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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #1a1a2e;
  line-height: 1.6;
}

/* Nav */
header {
  background: #1a1a2e;
  position: sticky;
  top: 0;
  z-index: 100;
}
nav {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
}
.logo {
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
}
nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}
nav a {
  color: #cdd0d4;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}
nav a:hover {
  color: #fff;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 1.5rem;
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  color: #fff;
}
.hero h1 {
  font-size: 2.5rem;
  max-width: 700px;
  margin: 0 auto 1rem;
}
.hero p {
  font-size: 1.15rem;
  color: #cdd0d4;
  margin-bottom: 2rem;
}

/* Button */
.btn {
  display: inline-block;
  background: #4361ee;
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s;
}
.btn:hover {
  background: #3a56d4;
}

/* Sections */
.section {
  max-width: 960px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  text-align: center;
}
.section.alt {
  background: #f7f8fa;
  max-width: 100%;
}
.section.alt > * {
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}
.section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.section p {
  max-width: 600px;
  margin: 0 auto 1.5rem;
  color: #555;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.card {
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  text-align: left;
}
.card h3 {
  margin-bottom: 0.5rem;
  color: #1a1a2e;
}
.card p {
  color: #666;
  margin: 0;
}

/* Footer */
footer {
  background: #1a1a2e;
  color: #cdd0d4;
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 600px) {
  .hero h1 { font-size: 1.75rem; }
  nav ul { gap: 1.25rem; }
  .logo { font-size: 1rem; }
}