:where(.epi-shell,.epi-subheader){--epi-subheader-h:52px;--epi-sticky-top:calc(var(--epi-site-nav-h, 66px) + var(--epi-subheader-h));--epi-container-max:1440px;--epi-sidebar-w:272px;--epi-toc-w:232px;--epi-grid-gap:48px;--epi-measure:70ch;--epi-wide-max:960px;--epi-surface-canvas:var(--bg);--epi-surface-raised:var(--bg-soft);--epi-surface-hover:var(--panel-strong);--epi-surface-selected:var(--chip);--epi-line:var(--border);--epi-ink:var(--fg);--epi-ink-muted:var(--muted);--epi-ink-selected:var(--chip-fg);--epi-accent-bar:var(--accent);--epi-focus-ring:var(--accent);--epi-font-display:"Sora","Inter",ui-sans-serif,system-ui,sans-serif;--epi-font-body:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Thai",sans-serif;--epi-font-thai:"Noto Sans Thai","Inter",ui-sans-serif,system-ui,sans-serif;--epi-body-size:calc(clamp(1rem, 0.96rem + 0.2vw, 1.0625rem) * var(--epi-text-scale, 1));--epi-body-leading:1.7;--epi-body-leading-th:1.85;--epi-h1-size:clamp(1.875rem,1.5rem + 1.2vw,2.375rem);--epi-motion-fast:120ms;--epi-motion:180ms;--epi-ease:cubic-bezier(0.2,0,0,1)}@media (max-width:480px){:where(.epi-shell,.epi-subheader){--epi-subheader-h:48px}}@media (prefers-reduced-motion:reduce){:where(.epi-shell,.epi-subheader){--epi-motion-fast:0ms;--epi-motion:0ms}}html:not([data-uqlang=th]) :where(.epi-shell,.epi-subheader) .epi-l-th,html[data-uqlang=th] :where(.epi-shell,.epi-subheader) .epi-l-en{display:none}:where(.epi-shell,.epi-subheader) :lang(th){font-family:var(--epi-font-thai);letter-spacing:0;text-transform:none}.epi-subheader{position:-webkit-sticky;position:sticky;top:var(--epi-site-nav-h,66px);z-index:40;height:var(--epi-subheader-h);border-bottom:1px solid var(--epi-line);background:var(--epi-surface-canvas);color:var(--epi-ink);font-family:var(--epi-font-body)}.epi-subheader__inner{display:flex;align-items:center;gap:clamp(.75rem,2vw,1.5rem);box-sizing:border-box;width:100%;max-width:var(--epi-container-max);height:100%;margin:0 auto;padding:0 clamp(1rem,3vw,2rem)}.epi-subheader__title{flex:none;color:var(--epi-ink);font-family:var(--epi-font-display);font-size:.9rem;font-weight:700;text-decoration:none;white-space:nowrap}.epi-subheader__title :lang(th){font-family:var(--epi-font-thai)}.epi-subheader__actions,.epi-subheader__tabs{display:flex;align-items:center;height:100%;gap:.25rem}.epi-subheader__tabs{min-width:0;overflow-x:auto;scrollbar-width:none}.epi-subheader__tabs::-webkit-scrollbar{display:none}.epi-subheader__tab{display:inline-flex;align-items:center;flex:none;box-sizing:border-box;height:100%;padding:0 .7rem;border-bottom:2px solid transparent;color:var(--epi-ink-muted);font-size:.84rem;font-weight:600;text-decoration:none;white-space:nowrap;transition:background-color var(--epi-motion-fast) var(--epi-ease),color var(--epi-motion-fast) var(--epi-ease),border-color var(--epi-motion) var(--epi-ease)}.epi-subheader__tab:hover{background:var(--epi-surface-hover);color:var(--epi-ink)}.epi-subheader__tab--active,.epi-subheader__tab--active:hover{border-bottom-color:var(--epi-accent-bar);background:var(--epi-surface-selected);color:var(--epi-ink-selected)}.epi-subheader__actions{flex:none;margin-left:auto}.epi-subheader__slot{display:inline-flex;align-items:center}.epi-subheader :is(a,button,[tabindex]):focus-visible{outline:2px solid var(--epi-focus-ring);outline-offset:-2px;border-radius:4px}@media (max-width:767px){.epi-subheader__inner{gap:.35rem;padding:0 .75rem}.epi-subheader__title{display:none}.epi-subheader__tab{padding:0 .5rem;font-size:.78rem}}@media (prefers-reduced-motion:reduce){.epi-subheader__tab{transition:none}}