body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #b7c3d3;
    transition: 0.3s;
  }
  
 .dark {
    background: #1e1e1e;
    color: white;
  }
  
  header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    color: white;
    background: linear-gradient(to right, #1e3c43, #b33a2f);
  }
  
  .menu {
    position: relative;
    display: flex;
    align-items: center;
  }
  
  .menu button {
    margin-left: 6px;
    padding: 8px 10px;
    border: none;
    background: #c1443c;
    color: white;
    border-radius: 8px;
    cursor: pointer;
  }
  
  .dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: 45px;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    min-width: 120px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  }
  
  .dropdown a {
    display: block;
    padding: 10px;
    text-decoration: none;
    color: black;
    font-size: 14px;
  }
  
  .dropdown a:hover {
    background: #eee;
  }
  
  section {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 85vh;
  }
  
  .card {
    background: #eee;
    padding: 20px;
    border-radius: 12px;
    width: 650px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }
  
  .flex {
    display: flex;
    gap: 30px;
    align-items: center;
  }
  
  .form {
    flex: 1;
  }

  .preview {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  
  .hidden {
    display: none;
  }

  input, button {
    width: 100%;
    margin: 8px 0;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 14px;
  }
  
  button {
    background: linear-gradient(to right, #b33a2f, #1e3c43);
    color: white;
    border: none;
    cursor: pointer;
    transition: 0.2s;
  }
  
  button:hover {
    opacity: 0.9;
  }
  
  #qrcode {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 220px;
  }
  
  #downloadBtn {
    display: none;
    margin-top: 15px;
  }
  
  footer {
    text-align: center;
    padding: 10px;
  }
  
  .dark .card {
    background: #2c2c2c;
  }
  
  .dark input {
    background: #444;
    color: white;
  }
  #downloadOptions {
    margin-top: 10px;
  }
  
  #scanResult {
    margin-top: 10px;
    padding: 10px;
    background: #fff;
    border-radius: 8px;
  }
  
  .dark #scanResult {
    background: #444;
  }
  
  #qrcode {
    flex-wrap: wrap;
    gap: 10px;
  }
  #historyList {
    max-height: 300px;   
    overflow-y: auto;    
    padding-right: 5px;
  }
  
  #historyList::-webkit-scrollbar {
    width: 6px;
  }
  
  #historyList::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 5px;
  }
  
  #historyList::-webkit-scrollbar-thumb:hover {
    background: #555;
  }
body {
  transition: background 0.4s ease, color 0.4s ease;
}

.card {
  transition: background 0.4s ease, color 0.4s ease;
}

.dark header {
  box-shadow: 0 0 10px rgba(255,255,255,0.2);
}

button {
  transition: all 0.3s ease;
}
body.dark {
  animation: fadeDark 0.3s ease;
}

@keyframes fadeDark {
  from { opacity: 0.7; }
  to { opacity: 1; }
}
#qrcode {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 220px;
}

#qrcode canvas {
  max-width: 220px;
  width: 100%;
  height: auto;
}
body {
  transition: background 0.4s ease, color 0.4s ease;
}

header {
  transition: all 0.4s ease;
}

#toggleTheme {
  font-size: 18px;
  transition: transform 0.3s ease;
}

#toggleTheme:hover {
  transform: rotate(20deg) scale(1.2);
}

footer a {
  color: white;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.dark footer {
  background: #111;
}
.git-icon {
  width: 20px;   
  height: 20px;
  vertical-align: middle;
}
.card p {
  line-height: 1.6;
  margin-bottom: 10px;
}

.card a {
  color: #1e88e5;
  font-weight: bold;
}

#switchCameraBtn {
  margin-top: 10px;
}

.scanner-container {
  position: relative;
  width: 260px;
  margin: auto;
}

#video {
  width: 100%;
  border-radius: 12px;
  object-fit: cover;
}

#scanBox {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 160px;
  height: 160px;
  transform: translate(-50%, -50%);
  border: 3px dashed white;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(255,255,255,0.5);
  transition: 0.3s ease;
}

#scanBox::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  background: red;
  top: 0;
  animation: scanLine 2s linear infinite;
}

@keyframes scanLine {
  0% { top: 0; }
  100% { top: 100%; }
}

#scanBox.active {
  border-color: lime;
  box-shadow: 0 0 15px lime;
}

#scanResult {
  margin-top: 10px;
  font-weight: bold;
  text-align: center;
  word-break: break-word;
}

#copyBtn {
  display: none;
  margin-top: 10px;
}

#switchCameraBtn {
  margin-top: 10px;
}

.dark #scanBox {
  border-color: #aaa;
}

.dark #scanBox.active {
  border-color: lime;
}