* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  color: #15392d;
  background: linear-gradient(180deg, #f7fff9 0%, #eefbf4 48%, #f9fffb 100%);
}
.wrap {
  width: min(980px, calc(100vw - 2rem));
  margin: 1rem auto 2rem;
}
.card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(21, 128, 91, 0.15);
  border-radius: 18px;
  box-shadow: 0 14px 36px rgba(20, 81, 60, 0.12);
  padding: 1rem 1.2rem 1.6rem;
  line-height: 1.8;
}
.topbar {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.topbar a {
  text-decoration: none;
  color: #0f6b4d;
  background: #e8f8ef;
  border: 1px solid rgba(15, 107, 77, 0.2);
  border-radius: 999px;
  padding: 0.26rem 0.68rem;
  font-size: 0.9rem;
  font-weight: 700;
}
h1, h2, h3, h4, h5, h6 { color: #124836; line-height: 1.3; }
a { color: #0e7f5a; word-break: break-word; }
img { max-width: 100%; height: auto; }
hr { border: none; border-top: 1px solid #d9eee3; margin: 1rem 0; }
pre {
  background: #f2fbf6;
  border: 1px solid #d3ece0;
  border-radius: 10px;
  padding: 0.75rem;
  overflow: auto;
}
code {
  background: #eef9f3;
  border-radius: 4px;
  padding: 0.08rem 0.28rem;
}
blockquote {
  margin: 0.9rem 0;
  padding: 0.3rem 0.8rem;
  border-left: 4px solid #8ad8b6;
  background: #f3fcf7;
  border-radius: 8px;
}
.note {
  margin: 0.9rem 0;
  border: 1px solid #d6eadf;
  border-radius: 10px;
  background: #f4fbf7;
  padding: 0.7rem 0.8rem;
}
.note-title { font-weight: 800; margin-bottom: 0.45rem; }
ul, ol { padding-left: 1.4rem; }

/* Markdown table styles generated from md_to_custom_html.py */
.md-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.6rem 0 1rem;
  font-size: 0.95rem;
}
.md-table th,
.md-table td {
  padding: 0.5rem 0.7rem;
  border: 1px solid #d9eee3; /* subtle green border */
  vertical-align: middle;
}
.md-table thead th {
  background: linear-gradient(180deg, #f0fbf3 0%, #e6f7ec 100%); /* small fresh green */
  color: #0b5b3f;
  font-weight: 700;
  border-bottom: 1px solid #bfe6cf;
}
.md-table tbody tr:nth-child(odd) td {
  background: rgba(245, 252, 247, 0.6);
}
.md-table img { max-width: 100%; height: auto; display: block; }

/* keep tables responsive on small screens */
.md-table-wrap { overflow-x: auto; }