/* ============================================
   The Watercourse Way — Lao Tzu's Tao Te Ching
   "Ink-wash & water" design system
   ============================================ */

:root {
  /* Ground: warm rice-paper (xuan) under soft ink */
  --color-bg: #F2EFE6;
  --color-surface: #FBFAF5;
  --color-text: #21201A;          /* warm ink, never pure black */
  --color-text-muted: #6B665A;    /* ink-wash grey */
  --color-border: #DED8C9;

  --color-primary: #2E6E60;       /* jade / celadon — links, brand */
  --color-primary-light: #3E8A78;
  --color-primary-dark: #235447;

  --color-accent: #B0472E;        /* cinnabar — the seal-red, used sparingly */
  --color-accent-light: #C75C40;
  --color-accent-dark: #8E3923;

  /* Five lens colors — muted, inky, harmonious on paper */
  --color-lens-ochre:    #9A6B1F;  /* CYN — Cynefin */
  --color-lens-teal:     #1F7A7A;  /* CYB — Cybernetics */
  --color-lens-indigo:   #3B5BA0;  /* COG — Cognitive science */
  --color-lens-slate:    #4A7C8C;  /* PRO — Process philosophy */
  --color-lens-cinnabar: #A8432B;  /* SKP — Skeptic */

  --color-scrollbar: #CDC6B5;
}

.dark {
  /* Ground: wet ink-stone at night */
  --color-bg: #15140E;
  --color-surface: #201E16;
  --color-text: #ECE7D8;
  --color-text-muted: #9C9685;
  --color-border: #343228;

  --color-primary: #6FB6A6;
  --color-primary-light: #8FCBBC;
  --color-primary-dark: #4F9486;

  --color-accent: #E0795E;
  --color-accent-light: #ED9277;

  --color-lens-ochre:    #D2A24A;
  --color-lens-teal:     #4FB8B8;
  --color-lens-indigo:   #7E9BD6;
  --color-lens-slate:    #79B0C0;
  --color-lens-cinnabar: #E0795E;

  --color-scrollbar: #3A372C;
}

html { scroll-behavior: smooth; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background-color: var(--color-scrollbar); border-radius: 20px; }

/* --- Prose adjustments for lens readings --- */
.prose { color: var(--color-text); }
.prose strong { color: var(--color-text); }
.prose a { color: var(--color-primary); text-decoration: none; }
.prose a:hover { text-decoration: underline; }
.prose code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background-color: rgba(46, 110, 96, 0.09);
  color: var(--color-primary);
  padding: 0.15em 0.4em;
  border-radius: 0.25rem;
}
.dark .prose code { background-color: rgba(111, 182, 166, 0.13); }
.prose pre {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.prose blockquote {
  border-left-color: var(--color-accent);
  color: var(--color-text-muted);
  font-style: italic;
}
.prose h2 { scroll-margin-top: 5rem; font-family: 'Spectral', serif; }
.prose h3 { scroll-margin-top: 5rem; font-family: 'Spectral', serif; }

/* --- Lens cards --- */
.lens-card {
  position: relative;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.lens-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(33, 32, 26, 0.06);
}

.lens-ochre    { border-left: 3px solid var(--color-lens-ochre);    }
.lens-teal     { border-left: 3px solid var(--color-lens-teal);     }
.lens-indigo   { border-left: 3px solid var(--color-lens-indigo);   }
.lens-slate    { border-left: 3px solid var(--color-lens-slate);    }
.lens-cinnabar { border-left: 3px solid var(--color-lens-cinnabar); }

.lens-icon-ochre    { color: var(--color-lens-ochre);    }
.lens-icon-teal     { color: var(--color-lens-teal);     }
.lens-icon-indigo   { color: var(--color-lens-indigo);   }
.lens-icon-slate    { color: var(--color-lens-slate);    }
.lens-icon-cinnabar { color: var(--color-lens-cinnabar); }

/* --- Read page: lens toggles + chips --- */
.lens-toggle.is-on {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
  color: var(--color-text);
}
.lens-toggle.is-on .lens-toggle-dot { opacity: 1 !important; }

.lens-chip.is-open {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
  color: var(--color-text);
}

