/* SpecAgent project page. Layout and palette follow the lab's Mosaic page. */
:root {
  --bg: #faf9f5;
  --ink: #25231f;
  --muted: #756f65;
  --accent: #c66a49;
  --accent-soft: #f7ebe3;
  --sage: #527a6b;
  --sage-soft: #eaf0eb;
  --line: #e3dfd5;
  --paper: #fffefa;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --serif: 'Iowan Old Style', 'Palatino Linotype', 'Book Antiqua', Georgia, serif;
  --reading-width: 760px;
  --figure-width: 1000px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; color: var(--ink); background: var(--bg); font: 18px/1.8 var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: #ead3c1; }
a { color: inherit; text-decoration-color: var(--line); text-underline-offset: 4px; }
a:hover { color: var(--accent); }
a:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
img { display: block; max-width: 100%; height: auto; }
p { margin: 0 0 1.25em; }
strong { font-weight: 620; }
em { font-style: italic; }
.prose { width: min(var(--reading-width), calc(100% - 40px)); margin-inline: auto; }

/* header */
.skip-link { position: fixed; top: 8px; left: 12px; z-index: 20; transform: translateY(-160%); background: var(--paper); padding: 8px 16px; }
.skip-link:focus { transform: none; }
.site-header { height: 72px; padding-inline: clamp(20px, 5vw, 80px); display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font: 600 20px var(--serif); text-decoration: none; }
.wordmark svg { width: 26px; height: 26px; flex: none; }
.site-header nav { display: flex; gap: 27px; font-size: 13px; }
.site-header nav a { text-decoration: none; color: var(--muted); }
.site-header nav a:hover { color: var(--accent); }

/* hero */
.hero { width: min(1200px, calc(100% - 40px)); margin-inline: auto; text-align: center; padding-top: 76px; padding-bottom: 40px; }
.eyebrow, .section-kicker { font-size: 11px; line-height: 1.5; font-weight: 650; letter-spacing: .15em; text-transform: uppercase; color: var(--accent); }
.eyebrow { margin-bottom: 19px; }
h1 { font: 500 clamp(32px, 4.1vw, 52px)/1.2 var(--serif); letter-spacing: -.035em; margin: 0 auto 22px; max-width: 980px; text-wrap: balance; }
.paper-credits { max-width: var(--reading-width); margin: 0 auto 22px; }
.authors { font-size: 14px; line-height: 1.7; margin-bottom: 5px; }
.authors sup, .affiliations sup { font-size: 10px; color: var(--muted); margin-left: 1px; }
.affiliations { color: var(--muted); font-size: 13px; line-height: 1.7; margin-bottom: 0; }
.resource-links { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.resource-links a { display: inline-flex; gap: 7px; align-items: center; border: 1px solid #cfc8bd; border-radius: 7px; padding: 7px 13px; font-size: 12px; line-height: 1.6; text-decoration: none; background: #ffffff60; }
.resource-links a[aria-disabled="true"] { opacity: .6; cursor: default; }
.resource-links a:not([aria-disabled="true"]):hover { border-color: var(--accent); background: var(--accent-soft); }
.resource-links svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.35; stroke-linecap: round; stroke-linejoin: round; }
.hero-summary { max-width: var(--reading-width); font: 400 28px/1.5 var(--serif); letter-spacing: -.02em; margin: 42px auto 0; }

/* sections */
.article-section { padding: 43px 0 36px; }
.section-kicker { margin-bottom: 14px; }
h2 { margin: 0 0 25px; font: 500 clamp(30px, 4vw, 41px)/1.22 var(--serif); letter-spacing: -.035em; text-wrap: balance; }
h3 { font: 600 23px/1.4 var(--serif); letter-spacing: -.015em; margin: 42px 0 16px; }
blockquote { margin: 34px 0; padding: 4px 0 4px 24px; border-left: 2px solid var(--accent); font: 400 24px/1.55 var(--serif); letter-spacing: -.015em; color: var(--ink); }

