:root{--bg: #ffffff;--surface: #f4f5f7;--surface-dark: #e5e7eb;--surface-darker: #d1d5db;--border: #e5e7eb;--text: #111827;--text-secondary: #374151;--text-placeholder: #6b7280;--accent: #2357A4;--track: #ffffff;color-scheme:light;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box;margin:0}html{height:100%}body{background:var(--bg);color:var(--text)}h1,h2,h3,h4,h5,h6{font-family:Google Sans Flex,system-ui,sans-serif;font-weight:600}.page{display:flex;flex-direction:column;min-height:100dvh}.app{display:flex;flex-direction:column;flex:1;width:100%;max-width:1024px;margin-inline:auto}.top-nav{border-bottom:1px solid var(--border);background:var(--bg);max-height:4rem}.top-nav__inner{min-height:4rem;display:grid;grid-template-columns:1fr auto 1fr;align-items:stretch;gap:1rem;width:100%;max-width:1024px;margin-inline:auto;padding-inline:1rem}.top-nav__logo{grid-column:1;display:inline-flex;align-items:center;justify-self:start}.top-nav__logo 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sup{font-size:.875rem}.spec-unit{color:var(--text-placeholder)}.spec-source{text-decoration:none;text-decoration-color:var(--text-placeholder);text-underline-offset:3px;cursor:help}.spec-source sup{font-size:.875em;margin-left:1px}.spec-scroll{overflow-x:auto}.spec{width:100%;border-collapse:collapse;font-size:.875rem}.spec th,.spec td{padding:.45rem .6rem;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}.spec thead th{background:var(--surface);color:var(--accent);font-weight:600}.spec tbody th{color:var(--text-secondary);font-weight:500}@media(max-width:850px){.optic-cards{grid-template-columns:repeat(2,1fr)}.top-nav__menu{display:none}.top-nav__hamburger{display:inline-flex}.spec-scroll{margin-left:-1rem;margin-right:-1rem}.spec th:first-child,.spec td:first-child{padding-left:1rem}.spec-footnote{margin-left:0}}@media(max-width:640px){.optic-cards{grid-template-columns:1fr}.overlay__slide-caption{font-size:10px}.modal-backdrop{padding:0;align-items:flex-end}.modal{width:100%;height:calc(100dvh - 1.5rem);border-radius:12px 12px 0 0;padding-bottom:.75rem;animation:modal-slide-up .28s cubic-bezier(.16,1,.3,1)}.modal-backdrop.is-closing .modal{animation:modal-slide-down .24s ease-in forwards}.modal__actions{padding-top:.75rem}.overlay__header .seg,.overlay__header .seg button{flex:1}}