:root {
  --bg: #f3f1eb;
  --paper: #fffcf7;
  --ink: #161513;
  --muted: #5b5852;
  --faint: #8a867e;
  --line: #ddd8cf;
  --field: #ffffff;
  --accent: #243d63;
  --rule: #b8923f;
  --seal: #a63d32;
  --footer: #141311;
  --max: 40rem;
  --wide: 72rem;
  --sans: "Source Sans 3", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --zh: "LXGW WenKai", "霞鹜文楷", "Noto Serif SC", "Songti SC", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.7;
  min-height: 100vh;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; height: auto; }

a { color: inherit; }

.wrap { width: min(var(--max), calc(100% - 3rem)); margin: 0 auto; }
.wrap-wide { width: min(var(--wide), calc(100% - 3rem)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(243, 241, 235, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(221, 216, 207, 0.9);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.05rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  min-width: 0;
}

.brand-name {
  font-family: var(--sans);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.seal {
  position: relative;
  width: 0.72rem;
  aspect-ratio: 100 / 168;
  flex: none;
  color: var(--seal);
  display: block;
  opacity: 0.78;
}

.seal svg { width: 100%; height: auto; display: block; }

.seal-ink {
  position: absolute;
  left: 16%;
  right: 16%;
  top: 7.5%;
  bottom: 7.5%;
  background: currentColor;
  -webkit-mask: url("/seal-mark.png") center / contain no-repeat;
  mask: url("/seal-mark.png") center / contain no-repeat;
}

.nav {
  display: flex;
  gap: 1.55rem;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 500;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
}

.nav a:hover { color: var(--ink); }

.kicker {
  font-family: var(--mono);
  color: var(--faint);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}

.kicker.light { color: rgba(255, 252, 247, 0.72); }

h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(2.8rem, 5.8vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0 0 1rem;
}

.title-rule {
  width: 3.4rem;
  height: 0.28rem;
  background: var(--rule);
  border: 0;
  margin: 0 0 1.35rem;
}

.lede {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 1rem;
  max-width: 34rem;
  font-weight: 600;
}

.hero-support {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
  margin: 0;
  max-width: 32rem;
}

/* Masthead */
.masthead {
  position: relative;
  isolation: isolate;
  padding: 4.5rem 0 4rem;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.masthead-media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.masthead-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% center;
  filter: saturate(0.88) contrast(1.02);
}

.masthead-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(243, 241, 235, 0.97) 0%, rgba(243, 241, 235, 0.9) 34%, rgba(243, 241, 235, 0.35) 58%, rgba(243, 241, 235, 0.08) 78%, transparent 100%),
    linear-gradient(180deg, rgba(243, 241, 235, 0.2) 0%, transparent 40%, rgba(243, 241, 235, 0.45) 100%);
}

.masthead-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.8fr);
  gap: 2.8rem;
  align-items: end;
}

.reveal {
  animation: rise 0.9s ease both;
}

.masthead-grid .sub-card { animation-delay: 0.12s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.sub-card {
  background: var(--paper);
  border: 1px solid rgba(221, 216, 207, 0.95);
  padding: 1.65rem 1.5rem 1.45rem;
  box-shadow: 0 22px 50px rgba(20, 19, 17, 0.1);
}

.sub-card .kicker { margin-bottom: 0.55rem; }

.sub-card h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.5rem;
}

.sub-card .card-copy {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
  margin: 0 0 1.15rem;
}

.sub { display: grid; gap: 0.7rem; margin: 0; }

.sub-wrap { margin: 0; }

/* Author display rules beat the UA [hidden] style — force replace, don't stack. */
.sub-wrap.is-subscribed [data-subscribe-form],
.sub[hidden],
.sub-success[hidden] {
  display: none !important;
}

.sub-row { display: flex; gap: 0.5rem; flex-wrap: wrap; }

input[type="email"] {
  flex: 1 1 12rem;
  min-width: 0;
  background: var(--field);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.85rem 0.95rem;
  font-family: var(--sans);
  font-size: 1rem;
}

input[type="email"]:focus {
  outline: 2px solid rgba(36, 61, 99, 0.22);
  outline-offset: 1px;
  border-color: var(--accent);
}

button, .btn {
  background: var(--ink);
  color: #fff;
  border: 0;
  border-radius: 2px;
  padding: 0.85rem 1.15rem;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button:hover, .btn:hover { background: var(--accent); }

.btn-light {
  background: var(--paper);
  color: var(--ink);
}

.btn-light:hover { background: #fff; color: var(--ink); }

.age {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.9rem;
  min-height: 2.4rem;
}

.fine {
  color: var(--faint);
  font-family: var(--sans);
  font-size: 0.84rem;
  line-height: 1.5;
  margin: 0.1rem 0 0;
}

