:root {
  --ink: #101114;
  --paper: #f5f5f2;
  --white: #ffffff;
  --muted: #63666d;
  --line: #d9dad6;
  --accent: #3155d9;
  --accent-soft: #e8ecff;
  --max: 1240px;
  --pad: clamp(1.25rem, 4vw, 4rem);
}

* { box-sizing: border-box; }
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;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: .2em; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; background: var(--white); padding: .75rem 1rem; border: 1px solid var(--ink); }
.skip-link:focus { top: 1rem; }
.section-shell { width: min(100%, var(--max)); margin-inline: auto; padding-inline: var(--pad); }

.site-header {
  width: min(100%, var(--max));
  margin-inline: auto;
  padding: 1.15rem var(--pad);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
}
.brand { width: 2.65rem; height: 2.65rem; display: grid; place-items: center; background: var(--ink); color: var(--white); border-radius: 50%; text-decoration: none; font-weight: 800; letter-spacing: -.04em; }
nav { display: flex; gap: 1.5rem; }
nav a, .header-resume { font-size: .9rem; font-weight: 650; text-decoration: none; }
nav a:hover, nav a:focus-visible, .header-resume:hover, .header-resume:focus-visible { text-decoration: underline; }
.header-resume { justify-self: end; }

.hero { min-height: 760px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(310px, .6fr); align-items: center; gap: clamp(3rem, 8vw, 8rem); padding-top: clamp(5rem, 10vw, 9rem); padding-bottom: clamp(5rem, 10vw, 9rem); }
.eyebrow, .section-number, .case-meta, .proof-kicker { margin: 0 0 1.25rem; color: var(--muted); font-size: .78rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 2rem; font-size: clamp(4.7rem, 12vw, 10rem); line-height: .82; letter-spacing: -.085em; font-weight: 760; }
.positioning { max-width: 760px; margin-bottom: 1rem; font-size: clamp(1.45rem, 3vw, 2.35rem); line-height: 1.23; letter-spacing: -.035em; }
.hero-detail { color: var(--muted); font-size: .95rem; }
.button-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.button { display: inline-flex; min-height: 3rem; align-items: center; justify-content: center; padding: .75rem 1.2rem; border: 1px solid var(--ink); text-decoration: none; font-weight: 750; transition: background .16s ease, color .16s ease; }
.button-primary { background: var(--ink); color: var(--white); }
.button-primary:hover, .button-primary:focus-visible { background: var(--accent); border-color: var(--accent); }
.button-secondary:hover, .button-secondary:focus-visible { background: var(--white); }

.proof-panel { align-self: stretch; display: flex; flex-direction: column; justify-content: center; padding: clamp(1.5rem, 4vw, 2.75rem); background: var(--ink); color: var(--white); }
.proof-kicker { color: #aeb2ba; }
.proof-panel dl { margin: 0; }
.proof-panel dl div { padding: 1.25rem 0; border-top: 1px solid #34363d; }
.proof-panel dt { color: #aeb2ba; font-size: .78rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.proof-panel dd { margin: .4rem 0 0; font-size: 1.08rem; line-height: 1.4; }
.proof-panel dd span { color: #aeb2ba; font-size: .83rem; }

.work-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: end; padding-top: 7rem; padding-bottom: 4rem; border-top: 1px solid var(--line); }
h2 { margin-bottom: 0; font-size: clamp(2.5rem, 6vw, 5rem); line-height: 1; letter-spacing: -.06em; }
.work-intro > p { justify-self: end; max-width: 480px; color: var(--muted); font-size: 1.1rem; }

.case-study { padding-top: 5.5rem; padding-bottom: 6.5rem; }
.case-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(230px, 350px); gap: 3rem; align-items: end; margin-bottom: 3rem; }
.case-heading h3 { max-width: 900px; margin-bottom: 0; font-size: clamp(2.2rem, 5vw, 4.8rem); line-height: 1.02; letter-spacing: -.055em; }
.case-role { margin-bottom: .25rem; color: var(--muted); font-size: .93rem; }
.case-role strong { color: var(--ink); }
.gallery { display: grid; gap: 1rem; margin: 0 0 3rem; }
.gallery-four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.gallery-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gallery figure { margin: 0; }
.gallery img { width: 100%; aspect-ratio: 1; object-fit: cover; background: #e8e6e1; }
.gallery figcaption { margin-top: .65rem; color: var(--muted); font-size: .78rem; }
.case-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: clamp(3rem, 8vw, 8rem); margin-top: 3rem; padding-top: 3rem; border-top: 1px solid var(--line); }
.case-summary p { max-width: 660px; color: var(--muted); }
.case-summary .lead { color: var(--ink); font-size: clamp(1.25rem, 2.2vw, 1.7rem); line-height: 1.42; letter-spacing: -.02em; }
.case-details { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.case-details h4 { margin: 0 0 .65rem; font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; }
.case-details p { margin-bottom: 0; color: var(--muted); font-size: .92rem; }
.skill-tags { display: flex; flex-wrap: wrap; gap: .55rem; margin: 3rem 0 0; padding: 0; list-style: none; }
.skill-tags li { padding: .42rem .75rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .78rem; }

.dark-case { background: var(--ink); color: var(--white); }
.dark-case .case-meta, .dark-case .case-role, .dark-case .gallery figcaption, .dark-case .case-summary p, .dark-case .case-details p { color: #b8bbc2; }
.dark-case .case-role strong, .dark-case .case-summary .lead { color: var(--white); }
.dark-case .case-grid { border-color: #36383f; }
.dark-case .skill-tags li { border-color: #3a3d44; color: #c8cad0; }
.brand-gallery img { border: 1px solid #30333a; }
.liennow-gallery figure:last-child { grid-column: span 1; }

