/*
 * language.css — Bilingual (EN/ZH) toggle & display rules
 * Minecraft Master Guide
 *
 * Architecture:
 *   body[data-lang="en"] shows .lang-en UI chrome, hides .lang-zh
 *   body[data-lang="zh"] shows .lang-zh UI chrome, hides .lang-en
 *
 *   CRITICAL: Content <article> sections are NEVER controlled by these
 *   lang rules — they are shown/hidden exclusively by the .active class
 *   added via JS showSection(). This prevents all ZH sections from
 *   displaying simultaneously when switching language.
 */

/* ════════════════════════════════════════
   LANGUAGE TOGGLE PILL
════════════════════════════════════════ */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 20px;
  padding: 3px;
  flex-shrink: 0;
}
.lang-btn {
  padding: 4px 12px;
  border-radius: 16px;
  border: none;
  background: none;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  letter-spacing: 0.3px;
  min-height: 32px; /* Touch target */
}
.lang-btn.active {
  background: var(--green);
  color: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.lang-btn:hover:not(.active) { color: rgba(255,255,255,0.85); }
.lang-btn:focus-visible { outline: 2px solid var(--green-light); outline-offset: 2px; }

/* ════════════════════════════════════════
   LANGUAGE LAYER: BLOCK ELEMENTS (UI chrome)
   Sidebar labels, badges, footer text, etc.
════════════════════════════════════════ */
.lang-en,
.lang-zh { display: none; }

body[data-lang="en"] .lang-en { display: block; }
body[data-lang="zh"] .lang-zh { display: block; }

/* ════════════════════════════════════════
   LANGUAGE LAYER: INLINE ELEMENTS
   Spans, links, buttons within text
════════════════════════════════════════ */
span.lang-en,  span.lang-zh,
a.lang-en,     a.lang-zh,
button.lang-en,button.lang-zh { display: inline !important; }

body[data-lang="en"] span.lang-zh,
body[data-lang="en"] a.lang-zh,
body[data-lang="en"] button.lang-zh { display: none !important; }

body[data-lang="zh"] span.lang-en,
body[data-lang="zh"] a.lang-en,
body[data-lang="zh"] button.lang-en { display: none !important; }

/* ════════════════════════════════════════
   CRITICAL RULE: CONTENT SECTIONS
   Article elements are NEVER shown by lang rules.
   Only .active (set by JS) controls their visibility.
════════════════════════════════════════ */
body[data-lang="zh"] article.lang-zh,
body[data-lang="en"] article.lang-en { display: none; }

/* The active article always wins, regardless of lang rules */
article.content-section.active { display: block !important; }

/* ════════════════════════════════════════
   SIDEBAR: BILINGUAL NAV LABELS
════════════════════════════════════════ */
.nav-label-zh { display: none; }
body[data-lang="zh"] .nav-label    { display: none; }
body[data-lang="zh"] .nav-label-zh { display: inline; }

/* ════════════════════════════════════════
   CHINESE TYPOGRAPHY
   Font stack covers: macOS, iOS, Windows, Linux
════════════════════════════════════════ */
body[data-lang="zh"] {
  font-family: 'Outfit', 'PingFang SC', 'Hiragino Sans GB',
               'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
}
body[data-lang="zh"] .page-hero h1 { letter-spacing: 0.5px; }

/* ════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════ */
@media (max-width: 480px) {
  .lang-btn { padding: 4px 8px; font-size: 0.72rem; }
}