/* Ashern Research
   Cool paper, deep navy ink, cobalt for links and actions, a single lime "signal"
   reserved for markers. Instrument Serif for display, IBM Plex Sans for text,
   IBM Plex Mono for numerals and labels. Rules and numerals carry the structure;
   no cards, no shadows. */

:root {
  --paper: #f4f5f7;
  --paper-2: #e9ebef;
  --ink: #0e1526;
  --ink-2: #2b3445;
  --muted: #5d6675;
  --rule: #cfd4dc;
  --rule-2: #dde1e7;
  --cobalt: #1e4bd1;
  --cobalt-ink: #163a9f;
  --signal: #b5d86a;
  --navy: #0e1526;
  --navy-2: #16203a;
  --on-navy: #eef1f6;
  --on-navy-muted: #9aa6bb;
  --focus: #1e4bd1;

  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 1200px;
  --gutter: clamp(18px, 4vw, 44px);
  --measure: 66ch;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--cobalt-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--cobalt); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
img { max-width: 100%; height: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.hp { position: absolute; left: -9999px; }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.05; letter-spacing: -0.01em; margin: 0 0 0.45em; color: var(--ink); }
h1 { font-size: clamp(40px, 6vw, 72px); }
h2 { font-size: clamp(30px, 3.6vw, 44px); }
h3 { font-size: 26px; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
.lede { font-size: 20px; line-height: 1.5; color: var(--ink-2); max-width: var(--measure); }
.eyebrow { font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em; color: var(--muted); margin: 0 0 14px; }
.eyebrow::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--signal); margin-right: 10px; vertical-align: 1px; }
.small { font-size: 14.5px; color: var(--muted); }
.num-inline { font-family: var(--mono); color: var(--cobalt); }

.btn { display: inline-block; font: 600 15.5px/1 var(--sans); background: var(--cobalt); color: #fff; padding: 13px 20px; border-radius: 2px; text-decoration: none; border: 1px solid var(--cobalt); cursor: pointer; }
.btn:hover { background: var(--cobalt-ink); color: #fff; }
.btn-light { background: var(--on-navy); color: var(--navy); border-color: var(--on-navy); }
.btn-light:hover { background: #fff; color: var(--navy); }
.link-arrow { font-weight: 600; text-decoration: none; }
.link-arrow::after { content: "\2192"; margin-left: 8px; transition: margin 0.15s; }
.link-arrow:hover::after { margin-left: 12px; }
.hero .link-arrow { color: var(--on-navy); }

/* Header */
.site-head { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--rule); padding-top: env(safe-area-inset-top, 0px); }
.site-head-inner { display: flex; align-items: center; gap: 36px; min-height: 66px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 25px; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.mark { width: 12px; height: 12px; background: var(--cobalt); display: inline-block; position: relative; }
.mark::after { content: ""; position: absolute; left: 4px; top: 4px; width: 8px; height: 8px; background: var(--signal); }
.site-nav { display: flex; gap: 26px; }
.site-nav a { color: var(--ink-2); text-decoration: none; font-weight: 500; padding: 22px 0; border-bottom: 2px solid transparent; }
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--cobalt); }
.btn-head { margin-left: auto; padding: 10px 16px; }
.nav-toggle { display: none; margin-left: auto; font: 600 15px var(--sans); background: none; border: 1px solid var(--rule); color: var(--ink); padding: 8px 14px; border-radius: 2px; cursor: pointer; }
.mobile-nav { display: flex; flex-direction: column; border-top: 1px solid var(--rule); background: var(--paper); }
.mobile-nav[hidden] { display: none; }
.mobile-nav a { padding: 14px var(--gutter); text-decoration: none; color: var(--ink); font-weight: 500; border-bottom: 1px solid var(--rule-2); }
@media (max-width: 820px) { .site-nav, .btn-head { display: none; } .nav-toggle { display: inline-block; } .site-head-inner { min-height: 58px; } .wordmark { font-size: 22px; } }

/* Hero */
.hero { background: var(--navy); color: var(--on-navy); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 40px; align-items: center; padding-top: clamp(56px, 9vw, 120px); padding-bottom: clamp(40px, 6vw, 80px); }
.hero .eyebrow { color: var(--on-navy-muted); }
.hero h1 { color: #fff; font-size: clamp(44px, 6.4vw, 84px); max-width: 14ch; }
.hero .lede { color: var(--on-navy-muted); font-size: 20px; max-width: 52ch; }
.hero-actions { display: flex; gap: 26px; align-items: center; flex-wrap: wrap; margin-top: 28px; }
.hero-art { color: var(--on-navy); display: flex; justify-content: center; }
.helix { width: 100%; max-width: 460px; height: auto; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,0.14); padding-top: 24px; padding-bottom: 40px; gap: 24px; }
.stats strong { display: block; font-family: var(--serif); font-size: 44px; line-height: 1; color: #fff; font-weight: 400; }
.stats span { display: block; font-family: var(--mono); font-size: 13px; color: var(--on-navy-muted); margin-top: 8px; }
.stats-inline { border-top: 1px solid var(--rule); padding-top: 28px; }
.stats-inline strong { color: var(--ink); }
.stats-inline span { color: var(--muted); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .hero-art { order: -1; } .helix { max-width: 320px; } .stats { grid-template-columns: 1fr 1fr; } }

