/* writeup.css — case-study pages + 404, matching the atlas design system.
   The @font-face block and the token block below are copied verbatim from
   atlas.css so the two can't drift. These pages carry no JS at all. */
@font-face{font-family:'Chivo';font-style:normal;font-weight:100 900;font-display:swap;src:url(fonts/chivo-var.woff2) format('woff2')}
@font-face{font-family:'Newsreader';font-style:normal;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-var.woff2) format('woff2')}
@font-face{font-family:'Newsreader';font-style:italic;font-weight:200 800;font-display:swap;src:url(fonts/newsreader-italic-var.woff2) format('woff2')}

* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #12141a;
  --paper: #171a22;
  --ink: #e8e9ee;
  --dim: #a9aebc;
  --rule: rgba(232,233,238,.15);
  --navy: #9db6d4;
  --red: #bf8a92;
  --under: rgba(157,182,212,.42);
  --mono: 'SF Mono', 'Fira Code', Consolas, monospace;
  --sans: 'Chivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --serif: 'Newsreader', Georgia, 'Times New Roman', serif;
}
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: var(--navy); color: var(--bg); }

a:focus-visible { outline: 2px solid var(--navy); outline-offset: 3px; }

/* ---- nav: the same sticky rule-under bar as the homepage ---- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 6;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 0 clamp(16px,5vw,56px); height: 54px;
  background: var(--bg); border-bottom: 2px solid var(--ink);
}
.nav .brand { color: var(--dim); text-decoration: none; font-size: 13px; letter-spacing: .06em; white-space: nowrap; }
.nav .brand b { font-family: var(--serif); font-weight: 800; font-size: 17px; letter-spacing: -.02em; color: var(--ink); }
.nav .links { display: flex; gap: clamp(12px,3vw,26px); }
.nav .links a {
  color: var(--dim); text-decoration: none; font-size: 13px; letter-spacing: .06em;
  padding: 4px 0; border-bottom: 2px solid transparent; transition: 0.15s;
}
.nav .links a:hover, .nav .links a:focus-visible { color: var(--ink); border-bottom-color: var(--navy); }

/* ---- article ---- */
main.wu { max-width: 760px; margin: 0 auto; padding: 110px 26px 70px; line-height: 1.6; }
.wu-back {
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--navy); text-decoration: none; border-bottom: 1px solid var(--under); padding-bottom: 2px;
}
.wu-back:hover { border-bottom-color: var(--navy); }
.wu-exhibit {
  font-size: 11px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--dim); margin-top: 30px;
}
.wu-exhibit::before { content: "◆ "; color: var(--red); }
main.wu h1 {
  font-family: var(--serif); font-size: clamp(1.9rem, 6vw, 3rem); font-weight: 700;
  letter-spacing: -.03em; line-height: 1.06; margin-top: 12px; color: var(--ink);
}
.wu-meta { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--dim); margin-top: 16px; }
.wu-meta span { color: var(--red); }
main.wu h2 {
  font-family: var(--serif); font-size: clamp(1.25rem, 3vw, 1.6rem); font-weight: 700;
  letter-spacing: -.02em; color: var(--ink); margin: 2.4em 0 0.7em;
}
main.wu h2::before { content: "◆"; color: var(--red); font-size: 0.55em; vertical-align: 0.28em; margin-right: 0.55em; }
main.wu p { color: var(--dim); line-height: 1.72; margin: 0.9em 0; }
main.wu strong { color: var(--ink); font-weight: 600; }
main.wu a { color: var(--navy); text-decoration: none; border-bottom: 1px solid var(--under); }
main.wu a:hover { border-bottom-color: var(--navy); }
main.wu ul { list-style: none; margin: 0.9em 0; }
main.wu ul li { color: var(--dim); line-height: 1.7; margin: 0.7em 0; padding-left: 18px; position: relative; }
main.wu ul li::before { content: "◆"; color: var(--red); font-size: 7px; position: absolute; left: 0; top: 0.62em; }
code {
  font-family: var(--mono); font-size: 0.86em; color: var(--navy);
  border: 1px solid var(--rule); background: var(--paper); padding: 1px 6px;
}
pre {
  font-family: var(--mono); font-size: 0.8rem; line-height: 1.75; color: var(--ink);
  border: 1px solid var(--rule); background: var(--paper);
  padding: 16px 20px; margin: 1.1em 0; overflow-x: auto;
}
pre code { border: 0; background: none; padding: 0; color: inherit; font-size: inherit; }
.note {
  background: var(--paper); border: 1px solid var(--rule); border-left: 3px solid var(--red);
  padding: 14px 18px; margin: 24px 0; color: var(--dim); font-size: 0.94rem; line-height: 1.65;
}

/* disclosure timeline */
.wu-tl { list-style: none; margin: 0.9em 0; }
.wu-tl li { display: flex; gap: 14px; margin: 0.7em 0 !important; padding-left: 0 !important; }
.wu-tl li::before { content: none !important; }
.wu-tl .tld {
  font-size: 10px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--navy); background: var(--paper); border: 1px solid var(--rule); padding: 4px 8px;
  align-self: flex-start; flex: 0 0 9ch; text-align: center; margin-top: 2px;
}
.wu-tl .tlt { color: var(--dim); line-height: 1.65; }

.wu-next { margin-top: 56px; border-top: 1.5px solid var(--rule); padding-top: 20px; }
.wu-next p { font-size: 0.92rem; letter-spacing: .01em; color: var(--dim); }

/* ---- footer ---- */
footer { border-top: 1.5px solid var(--rule); margin-top: 30px; }
footer .wrap {
  max-width: 760px; margin: 0 auto; padding: 26px;
  font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--dim); line-height: 2;
}
footer a { color: var(--navy); text-decoration: none; border-bottom: 1px solid var(--under); }
footer a:hover { border-bottom-color: var(--navy); }

/* ---- 404 terminal: mirrors the homepage .spec panel ---- */
.err-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 26px; }
.err-wrap .term {
  font-family: var(--mono); font-size: 0.86rem; line-height: 2.1;
  border: 1px solid var(--rule); background: var(--paper);
  padding: 22px 26px; max-width: 560px; width: 100%;
}
.term-prompt { color: var(--dim); margin-bottom: 8px; }
.term-prompt b { color: var(--navy); font-weight: 700; }
.term-row { display: flex; gap: 14px; }
.term-k { color: var(--dim); flex: 0 0 7ch; min-width: 0; }
.term-v { color: var(--ink); min-width: 0; overflow-wrap: anywhere; }
.term-v a { color: var(--navy); text-decoration: none; border-bottom: 1px solid var(--under); }
.term-v a:hover { border-bottom-color: var(--navy); }

@media (max-width: 720px) {
  .nav { padding: 0 16px; }
  .nav .brand .host { display: none; }
  .nav .links { gap: 14px; }
  .nav .links a { font-size: 12px; letter-spacing: .04em; }
  main.wu { padding: 92px 20px 50px; }
  pre { font-size: 0.72rem; padding: 12px 14px; }
  .wu-tl li { flex-direction: column; gap: 6px; }
  .wu-tl .tld { align-self: flex-start; flex: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}