* {
  box-sizing: border-box;
}

body {
  min-width: 300px;
  font-size: 18px;
}

form {
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-content: stretch;
  align-items: center;
}

label {
  font-size: 20px;
}

input[type=text],
input[type=number] {
  display: block;
  margin: 0;
  font-family: sans-serif;
  font-size: 18px;
  appearance: none;
  box-shadow: none;
  border-radius: none;
  width: 75%;
}

input[type=text]:focus,
input[type=number]:focus,
input[type=checkbox]:focus {
  outline: none;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type=checkbox] {
  zoom: 2.5
}

label.form-label {
  margin-right: 15px;
  width: 25%;
}

div.button {
  background: #3498db;
  background-image: linear-gradient(to bottom, #3498db, #2980b9);
  box-shadow: 0px 1px 3px #666666;
  color: #ffffff;
  font-size: 20px;
  padding: 10px 20px 10px 20px;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
}

div.button:hover {
  background: #3cb0fd;
  background-image: linear-gradient(to bottom, #3cb0fd, #3498db);
  text-decoration: none;
}

#error {
  color: #a94442;
  background-color: #f2dede;
  border-color: #ebcccc;
  padding: 15px;
  margin-bottom: 1rem;
  border: 1px solid transparent;
  border-radius: .25rem;
  display: none;
  flex: 1 1 auto;
}

.field {
  padding: 10px;
  border: solid 5px #c9c9c9;
  transition: border 0.3s;
  flex: 1 1 auto;
}
.field:focus,
.field.focus {
  border: solid 5px #969696;
}

.flexRow {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-content: stretch;
  align-items: center;
  order: 0;
  flex: 0 1 auto;
  align-self: auto;
  margin: 5px;
}

div.container {
  margin: 20px auto;
  border: 1px solid rgba(0, 0, 0, 0.15);
  padding: 10px;
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  justify-content: center;
  align-content: flex-start;
  align-items: stretch;
  max-width: 800px;
}
