:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --border: #30363d;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem;
}

header {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
  margin-bottom: 2rem;
}

.header-banner {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.header-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-title {
  color: var(--accent);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  font-size: 0.95rem;
}

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

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

.tagline {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

h1 { font-size: 2rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.4rem; margin: 1rem 0 0.5rem; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

time {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.intro {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

/* Post list */
.post-list { display: flex; flex-direction: column; gap: 2rem; }

.post-summary {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}

.post-cover {
  width: 100%;
  max-height: 300px;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 0.75rem;
}

/* Single post */
.post-hero {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: 8px;
  margin: 1rem 0;
}

.tags { margin: 0.5rem 0; }
.tag {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  font-size: 0.8rem;
  margin-right: 0.4rem;
  color: var(--text-muted);
}

/* YouTube embeds */
.youtube-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  margin: 1.5rem 0;
}

.youtube-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
}

.content { margin-top: 1.5rem; }
.content p { margin-bottom: 1rem; }
.content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 1rem 0;
}

/* Post navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

.post-nav-next { margin-left: auto; }

/* Tag listing page */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.tag-pill {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
  color: var(--text);
}

.tag-pill:hover { border-color: var(--accent); text-decoration: none; }

.tag-count {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-left: 0.25rem;
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}