/* ===== Design tokens ===== */
:root {
  --bg: #f5f2ec;
  --ink: #1a1714;
  --line: rgba(0, 0, 0, .1);
  --line2: rgba(0, 0, 0, .15);
  --panel: rgba(0, 0, 0, .04);
  --accent: #cb0030;
  --on-accent: #ffffff;
  --stripe-a: #e8e3d8;
  --stripe-b: #f0ebe0;
  --sticky: rgba(245, 242, 236, .82);

  --pad: 3rem;
  --cols-2: repeat(2, 1fr);
  --cols-3: repeat(3, 1fr);
  --cols-4: repeat(4, 1fr);
  --foot-cols: 1.5fr 1fr 1fr;
  --rail-cols: 210px 1fr;
  --nav-links-display: flex;
  --hamburger-display: none;

  color-scheme: light dark;

  --font-size-small     : .75rem;
  --font-size-default   : 1rem;
  --font-size-section   : 1.5rem;
  --font-size-card-title: 1.5rem;
  --font-size-big-title : 2rem;
  --font-size-card-text : 1rem;
  --font-size-card-tag  : var(--font-size-small);
  --font-size-button    : var(--font-size-default);
}

:root[data-theme="dark"] {
  --bg: #161418;
  --ink: #efe9df;
  --line: rgba(255, 255, 255, .1);
  --line2: rgba(255, 255, 255, .14);
  --panel: rgba(255, 255, 255, .05);
  --accent: #f94a73;
  --on-accent: #000000;
  --stripe-a: #232026;
  --stripe-b: #1c1a20;
  --sticky: rgba(22, 20, 24, .82);
    --focus: var(--accent);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161418;
    --ink: #efe9df;
    --line: rgba(255, 255, 255, .1);
    --line2: rgba(255, 255, 255, .14);
    --panel: rgba(255, 255, 255, .05);
    --accent: #cb0030;
    --on-accent: #ffffff;
    --stripe-a: #232026;
    --stripe-b: #1c1a20;
    --sticky: rgba(22, 20, 24, .82);
      --focus: var(--on-accent);
  }
}

@media (max-width: 56.25rem) {
  :root {
    --pad: 2rem;
    --cols-3: repeat(2, 1fr);
    --cols-4: repeat(2, 1fr);
    --foot-cols: 1fr 1fr;
    --rail-cols: 1fr;
  }
}

@media (max-width: 45rem) {
  :root {
    --nav-links-display: none;
    --hamburger-display: inline-flex;
    --toc-display: block;
  }
}

@media (max-width: 35rem) {
  :root {
    --pad: 1.25rem;
    --cols-2: 1fr;
    --cols-3: 1fr;
    --cols-4: 1fr;
    --foot-cols: 1fr;
    --rail-cols: 1fr;
    --toc-display: none;
  }
}

/* ===== Reset ===== */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Lexend', system-ui, sans-serif;
  font-size: var(--font-size-default);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }
:focus-visible {
  outline: .125rem solid var(--accent);
  outline-offset: .25rem;
}

/* ===== Header / nav ===== */
.skip-link {
  position: absolute;
  top: -100rem; left: -100rem;
  z-index: 1000;
  &:focus-visible {
    top: 1rem; left: 1rem;
  }
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--sticky);
  backdrop-filter: blur(.75rem);
  border-bottom: 1px solid var(--line);
}
.site-header__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem var(--pad);
  max-width: 77.5rem;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  text-decoration: none;
}
.brand__mark {
  width: 2rem;
  height: 2rem;
  border-radius: .5rem;
  background: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--on-accent);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand__name {
  font-weight: 700;
  letter-spacing: -0.01em;
}

.site-nav {
  display: var(--nav-links-display);
  align-items: center;
  gap: 1.5rem;
}
.site-nav__link {
  font-weight: 500;
  text-decoration: none;
}
.site-nav__link:hover { 
  color: var(--accent); 
}
.nav-list {
  display:flex;align-items:center;gap:26px;list-style:none;margin:0;padding:0
}

.theme-toggle {
  font-size: var(--font-size-button);
  font-weight: 600;
  color: var(--ink);
  background: var(--panel);
  border: .0625rem solid var(--line2);
  border-radius: .25rem;
  padding: .5rem 1rem;
  cursor: pointer;
}
.theme-toggle:hover { border-color: var(--accent); }

