body {
	padding: 0;
  margin: 0;
  border: 6px solid silver;
  min-height: 99vh;
}

h1, h2, h3 {
  margin: 0;
}

table {
	width: 100%;
	border-collapse: collapse;
}

td,th {
	text-align: left;
	padding: 3px 7px;
}

body > header {
	padding: 1rem;
	background-color: #333;
	color: white;
}

nav {
	display: flex;
	gap: 1rem;
}

nav a {
	color: white;
}

nav a.active {
	color: yellow;
}

main {
	padding: 1rem;
}

form {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 1rem;
  padding: 0.5rem;
}

form label {
  font-weight: bold;
}

input {
  padding: 0.5rem;
}

input[type="submit"] {
  grid-column: 1 / -1;
  margin-top: 1rem;
}

.container {
	width: 80%;
	margin: 0 auto;
}

.backdrop {
	position: fixed;
	display: flex;
	z-index: 1;
	left: 0;
	top: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0,0,0,0.3);
	flex-direction: column;
	justify-content: center;
	align-items: center;
	overflow: auto;
}

.modal {
	width: 80%;
	max-width: 500px;
	background-color: white;
	padding: 1rem;
}

.modal header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem;
  background-color: #f0f0f0;
  border-bottom: 1px solid #ccc;
  margin-bottom: 1rem;
}

.modal .close {
  float: right;
}

.feedback {
	margin-left: auto;
	transition: opacity 1s;
}

.flex-row {
	display: flex;
	flex-direction: row;
	width: 100%;
}

.flex-col {
	display: flex;
	flex-direction: column;
}

.flex-center {
	justify-content: center;
	align-items: center;
}

.align-center {
	align-items: center;
}

.space-between {
	justify-content: space-between;
}

.text-center {
	text-align: center;
}

.mb-1 {
	margin-bottom: 0.67rem;
}

.p0 {
	padding: 0;
}

.success {
	color: limegreen;
}

.error {
	color: red;
}