/* wenxin-layout.css - 页面主布局：双栏/单栏切换、主内容区、页脚 */
/* Browser compat banner uses hard-coded values (no CSS custom properties)
   to remain visible on browsers that don't support them */
#browser-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 20px;
  background: #8B3525;
  color: #fff;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  position: sticky;
  top: 0;
  z-index: 10000;
}

#browser-banner a {
  color: #fff;
  text-underline-offset: 2px;
}

#browser-banner button {
  background: none;
  border: 1px solid rgba(255,255,255,0.6);
  color: #fff;
  cursor: pointer;
  padding: 2px 8px;
  font-size: 16px;
  border-radius: 2px;
  flex-shrink: 0;
  line-height: 1;
}

/* ── Base layout: two-column sidebar + content (home/category/about/default) ──
 * Post pages are EXCLUDED here — post.css handles them with a centered
 * single-column layout via body.page-post .page-layout (higher specificity,
 * no conflict because this rule simply doesn't match body.page-post). ──── */
body:not(.page-post) .page-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-32);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-32) clamp(24px, 6vw, 72px);
  min-height: 100vh;   /* iOS Safari legacy fallback */
  min-height: 100dvh;  /* Modern: dynamic viewport, excludes address bar */
  animation: fadeUp var(--duration-slow) var(--ease-out) forwards;
}

/* Cap width to prevent content from over-stretching on 2K/4K screens */
body {
  max-width: 1600px;
  margin-inline: auto;
}

.nav-progress {
  position: fixed;
  top: 0;
  top: env(safe-area-inset-top, 0);  /* Notch / Dynamic Island on iOS */
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  z-index: 9998;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
  pointer-events: none;
}

.nav-progress.is-loading {
  opacity: 1;
  animation: navProgressAdvance var(--duration-slow) var(--ease-out) forwards;
}

.nav-progress.is-complete {
  width: 100% !important;
  animation: none;
  opacity: 0;
  transition: width 100ms var(--ease-out), opacity 300ms var(--ease-out) 100ms;
}

@keyframes navProgressAdvance {
  from { width: 0; }
  to   { width: 85%; }
}

.pjax-toast {
  position: fixed;
  bottom: max(var(--space-6), calc(env(safe-area-inset-bottom, 0px) + var(--space-4)));
  right: max(var(--space-6), calc(env(safe-area-inset-right, 0px) + var(--space-4)));
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: 2px;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  z-index: 9999;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.pjax-toast.is-visible { opacity: 1; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 1000;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-pure);
  color: var(--color-text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  text-decoration: none;
  border: 1px solid var(--color-border-strong);
}

.skip-link:focus {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  width: auto;
  height: auto;
  overflow: visible;
}

.site-footer {
  text-align: center;
  padding: var(--space-24) var(--space-4) var(--space-8);
  max-width: 1200px;
  margin: 0 auto;
}

.site-footer-text {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
}

.site-footer-record {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
  margin-top: var(--space-1);
}

.site-footer-record a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.site-footer-record a:hover {
  color: var(--color-accent);
}