:root {
  --bg:       #0d1117;
  --surface:  #161b22;
  --border:   #30363d;
  --green:    #3fb950;
  --dim:      #8b949e;
  --text:     #c9d1d9;
  --accent:   #58a6ff;
  --red:      #f85149;
  --font:     'JetBrains Mono', 'Fira Code', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.92rem;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── nav ── */
header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
}
nav {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-title {
  color: var(--green);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
}
.site-title:hover { text-decoration: underline; }
.nav-links a {
  color: var(--dim);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 0.85rem;
}
.nav-links a:hover { color: var(--text); }

/* ── main ── */
main {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 2rem;
  flex: 1;
}

/* ── home ── */
.hero { margin-bottom: 3rem; }
.hero .prompt { color: var(--green); margin-bottom: 0.5rem; font-size: 0.8rem; }
.hero h1 { font-size: 1.6rem; font-weight: 600; color: var(--text); margin-bottom: 0.75rem; }
.hero p { color: var(--dim); max-width: 560px; }

.section-title {
  color: var(--dim);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
  margin-bottom: 1.5rem;
}

/* ── post list ── */
.post-list { list-style: none; }
.post-list li {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.post-list li:last-child { border-bottom: none; }
.post-list .date { color: var(--dim); font-size: 0.8rem; white-space: nowrap; }
.post-list a { color: var(--accent); text-decoration: none; }
.post-list a:hover { text-decoration: underline; }
.post-list .excerpt { color: var(--dim); font-size: 0.82rem; margin-top: 0.2rem; }

/* ── post ── */
.post-header { margin-bottom: 2.5rem; }
.post-header .prompt { color: var(--green); font-size: 0.78rem; margin-bottom: 1rem; }
.post-header h1 { font-size: 1.4rem; font-weight: 600; margin-bottom: 0.5rem; }
.post-header time { color: var(--dim); font-size: 0.8rem; }
.tags { margin-top: 0.6rem; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tag {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--dim);
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
}

.post-content { border-left: 2px solid var(--border); padding-left: 1.5rem; }
.post-content h2 { color: var(--text); margin: 2rem 0 0.75rem; font-size: 1.1rem; }
.post-content h3 { color: var(--dim); margin: 1.5rem 0 0.5rem; font-size: 0.95rem; }
.post-content p { margin-bottom: 1rem; }
.post-content a { color: var(--accent); }
.post-content code {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.85em;
}
.post-content pre {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1rem 1.25rem;
  border-radius: 6px;
  overflow-x: auto;
  margin: 1rem 0;
}
.post-content pre code { background: none; border: none; padding: 0; }
.post-content ul, .post-content ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.post-content li { margin-bottom: 0.3rem; }
.post-content blockquote {
  border-left: 3px solid var(--green);
  padding-left: 1rem;
  color: var(--dim);
  margin: 1rem 0;
}

.back-link { display: inline-block; margin-top: 2.5rem; color: var(--dim); text-decoration: none; font-size: 0.85rem; }
.back-link:hover { color: var(--text); }

/* ── footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 2rem;
  text-align: center;
  color: var(--dim);
  font-size: 0.78rem;
}
footer a { color: var(--dim); }
footer a:hover { color: var(--text); }

/* ── responsive ── */
@media (max-width: 600px) {
  main, header, footer { padding-left: 1.25rem; padding-right: 1.25rem; }
  .post-list li { flex-direction: column; gap: 0.2rem; }
}

/* ── category badges ── */
.cat-tag {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
}
.cat-tag:hover {
  background: var(--accent);
  color: var(--bg);
}

/* ── category nav: wrap on small screens ── */
@media (max-width: 780px) {
  .nav-links { display: flex; flex-wrap: wrap; gap: 0.3rem; }
  .nav-links a { margin-left: 0; }
}

/* ── avatar ── */
.hero-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.hero-title h1 { margin-bottom: 0; }
.avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--green);
  object-fit: cover;
  flex-shrink: 0;
}

/* ── social links ── */
.links {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--dim);
}
.links .prompt { color: var(--green); margin-right: 0.4rem; }
.links a { color: var(--dim); text-decoration: none; }
.links a:hover { color: var(--text); }