/* Wayhelm extras: a11y, lang switch, mobile nav, accordion, uncrowded EN nav */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: #38bdf8;
  color: #0f172a;
  font-weight: 700;
  border-radius: 0 0 0.5rem 0;
}
.skip-link:focus { left: 0; }

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.lang-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: #94a3b8;
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11px;
  padding: 0.35rem 0.5rem;
  border-radius: 0.375rem;
  cursor: pointer;
  line-height: 1;
}
.lang-btn:hover { color: #f8fafc; }
.lang-btn.is-active {
  background: rgba(56, 189, 248, 0.18);
  color: #67e8f9;
  border: 1px solid rgba(56, 189, 248, 0.35);
}

.site-nav .nav-link {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.55rem;
  border-radius: 0.4rem;
  white-space: nowrap;
  letter-spacing: 0;
}
.site-nav .nav-link:hover {
  color: #67e8f9;
  background: rgba(255, 255, 255, 0.04);
}

/* EN: slightly tighter type, more breathing room between items */
body.lang-en .site-nav {
  gap: 0.35rem;
}
body.lang-en .site-nav .nav-link {
  font-size: 0.8125rem;
  padding: 0.4rem 0.65rem;
  letter-spacing: 0.01em;
}

.nav-toggle {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #e2e8f0;
  font-size: 12px;
  padding: 0.35rem 0.6rem;
  border-radius: 0.5rem;
  cursor: pointer;
}
.nav-toggle:hover {
  border-color: rgba(56, 189, 248, 0.4);
  color: #67e8f9;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  padding: 0.5rem 1rem 0.85rem;
  gap: 0.15rem;
}
.mobile-nav[hidden] { display: none !important; }
.mobile-nav a {
  color: #cbd5e1;
  padding: 0.7rem 0.75rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-size: 0.95rem;
}
.mobile-nav a:hover {
  background: rgba(255, 255, 255, 0.04);
  color: #67e8f9;
}

.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  font-family: "DM Mono", ui-monospace, monospace;
  font-size: 11px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.75rem;
  border-radius: 0.55rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.28);
  color: #7dd3fc;
  font-size: 0.8125rem;
  font-weight: 600;
}
.tag-chip.tag-emerald {
  background: rgba(52, 211, 153, 0.08);
  border-color: rgba(52, 211, 153, 0.28);
  color: #6ee7b7;
}
.tag-chip.tag-amber {
  background: rgba(251, 191, 36, 0.08);
  border-color: rgba(251, 191, 36, 0.28);
  color: #fcd34d;
}

/* Accordion */
.acc { width: 100%; }
.acc > summary {
  list-style: none;
  cursor: pointer;
}
.acc > summary::-webkit-details-marker { display: none; }

.acc-sum {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0.9rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(15, 23, 42, 0.55);
  color: #e2e8f0;
  font-size: 0.875rem;
  font-weight: 600;
}
.acc-sum::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 0.3rem;
  background: rgba(56, 189, 248, 0.12);
  color: #67e8f9;
  font-family: "DM Mono", monospace;
  font-size: 0.75rem;
  flex-shrink: 0;
}
.acc[open] > .acc-sum::before { content: "−"; }

.acc-sum-card {
  display: block;
  cursor: pointer;
  padding: 0.85rem 1rem;
  color: #e2e8f0;
}
.acc-sum-card::after {
  content: "+";
  float: right;
  color: #67e8f9;
  font-family: "DM Mono", monospace;
  font-size: 0.85rem;
}
.acc[open] > .acc-sum-card::after { content: "−"; }

.acc-panel > .acc-sum { margin-bottom: 0; }
.acc-panel[open] > .acc-sum {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}
.acc-panel[open] > .acc-body {
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-top: 0;
  border-radius: 0 0 0.75rem 0.75rem;
  background: rgba(15, 23, 42, 0.45);
}

.acc-body {
  padding: 0.85rem 1rem 1rem;
  color: #94a3b8;
}

.acc-card[open] {
  border-color: rgba(56, 189, 248, 0.25);
}

#wechat-copy.is-copied,
#wechat-copy-hero.is-copied {
  background: #34d399 !important;
}

/* Slightly airier section rhythm on EN */
body.lang-en main .max-w-6xl {
  letter-spacing: 0.005em;
}
body.lang-en .font-display-hero {
  letter-spacing: -0.01em;
}