:root {
  --bg: #090b10;
  --panel: #10141c;
  --line: #242b38;
  --text: #e8edf5;
  --muted: #8b95a8;
  --accent: #1649ff;
  --accent-2: #3d7bff;
  --code-bg: #0c1018;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.mark {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  color: var(--accent-2);
  text-decoration: none;
}

.mark:hover {
  color: var(--text);
}

nav {
  display: flex;
  gap: 1.25rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

nav a:hover,
nav a[aria-current="page"] {
  color: var(--text);
}

main {
  flex: 1;
  width: min(720px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 3rem 0 3.5rem;
}

.page-header {
  margin-bottom: 2.5rem;
}

.page-header h1 {
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0.35rem 0 0.75rem;
}

.kicker {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.75rem;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0;
}

.lede {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
  max-width: 38rem;
  margin: 0;
}

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-list li {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0;
}

.post-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.post-list a {
  color: inherit;
  text-decoration: none;
  display: block;
}

.post-list a:hover .post-title {
  color: var(--accent-2);
}

.post-title {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 0.45rem;
  line-height: 1.3;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  margin: 0 0 0.65rem;
}

.post-excerpt {
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.55;
  margin: 0;
}

.back {
  display: inline-block;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  margin-bottom: 1.75rem;
}

.back:hover {
  color: var(--text);
}

.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.article-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 0.85rem;
}

.prose {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
}

.prose > *:first-child {
  margin-top: 0;
}

.prose h2 {
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin: 2.25rem 0 0.75rem;
  line-height: 1.25;
}

.prose h3 {
  font-size: 1.1rem;
  margin: 1.75rem 0 0.5rem;
}

.prose p {
  margin: 0 0 1.1rem;
}

.prose a {
  color: var(--accent-2);
}

.prose a:hover {
  text-decoration-thickness: 2px;
}

.prose ul,
.prose ol {
  margin: 0 0 1.1rem;
  padding-left: 1.25rem;
}

.prose li {
  margin-bottom: 0.35rem;
}

.prose li::marker {
  color: var(--accent-2);
}

.prose blockquote {
  margin: 1.5rem 0;
  padding: 0.85rem 1.1rem;
  border-left: 3px solid var(--accent);
  background: var(--panel);
  color: var(--muted);
}

.prose blockquote p {
  margin: 0;
}

.prose pre {
  margin: 1.25rem 0;
  padding: 1rem 1.1rem;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  overflow-x: auto;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.85rem;
  line-height: 1.55;
}

.prose code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.88em;
}

.prose :not(pre) > code {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0.3rem;
  padding: 0.1em 0.35em;
}

.about-panel {
  margin-top: 2.5rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
}

.about-panel h2 {
  font-size: 1rem;
  margin: 0 0 1rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 500;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.about-panel ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.about-panel li {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  font-size: 0.92rem;
}

.about-panel span {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--accent-2);
  font-size: 0.75rem;
}

footer {
  padding: 1.25rem 1.5rem 2rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--line);
}

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

footer a:hover {
  color: var(--text);
}

@media (max-width: 720px) {
  main {
    padding-top: 2rem;
  }

  .about-panel ol {
    grid-template-columns: 1fr;
  }
}