/* Voynich Studies - dark manuscript theme. Sepia-black ground, parchment ink, gold accents. */
:root {
  --bg: #1a1610;          /* dark aged sepia */
  --bg2: #14110c;         /* deepest (hero/footer) */
  --panel: #241d14;       /* cards/panels */
  --panel2: #2b2318;      /* raised */
  --ink: #ece3ce;         /* parchment cream text */
  --ink-soft: #ac9f85;    /* muted tan */
  --rule: #3a3123;        /* borders */
  --accent: #cba45e;      /* manuscript gold */
  --accent-soft: #9c7d45;
  --link: #d4b06a;        /* warm gold link */
  --code-bg: #2b2318;
  --ok: #8aa662;          /* manuscript green (foliage) */
  --warn: #cc824e;        /* rubric red-orange */
  --maxw: 760px;
  /* Шрифт интерфейса и текста: системный гротеск - SF Pro на Apple, Segoe UI на Windows,
     Roboto на Android. Полная кириллица и латиница, нулевая загрузка, как у большинства
     современных новостных порталов. */
  --font-ui: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto,
             "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 17.5px;
  line-height: 1.66;
  -webkit-font-smoothing: antialiased;
}
/* subtle manuscript texture, site-wide */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: url(../figs/texture.jpg) center/cover no-repeat;
  opacity: 0.05; mix-blend-mode: screen;
}

/* ---- top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(20, 17, 12, 0.90);
  backdrop-filter: saturate(1.1) blur(6px);
  border-bottom: 1px solid var(--rule);
}
.topbar-in {
  max-width: none; margin: 0; padding: 0 15px;   /* шапка выровнена по краю контента (15 px) */
  display: flex; align-items: center; gap: 20px; min-height: 60px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand svg { width: 30px; height: 30px; flex: 0 0 auto; }
.brand b { font-size: 17px; letter-spacing: .01em; }
.brand span { display: block; font-size: 11.5px; color: var(--ink-soft); letter-spacing: .06em; text-transform: uppercase; }
#site-nav { margin-left: auto; display: flex; gap: 1px; flex-wrap: nowrap; }

/* language switch */
.lang-switch { display: inline-flex; border: 1px solid var(--rule); border-radius: 8px; overflow: hidden; flex: 0 0 auto; }
.lang-btn {
  appearance: none; border: 0; background: transparent; cursor: pointer;
  font-family: system-ui, sans-serif; font-size: 12.5px; font-weight: 600; letter-spacing: .03em;
  color: var(--ink-soft); padding: 6px 10px;
}
.lang-btn + .lang-btn { border-left: 1px solid var(--rule); }
.lang-btn:hover { background: var(--code-bg); color: var(--ink); }
.lang-btn.active { background: var(--accent); color: var(--bg); }
.lang-btn:focus-visible { outline: 2px solid var(--link); outline-offset: -2px; }

.lang-note {
  font-family: system-ui, sans-serif; font-size: 13.5px; line-height: 1.5; color: var(--ink-soft);
  background: var(--code-bg); border-left: 3px solid var(--accent-soft);
  border-radius: 0 8px 8px 0; padding: 10px 16px; margin: 0 0 24px;
}
.nav-link {
  text-decoration: none; color: var(--ink-soft); font-size: 12.5px;
  padding: 6px 8px; border-radius: 7px; font-family: system-ui, sans-serif;
  white-space: nowrap; display: inline-flex; align-items: center; gap: 5px;
}
.nav-ico { width: 13px; height: 13px; flex: 0 0 auto; opacity: .75; }
.nav-link:hover { background: var(--code-bg); color: var(--ink); }
.nav-link:hover .nav-ico { opacity: 1; }
.nav-link.active { background: var(--accent); color: var(--bg); }
.nav-link.active .nav-ico { opacity: 1; }