.lens-block { animation: lens-reveal 0.18s ease-out; }
@keyframes lens-reveal {
  from { opacity: 0; transform: translateY(-2px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- Lens switcher (sub-nav across /read/ and /read/{lens}/ pages) --- */
.lens-switch-tab {
  border-bottom: 2px solid transparent;
  color: var(--color-text-muted);
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}
.lens-switch-tab:hover { color: var(--color-text); background-color: var(--color-surface); }
.lens-switch-tab.is-active {
  color: var(--color-text);
  border-bottom-color: var(--tab-active-color, var(--color-primary));
  background-color: var(--color-surface);
}
.lens-switch-tab[data-lens="cyn"].is-active { --tab-active-color: var(--color-lens-ochre);    }
.lens-switch-tab[data-lens="cyb"].is-active { --tab-active-color: var(--color-lens-teal);     }
.lens-switch-tab[data-lens="cog"].is-active { --tab-active-color: var(--color-lens-indigo);   }
.lens-switch-tab[data-lens="pro"].is-active { --tab-active-color: var(--color-lens-slate);    }
.lens-switch-tab[data-lens="skp"].is-active { --tab-active-color: var(--color-lens-cinnabar); }

/* --- Chapter TOC (jump-nav on read pages) --- */
.chapter-toc-link {
  display: inline-block;
  min-width: 1.5rem;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.15s ease;
  font-variant-numeric: tabular-nums;
}
.chapter-toc-link:hover { color: var(--toc-active-color, var(--color-primary)); }
.chapter-toc-link.is-active { color: var(--toc-active-color, var(--color-primary)); font-weight: 600; }
.chapter-toc[data-lens="cyn"] { --toc-active-color: var(--color-lens-ochre);    }
.chapter-toc[data-lens="cyb"] { --toc-active-color: var(--color-lens-teal);     }
.chapter-toc[data-lens="cog"] { --toc-active-color: var(--color-lens-indigo);   }
.chapter-toc[data-lens="pro"] { --toc-active-color: var(--color-lens-slate);    }
.chapter-toc[data-lens="skp"] { --toc-active-color: var(--color-lens-cinnabar); }
.chapter-toc-sep {
  display: inline-block;
  width: 1px;
  height: 0.75rem;
  background-color: var(--color-border);
  vertical-align: middle;
  opacity: 0.6;
}

/* --- Chinese text rendering: a song-style serif, airy tracking --- */
.chinese-text {
  font-family: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "PingFang SC", serif;
  letter-spacing: 0.05em;
}

/* --- Chapter cards on indexes --- */
.chapter-card { transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease; }
.chapter-card:hover { transform: translateY(-2px); }

/* --- Hero: a single brushed 道 floating as a faint ink field --- */
.hero-ghost {
  position: absolute;
  top: 50%;
  right: 0%;
  transform: translateY(-50%);
  font-family: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", serif;
  font-size: clamp(16rem, 34vw, 32rem);
  line-height: 0.8;
  letter-spacing: 0;
  white-space: nowrap;
  color: var(--color-primary);
  opacity: 0.06;
  user-select: none;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to left, #000 40%, transparent 88%);
  mask-image: linear-gradient(to left, #000 40%, transparent 88%);
}
.dark .hero-ghost { opacity: 0.08; }
@media (max-width: 1023px) { .hero-ghost { display: none; } }

/* --- Chapter relic: hanging numeral in the margin --- */
.chapter-numeral { display: none; }
@media (min-width: 1024px) {
  .chapter-numeral {
    display: block;
    position: absolute;
    left: 0;
    top: -0.5rem;
    width: 4.5rem;
    padding-right: 1rem;
    text-align: right;
    font-family: 'Spectral', serif;
    font-weight: 300;
    font-size: 3.75rem;
    line-height: 1;
    color: var(--color-accent);
    opacity: 0.32;
    font-variant-numeric: tabular-nums;
    user-select: none;
  }
}

/* --- A faint "seal" mark beside the masthead --- */
.seal-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border: 1.5px solid var(--color-accent);
  border-radius: 0.2rem;
  color: var(--color-accent);
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  font-size: 0.95rem;
  line-height: 1;
}

