:root {
  --green-900: #123f2c;
  --green-700: #1f6f4a;
  --green-100: #e3f2e9;
  --ink: #1c2420;
  --muted: #55605a;
  --bg: #ffffff;
  --soft: #f4f8f5;
  --line: #dce6df;
  --radius: 14px;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
a { color: var(--green-700); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand { font-weight: 800; font-size: 1.1rem; color: var(--green-900); text-decoration: none; display: flex; align-items: center; gap: 10px; }
.brand img { width: 30px; height: 30px; }
nav.main { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
nav.main a { text-decoration: none; color: var(--ink); padding: 8px 12px; border-radius: 8px; font-size: 0.95rem; }
nav.main a:hover { background: var(--soft); }
.btn {
  display: inline-block;
  background: var(--green-700);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 700;
  border: 0;
  cursor: pointer;
}
.btn:hover { background: var(--green-900); color: #fff; }
.btn.secondary { background: #fff; color: var(--green-700); border: 2px solid var(--green-700); }
.hero { background: var(--soft); border-bottom: 1px solid var(--line); padding: 64px 0 56px; }
.hero h1 { font-size: clamp(2rem, 4.5vw, 3rem); line-height: 1.15; margin: 0 0 16px; color: var(--green-900); max-width: 20ch; }
.hero p.lede { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.hero .cta-row { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin: 32px 0; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; background: #fff; }
.card h3 { margin-top: 0; }
.card p { color: var(--muted); }
section.block { padding: 48px 0; }
h2 { color: var(--green-900); }
.meta-note { font-size: 0.9rem; color: var(--muted); }
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; margin: 0 0 18px; padding-left: 48px; position: relative; }
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--green-700);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
table.clean { width: 100%; border-collapse: collapse; margin: 20px 0; }
table.clean th, table.clean td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
table.clean th { background: var(--soft); }
.site-footer { border-top: 1px solid var(--line); background: var(--soft); padding: 40px 0; margin-top: 40px; font-size: 0.95rem; }
.site-footer .cols { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.site-footer a { color: var(--muted); text-decoration: none; display: block; margin: 4px 0; }
.disclaimer { background: #fff8e6; border: 1px solid #ecd9a0; border-radius: 10px; padding: 16px 18px; margin: 24px 0; }
.tool-box { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; background: #fff; margin: 20px 0; }
.tool-box label { display: block; font-weight: 700; margin: 12px 0 4px; }
.tool-box input, .tool-box select, .tool-box textarea { width: 100%; padding: 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
.tool-box button { margin-top: 14px; }
pre.prompt { background: #0f1f17; color: #d9f2e3; padding: 18px; border-radius: 10px; overflow-x: auto; white-space: pre-wrap; }
@media (max-width: 640px) {
  nav.main { display: none; }
  .hero { padding: 44px 0 36px; }
}