body, html {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  font-family: 'Segoe UI', sans-serif;
  color: white;
  user-select: none;
}

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

.container {
  max-width: 480px;
  margin: auto;
  padding: 30px 20px;
  text-align: center;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 20px;
  margin-top: 20px;
}

h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

p {
  font-size: 16px;
  margin: 8px 0;
}

.highlight {
  color: #00ffff;
  font-weight: bold;
}

.task-btn {
  background: #111;
  border: 1px solid #444;
  color: #fff;
  padding: 12px;
  width: 100%;
  margin: 10px 0 4px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.task-btn img {
  width: 20px;
  margin-right: 8px;
  vertical-align: middle;
}

input[type="file"] {
  width: 100%;
  margin-top: 4px;
  margin-bottom: 12px;
  padding: 10px;
  border-radius: 10px;
  border: none;
  background: rgba(0, 0, 0, 0.4);
  color: white;
}

input[type="text"] {
  width: 100%;
  margin-top: 10px;
  padding: 10px;
  border-radius: 10px;
  border: none;
}

input[disabled], button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

#submit {
  background: #00ffff;
  color: black;
  font-weight: bold;
  font-size: 16px;
  border: none;
  padding: 12px;
  border-radius: 12px;
  margin-top: 10px;
  cursor: pointer;
}

.mint-info {
  background: rgba(255, 255, 255, 0.05);
  padding: 12px;
  border-radius: 12px;
  margin: 16px 0;
  font-size: 15px;
  line-height: 1.6;
}

footer {
  margin-top: 30px;
}

.social-links img {
  width: 30px;
  margin: 10px;
}


/* success alert */

 .success-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #4caf50; /* সবুজ ব্যাকগ্রাউন্ড */
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    font-weight: 600;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    opacity: 0;
    animation: fadeInOut 3s forwards;
    z-index: 9999;
  }

  @keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(-20px); }
    10% { opacity: 1; transform: translateY(0); }
    80% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-20px); }
  }