/* ============================================
   ERDPULS — Dark Theme CSS
   Tiefgründig & ruhig
   ============================================ */

:root {
  --color-bg:          #0d1117;
  --color-surface:     #161b22;
  --color-surface-2:   #1c2128;
  --color-border:      #21262d;
  --color-text:        #e6edf3;
  --color-muted:       #8b949e;
  --color-accent:      #d4a843;
  --color-accent-dim:  #9a7a2e;
  --color-link:        #79c0ff;
  --color-danger:      #f85149;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Source Serif 4', Georgia, serif;
  --font-mono:    'JetBrains Mono', monospace;

  --max-width: 720px;
  --wide-width: 1100px;
  --radius: 6px;
  --transition: 0.2s ease;
}

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

html { font-size: 18px; scroll-behavior: smooth; }

body {
  background-color: var(--color-bg);
  background-image:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  min-height: 100vh;
}

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

img { max-width: 100%; height: auto; display: block; }

/* ============ HEADER ============ */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 2rem;
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
}

.header-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.logo-mark {
  color: var(--color-accent);
  font-size: 1.1rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

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

.nav-cta {
  background: var(--color-accent);
  color: var(--color-bg) !important;
  padding: 0.4rem 1rem;
  border-radius: var(--radius);
  font-weight: 500;
  transition: background var(--transition);
}

.nav-cta:hover { background: var(--color-accent-dim) !important; }

.header-tagline {
  max-width: var(--wide-width);
  margin: 0.5rem auto 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0 2rem;
}

/* ============ HERO ============ */
.home-hero {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 5rem 2rem 3rem;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.hero-title::after {
  content: '';
  display: block;
  width: 3rem;
  height: 2px;
  background: var(--color-accent);
  margin: 1rem auto 0;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-muted);
  max-width: 500px;
  margin: 0 auto;
  font-style: italic;
}

/* ============ POST FEED ============ */
.post-feed { padding: 3rem 2rem; }

.post-feed-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* ============ POST CARD ============ */
.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.post-card:hover {
  border-color: var(--color-accent-dim);
  transform: translateY(-2px);
}

.post-card-image-link { display: block; overflow: hidden; aspect-ratio: 16/9; }
.post-card-image { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.post-card:hover .post-card-image { transform: scale(1.03); }

.post-card-content { padding: 1.5rem; }

.post-card-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.6rem;
}

.post-card-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

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

.post-card-excerpt {
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-muted);
}

/* ============ TAG ARCHIVE ============ */
.tag-archive { padding: 3rem 2rem; }

.tag-header {
  max-width: var(--wide-width);
  margin: 0 auto 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.tag-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.tag-description {
  color: var(--color-muted);
  font-style: italic;
}

/* ============ SINGLE POST ============ */
.single-post {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

.post-header { margin-bottom: 3rem; }

.post-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  display: inline-block;
  margin-bottom: 1rem;
}

.post-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
}

.post-feature-image {
  margin: 0 -2rem 2rem;
  border-radius: var(--radius);
  overflow: hidden;
}

.post-feature-image img { width: 100%; }
.post-feature-image figcaption {
  font-size: 0.8rem;
  color: var(--color-muted);
  text-align: center;
  padding: 0.5rem 1rem;
  font-style: italic;
}

/* ============ POST CONTENT ============ */
.gh-content { color: var(--color-text); }

.gh-content h2, .gh-content h3, .gh-content h4 {
  font-family: var(--font-display);
  color: var(--color-text);
  margin: 2.5rem 0 1rem;
  line-height: 1.25;
}

.gh-content h2 { font-size: 1.6rem; }
.gh-content h3 { font-size: 1.3rem; }

.gh-content p { margin-bottom: 1.5rem; }

.gh-content a { color: var(--color-link); text-decoration: underline; text-underline-offset: 3px; }

.gh-content blockquote {
  border-left: 3px solid var(--color-accent);
  margin: 2rem 0;
  padding: 0.5rem 0 0.5rem 1.5rem;
  color: var(--color-muted);
  font-style: italic;
  font-size: 1.05rem;
}

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

.gh-content li { margin-bottom: 0.4rem; }

.gh-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--color-accent);
}

.gh-content pre {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
}

.gh-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text);
  font-size: 0.9rem;
}

.gh-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 3rem 0;
}

.gh-content img {
  border-radius: var(--radius);
  margin: 1.5rem 0;
}

.gh-content figure { margin: 2rem 0; }
.gh-content figcaption {
  font-size: 0.82rem;
  color: var(--color-muted);
  text-align: center;
  margin-top: 0.5rem;
  font-style: italic;
}

/* Ghost callout card */
.gh-content .kg-callout-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.gh-content .kg-callout-emoji { font-size: 1.3rem; }

/* ============ POST FOOTER ============ */
.post-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.tag-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  transition: border-color var(--transition), color var(--transition);
}

.tag-pill:hover { border-color: var(--color-accent); color: var(--color-accent); }

.post-subscribe {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
}

.post-subscribe p {
  color: var(--color-muted);
  margin-bottom: 1rem;
  font-family: var(--font-display);
  font-style: italic;
}

.subscribe-btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-bg);
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  transition: background var(--transition);
}

.subscribe-btn:hover { background: var(--color-accent-dim); color: var(--color-bg); }

/* ============ PAGINATION ============ */
.pagination {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.pagination a {
  border: 1px solid var(--color-border);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
  color: var(--color-muted);
  transition: border-color var(--transition), color var(--transition);
}

.pagination a:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ============ FOOTER ============ */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 2rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.footer-copy {
  color: var(--color-muted);
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer-copy a { color: var(--color-muted); }
.footer-copy a:hover { color: var(--color-accent); }

/* ============ ERROR PAGE ============ */
.error-page { text-align: center; }
.error-page .post-title { font-size: 6rem; color: var(--color-accent); margin-bottom: 1rem; }

/* ============ RESPONSIVE ============ */
@media (max-width: 640px) {
  .site-header { padding: 1rem; }
  .header-tagline { padding: 0 1rem; }
  .post-feed { padding: 2rem 1rem; }
  .post-feed-inner { grid-template-columns: 1fr; }
  .single-post { padding: 2rem 1rem 4rem; }
  .site-nav { gap: 1rem; }
  .home-hero { padding: 3rem 1rem 2rem; }
  .post-feature-image { margin: 0 -1rem 2rem; }
}