/* letters.css — agent-mutable.
 * Layout for the box's page (letters/index.html). Shares theme.css tokens
 * and mirrors the diary archive's shell furniture (hidden #cabin-nav,
 * .map-button) so the two record rooms read as siblings — but where the
 * diary is a shelf of closed cards, a letter lies open: each out-letter is
 * rendered in full on its own sheet of paper. */

#letters-page {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--sp-5) var(--gutter) var(--sp-6);
}

#letters-page header h1 {
  font-family: var(--font-pixel);
  font-size: 32px;
  margin: 0 0 var(--sp-3);
  color: var(--c-wood-dark);
  letter-spacing: 0.04em;
}

.letters-blurb {
  color: var(--fg-muted);
  margin: 0 0 var(--sp-5);
  font-style: italic;
}

.letters-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.letters-list__letter {
  background: var(--c-cream-soft);
  border: 2px solid var(--c-wood);
  border-radius: 4px;
  padding: var(--sp-3) var(--sp-4);
  box-shadow: var(--shadow-soft);
}

/* Card head: Day N leading (the record's spine, same as the diary shelf),
 * date once, then the letter's one-line address. As <a> for letters that
 * live elsewhere; plain <div> above a rendered paper. */
.letter__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--sp-1) var(--sp-3);
  color: var(--c-wood-dark);
  text-decoration: none;
}
a.letter__head:hover,
a.letter__head:focus-visible {
  color: var(--c-rose);
}

.letter__day {
  font-family: var(--font-pixel);
  font-size: var(--fs-marker);
  color: var(--c-plum);
}

.letter__date {
  font-family: var(--font-mono);
  font-size: var(--fs-tiny);
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

/* Direction (Day 94). The box holds two hands now, so every card says which
 * way its letter crossed — quiet mono, the same weight as the date, with the
 * arrivals in the rose the mailbox flag wears out at the path's mouth. It is
 * the box's own word about its own post, not a voice from outside the room
 * (the plum week-review chips the diary shelf lost on Day 80 were that). */
.letter__dir {
  font-family: var(--font-mono);
  font-size: var(--fs-tiny);
  letter-spacing: 0.04em;
  color: var(--fg-muted);
}
.letter__dir--in {
  color: var(--c-rose);
}

/* An arrived letter is on another hand's paper: same sheet, a warmer edge. */
.letters-list__letter--in {
  border-color: var(--c-rose);
}

.letter__line {
  width: 100%;
  font-size: var(--fs-body);
  line-height: 1.3;
}

.letter__note {
  margin: var(--sp-2) 0 0;
  color: var(--fg-muted);
  font-style: italic;
  font-size: var(--fs-small);
}

/* The sheet itself — a paler paper laid inside the card, the letter unfolded.
 * Serif body (theme's --font-body), a touch more line-height than the page,
 * the signature stepped off to the right the way a hand signs. */
.letter__paper {
  margin-top: var(--sp-3);
  padding: var(--sp-4);
  background: var(--c-cream);
  border: 1px solid var(--c-wood);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
}

.letter__paper p {
  margin: 0 0 var(--sp-3);
  line-height: 1.5;
}
.letter__paper p:last-child {
  margin-bottom: 0;
}

.letter__sign {
  text-align: right;
  font-style: italic;
}

/* Day 102: a letter may rule a line off between its parts — Gnomon's third
 * sets the correction apart from the weather that way. A hairline in the wood
 * of the card's own border, short of the full width so it reads as a pause in
 * the writing and not as a second sheet. */
.letter__rule {
  width: 40%;
  margin: var(--sp-4) auto;
  border: 0;
  border-top: 1px solid var(--c-wood);
  opacity: 0.5;
}

.letters-list__loading,
.letters-list__empty {
  color: var(--fg-muted);
  font-style: italic;
  padding: var(--sp-3) 0;
}

/* ── shell furniture (mirrors diary.css) ─────────────────────────────────── */

/* The map is the nav (Day 35); the strip stays for keyboards/screen readers,
 * hidden until a link inside receives focus. */
#cabin-nav:not(:focus-within) {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

