* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "poppins", sans-serif;
}
body {
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a, #1e293b, #312e81);
  display: flex;
  align-items: center;
  justify-content: center;
}
.container {
  width: 90%;
  max-width: 500px;
  border: 2px solid #8b5cf6;
  border-radius: 5px;
  padding: 40px 20px;
  animation: glow 2s infinite alternate;
  position: relative;
}
.container h1 {
  color: white;
  font-size: 42px;
  font-weight: 600;
  line-height: 1.2;
}
.container h1 span {
  color: #c4b5fd;
  border-bottom: 1px solid #c4b5fd;
  padding: 0 0 8px;
}
.input-box {
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 12px;
  border-radius: 10px;
  margin: 30px 0;
  position: relative;
}
.input-box input {
  flex: 1;
  height: 40px;
  border: 0;
  outline: 0;
  background: transparent;
  color: white;
  font-size: 18px;
  font-weight: 500;
  padding: 7px 10px;
}
.input-box input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}
#copyIcon {
  color: rgba(255, 255, 255, 0.7);
  font-size: 22px;
  cursor: pointer;
  transition: 0.3s ease;
}
#copyIcon:hover {
  color: #c4b5fd;
  transform: scale(1.1);
}
#passwordBtn {
  width: 100%;
  border: 0;
  outline: 0;
  padding: 16px;
  border-radius: 10px;

  background: linear-gradient(135deg, #8b5cf6, #6366f1);
  color: white;

  font-size: 16px;
  font-weight: 600;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  cursor: pointer;
  transition: 0.3s ease;

  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}
#copy-msg {
  color: white;
  position: absolute;
  top: 49%;
  right: 30px;
  background: rgba(99, 102, 241, 0.15);
  color: #c4b5fd;

  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;

  border: 1px solid #8b5cf6;
  border-radius: 6px;

  backdrop-filter: blur(8px);

  opacity: 0;
  transform: translateY(-10px);

  transition: all 1.4s ease;
}
#copy-msg.show {
  opacity: 1;
  transform: translateY(-45px);
}
#slider {
  width: 200px;
  appearance: none;
  height: 6px;
  border-radius: 20px;

  background: rgba(255, 255, 255, 0.15);

  outline: none;
  cursor: pointer;

  margin: 40px 0 20px 0;
}
#slider::-webkit-slider-thumb {
  appearance: none;

  width: 22px;
  height: 22px;
  border-radius: 50%;

  background: #8b5cf6;

  border: 3px solid #c4b5fd;

  box-shadow: 0 0 10px rgba(139, 92, 246, 0.8);

  cursor: pointer;

  transition: 0.3s;
}
#slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}
#slider-length {
  color: #c4b5fd;

  font-size: 14px;
  font-weight: 500;

  margin-top: 10px;

  letter-spacing: 0.5px;

  text-shadow: 0 0 8px rgba(196, 181, 253, 0.5);
}
.slider-num {
  color: white;
}
@keyframes glow {
  from {
    box-shadow:
      0 0 10px #8b5cf6,
      0 0 20px #8b5cf6;
  }

  to {
    box-shadow:
      0 0 20px #a78bfa,
      0 0 40px #6366f1;
  }
}

@media (max-width: 480px) {
  body {
    padding: 16px 12px;
  }
  .container {
    width: 100%;
    padding: 28px 16px;
    border-radius: 12px;
  }
  .container h1 {
    font-size: 28px;
  }
  .input-box {
    margin: 20px 0;
    padding: 14px 10px;
  }
  .input-box input {
    font-size: 15px;
  }
  #slider {
    width: 100%;
    margin: 24px 0 14px 0;
  }
  #passwordBtn {
    padding: 14px 12px;
    font-size: 14px;
  }
}