:root {
  --primary: #6366f1;
  --accent: #ec4899;
  --bg: #090d16;
  --text: #ffffff;
  --subtext: #cbd5e1;
  --card-bg: rgba(255,255,255,0.05);
  --card-border: rgba(255,255,255,0.1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.container { max-width: 1120px; margin: 0 auto; padding: 0 1.5rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 0.875rem;
  padding: 0.875rem 1.75rem;
  font-weight: 700;
  font-size: 0.9375rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: -0.01em;
}
.btn:hover { transform: translateY(-1.5px); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #ffffff;
  box-shadow: 0 8px 24px -4px rgba(0,0,0,0.25);
}
.btn-primary:hover {
  box-shadow: 0 12px 28px -4px rgba(0,0,0,0.35);
  filter: brightness(1.08);
}
.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
}
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 1.25rem;
  padding: 1.75rem;
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.15);
  transition: all 0.25s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,0.2);
  box-shadow: 0 16px 36px -12px rgba(0,0,0,0.25);
}
.section { padding: 5rem 0; }
.center { text-align: center; }
.grid { display: grid; gap: 1.75rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.subtext { color: var(--subtext); font-size: 0.95rem; line-height: 1.6; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  border-radius: 9999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 0.35rem 1rem;
  font-size: 0.8125rem;
  font-weight: 700;
  backdrop-filter: blur(8px);
  letter-spacing: 0.01em;
}
nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding: 1.125rem 2.5rem;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
}
nav .links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--subtext);
}
nav .links a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s;
}
nav .links a:hover { color: var(--text); }
.pricing-tier.popular {
  border: 2px solid var(--primary);
  box-shadow: 0 0 35px -5px rgba(99, 102, 241, 0.25);
  position: relative;
}
.pricing-tier-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  font-size: 0.8125rem;
  color: var(--subtext);
  border-top: 1px solid var(--card-border);
  background: rgba(0,0,0,0.2);
}
details {
  border-radius: 1rem;
  transition: all 0.2s ease;
}
details > summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.2s;
}
details[open] > summary::after {
  content: "−";
}
@media (max-width: 768px) {
  .container { padding: 0 1.25rem; }
  .section { padding: 3.5rem 0; }
  nav { padding: 1rem 1.25rem; }
  h1 { font-size: 2.1rem !important; }
  h2 { font-size: 1.6rem !important; }
}