/* Variation B — Letterpress Folio 折本 ===============================
   Aesthetic: large display serif, manuscript page with margins, prominent
   vermillion seal, ornamental flower marks, generous whitespace.
   ==================================================================== */

:root {
  --lf-paper:   #f5ecd9;
  --lf-paper-2: #ede2c5;
  --lf-paper-3: #e6d8b6;
  --lf-ink:     #1a1814;
  --lf-ink-2:   #4a463d;
  --lf-ink-3:   #6e6859;
  --lf-rule:    #c8b896;
  --lf-vermillion: #8b1a1a;
  --lf-vermillion-soft: rgba(139, 26, 26, 0.13);
  --lf-ochre:   #9c7a3a;
  --lf-sage:    #5a6b5a;

  --lf-serif:   "Source Han Serif SC", "Noto Serif SC", "STSong", "Songti SC", serif;
  --lf-display: "EB Garamond", "Cormorant Garamond", "Hoefler Text", Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.lf-root {
  background: var(--lf-paper);
  color: var(--lf-ink);
  font-family: var(--lf-serif);
  min-height: 100%;
  padding: 56px 96px 72px 120px;
  position: relative;
  overflow: hidden;
  line-height: 1.5;
  background-image:
    radial-gradient(rgba(60, 50, 30, 0.022) 1px, transparent 1px),
    radial-gradient(rgba(60, 50, 30, 0.018) 1px, transparent 1px);
  background-size: 19px 19px, 33px 33px;
  background-position: 0 0, 11px 7px;
}

/* Side rule (manuscript margin) */
.lf-page-rule {
  position: absolute;
  left: 56px;
  top: 56px;
  bottom: 56px;
  width: 1px;
  background: var(--lf-vermillion);
  opacity: 0.45;
}
.lf-folio-no {
  position: absolute;
  left: 32px;
  top: 60px;
  font-family: var(--lf-serif);
  font-size: 24px;
  color: var(--lf-vermillion);
  writing-mode: vertical-rl;
  letter-spacing: 0.1em;
  opacity: 0.85;
}

.lf-inner { position: relative; z-index: 1; }

/* ===== Hero ====================================================== */
.lf-hero { margin-bottom: 56px; }
.lf-hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 40px;
  padding-bottom: 24px;
}

.lf-kicker {
  font-family: var(--lf-display);
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--lf-ink-3);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.lf-kicker-orn { color: var(--lf-vermillion); font-size: 10px; }

.lf-display {
  font-family: var(--lf-serif);
  font-weight: 700;
  font-size: 168px;
  line-height: 0.92;
  letter-spacing: 0.1em;
  color: var(--lf-ink);
  display: flex;
  gap: 4px;
  margin-bottom: 18px;
}
.lf-display-1 { color: var(--lf-ink); }
.lf-display-2 { color: var(--lf-vermillion); }
.lf-display-3 { color: var(--lf-ink); }

.lf-tagline {
  font-family: var(--lf-display);
  font-size: 16px;
  line-height: 1.55;
  color: var(--lf-ink-2);
  font-style: normal;
  max-width: 460px;
}
.lf-tagline em {
  color: var(--lf-vermillion);
  font-weight: 500;
}

.lf-hero-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.lf-seal {
  width: 124px;
  height: 124px;
  opacity: 0.92;
  filter: drop-shadow(0 0.5px 0 rgba(139, 26, 26, 0.2));
}
.lf-hero-meta {
  text-align: center;
  font-family: var(--lf-serif);
  font-size: 16px;
  color: var(--lf-ink-2);
  letter-spacing: 0.18em;
}
.lf-hero-meta-en {
  font-family: var(--lf-display);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--lf-ink-3);
  margin-top: 4px;
  text-transform: uppercase;
  font-style: italic;
}

.lf-rule-fancy {
  display: flex;
  align-items: center;
  gap: 12px;
}
.lf-rule-line {
  flex: 1;
  height: 1px;
  background: var(--lf-ink);
}
.lf-rule-orn {
  color: var(--lf-vermillion);
  font-size: 14px;
}

/* ===== Ribbon stats ================================================ */
.lf-ribbon {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--lf-rule);
  border-top: 1px solid var(--lf-rule);
  border-bottom: 1px solid var(--lf-rule);
  margin-bottom: 64px;
}
.lf-ribbon-stat {
  background: var(--lf-paper);
  padding: 22px 24px;
  text-align: left;
}
.lf-ribbon-value {
  font-family: var(--lf-display);
  font-size: 40px;
  font-weight: 500;
  color: var(--lf-ink);
  letter-spacing: 0.01em;
  font-variant-numeric: oldstyle-nums;
  line-height: 1;
  margin-bottom: 6px;
}
.lf-ribbon-label {
  font-family: var(--lf-display);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lf-ink-3);
  text-transform: lowercase;
}

