body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 2rem;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(115, 127, 151, 0.3), rgba(67, 86, 112, 0.3));
  pointer-events: none;
  z-index: -1;
}

#bgVideo {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.container {
  background-color: rgba(255, 255, 255, 0.8);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(10px);
  max-width: 600px;
  width: 100%;
  transition: all 0.3s ease-in-out;
}

h1 {
  margin-bottom: 1.5rem;
  color: #2d89ef;
  font-size: 2rem;
}

h2 {
  margin-bottom: 1.5rem;
  color: #1657a1;
  font-size: 90%;
}

input[type="text"],
input[type="number"],
input[type="color"] {
  padding: 0.6rem;
  margin: 0.5rem 0;
  border: 1px solid rgba(22, 87, 161, 0.4);
  border-radius: 20px;
  width: 100%;
  box-sizing: border-box;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  box-shadow: 
    0 8px 32px rgba(0, 0, 0, 0.1),
    inset 0 0 8px rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  font-size: 1rem;
  color: #1657a1;
}

input::placeholder {
  color: rgba(22, 87, 161, 0.6);
}

input:focus {
  box-shadow: 
    4px 4px 8px rgba(0, 0, 0, 0.2),
    -4px -4px 8px rgba(255, 255, 255, 0.9),
    inset 2px 2px 4px rgba(255, 255, 255, 0.5),
    inset -2px -2px 4px rgba(45, 137, 239, 0.2);
  outline: none;
  transform: translateY(-2px);
}

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.options label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  color: #1657a1;
}

button {
  padding: 0.8rem 2rem;
  margin-top: 1.5rem;
  background: linear-gradient(145deg, #f0f4f8, #d9e2ee);
  color: #2d89ef;
  border: none;
  border-radius: 20px;
  font-weight: bold;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 
    8px 8px 16px rgba(0, 0, 0, 0.15),
    -8px -8px 16px rgba(255, 255, 255, 0.8),
    inset 2px 2px 4px rgba(255, 255, 255, 0.5),
    inset -2px -2px 4px rgba(0, 0, 0, 0.1);
}

button::after {
  content: "→";
  position: absolute;
  right: 20px;
  opacity: 0;
  transition: all 0.3s ease;
}

button:hover {
  box-shadow: 
    4px 4px 8px rgba(0, 0, 0, 0.2),
    -4px -4px 8px rgba(255, 255, 255, 0.9),
    inset 2px 2px 4px rgba(255, 255, 255, 0.5),
    inset -2px -2px 4px rgba(45, 137, 239, 0.2);
  color: #1657a1;
  transform: translateY(-3px);
  padding-right: 2.5rem;
}

button:hover::after {
  opacity: 1;
  right: 10px;
}

button:active {
  box-shadow: 
    2px 2px 4px rgba(0, 0, 0, 0.1),
    -2px -2px 4px rgba(255, 255, 255, 0.5),
    inset 4px 4px 8px rgba(0, 0, 0, 0.1),
    inset -4px -4px 8px rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.preview-box {
  margin-top: 2rem;
  background-color: rgba(250, 250, 250, 0.9);
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
  backdrop-filter: blur(6px);
  transition: all 0.3s ease;
}

.preview-box h2 {
  margin-bottom: 3rem;
  font-size: 1.2rem;
  color: #1657a1;
}

#qrcode {
  display: flex;
  justify-content: center;
  transition: all 0.3s ease-in-out;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  body::before {
    background: linear-gradient(to right, rgba(26, 31, 46, 0.5), rgba(15, 20, 25, 0.5));
  }

  .container {
    background-color: rgba(76, 86, 117, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  }

  h1 {
    color: #64b5f6;
  }

  h2 {
    color: #90caf9;
  }

  input[type="text"],
  input[type="number"],
  input[type="color"] {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(100, 181, 246, 0.3);
    backdrop-filter: blur(10px);
    color: #64b5f6;
    box-shadow: 
      0 8px 32px rgba(0, 0, 0, 0.3),
      inset 0 0 8px rgba(255, 255, 255, 0.1);
  }

  input::placeholder {
    color: rgba(100, 181, 246, 0.5);
  }

  input:focus {
    box-shadow: 
      4px 4px 8px rgba(0, 0, 0, 0.5),
      -4px -4px 8px rgba(255, 255, 255, 0.1),
      inset 2px 2px 4px rgba(0, 0, 0, 0.3),
      inset -2px -2px 4px rgba(100, 181, 246, 0.2);
  }

  .options label {
    color: #64b5f6;
  }

  button {
    background: linear-gradient(145deg, #2a3f5f, #1e2d42);
    color: #64b5f6;
    box-shadow: 
      8px 8px 16px rgba(0, 0, 0, 0.4),
      -8px -8px 16px rgba(255, 255, 255, 0.05),
      inset 2px 2px 4px rgba(0, 0, 0, 0.3),
      inset -2px -2px 4px rgba(255, 255, 255, 0.05);
  }

  button:hover {
    color: #90caf9;
    box-shadow: 
      4px 4px 8px rgba(0, 0, 0, 0.5),
      -4px -4px 8px rgba(255, 255, 255, 0.1),
      inset 2px 2px 4px rgba(0, 0, 0, 0.3),
      inset -2px -2px 4px rgba(100, 181, 246, 0.2);
  }

  button:active {
    box-shadow: 
      2px 2px 4px rgba(0, 0, 0, 0.3),
      -2px -2px 4px rgba(255, 255, 255, 0.05),
      inset 4px 4px 8px rgba(0, 0, 0, 0.3),
      inset -4px -4px 8px rgba(100, 181, 246, 0.1);
  }

  .preview-box {
    background-color: rgba(146, 168, 201, 0.26);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  }

  .preview-box h2 {
    color: #64b5f6;
  }
}