/* exarch.css — Byzantine-chancery heraldic identity.
   Parchment stone substrate, porphyry + antique gold imperial accents.
   A gold double-headed eagle on a porphyry shield is the one bold mark;
   prose is set as a decree (serif), the machine speaks in mono.
   Page-specific styles in landing.css and doc.css. */

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

:root {
  /* parchment-day */
  --parchment:  #e7e0ce;
  --parchment-2:#ded6c2;
  --face:       #d8d0bc;
  --line:       #c4ba9f;
  --ink:        #2a2016;
  --ink-2:      #5c5240;
  --muted:      #857a5a;
  --porphyry:   #6b2a44;
  --porphyry-2: #893a55;
  --gold:       #927518;
  --gold-bright:#c8a23f;
  --crest-field:#231219;
  --on:         #466b4c;
  --off:        #8d7a6a;
  --crest-text: #f1e8d2;

  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --art:  ui-monospace, 'SF Mono', Menlo, 'DejaVu Sans Mono', monospace;
  --serif:'Iowan Old Style', 'Palatino Linotype', Palatino, 'Hoefler Text',
          Georgia, 'Times New Roman', serif;
}

:root.dark {
  /* porphyry-night */
  --parchment:  #14110c;
  --parchment-2:#1b1610;
  --face:       #221a15;
  --line:       #382a20;
  --ink:        #e7e0ce;
  --ink-2:      #b4a98c;
  --muted:      #8a7d60;
  --porphyry:   #c66e8a;
  --porphyry-2: #d98aa4;
  --gold:       #c8a23f;
  --gold-bright:#dcbb5e;
  --crest-field:#1a0e13;
  --on:         #6fa178;
  --off:        #7d7060;
  --crest-text: #f1e8d2;
}

html {
  background: var(--parchment);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--porphyry); text-decoration: none; text-underline-offset: 0.18em; }
a:hover { color: var(--porphyry-2); text-decoration: underline; }

/* ── chancery menubar ── */
.menubar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 0.1rem;
  padding: 0.35rem 0.8rem;
  background: var(--parchment-2);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  line-height: 1.2;
}
.menubar .spacer { flex: 1 1 auto; }
.menubar .toc {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.7rem;
}
.menubar .toc a { color: var(--muted); letter-spacing: 0.04em; }
.menubar .toc a:hover { color: var(--porphyry); text-decoration: none; }

.menu-item {
  display: flex;
  align-items: center;
  padding: 0.3rem 0.7rem;
  color: var(--ink-2);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  border-bottom: 2px solid transparent;
}
.menu-item:hover { color: var(--porphyry); text-decoration: none; }
.menu-item.current { color: var(--ink); border-bottom-color: var(--gold); }
.menu-item .ext { font-size: 0.66rem; opacity: 0.6; }

/* ── theme toggle ── */
.theme-toggle {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.7rem;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-2);
  font-family: var(--mono);
  font-size: 0.78rem;
  cursor: pointer;
  user-select: none;
}
.theme-toggle:hover { border-color: var(--gold); color: var(--ink); }
.theme-toggle .glyph { font-size: 0.85rem; line-height: 1; }

/* ── gold-framed document window (doc pages) ── */
.window {
  background: var(--parchment-2);
  border: 1px solid var(--gold);
  box-shadow: 0 0 0 1px var(--line), 0 14px 40px rgba(20,8,12,0.16);
}
.titlebar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.7rem;
  background: var(--crest-field);
  color: var(--crest-text);
  border-bottom: 1px solid var(--gold);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  user-select: none;
  cursor: default;
}
.titlebar .app-icon {
  flex: 0 0 auto;
  color: var(--gold-bright);
  font-size: 0.8rem;
  line-height: 1;
}
.title-text { flex: 0 1 auto; }
.window-body { padding: 0; }

/* ── footer ── */
.footer {
  position: relative;
  z-index: 1;
  max-width: 53rem;
  margin: 0 auto;
  width: 100%;
  margin-top: auto;
  padding: 1.6rem 1.2rem 2.4rem;
  text-align: center;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
.footer a { color: var(--ink-2); }
.footer a:hover { color: var(--porphyry); }

/* ── responsive ── */
@media (max-width: 36rem) {
  .menu-item { padding: 0.28rem 0.5rem; font-size: 0.78rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}