/* ===== Section heads =============================================== */
.lf-compose-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 32px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--lf-ink);
}
.lf-results-meta {
  margin-left: auto;
  text-align: right;
  font-family: var(--lf-display);
  font-size: 13px;
  color: var(--lf-ink-2);
}
.lf-compose-eyebrow {
  font-family: var(--lf-display);
  font-style: italic;
  font-size: 22px;
  color: var(--lf-vermillion);
}
.lf-h2 {
  font-family: var(--lf-display);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--lf-ink);
  white-space: nowrap;
}
.lf-compose-zh {
  font-family: var(--lf-serif);
  font-size: 16px;
  letter-spacing: 0.18em;
  color: var(--lf-ink-3);
}
.lf-results-meta b {
  color: var(--lf-ink);
  font-weight: 600;
  font-variant-numeric: oldstyle-nums;
}
.lf-muted { color: var(--lf-ink-3); font-style: italic; }

/* ===== Compose: tabs =============================================== */
.lf-compose { margin-bottom: 56px; }
.lf-tabs {
  display: flex;
  gap: 36px;
  margin-bottom: 32px;
}
.lf-tab {
  background: transparent;
  border: none;
  font-family: var(--lf-serif);
  font-size: 17px;
  color: var(--lf-ink-3);
  cursor: pointer;
  padding: 4px 0 6px;
  border-bottom: 2px solid transparent;
  letter-spacing: 0.1em;
  transition: color 0.15s, border-color 0.15s;
}
.lf-tab:hover { color: var(--lf-ink); }
.lf-tab.is-on {
  color: var(--lf-vermillion);
  border-bottom-color: var(--lf-vermillion);
}

/* ===== Manuscript grid ============================================= */
.lf-manuscript {
  background:
    repeating-linear-gradient(
      to right,
      transparent 0 11.11%,
      rgba(139, 26, 26, 0.04) 11.11% 11.11%
    ),
    var(--lf-paper-2);
  border: 1px solid var(--lf-rule);
  padding: 36px 40px 28px;
  margin-bottom: 48px;
  position: relative;
}
.lf-manuscript::before, .lf-manuscript::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  border: 1px solid var(--lf-vermillion);
  opacity: 0.7;
}
.lf-manuscript::before { top: 8px; left: 8px; }
.lf-manuscript::after { bottom: 8px; right: 8px; }

.lf-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 22px;
}
.lf-cell {
  position: relative;
  width: 64px;
  height: 64px;
  border: 1px solid var(--lf-vermillion);
  background: var(--lf-paper);
  cursor: pointer;
  font-family: var(--lf-serif);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, box-shadow 0.15s;
  /* 米字格 — full mizige guides */
  background-image:
    /* horizontal */
    linear-gradient(to bottom, transparent calc(50% - 0.5px), rgba(139, 26, 26, 0.35) calc(50% - 0.5px), rgba(139, 26, 26, 0.35) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    /* vertical */
    linear-gradient(to right, transparent calc(50% - 0.5px), rgba(139, 26, 26, 0.35) calc(50% - 0.5px), rgba(139, 26, 26, 0.35) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    /* diag \ */
    linear-gradient(135deg, transparent calc(50% - 0.4px), rgba(139, 26, 26, 0.22) calc(50% - 0.4px), rgba(139, 26, 26, 0.22) calc(50% + 0.4px), transparent calc(50% + 0.4px)),
    /* diag / */
    linear-gradient(45deg, transparent calc(50% - 0.4px), rgba(139, 26, 26, 0.22) calc(50% - 0.4px), rgba(139, 26, 26, 0.22) calc(50% + 0.4px), transparent calc(50% + 0.4px));
}
.lf-cell:hover { box-shadow: inset 0 0 0 2px rgba(139, 26, 26, 0.25); }
.lf-cell.is-focus {
  box-shadow: inset 0 0 0 2px var(--lf-vermillion);
  background-color: var(--lf-paper);
}
.lf-cell.is-filled {
  background-image: none;
  background-color: var(--lf-paper);
  border-color: var(--lf-ink);
}
.lf-cell-char {
  font-size: 36px;
  font-weight: 600;
  line-height: 1;
  color: var(--lf-ink);
}
.lf-grid-break {
  width: 100%;
  display: flex;
  justify-content: center;
  font-family: var(--lf-serif);
  font-size: 24px;
  color: var(--lf-vermillion);
  padding: 6px 0;
  letter-spacing: 0.5em;
}
.lf-grid-break span { opacity: 0.6; }

