:root {
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --bg: #ffffff;
  --accent: #1a5fb4;
  --border: #e5e5e5;
  --max-width: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8e8e8;
    --text-muted: #9a9a9a;
    --bg: #161616;
    --accent: #7cb0ea;
    --border: #333333;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

.site-header,
main,
.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  padding-top: 2rem;
  padding-bottom: 2.5rem;
}

.site-header nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-name {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 1.25rem;
}

.nav-links a:hover {
  color: var(--accent);
}

main {
  min-height: 60vh;
}

a {
  color: var(--accent);
}

h1, h2, h3, h4 {
  line-height: 1.25;
}

h1 {
  font-size: 1.85rem;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

blockquote {
  margin: 1.5rem 0;
  padding-left: 1.25rem;
  border-left: 3px solid var(--border);
  color: var(--text-muted);
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

code {
  font-size: 0.9em;
}

iframe {
  max-width: 100%;
}

/* Post pages */
.post-header time {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.post-header {
  margin-bottom: 2rem;
}

.post-back {
  margin-top: 3rem;
}

/* Writing index */
.year-heading {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

ul.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

ul.post-list li {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  padding: 0.3rem 0;
}

ul.post-list time {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  min-width: 4.5rem;
}

ul.post-list a {
  text-decoration: none;
}

ul.post-list a:hover {
  text-decoration: underline;
}

/* Home */
.portrait {
  border-radius: 6px;
  margin: 1.5rem 0;
}

/* Projects */
.project {
  margin-bottom: 2rem;
}

.project h3 {
  margin-bottom: 0.25rem;
}

.project p {
  margin-top: 0.25rem;
}

.site-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--text-muted);
}

.site-footer a:hover {
  color: var(--accent);
}