:root {
  --brick: #7a3a31;
  --brick-deep: #54241f;
  --mortar-line: #cbb7a4;
  --plaster: #e4ddd1;
  --paper: #fbf7ee;
  --ink: #231814;
  --brass: #9a7324;
  --moss: #3d5744;
  --pin: #c4a14a;
  --err: #8a2a22;
  --font-display: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Source Han Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--plaster);
  line-height: 1.55;
}
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

.mortar { min-height: 100vh; display: flex; flex-direction: column; }

.brickband {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  padding: 1.25rem 6vw 1.1rem;
  color: #f3e6d4;
  background-color: var(--brick);
  background-image:
    linear-gradient(var(--mortar-line) 2px, transparent 2px),
    linear-gradient(90deg, var(--mortar-line) 2px, transparent 2px);
  background-size: 92px 28px;
  background-position: 0 0, 0 0;
  box-shadow: inset 0 -10px 0 var(--brick-deep);
}
.nameplate {
  text-decoration: none;
  background: #1c120e;
  color: #e8d7b0;
  padding: 0.55rem 0.9rem 0.45rem;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 0.7rem;
  border: 1px solid #c4a14a;
  box-shadow: 2px 3px 0 #3a1c16;
}
.nameplate-en {
  grid-row: 1 / span 2;
  writing-mode: vertical-rl;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--pin);
  align-self: center;
}
.nameplate-zh {
  font-family: var(--font-display);
  font-size: 1.55rem;
  line-height: 1.1;
}
.nameplate-sub { font-size: 0.82rem; opacity: 0.85; }

.nav { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.nav a, .nav button {
  color: #f6ead8;
  background: none;
  border: 0;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  padding: 0;
}
.nav .enter {
  background: var(--pin);
  color: #1c120e;
  padding: 0.35rem 0.8rem;
}
.inline { display: inline; margin: 0; }

.yard {
  width: min(46rem, calc(100% - 8vw));
  margin: 1.75rem auto 3rem;
  flex: 1;
}
.colophon {
  padding: 1rem 6vw 1.5rem;
  color: #6b5c50;
  font-size: 0.85rem;
}

.lede h1, .gate h1, .paper-page h1, .letter h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.2;
  margin: 0 0 0.6rem;
}
.lede p, .gate > p, .paper-page > p { margin: 0 0 1.1rem; max-width: 38em; }
.lede-actions { margin-top: 1.2rem; }

.cats {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin: 1.5rem 0 1.2rem;
}
.cats a {
  text-decoration: none;
  padding: 0.2rem 0.7rem 0.15rem;
  background: transparent;
  border-bottom: 2px solid transparent;
}
.cats a[aria-current="page"] { border-bottom-color: var(--brick); }

.rail { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.slip {
  background: var(--paper);
  position: relative;
  box-shadow: 3px 4px 0 rgba(36, 25, 20, 0.12);
}
.slip.done { opacity: 0.62; }
.slip a {
  display: grid;
  gap: 0.35rem;
  text-decoration: none;
  padding: 1.15rem 1.15rem 1rem 1.4rem;
}
.pin {
  position: absolute;
  top: -0.35rem;
  left: 1.1rem;
  width: 0.7rem;
  height: 0.7rem;
  background: radial-gradient(circle at 35% 35%, #ecd27a, var(--brass) 55%, #6a4c16);
  border-radius: 50%;
  box-shadow: 0 1px 0 #3a2a10;
}
.kind { color: var(--brick); font-size: 0.86rem; }
.excerpt { color: #4e433b; }
.meta { color: #6b5c50; font-size: 0.86rem; display: flex; gap: 0.7rem; flex-wrap: wrap; }
.empty-rail {
  background: var(--paper);
  padding: 1.5rem 1.3rem;
  box-shadow: 3px 4px 0 rgba(36, 25, 20, 0.12);
}

.btn {
  display: inline-block;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  padding: 0.45rem 0.95rem;
}
.btn.primary { background: var(--moss); color: #f4efe4; border-color: #2a3c30; }
.btn.wide { width: 100%; text-align: center; }

.flash {
  width: min(46rem, calc(100% - 8vw));
  margin: 1rem auto 0;
  background: #efe4c8;
  padding: 0.6rem 0.9rem;
}
.flash-err { background: #f0d4cc; color: var(--err); }

.gate, .paper-page, .letter, .helpers, .talk {
  background: var(--paper);
  padding: 1.4rem 1.3rem 1.5rem;
  box-shadow: 3px 4px 0 rgba(36, 25, 20, 0.12);
  margin-bottom: 1.1rem;
}
.guest-form { margin: 1.2rem 0 1.4rem; }
.or-rail {
  text-align: center;
  color: #6b5c50;
  margin: 0.4rem 0 1rem;
}
.hint { color: #6b5c50; font-size: 0.92rem; }
.devcode {
  background: #1c120e;
  color: #e8d7b0;
  padding: 0.6rem 0.8rem;
  font-family: ui-monospace, monospace;
}
.stack { display: grid; gap: 0.3rem; margin: 0.75rem 0; }
.stack span, fieldset legend { color: #4e433b; }
input, textarea {
  font: inherit;
  padding: 0.45rem 0.55rem;
  border: 1px solid #b7aa9a;
  background: #fffcf6;
  width: 100%;
}
.channel {
  border: 0;
  padding: 0;
  margin: 0.4rem 0 0.8rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.channel label { display: flex; gap: 0.35rem; align-items: center; }
.channel input { width: auto; }
.stack-form { margin-top: 0.8rem; }

.letter .body { white-space: normal; margin: 1rem 0 1.1rem; max-width: 38em; }
.helpers h2, .talk h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 0.7rem;
}
.helper-list, .replies { list-style: none; padding: 0; margin: 0 0 1rem; display: grid; gap: 0.9rem; }
.helper-list li, .replies li { border-top: 1px solid #ddd2c3; padding-top: 0.8rem; }
.envelope { margin: 0.4rem 0 0; }
.envelope div { display: grid; grid-template-columns: 4rem 1fr; gap: 0.4rem; }
.envelope dt { color: #6b5c50; }
.volunteer-form {
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px dashed #c9bcae;
}
.contact-fill {
  background: #f3ece0;
  padding: 0.8rem;
  margin: 0.7rem 0;
}

@media (max-width: 640px) {
  .brickband { flex-direction: column; align-items: flex-start; }
  .yard { width: calc(100% - 1.5rem); }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}