.research-case { background: #e9edf8; padding-top: 5.5rem; padding-bottom: 6.5rem; }
.research-layout { display: grid; grid-template-columns: .42fr .58fr; gap: 2rem; }
.research-stats { display: grid; grid-template-columns: repeat(3, 1fr); align-content: start; border-top: 1px solid #b8bfd5; }
.research-stats div { padding: 1.5rem .8rem 1.5rem 0; border-bottom: 1px solid #b8bfd5; }
.research-stats strong { display: block; font-size: clamp(2.5rem, 5vw, 4.8rem); line-height: 1; letter-spacing: -.06em; }
.research-stats span { display: block; margin-top: .6rem; color: #596073; font-size: .8rem; line-height: 1.35; }
.table-wrap { overflow-x: auto; background: var(--white); box-shadow: 0 18px 40px rgba(30, 45, 90, .08); }
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th, td { padding: 1rem 1.1rem; border-bottom: 1px solid #e1e3ea; text-align: left; vertical-align: top; }
th { background: #171b2b; color: var(--white); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
td { font-size: .86rem; }
.research-case .case-grid { border-color: #b8bfd5; }
.research-case .skill-tags li { border-color: #b8bfd5; color: #4d5467; }

.academic-case { padding-bottom: 8rem; }
.insight-board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.insight-board div { min-height: 230px; padding: 1.75rem; background: var(--white); }
.insight-board span { display: block; margin-bottom: 4rem; color: var(--accent); font-size: .75rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.insight-board p { margin-bottom: 0; font-size: clamp(1.15rem, 2vw, 1.55rem); line-height: 1.35; letter-spacing: -.02em; }

.about { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); gap: clamp(4rem, 10vw, 10rem); padding-top: 7rem; padding-bottom: 7rem; border-top: 1px solid var(--line); }
.about-main h2 { max-width: 820px; margin-bottom: 2.5rem; }
.about-main > p:not(.section-number) { max-width: 760px; color: var(--muted); font-size: 1.07rem; }
.experience-list { padding-top: 3.5rem; }
.experience-list div { padding: 1.4rem 0; border-top: 1px solid var(--line); }
.experience-list span { color: var(--muted); font-size: .78rem; }
.experience-list h3 { margin: .45rem 0 .1rem; font-size: 1.05rem; }
.experience-list p { margin: 0; color: var(--muted); }

.skills { display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(3rem, 8vw, 8rem); padding-top: 7rem; padding-bottom: 8rem; border-top: 1px solid var(--line); }
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 2rem; }
.skills-grid div { padding: 1.5rem 0; border-top: 1px solid var(--line); }
.skills-grid h3 { margin-bottom: .65rem; font-size: 1rem; }
.skills-grid p { margin-bottom: 0; color: var(--muted); }

.contact { background: var(--accent); color: var(--white); }
.contact-inner { padding-top: 6rem; padding-bottom: 6rem; }
.contact .section-number { color: #c7d0ff; }
.contact h2 { max-width: 850px; }
.contact > .contact-inner > p:not(.section-number) { max-width: 660px; margin-top: 2rem; color: #e2e6ff; font-size: 1.1rem; }
.contact-links { display: flex; flex-wrap: wrap; gap: 1rem 2rem; margin-top: 3rem; }
.contact-links a { font-weight: 800; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.65); }
.contact-links a:hover, .contact-links a:focus-visible { border-color: var(--white); }
.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding-top: 1.75rem; padding-bottom: 1.75rem; color: var(--muted); font-size: .78rem; }
.site-footer p { margin: 0; }

:focus-visible { outline: 3px solid #f0a500; outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 3rem; }
  .proof-panel { min-height: auto; }
  .work-intro, .case-heading, .case-grid, .about, .skills { grid-template-columns: 1fr; }
  .work-intro > p { justify-self: start; }
  .gallery-four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-details { grid-template-columns: 1fr; }
  .research-layout { grid-template-columns: 1fr; }
  .experience-list { padding-top: 0; }
}

@media (max-width: 640px) {
  .site-header { padding-top: .85rem; padding-bottom: .85rem; }
  .header-resume { font-size: .82rem; }
  .hero { padding-top: 4.5rem; padding-bottom: 4.5rem; }
  h1 { font-size: clamp(4.2rem, 24vw, 7rem); }
  .positioning { font-size: 1.35rem; }
  .work-intro { padding-top: 5rem; gap: 1.5rem; }
  .case-study, .research-case { padding-top: 4.5rem; padding-bottom: 5rem; }
  .case-heading { gap: 1.25rem; }
  .gallery, .gallery-four, .gallery-three { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; gap: .8rem; padding-bottom: .8rem; }
  .gallery figure { flex: 0 0 82%; scroll-snap-align: start; }
  .research-stats { grid-template-columns: 1fr; }
  .research-stats div { display: grid; grid-template-columns: 100px 1fr; align-items: end; }
  .research-stats span { margin: 0 0 .35rem; }
  .insight-board { grid-template-columns: 1fr; }
  .insight-board div { min-height: 190px; }
  .insight-board span { margin-bottom: 2.5rem; }
  .skills-grid { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; gap: .35rem; }
}