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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: repeating-linear-gradient(
    45deg,
    #0d0d0d,
    #0d0d0d 10px,
    #1a1a1a 10px,
    #1a1a1a 20px
  );
  color: #ffffff;
  overflow-x: hidden;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background: #111111;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.7);
}

.logo h1 {
  font-size: 28px;
  background: linear-gradient(to right, #3A8DFF, #00D4FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav ul {
  list-style: none;
  display: flex;
}

nav li {
  margin-left: 30px;
}

nav a {
  text-decoration: none;
  color: #00D4FF;
  font-size: 16px;
  position: relative;
  transition: color 0.3s, text-shadow 0.3s;
}

nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 0%;
  height: 2px;
  background: #00D4FF;
  transition: width 0.3s;
}

nav a:hover {
  text-shadow: 0 0 2px rgba(0, 212, 255, 0.5);
}

nav a:hover::after {
  width: 100%;
}

.gradient-bar {
  height: 4px;
  background: linear-gradient(to right, #3A8DFF 0%, #00D4FF 100%);
  position: fixed;
  top: 80px;
  width: 100%;
  z-index: 999;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: url('hero-background.jpg') no-repeat center center/cover;
  position: relative;
  padding-top: 100px;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(10, 10, 10, 0.8);
  z-index: -1;
}

.hero-content {
  position: relative;
  text-align: center;
  color: #ffffff;
  max-width: 800px;
  z-index: 1;
}

.hero-content h2 {
  font-size: 48px;
  margin-bottom: 20px;
  text-shadow: 0 0 5px rgba(0, 212, 255, 0.5);
}

.hero-content p {
  font-size: 20px;
  margin-bottom: 30px;
}

.btn {
  padding: 15px 30px;
  background: linear-gradient(to right, #3A8DFF, #00D4FF);
  color: #ffffff;
  text-decoration: none;
  font-size: 18px;
  border-radius: 5px;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s;
}

.btn:hover {
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.features {
  padding: 80px 20px;
  background-color: #0a0a0a;
  text-align: center;
}

.features h2 {
  font-size: 36px;
  margin-bottom: 50px;
  color: #00D4FF;
}

.feature-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 40px;
}

.feature-item {
  background: #1e1e1e;
  padding: 30px;
  border-radius: 10px;
  width: 300px;
  position: relative;
  overflow: hidden;
}

.feature-item h3 {
  font-size: 24px;
  margin-bottom: 20px;
  color: #00D4FF;
}

.feature-item p {
  font-size: 16px;
  color: #cccccc;
}

.feature-item::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(0, 212, 255, 0.1), transparent 70%);
  transform: rotate(45deg);
  animation: rotate 20s linear infinite;
  z-index: -1;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.cta {
  padding: 80px 20px;
  position: relative;
  text-align: center;
  color: #ffffff;
}

.cta::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(10, 10, 10, 0.8);
  z-index: -1;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta h2 {
  font-size: 36px;
  margin-bottom: 20px;
}

.cta p {
  font-size: 20px;
  margin-bottom: 30px;
}

.cta .btn {
  padding: 15px 30px;
}

.cta .btn:hover {
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

footer {
  padding: 20px;
  background: #111111;
  text-align: center;
  color: #777777;
}

@media (max-width: 768px) {
  .feature-list {
    flex-direction: column;
    align-items: center;
  }

  .feature-item {
    width: 100%;
    max-width: 400px;
  }

  .hero-content h2 {
    font-size: 32px;
  }

  .hero-content p {
    font-size: 18px;
  }

  nav li {
    margin-left: 15px;
  }
}