:root {
  --bg-color: #0f172a;
  --text-color: #e2e8f0;
  --accent-color: #38bdf8;
  --secondary-bg: #1e293b;
  --card-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --container-width: 800px;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
  background-attachment: fixed;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  text-decoration: underline;
  color: #7dd3fc;
}

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 2rem 1rem;
  width: 100%;
}

/* Header */
header {
  padding: 2rem 0;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--glass-border);
}

nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav a {
  font-weight: 600;
  color: var(--text-color);
  font-size: 1.1rem;
}

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

/* Typography */
h1, h2, h3 {
  color: #f1f5f9;
  line-height: 1.2;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(to right, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  margin-top: 3rem;
  border-left: 4px solid var(--accent-color);
  padding-left: 1rem;
}

/* Glassmorphism Cards */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  border-color: rgba(56, 189, 248, 0.3);
}

.post-date {
  font-size: 0.875rem;
  color: #94a3b8;
  margin-bottom: 0.5rem;
  display: block;
}

/* Footer */
footer {
  margin-top: auto;
  padding: 2rem 0;
  text-align: center;
  color: #64748b;
  font-size: 0.9rem;
  border-top: 1px solid var(--glass-border);
}

/* Utilities */
.intro {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  max-width: 60ch;
  color: #cbd5e1;
}

@media (max-width: 640px) {
  h1 {
    font-size: 2.25rem;
  }
  
  .card {
    padding: 1.5rem;
  }
}