:root { color-scheme: light; }
body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f6f7fb;
  color: #111;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  background: #ffffff;
  border-bottom: 1px solid #e6e7ee;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-title {
  font-size: 16px;
  font-weight: 700;
}
.logo {
  height: 38px;
  width: auto;
  object-fit: contain;
}
.container {
  max-width: 920px;
  margin: 26px auto;
  padding: 0 16px;
}
.card {
  background: #ffffff;
  border: 1px solid #e6e7ee;
  border-radius: 12px;
  padding: 18px;
}
.dropzone {
  border: 2px dashed #c9cbe0;
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  background: #fbfbfe;
}
.dropzone.dragover {
  border-color: #6b73ff;
  background: #f0f1ff;
}
.small {
  font-size: 13px;
  color: #444;
}
.row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.btn {
  border: 1px solid #c9cbe0;
  border-radius: 10px;
  padding: 10px 14px;
  background: #ffffff;
  cursor: pointer;
  font-weight: 600;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.result {
  margin-top: 14px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #e6e7ee;
  background: #fafafe;
}
.code {
  font-family: Consolas, monospace;
  font-size: 13px;
  word-break: break-all;
}
.qr {
  margin-top: 10px;
}
.viewer {
  width: 100%;
  height: 80vh;
  border: 1px solid #e6e7ee;
  border-radius: 12px;
}
.footer {
  padding: 18px;
  text-align: center;
  color: #666;
  font-size: 12px;
}