/* figures */
.figure-wide { width: min(var(--figure-width), calc(100% - 40px)); margin: 35px auto; }
.paper-figure { border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.figure-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 24px 0; }
.figure-label { font-size: 12px; font-weight: 600; line-height: 1.5; }
.figure-note { font-size: 11px; color: var(--muted); line-height: 1.5; text-align: right; }
.paper-image { background: #fff; margin: 16px 20px 6px; padding: 12px; border-radius: 6px; }
.paper-image img { width: 100%; }
.demo-image { margin: 0; padding: 0; overflow: hidden; border-radius: 11px 11px 0 0; background: #fff; }
.demo-image img { width: 100%; }
figcaption { padding: 4px 24px 18px; font-size: 13px; line-height: 1.7; color: var(--muted); }
figcaption .caption-number { font-weight: 650; color: #555047; }

/* method steps */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin: 30px auto 0; }
.step { padding: 20px 20px 18px; background: var(--paper); border: 1px solid var(--line); border-top: 3px solid var(--line); border-radius: 10px; }
.step[data-role="weak"] { border-top-color: var(--sage); }
.step[data-role="strong"] { border-top-color: var(--accent); }
.step .step-who { display: block; font-size: 11px; font-weight: 650; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.step[data-role="weak"] .step-who { color: var(--sage); }
.step[data-role="strong"] .step-who { color: var(--accent); }
.step h3 { margin: 0 0 8px; font-size: 21px; }
.step p { margin: 0; font-size: 15px; line-height: 1.7; color: #4d4841; }
.principle { margin: 30px 0 0; padding: 22px 26px; background: var(--accent-soft); border: 1px solid #e3cdbf; border-left: 3px solid var(--accent); border-radius: 10px; }
.principle .section-kicker { margin-bottom: 8px; }
.principle ul { margin: 0; padding-left: 1.1em; }
.principle li { margin: 0 0 .5em; font-size: 16px; line-height: 1.75; }
.principle li:last-child { margin-bottom: 0; }

/* results */
.result-summary { display: grid; grid-template-columns: repeat(3, 1fr); margin: 30px 0 10px; padding: 20px 0; border-block: 1px solid var(--line); }
.result-summary > div { padding-inline: 20px; }
.result-summary > div:first-child { padding-left: 0; }
.result-summary > div + div { border-left: 1px solid var(--line); }
.result-number { display: block; color: var(--accent); font: 500 clamp(30px, 4vw, 42px)/1.2 var(--serif); letter-spacing: -.04em; white-space: nowrap; }
.result-number > span { font-size: .55em; letter-spacing: 0; margin-left: 2px; }
.result-description { display: block; font-size: 12px; line-height: 1.6; color: var(--muted); margin-top: 11px; }
.aside-note { color: var(--muted); font-size: 15px; line-height: 1.85; }

/* closing */
.discussion-divider { margin: 36px 0; border: 0; border-top: 1px solid var(--line); }
.closing-note { display: flex; align-items: flex-start; gap: 20px; border-block: 1px solid var(--line); margin-top: 38px; padding: 29px 0; }
.closing-mark { width: 34px; height: 34px; flex: 0 0 34px; margin-top: 3px; }
.closing-note p { font: 22px/1.6 var(--serif); margin: 0; }
.citation { margin-top: 40px; }
.citation-code { margin: 0; padding: 20px 22px; overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: #f2efe8; color: var(--ink); font: 13px/1.8 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; white-space: pre; tab-size: 2; }
.citation-code code { font: inherit; }
.last-section { padding-bottom: 65px; }
.site-footer { padding-block: 26px 40px; border-top: 1px solid var(--line); }
.footer-brand { font: 600 20px var(--serif); text-decoration: none; }
.footer-brand span { color: var(--accent); font: 17px var(--sans); }
.site-footer p { font-size: 12px; margin: 8px 0 0; color: var(--muted); }

@media (max-width: 860px) {
  .steps { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  body { font-size: 17px; }
  .site-header nav { gap: 16px; }
  .hero { padding-top: 48px; }
  .hero-summary { font-size: 23px; }
  .result-summary { grid-template-columns: 1fr; }
  .result-summary > div { padding: 12px 0; }
  .result-summary > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .paper-image { margin: 12px 10px 4px; padding: 6px; }
  figcaption { padding-inline: 14px; }
  blockquote { font-size: 20px; }
}
@media (max-width: 520px) {
  .site-header nav { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }