:root {
  color-scheme: light;
  --paper: #fafaf7;
  --paper-tint: #f0f0ea;
  --ink: #1a1a1a;
  --ink-700: #3a3a3a;
  --ink-500: #6b6b6b;
  --line: #d9d9d2;
  --accent: #b8dcff;
  --accent-strong: #4b9ee8;
  --font-display: "Jost", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--font-body); font-size: 16px; line-height: 1.6; }
a { color: inherit; }
h1, h2, h3, p { margin-top: 0; }

.prototype-note, .wireframe-note {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--paper-tint);
  color: var(--ink-500);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-align: center;
  text-transform: uppercase;
}

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--line); background: rgba(250,250,247,.95); backdrop-filter: blur(10px); }
.nav, .hero, .section, .footer-inner, .project-hero { width: min(100% - 3rem, 1280px); margin-inline: auto; }
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; font-family: var(--font-display); font-size: 1.05rem; font-weight: 500; text-decoration: none; }
.brand-mark { width: 28px; height: 28px; display: grid; place-items: center; background: var(--ink); color: var(--accent); font-family: var(--font-mono); font-size: .65rem; }
.nav-links { display: flex; align-items: center; gap: clamp(1rem,2.5vw,2.5rem); }
.nav-links a { color: var(--ink-700); font-size: .9rem; text-decoration: none; }
.nav-links a:hover, .nav-links a:focus-visible { text-decoration: underline; text-underline-offset: .35em; }

.hero { padding: clamp(4.5rem,7vw,6.5rem) 0 0; }
.hero-meta { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2.5rem; color: var(--ink-500); font-family: var(--font-mono); font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; }
.hero-meta p { margin: 0; }
.hero h1, .project-hero h1 { margin-bottom: clamp(2rem,3.5vw,3.2rem); font-family: var(--font-display); font-size: clamp(3.8rem,8.6vw,7.5rem); font-weight: 400; letter-spacing: -.05em; line-height: .9; }
.hero h1 span { position: relative; white-space: nowrap; }
.hero h1 span::after { content: ""; position: absolute; left: .02em; right: 0; bottom: .06em; height: .1em; background: var(--accent); z-index: -1; }
.hero-lower { margin-left: auto; max-width: 680px; padding-bottom: 3rem; display: grid; grid-template-columns: 1fr auto; gap: 2.5rem; align-items: end; }
.hero-copy { margin: 0; color: var(--ink-700); font-size: clamp(1.05rem,1.7vw,1.3rem); }
.arrow-link { white-space: nowrap; font-family: var(--font-mono); font-size: .78rem; text-decoration: none; text-transform: uppercase; }
.arrow-link span { margin-left: .5rem; color: var(--accent-strong); }

.section-label, .project-meta { color: var(--ink-500); font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }

.section { padding: clamp(4.8rem,7vw,6.8rem) 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-label { margin-bottom: 2.4rem; }
.section-intro { margin-bottom: clamp(3rem,5vw,4.5rem); }
h2 { margin-bottom: 0; font-family: var(--font-display); font-size: clamp(2.7rem,4.8vw,5rem); font-weight: 400; letter-spacing: -.04em; line-height: .98; }

.about-layout { display: grid; grid-template-columns: minmax(0,.85fr) minmax(420px,1.15fr); gap: clamp(3.5rem,6vw,6rem); }
.about-narrative { max-width: 630px; }
.about-narrative p { color: var(--ink-700); }
.about-narrative .lead { color: var(--ink); font-family: var(--font-display); font-size: clamp(1.65rem,3vw,2.4rem); line-height: 1.2; }
.profile-column { display: grid; grid-template-columns: 155px 1fr; gap: 2rem; align-items: start; }
.profile-column.no-portrait { grid-template-columns: 1fr; }
.portrait-placeholder { aspect-ratio: 4 / 5; border: 1px solid var(--line); background: repeating-linear-gradient(135deg,transparent 0 9px,rgba(217,217,210,.55) 9px 10px); display: grid; place-content: center; color: var(--ink-500); font-family: var(--font-mono); font-size: .72rem; text-align: center; text-transform: uppercase; }
.portrait-placeholder small { display: block; font-size: .6rem; }
.profile-list { margin: 0; }
.profile-list > div { padding: 0 0 1.3rem; margin-bottom: 1.3rem; border-bottom: 1px solid var(--line); }
.profile-list dt { margin-bottom: .35rem; color: var(--ink-500); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.profile-list dd { margin: 0; font-size: .95rem; }

.split-heading { display: flex; justify-content: space-between; gap: 4rem; align-items: end; }
.split-heading > p { max-width: 350px; margin: 0 0 .5rem; color: var(--ink-500); }
.expertise-list { border-top: 1px solid var(--ink); }
.expertise-row { min-height: 122px; display: grid; grid-template-columns: 60px minmax(260px,1.1fr) minmax(240px,.8fr) 30px; gap: 1.5rem; align-items: center; border-bottom: 1px solid var(--line); text-decoration: none; transition: background 160ms ease,padding 160ms ease; }
.expertise-row:hover, .expertise-row:focus-visible { padding-inline: 1.25rem; background: var(--paper-tint); outline: none; }
.expertise-number { color: var(--ink-500); font-family: var(--font-mono); font-size: .72rem; }
.expertise-name { font-family: var(--font-display); font-size: clamp(1.7rem,3vw,2.8rem); line-height: 1.05; }
.expertise-description { color: var(--ink-500); font-size: .9rem; }
.expertise-arrow { color: var(--accent-strong); font-size: 1.2rem; }

