:root {
  --paper: #f3ead8;
  --paper-deep: #e7dcc6;
  --ink: #1c1710;
  --mute: #5c5346;
  --forest: #2d4a34;
  --moss: #3f6a48;
  --rust: #b4532a;
  --line: #c9b89a;
  --serif: "Newsreader", "Times New Roman", serif;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #d8cbb0;
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.7;
}
a { color: var(--rust); }
a:hover { color: var(--forest); }

.ridge {
  position: sticky;
  top: 0;
  z-index: 3;
  height: 72px;
  background: #d8cbb0;
}
.ridge svg { display: block; width: 100%; height: 72px; fill: var(--forest); }

.sheet {
  display: grid;
  grid-template-columns: 230px 1fr;
  max-width: 1280px;
  margin: -28px auto 0;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(28, 23, 16, 0.12);
}

.toc {
  position: sticky;
  top: 72px;
  align-self: start;
  min-height: calc(100vh - 72px);
  padding: 1.6rem 1.2rem 2rem;
  border-right: 1px solid var(--line);
  background: var(--paper-deep);
}
.brand {
  display: block;
  text-decoration: none;
  color: var(--ink);
  margin-bottom: 1.4rem;
}
.brand strong {
  display: block;
  font-family: var(--sans);
  letter-spacing: 0.18em;
  font-size: 1.05rem;
}
.brand span { color: var(--mute); font-size: 0.86rem; }
.toc-label {
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--forest);
  margin: 0 0 0.6rem;
}
.toc nav { display: flex; flex-direction: column; gap: 0.45rem; }
.toc nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 1.02rem;
  border-left: 2px solid transparent;
  padding-left: 0.55rem;
}
.toc nav a.is-here { border-left-color: var(--rust); color: var(--rust); }
.lang {
  display: flex;
  margin: 1.4rem 0 0.8rem;
  border: 1px solid var(--line);
}
.lang-btn {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 0.4rem 0.2rem;
  font: 600 0.78rem var(--sans);
  color: var(--mute);
  cursor: pointer;
}
.lang-btn.is-on { background: var(--forest); color: #f3ead8; }
.toc-mail { font-size: 0.82rem; }
.burger {
  display: none;
  border: 1px solid var(--line);
  background: var(--paper);
  width: 2.4rem;
  height: 2.4rem;
}

.paper { padding: 2.4rem 4.5vw 3rem; }
.kicker {
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--forest);
  margin: 0 0 0.6rem;
}
.mast-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 3px double var(--ink);
  padding-bottom: 0.6rem;
  margin-bottom: 1.2rem;
}
.issue { margin: 0; font-family: var(--sans); font-size: 0.8rem; color: var(--mute); }
.mast h1, .chronicle h2, .ridges h2, .soft h2, .trade h2, .fleet h2, .info h2, .yard h2, .rules h2, .faq h2, .desk h2 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 3.4vw, 3.1rem);
}
.deck, .lead { font-size: 1.18rem; color: var(--mute); max-width: 54rem; }
.mast-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.3rem 0 0;
  margin: 1.6rem 0 0;
  border-top: 1px solid var(--line);
}
.mast-facts span {
  display: block;
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
}
.mast-facts b { font-weight: 600; }

