:root {
  --bg: #1e1e1e;
  --panel: #121212;
  --text: #e2e2e2;
  --muted: #919191;
  --accent: #ffc107;
  --link: #569cd6;
  --border: #2a2a2a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;
  font-size: 14px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.site {
  max-width: 760px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

/* header */

header h1 {
  font-size: 1.3em;
  font-weight: 500;
  margin: 0 0 4px;
  color: var(--accent);
}

.sub {
  color: var(--muted);
  margin: 0 0 20px;
  font-size: 0.85em;
}

.nav {
  display: flex;
  gap: 20px;
}

.nav a {
  color: var(--link);
  text-decoration: none;
  font-size: 0.82em;
  border: 1px solid var(--border);
  padding: 2px 7px;
}

.nav a:hover {
  text-decoration: underline;
}

body[data-key-state="g"] .nav a[data-key^="g"] {
  color: var(--accent);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

/* tabs */

.tabs {
  margin: 0 0 36px;
}

.tab {
  display: none;
}

.tab:target {
  display: block;
}

.tabs #about {
  display: block;
}

.tabs:has(#blog:target) #about {
  display: none;
}

.tabs:has(#about:target) #about {
  display: block;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 18px 20px;
}

hr.sec {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0 28px;
}

/* about content */

section#about p {
  margin: 0 0 8px;
}

section#about ul {
  list-style: none;
  padding: 0;
  margin: 10px 0;
}

section#about ul li::before {
  content: "- ";
  color: var(--muted);
}

section#about h3 {
  font-size: 0.92em;
  font-weight: 500;
  color: var(--link);
  margin: 20px 0 8px;
}

/* section header (blog list) */

h2 {
  font-size: 0.9em;
  font-weight: 500;
  margin: 0 0 14px;
  color: var(--muted);
  text-transform: lowercase;
}

/* blog list */

.lst {
  display: flex;
  flex-direction: column;
}

.row {
  display: block;
  text-decoration: none;
  color: var(--text);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.row:last-child {
  border-bottom: none;
}

.row:hover .tit {
  color: var(--accent);
}

.tit {
  display: block;
  font-size: 0.92em;
  transition: color 0.15s;
}

.dat {
  display: block;
  font-size: 0.75em;
  color: var(--muted);
  margin-top: 2px;
}

.sum {
  display: block;
  font-size: 0.78em;
  color: var(--muted);
  margin-top: 2px;
  line-height: 1.5;
}

.new {
  font-size: 0.6em;
  color: var(--accent);
  vertical-align: super;
  margin-left: 2px;
}

/* blog post */

.brd {
  font-size: 0.78em;
  color: var(--muted);
  margin: 0 0 20px;
  letter-spacing: 0.05em;
}

.meta {
  color: var(--muted);
  font-size: 0.78em;
  margin: 6px 0 28px;
  line-height: 1.7;
}

.tags {
  color: var(--link);
}

.back {
  color: var(--link);
  text-decoration: none;
  font-size: 0.85em;
}

.back:hover {
  text-decoration: underline;
}

/* article */

article {
  margin: 0 0 40px;
}

article.panel {
  padding: 22px 24px;
}

article h1 {
  font-size: 1.15em;
  font-weight: 500;
  color: var(--accent);
  margin: 0 0 12px;
}

article h2 {
  font-size: 1.05em;
  font-weight: 500;
  color: var(--accent);
  margin: 28px 0 10px;
}

article h3 {
  font-size: 0.92em;
  font-weight: 500;
  color: var(--link);
  margin: 24px 0 8px;
}

article p {
  margin: 12px 0;
}

article ul, article ol {
  padding-left: 18px;
  margin: 8px 0;
}

article li {
  margin: 2px 0;
}

article a {
  color: var(--link);
}

article a:hover {
  opacity: 0.8;
}

article img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  margin: 12px 0;
}

article svg {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 760 / 380;
  border: 1px solid var(--border);
  margin: 12px 0;
  background: #f8fafc;
}

article code {
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 2px;
  font-size: 0.88em;
}

article pre {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 12px 14px;
  overflow-x: auto;
  font-size: 0.82em;
  line-height: 1.45;
  margin: 12px 0;
}

article pre code {
  background: none;
  padding: 0;
  font-size: 1em;
}

article blockquote {
  margin: 12px 0;
  padding: 8px 14px;
  border-left: 2px solid var(--link);
  background: var(--panel);
  color: var(--muted);
}

article blockquote p {
  margin: 2px 0;
}

article blockquote strong {
  color: var(--text);
}

article hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

article table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 0.8em;
}

article div[role="region"] {
  overflow-x: auto;
  margin: 12px 0;
}

article table th,
article table td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
  vertical-align: top;
}

article .right {
  text-align: right;
}

article table th {
  background: var(--panel);
  color: var(--accent);
  font-weight: 500;
}

article table tr:nth-child(even) {
  background: var(--panel);
}

article figure {
  margin: 16px 0;
  overflow-x: auto;
}

article figcaption {
  font-size: 0.75em;
  color: var(--muted);
  margin-top: 4px;
}

/* footer */

footer {
  margin: 36px 0;
}

.links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8em;
  border: 1px solid var(--border);
  padding: 2px 7px;
}

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

.nav a,
.links a {
  transition: color 0.12s ease, border-color 0.12s ease, background 0.12s ease;
}

/* responsive */

@media (max-width: 600px) {
  .site {
    padding: 32px 16px 60px;
  }

  .nav {
    gap: 14px;
  }

  .links {
    gap: 12px;
  }
}

/* focus */

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

/* scrollbar */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}