.hamburger {
  display: var(--hamburger-display);
  align-items: center;
  gap: .5rem;
  color: var(--ink);
  background: none;
  border: 1px solid var(--line2);
  border-radius: .125rem;
  padding: .5rem 1rem;
  font-weight: 600;
  cursor: pointer;
}
.hamburger__lines {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}
.hamburger__lines span {
  width: 1rem;
  height: .125rem;
  background: var(--ink);
  display: block;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: .5rem var(--pad) 1.25rem;
  gap: .125rem;
}
.mobile-nav.is-open { display: flex; }
.mobile-nav__link {
  font-weight: 500;
  text-decoration: none;
  padding: .75rem 0;
  border-top: 0.0625rem solid var(--line);
}
.mobile-nav .theme-toggle { align-self: flex-start; margin-top: .75rem; }

/* ===== Scroll progress (case studies) ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: .125rem;
  width: 0%;
  background: var(--accent);
  z-index: 10;
}

/* ===== Hero ===== */
.hero {
  padding: 5.625rem var(--pad) 2rem;
  max-width: 77.5rem;
  margin: 0 auto;
}
.hero__title {
  font-size: clamp(3.25rem, 10vw, 9.375rem);
  line-height: .92;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin: 0;
  text-wrap: balance;
}
.hero__title em {
  font-style: normal;
  color: var(--accent);
}
.hero__row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.875rem;
  margin-top: 2rem;
  border-bottom: 1px solid var(--line2);
  padding-bottom: 2rem;
}
.hero__lede {
  font-size: var(--font-size-card-title);
  line-height: 1.6;

  max-width: 52ch;
  margin: 0;
  font-weight: 300;
}
.button {
  cursor: pointer;
  align-self: flex-end;
  font-size: var(--font-size-button);
  font-weight: 600;
  color: var(--on-accent);
  background: var(--accent);
  padding: 1rem 1.25rem;
  border-radius: .25rem;
  white-space: nowrap;
  text-decoration: none;
  display: inline-flex;
  border: none;
  transition: transform .15s ease;
}
.button:hover { transform: translateY(-.125rem); }

/* ===== Sections ===== */
.section {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 3rem var(--pad) 3rem;
  scroll-margin-top: 80px;
}
.section--work { padding-top: 0; }
.section__eyebrow {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .16em;
  color: var(--accent);
  margin: 0 0 2rem;
}

/* Shared card hover */
.card-hover {
  transition: border-color .2s ease;
}
.card-hover:hover {
  border-color: var(--accent);
}

/* Featured project */
.featured-project {
  cursor: pointer;
  display: block;
  text-decoration: none;
  border-radius: 1.125rem;
  overflow: hidden;
  position: relative;
  margin-bottom: 1.25rem;
  border: .0625rem solid var(--line);
  color: inherit;
}
.featured-project__cover {
  aspect-ratio: 16 / 9;
  background-image: repeating-linear-gradient(135deg, var(--stripe-a) 0 1rem, var(--stripe-b) 1rem 2rem);
  display: flex;
  align-items: flex-end;
}
.placeholder-tag {
  font-family: ui-monospace, monospace;
  font-size: var(--font-size-small);

  background: var(--bg);
  padding: .25rem .75rem;
  border-radius: 6px;
}
.featured-project__body {
  padding: 2rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.featured-project__kicker {
  font-family: ui-monospace, monospace;
  font-size: var(--font-size-small);
  color: var(--accent);
  margin-bottom: .75rem;
}
.featured-project__title {
  font-size: var(--font-size-big-title);
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}
.featured-project__excerpt {

  max-width: 40ch;
  margin: 0;
  font-weight: 300;
}

/* Project grid */
.project-grid {
  display: grid;
  grid-template-columns: var(--cols-3);
  gap: 1.25rem;
}
.project-card {
  cursor: pointer;
  text-decoration: none;
  display: block;
  border: 1px solid var(--line);
  border-radius: 1rem;
  overflow: hidden;
  color: inherit;
}
.project-card:hover { background: var(--panel); }
.project-card__cover {
  aspect-ratio: 16 / 10;
  background-image: repeating-linear-gradient(135deg, var(--stripe-a) 0 .75rem, var(--stripe-b) .75rem 1.5rem);
}
.project-card__body { padding: 1.25rem 1.25rem; }
.project-card__title { font-size: var(--font-size-card-title); font-weight: 600; margin: 0 0 8px; }
.project-card__excerpt { font-size: var(--font-size-card-text); line-height: 1.5; margin: 0; font-weight: 300; }

