* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.5;
  color: #000;
  background: #fafafa;
}

body {
  min-height: 100vh;
  margin: 0;
}

main {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}

.portrait {
  width: 8rem;
  height: 8rem;
  border-radius: 0.5rem;
  box-shadow: 0 20px 35px rgb(67 20 7 / 18%);
}

h1 {
  margin: 2rem 0 0;
  color: #ef6c35;
  font-size: 2.25rem;
  line-height: 1.1;
}

.intro {
  max-width: 38rem;
  margin: 1.5rem 0;
  color: #ef6c35;
  font-size: 1.25rem;
  text-align: center;
}

nav {
  display: grid;
  width: min(100%, 24rem);
  grid-template-columns: repeat(2, 1fr);
  align-items: center;
  justify-items: center;
  gap: 0.75rem 1.5rem;
}

nav a {
  padding: 0.125rem 0.25rem;
  color: #ef6c35;
  font-size: 1.125rem;
  font-weight: 700;
  text-align: center;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.35em;
}

nav a:focus-visible {
  border-radius: 0.25rem;
  outline: 0.2rem solid #ef6c35;
  outline-offset: 0.15rem;
}

.content-page {
  width: min(100%, 46rem);
  min-height: 100vh;
  align-items: stretch;
  justify-content: flex-start;
  margin: 0 auto;
  padding-block: clamp(2rem, 8vw, 6rem);
}

.page-header {
  padding-bottom: 0;
}

.back-link {
  color: #ef6c35;
  font-weight: 650;
  text-underline-offset: 0.25em;
}

.eyebrow {
  margin: 3rem 0 0.5rem;
  color: #ef6c35;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
}

.page-header h1 {
  margin: 0;
}

.page-header > p:last-child {
  max-width: 36rem;
  margin: 1rem 0 0;
  color: #333;
  font-size: 1rem;
}

section {
  padding-top: 2rem;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
}

.link-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid #e0e0e0;
  list-style: none;
}

.link-list li {
  border-bottom: 1px solid #e0e0e0;
}

.link-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  color: #ef6c35;
  text-decoration: none;
}

.link-list span {
  font-weight: 600;
}

.writing-page .link-list a,
.oss-page .link-list a {
  color: #333;
}

.writing-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
}

.writing-titles {
  display: grid;
  gap: 0.25rem;
}

.writing-titles a {
  padding: 0;
}

.writing-titles .english-title {
  color: #555;
  font-size: 0.875rem;
  font-weight: 400;
}

.activity-type {
  display: inline-block;
  min-width: 2.75rem;
  margin-right: 0.35rem;
  padding: 0.1rem 0.3rem;
  border: 1px solid currentcolor;
  border-radius: 0.25rem;
  font-size: 0.6875rem;
  line-height: 1.2;
  text-align: center;
}

.activity-type-pr,
.activity-type-issue {
  color: #333;
}

.link-list small,
.link-list time {
  color: #555;
  font-size: 0.8125rem;
  text-align: right;
}

.link-list time {
  white-space: nowrap;
}

.link-list a:hover span,
.back-link:hover {
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

.link-list a:focus-visible,
.back-link:focus-visible {
  border-radius: 0.25rem;
  outline: 0.2rem solid #ef6c35;
  outline-offset: 0.25rem;
}

@media (min-width: 40rem) {
  nav {
    display: flex;
    width: auto;
    gap: 2rem;
  }

  nav a {
    white-space: nowrap;
  }
}

@media (max-width: 30rem) {
  .link-list a {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.25rem;
  }

  .link-list small,
  .link-list time {
    text-align: left;
  }

  .writing-item {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  nav a {
    transition: color 150ms ease;
  }
}