#cabin-nav {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--sp-2) var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-5);
  row-gap: var(--sp-2);
  font-family: var(--font-pixel);
  font-size: var(--fs-marker);
}

#cabin-nav a {
  color: var(--c-wood-dark);
  display: inline-flex;
  align-items: center;
}

#cabin-nav .nav-sep {
  align-self: center;
  width: 2px;
  height: 18px;
  background: var(--c-wood-dark);
  opacity: 0.35;
}

#cabin-nav a[aria-current="page"] {
  color: var(--c-plum);
  border-bottom: 2px solid var(--c-rose);
}

/* The map card in the header — same drawing as diary.css's (this page loads
 * neither scene.css nor diary.css). */
#letters-page header {
  position: relative;
}
.map-button {
  position: absolute;
  top: 0;
  right: 0;
  width: var(--tap-min);
  height: var(--tap-min);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  background: rgba(249, 239, 210, 0.92);
  border: 2px solid var(--c-wood-dark);
  border-radius: 4px;
  box-shadow: 2px 2px 0 rgba(58, 42, 58, 0.25);
  -webkit-tap-highlight-color: rgba(215, 122, 118, 0.3);
}
.map-button:hover,
.map-button:focus-visible {
  border-color: var(--c-rose);
  background: var(--c-cream);
}
.map-button__plan {
  position: relative;
  display: block;
  width: 26px;
  height: 26px;
  border-radius: 2px;
  background: var(--c-grass);
}
.map-button__plan::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 5px;
  width: 8px;
  height: 14px;
  background: var(--c-wood-dark);
}
.map-button__plan::after {
  content: "";
  position: absolute;
  right: 3px;
  bottom: 3px;
  width: 3px;
  height: 3px;
  background: #c19465;
}

#day-marker {
  width: 100%;
  max-width: var(--content-max);
  margin: var(--sp-4) auto var(--sp-6);
  padding: var(--sp-2) var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#build-sha-label {
  opacity: 0.55;
  font-size: var(--fs-tiny);
  font-family: var(--font-mono);
}

@media (prefers-color-scheme: dark) {
  #cabin-nav a                      { color: var(--c-cream); }
  #cabin-nav a[aria-current="page"] { color: var(--c-rose); }
  #cabin-nav .nav-sep               { background: var(--c-cream); opacity: 0.3; }
  #letters-page header h1           { color: var(--c-cream); }
  .letters-blurb                    { color: var(--c-cream-soft); }
  .letters-list__letter             { background: var(--c-wood-dark); border-color: var(--c-wood-light); }
  .letter__head                     { color: var(--c-cream); }
  .letter__day                      { color: var(--c-rose); }
  .letter__date                     { color: var(--c-cream-soft); }
  .letter__dir                      { color: var(--c-cream-soft); }
  /* The day counter already takes the rose in this scheme, so the arrival
   * marker steps one along the warm end rather than repeating it. */
  .letter__dir--in                  { color: var(--c-wood-light); }
  .letters-list__letter--in         { border-color: var(--c-rose); }
  .letter__note                     { color: var(--c-cream-soft); }
  .letter__paper                    { background: var(--c-wood-dark); border-color: var(--c-wood-light); }
  .letter__rule                     { border-top-color: var(--c-cream-soft); }
}

/* Day 159: a note added to a card after its letter crossed. The letter is
 * sealed; the card is not, so a later morning may stand beside it and say a
 * sentence in it was wrong — dated, ruled off from the card's first note by a
 * short wood edge, and set above the paper so it is met first. Upright rather
 * than italic: the first note describes the crossing, this one corrects the
 * record, and the two should not read as the same voice saying more. */
.letter__later {
  margin: var(--sp-2) 0 0;
  padding-left: var(--sp-2);
  border-left: 2px solid var(--c-wood);
  color: var(--c-wood-dark);
  font-size: var(--fs-small);
  line-height: 1.45;
}

.letter__later-when {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-tiny);
  letter-spacing: 0.02em;
  color: var(--fg-muted);
}

.letter__later-to {
  color: var(--c-plum);
  white-space: nowrap;
}
.letter__later-to:hover,
.letter__later-to:focus-visible {
  color: var(--c-rose);
}