:root {
  --ink: #2b2724;
  --ink-soft: #5c554f;
  --paper: #faf6f0;
  --card: #ffffff;
  --terra: #c05f3c;
  --terra-deep: #9a4527;
  --oat: #ede4d7;
  --line: #e0d5c6;
  --ok: #3d7a52;
  --warn: #a8632a;
  --code-bg: #f3ece2;
  --radius: 10px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', sans-serif;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem 6rem; }

nav.top {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  font-size: 0.85rem;
  overflow-x: auto;
  white-space: nowrap;
}
nav.top .inner { max-width: 46rem; margin: 0 auto; padding: 0.6rem 1.25rem; display: flex; gap: 1.1rem; }
nav.top a { color: var(--ink-soft); text-decoration: none; font-weight: 500; }
nav.top a:hover { color: var(--terra-deep); }
nav.top a.here { color: var(--terra-deep); font-weight: 700; border-bottom: 2px solid var(--terra); }

header.hero {
  border-bottom: 3px solid var(--terra);
  background: linear-gradient(180deg, #fdfaf5 0%, var(--paper) 100%);
  padding: 3rem 0 2.2rem;
  margin-bottom: 2.5rem;
}
.kicker {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--terra-deep);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
h1 {
  font-family: 'Shippori Mincho', serif;
  font-size: clamp(1.55rem, 4.5vw, 2.2rem);
  line-height: 1.4;
  font-weight: 700;
  margin-bottom: 1rem;
}
.hero p.lead { color: var(--ink-soft); max-width: 40rem; }
.accent { color: var(--terra); }

h2 {
  font-family: 'Shippori Mincho', serif;
  font-size: 1.42rem;
  line-height: 1.5;
  margin: 3.4rem 0 1rem;
  padding-top: 1rem;
}
h2 .num {
  color: var(--terra);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.92rem;
  display: block;
  letter-spacing: 0.08em;
  margin-bottom: 0.2rem;
}
h3 { font-size: 1.02rem; font-weight: 700; margin: 1.5rem 0 0.5rem; }

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
  margin: 1.5rem 0 0;
}
.meta-cell {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
}
.meta-cell .k { font-size: 0.72rem; color: var(--ink-soft); letter-spacing: 0.05em; }
.meta-cell .v { font-weight: 700; font-size: 1.02rem; }
.meta-cell .v small { font-weight: 500; font-size: 0.78rem; color: var(--ink-soft); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.6rem 1.7rem;
  margin: 1.4rem 0;
}
.card.task { border-left: 4px solid var(--terra); }

a.domain-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--terra);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  margin: 0.8rem 0;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
a.domain-card:hover { transform: translateY(-1px); box-shadow: 0 3px 12px rgba(60,40,20,0.08); }
a.domain-card .d-num { font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem; color: var(--terra-deep); letter-spacing: 0.1em; }
a.domain-card .d-title { font-weight: 700; font-size: 1.05rem; }
a.domain-card .d-desc { font-size: 0.88rem; color: var(--ink-soft); }
a.domain-card .d-weight { float: right; font-weight: 700; color: var(--terra); font-size: 1.1rem; }

.oneliner {
  background: var(--oat);
  border-radius: 8px;
  padding: 0.85rem 1.1rem;
  margin: 0.8rem 0 1.2rem;
  font-weight: 500;
}
.oneliner::before { content: "一言でいうと："; font-size: 0.78rem; display: block; color: var(--terra-deep); font-weight: 700; letter-spacing: 0.05em; }

ul { padding-left: 1.3rem; margin: 0.4rem 0 1rem; }
li { margin: 0.45rem 0; }
li::marker { color: var(--terra); }
ol { padding-left: 1.4rem; margin: 0.4rem 0 1rem; }

.label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.6rem;
  border-radius: 99px;
  margin-bottom: 0.4rem;
}
.label.exam { background: #f7e8df; color: var(--terra-deep); }
.label.org { background: #e3ecdf; color: var(--ok); }
.label.trap { background: #f5e9d8; color: var(--warn); }

.org-map {
  border: 1px dashed var(--ok);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
  background: #fbfdfa;
}
.trap-box {
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 1.2rem 0 0.2rem;
  background: #fdf7ec;
  border: 1px solid #ecd9b8;
}
.trap-box li::marker { content: "✕ "; color: var(--warn); }

code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82em;
  background: var(--code-bg);
  border-radius: 4px;
  padding: 0.1em 0.4em;
  word-break: break-all;
}
.yomi { font-size: 0.82rem; color: var(--ink-soft); font-weight: 400; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; margin: 1rem 0; }
th, td { text-align: left; padding: 0.6rem 0.7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.76rem; letter-spacing: 0.05em; color: var(--ink-soft); font-weight: 700; }
.table-scroll { overflow-x: auto; }

details.dict { border-bottom: 1px solid var(--line); padding: 0.7rem 0.2rem; }
details.dict summary { cursor: pointer; font-weight: 700; list-style: none; }
details.dict summary::before { content: "▸ "; color: var(--terra); }
details.dict[open] summary::before { content: "▾ "; }
details.dict p { margin: 0.5rem 0 0.3rem 1.1rem; color: var(--ink-soft); font-size: 0.94rem; }

.check-list { list-style: none; padding: 0; }
.check-list li { display: flex; gap: 0.6rem; align-items: flex-start; margin: 0.65rem 0; }
.check-list input { margin-top: 0.42rem; accent-color: var(--terra); width: 1rem; height: 1rem; flex-shrink: 0; }
.check-list label { cursor: pointer; }

.toc { font-size: 0.94rem; }
.toc a, .card a { color: var(--terra-deep); text-decoration: none; border-bottom: 1px solid var(--line); }
.toc a:hover, .card a:hover { border-bottom-color: var(--terra); }
.toc li { margin: 0.3rem 0; }

.principle {
  border-left: 3px solid var(--terra);
  padding: 0.2rem 0 0.2rem 1rem;
  margin: 1.1rem 0;
}
.principle .p-title { font-weight: 700; }
.principle .p-body { font-size: 0.93rem; color: var(--ink-soft); }

.pager { display: flex; justify-content: space-between; margin-top: 3rem; font-size: 0.92rem; }
.pager a { color: var(--terra-deep); text-decoration: none; font-weight: 700; }

footer {
  margin-top: 4rem; padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem; color: var(--ink-soft);
}
@media (max-width: 560px) {
  body { font-size: 15.5px; }
  .card { padding: 1.2rem 1.1rem; }
}

pre {
  background: #2b2724;
  color: #f0e9df;
  border-radius: 8px;
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  line-height: 1.7;
  margin: 1rem 0;
}
pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
pre .cm { color: #a89a8a; }
pre .hl { color: #e8a07e; }
.step-num {
  display: inline-block;
  background: var(--terra);
  color: #fff;
  width: 1.6rem; height: 1.6rem;
  border-radius: 50%;
  text-align: center;
  line-height: 1.6rem;
  font-size: 0.85rem;
  font-weight: 700;
  margin-right: 0.5rem;
}