/* The Crossing Notes — logbook, not a ticket desk.
   Prefix brn-. Paper, hull-red, a left spine. No webfonts. */

:root {
  --brn-ink: #1c1914;
  --brn-body: #3a342c;
  --brn-quiet: #6d6458;
  --brn-rule: #c9bba6;
  --brn-paper: #f4efe6;
  --brn-sheet: #fbf7f0;
  --brn-hull: #7c2f28;
  --brn-hull-deep: #541f1b;
  --brn-sea: #2f4a46;
  --brn-spine: 4.25rem;
  --brn-measure: 68ch;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--brn-body);
  background:
    linear-gradient(90deg, var(--brn-hull) 0 var(--brn-spine), var(--brn-paper) var(--brn-spine));
  font-family: "Iowan Old Style", Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-size: 1.125rem;
  line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brn-hull-deep); }
a:hover { color: var(--brn-ink); }

.brn-spine {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--brn-spine);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.brn-spine span {
  color: #f4efe6;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  letter-spacing: .28em;
  font-family: "Segoe UI", Candara, sans-serif;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.brn-sheet {
  margin-left: var(--brn-spine);
  min-height: 100vh;
  background: var(--brn-sheet);
}

.brn-top {
  padding: 1.4rem 1.6rem 0;
  border-bottom: 3px double var(--brn-ink);
}
.brn-mark {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  font-family: "Segoe UI", Candara, sans-serif;
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--brn-quiet);
}
.brn-mark a { color: inherit; text-decoration: none; }
.brn-mark strong {
  color: var(--brn-ink);
  font-weight: 750;
  letter-spacing: .14em;
}
.brn-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1.1rem;
  margin: .85rem 0 0;
  padding: 0 0 .7rem;
  list-style: none;
}
.brn-nav a {
  font-family: "Segoe UI", Candara, sans-serif;
  font-size: .92rem;
  color: var(--brn-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.brn-nav a[aria-current="page"] { border-bottom-color: var(--brn-hull); color: var(--brn-hull-deep); }

.brn-main { padding: 1.6rem 1.6rem 3rem; max-width: calc(var(--brn-measure) + 8rem); }
.brn-kicker {
  font-family: "Segoe UI", Candara, sans-serif;
  font-size: .75rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--brn-hull);
  margin: 0 0 .4rem;
}
h1 {
  font-weight: 560;
  font-size: clamp(2rem, 4vw, 3.15rem);
  line-height: 1.12;
  color: var(--brn-ink);
  margin: 0 0 .6rem;
  letter-spacing: -.02em;
}
.brn-lede { font-size: 1.2rem; max-width: var(--brn-measure); margin: 0 0 1.2rem; }
h2 {
  font-size: 1.45rem;
  font-weight: 600;
  color: var(--brn-ink);
  margin: 2rem 0 .4rem;
}
p { max-width: var(--brn-measure); }
ul, ol { max-width: var(--brn-measure); padding-left: 1.2rem; }

.brn-figure { margin: 1.2rem 0 1.6rem; max-width: 46rem; }
.brn-figure img { width: 100%; border: 1px solid var(--brn-rule); }
.brn-figure figcaption {
  font-family: "Segoe UI", Candara, sans-serif;
  font-size: .82rem;
  color: var(--brn-quiet);
  margin-top: .4rem;
}

.brn-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  max-width: 50rem;
  margin: 1rem 0 1.4rem;
}
.brn-pair article {
  background: var(--brn-paper);
  border-top: 4px solid var(--brn-sea);
  padding: .9rem 1rem 1rem;
}
.brn-pair h2 { margin-top: 0; font-size: 1.25rem; }
.brn-pair p { margin: .3rem 0 0; }

.brn-plates {
  display: grid;
  gap: .8rem;
  max-width: 48rem;
  margin: 1rem 0;
}
.brn-plate {
  border: 1px solid var(--brn-ink);
  background: #fffdf8;
  padding: .85rem 1rem .95rem 3.1rem;
  position: relative;
}
.brn-plate::before {
  content: "";
  position: absolute;
  left: .9rem;
  top: 1.05rem;
  width: .95rem;
  height: .95rem;
  background: var(--brn-hull);
  transform: rotate(45deg);
}
.brn-plate h2, .brn-plate h3 { margin: 0 0 .25rem; font-size: 1.12rem; }
.brn-plate p { margin: 0; }

.brn-note {
  border-left: 3px solid var(--brn-hull);
  padding: .2rem 0 .2rem .9rem;
  color: var(--brn-ink);
  max-width: var(--brn-measure);
}

details {
  max-width: var(--brn-measure);
  border-bottom: 1px solid var(--brn-rule);
  padding: .55rem 0;
}
summary { cursor: pointer; color: var(--brn-ink); font-weight: 600; }
details p { margin: .4rem 0 .2rem; }

.brn-foot {
  margin-left: var(--brn-spine);
  padding: 1.2rem 1.6rem 2rem;
  border-top: 1px solid var(--brn-rule);
  background: var(--brn-paper);
  font-family: "Segoe UI", Candara, sans-serif;
  font-size: .86rem;
  color: var(--brn-quiet);
}
.brn-foot nav { display: flex; flex-wrap: wrap; gap: .4rem 1rem; margin-bottom: .6rem; }
.brn-foot a { color: var(--brn-ink); }
.brn-credit { max-width: 70ch; }

@media (max-width: 720px) {
  :root { --brn-spine: 0px; }
  body { background: var(--brn-paper); }
  .brn-spine { display: none; }
  .brn-sheet, .brn-foot { margin-left: 0; }
  .brn-pair { grid-template-columns: 1fr; }
  .brn-top, .brn-main, .brn-foot { padding-left: 1rem; padding-right: 1rem; }
}