/* Sections */
.section { padding-top: clamp(48px, 7vw, 96px); padding-bottom: clamp(24px, 4vw, 48px); }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; flex-wrap: wrap; border-bottom: 1px solid var(--ink); padding-bottom: 14px; margin-bottom: 8px; }
.section-head h2 { margin: 0; }
.section-head p { margin: 0; color: var(--muted); }
.page-head { padding-top: clamp(44px, 6vw, 88px); padding-bottom: 8px; }
.page-head h1 { max-width: 18ch; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.two-col h2 { font-size: 30px; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; gap: 24px; } }

/* Focus grid */
.focus-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; border-left: 1px solid var(--rule); border-top: 1px solid var(--rule); }
.focus-grid li { border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.focus-grid a { display: grid; grid-template-columns: 64px 1fr; grid-template-areas: "num name" "num blurb"; column-gap: 12px; padding: 30px 26px 30px 22px; text-decoration: none; color: var(--ink); min-height: 190px; transition: background 0.15s; }
.focus-grid a:hover { background: #fff; }
.focus-grid .num { grid-area: num; font-family: var(--mono); font-size: 15px; color: var(--cobalt); padding-top: 6px; }
.focus-grid .name { grid-area: name; font-family: var(--serif); font-size: 32px; line-height: 1.05; margin-bottom: 10px; }
.focus-grid .blurb { grid-area: blurb; color: var(--ink-2); font-size: 16px; max-width: 46ch; }
.focus-grid a:hover .name { color: var(--cobalt-ink); }
.focus-grid-lg .name { font-size: 38px; }
@media (max-width: 760px) { .focus-grid { grid-template-columns: 1fr; } .focus-grid a { min-height: 0; padding: 22px 18px; } .focus-grid .name { font-size: 28px; } }

/* Band */
.band { background: var(--paper-2); margin-top: clamp(32px, 5vw, 64px); }
.band-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; padding-top: clamp(48px, 7vw, 96px); padding-bottom: clamp(48px, 7vw, 96px); }
.band h2 { max-width: 14ch; }
.band-copy p { font-size: 18px; max-width: var(--measure); }
@media (max-width: 820px) { .band-grid { grid-template-columns: 1fr; gap: 16px; } }

/* Process */
.process { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: p; position: relative; }
.process::before { content: ""; position: absolute; left: 0; right: 0; top: 11px; border-top: 1px solid var(--rule); }
.process li { position: relative; padding-top: 34px; }
.process .step { position: absolute; top: 0; left: 0; font-family: var(--mono); font-size: 13px; color: var(--cobalt); background: var(--paper); padding-right: 10px; line-height: 22px; }
.process .step::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--signal); margin-right: 8px; vertical-align: 1px; }
.process h3 { font-size: 24px; margin-bottom: 8px; }
.process p { color: var(--ink-2); font-size: 16px; margin: 0; }
@media (max-width: 900px) { .process { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .process { grid-template-columns: 1fr; gap: 22px; } .process::before { display: none; } .process li { padding-top: 30px; } }

/* Posts */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { display: grid; grid-template-columns: 170px 1fr; grid-template-areas: "date title" "date text"; column-gap: 28px; padding: 24px 0; border-bottom: 1px solid var(--rule-2); }
.post-list .date { grid-area: date; font-family: var(--mono); font-size: 13.5px; color: var(--muted); padding-top: 6px; }
.post-list li > a { grid-area: title; font-family: var(--serif); font-size: 28px; line-height: 1.15; color: var(--ink); text-decoration: none; }
.post-list li > a:hover { color: var(--cobalt-ink); text-decoration: underline; }
.post-list p { grid-area: text; margin: 8px 0 0; color: var(--ink-2); max-width: var(--measure); }
.post-list-lg li > a { font-size: 34px; }
@media (max-width: 640px) { .post-list li { grid-template-columns: 1fr; grid-template-areas: "date" "title" "text"; } .post-list li > a { font-size: 25px; } }