/* --- Infographic SVG defaults --- */
.infographic {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  overflow: hidden;
}
.infographic svg { display: block; max-width: 100%; height: auto; margin: 0 auto; }
.infographic-caption {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
  font-style: italic;
}

/* SVG palette tokens (used inline via classes) */
.svg-stroke-text { stroke: var(--color-text); }
.svg-fill-text { fill: var(--color-text); }
.svg-fill-muted { fill: var(--color-text-muted); }
.svg-fill-bg { fill: var(--color-bg); }
.svg-fill-surface { fill: var(--color-surface); }
.svg-stroke-border { stroke: var(--color-border); }
.svg-fill-primary { fill: var(--color-primary); }
.svg-stroke-primary { stroke: var(--color-primary); }
.svg-fill-accent { fill: var(--color-accent); }
.svg-stroke-accent { stroke: var(--color-accent); }

/* line-clamp fallback */
.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media print {
  .navbar, .mobile-menu, footer, .dark-toggle { display: none !important; }
  .prose { max-width: 100% !important; }
  body { color: #000 !important; background: #fff !important; }
}

/* ============================================================
   Maturity — per chapter×lens human-review state
   ============================================================ */
:root {
  --color-maturity-draft:     var(--color-text-muted);
  --color-maturity-in-review: var(--color-accent);
  --color-maturity-settling:  var(--color-primary);
  --color-maturity-stable:    #2E7D45;
}
.dark { --color-maturity-stable: #6BD68A; }

.maturity-marker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.85rem;
  margin-top: 1.1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}
.maturity-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.15rem 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  white-space: nowrap;
}
.maturity-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--m-color, var(--color-text-muted));
  flex-shrink: 0;
}
.maturity-status { color: var(--color-text); font-weight: 500; }
.maturity-never  { font-style: italic; }
.maturity-note   { text-transform: none; letter-spacing: normal; font-style: italic; }
.maturity-draft     { --m-color: var(--color-maturity-draft); }
.maturity-in-review { --m-color: var(--color-maturity-in-review); }
.maturity-settling  { --m-color: var(--color-maturity-settling); }
.maturity-stable    { --m-color: var(--color-maturity-stable); }

.maturity-open-questions {
  margin-top: 0.75rem;
  padding: 0.7rem 0.95rem;
  border: 1px dashed var(--color-border);
  border-radius: 0.375rem;
}
.maturity-oq-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0 0 0.4rem;
}
.maturity-oq-attr { font-weight: 400; opacity: 0.8; }
.maturity-open-questions ul { margin: 0; padding-left: 1.15rem; list-style: disc; }
.maturity-open-questions li {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text);
  margin: 0.2rem 0;
}

/* The 81 × 5 dashboard grid (/status/) */
.maturity-grid { width: 100%; border-collapse: collapse; font-size: 0.8125rem; }
.maturity-grid th, .maturity-grid td {
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.5rem;
  text-align: center;
}
.maturity-grid thead th {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: 500;
  background: var(--color-surface);
  position: sticky;
  top: 4rem;
  z-index: 10;
}
.maturity-grid th.maturity-rowhead {
  text-align: left;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 400;
  white-space: nowrap;
}
.maturity-grid th.maturity-rowhead a { color: var(--color-text); text-decoration: none; }
.maturity-grid th.maturity-rowhead a:hover { color: var(--color-primary); }
.maturity-cell { padding: 0 !important; }
.maturity-cell a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.1rem;
  text-decoration: none;
}
.maturity-cell a:hover { background: var(--color-surface); }
.maturity-cell .maturity-dot { width: 0.7rem; height: 0.7rem; }
.maturity-cell.has-oq .maturity-dot {
  box-shadow: 0 0 0 2px var(--color-bg), 0 0 0 3px var(--m-color, var(--color-text-muted));
}

.maturity-legend { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; }
.maturity-legend-item { display: flex; align-items: baseline; gap: 0.5rem; }
.maturity-legend-item .maturity-dot { position: relative; top: 1px; }
.maturity-legend-count {
  font-family: 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
  font-weight: 600;
}