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

body {
  font-family: 'Poppins', sans-serif;
  background: radial-gradient(circle at top, #0d0d2b, #000010);
  color: #f5f5f5;
  overflow-x: hidden;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 3rem;
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(6px);
  z-index: 1000;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(90deg, #4fd1c5, #805ad5, #f6e05e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-links a {
  color: #f5f5f5;
  text-decoration: none;
  font-weight: 500;
  transition: 0.3s;
}

.nav-links a:hover {
  color: #4fd1c5;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: #fff;
  border-radius: 3px;
  transition: 0.3s;
}

.hamburger.toggle span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.toggle span:nth-child(2) {
  opacity: 0;
}

.hamburger.toggle span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
  padding: 0 1rem;
}

.hero h2 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, #4fd1c5, #805ad5, #f6e05e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.2rem;
  max-width: 600px;
  margin-bottom: 2rem;
  color: #cbd5e0;
}

.hero button {
  padding: 0.8rem 2rem;
  font-size: 1rem;
  border: none;
  border-radius: 50px;
  background: linear-gradient(90deg, #4fd1c5, #805ad5);
  color: #fff;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.hero button:hover {
  transform: scale(1.05);
}

/* Features */
.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  padding: 5rem 2rem;
}

.feature-card {
  background: rgba(19, 47, 99, 0.8);
  border-radius: 16px;
  padding: 2rem;
  width: 300px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  transition: transform 0.2s ease-in-out;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #4fd1c5;
}

/* Unlock/Hub Buttons */
.feature-card .hub-btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  background: linear-gradient(90deg, #4fd1c5, #805ad5);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  border: none;
  margin-top: 1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card .hub-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 20px rgba(79, 209, 197, 0.5);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  background: #000010;
  color: #a0aec0;
  font-size: 0.9rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    right: 20px;
    background: rgba(0, 0, 0, 0.9);
    flex-direction: column;
    padding: 1rem;
    border-radius: 10px;
    gap: 1rem;
    z-index: 1000;
  }

  .nav-links.nav-active {
    display: flex;
  }

  .nav-links a {
    margin: 1rem 0;
  }

  .hamburger {
    display: flex;
  }
}