/* General Style */
body {
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #fff;
  text-align: center;
  overflow: hidden; /* prevents scrollbars from blur overflow */
}

body::before {
  content: "";
  position: absolute;
  top: -20px;   
  left: -20px;
  right: -20px;
  bottom: -20px;
  background: linear-gradient(#263c452a, #263c452a),
              url("background.png") center/cover no-repeat;
  filter: blur(12px);   
  z-index: -1;
}

/* Container with glassy background and animation */
.container {
  max-width: 500px;
  padding: 40px;
  background: rgba(13, 17, 23, 0.85); /* dark glassy background */
  border-radius: 20px;
  box-shadow: 0 8px 30px rgba(0, 180, 216, 0.25);
  backdrop-filter: blur(10px);

  /* Gradient border */
  border: 2px solid transparent;
  background-clip: padding-box, border-box;
  background-origin: border-box;
  background-image: 
    linear-gradient(rgba(13, 17, 23, 0.85), rgba(13, 17, 23, 0.85)),
    linear-gradient(135deg, #00b4d8, #e63946, #06d6a0, #ffb703);

  background-size: 200% 200%;
  animation: borderFlow 6s linear infinite, fadeInScale 1.2s ease-in-out;
}

/* Fade-in with scale animation */
@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Border flow animation */
@keyframes borderFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Glowing pulse effect for container */
@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 15px rgba(0,180,216,0.6), 0 0 40px rgba(230,57,70,0.4);
  }
  50% {
    box-shadow: 0 0 25px rgba(0,180,216,0.8), 0 0 60px rgba(230,57,70,0.6);
  }
}

.container {
  animation: borderFlow 6s linear infinite, fadeInScale 1.2s ease-in-out, pulseGlow 3s ease-in-out infinite;
}

/* Headings and paragraphs with staggered fade-in */
h1 {
  font-size: 2.2rem;
  margin-bottom: 15px;
  color: #1db954;
  animation: fadeInUp 1s ease forwards;
}

p {
  font-size: 1rem;
  margin-bottom: 25px;
  color: #ddd;
  animation: fadeInUp 1.2s ease forwards;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Button animation */
.btn {
  background: linear-gradient(90deg, #1db954, #1ed760);
  color: #fff;
  padding: 15px 40px;
  font-size: 1.2rem;
  font-weight: bold;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 6px 20px rgba(29, 185, 84, 0.4);
  animation: fadeInUp 1.4s ease forwards;
}

.btn {
  background: linear-gradient(90deg, #1db954, #1ed760);
  color: #fff;
  padding: 15px 40px;
  font-size: 1.2rem;
  font-weight: bold;
  border: 3px solid transparent; /* border added */
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(29, 185, 84, 0.3);
  transition: all 0.3s ease;
  background-clip: padding-box, border-box; /* allows gradient border */
  background-origin: border-box;
  animation: fadeInScale 1.2s ease-in-out;
  position: relative;
}

/* Gradient border effect */
.btn::before {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50px;
  background: linear-gradient(90deg, #06d6a0, #ffb703);
  z-index: -1;
}

/* Hover effect */
.btn:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(29, 185, 84, 0.5);
}


/* Responsive */
@media (max-width: 767px) {
  .container {
    width: 95%;
    padding: 20px;
  }

  h1 {
    font-size: 1.8rem;
  }

  p, .btn {
    font-size: 0.9rem;
  }
}