body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Segoe UI', sans-serif;
  background: #0e0e0e;
  color: white;
  /* overflow: hidden; */
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(15, 15, 15, 0.8);
  display: flex;
  justify-content: center;
  padding: 15px 0;
  z-index: 10;
}

nav a {
  margin: 0 20px;
  color: white;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.2s;
}

nav a:hover {
  color: #ff5757;
}

.content {
  position: relative;
  z-index: 2;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.content h1 {
  font-size: 3rem;
}

.content h1 span {
  color: white;/*; #ff5757 */
}

.add-button {
  margin-top: 20px;
  padding: 12px 25px;
  background: white;
  color: black;
  font-weight: bold;
  font-size: 1.2rem;
  border-radius: 12px;
  text-decoration: none;
  transition: background 0.2s;
}

.add-button:hover {
  background: #cecdcd;
}

/* Particles background */
#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #0e0e0e;
  z-index: 0;
}