/* Capabilities grid */
.capabilities-grid {
  display: grid;
  grid-template-columns: var(--cols-4);
  gap: .0625rem;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: .875rem;
  overflow: hidden;
}
.capability { background: var(--bg); padding: 1.5rem 1.5rem; }
.capability__title { font-size: var(--font-size-card-text); font-weight: 700; margin: 0 0 .75rem; }
.capability__desc { font-size: var(--font-size-card-text); line-height: 1.6; margin: 0 0 1rem; font-weight: 300; }
.capability__list { display: flex; flex-direction: column; gap: .5rem; }

/* Certifications */
.certs-grid {
  display: grid;
  grid-template-columns: var(--cols-2);
  gap: .75rem;
}
.cert-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border: .0625rem solid var(--line);
  border-radius: .75rem;
  text-decoration: none;
  color: inherit;
}
.cert-card:hover { border-color: var(--accent); background: var(--panel); }
.cert-card__title { font-size: var(--font-size-card-text); font-weight: 600; }
.cert-card__desc { font-size: var(--font-size-card-text); font-weight: 300; }
.cert-card__date { font-family: ui-monospace, monospace; white-space: nowrap; }

/* Talks */
.talks-grid {
  display: grid;
  grid-template-columns: var(--cols-3);
  gap: 1.25rem;
}
.talk-card {
  text-decoration: none;
  border: .0625rem solid var(--line);
  border-radius: .75rem;
  overflow: hidden;
  display: block;
  color: inherit;
}
.talk-card:hover { border-color: var(--accent); }
.talk-card__cover {
  position: relative;
  aspect-ratio: 16 / 9;
  background-image: repeating-linear-gradient(135deg, var(--stripe-a) 0 .75rem, var(--stripe-b) .75rem 1.5rem);
  display: flex;
  align-items: center;
  justify-content: center;
}
.talk-card__play {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-card-text);
  padding-left: .25rem;
}
.talk-card__body { padding: 1rem 1.25rem; }
.talk-card__title { font-size: var(--font-size-card-text); font-weight: 600; margin: 0 0 .5rem; }
.talk-card__desc { font-size: var(--font-size-small); line-height: 1.5; margin: 0; font-weight: 300; }

/* References */
.refs-grid {
  display: grid;
  grid-template-columns: var(--cols-3);
  gap: .75rem;
}
.ref-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1rem;
  border: .0625rem solid var(--line);
  border-radius: .75rem;
  text-decoration: none;
  color: inherit;
}
.ref-card:hover { border-color: var(--accent); }
.ref-card__avatar {
  flex: none;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  overflow: hidden;
  background-image: repeating-linear-gradient(135deg, var(--stripe-a) 0 .5rem, var(--stripe-b) .5rem 1rem);
  border: .0625rem solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
}
.ref-card__avatar span {
  font-family: ui-monospace, monospace;
  font-size: var(--font-size-small);
}
.ref-card__text { min-width: 0; }
.ref-card__name { display: block; font-size: var(--font-size-card-text); font-weight: 600; }
.ref-card__desc { display: block; font-size: var(--font-size-card-text); font-weight: 300; }

/* ===== Case study ===== */
.case-back {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 2rem var(--pad) 0;
}
.case-back__link {
  cursor: pointer;
  font-size: var(--font-size-small);
  text-decoration: none;
}

.case-header {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 2.5rem var(--pad) 2.5rem;
}
.case-header__kicker {
  letter-spacing: .12em;
  color: var(--muted);
  margin: 0 0 0 .4375rem;
}
.case-header__title {
  font-size: clamp(2.75rem, 8vw, 6.5rem);
  line-height: .95;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0;
}
.case-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  border-top: 1px solid var(--line2);
  padding-top: 1.5rem;
}
.case-stats dt {
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: .25rem;
}
.case-stats dd {
  font-weight: 600;
  margin: 0;
}

