:root {
  --color-surface: #f8f7f4;
  --color-ink: #0f1419;
  --color-muted: #5c6570;
  --color-border: #e2e4e8;
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace
}

#about > div { display: flow-root }

#about h1 { margin-bottom: 2rem }

#about img {
  width: 100%;
  max-width: 24rem;
  height: auto;
  margin: 0 auto 2rem auto;
  display: block;
  border-radius: 4px;
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1)
}

@media (min-width: 768px) {
  #about img {
    float: left;
    max-width: 18rem;
    margin: 0.5rem 2rem 1rem 0
  }
}

* { box-sizing: border-box }
  
html { scroll-behavior: smooth }

body {
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  margin: 0;
  line-height: 1.6
}

h1, h2, h3, p, ul, dl, dd {
  margin: 0;
  padding: 0
}

ul { list-style: none }

a {
  text-decoration: none;
  transition: color 0.2s ease
}

header > div,
section > div,
footer > div {
  max-width: 48rem;
  margin: 0 auto;
  padding: 0 1.5rem
}

section > div > p {
  font-size: 1rem;
  color: rgb(from var(--color-ink) r g b / 90%);
  max-width: 42rem;
  margin-bottom: 1.5rem;
}

/* Adds the big gap only after the final intro paragraph before a list or the end of a section */
section > div > p:last-of-type {
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  section > div > p { font-size: 1.125rem; }
}

section {
  scroll-margin-top: 5rem;
  border-bottom: 1px solid var(--color-border);
  padding: 4rem 0
}

@media (min-width: 768px) {
  section { padding: 8rem 0 }
}

header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--color-border);
  background-color: rgb(from var(--color-surface) r g b / 95%);
  backdrop-filter: blur(8px)
}

nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 0
}

@media (min-width: 640px) {
  nav {
    flex-direction: row;
    align-items: center;
    justify-content: space-between
  }
}

#nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-ink)
}

#nav-logo:hover { color: var(--color-muted) }

nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.5rem
}

nav a:not(#nav-logo) {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted)
}

nav a:not(#nav-logo):hover { color: var(--color-ink) }

h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2
}

@media (min-width: 768px) {
  h1 { font-size: 3rem }
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 2rem
}

@media (min-width: 768px) {
  h2 { font-size: 1.875rem }
}

.item-list {
  display: flex;
  flex-direction: column;
  gap: 2.5rem
}

h3, dt {
  font-size: 1rem;
  font-weight: 600
}

p, dd {
  margin-top: 0.5rem;
  font-size: 1rem;
  color: rgb(from var(--color-ink) r g b / 85%)
}

.sub-section {
  margin-top: 4rem;
  border-top: 1px solid var(--color-border);
  padding-top: 3rem
}

.sub-section h3 {
  font-size: 1.1rem;
  margin-bottom: 1.5rem
}

.education-list li {
  margin-bottom: 0.75rem;
  color: rgb(from var(--color-ink) r g b / 85%)
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin-top: 3rem
}

.social-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink);
  border-bottom: 1px solid rgb(from var(--color-ink) r g b / 20%);
  padding-bottom: 0.125rem
}

.social-links a:hover { border-color: var(--color-ink) }

dd a {
  text-decoration: underline;
  text-decoration-color: rgb(from var(--color-ink) r g b / 30%);
  text-underline-offset: 4px
}

dd a:hover { text-decoration-color: var(--color-ink) }

footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border)
}

footer p {
  font-size: 0.875rem;
  color: var(--color-muted)
}