body {
  background-color: #05070a;
  background-image: linear-gradient(to bottom, rgba(5,7,10,0.3), rgba(5,7,10,0.92)), url('Sung-Jin-Woo-Wallpaper.jpg');
  background-size: cover;
  background-position: center 20%;
  background-attachment: fixed;
  background-repeat: no-repeat;
  color: #e0f7ff;
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  min-height: 100vh;
}
nav {
  background: rgba(5, 7, 10, 0.7);
  padding: 18px 40px;
  border-bottom: 1px solid rgba(0, 229, 255, 0.3);
  backdrop-filter: blur(15px);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  color: #fff;
  font-weight: 900;
  letter-spacing: 3px;
  font-size: 18px;
  text-shadow: 0 0 10px #00e5ff;
}
nav a {
  color: #8a9bb5;
  text-decoration: none;
  margin-left: 25px;
  font-weight: 600;
  letter-spacing: 2px;
  font-size: 16px;
  transition: 0.3s;
}
nav a:hover {
  color: #00e5ff;
  text-shadow: 0 0 10px #00e5ff;
}
.hero {
  text-align: center;
  padding: 120px 20px 80px;
}
.hero h1 {
  font-size: 65px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 3px;
  margin-bottom: 10px;
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.8), 0 0 60px rgba(0, 229, 255, 0.5);
  animation: glowPulse 3s infinite alternate;
}
.hero p {
  color: #8a9bb5;
  font-size: 16px;
  letter-spacing: 4px;
  text-transform: uppercase;
}
.btn {
  display: inline-block;
  margin-top: 40px;
  padding: 22px 65px;
  background: #00e5ff;
  color: #000;
  font-weight: 900;
  letter-spacing: 3px;
  border-radius: 10px;
  text-decoration: none;
  border: 2px solid #00e5ff;
  font-size: 20px;
  box-shadow: 0 0 25px rgba(0, 229, 255, 0.7), 0 0 80px rgba(0, 229, 255, 0.5);
  transition: 0.3s;
}
.btn:hover {
  background: #fff;
  border-color: #fff;
  box-shadow: 0 0 40px #00e5ff, 0 0 100px rgba(0, 229, 255, 0.7);
  transform: scale(1.05);
}
@keyframes glowPulse {
  from { text-shadow: 0 0 20px rgba(0,229,255,0.8), 0 0 40px rgba(0,229,255,0.4); }
  to { text-shadow: 0 0 30px rgba(0,229,255,1), 0 0 80px rgba(0,229,255,0.6); }
}