/* Quote */
.quote { padding-top: clamp(40px, 6vw, 80px); }
.quote blockquote { margin: 0; border-left: 3px solid var(--signal); padding-left: 24px; max-width: 60ch; }
.quote p { font-family: var(--serif); font-size: clamp(24px, 3vw, 34px); line-height: 1.25; margin-bottom: 12px; }
.quote footer { font-family: var(--mono); font-size: 13.5px; color: var(--muted); }

/* FAQ */
.faq details { border-bottom: 1px solid var(--rule-2); }
.faq summary { cursor: pointer; list-style: none; font-family: var(--serif); font-size: 24px; padding: 18px 40px 18px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font-size: 28px; color: var(--cobalt); font-family: var(--sans); }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { margin: 0 0 20px; color: var(--ink-2); max-width: var(--measure); }

/* CTA */
.cta { background: var(--navy); color: var(--on-navy); margin-top: clamp(48px, 7vw, 96px); }
.cta-inner { padding-top: clamp(48px, 7vw, 96px); padding-bottom: clamp(48px, 7vw, 96px); max-width: 780px; margin: 0; }
.cta h2 { color: #fff; }
.cta p { color: var(--on-navy-muted); font-size: 19px; margin-bottom: 24px; }

/* Article layouts */
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; padding-top: 32px; padding-bottom: 64px; align-items: start; }
.prose { max-width: var(--measure); font-size: 18px; }
.prose p { margin-bottom: 1.2em; }
.prose h2 { font-size: 32px; margin-top: 1.6em; }
.prose h3 { font-size: 24px; margin-top: 1.4em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: 0.4em; }
.prose p:first-child { font-size: 20px; }
.side { position: sticky; top: 84px; font-size: 15.5px; }
.side h2 { font-family: var(--sans); font-size: 14px; font-weight: 600; letter-spacing: 0.02em; color: var(--muted); margin: 0 0 12px; }
.side h2 + p { margin-bottom: 22px; }
.side-list { list-style: none; margin: 0 0 32px; padding: 0; border-top: 1px solid var(--rule); }
.side-list li { padding: 11px 0; border-bottom: 1px solid var(--rule-2); display: flex; justify-content: space-between; gap: 12px; }
.side-list a { text-decoration: none; color: var(--ink); font-weight: 500; }
.side-list a:hover { color: var(--cobalt-ink); }
.side-list span { font-family: var(--mono); font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.side-cta { background: var(--paper-2); padding: 20px; }
.side-cta h2 { font-family: var(--serif); font-size: 22px; letter-spacing: 0; color: var(--ink); text-transform: none; }
.side-cta p { color: var(--ink-2); margin-bottom: 16px; }
@media (max-width: 860px) { .article-grid { grid-template-columns: 1fr; gap: 32px; } .side { position: static; } }

/* Contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 56px; padding-top: 32px; padding-bottom: 64px; align-items: start; }
.contact-form { display: grid; gap: 16px; max-width: 620px; }
.contact-form label { font-weight: 600; font-size: 14.5px; color: var(--ink-2); }
input[type="text"], input[type="email"], textarea { display: block; width: 100%; margin-top: 6px; font: inherit; color: var(--ink); background: #fff; border: 1px solid var(--rule); border-radius: 2px; padding: 11px 12px; }
input:focus, textarea:focus { border-color: var(--cobalt); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--cobalt) 18%, transparent); }
.contact-form .btn { justify-self: start; }
.notice { border: 1px solid var(--rule); background: var(--paper-2); padding: 14px 16px; margin-bottom: 20px; }
.notice p, .notice ul { margin: 0; }
.notice-ok { border-color: var(--signal); }
.notice-err { border-color: #c0392b; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 28px; } }

/* Footer */
.site-foot { background: var(--paper-2); border-top: 1px solid var(--rule); margin-top: 0; font-size: 15px; }
.cta + .site-foot { border-top: 0; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 32px; padding-top: 44px; padding-bottom: 24px; }
.foot-grid h2 { font-family: var(--sans); font-size: 14px; font-weight: 600; color: var(--ink); margin: 0 0 10px; }
.foot-grid a, .foot-grid span { display: block; color: var(--ink-2); text-decoration: none; padding: 3px 0; }
.foot-grid a:hover { color: var(--cobalt-ink); text-decoration: underline; }
.foot-about p { color: var(--muted); max-width: 40ch; margin-top: 12px; }
.foot-legal { padding-top: 8px; padding-bottom: 34px; color: var(--muted); font-size: 14px; }
@media (max-width: 860px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-about { grid-column: 1 / -1; } }
@media (max-width: 460px) { .foot-grid { grid-template-columns: 1fr; gap: 22px; } }