*,
::before,
::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

:root {
	--background-color-main: rgba(229, 234, 240, 0.5);
	--background-color-secondary: rgba(255, 255, 255, 0.8);
	--background-color-error-box: rgba(255, 255, 255, 0.95);
	--background-color-red: rgb(255, 0, 0, 0.4);
	--background-color-green: rgb(0, 128, 0, 0.4);
	--background-color-blue: rgba(0, 0, 255, 0.4);	
	--font-color-main: rgb(39, 40, 43);
	--font-color-secondary: rgb(255, 255, 255, 1); 
	--box-shadow: 11px 11px 22px -9px rgba(201, 208, 215, 1);
	--box-shadow-inset:  5px 5px 10px -9px rgba(201, 208, 215, 0.4);
	--border-color-red: rgb(255, 0, 0, 0.4);
	--font-family: Calibri, Helvetica, Arial, sans-serif;
}

body {
	min-height: 100vh;
	width: 100%;
	font-family: var(--font-family);
	color: var(--font-color-main);
	background-color: var(--background-color-main);
}

header {
	padding: 50px 0;
	text-align: center;
}

h1 {
	font-size: 2.75rem;
}

main {
	margin: 0 auto;
	max-width: 80vw;
}

section {
	display: flex;
	flex-direction: column;
	align-items: center;
	padding: 20px;
	background-color: var(--background-color-secondary);
	border-radius: 10px;
	-webkit-box-shadow: var(--box-shadow);
	-moz-box-shadow: var(--box-shadow);
	box-shadow: var(--box-shadow);
}

.form-container {
	max-width: 600px;
	position: relative;
}

form {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-around;	
	font-size: 16px;
	line-height: 2rem;
	
}

.input-container {
	display: flex;
	justify-content: space-between;
	padding: 5px;
	min-width: 240px;
}

.input-container input {
	width: 14ch;
	font-size: 16px;
	font-family: inherit;
	text-align: center;
	border: none;
	border-radius: 1ch;
	-webkit-box-shadow: var(--box-shadow),
		inset var(--box-shadow-inset);
	-moz-box-shadow: var(--box-shadow),
		inset var(--box-shadow-inset);
	box-shadow: var(--box-shadow),
		inset var(--box-shadow-inset);
}

.input-container input.validation-error {
	background-color: var(--background-color-red);
}

.validation-error-box {
	position: absolute;
	bottom: -90px;
	left: 0;
	right: 0;
	padding: 20px;
	background-color: var(--background-color-error-box);
	border: 2px solid var(--border-color-red);
	border-radius: 1ch;
	text-align: center;
}

.hidden{
	display: none;
}

.table-container {
	margin-top: 20px;
	width: 100%;
	max-height: 50vh;
	overflow-x: auto;
}

.table {
	margin: 0 auto;
}

.table-cell {
	background-color: var(--background-color-main);
	padding: 0.1875em 0.5em;
	min-width: 50px;
}

.selected-column {
	background-color: var(--background-color-red);
}

.selected-row {
	background-color: var(--background-color-green);
}

.selected-row .selected-column {
	background-color: var(--background-color-blue);
	color: var(--font-color-secondary);
}