* { box-sizing: border-box; }
:root { --ink: #171713; --paper: #f4efe4; --card: #fffdf7; --acid: #d8ff4f; --signal: #d85e3f; --muted: #666056; --line: #cbc2b2; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.58; }
a { color: inherit; }
a:focus-visible { outline: 4px solid var(--signal); outline-offset: 4px; }
.wrap { max-width: 1120px; margin: auto; padding: 42px 24px 96px; }
.cover { padding: clamp(28px, 6vw, 68px); background: var(--ink); color: #fff; border-bottom: 10px solid var(--acid); }
.cover-inner { max-width: 1120px; margin: auto; }
.status { display: inline-block; padding: 8px 12px; background: var(--acid); color: var(--ink); font-size: 11px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.sample-disclosure { margin: 18px 0 0; max-width: 850px; padding: 14px 16px; border-left: 5px solid var(--signal); background: #2b2b27; color: #eeeae0; }
.sample-disclosure a { color: var(--acid); font-weight: 800; text-underline-offset: 3px; }
h1, h2, h3 { font-family: Georgia, serif; font-weight: 400; }
h1 { margin: 28px 0 18px; font-size: clamp(48px, 8vw, 92px); line-height: .9; letter-spacing: -.035em; }
h2 { margin: 0 0 18px; font-size: clamp(34px, 5vw, 56px); line-height: .98; }
h3 { margin: 0 0 9px; font-size: 25px; line-height: 1.1; }
.cover-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; color: #d5d1c8; font-weight: 700; }
.cover-meta span { white-space: nowrap; }
.toc { margin: 0 0 54px; padding: 20px; border: 1px solid var(--line); background: var(--card); }
.toc strong { display: block; margin-bottom: 10px; }
.toc ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px 22px; margin: 0; padding-left: 21px; }
.toc a { text-underline-offset: 3px; }
.section { margin: 0 0 64px; scroll-margin-top: 24px; }
.section-kicker { margin: 0 0 7px; color: var(--signal); font-size: 11px; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
.lead { max-width: 780px; font-size: 19px; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.card { padding: 24px; border: 1px solid var(--line); background: var(--card); }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.label { margin: 0 0 6px; color: var(--muted); font-family: inherit; font-size: 11px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.big-line { margin: 0 0 18px; font-family: Georgia, serif; font-size: clamp(26px, 4vw, 42px); line-height: 1.04; }
.concept { display: block; width: 100%; border: 1px solid var(--ink); background: #fff; box-shadow: 10px 10px 0 var(--signal); }
.caption { margin: 16px 0 0; color: var(--muted); font-size: 13px; }
.assumption { border-top: 5px solid var(--acid); }
.unknown { border-top: 5px solid var(--signal); }
.surface { display: grid; grid-template-columns: 135px 1fr; gap: 20px; margin-bottom: 14px; padding: 22px; border: 1px solid var(--line); background: var(--card); }
.dimension { display: grid; place-items: center; min-height: 118px; padding: 12px; background: var(--ink); color: #fff; text-align: center; font-size: 13px; font-weight: 800; }
.dimension strong { display: block; color: var(--acid); font-family: Georgia, serif; font-size: 27px; font-weight: 400; }
.surface dl { display: grid; grid-template-columns: 100px 1fr; gap: 6px 12px; margin: 16px 0 0; }
.surface dt { color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.surface dd { margin: 0; }
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; counter-reset: step; }
.flow div { position: relative; min-height: 130px; padding: 42px 16px 16px; border: 1px solid var(--ink); background: var(--card); }
.flow div::before { counter-increment: step; content: counter(step, decimal-leading-zero); position: absolute; top: 11px; left: 14px; color: var(--signal); font-weight: 900; }
.question { padding: 26px; border-left: 8px solid var(--acid); background: var(--ink); color: #fff; }
.question h3 { color: var(--acid); }
.question ul { margin-bottom: 0; }
.talk-track { margin-top: 18px; padding: 24px; border: 1px solid var(--ink); background: var(--card); }
.talk-track > p:last-child { margin-bottom: 0; color: var(--muted); }
.talk-track ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0; padding: 0; list-style: none; }
.talk-track li { min-height: 150px; padding: 18px; background: var(--ink); color: #fff; }
.talk-track li span { display: block; margin-bottom: 10px; color: var(--acid); font-size: 11px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.talk-track li p { margin: 0; }
.email { padding: 24px; border: 1px solid var(--line); background: #fff; }
.email pre { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; }
.gate { padding: 22px; border-left: 7px solid var(--signal); background: var(--card); }
.files { display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; padding: 0; list-style: none; }
.files a { display: block; min-height: 48px; padding: 13px 15px; border: 1px solid var(--ink); background: var(--card); font-weight: 800; text-decoration: none; }
.files a:hover { background: var(--acid); }
.footer-note { margin-top: 55px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.sample-return { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; margin-top: 64px; padding: clamp(25px, 5vw, 45px); background: var(--ink); color: #fff; }
.sample-return h2 { margin-bottom: 10px; }
.sample-return p { max-width: 680px; color: #d5d1c8; }
.sample-return .label { color: var(--acid); }
.sample-return a { display: inline-flex; align-items: center; min-height: 50px; padding: 13px 17px; background: var(--acid); color: var(--ink); font-weight: 900; text-decoration: none; box-shadow: 6px 6px 0 var(--signal); white-space: nowrap; }
@media (max-width: 820px) { .toc ol, .grid.three, .flow { grid-template-columns: 1fr 1fr; } .talk-track ol { grid-template-columns: 1fr; } .talk-track li { min-height: 0; } }
@media (max-width: 620px) { .grid, .grid.three, .toc ol, .flow, .files, .sample-return { grid-template-columns: 1fr; } .surface { grid-template-columns: 1fr; } .sample-return { align-items: start; } .sample-return a { white-space: normal; } .wrap { padding-inline: 18px; } }
@media print { body { background: #fff; } .cover { break-after: page; } .section { break-inside: avoid; } .toc { display: none; } .concept { box-shadow: none; } a { text-decoration: none; } }