/* ===========================================================
   Language selector UI + per-language font overrides
   Shared across landing, upsell, cheat sheets, PDF
   =========================================================== */

/* Fixed placement (used on pages without a nav bar, e.g. the upsell) */
.lang-fixed { position: fixed; top: 14px; right: 16px; z-index: 100; }
.lang-fixed .lang-toggle { background: var(--navy); color: #fff; border-color: rgba(255,255,255,.22); box-shadow: var(--sh-md, 0 8px 24px rgba(8,30,47,.12)); }
.lang-fixed .lang-toggle:hover { background: var(--navy-700); }
@media print { .lang-fixed, .lang-select { display: none !important; } }

.lang-select { position: relative; display: inline-flex; }
.lang-toggle {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--sans); font-size: 14px; font-weight: 600;
  background: rgba(255,255,255,.08); color: #fff;
  border: 1px solid rgba(255,255,255,.18); border-radius: var(--r-pill, 999px);
  padding: 8px 13px; cursor: pointer; transition: background .2s, border-color .2s;
  line-height: 1;
}
.lang-toggle:hover { background: rgba(255,255,255,.14); }
.lang-toggle .globe { width: 16px; height: 16px; flex: none; }
.lang-toggle .lang-current { min-width: 18px; text-align: left; }
.lang-toggle .caret { width: 0; height: 0; border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 5px solid currentColor; opacity: .7; }

/* On solid (light) nav */
.nav.solid .lang-toggle { background: #fff; color: var(--navy-900); border-color: var(--line); }
.nav.solid .lang-toggle:hover { border-color: var(--navy); }

.lang-menu {
  position: absolute; top: calc(100% + 10px); right: 0; z-index: 90;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md, 14px);
  box-shadow: var(--sh-lg, 0 26px 60px rgba(8,30,47,.18)); padding: 7px; min-width: 168px;
  display: none; flex-direction: column; gap: 2px;
}
.lang-select.open .lang-menu { display: flex; }
.lang-menu button {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  font-family: var(--sans); font-size: 15px; font-weight: 500; color: var(--ink);
  background: none; border: 0; border-radius: 9px; padding: 10px 12px; cursor: pointer;
  text-align: left; width: 100%; transition: background .15s;
}
.lang-menu button:hover { background: var(--bg-alt); }
.lang-menu button.active { background: var(--teal-tint); color: var(--teal-600); font-weight: 600; }
.lang-menu button.active::after { content: ""; width: 9px; height: 5px; border: 2px solid var(--teal-600); border-top: 0; border-right: 0; transform: rotate(-45deg) translateY(-1px); }

/* ---------- Per-language font overrides ----------
   The whole design is driven by --serif / --serif-disp / --sans / --mono,
   so swapping these variables re-skins every element with glyph-complete fonts. */
html.lang-zh {
  --serif: "Noto Serif SC", serif;
  --serif-disp: "Noto Serif SC", serif;
  --sans: "Noto Sans SC", system-ui, sans-serif;
  --mono: "Noto Sans SC", system-ui, sans-serif;
}
html.lang-hi {
  --serif: "Noto Serif Devanagari", serif;
  --serif-disp: "Noto Serif Devanagari", serif;
  --sans: "Noto Sans Devanagari", system-ui, sans-serif;
  --mono: "Noto Sans Devanagari", system-ui, sans-serif;
}
/* Latin-styling that reads awkwardly in CJK / Devanagari */
html.lang-zh .eyebrow, html.lang-hi .eyebrow,
html.lang-zh .tagp, html.lang-hi .tagp,
html.lang-zh .kicker, html.lang-hi .kicker,
html.lang-zh .flag, html.lang-hi .flag,
html.lang-zh .b-kicker, html.lang-hi .b-kicker {
  text-transform: none; letter-spacing: .01em;
}
html.lang-zh h1, html.lang-zh h2, html.lang-zh h3,
html.lang-hi h1, html.lang-hi h2, html.lang-hi h3 { letter-spacing: 0; }
/* CJK has no real italic; keep emphasis upright so it stays legible */
html.lang-zh .serif-em, html.lang-zh em, html.lang-zh .hero h1 em,
html.lang-zh .intro-lead, html.lang-zh .chap-dek {
  font-style: normal;
}