:root {
  --primary: #2563eb;
  --secondary: #0f172a;
  --muted: #6b7280;
  --bg-soft: #f8fafc;
  --border: #e5e7eb;
}
body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen;
  background: linear-gradient(to bottom, #f8fafc 0%, #ffffff 40%);
  color: #1f2937;
  max-width: 920px;
  margin: 0 auto;
  padding: 0 20px 60px;
  line-height: 1.65;
}
header {
  padding: 32px 0 20px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
header h1 {
  font-size: 2.6rem;
  margin-bottom: 12px;
  color: var(--secondary);
}
header p {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 720px;
}
h2 {
  font-size: 1.5rem;
  margin-top: 56px;
  margin-bottom: 16px;
  color: var(--secondary);
  position: relative;
}
h2::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 8px;
  height: 26px;
  width: 4px;
  background: var(--primary);
  border-radius: 2px;
}
p,
li {
  font-size: 1rem;
}
ul {
  padding-left: 20px;
}
ul > li {
  margin-left: 20px;
}
a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}
a:hover {
  text-decoration: underline;
}
blockquote {
  background: var(--bg-soft);
  border-left: 4px solid var(--primary);
  padding: 8px 16px;
  margin: 28px 0;
  border-radius: 6px;
  color: #334155;
  font-style: italic;
}
.card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 26px;
  margin: 24px 0;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
}
footer {
  margin-top: 80px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
  text-align: center;
}
.meta {
  color: #6b7280;
  font-size: 0.95rem;
  margin-bottom: 32px;
}
.post-tags {
  margin-top: 1.5rem;
}
.post-tags .tag {
  display: inline-block;
  margin-right: 0.5rem;
  padding: 0.25rem 0.6rem;
  background: #eef2ff;
  color: #3730a3;
  border-radius: 6px;
  font-size: 0.85rem;
  text-decoration: none;
}
.post-tags .tag:hover {
  background: #c7d2fe;
}
.post-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 2.5rem;
}
.post-footer {
  margin-top: 2.5rem;
  font-size: 0.9rem;
  color: #4b5563;
}
.post-footer a {
  color: #2563eb;
  font-weight: 500;
  text-decoration: none;
}
.post-footer a:hover {
  text-decoration: underline;
}
pre {
  background: #f4f4f4;
  border: 1px solid #ddd;
  border-left: 3px solid #f36d33;
  color: #666;
  font-family:
    Consolas, "Andale Mono WT", "Andale Mono", "Lucida Console",
    "Lucida Sans Typewriter", "DejaVu Sans Mono",
    "Bitstream Vera Sans Mono", "Liberation Mono", "Nimbus Mono L",
    Monaco, "Courier New", Courier, monospace;
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 1.6em;
  max-width: 100%;
  overflow: auto;
  padding: 1em 1.5em;
  display: block;
  word-wrap: break-word;
  white-space: pre-wrap;
}
p > code,
li > code,
dd > code,
td > code {
  background: #ffeff0;
  padding: 0.1rem 0.3rem 0.2rem;
  border-radius: 0.2rem;
  font-size: inherit;
}
.hidden {
  display: none;
}