@import url('https://fonts.googleapis.com/css2?family=Orbitron&family=Roboto&display=swap');
body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: #fff;
}
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: -1;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: rgba(0,0,0,0.3);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.logo {
  font-family: 'Orbitron', sans-serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 3px;
  color: #00ffff;
  user-select: none;
}
nav a {
  color: #00ffff;
  margin-left: 25px;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s;
}
nav a:hover {
  color: #80ffff;
}
.btn-download {
  display: inline-flex;
  align-items: center;
  background: #00ffff;
  color: #002f3d;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 25px;
  text-decoration: none;
  margin: 15px 10px 0 0;
  box-shadow: 0 4px 8px rgba(0,255,255,0.3);
  transition: background 0.3s, color 0.3s;
  font-size: 16px;
}
.btn-download:hover {
  background: #00cacc;
  color: #001f25;
}
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 120px 20px 80px;
  text-align: center;
}
.hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 48px;
  margin-bottom: 15px;
  text-shadow: 0 0 8px #00ffff;
}
.hero p {
  font-size: 20px;
  margin-bottom: 30px;
  max-width: 520px;
  color: #a0f0f0;
}
.download-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
section {
  max-width: 900px;
  margin: 0 auto 60px;
  padding: 0 20px;
}
h2 {
  text-align: center;
  font-family: 'Orbitron', sans-serif;
  font-size: 32px;
  margin-bottom: 30px;
  color: #00ffff;
}
.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  gap: 25px;
}
.feature-item {
  flex: 1 1 250px;
  background: rgba(0,255,255,0.1);
  border-radius: 15px;
  padding: 25px;
  box-shadow: 0 0 15px #00ffff33;
  text-align: center;
}
.feature-item p {
  font-size: 18px;
  line-height: 1.4;
}
.steps {
  display: flex;
  flex-direction: column;
  gap: 25px;
}
.step {
  background: rgba(0,255,255,0.1);
  padding: 20px 25px;
  border-radius: 15px;
  box-shadow: 0 0 10px #00ffff22;
  font-size: 18px;
}
.testimonials {
  background: rgba(0,255,255,0.05);
  padding: 40px 20px;
  border-radius: 15px;
  max-width: 700px;
  margin: 0 auto 40px;
  box-shadow: 0 0 20px #00ffff22;
}
.testimonial {
  margin-bottom: 25px;
  font-style: italic;
}
.testimonial-author {
  text-align: right;
  font-weight: 700;
  margin-top: 5px;
  color: #00cccc;
}
footer {
  text-align: center;
  padding: 20px;
  background: #001f25;
  color: #00cccc;
  font-size: 14px;
}
@media (max-width: 720px) {
  .features {
    flex-direction: column;
    align-items: center;
  }
  .download-buttons {
    flex-direction: column;
    gap: 15px;
  }
}