/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Obsidian Dark Theme */
  --color-bg: #1e1e1e;
  --color-surface: #252525;
  --color-card: #2d2d2d;
  --color-text: #dcddde;
  --color-muted: #888;
  --color-accent: #7c3aed;
  --color-accent2: #a78bfa;
  --color-border: #3a3a3a;
  --color-code-bg: #2a2a2a;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --max-width: 720px;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  margin-bottom: 2.5rem;
  background: var(--color-surface);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent2);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-title:hover { color: var(--color-accent); }

.site-nav a {
  color: var(--color-muted);
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: 0.95rem;
  transition: color 0.15s;
}

.site-nav a:first-child { margin-left: 0; }
.site-nav a:hover { color: var(--color-accent2); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  margin-top: 3rem;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.site-footer a { 
  color: var(--color-muted);
  transition: color 0.15s;
}
.site-footer a:hover { color: var(--color-accent2); }

/* Home / Post List */
.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.75rem;
  color: var(--color-text);
}

.post-list {
  list-style: none;
}

.post-list-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 0;
}

.post-list-item:first-child { padding-top: 0; }

.post-list-item h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.post-list-item h2 a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.15s;
}

.post-list-item h2 a:hover { color: var(--color-accent2); }

.post-list-meta {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.post-list-excerpt {
  margin-top: 0.4rem;
  font-size: 0.95rem;
  color: var(--color-muted);
}

/* Post */
.post-header {
  margin-bottom: 2rem;
}

.post-title {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.post-meta {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.post-meta .category {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.2em 0.5em;
  font-size: 0.8rem;
  color: var(--color-accent2);
}

/* Post Content */
.post-content { max-width: 100%; }

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  margin-top: 1.75rem;
  margin-bottom: 0.6rem;
  line-height: 1.3;
  color: var(--color-text);
}

.post-content h2 { font-size: 1.35rem; }
.post-content h3 { font-size: 1.15rem; }
.post-content h4 { font-size: 1rem; }

.post-content p { margin-bottom: 1rem; }

.post-content a { 
  color: var(--color-accent2);
  transition: opacity 0.15s;
}
.post-content a:hover { opacity: 0.8; }

.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(--color-accent);
  padding-left: 1rem;
  color: var(--color-muted);
  margin: 1rem 0;
  background: var(--color-card);
  padding: 0.5rem 1rem;
  border-radius: 0 4px 4px 0;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-code-bg);
  color: var(--color-accent2);
  padding: 0.15em 0.35em;
  border-radius: 3px;
}

pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  line-height: 1.6;
}

pre code {
  background: none;
  color: var(--color-text);
  padding: 0;
  font-size: inherit;
}

/* Images */
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 1rem 0;
  border: 1px solid var(--color-border);
}

/* Post Navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.post-nav a { 
  color: var(--color-accent2);
  text-decoration: none;
  transition: opacity 0.15s;
}
.post-nav a:hover { opacity: 0.8; }
.post-nav .next { margin-left: auto; text-align: right; }

/* About / Static pages */
.page-content h1,
.page-content h2,
.page-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.page-content p { margin-bottom: 1rem; }
.page-content a { 
  color: var(--color-accent2);
  transition: opacity 0.15s;
}
.page-content a:hover { opacity: 0.8; }

.page-content ul, .page-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.page-content code {
  color: var(--color-accent2);
}

/* Tables */
.post-content table,
.page-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.post-content table th,
.page-content table th {
  background: var(--color-card);
  color: var(--color-text);
  padding: 0.75rem;
  text-align: left;
  border: 1px solid var(--color-border);
  font-weight: 600;
}

.post-content table td,
.page-content table td {
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.post-content table tr:nth-child(even),
.page-content table tr:nth-child(even) {
  background: var(--color-code-bg);
}

/* Responsive */
@media (max-width: 600px) {
  .post-title { font-size: 1.4rem; }
  .post-nav { flex-direction: column; }
  .post-nav .next { text-align: left; margin-left: 0; }
  .site-nav a { margin-left: 0.75rem; }
}