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var(--color-border);border-radius:var(--radius-md);box-shadow:0 8px 24px #1118271a;z-index:20}.lang-dropdown__option{display:flex;align-items:center;gap:.5rem;padding:.5rem .75rem;border-radius:calc(var(--radius-md) - .25rem);text-decoration:none;color:var(--color-text);font-size:.875rem;font-weight:600;white-space:nowrap;transition:background .12s ease}.lang-dropdown__option:hover{background:var(--color-surface)}.lang-dropdown__option[aria-current=page]{color:var(--color-accent);background:#4f46e512}.site-nav{display:flex;align-items:center;gap:var(--space-1);flex-wrap:wrap}.site-nav__link{padding:.45rem .75rem;border-radius:var(--radius-md);text-decoration:none;font-size:.9rem;font-weight:500;color:var(--color-muted);transition:color .14s ease,background .14s ease}.site-nav__link:hover{color:var(--color-text);background:var(--color-surface)}.site-nav__link[aria-current=page]{color:var(--color-accent);background:#4f46e512;font-weight:600}.site-nav__link:focus-visible{outline:3px solid 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var(--color-border)}.answer-guide__section{display:grid;gap:var(--space-2)}.answer-guide__title{margin:0;font-size:1rem;line-height:1.4}.answer-guide__formula,.answer-guide__explanation{margin:0;color:var(--color-muted);line-height:1.7}.answer-guide__formula strong{color:var(--color-text)}.answer-guide__list{margin:0;padding-left:1.25rem;display:grid;gap:var(--space-2);color:var(--color-muted);line-height:1.7}.table-scroll{overflow-x:auto;border:1px solid var(--color-border);border-radius:var(--radius-md)}.info-table{width:100%;min-width:28rem;border-collapse:collapse;background:var(--color-background)}.info-table th,.info-table td{padding:.9rem 1rem;border-bottom:1px solid var(--color-border);text-align:left;vertical-align:top;line-height:1.6}.info-table thead th{background:var(--color-surface);font-size:.875rem;font-weight:700}.info-table tbody tr:last-child td{border-bottom:0}.site-footer 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