:root {
  --bg: #f5f8f7; --card: #ffffff; --ink: #1a2b27; --sub: #5f7470;
  --accent: #0f8a64; --accent-soft: #e3f4ee; --line: #e2e9e7;
  --warn-soft: #fdf3e3; --warn: #9a6a14;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Segoe UI", "Malgun Gothic", Pretendard, sans-serif;
  line-height: 1.65;
}
.wrap { max-width: 860px; margin: 0 auto; padding: 0 20px 70px; }
header.site {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0; margin-bottom: 8px; flex-wrap: wrap; gap: 8px;
}
header.site .logo { font-size: 20px; font-weight: 800; color: var(--accent); text-decoration: none; }
header.site .logo small { color: var(--sub); font-weight: 400; font-size: 12px; margin-left: 6px; }
header.site nav { display: flex; gap: 14px; font-size: 14px; flex-wrap: wrap; }
header.site nav a { color: var(--sub); text-decoration: none; font-weight: 600; }
header.site nav a:hover { color: var(--accent); }
.hero { text-align: center; padding: 36px 0 28px; }
.hero h1 { font-size: 30px; margin: 0 0 8px; }
.hero p { color: var(--sub); margin: 0; font-size: 16px; }
.sec-title { font-size: 15px; color: var(--sub); letter-spacing: .5px; margin: 34px 0 12px; font-weight: 700; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 20px; text-decoration: none; color: inherit; display: block;
}
a.card:hover { border-color: var(--accent); }
.card h3 { margin: 0 0 4px; font-size: 16px; }
.card p { margin: 0; color: var(--sub); font-size: 13.5px; }
.badge {
  display: inline-block; font-size: 11.5px; font-weight: 700; border-radius: 99px;
  padding: 2px 10px; margin-bottom: 8px;
}
.badge.live { background: var(--accent-soft); color: var(--accent); }
.badge.soon { background: #edf1f0; color: var(--sub); }
.badge.ext { background: var(--warn-soft); color: var(--warn); }
.list-item {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 18px; margin-bottom: 10px; display: block; text-decoration: none; color: inherit;
}
.list-item:hover { border-color: var(--accent); }
.list-item .t { font-weight: 700; font-size: 15.5px; }
.list-item .d { color: var(--sub); font-size: 13.5px; margin-top: 2px; }
article.prose { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 28px 30px; }
article.prose h1 { font-size: 26px; margin: 0 0 6px; line-height: 1.35; }
article.prose h2 { font-size: 19px; margin: 28px 0 10px; padding-top: 6px; }
article.prose h3 { font-size: 16px; margin: 20px 0 8px; }
article.prose p, article.prose li { font-size: 15.5px; }
article.prose a { color: var(--accent); }
article.prose code, article.prose pre {
  background: #f0f4f3; border-radius: 6px; font-size: 14px;
  font-family: Consolas, monospace;
}
article.prose pre { padding: 14px 16px; overflow-x: auto; line-height: 1.5; }
article.prose code { padding: 1px 6px; }
article.prose pre code { padding: 0; }
article.prose blockquote {
  margin: 14px 0; padding: 10px 16px; border-left: 4px solid var(--accent);
  background: var(--accent-soft); border-radius: 0 8px 8px 0; color: #14533f;
}
article.prose table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 12px 0; }
article.prose th, article.prose td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
article.prose th { background: #f0f4f3; font-size: 13px; color: var(--sub); }
.meta-line { color: var(--sub); font-size: 13px; margin: 0 0 18px; }
.tool-box { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px 26px; margin-bottom: 20px; }
.tool-box label { font-size: 13.5px; color: var(--sub); font-weight: 700; display: block; margin-bottom: 4px; }
.tool-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.tool-row > div { flex: 1; min-width: 140px; }
select, input[type="text"] {
  width: 100%; font-size: 16px; padding: 10px 12px; border: 2px solid var(--line);
  border-radius: 10px; background: #fff; color: var(--ink); outline: none;
}
select:focus, input:focus { border-color: var(--accent); }
.result {
  margin-top: 16px; padding: 14px 18px; background: var(--accent-soft);
  border-radius: 10px; font-size: 17px; font-weight: 700; color: #14533f;
}
footer.site {
  margin-top: 50px; padding-top: 18px; border-top: 1px solid var(--line);
  color: var(--sub); font-size: 12.5px; line-height: 1.8;
}
footer.site a { color: var(--sub); }
.note { background: var(--warn-soft); color: var(--warn); border-radius: 10px; padding: 10px 16px; font-size: 13.5px; }