body {
  margin: 0;
  font-family: Arial;
  background: #0f172a;
  color: white;
}

/* PARTICLES */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* NAV */
header {
  position: fixed;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 20px;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(10px);
}

nav a {
  color: white;
  margin: 10px;
  text-decoration: none;
}

/* HERO */
.hero {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.hero span {
  color: cyan;
}

/* SECTIONS */
.section {
  padding: 80px 20px;
  text-align: center;
}

/* GRID */
.grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

/* CARD */
.card {
  background: rgba(255,255,255,0.05);
  padding: 20px;
  border-radius: 15px;
  width: 250px;
  transition: 0.4s;
}

.card:hover {
  transform: translateY(-10px) scale(1.05);
  box-shadow: 0 0 20px cyan;
}

/* FORM */
form {
  display: flex;
  flex-direction: column;
  width: 300px;
  margin: auto;
}

input, textarea {
  margin: 5px;
  padding: 10px;
}

button {
  padding: 10px;
  background: cyan;
  border: none;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 20px;
}