/* =========================================================
   The Bureau of Unsent Letters — shared stylesheet
   ========================================================= */

:root {
  --paper:        #f4ead5;
  --paper-soft:   #efe3c6;
  --paper-dark:   #e3d3ad;
  --ink:          #2a1f14;
  --ink-soft:     #5c4a33;
  --ink-faint:    #8a7554;
  --accent:       #8b2e1f;
  --accent-soft:  #b04a36;
  --rule:         #b89968;
  --shadow:       rgba(42, 31, 20, 0.08);

  --serif:        "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans:         -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono:         "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --maxw:         72rem;
  --gutter:       clamp(1.25rem, 4vw, 3rem);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--serif);
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 18% 12%, rgba(139, 46, 31, 0.05), transparent 40%),
    radial-gradient(circle at 82% 88%, rgba(42, 31, 20, 0.05), transparent 45%),
    repeating-linear-gradient(
      0deg,
      rgba(42, 31, 20, 0.015) 0,
      rgba(42, 31, 20, 0.015) 1px,
      transparent 1px,
      transparent 3px
    );
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(139, 46, 31, 0.35);
  transition: color .2s ease, border-color .2s ease;
}
a:hover, a:focus-visible {
  color: var(--accent-soft);
  border-bottom-color: var(--accent-soft);
  outline: none;
}

/* ---------- Masthead ---------- */
.masthead {
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(180deg, var(--paper-soft) 0%, var(--paper) 100%);
  padding: 1.25rem var(--gutter) 0.75rem;
}

.masthead-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  border-bottom: none;
  color: var(--ink);
}
.brand:hover { border-bottom: none; color: var(--ink); }

.brand-seal {
  flex: 0 0 auto;
  filter: drop-shadow(0 1px 0 rgba(42,31,20,0.15));
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.brand-sub {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 0.2rem;
}

.nav {
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
}
.nav-link {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding: 0.2rem 0;
}
.nav-link:hover { color: var(--ink); border-bottom-color: var(--rule); }
.nav-link.is-current {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

.postmark {
  max-width: var(--maxw);
  margin: 0.75rem auto 0;
  color: var(--accent);
  opacity: 0.75;
  display: flex;
  justify-content: flex-end;
}
.postmark svg { display: block; }

/* ---------- Layout ---------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem var(--gutter);
  flex: 1 0 auto;
  width: 100%;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 1rem;
}

/* ---------- Home / Hero ---------- */
.hero {
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 3rem;
}
.hero-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.005em;
  margin: 0 0 1.5rem;
  color: var(--ink);
}
.lede {
  font-size: 1.15rem;
  max-width: 44rem;
  color: var(--ink-soft);
  margin: 0;
}
.hero-rule {
  margin-top: 2.5rem;
  height: 1px;
  background: linear-gradient(90deg, var(--accent) 0%, transparent 60%);
  width: 8rem;
}

/* ---------- Grid / Cards ---------- */
.grid {
  display: grid;
  gap: 1.75rem;
  margin-bottom: 3rem;
}
.grid-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 52rem) {
  .grid-three { grid-template-columns: 1fr; }
}

.card {
  background: var(--paper-soft);
  border: 1px solid var(--rule);
  padding: 1.75rem 1.5rem;
  position: relative;
  box-shadow: 0 1px 0 rgba(255,255,255,0.6) inset, 0 6px 20px -12px var(--shadow);
}
.card::before {
  content: "";
  position: absolute;
  top: 0.5rem; left: 0.5rem; right: 0.5rem; bottom: 0.5rem;
  border: 1px dashed rgba(184, 153, 104, 0.5);
  pointer-events: none;
}
.card-title {
  font-family: var(--serif);
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.card-body {
  margin: 0 0 1.25rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}
.card-link {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ---------- Notice ---------- */
.notice {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 2rem 0;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  align-items: baseline;
}
@media (max-width: 42rem) {
  .notice { grid-template-columns: 1fr; gap: 0.75rem; }
}
.notice-title {
  font-family: var(--serif);
  font-size: 1.35rem;
  margin: 0;
  color: var(--ink);
}
.notice p { margin: 0 0 0.75rem; color: var(--ink-soft); }
.notice-note {
  font-style: italic;
  color: var(--ink-faint) !important;
  margin-bottom: 0 !important;
}

/* ---------- Page head ---------- */
.page-head {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}
.page-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.005em;
}
.page-lede {
  max-width: 44rem;
  color: var(--ink-soft);
  margin: 0;
  font-size: 1.05rem;
}