.hp { position: absolute; left: -9999px; }

.form-note {
  min-height: 0;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.9rem;
  margin: 0;
}

.form-note:empty { display: none; }

.form-note.is-error { color: #8a2f2f; }

.sub-success {
  display: grid;
  gap: 0.55rem;
  animation: rise 0.45s ease both;
}

.sub-success[hidden] { display: none; }

.sub-success:focus { outline: none; }

.sub-success .kicker { margin-bottom: 0.15rem; }

.sub-success h2 {
  font-family: var(--serif);
  font-size: clamp(1.85rem, 3.2vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 0.15rem;
  color: var(--ink);
}

.sub-success .card-copy {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.5;
  margin: 0 0 0.35rem;
}

.sub-success-actions { margin: 0.55rem 0 0.15rem; }

.sub-success .fine { margin-top: 0.25rem; }

.sub-success .text-link {
  display: inline;
  margin-left: 0.35rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: inherit;
  font-weight: 600;
  letter-spacing: 0;
  text-decoration: underline;
  cursor: pointer;
}

.sub-success .text-link:hover {
  color: var(--ink);
  background: none;
}

/* Trust */
.trust {
  background: #ebe7df;
  border-bottom: 1px solid var(--line);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  padding: 2.4rem 0;
}

.trust-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.55rem;
}

.trust-body {
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.45;
  color: var(--ink);
  margin: 0;
  max-width: 18rem;
}

/* Feature */
.feature {
  padding: 4rem 0;
  border-bottom: 1px solid var(--line);
}

.feature-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 3rem;
  align-items: center;
}

.feature-media {
  margin: 0;
  overflow: hidden;
  background: #ddd8cf;
  aspect-ratio: 5 / 4;
}

.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s ease;
}

.feature-media:hover img { transform: scale(1.03); }

.feature-num {
  font-family: var(--serif);
  font-size: clamp(4rem, 8vw, 6rem);
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: rgba(22, 21, 19, 0.08);
  margin: 0 0 0.35rem;
  font-weight: 700;
}

.feature-copy h2 {
  font-size: clamp(1.9rem, 3.2vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin: 0 0 0.55rem;
  font-weight: 700;
}

.feature-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--faint);
  letter-spacing: 0.04em;
  margin: 0 0 1.1rem;
}

.excerpt p {
  color: var(--muted);
  margin: 0 0 1rem;
  max-width: 34rem;
}

.more {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(36, 61, 99, 0.35);
}

.more:hover { border-bottom-color: var(--accent); }

.section { padding: 3.4rem 0; border-bottom: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.6rem;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  letter-spacing: -0.025em;
  margin: 0.2rem 0 0;
  font-weight: 700;
}

.night-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.night-list li { border-bottom: 1px solid var(--line); }

.night-list a {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.35rem 1rem;
  padding: 1.25rem 1rem 1.25rem 0;
  text-decoration: none;
  min-height: 4.2rem;
  align-items: start;
  transition: background 0.2s ease;
}

.night-list a:hover { background: rgba(255, 252, 247, 0.55); }
.night-list a:hover .nt { color: var(--accent); }

.no {
  font-family: var(--mono);
  color: var(--faint);
  font-size: 0.8rem;
  font-weight: 500;
  padding-top: 0.25rem;
}

.nt {
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.3;
}

.ntag {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 0.88rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 1.2rem;
}

.filters button {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 0.45rem 0.85rem;
  min-height: 2.5rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.filters button[aria-pressed="true"] {
  color: #fff;
  background: var(--ink);
  border-color: var(--ink);
}

/* Letter band */
.letter-band {
  position: relative;
  isolation: isolate;
  padding: 5rem 0;
  color: #fffcf7;
  overflow: hidden;
}

.letter-band-media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.letter-band-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.25) brightness(0.42);
}

.letter-band-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(20, 19, 17, 0.88), rgba(20, 19, 17, 0.55));
}

.letter-band-inner h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
  font-weight: 700;
}

.letter-band-inner > p {
  font-family: var(--sans);
  color: rgba(255, 252, 247, 0.78);
  font-size: 1.05rem;
  max-width: 28rem;
  margin: 0 0 1.4rem;
  line-height: 1.5;
}

/* Article */
.piece { padding: 3rem 0 1.5rem; }

.zh-title {
  font-family: var(--zh);
  font-weight: 500;
  color: var(--faint);
  font-size: 1rem;
  margin: -0.2rem 0 1rem;
  letter-spacing: 0.06em;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  margin: 0 0 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.meta-row .fine { margin: 0; }

.meta-row a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.meta-row a:hover { border-bottom-color: currentColor; }

.quote {
  margin: 0 0 2.5rem;
  padding: 0 0 0 1.25rem;
  border-left: 3px solid var(--rule);
}

