body {
  font-family: Arial;
  margin: 0;
  padding: 0;
}

.event-form {
  max-width: 420px;
  margin: 0 auto;
  padding: 0 10px;
}

.event-form label {
  display: block;
  margin: 12px 0 4px;
  font-weight: 500;
}

.event-form input,
.event-form select,
.event-form button {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 12px;
  font-size: 15px;
  margin-bottom: 10px;
}

input[readonly] {
  background: #eee;
}

#qr-code {
  width: 256px;
  height: 256px;
  margin: 0 auto;
}

#qr-code canvas,
#qr-code img {
  max-width: 100%;
  max-height: 100%;
}
.form-title {
  text-align: center;
  margin-bottom: 20px;
}

.checkbox-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-weight: 500;
}

.checkbox-inline input[type="checkbox"] {
  width: auto;   /* IMPORTANT: overrides 100% width */
}