:root {
	--clr-main: hsl(0 0% 11%);
	--clr-main-light: hsl(0 0% 100%);
	--clr-accent: hsl(73.5 100% 35.7%);
	--clr-accent-dark: hsl(74 100% 20%);
	--clr-error: red;

	--ff-body: 'DM Mono', monospace;
	--ff-heading: 'Tiny5', 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande',
		'Lucida Sans Unicode', Geneva, Verdana, sans-serif;

	--fs-body: clamp(0.9rem, calc(0.1rem + 4vw), 1.5rem);
	--fs-body-sm: clamp(0.875rem, calc(0.71rem + 0.83vw), 1rem);
	--fs-heading: clamp(2rem, calc(0.67rem + 6.67vw), 3rem);
	--fs-heading-sm: clamp(1rem, calc(0.33rem + 3.33vw), 1.5rem);
	--fw-regular: 400;

	/* Base 0.5 */
	--space-xs: 0.5rem;
	--space-sm: 1rem;
	--space-md: 1.5rem;
	--space-lg: 2rem;
	--space-xl: 3rem;

	--space-fluid: clamp(
		var(--space-sm),
		calc(-0.33rem + 6.67vw),
		var(--space-lg)
	);

	--btn-padding-block: clamp(0.5em, calc(0.41em + 0.46vw), 0.75em);
	--btn-padding-inline: clamp(0.75em, calc(0.47em + 1.36vw), 1.5em);

	--container-width: min(35rem, calc(100% - 4rem));

	--box-shadow: hsl(0 0% 25%) 5px 5px;
}

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

* {
	margin: 0;
	padding: 0;
}

html,
body {
	height: 100%;
}

h1,
h2,
h3,
p {
	margin: 0;
}

ul,
ol {
	list-style: none;
}

a {
	text-decoration: none;
	color: inherit;
}

button,
input,
select,
textarea {
	font: inherit;
}

:focus-visible {
	outline: 1.5px solid var(--clr-main);
	border-radius: 5px;
	outline-offset: 2.5px;
}

body {
	background-color: var(--clr-main-light);
	font-family: var(--ff-body);
	font-size: var(--fs-body);
	font-weight: var(--fw-regular);
	color: var(--clr-main);
	font-optical-sizing: auto;
	font-style: normal;
	line-height: 1.5;
}

.site {
	display: flex;
	min-height: 100vh;
	min-height: 100dvh;
	flex-direction: column;
}

.site-content {
	position: relative;
	flex: 1;
}

.wrapper {
	width: var(--container-width);
	margin-inline: auto;
	display: flex;
	flex-direction: column;
	gap: var(--space-fluid);
}

.overlay {
	position: fixed;
	inset: 0;
	background: hsl(0 2% 12% / 0.5);
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.3s ease;
	z-index: 90;
	width: 100vw;
	height: 100vh;
}

.overlay.modal-open {
	opacity: 1;
	pointer-events: auto;
}

.modal-input {
	display: flex;
	flex-direction: column;
	gap: var(--space-fluid);
	position: fixed;
	background-color: var(--clr-main-light);
	padding: var(--space-md);
	box-shadow: var(--box-shadow);
	border-radius: 5px;
	z-index: 100;
	width: min(90vw, 32rem);
	inset: 50% auto auto 50%;
	opacity: 0;
	pointer-events: none;
	transform: translate(-50%, -30px) scale(0.95);
	transform-origin: center;
	transition: opacity 300ms ease, transform 300ms ease;
}

.modal-input.modal-open {
	opacity: 1;
	transform: translate(-50%, -50%) scale(1);
	pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
	.modal-input {
		transition: opacity 300ms ease;
		transform: translate(-50%, -50%) scale(1);
	}
}

.modal-input h2 {
	font-size: var(--fs-heading-sm);
}

.inline {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: space-evenly;
	gap: var(--space-sm);
}

.sr-only {
	clip: rect(1px, 1px, 1px, 1px);
	clip-path: inset(50%);
	height: 1px;
	width: 1px;
	margin: -1px;
	overflow: hidden;
	padding: 0;
	position: absolute;
}

header {
	background-color: var(--clr-accent);
	text-align: center;
	box-shadow: hsl(0 0% 70%) 0 4px 12px;
	border-bottom: 1px solid var(--clr-accent-dark);
	color: var(--clr-main);
	margin-bottom: clamp(
		var(--space-sm),
		calc(-1.7rem + 13.3vw),
		var(--space-xl)
	);
	padding-block: clamp(0rem, calc(-1.33rem + 6.67vw), var(--space-sm));
}

p {
	text-align: center;
}

h1 {
	font-family: var(--ff-heading);
	font-size: var(--fs-heading);
}

label {
	text-align: left;
	display: block;
	margin-bottom: var(--space-xs);
	font-size: var(--fs-body-sm);
}

input {
	-webkit-appearance: none !important;
	-moz-appearance: none !important;
	appearance: none !important;
	padding: clamp(var(--space-xs), calc(-0.17rem + 3.33vw), var(--space-sm));
	background-color: var(--clr-main-light);
	width: 100%;
	border-radius: 5px;
	border: 1px solid var(--clr-main);
	display: block;
}

input:focus::placeholder {
	color: transparent;
}

input.error {
	outline: 3px solid var(--clr-error);
	color: var(--clr-error);
	animation: error 0.3s ease-in-out;
}

@keyframes error {
	0% {
		transform: translateX(0);
	}
	25% {
		transform: translateX(-0.75rem);
	}
	50% {
		transform: translateX(0.75rem);
	}
	100% {
		transform: translateX(0);
	}
}

@media (prefers-reduced-motion: reduce) {
	input.error {
		animation: none;
	}
}

.btn {
	background-color: var(--clr-accent);
	border: none;
	text-align: center;
	text-decoration: none;
	border-radius: 5px;
	padding: var(--btn-padding-block) var(--btn-padding-inline);
	border: 1px solid transparent;
	cursor: pointer;
	user-select: none;
	-webkit-user-select: none;
	touch-action: manipulation;
	-webkit-tap-highlight-color: transparent !important;
	-webkit-tap-highlight-color: hsl(0 0% 0% / 0);
	display: inline-block;
	border: 2px solid transparent;
}

.btn-secondary {
	background-color: var(--clr-main-light);
	color: var(--clr-accent-dark);
	border: 2px solid var(--clr-accent-dark);
}

.btn:hover {
	border: 2px solid var(--clr-accent-dark);
	box-shadow: var(--box-shadow);
}

.btn:hover:not(.btn-secondary) {
	color: var(--clr-main-light);
}

.paper {
	position: relative;
	padding: clamp(var(--space-sm), calc(-1.67rem + 13.33vw), var(--space-xl));
	box-shadow: var(--box-shadow);
	background-image: linear-gradient(#d8e6f5 1px, transparent 1px),
		linear-gradient(90deg, #d8e6f5 1px, transparent 1px);
	background-size: 24px 24px;
	border: 1px solid var(--clr-main);
	border-radius: 5px;
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: var(--space-xs);
}

.left {
	text-align: left;
}

.right {
	text-align: right;
}

.hidden {
	display: none;
}

.footer {
	background-color: var(--clr-main-light);
	font-size: var(--fs-body);
	line-height: 1.4;
	color: var(--clr-main);
	text-align: center;
	padding-block: clamp(
		var(--space-xs),
		calc(-0.17rem + 3.33vw),
		var(--space-sm)
	);
	box-shadow: 0 -8px 20px hsl(0, 0%, 90%);
}