:root {
  --ink: #0c0f0e;
  --paper: #f2eee6;
  --white: #fffcf7;
  --mute: #5f6863;
  --line: rgba(12,15,14,0.14);
  --signal: #e85d04;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.85;
}
a { color: inherit; }
.top {
  background: var(--ink);
  color: var(--white);
  padding: 1rem 0;
}
.top a { text-decoration: none; font-weight: 800; letter-spacing: 0.06em; font-size: 0.85rem; }
.wrap { width: min(100% - 2rem, 820px); margin: 0 auto; }
main { padding: 2.2rem 0 3rem; }
h1 { font-size: 1.55rem; line-height: 1.4; margin: 0 0 0.3rem; }
.updated { color: var(--mute); font-size: 0.84rem; margin: 0 0 1.6rem; }
h2 {
  font-size: 1.08rem;
  margin: 2rem 0 0.6rem;
  padding-left: 0.6rem;
  border-left: 4px solid var(--signal);
}
p { margin: 0.5rem 0; }
ul, ol { margin: 0.4rem 0 0.8rem; padding-left: 1.3rem; }
li { margin: 0.2rem 0; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border: 1px solid var(--line);
  margin: 0.6rem 0 1rem;
  font-size: 0.93rem;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--line);
}
th { width: 30%; background: #ebe5d9; font-weight: 700; }
tr:last-child th, tr:last-child td { border-bottom: 0; }
.box {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  padding: 1rem 1.1rem;
  margin: 0.8rem 0;
}
.small { font-size: 0.85rem; color: var(--mute); }
footer {
  background: #070908;
  color: rgba(255,255,255,0.6);
  padding: 1.6rem 0 2rem;
  font-size: 0.82rem;
}
footer a { color: rgba(255,255,255,0.85); margin-right: 1rem; }
@media (max-width: 640px) {
  th, td { display: block; width: 100%; }
  th { border-bottom: 0; padding-bottom: 0.2rem; }
  td { padding-top: 0.3rem; }
}