.contact-section { padding-bottom: clamp(5.5rem,8vw,8rem); }
.contact-layout { display: grid; grid-template-columns: minmax(0,1.3fr) minmax(310px,.7fr); gap: clamp(4rem,8vw,8rem); align-items: end; }
.contact-copy { padding-bottom: .7rem; }
.contact-copy > p:first-child { color: var(--ink-700); font-size: 1.1rem; }
.contact-placeholder { display: inline-block; margin: 1.4rem 0; padding-bottom: .3rem; border-bottom: 1px solid var(--ink); font-family: var(--font-mono); font-size: .78rem; text-transform: uppercase; }
.contact-location { color: var(--ink-500); font-size: .82rem; }
.site-footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 105px; display: grid; grid-template-columns: 1fr 1fr auto; gap: 2rem; align-items: center; color: var(--ink-500); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.footer-inner-split { grid-template-columns: 1fr auto; }
.footer-inner a { text-decoration: none; }

.work-hero { padding-bottom: 3.75rem; }
.work-hero h1 { max-width: 1000px; }
.work-intro { max-width: 560px; margin-left: auto; color: var(--ink-700); font-size: 1.1rem; }
.filter-bar { display: flex; flex-wrap: wrap; border-block: 1px solid var(--line); }
.filter-button { padding: 1rem 1.4rem; border: 0; border-right: 1px solid var(--line); background: transparent; color: var(--ink-500); font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; cursor: pointer; }
.filter-button:hover, .filter-button:focus-visible, .filter-button.active { background: var(--ink); color: var(--paper); outline: none; }
.work-list { border-top: 1px solid var(--ink); }
.work-card { min-height: 188px; display: grid; grid-template-columns: 70px minmax(0,1.25fr) minmax(250px,.75fr) 36px; gap: 1.75rem; align-items: center; padding: 1.75rem 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.work-card[href]:hover .work-title, .work-card[href]:focus-visible .work-title { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .18em; }
.work-card-static { color: var(--ink); }
.work-number { align-self: start; color: var(--ink-500); font-family: var(--font-mono); font-size: .72rem; }
.work-title { margin: 0 0 .8rem; font-family: var(--font-display); font-size: clamp(1.9rem,3.3vw,3.45rem); font-weight: 400; line-height: 1.04; letter-spacing: -.03em; }
.work-type { color: var(--ink-500); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.work-summary { color: var(--ink-700); }
.work-tags { color: var(--ink-500); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.work-arrow { color: var(--accent-strong); font-size: 1.25rem; }
.work-arrow-muted { color: var(--line); }
.empty-state { display: none; min-height: 260px; align-items: center; justify-content: space-between; gap: 3rem; border-bottom: 1px solid var(--line); }
.empty-state h2 { font-size: clamp(2rem,4vw,4rem); }
.empty-state p { max-width: 420px; color: var(--ink-500); }

.name { font-family: var(--font-display); font-size: 1.05rem; font-weight: 500; text-decoration: none; }
.project-hero { padding: 5.5rem 0 3.25rem; }
.project-hero h1 { max-width: 1040px; font-size: clamp(3.2rem,6vw,6rem); }
.project-summary { max-width: 760px; color: var(--ink-700); font-size: 1.15rem; }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.5rem; }
.tag { padding: .25rem .5rem; border: 1px solid var(--line); color: var(--ink-500); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.project-layout { display: grid; grid-template-columns: minmax(240px,.55fr) minmax(0,1.45fr); gap: clamp(4rem,8vw,8rem); }
.project-aside { align-self: start; padding: 1.4rem; border: 1px solid var(--line); }
.project-aside dl { margin: 0; }
.project-aside dt { margin-top: 1rem; color: var(--ink-500); font-family: var(--font-mono); font-size: .68rem; text-transform: uppercase; }
.project-aside dt:first-child { margin-top: 0; }
.project-aside dd { margin: .2rem 0 0; }
.project-section { margin-bottom: 4rem; }
.project-section h2 { margin-bottom: 1.2rem; font-size: clamp(2rem,3.2vw,3rem); }
.demo-placeholder { min-height: 330px; border: 1px solid var(--line); background: var(--paper-tint); display: grid; place-items: center; padding: 2rem; color: var(--ink-500); text-align: center; }
.demo-capabilities { min-height: 0; place-items: stretch; text-align: left; }
.demo-capabilities ul { margin: 0; padding: 0; list-style: none; }
.demo-capabilities li { padding: 1rem 0; border-bottom: 1px solid var(--line); color: var(--ink-700); }
.demo-capabilities li:first-child { padding-top: 0; }
.demo-capabilities li:last-child { padding-bottom: 0; border-bottom: 0; }
.demo-capabilities li::before { content: "→"; margin-right: .75rem; color: var(--accent-strong); }
.button-row { display: flex; flex-wrap: wrap; gap: .75rem; }
.button { display: inline-block; padding: .8rem 1rem; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); font-family: var(--font-mono); font-size: .72rem; text-decoration: none; text-transform: uppercase; }
.button.secondary { background: transparent; color: var(--ink); }