.lf-manuscript-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--lf-display);
  font-size: 13px;
}
.lf-quiet {
  background: none;
  border: none;
  color: var(--lf-ink-2);
  cursor: pointer;
  font-family: var(--lf-display);
  font-size: 13px;
  letter-spacing: 0.06em;
  padding: 0;
  font-style: italic;
  transition: color 0.15s;
}
.lf-quiet:hover { color: var(--lf-vermillion); }
.lf-quiet-sep { color: var(--lf-rule); }

/* ===== Filters ===================================================== */
.lf-filters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.lf-filter {
  border-top: 2px solid;
  padding: 18px 0 16px;
}
.lf-filter-ochre { border-top-color: var(--lf-ochre); }
.lf-filter-sage  { border-top-color: var(--lf-sage); }
.lf-filter-label {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}
.lf-filter-zh {
  font-family: var(--lf-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--lf-ink);
  letter-spacing: 0.12em;
}
.lf-filter-en {
  font-family: var(--lf-display);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lf-ink-3);
  font-style: italic;
}
.lf-filter-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--lf-rule);
  padding: 6px 0 8px;
  font-family: var(--lf-serif);
  font-size: 16px;
  color: var(--lf-ink);
  outline: none;
  transition: border-color 0.15s;
}
.lf-filter-input:focus { border-bottom-color: var(--lf-ink); }
.lf-filter-input::placeholder {
  color: var(--lf-ink-3);
  font-family: var(--lf-display);
  font-style: italic;
  font-size: 13.5px;
}
.lf-filter-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.lf-filter-chip {
  font-family: var(--lf-serif);
  font-size: 16px;
  padding: 3px 10px 5px;
  background: var(--lf-paper-2);
  border: 1px solid var(--lf-rule);
}
.lf-filter-ochre .lf-filter-chip { color: var(--lf-ochre); }
.lf-filter-sage .lf-filter-chip { color: var(--lf-sage); }

/* ===== Results ===================================================== */
.lf-results { margin-bottom: 64px; }

.lf-blank {
  padding: 80px 24px;
  text-align: center;
}
.lf-blank-orn {
  font-family: var(--lf-display);
  font-size: 36px;
  color: var(--lf-vermillion);
  margin-bottom: 18px;
}
.lf-blank-text {
  font-family: var(--lf-display);
  font-style: italic;
  font-size: 16px;
  color: var(--lf-ink-3);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}
.lf-blank-link {
  background: none;
  border: none;
  color: var(--lf-vermillion);
  font: inherit;
  font-style: italic;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(139, 26, 26, 0.4);
}
.lf-blank-link:hover { text-decoration-color: var(--lf-vermillion); }

/* Couplet hover */
.lf-couplet { transition: background 0.18s; }
.lf-couplet:hover { background: rgba(139, 26, 26, 0.025); }
.lf-couplet:hover .lf-couplet-num { font-weight: 600; }

.lf-couplet-list {
  display: flex;
  flex-direction: column;
}
.lf-couplet {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 22px 0 22px;
  border-bottom: 1px solid var(--lf-rule);
}
.lf-couplet:first-child { border-top: 1px solid var(--lf-rule); }
.lf-couplet-marker {
  text-align: right;
  padding-top: 4px;
}
.lf-couplet-num {
  font-family: var(--lf-display);
  font-size: 22px;
  font-style: italic;
  color: var(--lf-vermillion);
  font-variant-numeric: oldstyle-nums;
  line-height: 1;
}
.lf-couplet-type {
  font-family: var(--lf-serif);
  font-size: 11px;
  color: var(--lf-ink-3);
  letter-spacing: 0.16em;
  margin-top: 8px;
}
.lf-couplet-text {
  font-family: var(--lf-serif);
  font-size: 30px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--lf-ink);
  margin-bottom: 8px;
  font-weight: 500;
}
.lf-couplet-comma, .lf-couplet-period {
  color: var(--lf-vermillion);
  margin: 0 4px;
  opacity: 0.7;
}
.lf-couplet-attr {
  display: flex;
  gap: 10px;
  font-family: var(--lf-display);
  font-size: 13px;
  color: var(--lf-ink-2);
  align-items: baseline;
}
.lf-attr-author {
  color: var(--lf-ink);
  font-weight: 500;
  font-family: var(--lf-serif);
  font-size: 15px;
}
.lf-attr-bar { color: var(--lf-rule); }
.lf-attr-title { font-style: italic; }

.lf-mark {
  background: var(--lf-vermillion-soft);
  color: var(--lf-vermillion);
  padding: 0 1px;
  font-weight: 700;
}

/* ===== End / colophon ============================================== */
.lf-end {
  text-align: center;
  padding: 32px 0 0;
  border-top: 1px solid var(--lf-ink);
  margin-top: 16px;
}
.lf-end-orn {
  font-family: var(--lf-display);
  font-size: 28px;
  color: var(--lf-vermillion);
  margin-bottom: 12px;
}
.lf-end-text {
  font-family: var(--lf-display);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lf-ink-3);
  text-transform: lowercase;
}

