* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Segoe UI', sans-serif;
  background: #121216;
  color: #f8f8f8;
  overflow-x: hidden;
}
a {
  color: #00d2ff;
  text-decoration: none;
}
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: #1e1e26;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  z-index: 1000;
}
.logo {
  font-size: 1.5rem;
  font-weight: bold;
}
.nav-links {
  display: flex;
  gap: 1.5rem;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}
.hamburger div {
  width: 25px;
  height: 3px;
  background: #f8f8f8;
}
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 60px;
    right: 0;
    background: #1e1e26;
    flex-direction: column;
    width: 200px;
    height: 100vh;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  .nav-links.active {
    transform: translateX(0);
  }
  .hamburger {
    display: flex;
  }
}
.hero {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 60px;
  background: radial-gradient(ellipse at center, #1a1a22 0%, #121216 100%);
}
.card-3d {
  background: #22222c;
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.6);
  text-align: center;
  transition: transform 0.3s ease;
}
.card-3d:hover {
  transform: rotateY(10deg) rotateX(5deg);
}
.btn {
  background: #00d2ff;
  color: #000;
  padding: 0.8rem 2rem;
  border-radius: 30px;
  font-weight: bold;
  transition: background 0.3s ease;
  display: inline-block;
  margin-top: 1.5rem;
}
.btn:hover {
  background: #00a8cc;
}
.section {
  padding: 4rem 2rem;
  text-align: center;
}
.dark-bg {
  background: #1a1a22;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.feature {
  background: #22222c;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 15px 30px rgba(0,0,0,0.3);
  transition: transform 0.3s ease;
}
.feature:hover {
  transform: rotateY(8deg) rotateX(4deg);
}
footer {
  text-align: center;
  padding: 2rem;
  background: #1e1e26;
  font-size: 0.9rem;
}