@media (max-width: 880px) {
  .nav-links { gap: 1rem; }
  .nav[aria-label="Primary navigation"] .nav-links a:nth-child(2) { display: none; }
  .hero-lower { margin-left: 0; grid-template-columns: 1fr; gap: 1.5rem; }
  .about-layout, .contact-layout, .project-layout { grid-template-columns: 1fr; }
  .about-layout { gap: 4rem; }
  .split-heading { display: block; }
  .split-heading > p { margin-top: 2rem; }
  .expertise-row { grid-template-columns: 45px 1fr 24px; padding: 1.45rem 0; }
  .expertise-description { grid-column: 2; }
  .expertise-arrow { grid-column: 3; grid-row: 1 / span 2; }
  .work-card { grid-template-columns: 45px 1fr 26px; }
  .work-summary, .work-tags { grid-column: 2; }
  .work-arrow { grid-column: 3; grid-row: 1 / span 3; }
  .footer-inner { padding: 2rem 0; grid-template-columns: 1fr; gap: .7rem; }
}

@media (max-width: 600px) {
  .nav, .hero, .section, .footer-inner, .project-hero { width: min(100% - 2rem,1280px); }
  .nav { min-height: 66px; }
  .brand > span:last-child { display: none; }
  .nav[aria-label="Primary navigation"] .nav-links a:first-child { display: none; }
  .hero { padding-top: 3.75rem; }
  .hero-meta { align-items: flex-start; gap: 1rem; }
  .hero-meta p:last-child { text-align: right; }
  .hero h1 { font-size: clamp(3.1rem,14.5vw,4.5rem); line-height: .92; }
  .project-hero.long-title h1 { font-size: clamp(2.45rem,11vw,3rem); line-height: .94; }
  h2 { font-size: clamp(2.45rem,11vw,3.5rem); }
  .profile-column { grid-template-columns: 1fr; }
  .portrait-placeholder { width: 130px; }
  .expertise-row { grid-template-columns: 32px 1fr 20px; gap: 1rem; }
  .expertise-name { font-size: 1.7rem; }
  .filter-button { flex: 1 1 50%; border-bottom: 1px solid var(--line); }
  .work-card { grid-template-columns: 30px 1fr 20px; gap: 1rem; }
  .empty-state { align-items: flex-start; flex-direction: column; justify-content: center; }
}

/* ---- condensed case-study layout (2026-09-18) ---- */
.result-strip { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); margin: 0 0 .7rem; border-block: 1px solid var(--ink); }
.result-strip > div { padding: 1.05rem 1.1rem 1rem; border-right: 1px solid var(--line); }
.result-strip > div:last-child { border-right: 0; }
.result-strip b { display: block; font-family: var(--font-display); font-size: clamp(1.45rem,2.6vw,2rem); font-weight: 400; letter-spacing: -.02em; line-height: 1.05; font-variant-numeric: tabular-nums; }
.result-strip span { display: block; margin-top: .45rem; color: var(--ink-500); font-family: var(--font-mono); font-size: .75rem; letter-spacing: .06em; line-height: 1.5; text-transform: uppercase; }
.result-caption { margin: 0 0 3.5rem; color: var(--ink-500); font-family: var(--font-mono); font-size: .75rem; line-height: 1.5; letter-spacing: .03em; }

.case-thesis h2 { margin-bottom: .85rem; max-width: 22ch; font-size: clamp(1.7rem,2.8vw,2.4rem); }
.case-thesis p { max-width: 54ch; margin: 0; color: var(--ink-500); font-size: 1rem; }

.case-spec { display: grid; gap: .6rem; margin: 0; }
.case-spec > div { display: grid; grid-template-columns: 158px minmax(0,1fr); gap: 1.2rem; align-items: baseline; }
.case-spec dt { color: var(--ink-500); font-family: var(--font-mono); font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; }
.case-spec dd { margin: 0; color: var(--ink-700); font-size: .95rem; }

.case-scope { max-width: 58ch; margin: 0; color: var(--ink-500); font-size: 1rem; }
.case-lede { max-width: 56ch; margin: 0; color: var(--ink-500); font-size: 1rem; }

@media (max-width: 720px) {
  .project-layout { display: flex; flex-direction: column; gap: 0; }
  .project-layout > div { display: contents; }
  .project-layout .result-strip { order: 1; }
  .project-layout .result-caption { order: 2; }
  .project-layout > .project-aside { order: 3; }
  .project-layout .project-section { order: 4; }
  .project-layout .button-row { order: 5; }
  .result-strip { grid-template-columns: 1fr; }
  .result-strip > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .result-strip > div:last-child { border-bottom: 0; }
  .case-spec > div { grid-template-columns: 1fr; gap: .15rem; }
  .case-thesis h2 { max-width: none; }
}