:root {
  --bg: #0b0d12;
  --panel: #11141b;
  --text: #e6e9ef;
  --muted: #b3b9c6;
  --brand: #5b9cff;
  --accent: #7ee787;
  --border: #1b2230;
  --transition: all 0.2s ease;
}

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

html { 
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 800px at 80% -10%, rgba(91,156,255,0.2), transparent 40%),
              radial-gradient(800px 600px at 10% -10%, rgba(126,231,135,0.15), transparent 40%),
              var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  padding-bottom: 2rem;
}

.container {
  max-width: 920px;
  padding: 0 24px;
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 13, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  height: 72px;
  gap: 24px;
}

.brand { 
  color: var(--text); 
  text-decoration: none; 
  font-weight: 700; 
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  transition: var(--transition);
}

.brand:hover {
  color: var(--brand);
}

.nav { 
  display: flex; 
  gap: 20px; 
  flex-wrap: wrap;
  align-items: center;
}

.nav a { 
  color: var(--muted); 
  text-decoration: none; 
  font-weight: 500; 
  font-size: 0.9rem;
  transition: var(--transition);
  padding: 4px 0;
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand);
  transition: width 0.3s ease;
}

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

.nav a:hover::after {
  width: 100%;
}

/* Main Content */
main {
  padding: 40px 0;
}

.post { 
  background: linear-gradient(180deg, rgba(17,20,27,0.95), rgba(17,20,27,0.85)); 
  padding: 48px 40px; 
  border: 1px solid var(--border); 
  border-radius: 20px; 
  margin: 24px 0; 
  box-shadow: 0 20px 60px rgba(0,0,0,0.4),
              0 0 1px rgba(255,255,255,0.05);
  transition: var(--transition);
}

.post:hover {
  box-shadow: 0 25px 70px rgba(0,0,0,0.5),
              0 0 1px rgba(255,255,255,0.08);
}

h1 { 
  font-size: 2.5rem; 
  line-height: 1.2; 
  margin: 0 0 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text), var(--muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 { 
  font-size: 1.6rem; 
  margin: 48px 0 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  scroll-margin-top: 80px;
}

h2:first-of-type {
  margin-top: 32px;
}

p { 
  margin: 0 0 20px; 
  color: var(--text);
  font-size: 1.05rem;
}

.lead { 
  color: var(--accent); 
  font-weight: 600; 
  font-size: 1.15rem;
}

strong {
  color: var(--text);
  font-weight: 600;
}

ul { 
  margin: 0 0 24px 24px; 
  padding: 0;
  list-style: none;
}

ul li {
  position: relative;
  padding-left: 28px;
  margin: 12px 0;
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.6;
}

ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--brand);
  font-weight: bold;
  font-size: 1.2rem;
}

code { 
  background: rgba(14, 20, 34, 0.8); 
  border: 1px solid var(--border); 
  padding: 3px 8px; 
  border-radius: 6px; 
  color: #c5d1ff;
  font-size: 0.9em;
  font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
}

a { 
  color: var(--brand); 
  text-decoration: none;
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

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

.links { 
  list-style: none; 
  margin: 24px 0; 
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.links li {
  padding: 0;
  margin: 0;
}

.links li::before {
  display: none;
}

.links a { 
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: rgba(91, 156, 255, 0.1);
  border: 1px solid rgba(91, 156, 255, 0.2);
  border-radius: 10px;
  transition: var(--transition);
  font-weight: 500;
}

.links a:hover {
  background: rgba(91, 156, 255, 0.15);
  border-color: rgba(91, 156, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(91, 156, 255, 0.2);
}

/* Footer */
.site-footer { 
  border-top: 1px solid var(--border); 
  padding: 32px 0 40px; 
  margin-top: 60px;
  color: var(--muted); 
}

.footer-inner { 
  display: flex; 
  align-items: center; 
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.top { 
  color: var(--muted); 
  text-decoration: none;
  font-size: 1.5rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.top:hover { 
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* Mobile Navigation */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* Responsive Design */
@media (max-width: 860px) {
  .nav { 
    display: none;
  }
  
  .mobile-nav-toggle {
    display: block;
  }
  
  .post { 
    padding: 32px 24px; 
    border-radius: 16px;
    margin: 16px 0;
  }
  
  h1 { 
    font-size: 2rem; 
    line-height: 1.3;
  }
  
  h2 {
    font-size: 1.4rem;
    margin: 36px 0 16px;
  }
  
  p {
    font-size: 1rem;
  }
  
  .container {
    padding: 0 20px;
  }
  
  .header-inner {
    height: 64px;
  }
  
  .links a {
    padding: 10px 16px;
    font-size: 0.95rem;
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.3rem;
  }
  
  .post {
    padding: 24px 20px;
  }
  
  ul {
    margin-left: 20px;
  }
  
  ul li {
    padding-left: 24px;
    font-size: 1rem;
  }
  
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  main {
    padding: 24px 0;
  }
  
  h1 {
    font-size: 1.6rem;
  }
  
  .brand {
    font-size: 1rem;
  }
}