section { padding: 2.8rem 0; border-top: 1px solid var(--line); }
.columns {
  columns: 2;
  column-gap: 2.2rem;
}
.columns p { margin: 0 0 1rem; }
.columns p:first-child::first-letter {
  font-size: 3.1rem;
  font-weight: 700;
  float: left;
  line-height: 0.8;
  padding: 0.15rem 0.45rem 0 0;
  color: var(--rust);
}
.stamp {
  margin: 1.4rem 0 0;
  padding: 0.7rem 1rem;
  border: 2px dashed var(--rust);
  color: var(--rust);
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ridge-cards, .ledger, .yard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.ledger { grid-template-columns: 1fr 1fr; }
.ridge-cards article, .ledger article, .split article, .yard-grid article, .soft-note, .notice {
  background: #fff8ea;
  border: 1px solid var(--line);
  padding: 1.2rem 1.15rem;
}
.ridge-cards em {
  font-family: var(--sans);
  color: var(--rust);
  font-size: 1.3rem;
}
.ridge-cards h3, .ledger h3, .split h3, .yard-grid h3, .soft-note h3 {
  font-size: 1.25rem;
  margin: 0.3rem 0 0.6rem;
}
.ledger span {
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--forest);
  letter-spacing: 0.08em;
}
.soft-note { margin-top: 1rem; }
.soft-note ol { margin: 0; padding-left: 1.1rem; }
.soft-note li + li { margin-top: 0.4rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.split ul { padding-left: 1.1rem; }
.split li + li { margin-top: 0.35rem; }

.gazette {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.4rem;
  font-size: 0.98rem;
  background: #fff8ea;
}
.gazette caption {
  caption-side: top;
  text-align: left;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--forest);
  padding-bottom: 0.5rem;
}
.gazette th, .gazette td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.7rem;
  text-align: left;
}
.gazette th { background: var(--forest); color: #f3ead8; font-family: var(--sans); font-weight: 600; }

.route { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.8rem; }
.route li {
  display: grid;
  grid-template-columns: 14rem 1fr;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
}
.route b { font-size: 1.15rem; }
.route p { margin: 0; color: var(--mute); }
.notice { margin-top: 1rem; color: var(--mute); }

.rule-list { margin: 0; padding-left: 1.2rem; font-size: 1.08rem; }
.rule-list li + li { margin-top: 0.55rem; }

.faq-list details { border-bottom: 1px solid var(--line); padding: 0.85rem 0; }
.faq-list summary { cursor: pointer; font-size: 1.2rem; font-weight: 600; }
.faq-list p { margin: 0.6rem 0 0; color: var(--mute); }

.desk {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.desk address { font-style: normal; margin: 1rem 0; }
#deskForm {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  background: #fff8ea;
  border: 1px solid var(--line);
  padding: 1.1rem;
}
#deskForm label { display: flex; flex-direction: column; gap: 0.3rem; font-family: var(--sans); font-size: 0.78rem; color: var(--mute); }
#deskForm .full, #deskForm button, .form-ok { grid-column: 1 / -1; }
#deskForm input, #deskForm select, #deskForm textarea {
  border: 1px solid var(--line);
  background: #fbf6ea;
  padding: 0.65rem 0.7rem;
  font: 400 1rem var(--serif);
  color: var(--ink);
}
#deskForm button {
  border: 0;
  background: var(--rust);
  color: #fff8ea;
  padding: 0.85rem 1rem;
  font: 600 0.95rem var(--sans);
  cursor: pointer;
}
#deskForm button:hover { background: #8f3d1c; }
.form-ok { margin: 0; color: var(--forest); }

.colophon {
  border-top: 3px double var(--ink);
  padding-top: 1.2rem;
  font-family: var(--sans);
  font-size: 0.86rem;
  color: var(--mute);
}

@media (max-width: 980px) {
  .ridge { position: relative; }
  .sheet { grid-template-columns: 1fr; margin-top: 0; }
  .toc {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(80vw, 280px);
    transform: translateX(-105%);
    transition: transform 0.25s ease;
    z-index: 8;
    box-shadow: 8px 0 24px rgba(0,0,0,.12);
  }
  .toc.is-open { transform: none; }
  .burger { display: inline-flex; align-items: center; justify-content: center; }
  .columns { columns: 1; }
  .mast-facts, .ridge-cards, .ledger, .split, .yard-grid, .desk, #deskForm { grid-template-columns: 1fr; }
  .route li { grid-template-columns: 1fr; gap: 0.3rem; }
}

@media (max-width: 560px) {
  .paper { padding: 1.4rem 5vw 2rem; }
  .gazette { display: block; overflow-x: auto; }
}