:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --ink: #1a2332;
  --muted: #5b6b82;
  --brand: #007a3d;
  --brand-dark: #005c2e;
  --line: #e3e8f0;
  --radius: 14px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 18px; }

.site-header { background: var(--card); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { font-weight: 800; font-size: 1.25rem; color: var(--ink); text-decoration: none; }
.logo span { color: var(--brand); }
.site-header nav a { color: var(--muted); text-decoration: none; font-weight: 600; }
.site-header nav a:hover { color: var(--brand); }

h1 { font-size: 1.9rem; margin: 1.6rem 0 0.4rem; letter-spacing: -0.01em; }
.lede { color: var(--muted); font-size: 1.05rem; margin-top: 0; }

.calc {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin: 1.4rem 0;
  box-shadow: 0 2px 12px rgba(0, 122, 61, 0.07);
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 520px) { .grid2 { grid-template-columns: 1fr; } }
.field { margin-bottom: 16px; }
.field label, .field .label { display: block; font-weight: 700; margin-bottom: 8px; }
.field input, .field select {
  width: 100%;
  font-size: 1.05rem;
  padding: 11px 13px;
  border: 2px solid var(--line);
  border-radius: 10px;
  background: #fff;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--brand); }
.mini-hint { font-size: 0.85rem; color: var(--muted); margin: 6px 0 0; }
.hidden { display: none !important; }

.segmented { display: flex; gap: 8px; }
.segmented button {
  flex: 1 1 0;
  padding: 11px 10px;
  font-size: 0.98rem;
  font-weight: 700;
  background: var(--bg);
  color: var(--ink);
  border: 2px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
}
.segmented button.active { border-color: var(--brand); background: #e6f4ec; color: var(--brand-dark); }

.cta {
  width: 100%;
  padding: 14px;
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  background: var(--brand);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 4px;
}
.cta:hover { background: var(--brand-dark); }

.results {
  margin-top: 18px;
  text-align: center;
  background: var(--bg);
  border: 2px dashed var(--brand);
  border-radius: 10px;
  padding: 18px 14px;
}
.result-label { display: block; color: var(--muted); font-size: 0.92rem; margin-bottom: 6px; }
.cf-code {
  display: block;
  font-size: 1.9rem;
  letter-spacing: 0.12em;
  font-family: "SF Mono", Consolas, monospace;
  color: var(--brand-dark);
  word-break: break-all;
}
.copy {
  margin-top: 10px;
  padding: 8px 22px;
  font-weight: 700;
  background: #fff;
  border: 2px solid var(--brand);
  color: var(--brand-dark);
  border-radius: 8px;
  cursor: pointer;
}
.hint { color: #b3261e; font-size: 0.9rem; margin: 10px 0 0; min-height: 1.2em; }

.privacy-note {
  background: #eef6ee; border: 1px solid #cfe6cf; color: #2c5e2c;
  border-radius: 10px; padding: 10px 14px; font-size: 0.92rem;
}
.info h2, .faq h2 { margin-top: 2.2rem; font-size: 1.35rem; }
.info h3 { font-size: 1.08rem; margin-bottom: 0.3rem; }
.faq details {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 16px; margin-bottom: 10px;
}
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin: 8px 0 4px; color: var(--muted); }

.site-footer { margin-top: 3rem; border-top: 1px solid var(--line); padding: 22px 0 34px; color: var(--muted); font-size: 0.9rem; }
.site-footer a { color: var(--muted); }
.disclaimer { font-size: 0.82rem; }

@media (max-width: 520px) {
  h1 { font-size: 1.55rem; }
  .calc { padding: 16px; }
  .cf-code { font-size: 1.45rem; }
}