/* The Validation page: the guide's layout and tables, with numbers set in
   tabular figures so columns of results line up digit for digit. */
.validation-page .guide-table table { font-variant-numeric: tabular-nums; }
.validation-page .guide-table caption { caption-side: top; text-align: left; padding: 12px 16px 4px; font-size: 12px; font-weight: 600; letter-spacing: .4px; color: var(--dim); }
.validation-page .guide-table td { white-space: nowrap; }
.validation-page .guide-table td:first-child { white-space: normal; }
.val-note { color: var(--faint); font-size: 11.5px; }
.val-method { font-size: 13.5px; color: var(--dim); }
.val-method strong { color: var(--text); font-weight: 500; }
.val-meta { font-size: 12.5px; color: var(--faint); }
.val-meta code { font-size: 11.5px; }
.val-refs { padding-left: 0; list-style: none; display: grid; gap: 12px; font-size: 13.5px; }
.val-refs li { color: var(--dim); line-height: 1.6; }
.val-ref-n { color: var(--text); margin-right: 6px; font-variant-numeric: tabular-nums; }
.val-refs li:target { background: var(--accent-wash); border-radius: 6px; }
/* The adsorption comparison has nine columns; set closer so it fits a laptop
   without scrolling, and scrolls on a phone rather than wrapping numbers. */
#adsorption .guide-table th, #adsorption .guide-table td { padding: 11px 10px; font-size: 12.5px; }
#adsorption .guide-table th:first-child, #adsorption .guide-table td:first-child { padding-left: 16px; }

/* Keep the report in the site's theme, with a quieter editorial hierarchy. */
.validation-page main { min-width: 0; }
.validation-page .guide-hero { position: relative; padding-bottom: 34px; }
.validation-page .guide-hero h1 { font-size: clamp(40px, 5.2vw, 66px); letter-spacing: -2.6px; }
.validation-page .guide-hero h1 span { color: var(--doc-link); }
.validation-page .guide-hero > p { max-width: 690px; line-height: 1.8; }
.validation-page .guide-actions .btn { padding: 0 17px; gap: 15px; }
.val-principles { display: flex; flex-wrap: wrap; gap: 10px 24px; color: var(--dim); font-size: 11px; }
.val-principles span::before { content: ''; display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--doc-link); margin: 0 8px 2px 0; }
.validation-page .guide-cards article { border-top: 2px solid var(--doc-link); padding: 24px; }
.validation-page .guide-cards h3 { margin: 12px 0; line-height: 1.35; }
.val-glossary { margin: 28px 0 0; }
.val-glossary > div { display: grid; grid-template-columns: 165px 1fr; gap: 24px; padding: 18px 0; border-top: 1px solid var(--line); }
.val-glossary dt { color: var(--text); font-size: 13px; font-weight: 600; }
.val-glossary dd { color: var(--dim); font-size: 13px; margin: 0; }
.val-section-number { color: var(--doc-link); letter-spacing: 1.5px; font-size: 10px; font-weight: 600; }
.validation-page .guide-table { background: var(--shell); box-shadow: 0 4px 20px #00000006; }
.validation-page .guide-table caption { padding: 16px; }
.validation-page .guide-table td { padding-top: 16px; padding-bottom: 16px; }
.validation-page .guide-table tbody tr:nth-child(even) { background: var(--glass); }
.validation-page .guide-table tbody tr:hover { background: var(--raised); }
.val-method { border-left: 2px solid var(--doc-link); padding: 3px 20px; margin: 26px 0 14px; }
.validation-page .val-method h3 { font-size: 13px; margin: 0 0 8px; font-weight: 600; color: var(--text); }
.validation-page .val-method p { margin: 0; }
.validation-page .val-reproduce { background: var(--shell); }
.val-reproduce code { display: block; white-space: normal; padding: 12px; border-radius: 6px; }
.val-refs li { border-bottom: 1px solid var(--line); padding: 12px 0 20px; overflow-wrap: anywhere; }
.validation-page a:focus-visible, .validation-page summary:focus-visible { outline: 2px solid var(--doc-link); outline-offset: 4px; }
@media (max-width: 520px) {
  .validation-page .guide-header { flex-wrap: wrap; }
  .validation-page .guide-header nav { flex-wrap: wrap; }
  .validation-page .guide-hero h1 { letter-spacing: -1.6px; }
  .val-glossary > div { grid-template-columns: 1fr; gap: 6px; }
  .val-principles { gap: 8px 16px; }
}