.case-hero {
  border: .0625rem solid var(--line);
  margin: 0 0 2.5rem 0;
}

.case-layout {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 0 var(--pad) 2.5rem;
  display: grid;
  grid-template-columns: var(--rail-cols);
  gap: 3.5rem;
  align-items: start;
}
.case-toc {
  position: sticky;
  top: 6.25rem;
  display: var(--toc-display);
}
.case-toc__label {
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: .14em;

  margin: 0 0 1rem;
}
.case-toc__link {
  display: flex;
  gap: .75rem;
  align-items: baseline;
  padding: .5rem 0;
  border-top: .0625rem solid var(--line);
  text-decoration: none;
}
.case-toc__link:hover { opacity: .6; }
.case-toc__link.is-active .case-toc__name { font-weight: 700; }
.case-toc__num {
  font-family: ui-monospace, monospace;
  font-size: var(--font-size-small);
  color: var(--accent);
}
.case-toc__name { font-size: var(--font-size-small); line-height: 1.4; transition: font-weight .2s ease, color .2s ease; }

.case-body { min-width: 0; }
.case-section {
  padding: 2rem 0;
  border-top: .0625rem solid var(--line);
  scroll-margin-top: 2rem;
}
.case-section__heading {
  font-size: var(--font-size-section);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--accent);
  margin: 0 0 1rem;
}
.case-section__content {
  font-size: var(--font-size-default);
  line-height: 1.75;
  margin: 0;
  font-weight: 300;
  text-wrap: pretty;
}
.case-media {
  display: grid;
  grid-template-columns: var(--cols-2);
  gap: .75rem;
  margin-top: 1.5rem;
}
.case-media__item {
  aspect-ratio: 4 / 3;
  border-radius: .75rem;
  background-image: repeating-linear-gradient(135deg, var(--stripe-a) 0 .75rem, var(--stripe-b) .75rem 1.5rem);
  border: .0625rem solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  margin: 0;
}
.case-media__item img {
  box-shadow: 0 .25rem .75rem 0 rgba(26, 23, 20, .5);
}
.case-media__item figcaption {
  font-family: ui-monospace, monospace;
  font-size: var(--font-size-small);
  text-align: center;
  line-height: 1.5;
}
.case-cta { 
  margin-top: 2rem; 
  padding: 1rem 2rem; 
}

/* ===== Footer ===== */
.site-footer {
  margin-top: 100/16rem;
  border-top: 1px solid var(--line2);
  padding: 4rem 0 0;
  scroll-margin-top: 4rem;
}
.site-footer__hire {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 0 var(--pad) 3.5rem;
}
.site-footer__hire p {
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0;
}
.site-footer__grid {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 0 var(--pad) 2.5rem;
  display: grid;
  grid-template-columns: var(--foot-cols);
  gap: 3rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.125rem;
}
.footer-brand .brand__mark { width: 2rem; height: 2rem; border-radius: .5rem; }
.footer-brand .brand__name { font-size: var(--font-size-default); }
.site-footer__blurb {
  font-size: var(--font-size-section);
  line-height: 1.65;
  margin: 0 0 1.5rem;
  max-width: 36ch;
  font-weight: 300;
}
.linkedin-link {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  font-weight: 600;
  padding: .75rem 1.5rem;
  border: 1px solid var(--line2);
  border-radius: .25rem%;
  text-decoration: none;
}
.linkedin-link:hover { border-color: var(--accent); color: var(--accent); }
.linkedin-link__dot {
  width: .5rem;
  height: .5rem;
  border-radius: .125rem;
  background: var(--accent);
}
.footer-col__label {
  font-size: var(--font-size-small);
  text-transform: uppercase;
  letter-spacing: .16em;
  margin: 0 0 .25rem;
}
.footer-col li {
  padding: .5rem 0;
  border-top: .0625rem solid var(--line);
}
.footer-col a { text-decoration: none; display: block; }
.footer-col a:hover { color: var(--accent); }

.site-footer__links {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 0 var(--pad) 44px;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  border-top: .0625rem solid var(--line);
  padding-top: 2rem;
}
.site-footer__links a {
  font-weight: 500;
  text-decoration: none;
}
.site-footer__links a:hover { color: var(--accent); }

.site-footer__legal {
  border-top: .0625rem solid var(--line);
  margin-top: 3.5rem;
}
.site-footer__legal-row {
  max-width: 77.5rem;
  margin: 0 auto;
  padding: 1.5rem var(--pad);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: var(--font-size-small);
  color: var(--ink);
}