body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: radial-gradient(circle at top, #0f172a, #020617);
  color: #e5e7eb;
  line-height: 1.7;
}

/* Layout */
.container {
  max-width: 1000px;
  margin: auto;
  padding: 60px 24px;
}

/* Typography */
h1, h2, h3 {
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 56px;
  font-weight: 700;
}

h2 {
  font-size: 34px;
  font-weight: 600;
}

p {
  color: #94a3b8;
  font-size: 17px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 120px 20px 100px;
}

.hero p {
  margin: 12px auto;
}

/* Buttons */
.buttons {
  margin-top: 30px;
}

.btn {
  display: inline-block;
  padding: 14px 24px;
  margin: 8px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

/* Primary button */
.primary {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: white;
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(99, 102, 241, 0.5);
}

/* Secondary button */
.secondary {
  border: 1px solid #4f46e5;
  color: #818cf8;
  background: rgba(99, 102, 241, 0.05);
}

.secondary:hover {
  background: rgba(99, 102, 241, 0.15);
}

/* Sections */
.section {
  margin-top: 80px;
}

/* Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card {
  flex: 1 1 calc(50% - 12px); /* 2 columns with gap accounted for */
  background: rgba(17, 24, 39, 0.6);
  padding: 24px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.1);
}
@media (max-width: 700px) {
  .card {
    flex: 1 1 100%;
  }
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.4);
}

/* Footer */
footer {
  text-align: center;
  padding: 60px 20px;
  color: #64748b;
  font-size: 14px;
}