.quote .original {
  font-family: var(--zh);
  font-size: clamp(1.15rem, 2.4vw, 1.35rem);
  line-height: 1.85;
  margin: 0 0 0.95rem;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.quote .translation {
  color: var(--muted);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0 0 0.8rem;
}

.quote .source {
  font-family: var(--sans);
  color: var(--faint);
  font-size: 0.84rem;
  line-height: 1.45;
  margin: 0;
}

.piece p { margin: 0 0 1.15rem; }

.piece h2 {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 2.5rem 0 0.85rem;
}

.pillow {
  font-size: clamp(1.35rem, 2.5vw, 1.7rem);
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin: 0.1rem 0 1.3rem;
  max-width: 30rem;
  font-weight: 600;
}

.close-image {
  font-style: italic;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.6;
}

.words {
  width: 100%;
  border-collapse: collapse;
  margin: 0.2rem 0 0.4rem;
}

.words td {
  padding: 0.7rem 0.8rem 0.7rem 0;
  vertical-align: baseline;
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 0.92rem;
  color: var(--muted);
}

.words .ch {
  font-family: var(--zh);
  font-size: 1.15rem;
  width: 2rem;
  color: var(--ink);
  font-weight: 500;
}

.words .py {
  color: var(--faint);
  width: 4.2rem;
}

.crumbs {
  margin: 0 0 1.1rem;
}

.crumbs a { text-decoration: underline; text-underline-offset: 0.15em; }

.related-nights {
  margin: 2.4rem 0 0;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.related-nights h2 {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.75rem;
}

.related-nights ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.related-nights a {
  font-family: var(--serif);
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.letter-prompt {
  margin: 2.8rem 0 0;
  padding: 1.5rem 1.4rem;
  background: var(--paper);
  border: 1px solid var(--line);
}

.share {
  margin: 2.6rem 0 0;
  padding: 1.3rem 0 0;
  border-top: 1px solid var(--line);
}

.share-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.75rem;
}

.share-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.share-btn {
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.55rem 0.85rem;
  text-decoration: none;
  cursor: pointer;
  min-height: 2.4rem;
  display: inline-flex;
  align-items: center;
}

.share-btn:hover {
  border-color: var(--ink);
  background: var(--paper);
}

.share-note { min-height: 1.2rem; margin-top: 0.55rem; }

.footer-link {
  color: rgba(255, 252, 247, 0.88);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.legal h2 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  text-transform: none;
  color: var(--ink);
  margin: 2rem 0 0.7rem;
}

.about a { color: var(--accent); }

.letter-prompt h2 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--ink);
  margin: 0 0 0.45rem;
}

.letter-prompt p {
  font-family: var(--sans);
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 1rem;
}

.page-hero { padding: 3rem 0 1.5rem; }

.about { padding: 3rem 0 1.5rem; }
.about p { margin: 0 0 1.1rem; max-width: 38rem; }

/* Footer */
.site-footer {
  background: var(--footer);
  color: rgba(255, 252, 247, 0.62);
  padding: 3rem 0 3.4rem;
  font-family: var(--sans);
  font-size: 0.88rem;
  line-height: 1.55;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2rem;
}

.footer-mark {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.7rem;
  color: #fffcf7;
  font-weight: 700;
}

.footer-mark .seal {
  width: 0.68rem;
  opacity: 0.85;
  color: #c45a4c;
}

.footer-tag {
  color: rgba(255, 252, 247, 0.72);
  margin: 0;
  max-width: 16rem;
}

.footer-col p { margin: 0 0 0.7rem; }

@media (max-width: 980px) {
  .masthead-grid,
  .feature-grid,
  .trust-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .masthead-media img { object-position: 80% center; }

  .masthead-media::after {
    background:
      linear-gradient(180deg, rgba(243, 241, 235, 0.82) 0%, rgba(243, 241, 235, 0.92) 58%, rgba(243, 241, 235, 0.97) 100%);
  }

  .night-list { grid-template-columns: 1fr; }

  .feature-media { aspect-ratio: 16 / 10; }
}

@media (max-width: 720px) {
  body { font-size: 1.05rem; }
  .wrap,
  .wrap-wide { width: min(100% - 1.5rem, var(--wide)); }
  .site-header-inner {
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
  }
  .nav {
    width: 100%;
    gap: 1.05rem;
    font-size: 0.9rem;
  }
  .masthead { padding: 2.4rem 0 2.2rem; }
  h1 { font-size: clamp(2.35rem, 11vw, 3.1rem); }
  .sub-row { flex-direction: column; }
  .sub-row input,
  .sub-row button { width: 100%; }
  .trust-grid { gap: 1.4rem; padding: 1.8rem 0; }
  .feature,
  .section { padding: 2.4rem 0; }
  .letter-band { padding: 3.4rem 0; }
  .piece { padding: 2rem 0 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; }
  .feature-media img { transition: none; }
}