body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", sans-serif;
  background: radial-gradient(circle at 30% 50%, #071021, #02030a 70%);
  color: #dff3ff;
  overflow-x: hidden;
}

#starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
}

#starfield::before,
#starfield::after {
  content: "";
  position: absolute;
  width: 200%;
  height: 200%;
  background: transparent url("data:image/svg+xml,\
  <svg xmlns='http://www.w3.org/2000/svg' width='3' height='3'>\
  <circle cx='1.5' cy='1.5' r='1.5' fill='white' opacity='0.8'/>\
  </svg>") repeat;
  animation: drift 140s linear infinite;
  opacity: 0.35;
}

#starfield::after {
  animation-duration: 200s;
  opacity: 0.2;
}

@keyframes drift {
  from { transform: translate3d(0,0,0); }
  to { transform: translate3d(-600px, -600px, 0); }
}

.navbar {
  display: flex;
  justify-content: space-between;
  padding: 20px 40px;
  color: #9bd7ff;
  font-size: 18px;
}

.navbar a {
  color: #9bd7ff;
  text-decoration: none;
  margin-left: 20px;
  transition: 0.2s;
}

.navbar a:hover {
  color: #c8ecff;
  text-shadow: 0 0 8px #00aaff;
}

.logo {
  font-size: 22px;
  font-weight: bold;
  color: #7ddaff;
  text-shadow: 0 0 12px #00aaff;
}

.hero {
  text-align: center;
  margin-top: 120px;
  padding: 0 20px;
}

.hero-title {
  font-size: 64px;
  color: #7ddaff;
  text-shadow: 0 0 20px #00aaff;
}

.hero-subtitle {
  font-size: 20px;
  color: #bfeaff;
  margin-top: -10px;
  margin-bottom: 40px;
  opacity: 0.85;
}

.cta-button {
  display: inline-block;
  padding: 16px 32px;
  background: #009dff;
  color: white;
  border-radius: 12px;
  font-size: 20px;
  text-decoration: none;
  box-shadow: 0 0 15px #009dff;
  transition: 0.2s;
}

.cta-button:hover {
  background: #00b7ff;
  box-shadow: 0 0 25px #00b7ff;
}

.features {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin: 120px auto;
  max-width: 1000px;
  padding: 0 20px;
}

.feature-card {
  background: rgba(10, 20, 40, 0.55);
  border: 1px solid rgba(0, 150, 255, 0.4);
  border-radius: 14px;
  padding: 25px;
  width: 280px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0, 150, 255, 0.25);
  backdrop-filter: blur(8px);
}

.feature-card h3 {
  color: #7ddaff;
  margin-bottom: 10px;
}

.feature-card p {
  color: #cfeaff;
  opacity: 0.9;
}

.footer {
  text-align: center;
  padding: 40px;
  color: #9bd7ff;
  opacity: 0.7;
  margin-top: 80px;
}

.security-section {
  max-width: 1100px;
  margin: 120px auto;
  padding: 0 20px;
  text-align: center;
}

.security-section h2 {
  font-size: 42px;
  color: #7ddaff;
  text-shadow: 0 0 15px #00aaff;
  margin-bottom: 20px;
}

.security-intro {
  font-size: 20px;
  color: #cfeaff;
  opacity: 0.9;
  margin-bottom: 50px;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.security-card {
  background: rgba(10, 20, 40, 0.55);
  border: 1px solid rgba(0, 150, 255, 0.4);
  border-radius: 14px;
  padding: 25px;
  box-shadow: 0 0 20px rgba(0, 150, 255, 0.25);
  backdrop-filter: blur(8px);
  text-align: left;
}

.security-card h3 {
  color: #7ddaff;
  margin-bottom: 10px;
}

.security-card p {
  color: #cfeaff;
  opacity: 0.9;
  line-height: 1.5;
}