/* 共通スタイル（モバイルファースト・軽量） */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", YuGothic, "Noto Sans JP", sans-serif;
  line-height: 1.75;
  color: #222;
  background: #f7f7f5;
  font-size: 16px;
}
a { color: #0b5cad; }
a:hover { text-decoration: none; }
.site-header {
  background: #14532d;
  color: #fff;
  padding: 0.9rem 1rem;
}
.site-header .site-name {
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}
.site-header p { margin: 0.2rem 0 0; font-size: 0.85rem; opacity: 0.9; }
.wrap { max-width: 760px; margin: 0 auto; padding: 1rem; }
main { background: #fff; padding: 1.2rem 1rem 1.6rem; border-radius: 8px; margin-top: 1rem; }
h1 { font-size: 1.45rem; line-height: 1.4; margin: 0.2rem 0 0.8rem; }
h2 { font-size: 1.15rem; border-left: 5px solid #14532d; padding-left: 0.55rem; margin: 1.8rem 0 0.6rem; }
h3 { font-size: 1.02rem; margin: 1.2rem 0 0.4rem; }
p { margin: 0.55rem 0; }
ul, ol { padding-left: 1.4rem; }
li { margin: 0.25rem 0; }
.breadcrumb { font-size: 0.82rem; color: #666; margin-bottom: 0.6rem; }
.breadcrumb a { color: #666; }
.tool-box {
  background: #f2f7f2;
  border: 1px solid #d5e4d5;
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
}
.tool-box label { display: block; font-weight: 700; margin: 0.7rem 0 0.25rem; }
.tool-box label:first-child { margin-top: 0; }
textarea, input, select, button {
  font: inherit;
}
textarea {
  width: 100%;
  min-height: 10rem;
  padding: 0.6rem;
  border: 1px solid #bbb;
  border-radius: 6px;
  background: #fff;
}
input[type="date"], input[type="number"], input[type="text"], select {
  width: 100%;
  padding: 0.55rem;
  border: 1px solid #bbb;
  border-radius: 6px;
  background: #fff;
}
button {
  background: #14532d;
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  margin-top: 0.8rem;
}
button:hover { background: #1b6a3b; }
.radio-row { display: flex; gap: 1rem; flex-wrap: wrap; margin: 0.4rem 0; }
.radio-row label { font-weight: 400; margin: 0; }
.result {
  background: #fff;
  border: 1px solid #cfe0cf;
  border-radius: 6px;
  padding: 0.8rem 1rem;
  margin-top: 1rem;
}
.result p { margin: 0.3rem 0; }
.result .big { font-size: 1.35rem; font-weight: 700; color: #14532d; }
.result-table { width: 100%; border-collapse: collapse; margin-top: 0.6rem; }
.result-table th, .result-table td {
  border: 1px solid #ddd;
  padding: 0.45rem 0.6rem;
  text-align: left;
  font-size: 0.95rem;
}
.result-table th { background: #f2f7f2; width: 45%; font-weight: 700; }
table.data-table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.92rem; }
table.data-table th, table.data-table td { border: 1px solid #ddd; padding: 0.35rem 0.5rem; }
table.data-table th { background: #f2f7f2; }
.note { background: #fdf6e3; border: 1px solid #eee0b5; border-radius: 6px; padding: 0.7rem 1rem; font-size: 0.92rem; }
.privacy-note { font-size: 0.85rem; color: #555; }
.example { background: #fafafa; border: 1px solid #e5e5e5; border-radius: 6px; padding: 0.6rem 1rem; margin: 0.6rem 0; }
.example p { margin: 0.25rem 0; }
.tool-list { list-style: none; padding: 0; }
.tool-list li { border: 1px solid #ddd; border-radius: 8px; padding: 0.8rem 1rem; margin: 0.6rem 0; background: #fff; }
.tool-list a { font-weight: 700; font-size: 1.05rem; }
.tool-list p { margin: 0.3rem 0 0; font-size: 0.92rem; color: #444; }
.site-footer {
  margin-top: 1.4rem;
  padding: 1.2rem 1rem 2rem;
  font-size: 0.85rem;
  color: #555;
}
.site-footer nav ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; }
.site-footer p { margin-top: 0.8rem; }
.error { color: #b00020; font-weight: 700; }
.mode-block { border-top: 1px dashed #cfe0cf; padding-top: 0.6rem; margin-top: 1rem; }
.mode-block:first-of-type { border-top: 0; margin-top: 0; padding-top: 0; }
@media (min-width: 640px) {
  main { padding: 1.6rem 1.8rem 2rem; }
  .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }
}