:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --ink: #1c2430;
  --muted: #5b6675;
  --line: #e3e8ef;
  --brand: #2f6df0;
  --brand-dark: #1f53c4;
  --accent: #00b894;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(18, 32, 56, .06), 0 6px 20px rgba(18, 32, 56, .06);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header.site {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
header.site .wrap { display: flex; align-items: center; gap: 10px; height: 56px; }
header.site .logo { font-weight: 800; font-size: 18px; color: var(--ink); letter-spacing: .02em; }
header.site .logo span { color: var(--brand); }
main { padding: 24px 0 48px; }
h1 { font-size: 26px; line-height: 1.35; margin: 8px 0 6px; }
h2 { font-size: 20px; margin: 32px 0 12px; }
.lead { color: var(--muted); margin: 0 0 20px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin: 0 0 18px;
}
label { display: block; font-weight: 600; font-size: 14px; margin: 14px 0 6px; }
label:first-child { margin-top: 0; }
input[type="number"], input[type="text"], select {
  width: 100%;
  padding: 13px 14px;
  font-size: 17px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  -webkit-appearance: none;
  appearance: none;
}
input:focus, select:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > div { flex: 1 1 140px; }
.seg { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.seg button {
  flex: 1 1 auto; padding: 11px 8px; font-size: 15px; font-weight: 600;
  border: 1px solid var(--line); background: #fff; color: var(--muted);
  border-radius: 10px; cursor: pointer;
}
.seg button.on { background: var(--brand); color: #fff; border-color: var(--brand); }
.result {
  margin-top: 18px; padding: 18px; border-radius: 12px;
  background: linear-gradient(135deg, #eef4ff, #e9fbf4);
  border: 1px solid #d8e6ff;
}
.result .big { font-size: 34px; font-weight: 800; color: var(--brand-dark); }
.result .big small { font-size: 16px; font-weight: 600; color: var(--muted); }
.result .note { font-size: 14px; color: var(--muted); margin-top: 6px; }
.breakdown { margin-top: 12px; font-size: 15px; }
.breakdown div { display: flex; justify-content: space-between; padding: 6px 0; border-top: 1px dashed var(--line); }
.toollist { list-style: none; padding: 0; margin: 0; }
.toollist li { margin: 0 0 12px; }
.toollist a {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); color: var(--ink);
}
.toollist a:hover { border-color: var(--brand); text-decoration: none; transform: translateY(-1px); transition: .15s; }
.toollist .t { font-weight: 700; font-size: 17px; }
.toollist .d { color: var(--muted); font-size: 14px; margin-top: 2px; }
.faq dt { font-weight: 700; margin-top: 16px; }
.faq dd { margin: 6px 0 0; color: var(--muted); }
.crumb { font-size: 13px; color: var(--muted); margin: 0 0 4px; }
footer.site { border-top: 1px solid var(--line); background: var(--card); padding: 24px 0; color: var(--muted); font-size: 13px; }
footer.site a { color: var(--muted); }
.muted { color: var(--muted); }
.hidden { display: none; }
.aff-banner {
  display: block; margin: 0 0 18px; padding: 16px 18px;
  background: linear-gradient(135deg, #fff7e6, #fff1d6);
  border: 1px solid #f3d99b; border-radius: var(--radius); color: var(--ink);
}
.aff-banner .at { font-weight: 700; font-size: 15px; }
.aff-banner .ad { color: var(--muted); font-size: 13px; margin-top: 2px; }
.aff-banner .ab { display: inline-block; margin-top: 10px; padding: 9px 16px; background: var(--brand); color: #fff; border-radius: 8px; font-weight: 700; font-size: 14px; }
.aff-banner:hover .ab { background: var(--brand-dark); }
.aff-note { font-size: 11px; color: var(--muted); margin: -10px 0 18px; }