/* ---- layout ---- */
main {
  max-width: var(--maxw); margin: 0 auto; padding: 44px 20px 80px;
}
main.has-toc { max-width: 1040px; display: grid; grid-template-columns: 1fr 220px; gap: 44px; align-items: start; }
main.has-toc .page-head, main.has-toc .page-body { grid-column: 1; max-width: var(--maxw); }
.toc {
  grid-column: 2; grid-row: 1 / 99; position: sticky; top: 84px;
  font-family: system-ui, sans-serif; font-size: 13.5px; line-height: 1.5;
  border-left: 2px solid var(--rule); padding-left: 16px;
}
.toc-title { display: block; text-transform: uppercase; letter-spacing: .08em; font-size: 11px; color: var(--ink-soft); margin-bottom: 8px; }
.toc a { display: block; color: var(--ink-soft); text-decoration: none; padding: 3px 0; }
.toc a:hover { color: var(--link); }

/* ---- page head ---- */
h1, h2, h3, h4 { font-weight: 700; letter-spacing: -.014em; }
.lead { letter-spacing: -.006em; }

.page-head { border-bottom: 1px solid var(--rule); padding-bottom: 22px; margin-bottom: 30px; }
.eyebrow { font-family: system-ui, sans-serif; text-transform: uppercase; letter-spacing: .1em; font-size: 12px; color: var(--accent); margin: 0 0 8px; }
h1 { font-size: 2.05rem; line-height: 1.18; margin: 0; font-weight: 600; }
.pubdate { font-family: system-ui, sans-serif; font-size: 13px; color: var(--ink-soft); margin: 12px 0 0; }

/* ---- prose ---- */
.page-body h2 { font-size: 1.42rem; margin: 2.1em 0 .5em; font-weight: 600; }
.page-body h3 { font-size: 1.12rem; margin: 1.6em 0 .4em; font-weight: 600; }
.page-body h4 { font-size: 1rem; margin: 1.4em 0 .3em; color: var(--ink-soft); }
.page-body p { margin: 0 0 1.05em; }
.lead { font-size: 1.16rem; line-height: 1.55; }
.muted { color: var(--ink-soft); font-size: .92rem; border-top: 1px solid var(--rule); padding-top: 16px; margin-top: 34px; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
strong { font-weight: 640; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; font-size: .86em; font-family: "SF Mono", ui-monospace, Menlo, monospace; }
ul { padding-left: 1.25em; }
li { margin: .3em 0; }

/* ---- figures ---- */
figure { margin: 1.8em 0; text-align: center; }
figure img { max-width: 100%; height: auto; border: 1px solid var(--rule); border-radius: 8px; background: #efe7d0; }
figcaption { font-family: system-ui, sans-serif; font-size: 13px; color: var(--ink-soft); margin-top: 8px; }

/* ---- tables ---- */
.tbl-wrap { overflow-x: auto; margin: 1.5em 0; }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; font-family: system-ui, sans-serif; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }
thead th { background: var(--code-bg); font-weight: 600; }
tbody tr:hover { background: var(--panel2); }

footer {
  border-top: 1px solid var(--rule); background: var(--panel);
  font-family: system-ui, sans-serif; font-size: 13px; color: var(--ink-soft);
}
.footer-in { max-width: none; margin: 0; padding: 24px 15px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 880px) {
  main.has-toc { grid-template-columns: 1fr; }
  .toc { display: none; }
}

/* ---- mobile top bar: brand + lang on one row, nav as a swipeable strip below ---- */
@media (max-width: 760px) {
  .topbar-in { flex-wrap: wrap; gap: 10px 16px; min-height: 0; padding-top: 9px; }
  .brand { order: 1; }
  .lang-switch { order: 2; margin-left: auto; }
  #site-nav {
    order: 3; margin-left: 0; width: 100%;
    flex-wrap: nowrap; overflow-x: auto; gap: 2px; padding-bottom: 8px;
    -webkit-overflow-scrolling: touch; scrollbar-width: none;
  }
  #site-nav::-webkit-scrollbar { display: none; }
  .nav-link { font-size: 14px; padding: 7px 11px; }
  .footer-in { flex-direction: column; gap: 8px; }
}

@media (max-width: 560px) {
  body { font-size: 17px; }
  main { padding: 28px 16px 60px; }
  h1 { font-size: 1.66rem; }
  .lead { font-size: 1.08rem; }
  .page-body h2 { font-size: 1.3rem; }
  .brand span { display: none; }
}