body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b1221;
  color: white;
  text-align: center;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background: #111827;
}

header .logo {
  display: flex;
  align-items: center;
  font-weight: bold;
  font-size: 20px;
}

header .logo img {
  height: 30px;
  margin-right: 10px;
}

nav a {
  margin-left: 20px;
  text-decoration: none;
  color: white;
  font-weight: bold;
}

.intro {
  padding: 40px 20px;
}

.buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 20px 0;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 300px;
  padding: 15px;
  margin: 10px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  text-decoration: none;
  color: white;
  transition: transform 0.2s;
}

.btn img {
  height: 24px;
  margin-right: 8px;
}

.btn:hover {
  transform: scale(1.05);
}

.white { background: white; color: black; }
.green { background: #10b981; }
.purple { background: #6366f1; }
.blue { background: #3b82f6; }
.dark { background: #374151; }

.video-section {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 30px;
}

.video-section video {
  width: 100%;
  max-width: 900px;
  height: 450px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0,0,0,0.5);
}

@media (max-width: 768px) {
  .btn {
    width: 90%;
  }
  .video-section video {
    height: 250px;
  }
}

footer {
  margin-top: 40px;
  padding: 20px;
  background: #111827;
  font-size: 14px;
  color: #bbb;
}