:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #142033;
  --muted: #5a6779;
  --line: #dde2ea;
  --accent: #127a43;
  --accent-ink: #ffffff;
  --brand: #0f1a2b;
  --warn-bg: #fff7e0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1320;
    --card: #121d2f;
    --ink: #e8edf5;
    --muted: #9aa7ba;
    --line: #26344b;
    --accent: #7cf29c;
    --accent-ink: #0b1320;
    --brand: #0f1a2b;
    --warn-bg: #2a2614;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
header.site {
  background: var(--brand);
  color: #fff;
  padding: 14px 16px;
}
header.site .wrap { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
header.site a { color: #fff; text-decoration: none; }
header.site .logo { font-weight: 800; letter-spacing: 0.5px; font-size: 20px; }
header.site .logo span { color: #7cf29c; }
header.site nav a { margin-left: 14px; opacity: 0.85; font-size: 15px; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
main { padding: 28px 0 48px; }
h1 { font-size: clamp(26px, 5vw, 36px); line-height: 1.2; margin: 0 0 10px; }
h2 { font-size: 22px; margin: 32px 0 10px; }
.lede { color: var(--muted); font-size: 18px; margin-top: 0; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin: 18px 0;
}
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.grid a.card { display: block; margin: 0; text-decoration: none; color: inherit; }
.grid a.card:hover { border-color: var(--accent); }
.grid a.card strong { color: var(--accent); }
label { display: block; font-weight: 600; margin: 14px 0 6px; }
.hint { color: var(--muted); font-size: 14px; font-weight: 400; }
input[type="number"], select {
  width: 100%;
  max-width: 320px;
  padding: 10px 12px;
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.radio { display: flex; gap: 18px; flex-wrap: wrap; }
.radio label { font-weight: 400; margin: 0; display: flex; gap: 6px; align-items: center; }
button, .btn {
  display: inline-block;
  padding: 10px 16px;
  font: inherit;
  font-weight: 700;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
  text-decoration: none;
}
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.result {
  margin-top: 18px;
  padding: 16px;
  border-radius: 10px;
  border: 2px solid var(--accent);
  font-size: 18px;
}
.result .big { font-size: 28px; font-weight: 800; }
.note { background: var(--warn-bg); border-radius: 10px; padding: 12px 14px; font-size: 15px; }
.cta { border-left: 4px solid var(--accent); }
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; min-width: 560px; font-size: 15px; }
th, td { border-bottom: 1px solid var(--line); padding: 6px 6px; text-align: right; }
th:first-child, td:first-child { text-align: left; }
td input[type="number"] { max-width: 110px; padding: 6px 8px; }
tr.total td { font-weight: 800; border-top: 2px solid var(--ink); }
footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 20px 0 40px; }
footer.site a { color: var(--muted); }