body, html {
  height: 100%;
  margin: 0;
  font-family: 'Helvetica Neue', sans-serif;
  overflow: hidden;
  background: black;
}

#bg-video {
  position: fixed;
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: 100%;
  object-fit: cover;
  z-index: -1;
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
}

h1 {
  font-size: 3rem;
  letter-spacing: 4px;
  margin: 0;
  font-weight: bold;
}

h2 {
  font-size: 1.3rem;
  margin: 10px 0 30px;
  letter-spacing: 2px;
  font-weight: 400;
}

.btn {
  padding: 12px 30px;
  background: transparent;
  border: 2px solid #fff;
  color: white;
  text-decoration: none;
  font-size: 1rem;
  transition: background 0.3s, color 0.3s;
}

.btn:hover {
  background: white;
  color: black;
}