/* ---------- Catalogue ---------- */
.letter-list {
  list-style: none;
  padding: 0;
  margin: 0 0 3rem;
  border-top: 1px solid var(--rule);
}
.letter-row {
  display: grid;
  grid-template-columns: 5.5rem 11rem 14rem 14rem 1fr;
  gap: 1.25rem;
  padding: 1.1rem 0.25rem;
  border-bottom: 1px solid rgba(184, 153, 104, 0.5);
  align-items: baseline;
  font-size: 0.95rem;
}
.letter-row:hover { background: rgba(239, 227, 198, 0.6); }
.letter-no {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.letter-date {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}
.letter-weather, .letter-distance {
  color: var(--ink-soft);
  font-style: italic;
}
.letter-note { color: var(--ink); }
@media (max-width: 58rem) {
  .letter-row {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
  .letter-no { color: var(--accent); font-weight: 600; }
}

.marginalia {
  max-width: 34rem;
  margin-left: auto;
  padding: 1.5rem 1.75rem;
  border-left: 3px solid var(--accent);
  background: var(--paper-soft);
  color: var(--ink-soft);
}
.marginalia h2 {
  font-family: var(--serif);
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  color: var(--ink);
}
.marginalia p { margin: 0; font-size: 0.95rem; }

/* ---------- Letter specimen ---------- */
.letter-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem 1.5rem;
  margin: 1.5rem 0 0;
  font-size: 0.9rem;
}
@media (max-width: 42rem) {
  .letter-meta { grid-template-columns: 1fr 1fr; }
}
.letter-meta div {
  border-top: 1px solid var(--rule);
  padding-top: 0.6rem;
}
.letter-meta dt {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.25rem;
}
.letter-meta dd {
  margin: 0;
  color: var(--ink);
}

.letter-body {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
@media (max-width: 56rem) {
  .letter-body { grid-template-columns: 1fr; }
}

.letter-paper {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.3), transparent 30%),
    var(--paper-soft);
  border: 1px solid var(--rule);
  padding: 2.25rem 2rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--ink);
  box-shadow: 0 10px 30px -18px rgba(42,31,20,0.4);
  position: relative;
}
.letter-paper::before {
  content: "";
  position: absolute;
  inset: 0.5rem;
  border: 1px solid rgba(184, 153, 104, 0.45);
  pointer-events: none;
}
.letter-paper p { margin: 0 0 1rem; }
.letter-salutation { font-weight: 500; font-style: normal; }
.letter-closing { margin-top: 1.5rem; }
.letter-signature { margin: 0; font-style: normal; }

.letter-facsimile {
  margin: 0;
  align-self: start;
}
.letter-facsimile svg {
  display: block;
  background: var(--paper-soft);
  border: 1px solid var(--rule);
  box-shadow: 0 6px 20px -12px var(--shadow);
}
.letter-facsimile figcaption {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-top: 0.75rem;
  text-transform: uppercase;
}

.letter-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- About / Prose ---------- */
.prose {
  max-width: 42rem;
  margin-bottom: 3rem;
}
.prose h2 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
  margin: 2.5rem 0 0.75rem;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.prose h2:first-child { margin-top: 0; }
.prose p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}
.prose p:first-of-type::first-line {
  font-variant: small-caps;
  letter-spacing: 0.05em;
}

.keepers {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  border-top: 1px solid var(--rule);
}
.keepers li {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0.25rem;
  border-bottom: 1px solid rgba(184, 153, 104, 0.5);
  font-size: 0.95rem;
}
.keeper-name { color: var(--ink); }
.keeper-term {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}

/* ---------- 404 ---------- */
.lost {
  text-align: center;
  padding: 2rem 0 3rem;
  color: var(--ink-soft);
}
.lost-seal {
  display: block;
  margin: 0 auto 2rem;
  color: var(--accent);
  opacity: 0.85;
}
.lost-title {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 500;
  margin: 0 0 1rem;
  color: var(--ink);
}
.lost-lede {
  max-width: 34rem;
  margin: 0 auto 1.5rem;
  font-size: 1.05rem;
}
.lost-note { max-width: 30rem; margin: 0 auto 2rem; }
.lost-code {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------- Colophon / Footer ---------- */
.colophon {
  border-top: 1px solid var(--rule);
  background: var(--paper-soft);
  padding: 1.5rem var(--gutter);
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-align: center;
}
.colophon p { margin: 0.15rem 0; }

/* ---------- Selection & focus ---------- */
::selection {
  background: var(--accent);
  color: var(--paper);
}
:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 3px;
}