:root {
  --bg-color: #020617; /* Very deep blue/black */
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #020617 100%);
  --surface: rgba(30, 41, 59, 0.4);
  --surface-hover: rgba(30, 41, 59, 0.7);
  --border: rgba(255, 255, 255, 0.1);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-secondary: #10b981;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

h1 { font-size: 3.5rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 1.5rem; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }

p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

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

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

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navbar */
nav {
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.logo img {
  height: 32px;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
}

/* Hero Section */
.hero {
  padding: 8rem 0;
  text-align: center;
}

.hero p.subtitle {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 3rem auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background-color: var(--accent);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  color: white;
}

.btn-secondary {
  background-color: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--surface-hover);
}

/* Grid & Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 4rem 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1rem 0;
}

.price span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  margin: 2rem 0;
  text-align: left;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.pricing-features li svg {
  color: var(--accent-secondary);
  flex-shrink: 0;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 4rem 0;
  margin-top: 6rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--text-primary);
}

/* Markdown Content Styling */
.md-content {
  max-width: 800px;
  margin: 4rem auto 8rem auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 3rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.md-content h1 { font-size: 2.5rem; margin-top: 0; margin-bottom: 2rem; }
.md-content h2 { font-size: 1.75rem; margin-top: 2.5rem; margin-bottom: 1rem; color: var(--text-primary); }
.md-content h3 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.75rem; color: var(--text-primary); }
.md-content p { color: var(--text-secondary); margin-bottom: 1.5rem; line-height: 1.7; }
.md-content ul, .md-content ol { color: var(--text-secondary); margin-bottom: 1.5rem; padding-left: 1.5rem; line-height: 1.7; }
.md-content li { margin-bottom: 0.5rem; }
.md-content a { color: var(--accent); text-decoration: underline; text-decoration-color: rgba(59, 130, 246, 0.3); text-underline-offset: 4px; }
.md-content a:hover { text-decoration-color: var(--accent); }
.md-content blockquote { border-left: 4px solid var(--accent); padding-left: 1rem; margin-left: 0; color: var(--text-secondary); font-style: italic; }

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  .hero { padding: 4rem 0; }
  .nav-links { display: none; } /* Could add a mobile menu later */
  .footer-content { flex-direction: column; }
  .md-content { padding: 2rem; margin-top: 2rem; }
}