/* ===== Mobile / narrow viewport ==================================== */
/* The folio aesthetic was designed at 1080–1240px. Below ~720px we
   strip the manuscript margins, stack the hero, and shrink the
   manuscript grid so 七言's 14 cells fit on a phone. */
@media (max-width: 720px) {
  .lf-root {
    padding: 28px 18px 40px;
    line-height: 1.45;
  }
  .lf-page-rule,
  .lf-folio-no { display: none; }

  /* Hero — stack title above seal+meta */
  .lf-hero { margin-bottom: 36px; }
  .lf-hero-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-bottom: 16px;
  }
  .lf-kicker {
    font-size: 10px;
    letter-spacing: 0.32em;
    margin-bottom: 12px;
    gap: 10px;
  }
  .lf-display {
    font-size: clamp(72px, 22vw, 120px);
    margin-bottom: 14px;
    gap: 2px;
  }
  .lf-tagline { font-size: 14px; max-width: none; }
  .lf-hero-right {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 18px;
  }
  .lf-seal { width: 76px; height: 76px; }
  .lf-hero-meta { text-align: left; font-size: 14px; }

  /* Stats — 2x2 instead of 1x4 */
  .lf-ribbon {
    grid-template-columns: 1fr 1fr;
    margin-bottom: 36px;
  }
  .lf-ribbon-stat { padding: 14px 14px; }
  .lf-ribbon-value { font-size: 26px; margin-bottom: 4px; }
  .lf-ribbon-label { font-size: 10px; letter-spacing: 0.14em; }

  /* Section heads — wrap so the meta drops to a new line */
  .lf-compose-head {
    flex-wrap: wrap;
    gap: 6px 14px;
    margin-bottom: 22px;
    padding-bottom: 10px;
  }
  .lf-compose-eyebrow { font-size: 18px; }
  .lf-h2 { font-size: 22px; white-space: normal; }
  .lf-compose-zh { font-size: 14px; letter-spacing: 0.14em; }
  .lf-results-meta {
    margin-left: 0;
    width: 100%;
    text-align: left;
    font-size: 12px;
  }

  /* Compose section */
  .lf-compose { margin-bottom: 36px; }
  .lf-tabs { gap: 18px; margin-bottom: 22px; }
  .lf-tab { font-size: 14px; letter-spacing: 0.06em; }

  /* Manuscript — shrink cells so 14 of them fit at 375px */
  .lf-manuscript {
    padding: 20px 14px 16px;
    margin-bottom: 32px;
  }
  .lf-grid { gap: 4px; margin-bottom: 16px; }
  .lf-cell { width: 36px; height: 36px; }
  .lf-cell-char { font-size: 22px; }
  .lf-grid-break {
    font-size: 18px;
    padding: 2px 0;
    letter-spacing: 0.3em;
  }
  .lf-manuscript-actions { gap: 10px 12px; font-size: 12px; }

  /* Filters — single column */
  .lf-filters { grid-template-columns: 1fr; gap: 18px; }
  .lf-filter { padding: 14px 0 12px; }
  .lf-filter-zh { font-size: 16px; }
  .lf-filter-en { font-size: 10px; }

  /* Results */
  .lf-results { margin-bottom: 40px; }
  .lf-blank { padding: 48px 12px; }
  .lf-blank-orn { font-size: 28px; margin-bottom: 12px; }
  .lf-blank-text { font-size: 14px; line-height: 1.6; }
  .lf-couplet {
    grid-template-columns: 36px 1fr;
    gap: 12px;
    padding: 16px 0;
  }
  .lf-couplet-num { font-size: 18px; }
  .lf-couplet-type { font-size: 10px; margin-top: 6px; letter-spacing: 0.12em; }
  .lf-couplet-text {
    font-size: 20px;
    letter-spacing: 0.04em;
    line-height: 1.55;
    margin-bottom: 6px;
  }
  .lf-couplet-attr {
    flex-wrap: wrap;
    font-size: 12px;
    gap: 6px;
  }
  .lf-attr-author { font-size: 13px; }

  /* Colophon */
  .lf-end { padding-top: 24px; }
  .lf-end-orn { font-size: 22px; }
  .lf-end-text { font-size: 11px; letter-spacing: 0.1em; }
}

/* Extra-narrow phones — drop the cells one more notch so 14 fit at 360px. */
@media (max-width: 380px) {
  .lf-root { padding: 24px 14px 32px; }
  .lf-cell { width: 32px; height: 32px; }
  .lf-cell-char { font-size: 18px; }
  .lf-ribbon-value { font-size: 22px; }
  .lf-couplet-text { font-size: 18px; }
}