/* ============================================================================
   Sif Blog — Obsidian Sync Theme
   ============================================================================ */

:root {
  --color-bg: #0f172a;
  --color-bg-alt: #1e293b;
  --color-text: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-accent: #a855f7;
  --color-accent-dark: #7c3aed;
  --color-border: #334155;
  --font-sans: Inter, system-ui, -apple-system, sans-serif;
  --font-mono: JetBrains Mono, Fira Code, monospace;
  --radius: 12px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 50;
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.025em;
}

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

.nav-links {
  display: none;
  gap: 1.5rem;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  background: transparent;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.theme-toggle:hover {
  background-color: var(--color-bg-alt);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.theme-toggle .sun-icon { display: none; }
.theme-toggle .moon-icon { display: block; }
.dark-mode .theme-toggle .sun-icon { display: block; }
.dark-mode .theme-toggle .moon-icon { display: none; }

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 0 2rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  margin: 0 0 1rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-accent), #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
  max-width: 42rem;
  margin: 0 auto;
}

/* Section list */
.section-list {
  margin-top: 2rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Posts grid */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Post card */
.post-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--color-accent);
}

.post-emoji {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  display: block;
}

.post-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.post-title a {
  color: var(--color-text);
  text-decoration: none;
}

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

.post-date {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  display: block;
  margin-bottom: 0.75rem;
}

.post-excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin: 0 0 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.post-tags a {
  font-size: 0.75rem;
  color: var(--color-accent);
  text-decoration: none;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  padding: 0.125rem 0.5rem;
  transition: all 0.2s;
}

.post-tags a:hover {
  background: var(--color-accent);
  color: var(--color-text);
}

/* Single post */
.post {
  margin-top: 2rem;
}

.post-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.post-emoji-large {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.post-title {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.post-meta-date {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  display: block;
}

.post-lead {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin: 0 0 1rem;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

.post-content {
  font-size: 1.125rem;
  line-height: 1.8;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.post-content h1 { font-size: 1.875rem; border-bottom: 1px solid var(--color-border); padding-bottom: 0.5rem; }
.post-content h2 { font-size: 1.5rem; }
.post-content h3 { font-size: 1.25rem; }
.post-content h4 { font-size: 1.125rem; }

.post-content p {
  margin-bottom: 1.25rem;
}

.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: rgba(168, 85, 247, 0.4);
  text-underline-offset: 2px;
}

.post-content code {
  background: var(--color-bg-alt);
  color: #c084fc;
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.875em;
}

.post-content pre {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.post-content pre code {
  background: transparent;
  color: var(--color-text);
  padding: 0;
}

.post-content blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 1rem 0;
}

/* Pagination */
.pager-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
}

.pager-link:hover {
  text-decoration: underline;
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.copyright {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

.copyright a {
  color: var(--color-accent);
  text-decoration: none;
}

.disclaimer {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  margin: 0;
}

/* Mobile responsive */
@media (min-width: 640px) {
  .nav-links {
    display: flex;
  }
  
  .hero-title {
    font-size: 4rem;
  }
}

/* Prose class for markdown content */
.prose {
  max-width: none;
}

.prose p {
  margin-bottom: 1.5rem;
}