:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0d9488;
  --accent-dark: #0f766e;
  --border: #e2e8f0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
.container { max-width: 860px; margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}
.brand { text-decoration: none; display: flex; align-items: center; gap: 0.4rem; }
.brand-main { font-size: 1.35rem; font-weight: 800; color: #0f172a; }
.brand-badge {
  background: #ccfbf1;
  color: #0f766e;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  text-transform: uppercase;
}
.site-nav { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.site-nav a { text-decoration: none; color: var(--muted); font-weight: 600; font-size: 0.92rem; }
.site-nav a:hover { color: var(--accent); }
.btn-observatory {
  background: linear-gradient(135deg, #0d9488, #0284c7);
  color: #fff !important;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.82rem !important;
  font-weight: 700 !important;
}

/* Main Content */
.main-content { padding: 2.5rem 1.25rem; min-height: 75vh; }
.hero-box {
  background: linear-gradient(135deg, #ecfdf5 0%, #eff6ff 100%);
  border: 1px solid #a7f3d0;
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2.25rem;
}
.hero-box h1 { font-size: 1.75rem; margin-bottom: 0.5rem; color: #065f46; }
.hero-box p { color: #1e293b; }

/* Post Cards */
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.post-card:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06); }
.post-meta { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.4rem; display: flex; gap: 0.75rem; align-items: center; }
.post-category { background: #f1f5f9; color: #0f766e; font-weight: 700; padding: 0.15rem 0.55rem; border-radius: 6px; }
.post-card h2 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.post-card h2 a { text-decoration: none; color: var(--text); }
.post-card h2 a:hover { color: var(--accent); }
.read-more { display: inline-block; margin-top: 0.6rem; color: var(--accent); font-weight: 700; text-decoration: none; font-size: 0.9rem; }

/* Single Article */
.post-article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.25rem;
}
.post-title { font-size: 1.95rem; line-height: 1.25; margin-bottom: 0.6rem; }
.post-subtitle { color: var(--muted); font-size: 1.05rem; margin-bottom: 1.5rem; }
.post-body h2 { margin-top: 2rem; margin-bottom: 0.75rem; font-size: 1.4rem; color: #0f172a; border-bottom: 2px solid #f1f5f9; padding-bottom: 0.3rem; }
.post-body h3 { margin-top: 1.5rem; margin-bottom: 0.5rem; font-size: 1.15rem; }
.post-body p, .post-body ul, .post-body ol { margin-bottom: 1.15rem; }
.post-body ul, .post-body ol { padding-left: 1.4rem; }
.post-body blockquote {
  border-left: 4px solid var(--accent);
  background: #f0fdfa;
  padding: 0.85rem 1.1rem;
  border-radius: 0 8px 8px 0;
  margin-bottom: 1.25rem;
}
.post-body table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.92rem; }
.post-body th, .post-body td { border: 1px solid var(--border); padding: 0.65rem 0.85rem; text-align: left; }
.post-body th { background: #f8fafc; font-weight: 700; }

/* Observatory CTA Box */
.observatory-cta-box {
  margin-top: 2.5rem;
  background: linear-gradient(135deg, #f0fdfa 0%, #e0f2fe 100%);
  border: 1.5px solid #5eead4;
  border-radius: 14px;
  padding: 1.5rem;
}
.observatory-cta-box h3 { margin-bottom: 0.4rem; color: #0f766e; }
.cta-buttons { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }
.btn-primary {
  background: #0d9488; color: #fff; text-decoration: none; padding: 0.55rem 1.1rem; border-radius: 8px; font-weight: 700; font-size: 0.9rem;
}
.btn-secondary {
  background: #ffffff; color: #0f766e; border: 1px solid #0d9488; text-decoration: none; padding: 0.55rem 1.1rem; border-radius: 8px; font-weight: 700; font-size: 0.9rem;
}

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: #fff; padding: 2rem 0; margin-top: 3rem; font-size: 0.88rem; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }