:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --ink: #111111;
  --ink-muted: #57534e;
  --ink-faint: #a8a29e;
  --line: #e7e5e4;
  --accent: #0891b2;
  --radius: 14px;
  --measure: 34rem;
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0a09;
    --surface: #1c1917;
    --ink: #fafaf9;
    --ink-muted: #a8a29e;
    --ink-faint: #78716c;
    --line: #292524;
    --accent: #22d3ee;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.075rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: 0.5rem 0.875rem;
  background: var(--ink);
  color: var(--bg);
  border-radius: 8px;
  text-decoration: none;
}

/* Layout */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(12px);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 62rem;
  margin-inline: auto;
  padding: 0.875rem 1.25rem;
}

.nav__mark {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ink);
}

.nav__links {
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__links a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 150ms ease;
}

.nav__links a:hover {
  color: var(--ink);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 200ms ease, opacity 150ms ease;
}

.nav__toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* Container without media-query breakpoint ladder: one fluid measure. */
main {
  max-width: 62rem;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.hero {
  padding-block: clamp(4rem, 12vw, 8rem) clamp(3rem, 9vw, 6rem);
}

.hero__eyebrow {
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.hero__title {
  margin: 0;
  font-size: clamp(2.25rem, 1.4rem + 5.2vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 600;
  max-width: 20ch;
}

.hero__title-muted {
  color: var(--ink-faint);
}

.hero__lede {
  margin: 1.75rem 0 0;
  max-width: var(--measure);
  font-size: 1.125rem;
  color: var(--ink-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.section {
  padding-block: clamp(3rem, 8vw, 5rem);
  border-top: 1px solid var(--line);
}

.section__title {
  margin: 0 0 2rem;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
}

.section--split {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  align-items: start;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform 150ms ease, background-color 150ms ease, border-color 150ms ease;
}

.btn--small {
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
}

.btn--primary {
  background: var(--ink);
  color: var(--bg);
}
.btn--primary:hover {
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover {
  border-color: var(--ink-faint);
}

/* Work cards */

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.card {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 200ms ease, border-color 200ms ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--ink-faint);
}

.card__title {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
}

.card__body {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.9375rem;
}

.card__meta {
  margin: 1rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
}

/* About */

.prose {
  margin: 0 0 1.25rem;
  max-width: var(--measure);
  color: var(--ink-muted);
}

.facts {
  margin: 0;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.facts__row {
  display: grid;
  gap: 0.25rem;
  padding-block: 0.875rem;
}
.facts__row + .facts__row {
  border-top: 1px solid var(--line);
}

.facts dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.facts dd {
  margin: 0;
  font-size: 0.9375rem;
}

.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 0.4rem;
  border-radius: 50%;
  background: #22c55e;
  vertical-align: middle;
}

/* Contact */

.contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.contact__email {
  font-family: var(--font-mono);
  font-size: clamp(1.125rem, 0.9rem + 1.2vw, 1.75rem);
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration-color: var(--ink-faint);
  text-underline-offset: 4px;
}
.contact__email:hover {
  color: var(--accent);
}

.socials {
  display: flex;
  gap: 1.25rem;
  margin: 2.5rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
}

.socials a {
  color: var(--ink-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.socials a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink-faint);
}

/* Footer */

.site-footer {
  max-width: 62rem;
  margin-inline: auto;
  padding: 2.5rem 1.25rem 3.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 0.875rem;
}

/* Reveal animation */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 600ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Small screens: nav collapses into the toggle menu. */
@media (max-width: 30rem) {
  .nav__toggle {
    display: flex;
  }
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.25rem 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
  }
  .nav__links.is-open {
    display: flex;
  }
  .nav__links li + li {
    border-top: 1px solid var(--line);
  }
  .nav__links a {
    display: block;
    padding: 0.75rem 0;
  }
}