45;
  --line: #d9e0dc;
  --green: #0b5c45;
  --green-dark: #084433;
  --green-soft: #e6f3ee;
  --danger: #8b2e2e;
  --danger-bg: #fdf2f2;
  --shadow: 0 12px 40px rgba(20, 33, 28, 0.06);
  --serif: "Source Serif 4", "Iowan Old Style", Palatino, serif;
  --sans: "Source Sans 3", "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
}
img { max-width: 100%; }
a { color: var(--green-dark); }
a:hover { color: var(--green); }
:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 2px;
}
.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: #fff;
  padding: 0.5rem 0.8rem;
  z-index: 2;
}
.skip:focus { top: 1rem; }

.wrap { width: min(1080px, calc(100% - 2rem)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(244, 246, 245, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.site-header .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  align-items: center;
  min-height: 4.25rem;
  padding: 0.75rem 0;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand svg { display: block; flex: none; }
.nav { display: flex; gap: 0.35rem 1.15rem; flex-wrap: wrap; align-items: center; }
.nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.2rem 0;
}
.nav a[aria-current="page"] { color: var(--green-dark); box-shadow: inset 0 -2px 0 var(--green); }

main { padding-bottom: 3rem; }
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: start;
  padding: 3.25rem 0 2.5rem;
}
.kicker {
  margin: 0 0 0.75rem;
  color: var(--green-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1, h2, h3 { font-family: var(--serif); font-weight: 650; letter-spacing: -0.03em; line-height: 1.15; color: var(--ink); }
h1 { font-size: clamp(2.4rem, 5vw, 3.7rem); margin: 0 0 1rem; }
h2 { font-size: clamp(1.7rem, 3vw, 2.2rem); margin: 0 0 0.75rem; }
h3 { font-size: 1.25rem; margin: 0 0 0.35rem; font-family: var(--sans); font-weight: 700; letter-spacing: -0.02em; }
.lede { font-size: 1.2rem; color: var(--muted); margin: 0 0 1.25rem; }
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin: 0 0 0.75rem; }
.button, button.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  background: var(--green);
  color: #fff;
  text-decoration: none;
  border: 1px solid var(--green);
  border-radius: 999px;
  padding: 0.55rem 1.15rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.button.secondary { background: transparent; color: var(--green-dark); }
.button:hover { background: var(--green-dark); color: #fff; border-color: var(--green-dark); }
.button:disabled { opacity: 0.6; cursor: wait; }
.fine, .note { color: var(--muted); font-size: 0.95rem; }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 1.25rem;
}
.panel h2 { font-size: 1.55rem; }
label { display: block; font-weight: 700; font-size: 0.92rem; margin: 0.85rem 0 0.35rem; }
.lookup-row { display: flex; gap: 0.5rem; }
.lookup-row input { flex: 1; min-width: 0; width: auto; }
input[type="text"], textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  color: inherit;
}
textarea { min-height: 8rem; resize: vertical; }
.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.9rem 0; }
.chips button {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  text-align: left;
}
.chips button:hover { border-color: var(--green); color: var(--green-dark); }
.result { min-height: 7rem; }
.result dl { display: grid; grid-template-columns: 7.5rem 1fr; gap: 0.35rem 0.75rem; margin: 0; }
.result dt { color: var(--muted); }
.result dd { margin: 0; font-weight: 700; }
.bad { color: var(--danger); background: var(--danger-bg); border-radius: 10px; padding: 0.75rem 0.85rem; }

.notice {
  background: var(--green-soft);
  border: 1px solid #c9e2d8;
  border-radius: 12px;
  padding: 0.9rem 1rem;
  margin: 0 0 2rem;
}
section { padding: 0.5rem 0 2.75rem; }
.grid-3, .grid-2 { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: 1fr 1fr; }
.card, .plan {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.15rem 1.15rem 0.4rem;
}
.plan { padding: 1.35rem; box-shadow: var(--shadow); }
.plan.featured { border-color: var(--green); box-shadow: 0 0 0 3px rgba(11, 92, 69, 0.12), var(--shadow); }
.price { font-family: var(--serif); font-size: 2.8rem; margin: 0.2rem 0; letter-spacing: -0.03em; }
.price span { font-family: var(--sans); font-size: 1rem; font-weight: 600; color: var(--muted); }
ul { padding-left: 1.15rem; }
li { margin: 0.4rem 0; }
.prose { width: min(740px, 100%); }
.prose h2 { margin-top: 2.1rem; }
.prose h1 { margin-top: 0.5rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.98rem; }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: 0.65rem 0.4rem; vertical-align: top; }
th { font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
pre {
  background: var(--ink);
  color: #f4f7f5;
  border-radius: 14px;
  padding: 1rem 1.1rem;
  overflow: auto;
  font-family: var(--mono);
  font-size: 0.95rem;
  line-height: 1.7;
}
.formula { color: #b7e4d4; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.site-footer p { margin: 0 0 0.6rem; max-width: 46rem; }

@media (max-width: 840px) {
  .hero, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero { padding-top: 2rem; }
  .lookup-row { flex-direction: column; }
  .result dl { grid-template-columns: 1fr; }
  .result dd { margin-bottom: 0.45rem; }
  .site-footer .wrap { flex-direction: column; }
}